Add m-esr52 at 52.6.0

1 files changed, 8563 insertions, 0 deletions

diff --git a/netwerk/protocol/http/nsHttpChannel.cpp b/netwerk/protocol/http/nsHttpChannel.cpp
new file mode 100644
index 000000000..0e570e8cb
--- /dev/null
+++ b/netwerk/protocol/http/nsHttpChannel.cpp
@@ -0,0 +1,8563 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim:set expandtab ts=4 sw=4 sts=4 cin: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// HttpLog.h should generally be included first
+#include "HttpLog.h"
+
+#include <inttypes.h>
+
+#include "mozilla/dom/nsCSPContext.h"
+#include "mozilla/Sprintf.h"
+
+#include "nsHttp.h"
+#include "nsHttpChannel.h"
+#include "nsHttpHandler.h"
+#include "nsIApplicationCacheService.h"
+#include "nsIApplicationCacheContainer.h"
+#include "nsICacheStorageService.h"
+#include "nsICacheStorage.h"
+#include "nsICacheEntry.h"
+#include "nsICaptivePortalService.h"
+#include "nsICryptoHash.h"
+#include "nsINetworkInterceptController.h"
+#include "nsINSSErrorsService.h"
+#include "nsISecurityReporter.h"
+#include "nsIStringBundle.h"
+#include "nsIStreamListenerTee.h"
+#include "nsISeekableStream.h"
+#include "nsILoadGroupChild.h"
+#include "nsIProtocolProxyService2.h"
+#include "nsIURIClassifier.h"
+#include "nsMimeTypes.h"
+#include "nsNetCID.h"
+#include "nsNetUtil.h"
+#include "nsIURL.h"
+#include "nsIStreamTransportService.h"
+#include "prnetdb.h"
+#include "nsEscape.h"
+#include "nsStreamUtils.h"
+#include "nsIOService.h"
+#include "nsDNSPrefetch.h"
+#include "nsChannelClassifier.h"
+#include "nsIRedirectResultListener.h"
+#include "mozilla/dom/ContentVerifier.h"
+#include "mozilla/TimeStamp.h"
+#include "nsError.h"
+#include "nsPrintfCString.h"
+#include "nsAlgorithm.h"
+#include "nsQueryObject.h"
+#include "GeckoProfiler.h"
+#include "nsIConsoleService.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/Preferences.h"
+#include "nsISSLSocketControl.h"
+#include "sslt.h"
+#include "nsContentUtils.h"
+#include "nsContentSecurityManager.h"
+#include "nsIClassOfService.h"
+#include "nsIPermissionManager.h"
+#include "nsIPrincipal.h"
+#include "nsIScriptSecurityManager.h"
+#include "nsISSLStatus.h"
+#include "nsISSLStatusProvider.h"
+#include "nsITransportSecurityInfo.h"
+#include "nsIWebProgressListener.h"
+#include "LoadContextInfo.h"
+#include "netCore.h"
+#include "nsHttpTransaction.h"
+#include "nsICacheEntryDescriptor.h"
+#include "nsICancelable.h"
+#include "nsIHttpChannelAuthProvider.h"
+#include "nsIHttpChannelInternal.h"
+#include "nsIHttpEventSink.h"
+#include "nsIPrompt.h"
+#include "nsInputStreamPump.h"
+#include "nsURLHelper.h"
+#include "nsISocketTransport.h"
+#include "nsIStreamConverterService.h"
+#include "nsISiteSecurityService.h"
+#include "nsString.h"
+#include "nsCRT.h"
+#include "CacheObserver.h"
+#include "mozilla/dom/Performance.h"
+#include "mozilla/Telemetry.h"
+#include "AlternateServices.h"
+#include "InterceptedChannel.h"
+#include "nsIHttpPushListener.h"
+#include "nsIX509Cert.h"
+#include "ScopedNSSTypes.h"
+#include "nsNullPrincipal.h"
+#include "nsIDeprecationWarner.h"
+#include "nsIDocument.h"
+#include "nsIDOMDocument.h"
+#include "nsICompressConvStats.h"
+#include "nsCORSListenerProxy.h"
+#include "nsISocketProvider.h"
+#include "mozilla/net/Predictor.h"
+#include "CacheControlParser.h"
+#include "nsMixedContentBlocker.h"
+#include "HSTSPrimerListener.h"
+#include "CacheStorageService.h"
+
+namespace mozilla { namespace net {
+
+namespace {
+
+// Monotonically increasing ID for generating unique cache entries per
+// intercepted channel.
+static uint64_t gNumIntercepted = 0;
+
+// True if the local cache should be bypassed when processing a request.
+#define BYPASS_LOCAL_CACHE(loadFlags) \
+        (loadFlags & (nsIRequest::LOAD_BYPASS_CACHE | \
+                      nsICachingChannel::LOAD_BYPASS_LOCAL_CACHE))
+
+#define RECOVER_FROM_CACHE_FILE_ERROR(result) \
+        ((result) == NS_ERROR_FILE_NOT_FOUND || \
+         (result) == NS_ERROR_FILE_CORRUPTED || \
+         (result) == NS_ERROR_OUT_OF_MEMORY)
+
+static NS_DEFINE_CID(kStreamListenerTeeCID, NS_STREAMLISTENERTEE_CID);
+static NS_DEFINE_CID(kStreamTransportServiceCID,
+                     NS_STREAMTRANSPORTSERVICE_CID);
+
+enum CacheDisposition {
+    kCacheHit = 1,
+    kCacheHitViaReval = 2,
+    kCacheMissedViaReval = 3,
+    kCacheMissed = 4
+};
+
+void
+AccumulateCacheHitTelemetry(CacheDisposition hitOrMiss)
+{
+    if (!CacheObserver::UseNewCache()) {
+        Telemetry::Accumulate(Telemetry::HTTP_CACHE_DISPOSITION_2, hitOrMiss);
+    }
+    else {
+        Telemetry::Accumulate(Telemetry::HTTP_CACHE_DISPOSITION_2_V2, hitOrMiss);
+
+        int32_t experiment = CacheObserver::HalfLifeExperiment();
+        if (experiment > 0 && hitOrMiss == kCacheMissed) {
+            Telemetry::Accumulate(Telemetry::HTTP_CACHE_MISS_HALFLIFE_EXPERIMENT_2,
+                                  experiment - 1);
+        }
+    }
+}
+
+// Computes and returns a SHA1 hash of the input buffer. The input buffer
+// must be a null-terminated string.
+nsresult
+Hash(const char *buf, nsACString &hash)
+{
+    nsresult rv;
+
+    nsCOMPtr<nsICryptoHash> hasher
+      = do_CreateInstance(NS_CRYPTO_HASH_CONTRACTID, &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = hasher->Init(nsICryptoHash::SHA1);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = hasher->Update(reinterpret_cast<unsigned const char*>(buf),
+                         strlen(buf));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = hasher->Finish(true, hash);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    return NS_OK;
+}
+
+bool
+IsInSubpathOfAppCacheManifest(nsIApplicationCache *cache, nsACString const& uriSpec)
+{
+    MOZ_ASSERT(cache);
+
+    static bool sForbid = true;
+    static nsresult once = Preferences::AddBoolVarCache(&sForbid, "network.appcache.forbid-fallback-outside-manifest-path", true);
+    Unused << once;
+
+    if (!sForbid) {
+      return true;
+    }
+
+    nsresult rv;
+
+    nsCOMPtr<nsIURI> uri;
+    rv = NS_NewURI(getter_AddRefs(uri), uriSpec);
+    if (NS_FAILED(rv)) {
+      return false;
+    }
+
+    nsCOMPtr<nsIURL> url(do_QueryInterface(uri, &rv));
+    if (NS_FAILED(rv)) {
+      return false;
+    }
+
+    nsAutoCString directory;
+    rv = url->GetDirectory(directory);
+    if (NS_FAILED(rv)) {
+      return false;
+    }
+
+    nsCOMPtr<nsIURI> manifestURI;
+    rv = cache->GetManifestURI(getter_AddRefs(manifestURI));
+    if (NS_FAILED(rv)) {
+      return false;
+    }
+
+    nsCOMPtr<nsIURL> manifestURL(do_QueryInterface(manifestURI, &rv));
+    if (NS_FAILED(rv)) {
+      return false;
+    }
+
+    nsAutoCString manifestDirectory;
+    rv = manifestURL->GetDirectory(manifestDirectory);
+    if (NS_FAILED(rv)) {
+      return false;
+    }
+
+    return StringBeginsWith(directory, manifestDirectory);
+}
+
+} // unnamed namespace
+
+// We only treat 3xx responses as redirects if they have a Location header and
+// the status code is in a whitelist.
+bool
+WillRedirect(nsHttpResponseHead * response)
+{
+    return nsHttpChannel::IsRedirectStatus(response->Status()) &&
+           response->HasHeader(nsHttp::Location);
+}
+
+nsresult
+StoreAuthorizationMetaData(nsICacheEntry *entry, nsHttpRequestHead *requestHead);
+
+class AutoRedirectVetoNotifier
+{
+public:
+    explicit AutoRedirectVetoNotifier(nsHttpChannel* channel) : mChannel(channel)
+    {
+      if (mChannel->mHasAutoRedirectVetoNotifier) {
+        MOZ_CRASH("Nested AutoRedirectVetoNotifier on the stack");
+        mChannel = nullptr;
+        return;
+      }
+
+      mChannel->mHasAutoRedirectVetoNotifier = true;
+    }
+    ~AutoRedirectVetoNotifier() {ReportRedirectResult(false);}
+    void RedirectSucceeded() {ReportRedirectResult(true);}
+
+private:
+    nsHttpChannel* mChannel;
+    void ReportRedirectResult(bool succeeded);
+};
+
+void
+AutoRedirectVetoNotifier::ReportRedirectResult(bool succeeded)
+{
+    if (!mChannel)
+        return;
+
+    mChannel->mRedirectChannel = nullptr;
+
+    nsCOMPtr<nsIRedirectResultListener> vetoHook;
+    NS_QueryNotificationCallbacks(mChannel,
+                                  NS_GET_IID(nsIRedirectResultListener),
+                                  getter_AddRefs(vetoHook));
+
+    nsHttpChannel* channel = mChannel;
+    mChannel = nullptr;
+
+    if (vetoHook)
+        vetoHook->OnRedirectResult(succeeded);
+
+    // Drop after the notification
+    channel->mHasAutoRedirectVetoNotifier = false;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <public>
+//-----------------------------------------------------------------------------
+
+nsHttpChannel::nsHttpChannel()
+    : HttpAsyncAborter<nsHttpChannel>(this)
+    , mLogicalOffset(0)
+    , mPostID(0)
+    , mRequestTime(0)
+    , mOfflineCacheLastModifiedTime(0)
+    , mInterceptCache(DO_NOT_INTERCEPT)
+    , mInterceptionID(gNumIntercepted++)
+    , mCacheOpenWithPriority(false)
+    , mCacheQueueSizeWhenOpen(0)
+    , mCachedContentIsValid(false)
+    , mCachedContentIsPartial(false)
+    , mCacheOnlyMetadata(false)
+    , mTransactionReplaced(false)
+    , mAuthRetryPending(false)
+    , mProxyAuthPending(false)
+    , mCustomAuthHeader(false)
+    , mResuming(false)
+    , mInitedCacheEntry(false)
+    , mFallbackChannel(false)
+    , mCustomConditionalRequest(false)
+    , mFallingBack(false)
+    , mWaitingForRedirectCallback(false)
+    , mRequestTimeInitialized(false)
+    , mCacheEntryIsReadOnly(false)
+    , mCacheEntryIsWriteOnly(false)
+    , mCacheEntriesToWaitFor(0)
+    , mHasQueryString(0)
+    , mConcurrentCacheAccess(0)
+    , mIsPartialRequest(0)
+    , mHasAutoRedirectVetoNotifier(0)
+    , mPinCacheContent(0)
+    , mIsCorsPreflightDone(0)
+    , mStronglyFramed(false)
+    , mUsedNetwork(0)
+    , mAuthConnectionRestartable(0)
+    , mPushedStream(nullptr)
+    , mLocalBlocklist(false)
+    , mWarningReporter(nullptr)
+    , mDidReval(false)
+{
+    LOG(("Creating nsHttpChannel [this=%p]\n", this));
+    mChannelCreationTime = PR_Now();
+    mChannelCreationTimestamp = TimeStamp::Now();
+}
+
+nsHttpChannel::~nsHttpChannel()
+{
+    LOG(("Destroying nsHttpChannel [this=%p]\n", this));
+
+    if (mAuthProvider)
+        mAuthProvider->Disconnect(NS_ERROR_ABORT);
+}
+
+nsresult
+nsHttpChannel::Init(nsIURI *uri,
+                    uint32_t caps,
+                    nsProxyInfo *proxyInfo,
+                    uint32_t proxyResolveFlags,
+                    nsIURI *proxyURI,
+                    const nsID& channelId)
+{
+    nsresult rv = HttpBaseChannel::Init(uri, caps, proxyInfo,
+                                        proxyResolveFlags, proxyURI, channelId);
+    if (NS_FAILED(rv))
+        return rv;
+
+    LOG(("nsHttpChannel::Init [this=%p]\n", this));
+
+    return rv;
+}
+
+nsresult
+nsHttpChannel::AddSecurityMessage(const nsAString& aMessageTag,
+                                  const nsAString& aMessageCategory)
+{
+    if (mWarningReporter) {
+        return mWarningReporter->ReportSecurityMessage(aMessageTag,
+                                                       aMessageCategory);
+    }
+    return HttpBaseChannel::AddSecurityMessage(aMessageTag,
+                                               aMessageCategory);
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <private>
+//-----------------------------------------------------------------------------
+
+nsresult
+nsHttpChannel::Connect()
+{
+    nsresult rv;
+
+    LOG(("nsHttpChannel::Connect [this=%p]\n", this));
+
+    // Note that we are only setting the "Upgrade-Insecure-Requests" request
+    // header for *all* navigational requests instead of all requests as
+    // defined in the spec, see:
+    // https://www.w3.org/TR/upgrade-insecure-requests/#preference
+    nsContentPolicyType type = mLoadInfo ?
+                               mLoadInfo->GetExternalContentPolicyType() :
+                               nsIContentPolicy::TYPE_OTHER;
+
+    if (type == nsIContentPolicy::TYPE_DOCUMENT ||
+        type == nsIContentPolicy::TYPE_SUBDOCUMENT) {
+        rv = SetRequestHeader(NS_LITERAL_CSTRING("Upgrade-Insecure-Requests"),
+                              NS_LITERAL_CSTRING("1"), false);
+        NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    bool isHttps = false;
+    rv = mURI->SchemeIs("https", &isHttps);
+    NS_ENSURE_SUCCESS(rv,rv);
+    nsCOMPtr<nsIPrincipal> resultPrincipal;
+    if (!isHttps && mLoadInfo) {
+        nsContentUtils::GetSecurityManager()->
+          GetChannelResultPrincipal(this, getter_AddRefs(resultPrincipal));
+    }
+    bool shouldUpgrade = false;
+    rv = NS_ShouldSecureUpgrade(mURI,
+                                mLoadInfo,
+                                resultPrincipal,
+                                mPrivateBrowsing,
+                                mAllowSTS,
+                                shouldUpgrade);
+    NS_ENSURE_SUCCESS(rv, rv);
+    if (shouldUpgrade) {
+        return AsyncCall(&nsHttpChannel::HandleAsyncRedirectChannelToHttps);
+    }
+
+    // ensure that we are using a valid hostname
+    if (!net_IsValidHostName(nsDependentCString(mConnectionInfo->Origin())))
+        return NS_ERROR_UNKNOWN_HOST;
+
+    if (mUpgradeProtocolCallback) {
+        mCaps |=  NS_HTTP_DISALLOW_SPDY;
+    }
+
+    // Finalize ConnectionInfo flags before SpeculativeConnect
+    mConnectionInfo->SetAnonymous((mLoadFlags & LOAD_ANONYMOUS) != 0);
+    mConnectionInfo->SetPrivate(mPrivateBrowsing);
+    mConnectionInfo->SetNoSpdy(mCaps & NS_HTTP_DISALLOW_SPDY);
+    mConnectionInfo->SetBeConservative((mCaps & NS_HTTP_BE_CONSERVATIVE) || mBeConservative);
+
+    // Consider opening a TCP connection right away.
+    SpeculativeConnect();
+
+    // Don't allow resuming when cache must be used
+    if (mResuming && (mLoadFlags & LOAD_ONLY_FROM_CACHE)) {
+        LOG(("Resuming from cache is not supported yet"));
+        return NS_ERROR_DOCUMENT_NOT_CACHED;
+    }
+
+    // open a cache entry for this channel...
+    rv = OpenCacheEntry(isHttps);
+
+    // do not continue if asyncOpenCacheEntry is in progress
+    if (AwaitingCacheCallbacks()) {
+        LOG(("nsHttpChannel::Connect %p AwaitingCacheCallbacks forces async\n", this));
+        MOZ_ASSERT(NS_SUCCEEDED(rv), "Unexpected state");
+        return NS_OK;
+    }
+
+    if (NS_FAILED(rv)) {
+        LOG(("OpenCacheEntry failed [rv=%x]\n", rv));
+        // if this channel is only allowed to pull from the cache, then
+        // we must fail if we were unable to open a cache entry.
+        if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
+            // If we have a fallback URI (and we're not already
+            // falling back), process the fallback asynchronously.
+            if (!mFallbackChannel && !mFallbackKey.IsEmpty()) {
+                return AsyncCall(&nsHttpChannel::HandleAsyncFallback);
+            }
+            return NS_ERROR_DOCUMENT_NOT_CACHED;
+        }
+        // otherwise, let's just proceed without using the cache.
+    }
+
+    return TryHSTSPriming();
+}
+
+nsresult
+nsHttpChannel::TryHSTSPriming()
+{
+    if (mLoadInfo) {
+        // HSTS priming requires the LoadInfo provided with AsyncOpen2
+        bool requireHSTSPriming =
+            mLoadInfo->GetForceHSTSPriming();
+
+        if (requireHSTSPriming &&
+                nsMixedContentBlocker::sSendHSTSPriming &&
+                mInterceptCache == DO_NOT_INTERCEPT) {
+            bool isHttpsScheme;
+            nsresult rv = mURI->SchemeIs("https", &isHttpsScheme);
+            NS_ENSURE_SUCCESS(rv, rv);
+            if (!isHttpsScheme) {
+                rv = HSTSPrimingListener::StartHSTSPriming(this, this);
+
+                if (NS_FAILED(rv)) {
+                    CloseCacheEntry(false);
+                    return rv;
+                }
+
+                return NS_OK;
+            }
+
+            // The request was already upgraded, for example by
+            // upgrade-insecure-requests or a prior successful priming request
+            Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
+                    HSTSPrimingResult::eHSTS_PRIMING_ALREADY_UPGRADED);
+            mLoadInfo->ClearHSTSPriming();
+        }
+    }
+
+    return ContinueConnect();
+}
+
+nsresult
+nsHttpChannel::ContinueConnect()
+{
+    // If we have had HSTS priming, we need to reevaluate whether we need
+    // a CORS preflight. Bug: 1272440
+    // If we need to start a CORS preflight, do it now!
+    // Note that it is important to do this before the early returns below.
+    if (!mIsCorsPreflightDone && mRequireCORSPreflight &&
+        mInterceptCache != INTERCEPTED) {
+        MOZ_ASSERT(!mPreflightChannel);
+        nsresult rv =
+            nsCORSListenerProxy::StartCORSPreflight(this, this,
+                                                    mUnsafeHeaders,
+                                                    getter_AddRefs(mPreflightChannel));
+        return rv;
+    }
+
+    MOZ_RELEASE_ASSERT(!(mRequireCORSPreflight &&
+                         mInterceptCache != INTERCEPTED) ||
+                       mIsCorsPreflightDone,
+                       "CORS preflight must have been finished by the time we "
+                       "do the rest of ContinueConnect");
+
+    // we may or may not have a cache entry at this point
+    if (mCacheEntry) {
+        // read straight from the cache if possible...
+        if (mCachedContentIsValid) {
+            nsRunnableMethod<nsHttpChannel> *event = nullptr;
+            if (!mCachedContentIsPartial) {
+                AsyncCall(&nsHttpChannel::AsyncOnExamineCachedResponse, &event);
+            }
+            nsresult rv = ReadFromCache(true);
+            if (NS_FAILED(rv) && event) {
+                event->Revoke();
+            }
+
+            // Don't accumulate the cache hit telemetry for intercepted channels.
+            if (mInterceptCache != INTERCEPTED) {
+                AccumulateCacheHitTelemetry(kCacheHit);
+            }
+
+            return rv;
+        }
+        else if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
+            // the cache contains the requested resource, but it must be
+            // validated before we can reuse it.  since we are not allowed
+            // to hit the net, there's nothing more to do.  the document
+            // is effectively not in the cache.
+            LOG(("  !mCachedContentIsValid && mLoadFlags & LOAD_ONLY_FROM_CACHE"));
+            return NS_ERROR_DOCUMENT_NOT_CACHED;
+        }
+    }
+    else if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
+        // If we have a fallback URI (and we're not already
+        // falling back), process the fallback asynchronously.
+        if (!mFallbackChannel && !mFallbackKey.IsEmpty()) {
+            return AsyncCall(&nsHttpChannel::HandleAsyncFallback);
+        }
+        LOG(("  !mCacheEntry && mLoadFlags & LOAD_ONLY_FROM_CACHE"));
+        return NS_ERROR_DOCUMENT_NOT_CACHED;
+    }
+
+    if (mLoadFlags & LOAD_NO_NETWORK_IO) {
+        LOG(("  mLoadFlags & LOAD_NO_NETWORK_IO"));
+        return NS_ERROR_DOCUMENT_NOT_CACHED;
+    }
+
+    // hit the net...
+    nsresult rv = SetupTransaction();
+    if (NS_FAILED(rv)) return rv;
+
+    rv = gHttpHandler->InitiateTransaction(mTransaction, mPriority);
+    if (NS_FAILED(rv)) return rv;
+
+    rv = mTransactionPump->AsyncRead(this, nullptr);
+    if (NS_FAILED(rv)) return rv;
+
+    uint32_t suspendCount = mSuspendCount;
+    while (suspendCount--)
+        mTransactionPump->Suspend();
+
+    return NS_OK;
+}
+
+void
+nsHttpChannel::SpeculativeConnect()
+{
+    // Before we take the latency hit of dealing with the cache, try and
+    // get the TCP (and SSL) handshakes going so they can overlap.
+
+    // don't speculate if we are on a local blocklist, on uses of the offline
+    // application cache, if we are offline, when doing http upgrade (i.e.
+    // websockets bootstrap), or if we can't do keep-alive (because then we
+    // couldn't reuse the speculative connection anyhow).
+    if (mLocalBlocklist || mApplicationCache || gIOService->IsOffline() ||
+        mUpgradeProtocolCallback || !(mCaps & NS_HTTP_ALLOW_KEEPALIVE))
+        return;
+
+    // LOAD_ONLY_FROM_CACHE and LOAD_NO_NETWORK_IO must not hit network.
+    // LOAD_FROM_CACHE and LOAD_CHECK_OFFLINE_CACHE are unlikely to hit network,
+    // so skip preconnects for them.
+    if (mLoadFlags & (LOAD_ONLY_FROM_CACHE | LOAD_FROM_CACHE |
+                      LOAD_NO_NETWORK_IO | LOAD_CHECK_OFFLINE_CACHE))
+        return;
+
+    if (mAllowStaleCacheContent) {
+        return;
+    }
+
+    nsCOMPtr<nsIInterfaceRequestor> callbacks;
+    NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
+                                           getter_AddRefs(callbacks));
+    if (!callbacks)
+        return;
+
+    gHttpHandler->SpeculativeConnect(
+        mConnectionInfo, callbacks, mCaps & NS_HTTP_DISALLOW_SPDY);
+}
+
+void
+nsHttpChannel::DoNotifyListenerCleanup()
+{
+    // We don't need this info anymore
+    CleanRedirectCacheChainIfNecessary();
+}
+
+void
+nsHttpChannel::HandleAsyncRedirect()
+{
+    NS_PRECONDITION(!mCallOnResume, "How did that happen?");
+
+    if (mSuspendCount) {
+        LOG(("Waiting until resume to do async redirect [this=%p]\n", this));
+        mCallOnResume = &nsHttpChannel::HandleAsyncRedirect;
+        return;
+    }
+
+    nsresult rv = NS_OK;
+
+    LOG(("nsHttpChannel::HandleAsyncRedirect [this=%p]\n", this));
+
+    // since this event is handled asynchronously, it is possible that this
+    // channel could have been canceled, in which case there would be no point
+    // in processing the redirect.
+    if (NS_SUCCEEDED(mStatus)) {
+        PushRedirectAsyncFunc(&nsHttpChannel::ContinueHandleAsyncRedirect);
+        rv = AsyncProcessRedirection(mResponseHead->Status());
+        if (NS_FAILED(rv)) {
+            PopRedirectAsyncFunc(&nsHttpChannel::ContinueHandleAsyncRedirect);
+            // TODO: if !DoNotRender3xxBody(), render redirect body instead.
+            // But first we need to cache 3xx bodies (bug 748510)
+            ContinueHandleAsyncRedirect(rv);
+        }
+    }
+    else {
+        ContinueHandleAsyncRedirect(mStatus);
+    }
+}
+
+nsresult
+nsHttpChannel::ContinueHandleAsyncRedirect(nsresult rv)
+{
+    if (NS_FAILED(rv)) {
+        // If AsyncProcessRedirection fails, then we have to send out the
+        // OnStart/OnStop notifications.
+        LOG(("ContinueHandleAsyncRedirect got failure result [rv=%x]\n", rv));
+
+        bool redirectsEnabled =
+            !mLoadInfo || !mLoadInfo->GetDontFollowRedirects();
+
+        if (redirectsEnabled) {
+            // TODO: stop failing original channel if redirect vetoed?
+            mStatus = rv;
+
+            DoNotifyListener();
+
+            // Blow away cache entry if we couldn't process the redirect
+            // for some reason (the cache entry might be corrupt).
+            if (mCacheEntry) {
+                mCacheEntry->AsyncDoom(nullptr);
+            }
+        }
+        else {
+            DoNotifyListener();
+        }
+    }
+
+    CloseCacheEntry(true);
+
+    mIsPending = false;
+
+    if (mLoadGroup)
+        mLoadGroup->RemoveRequest(this, nullptr, mStatus);
+
+    return NS_OK;
+}
+
+void
+nsHttpChannel::HandleAsyncNotModified()
+{
+    NS_PRECONDITION(!mCallOnResume, "How did that happen?");
+
+    if (mSuspendCount) {
+        LOG(("Waiting until resume to do async not-modified [this=%p]\n",
+             this));
+        mCallOnResume = &nsHttpChannel::HandleAsyncNotModified;
+        return;
+    }
+
+    LOG(("nsHttpChannel::HandleAsyncNotModified [this=%p]\n", this));
+
+    DoNotifyListener();
+
+    CloseCacheEntry(false);
+
+    mIsPending = false;
+
+    if (mLoadGroup)
+        mLoadGroup->RemoveRequest(this, nullptr, mStatus);
+}
+
+void
+nsHttpChannel::HandleAsyncFallback()
+{
+    NS_PRECONDITION(!mCallOnResume, "How did that happen?");
+
+    if (mSuspendCount) {
+        LOG(("Waiting until resume to do async fallback [this=%p]\n", this));
+        mCallOnResume = &nsHttpChannel::HandleAsyncFallback;
+        return;
+    }
+
+    nsresult rv = NS_OK;
+
+    LOG(("nsHttpChannel::HandleAsyncFallback [this=%p]\n", this));
+
+    // since this event is handled asynchronously, it is possible that this
+    // channel could have been canceled, in which case there would be no point
+    // in processing the fallback.
+    if (!mCanceled) {
+        PushRedirectAsyncFunc(&nsHttpChannel::ContinueHandleAsyncFallback);
+        bool waitingForRedirectCallback;
+        rv = ProcessFallback(&waitingForRedirectCallback);
+        if (waitingForRedirectCallback)
+            return;
+        PopRedirectAsyncFunc(&nsHttpChannel::ContinueHandleAsyncFallback);
+    }
+
+    ContinueHandleAsyncFallback(rv);
+}
+
+nsresult
+nsHttpChannel::ContinueHandleAsyncFallback(nsresult rv)
+{
+    if (!mCanceled && (NS_FAILED(rv) || !mFallingBack)) {
+        // If ProcessFallback fails, then we have to send out the
+        // OnStart/OnStop notifications.
+        LOG(("ProcessFallback failed [rv=%x, %d]\n", rv, mFallingBack));
+        mStatus = NS_FAILED(rv) ? rv : NS_ERROR_DOCUMENT_NOT_CACHED;
+        DoNotifyListener();
+    }
+
+    mIsPending = false;
+
+    if (mLoadGroup)
+        mLoadGroup->RemoveRequest(this, nullptr, mStatus);
+
+    return rv;
+}
+
+void
+nsHttpChannel::SetupTransactionRequestContext()
+{
+    if (!EnsureRequestContextID()) {
+        return;
+    }
+
+    nsIRequestContextService *rcsvc =
+        gHttpHandler->GetRequestContextService();
+    if (!rcsvc) {
+        return;
+    }
+
+    nsCOMPtr<nsIRequestContext> rc;
+    nsresult rv = rcsvc->GetRequestContext(mRequestContextID,
+                                           getter_AddRefs(rc));
+
+    if (NS_FAILED(rv)) {
+        return;
+    }
+
+    mTransaction->SetRequestContext(rc);
+}
+
+static bool
+SafeForPipelining(nsHttpRequestHead::ParsedMethodType method,
+                  const nsCString &methodString)
+{
+    if (method == nsHttpRequestHead::kMethod_Get ||
+        method == nsHttpRequestHead::kMethod_Head ||
+        method == nsHttpRequestHead::kMethod_Options) {
+        return true;
+    }
+
+    if (method != nsHttpRequestHead::kMethod_Custom) {
+        return false;
+    }
+
+    return (!strcmp(methodString.get(), "PROPFIND") ||
+            !strcmp(methodString.get(), "PROPPATCH"));
+}
+
+nsresult
+nsHttpChannel::SetupTransaction()
+{
+    LOG(("nsHttpChannel::SetupTransaction [this=%p]\n", this));
+
+    NS_ENSURE_TRUE(!mTransaction, NS_ERROR_ALREADY_INITIALIZED);
+
+    nsresult rv;
+
+    mUsedNetwork = 1;
+    if (mCaps & NS_HTTP_ALLOW_PIPELINING) {
+        //
+        // disable pipelining if:
+        //   (1) pipelining has been disabled by config
+        //   (2) pipelining has been disabled by connection mgr info
+        //   (3) request corresponds to a top-level document load (link click)
+        //   (4) request method is non-idempotent
+        //   (5) request is marked slow (e.g XHR)
+        //
+        nsAutoCString method;
+        mRequestHead.Method(method);
+        if (!mAllowPipelining ||
+           (mLoadFlags & (LOAD_INITIAL_DOCUMENT_URI | INHIBIT_PIPELINE)) ||
+            !SafeForPipelining(mRequestHead.ParsedMethod(), method)) {
+            LOG(("  pipelining disallowed\n"));
+            mCaps &= ~NS_HTTP_ALLOW_PIPELINING;
+        }
+    }
+
+    if (!mAllowSpdy) {
+        mCaps |= NS_HTTP_DISALLOW_SPDY;
+    }
+    if (mBeConservative) {
+        mCaps |= NS_HTTP_BE_CONSERVATIVE;
+    }
+
+    // Use the URI path if not proxying (transparent proxying such as proxy
+    // CONNECT does not count here). Also figure out what HTTP version to use.
+    nsAutoCString buf, path;
+    nsCString* requestURI;
+
+    // This is the normal e2e H1 path syntax "/index.html"
+    rv = mURI->GetPath(path);
+    if (NS_FAILED(rv)) {
+        return rv;
+    }
+
+    // path may contain UTF-8 characters, so ensure that they're escaped.
+    if (NS_EscapeURL(path.get(), path.Length(), esc_OnlyNonASCII, buf)) {
+        requestURI = &buf;
+    } else {
+        requestURI = &path;
+    }
+
+    // trim off the #ref portion if any...
+    int32_t ref1 = requestURI->FindChar('#');
+    if (ref1 != kNotFound) {
+        requestURI->SetLength(ref1);
+    }
+
+    if (mConnectionInfo->UsingConnect() || !mConnectionInfo->UsingHttpProxy()) {
+        mRequestHead.SetVersion(gHttpHandler->HttpVersion());
+    }
+    else {
+        mRequestHead.SetPath(*requestURI);
+
+        // RequestURI should be the absolute uri H1 proxy syntax "http://foo/index.html"
+        // so we will overwrite the relative version in requestURI
+        rv = mURI->GetUserPass(buf);
+        if (NS_FAILED(rv)) return rv;
+        if (!buf.IsEmpty() && ((strncmp(mSpec.get(), "http:", 5) == 0) ||
+                                strncmp(mSpec.get(), "https:", 6) == 0)) {
+            nsCOMPtr<nsIURI> tempURI;
+            rv = mURI->Clone(getter_AddRefs(tempURI));
+            if (NS_FAILED(rv)) return rv;
+            rv = tempURI->SetUserPass(EmptyCString());
+            if (NS_FAILED(rv)) return rv;
+            rv = tempURI->GetAsciiSpec(path);
+            if (NS_FAILED(rv)) return rv;
+            requestURI = &path;
+        } else {
+            requestURI = &mSpec;
+        }
+
+        // trim off the #ref portion if any...
+        int32_t ref2 = requestURI->FindChar('#');
+        if (ref2 != kNotFound) {
+            requestURI->SetLength(ref2);
+        }
+
+        mRequestHead.SetVersion(gHttpHandler->ProxyHttpVersion());
+    }
+
+    mRequestHead.SetRequestURI(*requestURI);
+
+    // set the request time for cache expiration calculations
+    mRequestTime = NowInSeconds();
+    mRequestTimeInitialized = true;
+
+    // if doing a reload, force end-to-end
+    if (mLoadFlags & LOAD_BYPASS_CACHE) {
+        // We need to send 'Pragma:no-cache' to inhibit proxy caching even if
+        // no proxy is configured since we might be talking with a transparent
+        // proxy, i.e. one that operates at the network level.  See bug #14772.
+        mRequestHead.SetHeaderOnce(nsHttp::Pragma, "no-cache", true);
+        // If we're configured to speak HTTP/1.1 then also send 'Cache-control:
+        // no-cache'
+        if (mRequestHead.Version() >= NS_HTTP_VERSION_1_1)
+            mRequestHead.SetHeaderOnce(nsHttp::Cache_Control, "no-cache", true);
+    }
+    else if ((mLoadFlags & VALIDATE_ALWAYS) && !mCacheEntryIsWriteOnly) {
+        // We need to send 'Cache-Control: max-age=0' to force each cache along
+        // the path to the origin server to revalidate its own entry, if any,
+        // with the next cache or server.  See bug #84847.
+        //
+        // If we're configured to speak HTTP/1.0 then just send 'Pragma: no-cache'
+        if (mRequestHead.Version() >= NS_HTTP_VERSION_1_1)
+            mRequestHead.SetHeaderOnce(nsHttp::Cache_Control, "max-age=0", true);
+        else
+            mRequestHead.SetHeaderOnce(nsHttp::Pragma, "no-cache", true);
+    }
+
+    if (mResuming) {
+        char byteRange[32];
+        SprintfLiteral(byteRange, "bytes=%" PRIu64 "-", mStartPos);
+        mRequestHead.SetHeader(nsHttp::Range, nsDependentCString(byteRange));
+
+        if (!mEntityID.IsEmpty()) {
+            // Also, we want an error if this resource changed in the meantime
+            // Format of the entity id is: escaped_etag/size/lastmod
+            nsCString::const_iterator start, end, slash;
+            mEntityID.BeginReading(start);
+            mEntityID.EndReading(end);
+            mEntityID.BeginReading(slash);
+
+            if (FindCharInReadable('/', slash, end)) {
+                nsAutoCString ifMatch;
+                mRequestHead.SetHeader(nsHttp::If_Match,
+                        NS_UnescapeURL(Substring(start, slash), 0, ifMatch));
+
+                ++slash; // Incrementing, so that searching for '/' won't find
+                         // the same slash again
+            }
+
+            if (FindCharInReadable('/', slash, end)) {
+                mRequestHead.SetHeader(nsHttp::If_Unmodified_Since,
+                        Substring(++slash, end));
+            }
+        }
+    }
+
+    // create wrapper for this channel's notification callbacks
+    nsCOMPtr<nsIInterfaceRequestor> callbacks;
+    NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
+                                           getter_AddRefs(callbacks));
+
+    // create the transaction object
+    mTransaction = new nsHttpTransaction();
+    LOG(("nsHttpChannel %p created nsHttpTransaction %p\n", this, mTransaction.get()));
+    mTransaction->SetTransactionObserver(mTransactionObserver);
+    mTransactionObserver = nullptr;
+
+    // See bug #466080. Transfer LOAD_ANONYMOUS flag to socket-layer.
+    if (mLoadFlags & LOAD_ANONYMOUS)
+        mCaps |= NS_HTTP_LOAD_ANONYMOUS;
+
+    if (mTimingEnabled)
+        mCaps |= NS_HTTP_TIMING_ENABLED;
+
+    if (mUpgradeProtocolCallback) {
+        mRequestHead.SetHeader(nsHttp::Upgrade, mUpgradeProtocol, false);
+        mRequestHead.SetHeaderOnce(nsHttp::Connection,
+                                   nsHttp::Upgrade.get(),
+                                   true);
+        mCaps |=  NS_HTTP_STICKY_CONNECTION;
+        mCaps &= ~NS_HTTP_ALLOW_PIPELINING;
+        mCaps &= ~NS_HTTP_ALLOW_KEEPALIVE;
+    }
+
+    if (mPushedStream) {
+        mTransaction->SetPushedStream(mPushedStream);
+        mPushedStream = nullptr;
+    }
+
+    nsCOMPtr<nsIHttpPushListener> pushListener;
+    NS_QueryNotificationCallbacks(mCallbacks,
+                                  mLoadGroup,
+                                  NS_GET_IID(nsIHttpPushListener),
+                                  getter_AddRefs(pushListener));
+    if (pushListener) {
+        mCaps |= NS_HTTP_ONPUSH_LISTENER;
+    }
+
+    nsCOMPtr<nsIAsyncInputStream> responseStream;
+    rv = mTransaction->Init(mCaps, mConnectionInfo, &mRequestHead,
+                            mUploadStream, mUploadStreamHasHeaders,
+                            NS_GetCurrentThread(), callbacks, this,
+                            getter_AddRefs(responseStream));
+    if (NS_FAILED(rv)) {
+        mTransaction = nullptr;
+        return rv;
+    }
+
+    mTransaction->SetClassOfService(mClassOfService);
+    SetupTransactionRequestContext();
+
+    rv = nsInputStreamPump::Create(getter_AddRefs(mTransactionPump),
+                                   responseStream);
+    return rv;
+}
+
+// NOTE: This function duplicates code from nsBaseChannel. This will go away
+// once HTTP uses nsBaseChannel (part of bug 312760)
+static void
+CallTypeSniffers(void *aClosure, const uint8_t *aData, uint32_t aCount)
+{
+  nsIChannel *chan = static_cast<nsIChannel*>(aClosure);
+
+  nsAutoCString newType;
+  NS_SniffContent(NS_CONTENT_SNIFFER_CATEGORY, chan, aData, aCount, newType);
+  if (!newType.IsEmpty()) {
+    chan->SetContentType(newType);
+  }
+}
+
+// Helper Function to report messages to the console when loading
+// a resource was blocked due to a MIME type mismatch.
+void
+ReportTypeBlocking(nsIURI* aURI,
+                   nsILoadInfo* aLoadInfo,
+                   const char* aMessageName)
+{
+    NS_ConvertUTF8toUTF16 specUTF16(aURI->GetSpecOrDefault());
+    const char16_t* params[] = { specUTF16.get() };
+    nsCOMPtr<nsIDocument> doc;
+    if (aLoadInfo) {
+        nsCOMPtr<nsIDOMDocument> domDoc;
+        aLoadInfo->GetLoadingDocument(getter_AddRefs(domDoc));
+        if (domDoc) {
+            doc = do_QueryInterface(domDoc);
+        }
+    }
+    nsContentUtils::ReportToConsole(nsIScriptError::errorFlag,
+                                    NS_LITERAL_CSTRING("MIMEMISMATCH"),
+                                    doc,
+                                    nsContentUtils::eSECURITY_PROPERTIES,
+                                    aMessageName,
+                                    params, ArrayLength(params));
+}
+
+// Check and potentially enforce X-Content-Type-Options: nosniff
+nsresult
+ProcessXCTO(nsIURI* aURI, nsHttpResponseHead* aResponseHead, nsILoadInfo* aLoadInfo)
+{
+    if (!aURI || !aResponseHead || !aLoadInfo) {
+        // if there is no uri, no response head or no loadInfo, then there is nothing to do
+        return NS_OK;
+    }
+
+    // 1) Query the XCTO header and check if 'nosniff' is the first value.
+    nsAutoCString contentTypeOptionsHeader;
+    aResponseHead->GetHeader(nsHttp::X_Content_Type_Options, contentTypeOptionsHeader);
+    if (contentTypeOptionsHeader.IsEmpty()) {
+        // if there is no XCTO header, then there is nothing to do.
+        return NS_OK;
+    }
+    // XCTO header might contain multiple values which are comma separated, so:
+    // a) let's skip all subsequent values
+    //     e.g. "   NoSniFF   , foo " will be "   NoSniFF   "
+    int32_t idx = contentTypeOptionsHeader.Find(",");
+    if (idx > 0) {
+      contentTypeOptionsHeader = Substring(contentTypeOptionsHeader, 0, idx);
+    }
+    // b) let's trim all surrounding whitespace
+    //    e.g. "   NoSniFF   " -> "NoSniFF"
+    contentTypeOptionsHeader.StripWhitespace();
+    // c) let's compare the header (ignoring case)
+    //    e.g. "NoSniFF" -> "nosniff"
+    //    if it's not 'nosniff' then there is nothing to do here
+    if (!contentTypeOptionsHeader.EqualsIgnoreCase("nosniff")) {
+        // since we are getting here, the XCTO header was sent;
+        // a non matching value most likely means a mistake happenend;
+        // e.g. sending 'nosnif' instead of 'nosniff', let's log a warning.
+        NS_ConvertUTF8toUTF16 char16_header(contentTypeOptionsHeader);
+        const char16_t* params[] = { char16_header.get() };
+        nsCOMPtr<nsIDocument> doc;
+        nsCOMPtr<nsIDOMDocument> domDoc;
+        aLoadInfo->GetLoadingDocument(getter_AddRefs(domDoc));
+        if (domDoc) {
+          doc = do_QueryInterface(domDoc);
+        }
+        nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
+                                        NS_LITERAL_CSTRING("XCTO"),
+                                        doc,
+                                        nsContentUtils::eSECURITY_PROPERTIES,
+                                        "XCTOHeaderValueMissing",
+                                        params, ArrayLength(params));
+        return NS_OK;
+    }
+
+    // 2) Query the content type from the channel
+    nsAutoCString contentType;
+    aResponseHead->ContentType(contentType);
+
+    // 3) Compare the expected MIME type with the actual type
+    if (aLoadInfo->GetExternalContentPolicyType() == nsIContentPolicy::TYPE_STYLESHEET) {
+        if (contentType.EqualsLiteral(TEXT_CSS)) {
+            return NS_OK;
+        }
+        ReportTypeBlocking(aURI, aLoadInfo, "MimeTypeMismatch");
+        return NS_ERROR_CORRUPTED_CONTENT;
+    }
+
+    if (aLoadInfo->GetExternalContentPolicyType() == nsIContentPolicy::TYPE_IMAGE) {
+        if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("image/"))) {
+            Accumulate(Telemetry::XCTO_NOSNIFF_BLOCK_IMAGE, 0);
+            return NS_OK;
+        }
+        Accumulate(Telemetry::XCTO_NOSNIFF_BLOCK_IMAGE, 1);
+        // Instead of consulting Preferences::GetBool() all the time we
+        // can cache the result to speed things up.
+        static bool sXCTONosniffBlockImages = false;
+        static bool sIsInited = false;
+        if (!sIsInited) {
+            sIsInited = true;
+            Preferences::AddBoolVarCache(&sXCTONosniffBlockImages,
+            "security.xcto_nosniff_block_images");
+        }
+        if (!sXCTONosniffBlockImages) {
+            return NS_OK;
+        }
+        ReportTypeBlocking(aURI, aLoadInfo, "MimeTypeMismatch");
+        return NS_ERROR_CORRUPTED_CONTENT;
+    }
+
+    if (aLoadInfo->GetExternalContentPolicyType() == nsIContentPolicy::TYPE_SCRIPT) {
+        if (nsContentUtils::IsScriptType(contentType)) {
+            return NS_OK;
+        }
+        ReportTypeBlocking(aURI, aLoadInfo, "MimeTypeMismatch");
+        return NS_ERROR_CORRUPTED_CONTENT;
+    }
+    return NS_OK;
+}
+
+// Ensure that a load of type script has correct MIME type
+nsresult
+EnsureMIMEOfScript(nsIURI* aURI, nsHttpResponseHead* aResponseHead, nsILoadInfo* aLoadInfo)
+{
+    if (!aURI || !aResponseHead || !aLoadInfo) {
+        // if there is no uri, no response head or no loadInfo, then there is nothing to do
+        return NS_OK;
+    }
+
+    if (aLoadInfo->GetExternalContentPolicyType() != nsIContentPolicy::TYPE_SCRIPT) {
+        // if this is not a script load, then there is nothing to do
+        return NS_OK;
+    }
+
+    nsAutoCString contentType;
+    aResponseHead->ContentType(contentType);
+    NS_ConvertUTF8toUTF16 typeString(contentType);
+
+    if (nsContentUtils::IsJavascriptMIMEType(typeString)) {
+        // script load has type script
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 1);
+        return NS_OK;
+    }
+
+    bool block = false;
+    if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("image/"))) {
+        // script load has type image
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 2);
+        block = true;
+    } else if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("audio/"))) {
+        // script load has type audio
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 3);
+        block = true;
+    } else if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("video/"))) {
+        // script load has type video
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 4);
+        block = true;
+    } else if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("text/csv"))) {
+        // script load has type text/csv
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 6);
+        block = true;
+    }
+
+    if (block) {
+        // Instead of consulting Preferences::GetBool() all the time we
+        // can cache the result to speed things up.
+        static bool sCachedBlockScriptWithWrongMime = false;
+        static bool sIsInited = false;
+        if (!sIsInited) {
+            sIsInited = true;
+            Preferences::AddBoolVarCache(&sCachedBlockScriptWithWrongMime,
+            "security.block_script_with_wrong_mime");
+        }
+
+        // Do not block the load if the feature is not enabled.
+        if (!sCachedBlockScriptWithWrongMime) {
+            return NS_OK;
+        }
+
+        ReportTypeBlocking(aURI, aLoadInfo, "BlockScriptWithWrongMimeType");
+        return NS_ERROR_CORRUPTED_CONTENT;
+    }
+
+    if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("text/plain"))) {
+        // script load has type text/plain
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 5);
+        return NS_OK;
+    }
+
+    if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("text/xml"))) {
+        // script load has type text/xml
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 7);
+        return NS_OK;
+    }
+
+    if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("application/octet-stream"))) {
+        // script load has type application/octet-stream
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 8);
+        return NS_OK;
+    }
+
+    if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("application/xml"))) {
+        // script load has type application/xml
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 9);
+        return NS_OK;
+    }
+
+    if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("text/html"))) {
+        // script load has type text/html
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 10);
+        return NS_OK;
+    }
+
+    if (contentType.IsEmpty()) {
+        // script load has no type
+        Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 11);
+        return NS_OK;
+    }
+
+    // script load has unknown type
+    Telemetry::Accumulate(Telemetry::SCRIPT_BLOCK_INCORRECT_MIME, 0);
+    return NS_OK;
+}
+
+
+nsresult
+nsHttpChannel::CallOnStartRequest()
+{
+    MOZ_RELEASE_ASSERT(!(mRequireCORSPreflight &&
+                         mInterceptCache != INTERCEPTED) ||
+                       mIsCorsPreflightDone,
+                       "CORS preflight must have been finished by the time we "
+                       "call OnStartRequest");
+
+    nsresult rv = EnsureMIMEOfScript(mURI, mResponseHead, mLoadInfo);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = ProcessXCTO(mURI, mResponseHead, mLoadInfo);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (mOnStartRequestCalled) {
+        // This can only happen when a range request loading rest of the data
+        // after interrupted concurrent cache read asynchronously failed, e.g.
+        // the response range bytes are not as expected or this channel has
+        // been externally canceled.
+        //
+        // It's legal to bypass CallOnStartRequest for that case since we've
+        // already called OnStartRequest on our listener and also added all
+        // content converters before.
+        MOZ_ASSERT(mConcurrentCacheAccess);
+        LOG(("CallOnStartRequest already invoked before"));
+        return mStatus;
+    }
+
+    mTracingEnabled = false;
+
+    // Allow consumers to override our content type
+    if (mLoadFlags & LOAD_CALL_CONTENT_SNIFFERS) {
+        // NOTE: We can have both a txn pump and a cache pump when the cache
+        // content is partial. In that case, we need to read from the cache,
+        // because that's the one that has the initial contents. If that fails
+        // then give the transaction pump a shot.
+
+        nsIChannel* thisChannel = static_cast<nsIChannel*>(this);
+
+        bool typeSniffersCalled = false;
+        if (mCachePump) {
+          typeSniffersCalled =
+            NS_SUCCEEDED(mCachePump->PeekStream(CallTypeSniffers, thisChannel));
+        }
+
+        if (!typeSniffersCalled && mTransactionPump) {
+          mTransactionPump->PeekStream(CallTypeSniffers, thisChannel);
+        }
+    }
+
+    bool unknownDecoderStarted = false;
+    if (mResponseHead && !mResponseHead->HasContentType()) {
+        MOZ_ASSERT(mConnectionInfo, "Should have connection info here");
+        if (!mContentTypeHint.IsEmpty())
+            mResponseHead->SetContentType(mContentTypeHint);
+        else if (mResponseHead->Version() == NS_HTTP_VERSION_0_9 &&
+                 mConnectionInfo->OriginPort() != mConnectionInfo->DefaultPort())
+            mResponseHead->SetContentType(NS_LITERAL_CSTRING(TEXT_PLAIN));
+        else {
+            // Uh-oh.  We had better find out what type we are!
+            nsCOMPtr<nsIStreamConverterService> serv;
+            rv = gHttpHandler->
+                GetStreamConverterService(getter_AddRefs(serv));
+            // If we failed, we just fall through to the "normal" case
+            if (NS_SUCCEEDED(rv)) {
+                nsCOMPtr<nsIStreamListener> converter;
+                rv = serv->AsyncConvertData(UNKNOWN_CONTENT_TYPE,
+                                            "*/*",
+                                            mListener,
+                                            mListenerContext,
+                                            getter_AddRefs(converter));
+                if (NS_SUCCEEDED(rv)) {
+                    mListener = converter;
+                    unknownDecoderStarted = true;
+                }
+            }
+        }
+    }
+
+    if (mResponseHead && !mResponseHead->HasContentCharset())
+        mResponseHead->SetContentCharset(mContentCharsetHint);
+
+    if (mResponseHead && mCacheEntry) {
+        // If we have a cache entry, set its predicted size to TotalEntitySize to
+        // avoid caching an entry that will exceed the max size limit.
+        rv = mCacheEntry->SetPredictedDataSize(
+            mResponseHead->TotalEntitySize());
+        if (NS_ERROR_FILE_TOO_BIG == rv) {
+          // Don't throw the entry away, we will need it later.
+          LOG(("  entry too big"));
+        } else {
+          NS_ENSURE_SUCCESS(rv, rv);
+        }
+    }
+
+    LOG(("  calling mListener->OnStartRequest\n"));
+    if (mListener) {
+        MOZ_ASSERT(!mOnStartRequestCalled,
+                   "We should not call OsStartRequest twice");
+        nsCOMPtr<nsIStreamListener> deleteProtector(mListener);
+        rv = deleteProtector->OnStartRequest(this, mListenerContext);
+        mOnStartRequestCalled = true;
+        if (NS_FAILED(rv))
+            return rv;
+    } else {
+        NS_WARNING("OnStartRequest skipped because of null listener");
+        mOnStartRequestCalled = true;
+    }
+
+    // Install stream converter if required.
+    // If we use unknownDecoder, stream converters will be installed later (in
+    // nsUnknownDecoder) after OnStartRequest is called for the real listener.
+    if (!unknownDecoderStarted) {
+      nsCOMPtr<nsIStreamListener> listener;
+      nsISupports *ctxt = mListenerContext;
+      rv = DoApplyContentConversions(mListener, getter_AddRefs(listener), ctxt);
+      if (NS_FAILED(rv)) {
+        return rv;
+      }
+      if (listener) {
+        mListener = listener;
+        mCompressListener = listener;
+      }
+    }
+
+    rv = EnsureAssocReq();
+    if (NS_FAILED(rv))
+        return rv;
+
+    // if this channel is for a download, close off access to the cache.
+    if (mCacheEntry && mChannelIsForDownload) {
+        mCacheEntry->AsyncDoom(nullptr);
+
+        // We must keep the cache entry in case of partial request.
+        // Concurrent access is the same, we need the entry in
+        // OnStopRequest.
+        if (!mCachedContentIsPartial && !mConcurrentCacheAccess)
+            CloseCacheEntry(false);
+    }
+
+    if (!mCanceled) {
+        // create offline cache entry if offline caching was requested
+        if (ShouldUpdateOfflineCacheEntry()) {
+            LOG(("writing to the offline cache"));
+            rv = InitOfflineCacheEntry();
+            if (NS_FAILED(rv)) return rv;
+
+            // InitOfflineCacheEntry may have closed mOfflineCacheEntry
+            if (mOfflineCacheEntry) {
+                rv = InstallOfflineCacheListener();
+                if (NS_FAILED(rv)) return rv;
+            }
+        } else if (mApplicationCacheForWrite) {
+            LOG(("offline cache is up to date, not updating"));
+            CloseOfflineCacheEntry();
+        }
+    }
+
+    // Check for a Content-Signature header and inject mediator if the header is
+    // requested and available.
+    // If requested (mLoadInfo->GetVerifySignedContent), but not present, or
+    // present but not valid, fail this channel and return
+    // NS_ERROR_INVALID_SIGNATURE to indicate a signature error and trigger a
+    // fallback load in nsDocShell.
+    // Note that OnStartRequest has already been called on the target stream
+    // listener at this point. We have to add the listener here that late to
+    // ensure that it's the last listener and can thus block the load in
+    // OnStopRequest.
+    if (!mCanceled) {
+        rv = ProcessContentSignatureHeader(mResponseHead);
+        if (NS_FAILED(rv)) {
+            LOG(("Content-signature verification failed.\n"));
+            return rv;
+        }
+    }
+
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::ProcessFailedProxyConnect(uint32_t httpStatus)
+{
+    // Failure to set up a proxy tunnel via CONNECT means one of the following:
+    // 1) Proxy wants authorization, or forbids.
+    // 2) DNS at proxy couldn't resolve target URL.
+    // 3) Proxy connection to target failed or timed out.
+    // 4) Eve intercepted our CONNECT, and is replying with malicious HTML.
+    //
+    // Our current architecture would parse the proxy's response content with
+    // the permission of the target URL.  Given #4, we must avoid rendering the
+    // body of the reply, and instead give the user a (hopefully helpful)
+    // boilerplate error page, based on just the HTTP status of the reply.
+
+    MOZ_ASSERT(mConnectionInfo->UsingConnect(),
+               "proxy connect failed but not using CONNECT?");
+    nsresult rv;
+    switch (httpStatus)
+    {
+    case 300: case 301: case 302: case 303: case 307: case 308:
+        // Bad redirect: not top-level, or it's a POST, bad/missing Location,
+        // or ProcessRedirect() failed for some other reason.  Legal
+        // redirects that fail because site not available, etc., are handled
+        // elsewhere, in the regular codepath.
+        rv = NS_ERROR_CONNECTION_REFUSED;
+        break;
+    case 403: // HTTP/1.1: "Forbidden"
+    case 407: // ProcessAuthentication() failed
+    case 501: // HTTP/1.1: "Not Implemented"
+        // user sees boilerplate Mozilla "Proxy Refused Connection" page.
+        rv = NS_ERROR_PROXY_CONNECTION_REFUSED;
+        break;
+    // Squid sends 404 if DNS fails (regular 404 from target is tunneled)
+    case 404: // HTTP/1.1: "Not Found"
+    // RFC 2616: "some deployed proxies are known to return 400 or 500 when
+    // DNS lookups time out."  (Squid uses 500 if it runs out of sockets: so
+    // we have a conflict here).
+    case 400: // HTTP/1.1 "Bad Request"
+    case 500: // HTTP/1.1: "Internal Server Error"
+        /* User sees: "Address Not Found: Firefox can't find the server at
+         * www.foo.com."
+         */
+        rv = NS_ERROR_UNKNOWN_HOST;
+        break;
+    case 502: // HTTP/1.1: "Bad Gateway" (invalid resp from target server)
+    // Squid returns 503 if target request fails for anything but DNS.
+    case 503: // HTTP/1.1: "Service Unavailable"
+        /* User sees: "Failed to Connect:
+         *  Firefox can't establish a connection to the server at
+         *  www.foo.com.  Though the site seems valid, the browser
+         *  was unable to establish a connection."
+         */
+        rv = NS_ERROR_CONNECTION_REFUSED;
+        break;
+    // RFC 2616 uses 504 for both DNS and target timeout, so not clear what to
+    // do here: picking target timeout, as DNS covered by 400/404/500
+    case 504: // HTTP/1.1: "Gateway Timeout"
+        // user sees: "Network Timeout: The server at www.foo.com
+        //              is taking too long to respond."
+        rv = NS_ERROR_NET_TIMEOUT;
+        break;
+    // Confused proxy server or malicious response
+    default:
+        rv = NS_ERROR_PROXY_CONNECTION_REFUSED;
+        break;
+    }
+    LOG(("Cancelling failed proxy CONNECT [this=%p httpStatus=%u]\n",
+         this, httpStatus));
+    Cancel(rv);
+    CallOnStartRequest();
+    return rv;
+}
+
+static void
+GetSTSConsoleErrorTag(uint32_t failureResult, nsAString& consoleErrorTag)
+{
+    switch (failureResult) {
+        case nsISiteSecurityService::ERROR_UNTRUSTWORTHY_CONNECTION:
+            consoleErrorTag = NS_LITERAL_STRING("STSUntrustworthyConnection");
+            break;
+        case nsISiteSecurityService::ERROR_COULD_NOT_PARSE_HEADER:
+            consoleErrorTag = NS_LITERAL_STRING("STSCouldNotParseHeader");
+            break;
+        case nsISiteSecurityService::ERROR_NO_MAX_AGE:
+            consoleErrorTag = NS_LITERAL_STRING("STSNoMaxAge");
+            break;
+        case nsISiteSecurityService::ERROR_MULTIPLE_MAX_AGES:
+            consoleErrorTag = NS_LITERAL_STRING("STSMultipleMaxAges");
+            break;
+        case nsISiteSecurityService::ERROR_INVALID_MAX_AGE:
+            consoleErrorTag = NS_LITERAL_STRING("STSInvalidMaxAge");
+            break;
+        case nsISiteSecurityService::ERROR_MULTIPLE_INCLUDE_SUBDOMAINS:
+            consoleErrorTag = NS_LITERAL_STRING("STSMultipleIncludeSubdomains");
+            break;
+        case nsISiteSecurityService::ERROR_INVALID_INCLUDE_SUBDOMAINS:
+            consoleErrorTag = NS_LITERAL_STRING("STSInvalidIncludeSubdomains");
+            break;
+        case nsISiteSecurityService::ERROR_COULD_NOT_SAVE_STATE:
+            consoleErrorTag = NS_LITERAL_STRING("STSCouldNotSaveState");
+            break;
+        default:
+            consoleErrorTag = NS_LITERAL_STRING("STSUnknownError");
+            break;
+    }
+}
+
+static void
+GetPKPConsoleErrorTag(uint32_t failureResult, nsAString& consoleErrorTag)
+{
+    switch (failureResult) {
+        case nsISiteSecurityService::ERROR_UNTRUSTWORTHY_CONNECTION:
+            consoleErrorTag = NS_LITERAL_STRING("PKPUntrustworthyConnection");
+            break;
+        case nsISiteSecurityService::ERROR_COULD_NOT_PARSE_HEADER:
+            consoleErrorTag = NS_LITERAL_STRING("PKPCouldNotParseHeader");
+            break;
+        case nsISiteSecurityService::ERROR_NO_MAX_AGE:
+            consoleErrorTag = NS_LITERAL_STRING("PKPNoMaxAge");
+            break;
+        case nsISiteSecurityService::ERROR_MULTIPLE_MAX_AGES:
+            consoleErrorTag = NS_LITERAL_STRING("PKPMultipleMaxAges");
+            break;
+        case nsISiteSecurityService::ERROR_INVALID_MAX_AGE:
+            consoleErrorTag = NS_LITERAL_STRING("PKPInvalidMaxAge");
+            break;
+        case nsISiteSecurityService::ERROR_MULTIPLE_INCLUDE_SUBDOMAINS:
+            consoleErrorTag = NS_LITERAL_STRING("PKPMultipleIncludeSubdomains");
+            break;
+        case nsISiteSecurityService::ERROR_INVALID_INCLUDE_SUBDOMAINS:
+            consoleErrorTag = NS_LITERAL_STRING("PKPInvalidIncludeSubdomains");
+            break;
+        case nsISiteSecurityService::ERROR_INVALID_PIN:
+            consoleErrorTag = NS_LITERAL_STRING("PKPInvalidPin");
+            break;
+        case nsISiteSecurityService::ERROR_MULTIPLE_REPORT_URIS:
+            consoleErrorTag = NS_LITERAL_STRING("PKPMultipleReportURIs");
+            break;
+        case nsISiteSecurityService::ERROR_PINSET_DOES_NOT_MATCH_CHAIN:
+            consoleErrorTag = NS_LITERAL_STRING("PKPPinsetDoesNotMatch");
+            break;
+        case nsISiteSecurityService::ERROR_NO_BACKUP_PIN:
+            consoleErrorTag = NS_LITERAL_STRING("PKPNoBackupPin");
+            break;
+        case nsISiteSecurityService::ERROR_COULD_NOT_SAVE_STATE:
+            consoleErrorTag = NS_LITERAL_STRING("PKPCouldNotSaveState");
+            break;
+        case nsISiteSecurityService::ERROR_ROOT_NOT_BUILT_IN:
+            consoleErrorTag = NS_LITERAL_STRING("PKPRootNotBuiltIn");
+            break;
+        default:
+            consoleErrorTag = NS_LITERAL_STRING("PKPUnknownError");
+            break;
+    }
+}
+
+/**
+ * Process a single security header. Only two types are supported: HSTS and HPKP.
+ */
+nsresult
+nsHttpChannel::ProcessSingleSecurityHeader(uint32_t aType,
+                                           nsISSLStatus *aSSLStatus,
+                                           uint32_t aFlags)
+{
+    nsHttpAtom atom;
+    switch (aType) {
+        case nsISiteSecurityService::HEADER_HSTS:
+            atom = nsHttp::ResolveAtom("Strict-Transport-Security");
+            break;
+        case nsISiteSecurityService::HEADER_HPKP:
+            atom = nsHttp::ResolveAtom("Public-Key-Pins");
+            break;
+        default:
+            NS_NOTREACHED("Invalid security header type");
+            return NS_ERROR_FAILURE;
+    }
+
+    nsAutoCString securityHeader;
+    nsresult rv = mResponseHead->GetHeader(atom, securityHeader);
+    if (NS_SUCCEEDED(rv)) {
+        nsISiteSecurityService* sss = gHttpHandler->GetSSService();
+        NS_ENSURE_TRUE(sss, NS_ERROR_OUT_OF_MEMORY);
+        // Process header will now discard the headers itself if the channel
+        // wasn't secure (whereas before it had to be checked manually)
+        uint32_t failureResult;
+        rv = sss->ProcessHeader(aType, mURI, securityHeader.get(), aSSLStatus,
+                                aFlags, nullptr, nullptr, &failureResult);
+        if (NS_FAILED(rv)) {
+            nsAutoString consoleErrorCategory;
+            nsAutoString consoleErrorTag;
+            switch (aType) {
+                case nsISiteSecurityService::HEADER_HSTS:
+                    GetSTSConsoleErrorTag(failureResult, consoleErrorTag);
+                    consoleErrorCategory = NS_LITERAL_STRING("Invalid HSTS Headers");
+                    break;
+                case nsISiteSecurityService::HEADER_HPKP:
+                    GetPKPConsoleErrorTag(failureResult, consoleErrorTag);
+                    consoleErrorCategory = NS_LITERAL_STRING("Invalid HPKP Headers");
+                    break;
+                default:
+                    return NS_ERROR_FAILURE;
+            }
+            AddSecurityMessage(consoleErrorTag, consoleErrorCategory);
+            LOG(("nsHttpChannel: Failed to parse %s header, continuing load.\n",
+                 atom.get()));
+        }
+    } else {
+        if (rv != NS_ERROR_NOT_AVAILABLE) {
+            // All other errors are fatal
+            NS_ENSURE_SUCCESS(rv, rv);
+        }
+        LOG(("nsHttpChannel: No %s header, continuing load.\n",
+             atom.get()));
+    }
+    return NS_OK;
+}
+
+/**
+ * Decide whether or not to remember Strict-Transport-Security, and whether
+ * or not to enforce channel integrity.
+ *
+ * @return NS_ERROR_FAILURE if there's security information missing even though
+ *             it's an HTTPS connection.
+ */
+nsresult
+nsHttpChannel::ProcessSecurityHeaders()
+{
+    nsresult rv;
+    bool isHttps = false;
+    rv = mURI->SchemeIs("https", &isHttps);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    // If this channel is not loading securely, STS or PKP doesn't do anything.
+    // In the case of HSTS, the upgrade to HTTPS takes place earlier in the
+    // channel load process.
+    if (!isHttps)
+        return NS_OK;
+
+    nsAutoCString asciiHost;
+    rv = mURI->GetAsciiHost(asciiHost);
+    NS_ENSURE_SUCCESS(rv, NS_OK);
+
+    // If the channel is not a hostname, but rather an IP, do not process STS
+    // or PKP headers
+    PRNetAddr hostAddr;
+    if (PR_SUCCESS == PR_StringToNetAddr(asciiHost.get(), &hostAddr))
+        return NS_OK;
+
+    // mSecurityInfo may not always be present, and if it's not then it is okay
+    // to just disregard any security headers since we know nothing about the
+    // security of the connection.
+    NS_ENSURE_TRUE(mSecurityInfo, NS_OK);
+
+    uint32_t flags =
+      NS_UsePrivateBrowsing(this) ? nsISocketProvider::NO_PERMANENT_STORAGE : 0;
+
+    // Get the SSLStatus
+    nsCOMPtr<nsISSLStatusProvider> sslprov = do_QueryInterface(mSecurityInfo);
+    NS_ENSURE_TRUE(sslprov, NS_ERROR_FAILURE);
+    nsCOMPtr<nsISSLStatus> sslStatus;
+    rv = sslprov->GetSSLStatus(getter_AddRefs(sslStatus));
+    NS_ENSURE_SUCCESS(rv, rv);
+    NS_ENSURE_TRUE(sslStatus, NS_ERROR_FAILURE);
+
+    rv = ProcessSingleSecurityHeader(nsISiteSecurityService::HEADER_HSTS,
+                                     sslStatus, flags);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = ProcessSingleSecurityHeader(nsISiteSecurityService::HEADER_HPKP,
+                                     sslStatus, flags);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::ProcessContentSignatureHeader(nsHttpResponseHead *aResponseHead)
+{
+    nsresult rv = NS_OK;
+
+    // we only do this if we require it in loadInfo
+    if (!mLoadInfo || !mLoadInfo->GetVerifySignedContent()) {
+        return NS_OK;
+    }
+
+    // check if we verify content signatures on this newtab channel
+    if (gHttpHandler->NewTabContentSignaturesDisabled()) {
+        return NS_OK;
+    }
+
+    NS_ENSURE_TRUE(aResponseHead, NS_ERROR_ABORT);
+    nsAutoCString contentSignatureHeader;
+    nsHttpAtom atom = nsHttp::ResolveAtom("Content-Signature");
+    rv = aResponseHead->GetHeader(atom, contentSignatureHeader);
+    if (NS_FAILED(rv)) {
+        LOG(("Content-Signature header is missing but expected."));
+        DoInvalidateCacheEntry(mURI);
+        return NS_ERROR_INVALID_SIGNATURE;
+    }
+
+    // if we require a signature but it is empty, fail
+    if (contentSignatureHeader.IsEmpty()) {
+      DoInvalidateCacheEntry(mURI);
+      LOG(("An expected content-signature header is missing.\n"));
+      return NS_ERROR_INVALID_SIGNATURE;
+    }
+
+    // we ensure a content type here to avoid running into problems with
+    // content sniffing, which might sniff parts of the content before we can
+    // verify the signature
+    if (!aResponseHead->HasContentType()) {
+        NS_WARNING("Empty content type can get us in trouble when verifying "
+                   "content signatures");
+        return NS_ERROR_INVALID_SIGNATURE;
+    }
+    // create a new listener that meadiates the content
+    RefPtr<ContentVerifier> contentVerifyingMediator =
+      new ContentVerifier(mListener, mListenerContext);
+    rv = contentVerifyingMediator->Init(contentSignatureHeader, this,
+                                        mListenerContext);
+    NS_ENSURE_SUCCESS(rv, NS_ERROR_INVALID_SIGNATURE);
+    mListener = contentVerifyingMediator;
+
+    return NS_OK;
+}
+
+/**
+ * Decide whether or not to send a security report and, if so, give the
+ * SecurityReporter the information required to send such a report.
+ */
+void
+nsHttpChannel::ProcessSecurityReport(nsresult status) {
+    uint32_t errorClass;
+    nsCOMPtr<nsINSSErrorsService> errSvc =
+            do_GetService("@mozilla.org/nss_errors_service;1");
+    // getErrorClass will throw a generic NS_ERROR_FAILURE if the error code is
+    // not in the set of errors covered by the NSS errors service.
+    nsresult rv = errSvc->GetErrorClass(status, &errorClass);
+    if (!NS_SUCCEEDED(rv)) {
+        return;
+    }
+
+    // if the content was not loaded succesfully and we have security info,
+    // send a TLS error report - we must do this early as other parts of
+    // OnStopRequest can return early
+    bool reportingEnabled =
+            Preferences::GetBool("security.ssl.errorReporting.enabled");
+    bool reportingAutomatic =
+            Preferences::GetBool("security.ssl.errorReporting.automatic");
+    if (!mSecurityInfo || !reportingEnabled || !reportingAutomatic) {
+        return;
+    }
+
+    nsCOMPtr<nsITransportSecurityInfo> secInfo =
+            do_QueryInterface(mSecurityInfo);
+    nsCOMPtr<nsISecurityReporter> errorReporter =
+            do_GetService("@mozilla.org/securityreporter;1");
+
+    if (!secInfo || !mURI) {
+        return;
+    }
+
+    nsAutoCString hostStr;
+    int32_t port;
+    rv = mURI->GetHost(hostStr);
+    if (!NS_SUCCEEDED(rv)) {
+        return;
+    }
+
+    rv = mURI->GetPort(&port);
+
+    if (NS_SUCCEEDED(rv)) {
+        errorReporter->ReportTLSError(secInfo, hostStr, port);
+    }
+}
+
+bool
+nsHttpChannel::IsHTTPS()
+{
+    bool isHttps;
+    if (NS_FAILED(mURI->SchemeIs("https", &isHttps)) || !isHttps)
+        return false;
+    return true;
+}
+
+void
+nsHttpChannel::ProcessSSLInformation()
+{
+    // If this is HTTPS, record any use of RSA so that Key Exchange Algorithm
+    // can be whitelisted for TLS False Start in future sessions. We could
+    // do the same for DH but its rarity doesn't justify the lookup.
+
+    if (mCanceled || NS_FAILED(mStatus) || !mSecurityInfo ||
+        !IsHTTPS() || mPrivateBrowsing)
+        return;
+
+    nsCOMPtr<nsISSLStatusProvider> statusProvider =
+        do_QueryInterface(mSecurityInfo);
+    if (!statusProvider)
+        return;
+    nsCOMPtr<nsISSLStatus> sslstat;
+    statusProvider->GetSSLStatus(getter_AddRefs(sslstat));
+    if (!sslstat)
+        return;
+
+    nsCOMPtr<nsITransportSecurityInfo> securityInfo =
+        do_QueryInterface(mSecurityInfo);
+    uint32_t state;
+    if (securityInfo &&
+        NS_SUCCEEDED(securityInfo->GetSecurityState(&state)) &&
+        (state & nsIWebProgressListener::STATE_IS_BROKEN)) {
+        // Send weak crypto warnings to the web console
+        if (state & nsIWebProgressListener::STATE_USES_WEAK_CRYPTO) {
+            nsString consoleErrorTag = NS_LITERAL_STRING("WeakCipherSuiteWarning");
+            nsString consoleErrorCategory = NS_LITERAL_STRING("SSL");
+            AddSecurityMessage(consoleErrorTag, consoleErrorCategory);
+        }
+    }
+
+    // Send (SHA-1) signature algorithm errors to the web console
+    nsCOMPtr<nsIX509Cert> cert;
+    sslstat->GetServerCert(getter_AddRefs(cert));
+    if (cert) {
+        UniqueCERTCertificate nssCert(cert->GetCert());
+        if (nssCert) {
+            SECOidTag tag = SECOID_GetAlgorithmTag(&nssCert->signature);
+            LOG(("Checking certificate signature: The OID tag is %i [this=%p]\n", tag, this));
+            // Check to see if the signature is sha-1 based.
+            // Not including checks for SEC_OID_ISO_SHA1_WITH_RSA_SIGNATURE
+            // from http://tools.ietf.org/html/rfc2437#section-8 since I
+            // can't see reference to it outside this spec
+            if (tag == SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION ||
+                tag == SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST ||
+                tag == SEC_OID_ANSIX962_ECDSA_SHA1_SIGNATURE) {
+                nsString consoleErrorTag = NS_LITERAL_STRING("SHA1Sig");
+                nsString consoleErrorMessage
+                        = NS_LITERAL_STRING("SHA-1 Signature");
+                AddSecurityMessage(consoleErrorTag, consoleErrorMessage);
+            }
+        }
+    }
+}
+
+void
+nsHttpChannel::ProcessAltService()
+{
+    // e.g. Alt-Svc: h2=":443"; ma=60
+    // e.g. Alt-Svc: h2="otherhost:443"
+    // Alt-Svc       = 1#( alternative *( OWS ";" OWS parameter ) )
+    // alternative   = protocol-id "=" alt-authority
+    // protocol-id   = token ; percent-encoded ALPN protocol identifier
+    // alt-authority = quoted-string ;  containing [ uri-host ] ":" port
+
+    if (!mAllowAltSvc) { // per channel opt out
+        return;
+    }
+
+    if (!gHttpHandler->AllowAltSvc() || (mCaps & NS_HTTP_DISALLOW_SPDY)) {
+        return;
+    }
+
+    nsAutoCString scheme;
+    mURI->GetScheme(scheme);
+    bool isHttp = scheme.Equals(NS_LITERAL_CSTRING("http"));
+    if (!isHttp && !scheme.Equals(NS_LITERAL_CSTRING("https"))) {
+        return;
+    }
+
+    nsAutoCString altSvc;
+    mResponseHead->GetHeader(nsHttp::Alternate_Service, altSvc);
+    if (altSvc.IsEmpty()) {
+        return;
+    }
+
+    if (!nsHttp::IsReasonableHeaderValue(altSvc)) {
+        LOG(("Alt-Svc Response Header seems unreasonable - skipping\n"));
+        return;
+    }
+
+    nsAutoCString originHost;
+    int32_t originPort = 80;
+    mURI->GetPort(&originPort);
+    if (NS_FAILED(mURI->GetHost(originHost))) {
+        return;
+    }
+
+    nsCOMPtr<nsIInterfaceRequestor> callbacks;
+    nsCOMPtr<nsProxyInfo> proxyInfo;
+    NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
+                                           getter_AddRefs(callbacks));
+    if (mProxyInfo) {
+        proxyInfo = do_QueryInterface(mProxyInfo);
+    }
+
+    NeckoOriginAttributes originAttributes;
+    NS_GetOriginAttributes(this, originAttributes);
+
+    AltSvcMapping::ProcessHeader(altSvc, scheme, originHost, originPort,
+                                 mUsername, mPrivateBrowsing, callbacks, proxyInfo,
+                                 mCaps & NS_HTTP_DISALLOW_SPDY,
+                                 originAttributes);
+}
+
+nsresult
+nsHttpChannel::ProcessResponse()
+{
+    uint32_t httpStatus = mResponseHead->Status();
+
+    LOG(("nsHttpChannel::ProcessResponse [this=%p httpStatus=%u]\n",
+        this, httpStatus));
+
+    // do some telemetry
+    if (gHttpHandler->IsTelemetryEnabled()) {
+        // Gather data on whether the transaction and page (if this is
+        // the initial page load) is being loaded with SSL.
+        Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_IS_SSL,
+                              mConnectionInfo->EndToEndSSL());
+        if (mLoadFlags & LOAD_INITIAL_DOCUMENT_URI) {
+            Telemetry::Accumulate(Telemetry::HTTP_PAGELOAD_IS_SSL,
+                                  mConnectionInfo->EndToEndSSL());
+        }
+
+        // how often do we see something like Alternate-Protocol: "443:quic,p=1"
+        nsAutoCString alt_protocol;
+        mResponseHead->GetHeader(nsHttp::Alternate_Protocol, alt_protocol);
+        bool saw_quic = (!alt_protocol.IsEmpty() &&
+                         PL_strstr(alt_protocol.get(), "quic")) ? 1 : 0;
+        Telemetry::Accumulate(Telemetry::HTTP_SAW_QUIC_ALT_PROTOCOL, saw_quic);
+
+        // Gather data on how many URLS get redirected
+        switch (httpStatus) {
+            case 200:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 0);
+                break;
+            case 301:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 1);
+                break;
+            case 302:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 2);
+                break;
+            case 304:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 3);
+                break;
+            case 307:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 4);
+                break;
+            case 308:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 5);
+                break;
+            case 400:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 6);
+                break;
+            case 401:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 7);
+                break;
+            case 403:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 8);
+                break;
+            case 404:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 9);
+                break;
+            case 500:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 10);
+                break;
+            default:
+                Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 11);
+                break;
+        }
+    }
+
+    // Let the predictor know whether this was a cacheable response or not so
+    // that it knows whether or not to possibly prefetch this resource in the
+    // future.
+    // We use GetReferringPage because mReferrer may not be set at all, or may
+    // not be a full URI (HttpBaseChannel::SetReferrer has the gorey details).
+    // If that's null, though, we'll fall back to mReferrer just in case (this
+    // is especially useful in xpcshell tests, where we don't have an actual
+    // pageload to get a referrer from).
+    nsCOMPtr<nsIURI> referrer = GetReferringPage();
+    if (!referrer) {
+        referrer = mReferrer;
+    }
+    if (referrer) {
+        nsCOMPtr<nsILoadContextInfo> lci = GetLoadContextInfo(this);
+        mozilla::net::Predictor::UpdateCacheability(referrer, mURI, httpStatus,
+                                                    mRequestHead, mResponseHead,
+                                                    lci);
+    }
+
+    if (mTransaction->ProxyConnectFailed()) {
+        // Only allow 407 (authentication required) to continue
+        if (httpStatus != 407)
+            return ProcessFailedProxyConnect(httpStatus);
+        // If proxy CONNECT response needs to complete, wait to process connection
+        // for Strict-Transport-Security.
+    } else {
+        // Given a successful connection, process any STS or PKP data that's
+        // relevant.
+        DebugOnly<nsresult> rv = ProcessSecurityHeaders();
+        MOZ_ASSERT(NS_SUCCEEDED(rv), "ProcessSTSHeader failed, continuing load.");
+    }
+
+    MOZ_ASSERT(!mCachedContentIsValid);
+
+    ProcessSSLInformation();
+
+    // notify "http-on-examine-response" observers
+    gHttpHandler->OnExamineResponse(this);
+
+    return ContinueProcessResponse1();
+}
+
+void
+nsHttpChannel::AsyncContinueProcessResponse()
+{
+    nsresult rv;
+    rv = ContinueProcessResponse1();
+    if (NS_FAILED(rv)) {
+        // A synchronous failure here would normally be passed as the return
+        // value from OnStartRequest, which would in turn cancel the request.
+        // If we're continuing asynchronously, we need to cancel the request
+        // ourselves.
+        Unused << Cancel(rv);
+    }
+}
+
+nsresult
+nsHttpChannel::ContinueProcessResponse1()
+{
+    NS_PRECONDITION(!mCallOnResume, "How did that happen?");
+    nsresult rv;
+
+    if (mSuspendCount) {
+        LOG(("Waiting until resume to finish processing response [this=%p]\n", this));
+        mCallOnResume = &nsHttpChannel::AsyncContinueProcessResponse;
+        return NS_OK;
+    }
+
+    uint32_t httpStatus = mResponseHead->Status();
+
+    // Cookies and Alt-Service should not be handled on proxy failure either.
+    // This would be consolidated with ProcessSecurityHeaders but it should
+    // happen after OnExamineResponse.
+    if (!mTransaction->ProxyConnectFailed() && (httpStatus != 407)) {
+        nsAutoCString cookie;
+        if (NS_SUCCEEDED(mResponseHead->GetHeader(nsHttp::Set_Cookie, cookie))) {
+            SetCookie(cookie.get());
+        }
+        if ((httpStatus < 500) && (httpStatus != 421)) {
+            ProcessAltService();
+        }
+    }
+
+    if (mConcurrentCacheAccess && mCachedContentIsPartial && httpStatus != 206) {
+        LOG(("  only expecting 206 when doing partial request during "
+             "interrupted cache concurrent read"));
+        return NS_ERROR_CORRUPTED_CONTENT;
+    }
+
+    // handle unused username and password in url (see bug 232567)
+    if (httpStatus != 401 && httpStatus != 407) {
+        if (!mAuthRetryPending)
+            mAuthProvider->CheckForSuperfluousAuth();
+        if (mCanceled)
+            return CallOnStartRequest();
+
+        // reset the authentication's current continuation state because our
+        // last authentication attempt has been completed successfully
+        mAuthProvider->Disconnect(NS_ERROR_ABORT);
+        mAuthProvider = nullptr;
+        LOG(("  continuation state has been reset"));
+    }
+
+    if (mAPIRedirectToURI && !mCanceled) {
+        MOZ_ASSERT(!mOnStartRequestCalled);
+        nsCOMPtr<nsIURI> redirectTo;
+        mAPIRedirectToURI.swap(redirectTo);
+
+        PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessResponse2);
+        rv = StartRedirectChannelToURI(redirectTo, nsIChannelEventSink::REDIRECT_TEMPORARY);
+        if (NS_SUCCEEDED(rv)) {
+            return NS_OK;
+        }
+        PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessResponse2);
+    }
+
+    // Hack: ContinueProcessResponse2 uses NS_OK to detect successful
+    // redirects, so we distinguish this codepath (a non-redirect that's
+    // processing normally) by passing in a bogus error code.
+    return ContinueProcessResponse2(NS_BINDING_FAILED);
+}
+
+nsresult
+nsHttpChannel::ContinueProcessResponse2(nsresult rv)
+{
+    if (NS_SUCCEEDED(rv)) {
+        // redirectTo() has passed through, we don't want to go on with
+        // this channel.  It will now be canceled by the redirect handling
+        // code that called this function.
+        return NS_OK;
+    }
+
+    rv = NS_OK;
+
+    uint32_t httpStatus = mResponseHead->Status();
+
+    bool successfulReval = false;
+
+    // handle different server response categories.  Note that we handle
+    // caching or not caching of error pages in
+    // nsHttpResponseHead::MustValidate; if you change this switch, update that
+    // one
+    switch (httpStatus) {
+    case 200:
+    case 203:
+        // Per RFC 2616, 14.35.2, "A server MAY ignore the Range header".
+        // So if a server does that and sends 200 instead of 206 that we
+        // expect, notify our caller.
+        // However, if we wanted to start from the beginning, let it go through
+        if (mResuming && mStartPos != 0) {
+            LOG(("Server ignored our Range header, cancelling [this=%p]\n", this));
+            Cancel(NS_ERROR_NOT_RESUMABLE);
+            rv = CallOnStartRequest();
+            break;
+        }
+        // these can normally be cached
+        rv = ProcessNormal();
+        MaybeInvalidateCacheEntryForSubsequentGet();
+        break;
+    case 206:
+        if (mCachedContentIsPartial) // an internal byte range request...
+            rv = ProcessPartialContent();
+        else {
+            mCacheInputStream.CloseAndRelease();
+            rv = ProcessNormal();
+        }
+        break;
+    case 300:
+    case 301:
+    case 302:
+    case 307:
+    case 308:
+    case 303:
+#if 0
+    case 305: // disabled as a security measure (see bug 187996).
+#endif
+        // don't store the response body for redirects
+        MaybeInvalidateCacheEntryForSubsequentGet();
+        PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessResponse3);
+        rv = AsyncProcessRedirection(httpStatus);
+        if (NS_FAILED(rv)) {
+            PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessResponse3);
+            LOG(("AsyncProcessRedirection failed [rv=%x]\n", rv));
+            // don't cache failed redirect responses.
+            if (mCacheEntry)
+                mCacheEntry->AsyncDoom(nullptr);
+            if (DoNotRender3xxBody(rv)) {
+                mStatus = rv;
+                DoNotifyListener();
+            } else {
+                rv = ContinueProcessResponse3(rv);
+            }
+        }
+        break;
+    case 304:
+        if (!ShouldBypassProcessNotModified()) {
+            rv = ProcessNotModified();
+            if (NS_SUCCEEDED(rv)) {
+                successfulReval = true;
+                break;
+            }
+
+            LOG(("ProcessNotModified failed [rv=%x]\n", rv));
+
+            // We cannot read from the cache entry, it might be in an
+            // incosistent state.  Doom it and redirect the channel
+            // to the same URI to reload from the network.
+            mCacheInputStream.CloseAndRelease();
+            if (mCacheEntry) {
+                mCacheEntry->AsyncDoom(nullptr);
+                mCacheEntry = nullptr;
+            }
+
+            rv = StartRedirectChannelToURI(mURI, nsIChannelEventSink::REDIRECT_INTERNAL);
+            if (NS_SUCCEEDED(rv)) {
+                return NS_OK;
+            }
+        }
+
+        if (ShouldBypassProcessNotModified() || NS_FAILED(rv)) {
+            rv = ProcessNormal();
+        }
+        break;
+    case 401:
+    case 407:
+        if (MOZ_UNLIKELY(mCustomAuthHeader) && httpStatus == 401) {
+            // When a custom auth header fails, we don't want to try
+            // any cached credentials, nor we want to ask the user.
+            // It's up to the consumer to re-try w/o setting a custom
+            // auth header if cached credentials should be attempted.
+            rv = NS_ERROR_FAILURE;
+        } else {
+            rv = mAuthProvider->ProcessAuthentication(
+                httpStatus,
+                mConnectionInfo->EndToEndSSL() && mTransaction->ProxyConnectFailed());
+        }
+        if (rv == NS_ERROR_IN_PROGRESS)  {
+            // authentication prompt has been invoked and result
+            // is expected asynchronously
+            mAuthRetryPending = true;
+            if (httpStatus == 407 || mTransaction->ProxyConnectFailed())
+                mProxyAuthPending = true;
+
+            // suspend the transaction pump to stop receiving the
+            // unauthenticated content data. We will throw that data
+            // away when user provides credentials or resume the pump
+            // when user refuses to authenticate.
+            LOG(("Suspending the transaction, asynchronously prompting for credentials"));
+            mTransactionPump->Suspend();
+            rv = NS_OK;
+        } else if (NS_FAILED(rv)) {
+            LOG(("ProcessAuthentication failed [rv=%x]\n", rv));
+            if (mTransaction->ProxyConnectFailed())
+                return ProcessFailedProxyConnect(httpStatus);
+            if (!mAuthRetryPending)
+                mAuthProvider->CheckForSuperfluousAuth();
+            rv = ProcessNormal();
+        } else {
+            mAuthRetryPending = true; // see DoAuthRetry
+        }
+        break;
+    default:
+        rv = ProcessNormal();
+        MaybeInvalidateCacheEntryForSubsequentGet();
+        break;
+    }
+
+    if (gHttpHandler->IsTelemetryEnabled()) {
+        CacheDisposition cacheDisposition;
+        if (!mDidReval) {
+            cacheDisposition = kCacheMissed;
+        } else if (successfulReval) {
+            cacheDisposition = kCacheHitViaReval;
+        } else {
+            cacheDisposition = kCacheMissedViaReval;
+        }
+        AccumulateCacheHitTelemetry(cacheDisposition);
+
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_VERSION,
+                              mResponseHead->Version());
+
+        if (mResponseHead->Version() == NS_HTTP_VERSION_0_9) {
+            // DefaultPortTopLevel = 0, DefaultPortSubResource = 1,
+            // NonDefaultPortTopLevel = 2, NonDefaultPortSubResource = 3
+            uint32_t v09Info = 0;
+            if (!(mLoadFlags & LOAD_INITIAL_DOCUMENT_URI)) {
+                v09Info += 1;
+            }
+            if (mConnectionInfo->OriginPort() != mConnectionInfo->DefaultPort()) {
+                v09Info += 2;
+            }
+            Telemetry::Accumulate(Telemetry::HTTP_09_INFO, v09Info);
+        }
+    }
+    return rv;
+}
+
+nsresult
+nsHttpChannel::ContinueProcessResponse3(nsresult rv)
+{
+    bool doNotRender = DoNotRender3xxBody(rv);
+
+    if (rv == NS_ERROR_DOM_BAD_URI && mRedirectURI) {
+        bool isHTTP = false;
+        if (NS_FAILED(mRedirectURI->SchemeIs("http", &isHTTP)))
+            isHTTP = false;
+        if (!isHTTP && NS_FAILED(mRedirectURI->SchemeIs("https", &isHTTP)))
+            isHTTP = false;
+
+        if (!isHTTP) {
+            // This was a blocked attempt to redirect and subvert the system by
+            // redirecting to another protocol (perhaps javascript:)
+            // In that case we want to throw an error instead of displaying the
+            // non-redirected response body.
+            LOG(("ContinueProcessResponse3 detected rejected Non-HTTP Redirection"));
+            doNotRender = true;
+            rv = NS_ERROR_CORRUPTED_CONTENT;
+        }
+    }
+
+    if (doNotRender) {
+        Cancel(rv);
+        DoNotifyListener();
+        return rv;
+    }
+
+    if (NS_SUCCEEDED(rv)) {
+        UpdateInhibitPersistentCachingFlag();
+
+        InitCacheEntry();
+        CloseCacheEntry(false);
+
+        if (mApplicationCacheForWrite) {
+            // Store response in the offline cache
+            InitOfflineCacheEntry();
+            CloseOfflineCacheEntry();
+        }
+        return NS_OK;
+    }
+
+    LOG(("ContinueProcessResponse3 got failure result [rv=%x]\n", rv));
+    if (mTransaction && mTransaction->ProxyConnectFailed()) {
+        return ProcessFailedProxyConnect(mRedirectType);
+    }
+    return ProcessNormal();
+}
+
+nsresult
+nsHttpChannel::ProcessNormal()
+{
+    nsresult rv;
+
+    LOG(("nsHttpChannel::ProcessNormal [this=%p]\n", this));
+
+    bool succeeded;
+    rv = GetRequestSucceeded(&succeeded);
+    if (NS_SUCCEEDED(rv) && !succeeded) {
+        PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessNormal);
+        bool waitingForRedirectCallback;
+        (void)ProcessFallback(&waitingForRedirectCallback);
+        if (waitingForRedirectCallback) {
+            // The transaction has been suspended by ProcessFallback.
+            return NS_OK;
+        }
+        PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessNormal);
+    }
+
+    return ContinueProcessNormal(NS_OK);
+}
+
+nsresult
+nsHttpChannel::ContinueProcessNormal(nsresult rv)
+{
+    if (NS_FAILED(rv)) {
+        // Fill the failure status here, we have failed to fall back, thus we
+        // have to report our status as failed.
+        mStatus = rv;
+        DoNotifyListener();
+        return rv;
+    }
+
+    if (mFallingBack) {
+        // Do not continue with normal processing, fallback is in
+        // progress now.
+        return NS_OK;
+    }
+
+    // if we're here, then any byte-range requests failed to result in a partial
+    // response.  we must clear this flag to prevent BufferPartialContent from
+    // being called inside our OnDataAvailable (see bug 136678).
+    mCachedContentIsPartial = false;
+
+    ClearBogusContentEncodingIfNeeded();
+
+    UpdateInhibitPersistentCachingFlag();
+
+    // this must be called before firing OnStartRequest, since http clients,
+    // such as imagelib, expect our cache entry to already have the correct
+    // expiration time (bug 87710).
+    if (mCacheEntry) {
+        rv = InitCacheEntry();
+        if (NS_FAILED(rv))
+            CloseCacheEntry(true);
+    }
+
+    // Check that the server sent us what we were asking for
+    if (mResuming) {
+        // Create an entity id from the response
+        nsAutoCString id;
+        rv = GetEntityID(id);
+        if (NS_FAILED(rv)) {
+            // If creating an entity id is not possible -> error
+            Cancel(NS_ERROR_NOT_RESUMABLE);
+        }
+        else if (mResponseHead->Status() != 206 &&
+                 mResponseHead->Status() != 200) {
+            // Probably 404 Not Found, 412 Precondition Failed or
+            // 416 Invalid Range -> error
+            LOG(("Unexpected response status while resuming, aborting [this=%p]\n",
+                 this));
+            Cancel(NS_ERROR_ENTITY_CHANGED);
+        }
+        // If we were passed an entity id, verify it's equal to the server's
+        else if (!mEntityID.IsEmpty()) {
+            if (!mEntityID.Equals(id)) {
+                LOG(("Entity mismatch, expected '%s', got '%s', aborting [this=%p]",
+                     mEntityID.get(), id.get(), this));
+                Cancel(NS_ERROR_ENTITY_CHANGED);
+            }
+        }
+    }
+
+    rv = CallOnStartRequest();
+    if (NS_FAILED(rv)) return rv;
+
+    // install cache listener if we still have a cache entry open
+    if (mCacheEntry && !mCacheEntryIsReadOnly) {
+        rv = InstallCacheListener();
+        if (NS_FAILED(rv)) return rv;
+    }
+
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::PromptTempRedirect()
+{
+    if (!gHttpHandler->PromptTempRedirect()) {
+        return NS_OK;
+    }
+    nsresult rv;
+    nsCOMPtr<nsIStringBundleService> bundleService =
+            do_GetService(NS_STRINGBUNDLE_CONTRACTID, &rv);
+    if (NS_FAILED(rv)) return rv;
+
+    nsCOMPtr<nsIStringBundle> stringBundle;
+    rv = bundleService->CreateBundle(NECKO_MSGS_URL, getter_AddRefs(stringBundle));
+    if (NS_FAILED(rv)) return rv;
+
+    nsXPIDLString messageString;
+    rv = stringBundle->GetStringFromName(u"RepostFormData", getter_Copies(messageString));
+    // GetStringFromName can return NS_OK and nullptr messageString.
+    if (NS_SUCCEEDED(rv) && messageString) {
+        bool repost = false;
+
+        nsCOMPtr<nsIPrompt> prompt;
+        GetCallback(prompt);
+        if (!prompt)
+            return NS_ERROR_NO_INTERFACE;
+
+        prompt->Confirm(nullptr, messageString, &repost);
+        if (!repost)
+            return NS_ERROR_FAILURE;
+    }
+
+    return rv;
+}
+
+nsresult
+nsHttpChannel::ProxyFailover()
+{
+    LOG(("nsHttpChannel::ProxyFailover [this=%p]\n", this));
+
+    nsresult rv;
+
+    nsCOMPtr<nsIProtocolProxyService> pps =
+            do_GetService(NS_PROTOCOLPROXYSERVICE_CONTRACTID, &rv);
+    if (NS_FAILED(rv))
+        return rv;
+
+    nsCOMPtr<nsIProxyInfo> pi;
+    rv = pps->GetFailoverForProxy(mConnectionInfo->ProxyInfo(), mURI, mStatus,
+                                  getter_AddRefs(pi));
+    if (NS_FAILED(rv))
+        return rv;
+
+    // XXXbz so where does this codepath remove us from the loadgroup,
+    // exactly?
+    return AsyncDoReplaceWithProxy(pi);
+}
+
+void
+nsHttpChannel::HandleAsyncRedirectChannelToHttps()
+{
+    NS_PRECONDITION(!mCallOnResume, "How did that happen?");
+
+    if (mSuspendCount) {
+        LOG(("Waiting until resume to do async redirect to https [this=%p]\n", this));
+        mCallOnResume = &nsHttpChannel::HandleAsyncRedirectChannelToHttps;
+        return;
+    }
+
+    nsresult rv = StartRedirectChannelToHttps();
+    if (NS_FAILED(rv))
+        ContinueAsyncRedirectChannelToURI(rv);
+}
+
+nsresult
+nsHttpChannel::StartRedirectChannelToHttps()
+{
+    LOG(("nsHttpChannel::HandleAsyncRedirectChannelToHttps() [STS]\n"));
+
+    nsCOMPtr<nsIURI> upgradedURI;
+    nsresult rv = NS_GetSecureUpgradedURI(mURI, getter_AddRefs(upgradedURI));
+    NS_ENSURE_SUCCESS(rv,rv);
+
+    return StartRedirectChannelToURI(upgradedURI,
+                                     nsIChannelEventSink::REDIRECT_PERMANENT |
+                                     nsIChannelEventSink::REDIRECT_STS_UPGRADE);
+}
+
+void
+nsHttpChannel::HandleAsyncAPIRedirect()
+{
+    NS_PRECONDITION(!mCallOnResume, "How did that happen?");
+    NS_PRECONDITION(mAPIRedirectToURI, "How did that happen?");
+
+    if (mSuspendCount) {
+        LOG(("Waiting until resume to do async API redirect [this=%p]\n", this));
+        mCallOnResume = &nsHttpChannel::HandleAsyncAPIRedirect;
+        return;
+    }
+
+    nsresult rv = StartRedirectChannelToURI(mAPIRedirectToURI,
+                                            nsIChannelEventSink::REDIRECT_PERMANENT);
+    if (NS_FAILED(rv))
+        ContinueAsyncRedirectChannelToURI(rv);
+
+    return;
+}
+
+nsresult
+nsHttpChannel::StartRedirectChannelToURI(nsIURI *upgradedURI, uint32_t flags)
+{
+    nsresult rv = NS_OK;
+    LOG(("nsHttpChannel::StartRedirectChannelToURI()\n"));
+
+    nsCOMPtr<nsIChannel> newChannel;
+
+    nsCOMPtr<nsIIOService> ioService;
+    rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = NS_NewChannelInternal(getter_AddRefs(newChannel),
+                               upgradedURI,
+                               mLoadInfo,
+                               nullptr, // aLoadGroup
+                               nullptr, // aCallbacks
+                               nsIRequest::LOAD_NORMAL,
+                               ioService);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = SetupReplacementChannel(upgradedURI, newChannel, true, flags);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    // Inform consumers about this fake redirect
+    mRedirectChannel = newChannel;
+
+    if (!(flags & nsIChannelEventSink::REDIRECT_STS_UPGRADE) &&
+        mInterceptCache == INTERCEPTED) {
+        // Mark the channel as intercepted in order to propagate the response URL.
+        nsCOMPtr<nsIHttpChannelInternal> httpRedirect = do_QueryInterface(mRedirectChannel);
+        if (httpRedirect) {
+            httpRedirect->ForceIntercepted(mInterceptionID);
+        }
+    }
+
+    PushRedirectAsyncFunc(
+        &nsHttpChannel::ContinueAsyncRedirectChannelToURI);
+    rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, flags);
+
+    if (NS_SUCCEEDED(rv))
+        rv = WaitForRedirectCallback();
+
+    if (NS_FAILED(rv)) {
+        AutoRedirectVetoNotifier notifier(this);
+
+        /* Remove the async call to ContinueAsyncRedirectChannelToURI().
+         * It is called directly by our callers upon return (to clean up
+         * the failed redirect). */
+        PopRedirectAsyncFunc(
+            &nsHttpChannel::ContinueAsyncRedirectChannelToURI);
+    }
+
+    return rv;
+}
+
+nsresult
+nsHttpChannel::ContinueAsyncRedirectChannelToURI(nsresult rv)
+{
+    // Since we handle mAPIRedirectToURI also after on-examine-response handler
+    // rather drop it here to avoid any redirect loops, even just hypothetical.
+    mAPIRedirectToURI = nullptr;
+
+    if (NS_SUCCEEDED(rv)) {
+        rv = OpenRedirectChannel(rv);
+    }
+
+    if (NS_FAILED(rv)) {
+        // Fill the failure status here, the update to https had been vetoed
+        // but from the security reasons we have to discard the whole channel
+        // load.
+        mStatus = rv;
+    }
+
+    if (mLoadGroup) {
+        mLoadGroup->RemoveRequest(this, nullptr, mStatus);
+    }
+
+    if (NS_FAILED(rv)) {
+        // We have to manually notify the listener because there is not any pump
+        // that would call our OnStart/StopRequest after resume from waiting for
+        // the redirect callback.
+        DoNotifyListener();
+    }
+
+    return rv;
+}
+
+nsresult
+nsHttpChannel::OpenRedirectChannel(nsresult rv)
+{
+    AutoRedirectVetoNotifier notifier(this);
+
+    // Make sure to do this after we received redirect veto answer,
+    // i.e. after all sinks had been notified
+    mRedirectChannel->SetOriginalURI(mOriginalURI);
+
+    // And now, notify observers the deprecated way
+    nsCOMPtr<nsIHttpEventSink> httpEventSink;
+    GetCallback(httpEventSink);
+    if (httpEventSink) {
+        // NOTE: nsIHttpEventSink is only used for compatibility with pre-1.8
+        // versions.
+        rv = httpEventSink->OnRedirect(this, mRedirectChannel);
+        if (NS_FAILED(rv)) {
+            return rv;
+        }
+    }
+
+    // open new channel
+    if (mLoadInfo && mLoadInfo->GetEnforceSecurity()) {
+        MOZ_ASSERT(!mListenerContext, "mListenerContext should be null!");
+        rv = mRedirectChannel->AsyncOpen2(mListener);
+    }
+    else {
+        rv = mRedirectChannel->AsyncOpen(mListener, mListenerContext);
+    }
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    mStatus = NS_BINDING_REDIRECTED;
+
+    notifier.RedirectSucceeded();
+
+    ReleaseListeners();
+
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::AsyncDoReplaceWithProxy(nsIProxyInfo* pi)
+{
+    LOG(("nsHttpChannel::AsyncDoReplaceWithProxy [this=%p pi=%p]", this, pi));
+    nsresult rv;
+
+    nsCOMPtr<nsIChannel> newChannel;
+    rv = gHttpHandler->NewProxiedChannel2(mURI, pi, mProxyResolveFlags,
+                                          mProxyURI, mLoadInfo,
+                                          getter_AddRefs(newChannel));
+    if (NS_FAILED(rv))
+        return rv;
+
+    uint32_t flags = nsIChannelEventSink::REDIRECT_INTERNAL;
+
+    rv = SetupReplacementChannel(mURI, newChannel, true, flags);
+    if (NS_FAILED(rv))
+        return rv;
+
+    // Inform consumers about this fake redirect
+    mRedirectChannel = newChannel;
+
+    PushRedirectAsyncFunc(&nsHttpChannel::ContinueDoReplaceWithProxy);
+    rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, flags);
+
+    if (NS_SUCCEEDED(rv))
+        rv = WaitForRedirectCallback();
+
+    if (NS_FAILED(rv)) {
+        AutoRedirectVetoNotifier notifier(this);
+        PopRedirectAsyncFunc(&nsHttpChannel::ContinueDoReplaceWithProxy);
+    }
+
+    return rv;
+}
+
+nsresult
+nsHttpChannel::ContinueDoReplaceWithProxy(nsresult rv)
+{
+    AutoRedirectVetoNotifier notifier(this);
+
+    if (NS_FAILED(rv))
+        return rv;
+
+    NS_PRECONDITION(mRedirectChannel, "No redirect channel?");
+
+    // Make sure to do this after we received redirect veto answer,
+    // i.e. after all sinks had been notified
+    mRedirectChannel->SetOriginalURI(mOriginalURI);
+
+    // open new channel
+    if (mLoadInfo && mLoadInfo->GetEnforceSecurity()) {
+        MOZ_ASSERT(!mListenerContext, "mListenerContext should be null!");
+        rv = mRedirectChannel->AsyncOpen2(mListener);
+    }
+    else {
+        rv = mRedirectChannel->AsyncOpen(mListener, mListenerContext);
+    }
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    mStatus = NS_BINDING_REDIRECTED;
+
+    notifier.RedirectSucceeded();
+
+    ReleaseListeners();
+
+    return rv;
+}
+
+nsresult
+nsHttpChannel::ResolveProxy()
+{
+    LOG(("nsHttpChannel::ResolveProxy [this=%p]\n", this));
+
+    nsresult rv;
+
+    nsCOMPtr<nsIProtocolProxyService> pps =
+            do_GetService(NS_PROTOCOLPROXYSERVICE_CONTRACTID, &rv);
+    if (NS_FAILED(rv))
+        return rv;
+
+    // using the nsIProtocolProxyService2 allows a minor performance
+    // optimization, but if an add-on has only provided the original interface
+    // then it is ok to use that version.
+    nsCOMPtr<nsIProtocolProxyService2> pps2 = do_QueryInterface(pps);
+    if (pps2) {
+        rv = pps2->AsyncResolve2(this, mProxyResolveFlags,
+                                 this, getter_AddRefs(mProxyRequest));
+    } else {
+        rv = pps->AsyncResolve(static_cast<nsIChannel*>(this), mProxyResolveFlags,
+                               this, getter_AddRefs(mProxyRequest));
+    }
+
+    return rv;
+}
+
+bool
+nsHttpChannel::ResponseWouldVary(nsICacheEntry* entry)
+{
+    nsresult rv;
+    nsAutoCString buf, metaKey;
+    mCachedResponseHead->GetHeader(nsHttp::Vary, buf);
+    if (!buf.IsEmpty()) {
+        NS_NAMED_LITERAL_CSTRING(prefix, "request-");
+
+        // enumerate the elements of the Vary header...
+        char *val = buf.BeginWriting(); // going to munge buf
+        char *token = nsCRT::strtok(val, NS_HTTP_HEADER_SEPS, &val);
+        while (token) {
+            LOG(("nsHttpChannel::ResponseWouldVary [channel=%p] " \
+                 "processing %s\n",
+                 this, token));
+            //
+            // if "*", then assume response would vary.  technically speaking,
+            // "Vary: header, *" is not permitted, but we allow it anyways.
+            //
+            // We hash values of cookie-headers for the following reasons:
+            //
+            //   1- cookies can be very large in size
+            //
+            //   2- cookies may contain sensitive information.  (for parity with
+            //      out policy of not storing Set-cookie headers in the cache
+            //      meta data, we likewise do not want to store cookie headers
+            //      here.)
+            //
+            if (*token == '*')
+                return true; // if we encounter this, just get out of here
+
+            // build cache meta data key...
+            metaKey = prefix + nsDependentCString(token);
+
+            // check the last value of the given request header to see if it has
+            // since changed.  if so, then indeed the cached response is invalid.
+            nsXPIDLCString lastVal;
+            entry->GetMetaDataElement(metaKey.get(), getter_Copies(lastVal));
+            LOG(("nsHttpChannel::ResponseWouldVary [channel=%p] "
+                     "stored value = \"%s\"\n",
+                 this, lastVal.get()));
+
+            // Look for value of "Cookie" in the request headers
+            nsHttpAtom atom = nsHttp::ResolveAtom(token);
+            nsAutoCString newVal;
+            bool hasHeader = NS_SUCCEEDED(mRequestHead.GetHeader(atom,
+                                                                 newVal));
+            if (!lastVal.IsEmpty()) {
+                // value for this header in cache, but no value in request
+                if (!hasHeader) {
+                    return true; // yes - response would vary
+                }
+
+                // If this is a cookie-header, stored metadata is not
+                // the value itself but the hash. So we also hash the
+                // outgoing value here in order to compare the hashes
+                nsAutoCString hash;
+                if (atom == nsHttp::Cookie) {
+                    rv = Hash(newVal.get(), hash);
+                    // If hash failed, be conservative (the cached hash
+                    // exists at this point) and claim response would vary
+                    if (NS_FAILED(rv))
+                        return true;
+                    newVal = hash;
+
+                    LOG(("nsHttpChannel::ResponseWouldVary [this=%p] " \
+                            "set-cookie value hashed to %s\n",
+                         this, newVal.get()));
+                }
+
+                if (!newVal.Equals(lastVal)) {
+                    return true; // yes, response would vary
+                }
+
+            } else if (hasHeader) { // old value is empty, but newVal is set
+                return true;
+            }
+
+            // next token...
+            token = nsCRT::strtok(val, NS_HTTP_HEADER_SEPS, &val);
+        }
+    }
+    return false;
+}
+
+// We need to have an implementation of this function just so that we can keep
+// all references to mCallOnResume of type nsHttpChannel:  it's not OK in C++
+// to set a member function ptr to  a base class function.
+void
+nsHttpChannel::HandleAsyncAbort()
+{
+    HttpAsyncAborter<nsHttpChannel>::HandleAsyncAbort();
+}
+
+
+nsresult
+nsHttpChannel::EnsureAssocReq()
+{
+    // Confirm Assoc-Req response header on pipelined transactions
+    // per draft-nottingham-http-pipeline-01.txt
+    // of the form: GET http://blah.com/foo/bar?qv
+    // return NS_OK as long as we don't find a violation
+    // (i.e. no header is ok, as are malformed headers, as are
+    // transactions that have not been pipelined (unless those have been
+    // opted in via pragma))
+
+    if (!mResponseHead)
+        return NS_OK;
+
+    nsAutoCString assoc_val;
+    if (NS_FAILED(mResponseHead->GetHeader(nsHttp::Assoc_Req, assoc_val))) {
+        return NS_OK;
+    }
+
+    if (!mTransaction || !mURI)
+        return NS_OK;
+
+    if (!mTransaction->PipelinePosition()) {
+        // "Pragma: X-Verify-Assoc-Req" can be used to verify even non pipelined
+        // transactions. It is used by test harness.
+
+        nsAutoCString pragma_val;
+        mResponseHead->GetHeader(nsHttp::Pragma, pragma_val);
+        if (pragma_val.IsEmpty() ||
+            !nsHttp::FindToken(pragma_val.get(), "X-Verify-Assoc-Req",
+                               HTTP_HEADER_VALUE_SEPS))
+            return NS_OK;
+    }
+
+    char *method = net_FindCharNotInSet(assoc_val.get(), HTTP_LWS);
+    if (!method)
+        return NS_OK;
+
+    bool equals;
+    char *endofmethod;
+
+    char * assoc_valChar = nullptr;
+    endofmethod = net_FindCharInSet(method, HTTP_LWS);
+    if (endofmethod)
+        assoc_valChar = net_FindCharNotInSet(endofmethod, HTTP_LWS);
+    if (!assoc_valChar)
+        return NS_OK;
+
+    // check the method
+    nsAutoCString methodHead;
+    mRequestHead.Method(methodHead);
+    if ((((int32_t)methodHead.Length()) != (endofmethod - method)) ||
+        PL_strncmp(method,
+                   methodHead.get(),
+                   endofmethod - method)) {
+        LOG(("  Assoc-Req failure Method %s", method));
+        if (mConnectionInfo)
+            gHttpHandler->ConnMgr()->
+                PipelineFeedbackInfo(mConnectionInfo,
+                                     nsHttpConnectionMgr::RedCorruptedContent,
+                                     nullptr, 0);
+
+        nsCOMPtr<nsIConsoleService> consoleService =
+            do_GetService(NS_CONSOLESERVICE_CONTRACTID);
+        if (consoleService) {
+            nsAutoString message
+                (NS_LITERAL_STRING("Failed Assoc-Req. Received "));
+            nsAutoCString assoc_req;
+            mResponseHead->GetHeader(nsHttp::Assoc_Req, assoc_req);
+            AppendASCIItoUTF16(assoc_req, message);
+            message += NS_LITERAL_STRING(" expected method ");
+            AppendASCIItoUTF16(methodHead, message);
+            consoleService->LogStringMessage(message.get());
+        }
+
+        if (gHttpHandler->EnforceAssocReq())
+            return NS_ERROR_CORRUPTED_CONTENT;
+        return NS_OK;
+    }
+
+    // check the URL
+    nsCOMPtr<nsIURI> assoc_url;
+    if (NS_FAILED(NS_NewURI(getter_AddRefs(assoc_url), assoc_valChar)) ||
+        !assoc_url)
+        return NS_OK;
+
+    mURI->Equals(assoc_url, &equals);
+    if (!equals) {
+        LOG(("  Assoc-Req failure URL %s", assoc_valChar));
+        if (mConnectionInfo)
+            gHttpHandler->ConnMgr()->
+                PipelineFeedbackInfo(mConnectionInfo,
+                                     nsHttpConnectionMgr::RedCorruptedContent,
+                                     nullptr, 0);
+
+        nsCOMPtr<nsIConsoleService> consoleService =
+            do_GetService(NS_CONSOLESERVICE_CONTRACTID);
+        if (consoleService) {
+            nsAutoString message
+                (NS_LITERAL_STRING("Failed Assoc-Req. Received "));
+            nsAutoCString assoc_req;
+            mResponseHead->GetHeader(nsHttp::Assoc_Req, assoc_req);
+            AppendASCIItoUTF16(assoc_req, message);
+            message += NS_LITERAL_STRING(" expected URL ");
+            AppendASCIItoUTF16(mSpec.get(), message);
+            consoleService->LogStringMessage(message.get());
+        }
+
+        if (gHttpHandler->EnforceAssocReq())
+            return NS_ERROR_CORRUPTED_CONTENT;
+    }
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <byte-range>
+//-----------------------------------------------------------------------------
+
+bool
+nsHttpChannel::IsResumable(int64_t partialLen, int64_t contentLength,
+                           bool ignoreMissingPartialLen) const
+{
+    bool hasContentEncoding =
+        mCachedResponseHead->HasHeader(nsHttp::Content_Encoding);
+
+    nsAutoCString etag; 
+    mCachedResponseHead->GetHeader(nsHttp::ETag, etag);
+    bool hasWeakEtag = !etag.IsEmpty() &&
+                       StringBeginsWith(etag, NS_LITERAL_CSTRING("W/"));
+
+    return (partialLen < contentLength) &&
+           (partialLen > 0 || ignoreMissingPartialLen) &&
+           !hasContentEncoding && !hasWeakEtag &&
+           mCachedResponseHead->IsResumable() &&
+           !mCustomConditionalRequest &&
+           !mCachedResponseHead->NoStore();
+}
+
+nsresult
+nsHttpChannel::MaybeSetupByteRangeRequest(int64_t partialLen, int64_t contentLength,
+                                          bool ignoreMissingPartialLen)
+{
+    // Be pesimistic
+    mIsPartialRequest = false;
+
+    if (!IsResumable(partialLen, contentLength, ignoreMissingPartialLen))
+      return NS_ERROR_NOT_RESUMABLE;
+
+    // looks like a partial entry we can reuse; add If-Range
+    // and Range headers.
+    nsresult rv = SetupByteRangeRequest(partialLen);
+    if (NS_FAILED(rv)) {
+        // Make the request unconditional again.
+        UntieByteRangeRequest();
+    }
+
+    return rv;
+}
+
+nsresult
+nsHttpChannel::SetupByteRangeRequest(int64_t partialLen)
+{
+    // cached content has been found to be partial, add necessary request
+    // headers to complete cache entry.
+
+    // use strongest validator available...
+    nsAutoCString val;
+    mCachedResponseHead->GetHeader(nsHttp::ETag, val);
+    if (val.IsEmpty())
+        mCachedResponseHead->GetHeader(nsHttp::Last_Modified, val);
+    if (val.IsEmpty()) {
+        // if we hit this code it means mCachedResponseHead->IsResumable() is
+        // either broken or not being called.
+        NS_NOTREACHED("no cache validator");
+        mIsPartialRequest = false;
+        return NS_ERROR_FAILURE;
+    }
+
+    char buf[64];
+    SprintfLiteral(buf, "bytes=%" PRId64 "-", partialLen);
+
+    mRequestHead.SetHeader(nsHttp::Range, nsDependentCString(buf));
+    mRequestHead.SetHeader(nsHttp::If_Range, val);
+    mIsPartialRequest = true;
+
+    return NS_OK;
+}
+
+void
+nsHttpChannel::UntieByteRangeRequest()
+{
+    mRequestHead.ClearHeader(nsHttp::Range);
+    mRequestHead.ClearHeader(nsHttp::If_Range);
+}
+
+nsresult
+nsHttpChannel::ProcessPartialContent()
+{
+    // ok, we've just received a 206
+    //
+    // we need to stream whatever data is in the cache out first, and then
+    // pick up whatever data is on the wire, writing it into the cache.
+
+    LOG(("nsHttpChannel::ProcessPartialContent [this=%p]\n", this));
+
+    NS_ENSURE_TRUE(mCachedResponseHead, NS_ERROR_NOT_INITIALIZED);
+    NS_ENSURE_TRUE(mCacheEntry, NS_ERROR_NOT_INITIALIZED);
+
+    // Make sure to clear bogus content-encodings before looking at the header
+    ClearBogusContentEncodingIfNeeded();
+
+    // Check if the content-encoding we now got is different from the one we
+    // got before
+    nsAutoCString contentEncoding, cachedContentEncoding;
+    mResponseHead->GetHeader(nsHttp::Content_Encoding, contentEncoding);
+    mCachedResponseHead->GetHeader(nsHttp::Content_Encoding,
+                                   cachedContentEncoding);
+    if (PL_strcasecmp(contentEncoding.get(), cachedContentEncoding.get())
+        != 0) {
+        Cancel(NS_ERROR_INVALID_CONTENT_ENCODING);
+        return CallOnStartRequest();
+    }
+
+    nsresult rv;
+
+    int64_t cachedContentLength = mCachedResponseHead->ContentLength();
+    int64_t entitySize = mResponseHead->TotalEntitySize();
+
+    nsAutoCString contentRange;
+    mResponseHead->GetHeader(nsHttp::Content_Range, contentRange);
+    LOG(("nsHttpChannel::ProcessPartialContent [this=%p trans=%p] "
+         "original content-length %lld, entity-size %lld, content-range %s\n",
+         this, mTransaction.get(), cachedContentLength, entitySize,
+         contentRange.get()));
+
+    if ((entitySize >= 0) && (cachedContentLength >= 0) &&
+        (entitySize != cachedContentLength)) {
+        LOG(("nsHttpChannel::ProcessPartialContent [this=%p] "
+             "206 has different total entity size than the content length "
+             "of the original partially cached entity.\n", this));
+
+        mCacheEntry->AsyncDoom(nullptr);
+        Cancel(NS_ERROR_CORRUPTED_CONTENT);
+        return CallOnStartRequest();
+    }
+
+    if (mConcurrentCacheAccess) {
+        // We started to read cached data sooner than its write has been done.
+        // But the concurrent write has not finished completely, so we had to
+        // do a range request.  Now let the content coming from the network
+        // be presented to consumers and also stored to the cache entry.
+
+        rv = InstallCacheListener(mLogicalOffset);
+        if (NS_FAILED(rv)) return rv;
+
+        if (mOfflineCacheEntry) {
+            rv = InstallOfflineCacheListener(mLogicalOffset);
+            if (NS_FAILED(rv)) return rv;
+        }
+    } else {
+        // suspend the current transaction
+        rv = mTransactionPump->Suspend();
+        if (NS_FAILED(rv)) return rv;
+    }
+
+    // merge any new headers with the cached response headers
+    rv = mCachedResponseHead->UpdateHeaders(mResponseHead);
+    if (NS_FAILED(rv)) return rv;
+
+    // update the cached response head
+    nsAutoCString head;
+    mCachedResponseHead->Flatten(head, true);
+    rv = mCacheEntry->SetMetaDataElement("response-head", head.get());
+    if (NS_FAILED(rv)) return rv;
+
+    // make the cached response be the current response
+    mResponseHead = Move(mCachedResponseHead);
+
+    UpdateInhibitPersistentCachingFlag();
+
+    rv = UpdateExpirationTime();
+    if (NS_FAILED(rv)) return rv;
+
+    // notify observers interested in looking at a response that has been
+    // merged with any cached headers (http-on-examine-merged-response).
+    gHttpHandler->OnExamineMergedResponse(this);
+
+    if (mConcurrentCacheAccess) {
+        mCachedContentIsPartial = false;
+        // Leave the mConcurrentCacheAccess flag set, we want to use it
+        // to prevent duplicate OnStartRequest call on the target listener
+        // in case this channel is canceled before it gets its OnStartRequest
+        // from the http transaction.
+
+        // Now we continue reading the network response.
+    } else {
+        // the cached content is valid, although incomplete.
+        mCachedContentIsValid = true;
+        rv = ReadFromCache(false);
+    }
+
+    return rv;
+}
+
+nsresult
+nsHttpChannel::OnDoneReadingPartialCacheEntry(bool *streamDone)
+{
+    nsresult rv;
+
+    LOG(("nsHttpChannel::OnDoneReadingPartialCacheEntry [this=%p]", this));
+
+    // by default, assume we would have streamed all data or failed...
+    *streamDone = true;
+
+    // setup cache listener to append to cache entry
+    int64_t size;
+    rv = mCacheEntry->GetDataSize(&size);
+    if (NS_FAILED(rv)) return rv;
+
+    rv = InstallCacheListener(size);
+    if (NS_FAILED(rv)) return rv;
+
+    // Entry is valid, do it now, after the output stream has been opened,
+    // otherwise when done earlier, pending readers would consider the cache
+    // entry still as partial (CacheEntry::GetDataSize would return the partial
+    // data size) and consumers would do the conditional request again.
+    rv = mCacheEntry->SetValid();
+    if (NS_FAILED(rv)) return rv;
+
+    // need to track the logical offset of the data being sent to our listener
+    mLogicalOffset = size;
+
+    // we're now completing the cached content, so we can clear this flag.
+    // this puts us in the state of a regular download.
+    mCachedContentIsPartial = false;
+    // The cache input stream pump is finished, we do not need it any more.
+    // (see bug 1313923)
+    mCachePump = nullptr;
+
+    // resume the transaction if it exists, otherwise the pipe contained the
+    // remaining part of the document and we've now streamed all of the data.
+    if (mTransactionPump) {
+        rv = mTransactionPump->Resume();
+        if (NS_SUCCEEDED(rv))
+            *streamDone = false;
+    }
+    else
+        NS_NOTREACHED("no transaction");
+    return rv;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <cache>
+//-----------------------------------------------------------------------------
+
+bool
+nsHttpChannel::ShouldBypassProcessNotModified()
+{
+    if (mCustomConditionalRequest) {
+        LOG(("Bypassing ProcessNotModified due to custom conditional headers"));
+        return true;
+    }
+
+    if (!mDidReval) {
+        LOG(("Server returned a 304 response even though we did not send a "
+             "conditional request"));
+        return true;
+    }
+
+    return false;
+}
+
+nsresult
+nsHttpChannel::ProcessNotModified()
+{
+    nsresult rv;
+
+    LOG(("nsHttpChannel::ProcessNotModified [this=%p]\n", this));
+
+    // Assert ShouldBypassProcessNotModified() has been checked before call to
+    // ProcessNotModified().
+    MOZ_ASSERT(!ShouldBypassProcessNotModified());
+
+    MOZ_ASSERT(mCachedResponseHead);
+    MOZ_ASSERT(mCacheEntry);
+    NS_ENSURE_TRUE(mCachedResponseHead && mCacheEntry, NS_ERROR_UNEXPECTED);
+
+    // If the 304 response contains a Last-Modified different than the
+    // one in our cache that is pretty suspicious and is, in at least the
+    // case of bug 716840, a sign of the server having previously corrupted
+    // our cache with a bad response. Take the minor step here of just dooming
+    // that cache entry so there is a fighting chance of getting things on the
+    // right track as well as disabling pipelining for that host.
+
+    nsAutoCString lastModifiedCached;
+    nsAutoCString lastModified304;
+
+    rv = mCachedResponseHead->GetHeader(nsHttp::Last_Modified,
+                                        lastModifiedCached);
+    if (NS_SUCCEEDED(rv)) {
+        rv = mResponseHead->GetHeader(nsHttp::Last_Modified,
+                                      lastModified304);
+    }
+
+    if (NS_SUCCEEDED(rv) && !lastModified304.Equals(lastModifiedCached)) {
+        LOG(("Cache Entry and 304 Last-Modified Headers Do Not Match "
+             "[%s] and [%s]\n",
+             lastModifiedCached.get(), lastModified304.get()));
+
+        mCacheEntry->AsyncDoom(nullptr);
+        if (mConnectionInfo)
+            gHttpHandler->ConnMgr()->
+                PipelineFeedbackInfo(mConnectionInfo,
+                                     nsHttpConnectionMgr::RedCorruptedContent,
+                                     nullptr, 0);
+        Telemetry::Accumulate(Telemetry::CACHE_LM_INCONSISTENT, true);
+    }
+
+    // merge any new headers with the cached response headers
+    rv = mCachedResponseHead->UpdateHeaders(mResponseHead);
+    if (NS_FAILED(rv)) return rv;
+
+    // update the cached response head
+    nsAutoCString head;
+    mCachedResponseHead->Flatten(head, true);
+    rv = mCacheEntry->SetMetaDataElement("response-head", head.get());
+    if (NS_FAILED(rv)) return rv;
+
+    // make the cached response be the current response
+    mResponseHead = Move(mCachedResponseHead);
+
+    UpdateInhibitPersistentCachingFlag();
+
+    rv = UpdateExpirationTime();
+    if (NS_FAILED(rv)) return rv;
+
+    rv = AddCacheEntryHeaders(mCacheEntry);
+    if (NS_FAILED(rv)) return rv;
+
+    // notify observers interested in looking at a reponse that has been
+    // merged with any cached headers
+    gHttpHandler->OnExamineMergedResponse(this);
+
+    mCachedContentIsValid = true;
+
+    // Tell other consumers the entry is OK to use
+    rv = mCacheEntry->SetValid();
+    if (NS_FAILED(rv)) return rv;
+
+    rv = ReadFromCache(false);
+    if (NS_FAILED(rv)) return rv;
+
+    mTransactionReplaced = true;
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::ProcessFallback(bool *waitingForRedirectCallback)
+{
+    LOG(("nsHttpChannel::ProcessFallback [this=%p]\n", this));
+    nsresult rv;
+
+    *waitingForRedirectCallback = false;
+    mFallingBack = false;
+
+    // At this point a load has failed (either due to network problems
+    // or an error returned on the server).  Perform an application
+    // cache fallback if we have a URI to fall back to.
+    if (!mApplicationCache || mFallbackKey.IsEmpty() || mFallbackChannel) {
+        LOG(("  choosing not to fallback [%p,%s,%d]",
+             mApplicationCache.get(), mFallbackKey.get(), mFallbackChannel));
+        return NS_OK;
+    }
+
+    // Make sure the fallback entry hasn't been marked as a foreign
+    // entry.
+    uint32_t fallbackEntryType;
+    rv = mApplicationCache->GetTypes(mFallbackKey, &fallbackEntryType);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (fallbackEntryType & nsIApplicationCache::ITEM_FOREIGN) {
+        // This cache points to a fallback that refers to a different
+        // manifest.  Refuse to fall back.
+        return NS_OK;
+    }
+
+    if (!IsInSubpathOfAppCacheManifest(mApplicationCache, mFallbackKey)) {
+        // Refuse to fallback if the fallback key is not contained in the same
+        // path as the cache manifest.
+        return NS_OK;
+    }
+
+    MOZ_ASSERT(fallbackEntryType & nsIApplicationCache::ITEM_FALLBACK,
+               "Fallback entry not marked correctly!");
+
+    // Kill any offline cache entry, and disable offline caching for the
+    // fallback.
+    if (mOfflineCacheEntry) {
+        mOfflineCacheEntry->AsyncDoom(nullptr);
+        mOfflineCacheEntry = nullptr;
+    }
+
+    mApplicationCacheForWrite = nullptr;
+    mOfflineCacheEntry = nullptr;
+
+    // Close the current cache entry.
+    CloseCacheEntry(true);
+
+    // Create a new channel to load the fallback entry.
+    RefPtr<nsIChannel> newChannel;
+    rv = gHttpHandler->NewChannel2(mURI,
+                                   mLoadInfo,
+                                   getter_AddRefs(newChannel));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    uint32_t redirectFlags = nsIChannelEventSink::REDIRECT_INTERNAL;
+    rv = SetupReplacementChannel(mURI, newChannel, true, redirectFlags);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    // Make sure the new channel loads from the fallback key.
+    nsCOMPtr<nsIHttpChannelInternal> httpInternal =
+        do_QueryInterface(newChannel, &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = httpInternal->SetupFallbackChannel(mFallbackKey.get());
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    // ... and fallbacks should only load from the cache.
+    uint32_t newLoadFlags = mLoadFlags | LOAD_REPLACE | LOAD_ONLY_FROM_CACHE;
+    rv = newChannel->SetLoadFlags(newLoadFlags);
+
+    // Inform consumers about this fake redirect
+    mRedirectChannel = newChannel;
+
+    PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessFallback);
+    rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, redirectFlags);
+
+    if (NS_SUCCEEDED(rv))
+        rv = WaitForRedirectCallback();
+
+    if (NS_FAILED(rv)) {
+        AutoRedirectVetoNotifier notifier(this);
+        PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessFallback);
+        return rv;
+    }
+
+    // Indicate we are now waiting for the asynchronous redirect callback
+    // if all went OK.
+    *waitingForRedirectCallback = true;
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::ContinueProcessFallback(nsresult rv)
+{
+    AutoRedirectVetoNotifier notifier(this);
+
+    if (NS_FAILED(rv))
+        return rv;
+
+    NS_PRECONDITION(mRedirectChannel, "No redirect channel?");
+
+    // Make sure to do this after we received redirect veto answer,
+    // i.e. after all sinks had been notified
+    mRedirectChannel->SetOriginalURI(mOriginalURI);
+
+    if (mLoadInfo && mLoadInfo->GetEnforceSecurity()) {
+        MOZ_ASSERT(!mListenerContext, "mListenerContext should be null!");
+        rv = mRedirectChannel->AsyncOpen2(mListener);
+    }
+    else {
+        rv = mRedirectChannel->AsyncOpen(mListener, mListenerContext);
+    }
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (mLoadFlags & LOAD_INITIAL_DOCUMENT_URI) {
+        MaybeWarnAboutAppCache();
+    }
+
+    // close down this channel
+    Cancel(NS_BINDING_REDIRECTED);
+
+    notifier.RedirectSucceeded();
+
+    ReleaseListeners();
+
+    mFallingBack = true;
+
+    return NS_OK;
+}
+
+// Determines if a request is a byte range request for a subrange,
+// i.e. is a byte range request, but not a 0- byte range request.
+static bool
+IsSubRangeRequest(nsHttpRequestHead &aRequestHead)
+{
+    nsAutoCString byteRange;
+    if (NS_FAILED(aRequestHead.GetHeader(nsHttp::Range, byteRange))) {
+        return false;
+    }
+    return !byteRange.EqualsLiteral("bytes=0-");
+}
+
+nsresult
+nsHttpChannel::OpenCacheEntry(bool isHttps)
+{
+    // Handle correctly mCacheEntriesToWaitFor
+    AutoCacheWaitFlags waitFlags(this);
+
+    // Drop this flag here
+    mConcurrentCacheAccess = 0;
+
+    nsresult rv;
+
+    mLoadedFromApplicationCache = false;
+    mHasQueryString = HasQueryString(mRequestHead.ParsedMethod(), mURI);
+
+    LOG(("nsHttpChannel::OpenCacheEntry [this=%p]", this));
+
+    // make sure we're not abusing this function
+    NS_PRECONDITION(!mCacheEntry, "cache entry already open");
+
+    nsAutoCString cacheKey;
+    nsAutoCString extension;
+
+    if (mRequestHead.IsPost()) {
+        // If the post id is already set then this is an attempt to replay
+        // a post transaction via the cache.  Otherwise, we need a unique
+        // post id for this transaction.
+        if (mPostID == 0)
+            mPostID = gHttpHandler->GenerateUniqueID();
+    }
+    else if (!PossiblyIntercepted() && !mRequestHead.IsGet() && !mRequestHead.IsHead()) {
+        // don't use the cache for other types of requests
+        return NS_OK;
+    }
+
+    if (mResuming) {
+        // We don't support caching for requests initiated
+        // via nsIResumableChannel.
+        return NS_OK;
+    }
+
+    // Don't cache byte range requests which are subranges, only cache 0-
+    // byte range requests.
+    if (IsSubRangeRequest(mRequestHead))
+        return NS_OK;
+
+    // Pick up an application cache from the notification
+    // callbacks if available and if we are not an intercepted channel.
+    if (!PossiblyIntercepted() && !mApplicationCache &&
+        mInheritApplicationCache) {
+        nsCOMPtr<nsIApplicationCacheContainer> appCacheContainer;
+        GetCallback(appCacheContainer);
+
+        if (appCacheContainer) {
+            appCacheContainer->GetApplicationCache(getter_AddRefs(mApplicationCache));
+        }
+    }
+
+    nsCOMPtr<nsICacheStorageService> cacheStorageService =
+        do_GetService("@mozilla.org/netwerk/cache-storage-service;1", &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsICacheStorage> cacheStorage;
+    nsCOMPtr<nsIURI> openURI;
+    if (!mFallbackKey.IsEmpty() && mFallbackChannel) {
+        // This is a fallback channel, open fallback URI instead
+        rv = NS_NewURI(getter_AddRefs(openURI), mFallbackKey);
+        NS_ENSURE_SUCCESS(rv, rv);
+    }
+    else {
+        // In the case of intercepted channels, we need to construct the cache
+        // entry key based on the original URI, so that in case the intercepted
+        // channel is redirected, the cache entry key before and after the
+        // redirect is the same.
+        if (PossiblyIntercepted()) {
+            openURI = mOriginalURI;
+        } else {
+            openURI = mURI;
+        }
+    }
+
+    RefPtr<LoadContextInfo> info = GetLoadContextInfo(this);
+    if (!info) {
+        return NS_ERROR_FAILURE;
+    }
+
+    uint32_t cacheEntryOpenFlags;
+    bool offline = gIOService->IsOffline();
+
+    nsAutoCString cacheControlRequestHeader;
+    mRequestHead.GetHeader(nsHttp::Cache_Control, cacheControlRequestHeader);
+    CacheControlParser cacheControlRequest(cacheControlRequestHeader);
+    if (cacheControlRequest.NoStore() && !PossiblyIntercepted()) {
+        goto bypassCacheEntryOpen;
+    }
+
+    if (offline || (mLoadFlags & INHIBIT_CACHING)) {
+        if (BYPASS_LOCAL_CACHE(mLoadFlags) && !offline && !PossiblyIntercepted()) {
+            goto bypassCacheEntryOpen;
+        }
+        cacheEntryOpenFlags = nsICacheStorage::OPEN_READONLY;
+        mCacheEntryIsReadOnly = true;
+    }
+    else if (BYPASS_LOCAL_CACHE(mLoadFlags) && !mApplicationCache) {
+        cacheEntryOpenFlags = nsICacheStorage::OPEN_TRUNCATE;
+    }
+    else {
+        cacheEntryOpenFlags = nsICacheStorage::OPEN_NORMALLY
+                            | nsICacheStorage::CHECK_MULTITHREADED;
+    }
+
+    if (!mPostID && mApplicationCache) {
+        rv = cacheStorageService->AppCacheStorage(info,
+            mApplicationCache,
+            getter_AddRefs(cacheStorage));
+    } else if (PossiblyIntercepted()) {
+        // The synthesized cache has less restrictions on file size and so on.
+        rv = cacheStorageService->SynthesizedCacheStorage(info,
+            getter_AddRefs(cacheStorage));
+    } else if (mLoadFlags & INHIBIT_PERSISTENT_CACHING) {
+        rv = cacheStorageService->MemoryCacheStorage(info, // ? choose app cache as well...
+            getter_AddRefs(cacheStorage));
+    }
+    else if (mPinCacheContent) {
+        rv = cacheStorageService->PinningCacheStorage(info,
+            getter_AddRefs(cacheStorage));
+    }
+    else {
+        rv = cacheStorageService->DiskCacheStorage(info,
+            !mPostID && (mChooseApplicationCache || (mLoadFlags & LOAD_CHECK_OFFLINE_CACHE)),
+            getter_AddRefs(cacheStorage));
+    }
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if ((mClassOfService & nsIClassOfService::Leader) ||
+        (mLoadFlags & LOAD_INITIAL_DOCUMENT_URI))
+        cacheEntryOpenFlags |= nsICacheStorage::OPEN_PRIORITY;
+
+    // Only for backward compatibility with the old cache back end.
+    // When removed, remove the flags and related code snippets.
+    if (mLoadFlags & LOAD_BYPASS_LOCAL_CACHE_IF_BUSY)
+        cacheEntryOpenFlags |= nsICacheStorage::OPEN_BYPASS_IF_BUSY;
+
+    if (PossiblyIntercepted()) {
+        extension.Append(nsPrintfCString("u%lld", mInterceptionID));
+    } else if (mPostID) {
+        extension.Append(nsPrintfCString("%d", mPostID));
+    }
+
+    // If this channel should be intercepted, we do not open a cache entry for this channel
+    // until the interception process is complete and the consumer decides what to do with it.
+    if (mInterceptCache == MAYBE_INTERCEPT) {
+        DebugOnly<bool> exists;
+        MOZ_ASSERT(NS_FAILED(cacheStorage->Exists(openURI, extension, &exists)) || !exists,
+                   "The entry must not exist in the cache before we create it here");
+
+        nsCOMPtr<nsICacheEntry> entry;
+        rv = cacheStorage->OpenTruncate(openURI, extension, getter_AddRefs(entry));
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        nsCOMPtr<nsINetworkInterceptController> controller;
+        GetCallback(controller);
+
+        RefPtr<InterceptedChannelChrome> intercepted =
+                new InterceptedChannelChrome(this, controller, entry);
+        intercepted->NotifyController();
+    } else {
+        if (mInterceptCache == INTERCEPTED) {
+            cacheEntryOpenFlags |= nsICacheStorage::OPEN_INTERCEPTED;
+            // Clear OPEN_TRUNCATE for the fake cache entry, since otherwise
+            // cache storage will close the current entry which breaks the
+            // response synthesis.
+            cacheEntryOpenFlags &= ~nsICacheStorage::OPEN_TRUNCATE;
+            DebugOnly<bool> exists;
+            MOZ_ASSERT(NS_SUCCEEDED(cacheStorage->Exists(openURI, extension, &exists)) && exists,
+                       "The entry must exist in the cache after we create it here");
+        }
+
+        mCacheOpenWithPriority = cacheEntryOpenFlags & nsICacheStorage::OPEN_PRIORITY;
+        mCacheQueueSizeWhenOpen = CacheStorageService::CacheQueueSize(mCacheOpenWithPriority);
+
+        rv = cacheStorage->AsyncOpenURI(openURI, extension, cacheEntryOpenFlags, this);
+        NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    waitFlags.Keep(WAIT_FOR_CACHE_ENTRY);
+
+bypassCacheEntryOpen:
+    if (!mApplicationCacheForWrite)
+        return NS_OK;
+
+    // If there is an app cache to write to, open the entry right now in parallel.
+
+    // make sure we're not abusing this function
+    NS_PRECONDITION(!mOfflineCacheEntry, "cache entry already open");
+
+    if (offline) {
+        // only put things in the offline cache while online
+        return NS_OK;
+    }
+
+    if (mLoadFlags & INHIBIT_CACHING) {
+        // respect demand not to cache
+        return NS_OK;
+    }
+
+    if (!mRequestHead.IsGet()) {
+        // only cache complete documents offline
+        return NS_OK;
+    }
+
+    rv = cacheStorageService->AppCacheStorage(info, mApplicationCacheForWrite,
+                                              getter_AddRefs(cacheStorage));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = cacheStorage->AsyncOpenURI(
+      mURI, EmptyCString(), nsICacheStorage::OPEN_TRUNCATE, this);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    waitFlags.Keep(WAIT_FOR_OFFLINE_CACHE_ENTRY);
+
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::CheckPartial(nsICacheEntry* aEntry, int64_t *aSize, int64_t *aContentLength)
+{
+    nsresult rv;
+
+    rv = aEntry->GetDataSize(aSize);
+
+    if (NS_ERROR_IN_PROGRESS == rv) {
+        *aSize = -1;
+        rv = NS_OK;
+    }
+
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsHttpResponseHead* responseHead = mCachedResponseHead
+        ? mCachedResponseHead
+        : mResponseHead;
+
+    if (!responseHead)
+        return NS_ERROR_UNEXPECTED;
+
+    *aContentLength = responseHead->ContentLength();
+
+    return NS_OK;
+}
+
+void
+nsHttpChannel::UntieValidationRequest()
+{
+    // Make the request unconditional again.
+    mRequestHead.ClearHeader(nsHttp::If_Modified_Since);
+    mRequestHead.ClearHeader(nsHttp::If_None_Match);
+    mRequestHead.ClearHeader(nsHttp::ETag);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnCacheEntryCheck(nsICacheEntry* entry, nsIApplicationCache* appCache,
+                                 uint32_t* aResult)
+{
+    nsresult rv = NS_OK;
+
+    LOG(("nsHttpChannel::OnCacheEntryCheck enter [channel=%p entry=%p]",
+        this, entry));
+
+    nsAutoCString cacheControlRequestHeader;
+    mRequestHead.GetHeader(nsHttp::Cache_Control, cacheControlRequestHeader);
+    CacheControlParser cacheControlRequest(cacheControlRequestHeader);
+
+    if (cacheControlRequest.NoStore()) {
+        LOG(("Not using cached response based on no-store request cache directive\n"));
+        *aResult = ENTRY_NOT_WANTED;
+        return NS_OK;
+    }
+
+    // Remember the request is a custom conditional request so that we can
+    // process any 304 response correctly.
+    mCustomConditionalRequest =
+        mRequestHead.HasHeader(nsHttp::If_Modified_Since) ||
+        mRequestHead.HasHeader(nsHttp::If_None_Match) ||
+        mRequestHead.HasHeader(nsHttp::If_Unmodified_Since) ||
+        mRequestHead.HasHeader(nsHttp::If_Match) ||
+        mRequestHead.HasHeader(nsHttp::If_Range);
+
+    // Be pessimistic: assume the cache entry has no useful data.
+    *aResult = ENTRY_WANTED;
+    mCachedContentIsValid = false;
+
+    nsXPIDLCString buf;
+
+    // Get the method that was used to generate the cached response
+    rv = entry->GetMetaDataElement("request-method", getter_Copies(buf));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    bool methodWasHead = buf.EqualsLiteral("HEAD");
+    bool methodWasGet = buf.EqualsLiteral("GET");
+
+    if (methodWasHead) {
+        // The cached response does not contain an entity.  We can only reuse
+        // the response if the current request is also HEAD.
+        if (!mRequestHead.IsHead()) {
+            return NS_OK;
+        }
+    }
+    buf.Adopt(0);
+
+    // We'll need this value in later computations...
+    uint32_t lastModifiedTime;
+    rv = entry->GetLastModified(&lastModifiedTime);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    // Determine if this is the first time that this cache entry
+    // has been accessed during this session.
+    bool fromPreviousSession =
+            (gHttpHandler->SessionStartTime() > lastModifiedTime);
+
+    // Get the cached HTTP response headers
+    mCachedResponseHead = new nsHttpResponseHead();
+
+    // A "original-response-headers" metadata element holds network original headers,
+    // i.e. the headers in the form as they arrieved from the network.
+    // We need to get the network original headers first, because we need to keep them
+    // in order.
+    rv = entry->GetMetaDataElement("original-response-headers", getter_Copies(buf));
+    if (NS_SUCCEEDED(rv)) {
+        mCachedResponseHead->ParseCachedOriginalHeaders((char *) buf.get());
+    }
+
+    buf.Adopt(0);
+    // A "response-head" metadata element holds response head, e.g. response status
+    // line and headers in the form Firefox uses them internally (no dupicate
+    // headers, etc.).
+    rv = entry->GetMetaDataElement("response-head", getter_Copies(buf));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    // Parse string stored in a "response-head" metadata element.
+    // These response headers will be merged with the orignal headers (i.e. the
+    // headers stored in a "original-response-headers" metadata element).
+    rv = mCachedResponseHead->ParseCachedHead(buf.get());
+    NS_ENSURE_SUCCESS(rv, rv);
+    buf.Adopt(0);
+
+    bool isCachedRedirect = WillRedirect(mCachedResponseHead);
+
+    // Do not return 304 responses from the cache, and also do not return
+    // any other non-redirect 3xx responses from the cache (see bug 759043).
+    NS_ENSURE_TRUE((mCachedResponseHead->Status() / 100 != 3) ||
+                   isCachedRedirect, NS_ERROR_ABORT);
+
+    if (mCachedResponseHead->NoStore() && mCacheEntryIsReadOnly) {
+        // This prevents loading no-store responses when navigating back
+        // while the browser is set to work offline.
+        LOG(("  entry loading as read-only but is no-store, set INHIBIT_CACHING"));
+        mLoadFlags |= nsIRequest::INHIBIT_CACHING;
+    }
+
+    // Don't bother to validate items that are read-only,
+    // unless they are read-only because of INHIBIT_CACHING or because
+    // we're updating the offline cache.
+    // Don't bother to validate if this is a fallback entry.
+    if (!mApplicationCacheForWrite &&
+        (appCache ||
+         (mCacheEntryIsReadOnly && !(mLoadFlags & nsIRequest::INHIBIT_CACHING)) ||
+         mFallbackChannel)) {
+        rv = OpenCacheInputStream(entry, true, !!appCache);
+        if (NS_SUCCEEDED(rv)) {
+            mCachedContentIsValid = true;
+            entry->MaybeMarkValid();
+        }
+        return rv;
+    }
+
+    bool wantCompleteEntry = false;
+
+    if (!methodWasHead && !isCachedRedirect) {
+        // If the cached content-length is set and it does not match the data
+        // size of the cached content, then the cached response is partial...
+        // either we need to issue a byte range request or we need to refetch
+        // the entire document.
+        //
+        // We exclude redirects from this check because we (usually) strip the
+        // entity when we store the cache entry, and even if we didn't, we
+        // always ignore a cached redirect's entity anyway. See bug 759043.
+        int64_t size, contentLength;
+        rv = CheckPartial(entry, &size, &contentLength);
+        NS_ENSURE_SUCCESS(rv,rv);
+
+        if (size == int64_t(-1)) {
+            LOG(("  write is in progress"));
+            if (mLoadFlags & LOAD_BYPASS_LOCAL_CACHE_IF_BUSY) {
+                LOG(("  not interested in the entry, "
+                     "LOAD_BYPASS_LOCAL_CACHE_IF_BUSY specified"));
+
+                *aResult = ENTRY_NOT_WANTED;
+                return NS_OK;
+            }
+
+            // Ignore !(size > 0) from the resumability condition
+            if (!IsResumable(size, contentLength, true)) {
+                LOG(("  wait for entry completion, "
+                     "response is not resumable"));
+
+                wantCompleteEntry = true;
+            }
+            else {
+                mConcurrentCacheAccess = 1;
+            }
+        }
+        else if (contentLength != int64_t(-1) && contentLength != size) {
+            LOG(("Cached data size does not match the Content-Length header "
+                 "[content-length=%lld size=%lld]\n", contentLength, size));
+
+            rv = MaybeSetupByteRangeRequest(size, contentLength);
+            mCachedContentIsPartial = NS_SUCCEEDED(rv) && mIsPartialRequest;
+            if (mCachedContentIsPartial) {
+                rv = OpenCacheInputStream(entry, false, !!appCache);
+                if (NS_FAILED(rv)) {
+                    UntieByteRangeRequest();
+                    return rv;
+                }
+
+                *aResult = ENTRY_NEEDS_REVALIDATION;
+                return NS_OK;
+            }
+
+            if (size == 0 && mCacheOnlyMetadata) {
+                // Don't break cache entry load when the entry's data size
+                // is 0 and mCacheOnlyMetadata flag is set. In that case we
+                // want to proceed since the LOAD_ONLY_IF_MODIFIED flag is
+                // also set.
+                MOZ_ASSERT(mLoadFlags & LOAD_ONLY_IF_MODIFIED);
+            } else if (mInterceptCache != INTERCEPTED) {
+                return rv;
+            }
+        }
+    }
+
+    bool isHttps = false;
+    rv = mURI->SchemeIs("https", &isHttps);
+    NS_ENSURE_SUCCESS(rv,rv);
+
+    bool doValidation = false;
+    bool canAddImsHeader = true;
+
+    bool isForcedValid = false;
+    entry->GetIsForcedValid(&isForcedValid);
+
+    nsXPIDLCString framedBuf;
+    rv = entry->GetMetaDataElement("strongly-framed", getter_Copies(framedBuf));
+    // describe this in terms of explicitly weakly framed so as to be backwards
+    // compatible with old cache contents which dont have strongly-framed makers
+    bool weaklyFramed = NS_SUCCEEDED(rv) && framedBuf.EqualsLiteral("0");
+    bool isImmutable = !weaklyFramed && isHttps && mCachedResponseHead->Immutable();
+
+    // Cached entry is not the entity we request (see bug #633743)
+    if (ResponseWouldVary(entry)) {
+        LOG(("Validating based on Vary headers returning TRUE\n"));
+        canAddImsHeader = false;
+        doValidation = true;
+    }
+    // Check isForcedValid to see if it is possible to skip validation.
+    // Don't skip validation if we have serious reason to believe that this
+    // content is invalid (it's expired).
+    // See netwerk/cache2/nsICacheEntry.idl for details
+    else if (isForcedValid &&
+             (!mCachedResponseHead->ExpiresInPast() ||
+              !mCachedResponseHead->MustValidateIfExpired())) {
+        LOG(("NOT validating based on isForcedValid being true.\n"));
+        Telemetry::AutoCounter<Telemetry::PREDICTOR_TOTAL_PREFETCHES_USED> used;
+        ++used;
+        doValidation = false;
+    }
+    // If the LOAD_FROM_CACHE flag is set, any cached data can simply be used
+    else if (mLoadFlags & nsIRequest::LOAD_FROM_CACHE || mAllowStaleCacheContent) {
+        LOG(("NOT validating based on LOAD_FROM_CACHE load flag\n"));
+        doValidation = false;
+    }
+    // If the VALIDATE_ALWAYS flag is set, any cached data won't be used until
+    // it's revalidated with the server.
+    else if ((mLoadFlags & nsIRequest::VALIDATE_ALWAYS) && !isImmutable) {
+        LOG(("Validating based on VALIDATE_ALWAYS load flag\n"));
+        doValidation = true;
+    }
+    // Even if the VALIDATE_NEVER flag is set, there are still some cases in
+    // which we must validate the cached response with the server.
+    else if (mLoadFlags & nsIRequest::VALIDATE_NEVER) {
+        LOG(("VALIDATE_NEVER set\n"));
+        // if no-store validate cached response (see bug 112564)
+        if (mCachedResponseHead->NoStore()) {
+            LOG(("Validating based on no-store logic\n"));
+            doValidation = true;
+        }
+        else {
+            LOG(("NOT validating based on VALIDATE_NEVER load flag\n"));
+            doValidation = false;
+        }
+    }
+    // check if validation is strictly required...
+    else if (mCachedResponseHead->MustValidate()) {
+        LOG(("Validating based on MustValidate() returning TRUE\n"));
+        doValidation = true;
+    } else {
+        // previously we also checked for a query-url w/out expiration
+        // and didn't do heuristic on it. but defacto that is allowed now.
+        //
+        // Check if the cache entry has expired...
+
+        uint32_t now = NowInSeconds();
+
+        uint32_t age = 0;
+        rv = mCachedResponseHead->ComputeCurrentAge(now, now, &age);
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        uint32_t freshness = 0;
+        rv = mCachedResponseHead->ComputeFreshnessLifetime(&freshness);
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        uint32_t expiration = 0;
+        rv = entry->GetExpirationTime(&expiration);
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        uint32_t maxAgeRequest, maxStaleRequest, minFreshRequest;
+
+        LOG(("  NowInSeconds()=%u, expiration time=%u, freshness lifetime=%u, age=%u",
+             now, expiration, freshness, age));
+
+        if (cacheControlRequest.NoCache()) {
+            LOG(("  validating, no-cache request"));
+            doValidation = true;
+        } else if (cacheControlRequest.MaxStale(&maxStaleRequest)) {
+            uint32_t staleTime = age > freshness ? age - freshness : 0;
+            doValidation = staleTime > maxStaleRequest;
+            LOG(("  validating=%d, max-stale=%u requested", doValidation, maxStaleRequest));
+        } else if (cacheControlRequest.MaxAge(&maxAgeRequest)) {
+            doValidation = age > maxAgeRequest;
+            LOG(("  validating=%d, max-age=%u requested", doValidation, maxAgeRequest));
+        } else if (cacheControlRequest.MinFresh(&minFreshRequest)) {
+            uint32_t freshTime = freshness > age ? freshness - age : 0;
+            doValidation = freshTime < minFreshRequest;
+            LOG(("  validating=%d, min-fresh=%u requested", doValidation, minFreshRequest));
+        } else if (now <= expiration) {
+            doValidation = false;
+            LOG(("  not validating, expire time not in the past"));
+        } else if (mCachedResponseHead->MustValidateIfExpired()) {
+            doValidation = true;
+        } else if (mLoadFlags & nsIRequest::VALIDATE_ONCE_PER_SESSION) {
+            // If the cached response does not include expiration infor-
+            // mation, then we must validate the response, despite whether
+            // or not this is the first access this session.  This behavior
+            // is consistent with existing browsers and is generally expected
+            // by web authors.
+            if (freshness == 0)
+                doValidation = true;
+            else
+                doValidation = fromPreviousSession;
+        }
+        else
+            doValidation = true;
+
+        LOG(("%salidating based on expiration time\n", doValidation ? "V" : "Not v"));
+    }
+
+
+    // If a content signature is expected to be valid in this load,
+    // set doValidation to force a signature check.
+    if (!doValidation &&
+        mLoadInfo && mLoadInfo->GetVerifySignedContent()) {
+        doValidation = true;
+    }
+
+    nsAutoCString requestedETag;
+    if (!doValidation &&
+        NS_SUCCEEDED(mRequestHead.GetHeader(nsHttp::If_Match, requestedETag)) &&
+        (methodWasGet || methodWasHead)) {
+        nsAutoCString cachedETag;
+        mCachedResponseHead->GetHeader(nsHttp::ETag, cachedETag);
+        if (!cachedETag.IsEmpty() &&
+            (StringBeginsWith(cachedETag, NS_LITERAL_CSTRING("W/")) ||
+             !requestedETag.Equals(cachedETag))) {
+            // User has defined If-Match header, if the cached entry is not
+            // matching the provided header value or the cached ETag is weak,
+            // force validation.
+            doValidation = true;
+        }
+    }
+
+    if (!doValidation) {
+        //
+        // Check the authorization headers used to generate the cache entry.
+        // We must validate the cache entry if:
+        //
+        // 1) the cache entry was generated prior to this session w/
+        //    credentials (see bug 103402).
+        // 2) the cache entry was generated w/o credentials, but would now
+        //    require credentials (see bug 96705).
+        //
+        // NOTE: this does not apply to proxy authentication.
+        //
+        entry->GetMetaDataElement("auth", getter_Copies(buf));
+        doValidation =
+            (fromPreviousSession && !buf.IsEmpty()) ||
+            (buf.IsEmpty() && mRequestHead.HasHeader(nsHttp::Authorization));
+    }
+
+    // Bug #561276: We maintain a chain of cache-keys which returns cached
+    // 3xx-responses (redirects) in order to detect cycles. If a cycle is
+    // found, ignore the cached response and hit the net. Otherwise, use
+    // the cached response and add the cache-key to the chain. Note that
+    // a limited number of redirects (cached or not) is allowed and is
+    // enforced independently of this mechanism
+    if (!doValidation && isCachedRedirect) {
+        nsAutoCString cacheKey;
+        GenerateCacheKey(mPostID, cacheKey);
+
+        if (!mRedirectedCachekeys)
+            mRedirectedCachekeys = new nsTArray<nsCString>();
+        else if (mRedirectedCachekeys->Contains(cacheKey))
+            doValidation = true;
+
+        LOG(("Redirection-chain %s key %s\n",
+             doValidation ? "contains" : "does not contain", cacheKey.get()));
+
+        // Append cacheKey if not in the chain already
+        if (!doValidation)
+            mRedirectedCachekeys->AppendElement(cacheKey);
+    }
+
+    if (doValidation && mInterceptCache == INTERCEPTED) {
+        doValidation = false;
+    }
+
+    mCachedContentIsValid = !doValidation;
+
+    if (doValidation) {
+        //
+        // now, we are definitely going to issue a HTTP request to the server.
+        // make it conditional if possible.
+        //
+        // do not attempt to validate no-store content, since servers will not
+        // expect it to be cached.  (we only keep it in our cache for the
+        // purposes of back/forward, etc.)
+        //
+        // the request method MUST be either GET or HEAD (see bug 175641) and
+        // the cached response code must be < 400
+        //
+        // the cached content must not be weakly framed or marked immutable
+        //
+        // do not override conditional headers when consumer has defined its own
+        if (!mCachedResponseHead->NoStore() &&
+            (mRequestHead.IsGet() || mRequestHead.IsHead()) &&
+            !mCustomConditionalRequest && !weaklyFramed && !isImmutable &&
+            (mCachedResponseHead->Status() < 400)) {
+
+            if (mConcurrentCacheAccess) {
+                // In case of concurrent read and also validation request we
+                // must wait for the current writer to close the output stream
+                // first.  Otherwise, when the writer's job would have been interrupted
+                // before all the data were downloaded, we'd have to do a range request
+                // which would be a second request in line during this channel's
+                // life-time.  nsHttpChannel is not designed to do that, so rather
+                // turn off concurrent read and wait for entry's completion.
+                // Then only re-validation or range-re-validation request will go out.
+                mConcurrentCacheAccess = 0;
+                // This will cause that OnCacheEntryCheck is called again with the same
+                // entry after the writer is done.
+                wantCompleteEntry = true;
+            } else {
+                nsAutoCString val;
+                // Add If-Modified-Since header if a Last-Modified was given
+                // and we are allowed to do this (see bugs 510359 and 269303)
+                if (canAddImsHeader) {
+                    mCachedResponseHead->GetHeader(nsHttp::Last_Modified, val);
+                    if (!val.IsEmpty())
+                        mRequestHead.SetHeader(nsHttp::If_Modified_Since, val);
+                }
+                // Add If-None-Match header if an ETag was given in the response
+                mCachedResponseHead->GetHeader(nsHttp::ETag, val);
+                if (!val.IsEmpty())
+                    mRequestHead.SetHeader(nsHttp::If_None_Match, val);
+                mDidReval = true;
+            }
+        }
+    }
+
+    if (mCachedContentIsValid || mDidReval) {
+        rv = OpenCacheInputStream(entry, mCachedContentIsValid, !!appCache);
+        if (NS_FAILED(rv)) {
+            // If we can't get the entity then we have to act as though we
+            // don't have the cache entry.
+            if (mDidReval) {
+                UntieValidationRequest();
+                mDidReval = false;
+            }
+            mCachedContentIsValid = false;
+        }
+    }
+
+    if (mDidReval)
+        *aResult = ENTRY_NEEDS_REVALIDATION;
+    else if (wantCompleteEntry)
+        *aResult = RECHECK_AFTER_WRITE_FINISHED;
+    else
+        *aResult = ENTRY_WANTED;
+
+    if (mCachedContentIsValid) {
+        entry->MaybeMarkValid();
+    }
+
+    LOG(("nsHTTPChannel::OnCacheEntryCheck exit [this=%p doValidation=%d result=%d]\n",
+         this, doValidation, *aResult));
+    return rv;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnCacheEntryAvailable(nsICacheEntry *entry,
+                                     bool aNew,
+                                     nsIApplicationCache* aAppCache,
+                                     nsresult status)
+{
+    MOZ_ASSERT(NS_IsMainThread());
+
+    nsresult rv;
+
+    LOG(("nsHttpChannel::OnCacheEntryAvailable [this=%p entry=%p "
+         "new=%d appcache=%p status=%x mAppCache=%p mAppCacheForWrite=%p]\n",
+         this, entry, aNew, aAppCache, status,
+         mApplicationCache.get(), mApplicationCacheForWrite.get()));
+
+    // if the channel's already fired onStopRequest, then we should ignore
+    // this event.
+    if (!mIsPending) {
+        mCacheInputStream.CloseAndRelease();
+        return NS_OK;
+    }
+
+    rv = OnCacheEntryAvailableInternal(entry, aNew, aAppCache, status);
+    if (NS_FAILED(rv)) {
+        CloseCacheEntry(false);
+        AsyncAbort(rv);
+    }
+
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::OnCacheEntryAvailableInternal(nsICacheEntry *entry,
+                                             bool aNew,
+                                             nsIApplicationCache* aAppCache,
+                                             nsresult status)
+{
+    nsresult rv;
+
+    if (mCanceled) {
+        LOG(("channel was canceled [this=%p status=%x]\n", this, mStatus));
+        return mStatus;
+    }
+
+    if (aAppCache) {
+        if (mApplicationCache == aAppCache && !mCacheEntry) {
+            rv = OnOfflineCacheEntryAvailable(entry, aNew, aAppCache, status);
+        }
+        else if (mApplicationCacheForWrite == aAppCache && aNew && !mOfflineCacheEntry) {
+            rv = OnOfflineCacheEntryForWritingAvailable(entry, aAppCache, status);
+        }
+        else {
+            rv = OnOfflineCacheEntryAvailable(entry, aNew, aAppCache, status);
+        }
+    }
+    else {
+        rv = OnNormalCacheEntryAvailable(entry, aNew, status);
+    }
+
+    if (NS_FAILED(rv) && (mLoadFlags & LOAD_ONLY_FROM_CACHE)) {
+        // If we have a fallback URI (and we're not already
+        // falling back), process the fallback asynchronously.
+        if (!mFallbackChannel && !mFallbackKey.IsEmpty()) {
+            return AsyncCall(&nsHttpChannel::HandleAsyncFallback);
+        }
+
+        return NS_ERROR_DOCUMENT_NOT_CACHED;
+    }
+
+    if (NS_FAILED(rv)) {
+        return rv;
+    }
+
+    // We may be waiting for more callbacks...
+    if (AwaitingCacheCallbacks()) {
+        return NS_OK;
+    }
+
+    return TryHSTSPriming();
+}
+
+nsresult
+nsHttpChannel::OnNormalCacheEntryAvailable(nsICacheEntry *aEntry,
+                                           bool aNew,
+                                           nsresult aEntryStatus)
+{
+    mCacheEntriesToWaitFor &= ~WAIT_FOR_CACHE_ENTRY;
+
+    if (NS_FAILED(aEntryStatus) || aNew) {
+        // Make sure this flag is dropped.  It may happen the entry is doomed
+        // between OnCacheEntryCheck and OnCacheEntryAvailable.
+        mCachedContentIsValid = false;
+
+        // From the same reason remove any conditional headers added
+        // in OnCacheEntryCheck.
+        if (mDidReval) {
+            LOG(("  Removing conditional request headers"));
+            UntieValidationRequest();
+            mDidReval = false;
+        }
+
+        if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
+            // if this channel is only allowed to pull from the cache, then
+            // we must fail if we were unable to open a cache entry for read.
+            return NS_ERROR_DOCUMENT_NOT_CACHED;
+        }
+    }
+
+    if (NS_SUCCEEDED(aEntryStatus)) {
+        mCacheEntry = aEntry;
+        mCacheEntryIsWriteOnly = aNew;
+
+        if (mLoadFlags & LOAD_INITIAL_DOCUMENT_URI) {
+            Telemetry::Accumulate(Telemetry::HTTP_OFFLINE_CACHE_DOCUMENT_LOAD,
+                                  false);
+        }
+    }
+
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::OnOfflineCacheEntryAvailable(nsICacheEntry *aEntry,
+                                            bool aNew,
+                                            nsIApplicationCache* aAppCache,
+                                            nsresult aEntryStatus)
+{
+    MOZ_ASSERT(!mApplicationCache || aAppCache == mApplicationCache);
+    MOZ_ASSERT(!aNew || !aEntry || mApplicationCacheForWrite);
+
+    mCacheEntriesToWaitFor &= ~WAIT_FOR_CACHE_ENTRY;
+
+    nsresult rv;
+
+    if (NS_SUCCEEDED(aEntryStatus)) {
+        if (!mApplicationCache) {
+            mApplicationCache = aAppCache;
+        }
+
+        // We successfully opened an offline cache session and the entry,
+        // so indicate we will load from the offline cache.
+        mLoadedFromApplicationCache = true;
+        mCacheEntryIsReadOnly = true;
+        mCacheEntry = aEntry;
+        mCacheEntryIsWriteOnly = false;
+
+        if (mLoadFlags & LOAD_INITIAL_DOCUMENT_URI && !mApplicationCacheForWrite) {
+            MaybeWarnAboutAppCache();
+        }
+
+        return NS_OK;
+    }
+
+    if (!mApplicationCacheForWrite && !mFallbackChannel) {
+        if (!mApplicationCache) {
+            mApplicationCache = aAppCache;
+        }
+
+        // Check for namespace match.
+        nsCOMPtr<nsIApplicationCacheNamespace> namespaceEntry;
+        rv = mApplicationCache->GetMatchingNamespace(mSpec,
+            getter_AddRefs(namespaceEntry));
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        uint32_t namespaceType = 0;
+        if (!namespaceEntry ||
+            NS_FAILED(namespaceEntry->GetItemType(&namespaceType)) ||
+            (namespaceType &
+             (nsIApplicationCacheNamespace::NAMESPACE_FALLBACK |
+              nsIApplicationCacheNamespace::NAMESPACE_BYPASS)) == 0) {
+            // When loading from an application cache, only items
+            // on the whitelist or matching a
+            // fallback namespace should hit the network...
+            mLoadFlags |= LOAD_ONLY_FROM_CACHE;
+
+            // ... and if there were an application cache entry,
+            // we would have found it earlier.
+            return NS_ERROR_CACHE_KEY_NOT_FOUND;
+        }
+
+        if (namespaceType &
+            nsIApplicationCacheNamespace::NAMESPACE_FALLBACK) {
+
+            nsAutoCString namespaceSpec;
+            rv = namespaceEntry->GetNamespaceSpec(namespaceSpec);
+            NS_ENSURE_SUCCESS(rv, rv);
+
+            // This prevents fallback attacks injected by an insecure subdirectory
+            // for the whole origin (or a parent directory).
+            if (!IsInSubpathOfAppCacheManifest(mApplicationCache, namespaceSpec)) {
+                return NS_OK;
+            }
+
+            rv = namespaceEntry->GetData(mFallbackKey);
+            NS_ENSURE_SUCCESS(rv, rv);
+        }
+    }
+
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::OnOfflineCacheEntryForWritingAvailable(nsICacheEntry *aEntry,
+                                                      nsIApplicationCache* aAppCache,
+                                                      nsresult aEntryStatus)
+{
+    MOZ_ASSERT(mApplicationCacheForWrite && aAppCache == mApplicationCacheForWrite);
+
+    mCacheEntriesToWaitFor &= ~WAIT_FOR_OFFLINE_CACHE_ENTRY;
+
+    if (NS_SUCCEEDED(aEntryStatus)) {
+        mOfflineCacheEntry = aEntry;
+        if (NS_FAILED(aEntry->GetLastModified(&mOfflineCacheLastModifiedTime))) {
+            mOfflineCacheLastModifiedTime = 0;
+        }
+    }
+
+    return aEntryStatus;
+}
+
+// Generates the proper cache-key for this instance of nsHttpChannel
+nsresult
+nsHttpChannel::GenerateCacheKey(uint32_t postID, nsACString &cacheKey)
+{
+    AssembleCacheKey(mFallbackChannel ? mFallbackKey.get() : mSpec.get(),
+                     postID, cacheKey);
+    return NS_OK;
+}
+
+// Assembles a cache-key from the given pieces of information and |mLoadFlags|
+void
+nsHttpChannel::AssembleCacheKey(const char *spec, uint32_t postID,
+                                nsACString &cacheKey)
+{
+    cacheKey.Truncate();
+
+    if (mLoadFlags & LOAD_ANONYMOUS) {
+        cacheKey.AssignLiteral("anon&");
+    }
+
+    if (postID) {
+        char buf[32];
+        SprintfLiteral(buf, "id=%x&", postID);
+        cacheKey.Append(buf);
+    }
+
+    if (!cacheKey.IsEmpty()) {
+        cacheKey.AppendLiteral("uri=");
+    }
+
+    // Strip any trailing #ref from the URL before using it as the key
+    const char *p = strchr(spec, '#');
+    if (p)
+        cacheKey.Append(spec, p - spec);
+    else
+        cacheKey.Append(spec);
+}
+
+nsresult
+DoUpdateExpirationTime(nsHttpChannel* aSelf,
+                       nsICacheEntry* aCacheEntry,
+                       nsHttpResponseHead* aResponseHead,
+                       uint32_t& aExpirationTime)
+{
+    MOZ_ASSERT(aExpirationTime == 0);
+    NS_ENSURE_TRUE(aResponseHead, NS_ERROR_FAILURE);
+
+    nsresult rv;
+
+    if (!aResponseHead->MustValidate()) {
+        uint32_t freshnessLifetime = 0;
+
+        rv = aResponseHead->ComputeFreshnessLifetime(&freshnessLifetime);
+        if (NS_FAILED(rv)) return rv;
+
+        if (freshnessLifetime > 0) {
+            uint32_t now = NowInSeconds(), currentAge = 0;
+
+            rv = aResponseHead->ComputeCurrentAge(now, aSelf->GetRequestTime(), &currentAge);
+            if (NS_FAILED(rv)) return rv;
+
+            LOG(("freshnessLifetime = %u, currentAge = %u\n",
+                freshnessLifetime, currentAge));
+
+            if (freshnessLifetime > currentAge) {
+                uint32_t timeRemaining = freshnessLifetime - currentAge;
+                // be careful... now + timeRemaining may overflow
+                if (now + timeRemaining < now)
+                    aExpirationTime = uint32_t(-1);
+                else
+                    aExpirationTime = now + timeRemaining;
+            }
+            else
+                aExpirationTime = now;
+        }
+    }
+
+    rv = aCacheEntry->SetExpirationTime(aExpirationTime);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    return rv;
+}
+
+// UpdateExpirationTime is called when a new response comes in from the server.
+// It updates the stored response-time and sets the expiration time on the
+// cache entry.
+//
+// From section 13.2.4 of RFC2616, we compute expiration time as follows:
+//
+//    timeRemaining = freshnessLifetime - currentAge
+//    expirationTime = now + timeRemaining
+//
+nsresult
+nsHttpChannel::UpdateExpirationTime()
+{
+    uint32_t expirationTime = 0;
+    nsresult rv = DoUpdateExpirationTime(this, mCacheEntry, mResponseHead, expirationTime);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (mOfflineCacheEntry) {
+        rv = mOfflineCacheEntry->SetExpirationTime(expirationTime);
+        NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    return NS_OK;
+}
+
+/*static*/ inline bool
+nsHttpChannel::HasQueryString(nsHttpRequestHead::ParsedMethodType method, nsIURI * uri)
+{
+    // Must be called on the main thread because nsIURI does not implement
+    // thread-safe QueryInterface.
+    MOZ_ASSERT(NS_IsMainThread());
+
+    if (method != nsHttpRequestHead::kMethod_Get &&
+        method != nsHttpRequestHead::kMethod_Head)
+        return false;
+
+    nsAutoCString query;
+    nsCOMPtr<nsIURL> url = do_QueryInterface(uri);
+    nsresult rv = url->GetQuery(query);
+    return NS_SUCCEEDED(rv) && !query.IsEmpty();
+}
+
+bool
+nsHttpChannel::ShouldUpdateOfflineCacheEntry()
+{
+    if (!mApplicationCacheForWrite || !mOfflineCacheEntry) {
+        return false;
+    }
+
+    // if we're updating the cache entry, update the offline cache entry too
+    if (mCacheEntry && mCacheEntryIsWriteOnly) {
+        return true;
+    }
+
+    // if there's nothing in the offline cache, add it
+    if (mOfflineCacheEntry) {
+        return true;
+    }
+
+    // if the document is newer than the offline entry, update it
+    uint32_t docLastModifiedTime;
+    nsresult rv = mResponseHead->GetLastModifiedValue(&docLastModifiedTime);
+    if (NS_FAILED(rv)) {
+        return true;
+    }
+
+    if (mOfflineCacheLastModifiedTime == 0) {
+        return false;
+    }
+
+    if (docLastModifiedTime > mOfflineCacheLastModifiedTime) {
+        return true;
+    }
+
+    return false;
+}
+
+nsresult
+nsHttpChannel::OpenCacheInputStream(nsICacheEntry* cacheEntry, bool startBuffering,
+                                    bool checkingAppCacheEntry)
+{
+    nsresult rv;
+
+    bool isHttps = false;
+    rv = mURI->SchemeIs("https", &isHttps);
+    NS_ENSURE_SUCCESS(rv,rv);
+
+    if (isHttps) {
+        rv = cacheEntry->GetSecurityInfo(
+                                      getter_AddRefs(mCachedSecurityInfo));
+        if (NS_FAILED(rv)) {
+            LOG(("failed to parse security-info [channel=%p, entry=%p]",
+                 this, cacheEntry));
+            NS_WARNING("failed to parse security-info");
+            cacheEntry->AsyncDoom(nullptr);
+            return rv;
+        }
+
+        // XXX: We should not be skilling this check in the offline cache
+        // case, but we have to do so now to work around bug 794507.
+        bool mustHaveSecurityInfo = !mLoadedFromApplicationCache && !checkingAppCacheEntry;
+        MOZ_ASSERT(mCachedSecurityInfo || !mustHaveSecurityInfo);
+        if (!mCachedSecurityInfo && mustHaveSecurityInfo) {
+            LOG(("mCacheEntry->GetSecurityInfo returned success but did not "
+                 "return the security info [channel=%p, entry=%p]",
+                 this, cacheEntry));
+            cacheEntry->AsyncDoom(nullptr);
+            return NS_ERROR_UNEXPECTED; // XXX error code
+        }
+    }
+
+    // Keep the conditions below in sync with the conditions in ReadFromCache.
+
+    rv = NS_OK;
+
+    if (WillRedirect(mCachedResponseHead)) {
+        // Do not even try to read the entity for a redirect because we do not
+        // return an entity to the application when we process redirects.
+        LOG(("Will skip read of cached redirect entity\n"));
+        return NS_OK;
+    }
+
+    if ((mLoadFlags & nsICachingChannel::LOAD_ONLY_IF_MODIFIED) &&
+        !mCachedContentIsPartial) {
+        // For LOAD_ONLY_IF_MODIFIED, we usually don't have to deal with the
+        // cached entity.
+        if (!mApplicationCacheForWrite) {
+            LOG(("Will skip read from cache based on LOAD_ONLY_IF_MODIFIED "
+                 "load flag\n"));
+            return NS_OK;
+        }
+
+        // If offline caching has been requested and the offline cache needs
+        // updating, we must complete the call even if the main cache entry
+        // is up to date. We don't know yet for sure whether the offline
+        // cache needs updating because at this point we haven't opened it
+        // for writing yet, so we have to start reading the cached entity now
+        // just in case.
+        LOG(("May skip read from cache based on LOAD_ONLY_IF_MODIFIED "
+              "load flag\n"));
+    }
+
+    // Open an input stream for the entity, so that the call to OpenInputStream
+    // happens off the main thread.
+    nsCOMPtr<nsIInputStream> stream;
+
+    // If an alternate representation was requested, try to open the alt
+    // input stream.
+    if (!mPreferredCachedAltDataType.IsEmpty()) {
+        rv = cacheEntry->OpenAlternativeInputStream(mPreferredCachedAltDataType,
+                                                    getter_AddRefs(stream));
+        if (NS_SUCCEEDED(rv)) {
+            // We have succeeded.
+            mAvailableCachedAltDataType = mPreferredCachedAltDataType;
+            // Clear the header.
+            mCachedResponseHead->SetContentLength(-1);
+            // Set the correct data size on the channel.
+            int64_t altDataSize;
+            if (NS_SUCCEEDED(cacheEntry->GetAltDataSize(&altDataSize))) {
+                mCachedResponseHead->SetContentLength(altDataSize);
+            }
+        }
+    }
+
+    if (!stream) {
+        rv = cacheEntry->OpenInputStream(0, getter_AddRefs(stream));
+    }
+
+    if (NS_FAILED(rv)) {
+        LOG(("Failed to open cache input stream [channel=%p, "
+             "mCacheEntry=%p]", this, cacheEntry));
+        return rv;
+    }
+
+    if (startBuffering) {
+        bool nonBlocking;
+        rv = stream->IsNonBlocking(&nonBlocking);
+        if (NS_SUCCEEDED(rv) && nonBlocking)
+            startBuffering = false;
+    }
+
+    if (!startBuffering) {
+        // Bypass wrapping the input stream for the new cache back-end since
+        // nsIStreamTransportService expects a blocking stream.  Preloading of
+        // the data must be done on the level of the cache backend, internally.
+        //
+        // We do not connect the stream to the stream transport service if we
+        // have to validate the entry with the server. If we did, we would get
+        // into a race condition between the stream transport service reading
+        // the existing contents and the opening of the cache entry's output
+        // stream to write the new contents in the case where we get a non-304
+        // response.
+        LOG(("Opened cache input stream without buffering [channel=%p, "
+              "mCacheEntry=%p, stream=%p]", this,
+              cacheEntry, stream.get()));
+        mCacheInputStream.takeOver(stream);
+        return rv;
+    }
+
+    // Have the stream transport service start reading the entity on one of its
+    // background threads.
+
+    nsCOMPtr<nsITransport> transport;
+    nsCOMPtr<nsIInputStream> wrapper;
+
+    nsCOMPtr<nsIStreamTransportService> sts =
+        do_GetService(kStreamTransportServiceCID, &rv);
+    if (NS_SUCCEEDED(rv)) {
+        rv = sts->CreateInputTransport(stream, int64_t(-1), int64_t(-1),
+                                        true, getter_AddRefs(transport));
+    }
+    if (NS_SUCCEEDED(rv)) {
+        rv = transport->OpenInputStream(0, 0, 0, getter_AddRefs(wrapper));
+    }
+    if (NS_SUCCEEDED(rv)) {
+        LOG(("Opened cache input stream [channel=%p, wrapper=%p, "
+              "transport=%p, stream=%p]", this, wrapper.get(),
+              transport.get(), stream.get()));
+    } else {
+        LOG(("Failed to open cache input stream [channel=%p, "
+              "wrapper=%p, transport=%p, stream=%p]", this,
+              wrapper.get(), transport.get(), stream.get()));
+
+        stream->Close();
+        return rv;
+    }
+
+    mCacheInputStream.takeOver(wrapper);
+
+    return NS_OK;
+}
+
+// Actually process the cached response that we started to handle in CheckCache
+// and/or StartBufferingCachedEntity.
+nsresult
+nsHttpChannel::ReadFromCache(bool alreadyMarkedValid)
+{
+    NS_ENSURE_TRUE(mCacheEntry, NS_ERROR_FAILURE);
+    NS_ENSURE_TRUE(mCachedContentIsValid, NS_ERROR_FAILURE);
+
+    LOG(("nsHttpChannel::ReadFromCache [this=%p] "
+         "Using cached copy of: %s\n", this, mSpec.get()));
+
+    if (mCachedResponseHead)
+        mResponseHead = Move(mCachedResponseHead);
+
+    UpdateInhibitPersistentCachingFlag();
+
+    // if we don't already have security info, try to get it from the cache
+    // entry. there are two cases to consider here: 1) we are just reading
+    // from the cache, or 2) this may be due to a 304 not modified response,
+    // in which case we could have security info from a socket transport.
+    if (!mSecurityInfo)
+        mSecurityInfo = mCachedSecurityInfo;
+
+    if (!alreadyMarkedValid && !mCachedContentIsPartial) {
+        // We validated the entry, and we have write access to the cache, so
+        // mark the cache entry as valid in order to allow others access to
+        // this cache entry.
+        //
+        // TODO: This should be done asynchronously so we don't take the cache
+        // service lock on the main thread.
+        mCacheEntry->MaybeMarkValid();
+    }
+
+    nsresult rv;
+
+    // Keep the conditions below in sync with the conditions in
+    // StartBufferingCachedEntity.
+
+    if (WillRedirect(mResponseHead)) {
+        // TODO: Bug 759040 - We should call HandleAsyncRedirect directly here,
+        // to avoid event dispatching latency.
+        MOZ_ASSERT(!mCacheInputStream);
+        LOG(("Skipping skip read of cached redirect entity\n"));
+        return AsyncCall(&nsHttpChannel::HandleAsyncRedirect);
+    }
+
+    if ((mLoadFlags & LOAD_ONLY_IF_MODIFIED) && !mCachedContentIsPartial) {
+        if (!mApplicationCacheForWrite) {
+            LOG(("Skipping read from cache based on LOAD_ONLY_IF_MODIFIED "
+                 "load flag\n"));
+            MOZ_ASSERT(!mCacheInputStream);
+            // TODO: Bug 759040 - We should call HandleAsyncNotModified directly
+            // here, to avoid event dispatching latency.
+            return AsyncCall(&nsHttpChannel::HandleAsyncNotModified);
+        }
+
+        if (!ShouldUpdateOfflineCacheEntry()) {
+            LOG(("Skipping read from cache based on LOAD_ONLY_IF_MODIFIED "
+                 "load flag (mApplicationCacheForWrite not null case)\n"));
+            mCacheInputStream.CloseAndRelease();
+            // TODO: Bug 759040 - We should call HandleAsyncNotModified directly
+            // here, to avoid event dispatching latency.
+            return AsyncCall(&nsHttpChannel::HandleAsyncNotModified);
+        }
+    }
+
+    MOZ_ASSERT(mCacheInputStream);
+    if (!mCacheInputStream) {
+        NS_ERROR("mCacheInputStream is null but we're expecting to "
+                        "be able to read from it.");
+        return NS_ERROR_UNEXPECTED;
+    }
+
+
+    nsCOMPtr<nsIInputStream> inputStream = mCacheInputStream.forget();
+
+    rv = nsInputStreamPump::Create(getter_AddRefs(mCachePump), inputStream,
+                                   int64_t(-1), int64_t(-1), 0, 0, true);
+    if (NS_FAILED(rv)) {
+        inputStream->Close();
+        return rv;
+    }
+
+    rv = mCachePump->AsyncRead(this, mListenerContext);
+    if (NS_FAILED(rv)) return rv;
+
+    if (mTimingEnabled)
+        mCacheReadStart = TimeStamp::Now();
+
+    uint32_t suspendCount = mSuspendCount;
+    while (suspendCount--)
+        mCachePump->Suspend();
+
+    return NS_OK;
+}
+
+void
+nsHttpChannel::CloseCacheEntry(bool doomOnFailure)
+{
+    mCacheInputStream.CloseAndRelease();
+
+    if (!mCacheEntry)
+        return;
+
+    LOG(("nsHttpChannel::CloseCacheEntry [this=%p] mStatus=%x mCacheEntryIsWriteOnly=%x",
+         this, mStatus, mCacheEntryIsWriteOnly));
+
+    // If we have begun to create or replace a cache entry, and that cache
+    // entry is not complete and not resumable, then it needs to be doomed.
+    // Otherwise, CheckCache will make the mistake of thinking that the
+    // partial cache entry is complete.
+
+    bool doom = false;
+    if (mInitedCacheEntry) {
+        MOZ_ASSERT(mResponseHead, "oops");
+        if (NS_FAILED(mStatus) && doomOnFailure &&
+            mCacheEntryIsWriteOnly && !mResponseHead->IsResumable())
+            doom = true;
+    }
+    else if (mCacheEntryIsWriteOnly)
+        doom = true;
+
+    if (doom) {
+        LOG(("  dooming cache entry!!"));
+        mCacheEntry->AsyncDoom(nullptr);
+    } else {
+      // Store updated security info, makes cached EV status race less likely
+      // (see bug 1040086)
+      if (mSecurityInfo)
+          mCacheEntry->SetSecurityInfo(mSecurityInfo);
+    }
+
+    mCachedResponseHead = nullptr;
+
+    mCachePump = nullptr;
+    mCacheEntry = nullptr;
+    mCacheEntryIsWriteOnly = false;
+    mInitedCacheEntry = false;
+}
+
+
+void
+nsHttpChannel::CloseOfflineCacheEntry()
+{
+    if (!mOfflineCacheEntry)
+        return;
+
+    LOG(("nsHttpChannel::CloseOfflineCacheEntry [this=%p]", this));
+
+    if (NS_FAILED(mStatus)) {
+        mOfflineCacheEntry->AsyncDoom(nullptr);
+    }
+    else {
+        bool succeeded;
+        if (NS_SUCCEEDED(GetRequestSucceeded(&succeeded)) && !succeeded)
+            mOfflineCacheEntry->AsyncDoom(nullptr);
+    }
+
+    mOfflineCacheEntry = nullptr;
+}
+
+
+// Initialize the cache entry for writing.
+//  - finalize storage policy
+//  - store security info
+//  - update expiration time
+//  - store headers and other meta data
+nsresult
+nsHttpChannel::InitCacheEntry()
+{
+    nsresult rv;
+
+    NS_ENSURE_TRUE(mCacheEntry, NS_ERROR_UNEXPECTED);
+    // if only reading, nothing to be done here.
+    if (mCacheEntryIsReadOnly)
+        return NS_OK;
+
+    // Don't cache the response again if already cached...
+    if (mCachedContentIsValid)
+        return NS_OK;
+
+    LOG(("nsHttpChannel::InitCacheEntry [this=%p entry=%p]\n",
+        this, mCacheEntry.get()));
+
+    bool recreate = !mCacheEntryIsWriteOnly;
+    bool dontPersist = mLoadFlags & INHIBIT_PERSISTENT_CACHING;
+
+    if (!recreate && dontPersist) {
+        // If the current entry is persistent but we inhibit peristence
+        // then force recreation of the entry as memory/only.
+        rv = mCacheEntry->GetPersistent(&recreate);
+        if (NS_FAILED(rv))
+            return rv;
+    }
+
+    if (recreate) {
+        LOG(("  we have a ready entry, but reading it again from the server -> recreating cache entry\n"));
+        nsCOMPtr<nsICacheEntry> currentEntry;
+        currentEntry.swap(mCacheEntry);
+        rv = currentEntry->Recreate(dontPersist, getter_AddRefs(mCacheEntry));
+        if (NS_FAILED(rv)) {
+          LOG(("  recreation failed, the response will not be cached"));
+          return NS_OK;
+        }
+
+        mCacheEntryIsWriteOnly = true;
+    }
+
+    // Set the expiration time for this cache entry
+    rv = UpdateExpirationTime();
+    if (NS_FAILED(rv)) return rv;
+
+    // mark this weakly framed until a response body is seen
+    mCacheEntry->SetMetaDataElement("strongly-framed", "0");
+
+    rv = AddCacheEntryHeaders(mCacheEntry);
+    if (NS_FAILED(rv)) return rv;
+
+    mInitedCacheEntry = true;
+
+    // Don't perform the check when writing (doesn't make sense)
+    mConcurrentCacheAccess = 0;
+
+    return NS_OK;
+}
+
+void
+nsHttpChannel::UpdateInhibitPersistentCachingFlag()
+{
+    // The no-store directive within the 'Cache-Control:' header indicates
+    // that we must not store the response in a persistent cache.
+    if (mResponseHead->NoStore())
+        mLoadFlags |= INHIBIT_PERSISTENT_CACHING;
+
+    // Only cache SSL content on disk if the pref is set
+    bool isHttps;
+    if (!gHttpHandler->IsPersistentHttpsCachingEnabled() &&
+        NS_SUCCEEDED(mURI->SchemeIs("https", &isHttps)) && isHttps) {
+        mLoadFlags |= INHIBIT_PERSISTENT_CACHING;
+    }
+}
+
+nsresult
+nsHttpChannel::InitOfflineCacheEntry()
+{
+    // This function can be called even when we fail to connect (bug 551990)
+
+    if (!mOfflineCacheEntry) {
+        return NS_OK;
+    }
+
+    if (!mResponseHead || mResponseHead->NoStore()) {
+        if (mResponseHead && mResponseHead->NoStore()) {
+            mOfflineCacheEntry->AsyncDoom(nullptr);
+        }
+
+        CloseOfflineCacheEntry();
+
+        if (mResponseHead && mResponseHead->NoStore()) {
+            return NS_ERROR_NOT_AVAILABLE;
+        }
+
+        return NS_OK;
+    }
+
+    // This entry's expiration time should match the main entry's expiration
+    // time.  UpdateExpirationTime() will keep it in sync once the offline
+    // cache entry has been created.
+    if (mCacheEntry) {
+        uint32_t expirationTime;
+        nsresult rv = mCacheEntry->GetExpirationTime(&expirationTime);
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        mOfflineCacheEntry->SetExpirationTime(expirationTime);
+    }
+
+    return AddCacheEntryHeaders(mOfflineCacheEntry);
+}
+
+
+nsresult
+DoAddCacheEntryHeaders(nsHttpChannel *self,
+                       nsICacheEntry *entry,
+                       nsHttpRequestHead *requestHead,
+                       nsHttpResponseHead *responseHead,
+                       nsISupports *securityInfo)
+{
+    nsresult rv;
+
+    LOG(("nsHttpChannel::AddCacheEntryHeaders [this=%p] begin", self));
+    // Store secure data in memory only
+    if (securityInfo)
+        entry->SetSecurityInfo(securityInfo);
+
+    // Store the HTTP request method with the cache entry so we can distinguish
+    // for example GET and HEAD responses.
+    nsAutoCString method;
+    requestHead->Method(method);
+    rv = entry->SetMetaDataElement("request-method", method.get());
+    if (NS_FAILED(rv)) return rv;
+
+    // Store the HTTP authorization scheme used if any...
+    rv = StoreAuthorizationMetaData(entry, requestHead);
+    if (NS_FAILED(rv)) return rv;
+
+    // Iterate over the headers listed in the Vary response header, and
+    // store the value of the corresponding request header so we can verify
+    // that it has not varied when we try to re-use the cached response at
+    // a later time.  Take care to store "Cookie" headers only as hashes
+    // due to security considerations and the fact that they can be pretty
+    // large (bug 468426). We take care of "Vary: cookie" in ResponseWouldVary.
+    //
+    // NOTE: if "Vary: accept, cookie", then we will store the "accept" header
+    // in the cache.  we could try to avoid needlessly storing the "accept"
+    // header in this case, but it doesn't seem worth the extra code to perform
+    // the check.
+    {
+        nsAutoCString buf, metaKey;
+        responseHead->GetHeader(nsHttp::Vary, buf);
+        if (!buf.IsEmpty()) {
+            NS_NAMED_LITERAL_CSTRING(prefix, "request-");
+
+            char *bufData = buf.BeginWriting(); // going to munge buf
+            char *token = nsCRT::strtok(bufData, NS_HTTP_HEADER_SEPS, &bufData);
+            while (token) {
+                LOG(("nsHttpChannel::AddCacheEntryHeaders [this=%p] " \
+                        "processing %s", self, token));
+                if (*token != '*') {
+                    nsHttpAtom atom = nsHttp::ResolveAtom(token);
+                    nsAutoCString val;
+                    nsAutoCString hash;
+                    if (NS_SUCCEEDED(requestHead->GetHeader(atom, val))) {
+                        // If cookie-header, store a hash of the value
+                        if (atom == nsHttp::Cookie) {
+                            LOG(("nsHttpChannel::AddCacheEntryHeaders [this=%p] " \
+                                    "cookie-value %s", self, val.get()));
+                            rv = Hash(val.get(), hash);
+                            // If hash failed, store a string not very likely
+                            // to be the result of subsequent hashes
+                            if (NS_FAILED(rv)) {
+                                val = NS_LITERAL_CSTRING("<hash failed>");
+                            } else {
+                                val = hash;
+                            }
+
+                            LOG(("   hashed to %s\n", val.get()));
+                        }
+
+                        // build cache meta data key and set meta data element...
+                        metaKey = prefix + nsDependentCString(token);
+                        entry->SetMetaDataElement(metaKey.get(), val.get());
+                    } else {
+                        LOG(("nsHttpChannel::AddCacheEntryHeaders [this=%p] " \
+                                "clearing metadata for %s", self, token));
+                        metaKey = prefix + nsDependentCString(token);
+                        entry->SetMetaDataElement(metaKey.get(), nullptr);
+                    }
+                }
+                token = nsCRT::strtok(bufData, NS_HTTP_HEADER_SEPS, &bufData);
+            }
+        }
+    }
+
+    // Store the received HTTP head with the cache entry as an element of
+    // the meta data.
+    nsAutoCString head;
+    responseHead->Flatten(head, true);
+    rv = entry->SetMetaDataElement("response-head", head.get());
+    if (NS_FAILED(rv)) return rv;
+    head.Truncate();
+    responseHead->FlattenNetworkOriginalHeaders(head);
+    rv = entry->SetMetaDataElement("original-response-headers", head.get());
+    if (NS_FAILED(rv)) return rv;
+
+    // Indicate we have successfully finished setting metadata on the cache entry.
+    rv = entry->MetaDataReady();
+
+    return rv;
+}
+
+nsresult
+nsHttpChannel::AddCacheEntryHeaders(nsICacheEntry *entry)
+{
+    return DoAddCacheEntryHeaders(this, entry, &mRequestHead, mResponseHead, mSecurityInfo);
+}
+
+inline void
+GetAuthType(const char *challenge, nsCString &authType)
+{
+    const char *p;
+
+    // get the challenge type
+    if ((p = strchr(challenge, ' ')) != nullptr)
+        authType.Assign(challenge, p - challenge);
+    else
+        authType.Assign(challenge);
+}
+
+nsresult
+StoreAuthorizationMetaData(nsICacheEntry *entry, nsHttpRequestHead *requestHead)
+{
+    // Not applicable to proxy authorization...
+    nsAutoCString val;
+    if (NS_FAILED(requestHead->GetHeader(nsHttp::Authorization, val))) {
+        return NS_OK;
+    }
+
+    // eg. [Basic realm="wally world"]
+    nsAutoCString buf;
+    GetAuthType(val.get(), buf);
+    return entry->SetMetaDataElement("auth", buf.get());
+}
+
+// Finalize the cache entry
+//  - may need to rewrite response headers if any headers changed
+//  - may need to recalculate the expiration time if any headers changed
+//  - called only for freshly written cache entries
+nsresult
+nsHttpChannel::FinalizeCacheEntry()
+{
+    LOG(("nsHttpChannel::FinalizeCacheEntry [this=%p]\n", this));
+
+    // Don't update this meta-data on 304
+    if (mStronglyFramed && !mCachedContentIsValid && mCacheEntry) {
+        LOG(("nsHttpChannel::FinalizeCacheEntry [this=%p] Is Strongly Framed\n", this));
+        mCacheEntry->SetMetaDataElement("strongly-framed", "1");
+    }
+
+    if (mResponseHead && mResponseHeadersModified) {
+        // Set the expiration time for this cache entry
+        nsresult rv = UpdateExpirationTime();
+        if (NS_FAILED(rv)) return rv;
+    }
+    return NS_OK;
+}
+
+// Open an output stream to the cache entry and insert a listener tee into
+// the chain of response listeners.
+nsresult
+nsHttpChannel::InstallCacheListener(int64_t offset)
+{
+    nsresult rv;
+
+    LOG(("Preparing to write data into the cache [uri=%s]\n", mSpec.get()));
+
+    MOZ_ASSERT(mCacheEntry);
+    MOZ_ASSERT(mCacheEntryIsWriteOnly || mCachedContentIsPartial);
+    MOZ_ASSERT(mListener);
+
+    nsAutoCString contentEncoding, contentType;
+    mResponseHead->GetHeader(nsHttp::Content_Encoding, contentEncoding);
+    mResponseHead->ContentType(contentType);
+    // If the content is compressible and the server has not compressed it,
+    // mark the cache entry for compression.
+    if (contentEncoding.IsEmpty() &&
+        (contentType.EqualsLiteral(TEXT_HTML) ||
+         contentType.EqualsLiteral(TEXT_PLAIN) ||
+         contentType.EqualsLiteral(TEXT_CSS) ||
+         contentType.EqualsLiteral(TEXT_JAVASCRIPT) ||
+         contentType.EqualsLiteral(TEXT_ECMASCRIPT) ||
+         contentType.EqualsLiteral(TEXT_XML) ||
+         contentType.EqualsLiteral(APPLICATION_JAVASCRIPT) ||
+         contentType.EqualsLiteral(APPLICATION_ECMASCRIPT) ||
+         contentType.EqualsLiteral(APPLICATION_XJAVASCRIPT) ||
+         contentType.EqualsLiteral(APPLICATION_XHTML_XML))) {
+        rv = mCacheEntry->SetMetaDataElement("uncompressed-len", "0");
+        if (NS_FAILED(rv)) {
+            LOG(("unable to mark cache entry for compression"));
+        }
+    }
+
+    LOG(("Trading cache input stream for output stream [channel=%p]", this));
+
+    // We must close the input stream first because cache entries do not
+    // correctly handle having an output stream and input streams open at
+    // the same time.
+    mCacheInputStream.CloseAndRelease();
+
+    nsCOMPtr<nsIOutputStream> out;
+    rv = mCacheEntry->OpenOutputStream(offset, getter_AddRefs(out));
+    if (rv == NS_ERROR_NOT_AVAILABLE) {
+        LOG(("  entry doomed, not writing it [channel=%p]", this));
+        // Entry is already doomed.
+        // This may happen when expiration time is set to past and the entry
+        // has been removed by the background eviction logic.
+        return NS_OK;
+    }
+    if (NS_FAILED(rv)) return rv;
+
+    if (mCacheOnlyMetadata) {
+        LOG(("Not storing content, cacheOnlyMetadata set"));
+        // We must open and then close the output stream of the cache entry.
+        // This way we indicate the content has been written (despite with zero
+        // length) and the entry is now in the ready state with "having data".
+
+        out->Close();
+        return NS_OK;
+    }
+
+    // XXX disk cache does not support overlapped i/o yet
+#if 0
+    // Mark entry valid inorder to allow simultaneous reading...
+    rv = mCacheEntry->MarkValid();
+    if (NS_FAILED(rv)) return rv;
+#endif
+
+    nsCOMPtr<nsIStreamListenerTee> tee =
+        do_CreateInstance(kStreamListenerTeeCID, &rv);
+    if (NS_FAILED(rv)) return rv;
+
+    nsCOMPtr<nsIEventTarget> cacheIOTarget;
+    if (!CacheObserver::UseNewCache()) {
+        nsCOMPtr<nsICacheStorageService> serv =
+            do_GetService("@mozilla.org/netwerk/cache-storage-service;1", &rv);
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        serv->GetIoTarget(getter_AddRefs(cacheIOTarget));
+    }
+
+    if (!cacheIOTarget) {
+        LOG(("nsHttpChannel::InstallCacheListener sync tee %p rv=%x "
+             "cacheIOTarget=%p", tee.get(), rv, cacheIOTarget.get()));
+        rv = tee->Init(mListener, out, nullptr);
+    } else {
+        LOG(("nsHttpChannel::InstallCacheListener async tee %p", tee.get()));
+        rv = tee->InitAsync(mListener, cacheIOTarget, out, nullptr);
+    }
+
+    if (NS_FAILED(rv)) return rv;
+    mListener = tee;
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::InstallOfflineCacheListener(int64_t offset)
+{
+    nsresult rv;
+
+    LOG(("Preparing to write data into the offline cache [uri=%s]\n",
+         mSpec.get()));
+
+    MOZ_ASSERT(mOfflineCacheEntry);
+    MOZ_ASSERT(mListener);
+
+    nsCOMPtr<nsIOutputStream> out;
+    rv = mOfflineCacheEntry->OpenOutputStream(offset, getter_AddRefs(out));
+    if (NS_FAILED(rv)) return rv;
+
+    nsCOMPtr<nsIStreamListenerTee> tee =
+        do_CreateInstance(kStreamListenerTeeCID, &rv);
+    if (NS_FAILED(rv)) return rv;
+
+    rv = tee->Init(mListener, out, nullptr);
+    if (NS_FAILED(rv)) return rv;
+
+    mListener = tee;
+
+    return NS_OK;
+}
+
+void
+nsHttpChannel::ClearBogusContentEncodingIfNeeded()
+{
+    // For .gz files, apache sends both a Content-Type: application/x-gzip
+    // as well as Content-Encoding: gzip, which is completely wrong.  In
+    // this case, we choose to ignore the rogue Content-Encoding header. We
+    // must do this early on so as to prevent it from being seen up stream.
+    // The same problem exists for Content-Encoding: compress in default
+    // Apache installs.
+    nsAutoCString contentType;
+    mResponseHead->ContentType(contentType);
+    if (mResponseHead->HasHeaderValue(nsHttp::Content_Encoding, "gzip") && (
+        contentType.EqualsLiteral(APPLICATION_GZIP) ||
+        contentType.EqualsLiteral(APPLICATION_GZIP2) ||
+        contentType.EqualsLiteral(APPLICATION_GZIP3))) {
+        // clear the Content-Encoding header
+        mResponseHead->ClearHeader(nsHttp::Content_Encoding);
+    }
+    else if (mResponseHead->HasHeaderValue(nsHttp::Content_Encoding, "compress") && (
+             contentType.EqualsLiteral(APPLICATION_COMPRESS) ||
+             contentType.EqualsLiteral(APPLICATION_COMPRESS2))) {
+        // clear the Content-Encoding header
+        mResponseHead->ClearHeader(nsHttp::Content_Encoding);
+    }
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <redirect>
+//-----------------------------------------------------------------------------
+
+nsresult
+nsHttpChannel::SetupReplacementChannel(nsIURI       *newURI,
+                                       nsIChannel   *newChannel,
+                                       bool          preserveMethod,
+                                       uint32_t      redirectFlags)
+{
+    LOG(("nsHttpChannel::SetupReplacementChannel "
+         "[this=%p newChannel=%p preserveMethod=%d]",
+         this, newChannel, preserveMethod));
+
+    nsresult rv =
+      HttpBaseChannel::SetupReplacementChannel(newURI, newChannel,
+                                               preserveMethod, redirectFlags);
+    if (NS_FAILED(rv))
+        return rv;
+
+    nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(newChannel);
+    if (!httpChannel)
+        return NS_OK; // no other options to set
+
+    // convey the mApplyConversion flag (bug 91862)
+    nsCOMPtr<nsIEncodedChannel> encodedChannel = do_QueryInterface(httpChannel);
+    if (encodedChannel)
+        encodedChannel->SetApplyConversion(mApplyConversion);
+
+    // transfer the resume information
+    if (mResuming) {
+        nsCOMPtr<nsIResumableChannel> resumableChannel(do_QueryInterface(newChannel));
+        if (!resumableChannel) {
+            NS_WARNING("Got asked to resume, but redirected to non-resumable channel!");
+            return NS_ERROR_NOT_RESUMABLE;
+        }
+        resumableChannel->ResumeAt(mStartPos, mEntityID);
+    }
+
+    if (!(redirectFlags & nsIChannelEventSink::REDIRECT_STS_UPGRADE) &&
+        mInterceptCache != INTERCEPTED) {
+        // Ensure that internally-redirected channels, or loads with manual
+        // redirect mode cannot be intercepted, which would look like two
+        // separate requests to the nsINetworkInterceptController.
+        if (mRedirectMode != nsIHttpChannelInternal::REDIRECT_MODE_MANUAL ||
+            (redirectFlags & (nsIChannelEventSink::REDIRECT_TEMPORARY |
+                              nsIChannelEventSink::REDIRECT_PERMANENT)) == 0) {
+            nsLoadFlags loadFlags = nsIRequest::LOAD_NORMAL;
+            rv = newChannel->GetLoadFlags(&loadFlags);
+            NS_ENSURE_SUCCESS(rv, rv);
+            loadFlags |= nsIChannel::LOAD_BYPASS_SERVICE_WORKER;
+            rv = newChannel->SetLoadFlags(loadFlags);
+            NS_ENSURE_SUCCESS(rv, rv);
+        }
+    }
+
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::AsyncProcessRedirection(uint32_t redirectType)
+{
+    LOG(("nsHttpChannel::AsyncProcessRedirection [this=%p type=%u]\n",
+        this, redirectType));
+
+    nsAutoCString location;
+
+    // if a location header was not given, then we can't perform the redirect,
+    // so just carry on as though this were a normal response.
+    if (NS_FAILED(mResponseHead->GetHeader(nsHttp::Location, location)))
+        return NS_ERROR_FAILURE;
+
+    // make sure non-ASCII characters in the location header are escaped.
+    nsAutoCString locationBuf;
+    if (NS_EscapeURL(location.get(), -1, esc_OnlyNonASCII, locationBuf))
+        location = locationBuf;
+
+    if (mRedirectionLimit == 0) {
+        LOG(("redirection limit reached!\n"));
+        return NS_ERROR_REDIRECT_LOOP;
+    }
+
+    mRedirectType = redirectType;
+
+    LOG(("redirecting to: %s [redirection-limit=%u]\n",
+        location.get(), uint32_t(mRedirectionLimit)));
+
+    nsresult rv = CreateNewURI(location.get(), getter_AddRefs(mRedirectURI));
+
+    if (NS_FAILED(rv)) {
+        LOG(("Invalid URI for redirect: Location: %s\n", location.get()));
+        return NS_ERROR_CORRUPTED_CONTENT;
+    }
+
+    if (mApplicationCache) {
+        // if we are redirected to a different origin check if there is a fallback
+        // cache entry to fall back to. we don't care about file strict
+        // checking, at least mURI is not a file URI.
+        if (!NS_SecurityCompareURIs(mURI, mRedirectURI, false)) {
+            PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessRedirectionAfterFallback);
+            bool waitingForRedirectCallback;
+            (void)ProcessFallback(&waitingForRedirectCallback);
+            if (waitingForRedirectCallback)
+                return NS_OK;
+            PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessRedirectionAfterFallback);
+        }
+    }
+
+    return ContinueProcessRedirectionAfterFallback(NS_OK);
+}
+
+nsresult
+nsHttpChannel::ContinueProcessRedirectionAfterFallback(nsresult rv)
+{
+    if (NS_SUCCEEDED(rv) && mFallingBack) {
+        // do not continue with redirect processing, fallback is in
+        // progress now.
+        return NS_OK;
+    }
+
+    // Kill the current cache entry if we are redirecting
+    // back to ourself.
+    bool redirectingBackToSameURI = false;
+    if (mCacheEntry && mCacheEntryIsWriteOnly &&
+        NS_SUCCEEDED(mURI->Equals(mRedirectURI, &redirectingBackToSameURI)) &&
+        redirectingBackToSameURI)
+            mCacheEntry->AsyncDoom(nullptr);
+
+    bool hasRef = false;
+    rv = mRedirectURI->GetHasRef(&hasRef);
+
+    // move the reference of the old location to the new one if the new
+    // one has none.
+    if (NS_SUCCEEDED(rv) && !hasRef) {
+        nsAutoCString ref;
+        mURI->GetRef(ref);
+        if (!ref.IsEmpty()) {
+            // NOTE: SetRef will fail if mRedirectURI is immutable
+            // (e.g. an about: URI)... Oh well.
+            mRedirectURI->SetRef(ref);
+        }
+    }
+
+    bool rewriteToGET = ShouldRewriteRedirectToGET(mRedirectType,
+                                                   mRequestHead.ParsedMethod());
+
+    // prompt if the method is not safe (such as POST, PUT, DELETE, ...)
+    if (!rewriteToGET && !mRequestHead.IsSafeMethod()) {
+        rv = PromptTempRedirect();
+        if (NS_FAILED(rv)) return rv;
+    }
+
+    nsCOMPtr<nsIIOService> ioService;
+    rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
+    if (NS_FAILED(rv)) return rv;
+
+    nsCOMPtr<nsIChannel> newChannel;
+    rv = NS_NewChannelInternal(getter_AddRefs(newChannel),
+                               mRedirectURI,
+                               mLoadInfo,
+                               nullptr, // aLoadGroup
+                               nullptr, // aCallbacks
+                               nsIRequest::LOAD_NORMAL,
+                               ioService);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    uint32_t redirectFlags;
+    if (nsHttp::IsPermanentRedirect(mRedirectType))
+        redirectFlags = nsIChannelEventSink::REDIRECT_PERMANENT;
+    else
+        redirectFlags = nsIChannelEventSink::REDIRECT_TEMPORARY;
+
+    rv = SetupReplacementChannel(mRedirectURI, newChannel,
+                                 !rewriteToGET, redirectFlags);
+    if (NS_FAILED(rv)) return rv;
+
+    // verify that this is a legal redirect
+    mRedirectChannel = newChannel;
+
+    PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessRedirection);
+    rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, redirectFlags);
+
+    if (NS_SUCCEEDED(rv))
+        rv = WaitForRedirectCallback();
+
+    if (NS_FAILED(rv)) {
+        AutoRedirectVetoNotifier notifier(this);
+        PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessRedirection);
+    }
+
+    return rv;
+}
+
+nsresult
+nsHttpChannel::ContinueProcessRedirection(nsresult rv)
+{
+    AutoRedirectVetoNotifier notifier(this);
+
+    LOG(("nsHttpChannel::ContinueProcessRedirection [rv=%x,this=%p]\n", rv,
+         this));
+    if (NS_FAILED(rv))
+        return rv;
+
+    NS_PRECONDITION(mRedirectChannel, "No redirect channel?");
+
+    // Make sure to do this after we received redirect veto answer,
+    // i.e. after all sinks had been notified
+    mRedirectChannel->SetOriginalURI(mOriginalURI);
+
+    // And now, the deprecated way
+    nsCOMPtr<nsIHttpEventSink> httpEventSink;
+    GetCallback(httpEventSink);
+    if (httpEventSink) {
+        // NOTE: nsIHttpEventSink is only used for compatibility with pre-1.8
+        // versions.
+        rv = httpEventSink->OnRedirect(this, mRedirectChannel);
+        if (NS_FAILED(rv))
+            return rv;
+    }
+    // XXX we used to talk directly with the script security manager, but that
+    // should really be handled by the event sink implementation.
+
+    // begin loading the new channel
+    if (mLoadInfo && mLoadInfo->GetEnforceSecurity()) {
+        MOZ_ASSERT(!mListenerContext, "mListenerContext should be null!");
+        rv = mRedirectChannel->AsyncOpen2(mListener);
+    }
+    else {
+        rv = mRedirectChannel->AsyncOpen(mListener, mListenerContext);
+    }
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    // close down this channel
+    Cancel(NS_BINDING_REDIRECTED);
+
+    notifier.RedirectSucceeded();
+
+    ReleaseListeners();
+
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <auth>
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP nsHttpChannel::OnAuthAvailable()
+{
+    LOG(("nsHttpChannel::OnAuthAvailable [this=%p]", this));
+
+    // setting mAuthRetryPending flag and resuming the transaction
+    // triggers process of throwing away the unauthenticated data already
+    // coming from the network
+    mAuthRetryPending = true;
+    mProxyAuthPending = false;
+    LOG(("Resuming the transaction, we got credentials from user"));
+    mTransactionPump->Resume();
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP nsHttpChannel::OnAuthCancelled(bool userCancel)
+{
+    LOG(("nsHttpChannel::OnAuthCancelled [this=%p]", this));
+
+    if (mTransactionPump) {
+        // If the channel is trying to authenticate to a proxy and
+        // that was canceled we cannot show the http response body
+        // from the 40x as that might mislead the user into thinking
+        // it was a end host response instead of a proxy reponse.
+        // This must check explicitly whether a proxy auth was being done
+        // because we do want to show the content if this is an error from
+        // the origin server.
+        if (mProxyAuthPending)
+            Cancel(NS_ERROR_PROXY_CONNECTION_REFUSED);
+
+        // ensure call of OnStartRequest of the current listener here,
+        // it would not be called otherwise at all
+        nsresult rv = CallOnStartRequest();
+
+        // drop mAuthRetryPending flag and resume the transaction
+        // this resumes load of the unauthenticated content data (which
+        // may have been canceled if we don't want to show it)
+        mAuthRetryPending = false;
+        LOG(("Resuming the transaction, user cancelled the auth dialog"));
+        mTransactionPump->Resume();
+
+        if (NS_FAILED(rv))
+            mTransactionPump->Cancel(rv);
+    }
+
+    mProxyAuthPending = false;
+    return NS_OK;
+}
+
+NS_IMETHODIMP nsHttpChannel::CloseStickyConnection()
+{
+    LOG(("nsHttpChannel::CloseStickyConnection this=%p", this));
+
+    // Require we are between OnStartRequest and OnStopRequest, because
+    // what we do here takes effect in OnStopRequest (not reusing the
+    // connection for next authentication round).
+    if (!mIsPending) {
+        LOG(("  channel not pending"));
+        NS_ERROR("CloseStickyConnection not called before OnStopRequest, won't have any effect");
+        return NS_ERROR_UNEXPECTED;
+    }
+
+    MOZ_ASSERT(mTransaction);
+    if (!mTransaction) {
+        return NS_ERROR_UNEXPECTED;
+    }
+
+    if (!(mCaps & NS_HTTP_STICKY_CONNECTION ||
+          mTransaction->Caps() & NS_HTTP_STICKY_CONNECTION)) {
+        LOG(("  not sticky"));
+        return NS_OK;
+    }
+
+    RefPtr<nsAHttpConnection> conn = mTransaction->GetConnectionReference();
+    if (!conn) {
+        LOG(("  no connection"));
+        return NS_OK;
+    }
+
+    // This turns the IsPersistent() indicator on the connection to false,
+    // and makes us throw it away in OnStopRequest.
+    conn->DontReuse();
+    return NS_OK;
+}
+
+NS_IMETHODIMP nsHttpChannel::ConnectionRestartable(bool aRestartable)
+{
+    LOG(("nsHttpChannel::ConnectionRestartable this=%p, restartable=%d",
+         this, aRestartable));
+    mAuthConnectionRestartable = aRestartable;
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsISupports
+//-----------------------------------------------------------------------------
+
+NS_IMPL_ADDREF_INHERITED(nsHttpChannel, HttpBaseChannel)
+NS_IMPL_RELEASE_INHERITED(nsHttpChannel, HttpBaseChannel)
+
+NS_INTERFACE_MAP_BEGIN(nsHttpChannel)
+    NS_INTERFACE_MAP_ENTRY(nsIRequest)
+    NS_INTERFACE_MAP_ENTRY(nsIChannel)
+    NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
+    NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
+    NS_INTERFACE_MAP_ENTRY(nsIHttpChannel)
+    NS_INTERFACE_MAP_ENTRY(nsICacheInfoChannel)
+    NS_INTERFACE_MAP_ENTRY(nsICachingChannel)
+    NS_INTERFACE_MAP_ENTRY(nsIClassOfService)
+    NS_INTERFACE_MAP_ENTRY(nsIUploadChannel)
+    NS_INTERFACE_MAP_ENTRY(nsIFormPOSTActionChannel)
+    NS_INTERFACE_MAP_ENTRY(nsIUploadChannel2)
+    NS_INTERFACE_MAP_ENTRY(nsICacheEntryOpenCallback)
+    NS_INTERFACE_MAP_ENTRY(nsIHttpChannelInternal)
+    NS_INTERFACE_MAP_ENTRY(nsIResumableChannel)
+    NS_INTERFACE_MAP_ENTRY(nsITransportEventSink)
+    NS_INTERFACE_MAP_ENTRY(nsISupportsPriority)
+    NS_INTERFACE_MAP_ENTRY(nsIProtocolProxyCallback)
+    NS_INTERFACE_MAP_ENTRY(nsIProxiedChannel)
+    NS_INTERFACE_MAP_ENTRY(nsIHttpAuthenticableChannel)
+    NS_INTERFACE_MAP_ENTRY(nsIApplicationCacheContainer)
+    NS_INTERFACE_MAP_ENTRY(nsIApplicationCacheChannel)
+    NS_INTERFACE_MAP_ENTRY(nsIAsyncVerifyRedirectCallback)
+    NS_INTERFACE_MAP_ENTRY(nsIThreadRetargetableRequest)
+    NS_INTERFACE_MAP_ENTRY(nsIThreadRetargetableStreamListener)
+    NS_INTERFACE_MAP_ENTRY(nsIDNSListener)
+    NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+    NS_INTERFACE_MAP_ENTRY(nsICorsPreflightCallback)
+    NS_INTERFACE_MAP_ENTRY(nsIHstsPrimingCallback)
+    NS_INTERFACE_MAP_ENTRY(nsIChannelWithDivertableParentListener)
+    // we have no macro that covers this case.
+    if (aIID.Equals(NS_GET_IID(nsHttpChannel)) ) {
+        AddRef();
+        *aInstancePtr = this;
+        return NS_OK;
+    } else
+NS_INTERFACE_MAP_END_INHERITING(HttpBaseChannel)
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIRequest
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::Cancel(nsresult status)
+{
+    MOZ_ASSERT(NS_IsMainThread());
+    // We should never have a pump open while a CORS preflight is in progress.
+    MOZ_ASSERT_IF(mPreflightChannel, !mCachePump);
+
+    LOG(("nsHttpChannel::Cancel [this=%p status=%x]\n", this, status));
+    if (mCanceled) {
+        LOG(("  ignoring; already canceled\n"));
+        return NS_OK;
+    }
+    if (mWaitingForRedirectCallback) {
+        LOG(("channel canceled during wait for redirect callback"));
+    }
+    mCanceled = true;
+    mStatus = status;
+    if (mProxyRequest)
+        mProxyRequest->Cancel(status);
+    if (mTransaction)
+        gHttpHandler->CancelTransaction(mTransaction, status);
+    if (mTransactionPump)
+        mTransactionPump->Cancel(status);
+    mCacheInputStream.CloseAndRelease();
+    if (mCachePump)
+        mCachePump->Cancel(status);
+    if (mAuthProvider)
+        mAuthProvider->Cancel(status);
+    if (mPreflightChannel)
+        mPreflightChannel->Cancel(status);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::Suspend()
+{
+    nsresult rv = SuspendInternal();
+
+    nsresult rvParentChannel = NS_OK;
+    if (mParentChannel) {
+      rvParentChannel = mParentChannel->SuspendMessageDiversion();
+    }
+
+    return NS_FAILED(rv) ? rv : rvParentChannel;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::Resume()
+{
+    nsresult rv = ResumeInternal();
+
+    nsresult rvParentChannel = NS_OK;
+    if (mParentChannel) {
+      rvParentChannel = mParentChannel->ResumeMessageDiversion();
+    }
+
+    return NS_FAILED(rv) ? rv : rvParentChannel;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetSecurityInfo(nsISupports **securityInfo)
+{
+    NS_ENSURE_ARG_POINTER(securityInfo);
+    *securityInfo = mSecurityInfo;
+    NS_IF_ADDREF(*securityInfo);
+    return NS_OK;
+}
+
+// If any of the functions that AsyncOpen calls returns immediately an error
+// AsyncAbort(which calls onStart/onStopRequest) does not need to be call.
+// To be sure that they are not call ReleaseListeners() is called.
+// If AsyncOpen returns NS_OK, after that point AsyncAbort must be called on
+// any error.
+NS_IMETHODIMP
+nsHttpChannel::AsyncOpen(nsIStreamListener *listener, nsISupports *context)
+{
+    MOZ_ASSERT(!mLoadInfo ||
+               mLoadInfo->GetSecurityMode() == 0 ||
+               mLoadInfo->GetInitialSecurityCheckDone() ||
+               (mLoadInfo->GetSecurityMode() == nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL &&
+                nsContentUtils::IsSystemPrincipal(mLoadInfo->LoadingPrincipal())),
+               "security flags in loadInfo but asyncOpen2() not called");
+
+    LOG(("nsHttpChannel::AsyncOpen [this=%p]\n", this));
+
+    NS_CompareLoadInfoAndLoadContext(this);
+
+#ifdef DEBUG
+    AssertPrivateBrowsingId();
+#endif
+
+    NS_ENSURE_ARG_POINTER(listener);
+    NS_ENSURE_TRUE(!mIsPending, NS_ERROR_IN_PROGRESS);
+    NS_ENSURE_TRUE(!mWasOpened, NS_ERROR_ALREADY_OPENED);
+
+    nsresult rv;
+
+    MOZ_ASSERT(NS_IsMainThread());
+
+    if (!gHttpHandler->Active()) {
+        LOG(("  after HTTP shutdown..."));
+        ReleaseListeners();
+        return NS_ERROR_NOT_AVAILABLE;
+    }
+
+    rv = NS_CheckPortSafety(mURI);
+    if (NS_FAILED(rv)) {
+        ReleaseListeners();
+        return rv;
+    }
+
+    if (mInterceptCache != INTERCEPTED && ShouldIntercept()) {
+        mInterceptCache = MAYBE_INTERCEPT;
+        SetCouldBeSynthesized();
+    }
+
+    // Remember the cookie header that was set, if any
+    nsAutoCString cookieHeader;
+    if (NS_SUCCEEDED(mRequestHead.GetHeader(nsHttp::Cookie, cookieHeader))) {
+        mUserSetCookieHeader = cookieHeader;
+    }
+
+    AddCookiesToRequest();
+
+    // After we notify any observers (on-opening-request, loadGroup, etc) we
+    // must return NS_OK and return any errors asynchronously via
+    // OnStart/OnStopRequest.  Observers may add a reference to the channel
+    // and expect to get OnStopRequest so they know when to drop the reference,
+    // etc.
+
+    // notify "http-on-opening-request" observers, but not if this is a redirect
+    if (!(mLoadFlags & LOAD_REPLACE)) {
+        gHttpHandler->OnOpeningRequest(this);
+    }
+
+    // Set user agent override
+    HttpBaseChannel::SetDocshellUserAgentOverride();
+
+    mIsPending = true;
+    mWasOpened = true;
+
+    mListener = listener;
+    mListenerContext = context;
+
+    if (mLoadGroup)
+        mLoadGroup->AddRequest(this, nullptr);
+
+    // record asyncopen time unconditionally and clear it if we
+    // don't want it after OnModifyRequest() weighs in. But waiting for
+    // that to complete would mean we don't include proxy resolution in the
+    // timing.
+    mAsyncOpenTime = TimeStamp::Now();
+
+    // Remember we have Authorization header set here.  We need to check on it
+    // just once and early, AsyncOpen is the best place.
+    mCustomAuthHeader = mRequestHead.HasHeader(nsHttp::Authorization);
+
+    // The common case for HTTP channels is to begin proxy resolution and return
+    // at this point. The only time we know mProxyInfo already is if we're
+    // proxying a non-http protocol like ftp.
+    if (!mProxyInfo && NS_SUCCEEDED(ResolveProxy())) {
+        return NS_OK;
+    }
+
+    rv = BeginConnect();
+    if (NS_FAILED(rv)) {
+        CloseCacheEntry(false);
+        AsyncAbort(rv);
+    }
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::AsyncOpen2(nsIStreamListener *aListener)
+{
+  nsCOMPtr<nsIStreamListener> listener = aListener;
+  nsresult rv = nsContentSecurityManager::doContentSecurityCheck(this, listener);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+      ReleaseListeners();
+      return rv;
+  }
+  return AsyncOpen(listener, nullptr);
+}
+
+// BeginConnect() SHOULD NOT call AsyncAbort(). AsyncAbort will be called by
+// functions that called BeginConnect if needed. Only AsyncOpen and
+// OnProxyAvailable ever call BeginConnect.
+nsresult
+nsHttpChannel::BeginConnect()
+{
+    LOG(("nsHttpChannel::BeginConnect [this=%p]\n", this));
+    nsresult rv;
+
+    // Construct connection info object
+    nsAutoCString host;
+    nsAutoCString scheme;
+    int32_t port = -1;
+    bool isHttps = false;
+
+    rv = mURI->GetScheme(scheme);
+    if (NS_SUCCEEDED(rv))
+        rv = mURI->SchemeIs("https", &isHttps);
+    if (NS_SUCCEEDED(rv))
+        rv = mURI->GetAsciiHost(host);
+    if (NS_SUCCEEDED(rv))
+        rv = mURI->GetPort(&port);
+    if (NS_SUCCEEDED(rv))
+        mURI->GetUsername(mUsername);
+    if (NS_SUCCEEDED(rv))
+        rv = mURI->GetAsciiSpec(mSpec);
+    if (NS_FAILED(rv)) {
+        return rv;
+    }
+
+    // Reject the URL if it doesn't specify a host
+    if (host.IsEmpty()) {
+        rv = NS_ERROR_MALFORMED_URI;
+        return rv;
+    }
+    LOG(("host=%s port=%d\n", host.get(), port));
+    LOG(("uri=%s\n", mSpec.get()));
+
+    nsCOMPtr<nsProxyInfo> proxyInfo;
+    if (mProxyInfo)
+        proxyInfo = do_QueryInterface(mProxyInfo);
+
+    mRequestHead.SetHTTPS(isHttps);
+    mRequestHead.SetOrigin(scheme, host, port);
+
+    SetDoNotTrack();
+
+    NeckoOriginAttributes originAttributes;
+    NS_GetOriginAttributes(this, originAttributes);
+
+    RefPtr<AltSvcMapping> mapping;
+    if (!mConnectionInfo && mAllowAltSvc && // per channel
+        !(mLoadFlags & LOAD_FRESH_CONNECTION) &&
+        (scheme.Equals(NS_LITERAL_CSTRING("http")) ||
+         scheme.Equals(NS_LITERAL_CSTRING("https"))) &&
+        (!proxyInfo || proxyInfo->IsDirect()) &&
+        (mapping = gHttpHandler->GetAltServiceMapping(scheme,
+                                                      host, port,
+                                                      mPrivateBrowsing))) {
+        LOG(("nsHttpChannel %p Alt Service Mapping Found %s://%s:%d [%s]\n",
+             this, scheme.get(), mapping->AlternateHost().get(),
+             mapping->AlternatePort(), mapping->HashKey().get()));
+
+        if (!(mLoadFlags & LOAD_ANONYMOUS) && !mPrivateBrowsing) {
+            nsAutoCString altUsedLine(mapping->AlternateHost());
+            bool defaultPort = mapping->AlternatePort() ==
+                (isHttps ? NS_HTTPS_DEFAULT_PORT : NS_HTTP_DEFAULT_PORT);
+            if (!defaultPort) {
+                altUsedLine.AppendLiteral(":");
+                altUsedLine.AppendInt(mapping->AlternatePort());
+            }
+            mRequestHead.SetHeader(nsHttp::Alternate_Service_Used, altUsedLine);
+        }
+
+        nsCOMPtr<nsIConsoleService> consoleService =
+            do_GetService(NS_CONSOLESERVICE_CONTRACTID);
+        if (consoleService) {
+            nsAutoString message(NS_LITERAL_STRING("Alternate Service Mapping found: "));
+            AppendASCIItoUTF16(scheme.get(), message);
+            message.Append(NS_LITERAL_STRING("://"));
+            AppendASCIItoUTF16(host.get(), message);
+            message.Append(NS_LITERAL_STRING(":"));
+            message.AppendInt(port);
+            message.Append(NS_LITERAL_STRING(" to "));
+            AppendASCIItoUTF16(scheme.get(), message);
+            message.Append(NS_LITERAL_STRING("://"));
+            AppendASCIItoUTF16(mapping->AlternateHost().get(), message);
+            message.Append(NS_LITERAL_STRING(":"));
+            message.AppendInt(mapping->AlternatePort());
+            consoleService->LogStringMessage(message.get());
+        }
+
+        LOG(("nsHttpChannel %p Using connection info from altsvc mapping", this));
+        mapping->GetConnectionInfo(getter_AddRefs(mConnectionInfo), proxyInfo, originAttributes);
+        Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC, true);
+        Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC_OE, !isHttps);
+    } else if (mConnectionInfo) {
+        LOG(("nsHttpChannel %p Using channel supplied connection info", this));
+        Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC, false);
+    } else {
+        LOG(("nsHttpChannel %p Using default connection info", this));
+
+        mConnectionInfo = new nsHttpConnectionInfo(host, port, EmptyCString(), mUsername, proxyInfo,
+                                                   originAttributes, isHttps);
+        Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC, false);
+    }
+
+    // Set network interface id only when it's not empty to avoid
+    // rebuilding hash key.
+    if (!mNetworkInterfaceId.IsEmpty()) {
+        mConnectionInfo->SetNetworkInterfaceId(mNetworkInterfaceId);
+    }
+
+    mAuthProvider =
+        do_CreateInstance("@mozilla.org/network/http-channel-auth-provider;1",
+                          &rv);
+    if (NS_SUCCEEDED(rv))
+        rv = mAuthProvider->Init(this);
+    if (NS_FAILED(rv)) {
+        return rv;
+    }
+
+    // check to see if authorization headers should be included
+    // mCustomAuthHeader is set in AsyncOpen if we find Authorization header
+    mAuthProvider->AddAuthorizationHeaders(mCustomAuthHeader);
+
+    // notify "http-on-modify-request" observers
+    CallOnModifyRequestObservers();
+
+    SetLoadGroupUserAgentOverride();
+
+    // Check if request was cancelled during on-modify-request or on-useragent.
+    if (mCanceled) {
+        return mStatus;
+    }
+
+    if (mSuspendCount) {
+        LOG(("Waiting until resume BeginConnect [this=%p]\n", this));
+        MOZ_ASSERT(!mCallOnResume);
+        mCallOnResume = &nsHttpChannel::HandleBeginConnectContinue;
+        return NS_OK;
+    }
+
+    return BeginConnectContinue();
+}
+
+void
+nsHttpChannel::HandleBeginConnectContinue()
+{
+    NS_PRECONDITION(!mCallOnResume, "How did that happen?");
+    nsresult rv;
+
+    if (mSuspendCount) {
+        LOG(("Waiting until resume BeginConnect [this=%p]\n", this));
+        mCallOnResume = &nsHttpChannel::HandleBeginConnectContinue;
+        return;
+    }
+
+    LOG(("nsHttpChannel::HandleBeginConnectContinue [this=%p]\n", this));
+    rv = BeginConnectContinue();
+    if (NS_FAILED(rv)) {
+        CloseCacheEntry(false);
+        Unused << AsyncAbort(rv);
+    }
+}
+
+nsresult
+nsHttpChannel::BeginConnectContinue()
+{
+    nsresult rv;
+
+    // Check if request was cancelled during suspend AFTER on-modify-request or
+    // on-useragent.
+    if (mCanceled) {
+        return mStatus;
+    }
+
+    // Check to see if we should redirect this channel elsewhere by
+    // nsIHttpChannel.redirectTo API request
+    if (mAPIRedirectToURI) {
+        return AsyncCall(&nsHttpChannel::HandleAsyncAPIRedirect);
+    }
+    // Check to see if this principal exists on local blocklists.
+    RefPtr<nsChannelClassifier> channelClassifier = new nsChannelClassifier();
+    if (mLoadFlags & LOAD_CLASSIFY_URI) {
+        nsCOMPtr<nsIURIClassifier> classifier = do_GetService(NS_URICLASSIFIERSERVICE_CONTRACTID);
+        bool tpEnabled = false;
+        channelClassifier->ShouldEnableTrackingProtection(this, &tpEnabled);
+        if (classifier && tpEnabled) {
+            // We skip speculative connections by setting mLocalBlocklist only
+            // when tracking protection is enabled. Though we could do this for
+            // both phishing and malware, it is not necessary for correctness,
+            // since no network events will be received while the
+            // nsChannelClassifier is in progress. See bug 1122691.
+            nsCOMPtr<nsIURI> uri;
+            rv = GetURI(getter_AddRefs(uri));
+            if (NS_SUCCEEDED(rv) && uri) {
+                nsAutoCString tables;
+                Preferences::GetCString("urlclassifier.trackingTable", &tables);
+                nsAutoCString results;
+                rv = classifier->ClassifyLocalWithTables(uri, tables, results);
+                if (NS_SUCCEEDED(rv) && !results.IsEmpty()) {
+                    LOG(("nsHttpChannel::ClassifyLocalWithTables found "
+                         "uri on local tracking blocklist [this=%p]",
+                         this));
+                    mLocalBlocklist = true;
+                } else {
+                    LOG(("nsHttpChannel::ClassifyLocalWithTables no result "
+                         "found [this=%p]", this));
+                }
+            }
+        }
+    }
+
+    // If mTimingEnabled flag is not set after OnModifyRequest() then
+    // clear the already recorded AsyncOpen value for consistency.
+    if (!mTimingEnabled)
+        mAsyncOpenTime = TimeStamp();
+
+    // when proxying only use the pipeline bit if ProxyPipelining() allows it.
+    if (!mConnectionInfo->UsingConnect() && mConnectionInfo->UsingHttpProxy()) {
+        mCaps &= ~NS_HTTP_ALLOW_PIPELINING;
+        if (gHttpHandler->ProxyPipelining())
+            mCaps |= NS_HTTP_ALLOW_PIPELINING;
+    }
+
+    // if this somehow fails we can go on without it
+    gHttpHandler->AddConnectionHeader(&mRequestHead, mCaps);
+
+    if (mLoadFlags & VALIDATE_ALWAYS || BYPASS_LOCAL_CACHE(mLoadFlags))
+        mCaps |= NS_HTTP_REFRESH_DNS;
+
+    if (!mLocalBlocklist && !mConnectionInfo->UsingHttpProxy() &&
+        !(mLoadFlags & (LOAD_NO_NETWORK_IO | LOAD_ONLY_FROM_CACHE))) {
+        // Start a DNS lookup very early in case the real open is queued the DNS can
+        // happen in parallel. Do not do so in the presence of an HTTP proxy as
+        // all lookups other than for the proxy itself are done by the proxy.
+        // Also we don't do a lookup if the LOAD_NO_NETWORK_IO or
+        // LOAD_ONLY_FROM_CACHE flags are set.
+        //
+        // We keep the DNS prefetch object around so that we can retrieve
+        // timing information from it. There is no guarantee that we actually
+        // use the DNS prefetch data for the real connection, but as we keep
+        // this data around for 3 minutes by default, this should almost always
+        // be correct, and even when it isn't, the timing still represents _a_
+        // valid DNS lookup timing for the site, even if it is not _the_
+        // timing we used.
+        LOG(("nsHttpChannel::BeginConnect [this=%p] prefetching%s\n",
+             this, mCaps & NS_HTTP_REFRESH_DNS ? ", refresh requested" : ""));
+        mDNSPrefetch = new nsDNSPrefetch(mURI, this, mTimingEnabled);
+        mDNSPrefetch->PrefetchHigh(mCaps & NS_HTTP_REFRESH_DNS);
+    }
+
+    // Adjust mCaps according to our request headers:
+    //  - If "Connection: close" is set as a request header, then do not bother
+    //    trying to establish a keep-alive connection.
+    if (mRequestHead.HasHeaderValue(nsHttp::Connection, "close"))
+        mCaps &= ~(NS_HTTP_ALLOW_KEEPALIVE | NS_HTTP_ALLOW_PIPELINING);
+
+    if (gHttpHandler->CriticalRequestPrioritization()) {
+        if (mClassOfService & nsIClassOfService::Leader) {
+            mCaps |= NS_HTTP_LOAD_AS_BLOCKING;
+        }
+        if (mClassOfService & nsIClassOfService::Unblocked) {
+            mCaps |= NS_HTTP_LOAD_UNBLOCKED;
+        }
+    }
+
+    // Force-Reload should reset the persistent connection pool for this host
+    if (mLoadFlags & LOAD_FRESH_CONNECTION) {
+        // just the initial document resets the whole pool
+        if (mLoadFlags & LOAD_INITIAL_DOCUMENT_URI) {
+            gHttpHandler->ConnMgr()->ClearAltServiceMappings();
+            gHttpHandler->ConnMgr()->DoShiftReloadConnectionCleanup(mConnectionInfo);
+        }
+        mCaps &= ~NS_HTTP_ALLOW_PIPELINING;
+    }
+
+    // We may have been cancelled already, either by on-modify-request
+    // listeners or load group observers; in that case, we should not send the
+    // request to the server
+    if (mCanceled) {
+        return mStatus;
+    }
+
+    if (!(mLoadFlags & LOAD_CLASSIFY_URI)) {
+        return ContinueBeginConnectWithResult();
+    }
+
+    // mLocalBlocklist is true only if tracking protection is enabled and the
+    // URI is a tracking domain, it makes no guarantees about phishing or
+    // malware, so if LOAD_CLASSIFY_URI is true we must call
+    // nsChannelClassifier to catch phishing and malware URIs.
+    bool callContinueBeginConnect = true;
+    if (!mLocalBlocklist) {
+        // Here we call ContinueBeginConnectWithResult and not
+        // ContinueBeginConnect so that in the case of an error we do not start
+        // channelClassifier.
+        rv = ContinueBeginConnectWithResult();
+        if (NS_FAILED(rv)) {
+            return rv;
+        }
+        callContinueBeginConnect = false;
+    }
+    // nsChannelClassifier calls ContinueBeginConnect if it has not already
+    // been called, after optionally cancelling the channel once we have a
+    // remote verdict. We call a concrete class instead of an nsI* that might
+    // be overridden.
+    LOG(("nsHttpChannel::Starting nsChannelClassifier %p [this=%p]",
+         channelClassifier.get(), this));
+    channelClassifier->Start(this);
+    if (callContinueBeginConnect) {
+        return ContinueBeginConnectWithResult();
+    }
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetEncodedBodySize(uint64_t *aEncodedBodySize)
+{
+    if (mCacheEntry && !mCacheEntryIsWriteOnly) {
+        int64_t dataSize = 0;
+        mCacheEntry->GetDataSize(&dataSize);
+        *aEncodedBodySize = dataSize;
+    } else {
+        *aEncodedBodySize = mLogicalOffset;
+    }
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIHttpChannelInternal
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::SetupFallbackChannel(const char *aFallbackKey)
+{
+    ENSURE_CALLED_BEFORE_CONNECT();
+
+    LOG(("nsHttpChannel::SetupFallbackChannel [this=%p, key=%s]\n",
+         this, aFallbackKey));
+    mFallbackChannel = true;
+    mFallbackKey = aFallbackKey;
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::ForceIntercepted(uint64_t aInterceptionID)
+{
+    ENSURE_CALLED_BEFORE_ASYNC_OPEN();
+
+    if (NS_WARN_IF(mLoadFlags & LOAD_BYPASS_SERVICE_WORKER)) {
+        return NS_ERROR_NOT_AVAILABLE;
+    }
+
+    MarkIntercepted();
+    mResponseCouldBeSynthesized = true;
+    mInterceptionID = aInterceptionID;
+    return NS_OK;
+}
+
+mozilla::net::nsHttpChannel*
+nsHttpChannel::QueryHttpChannelImpl(void)
+{
+  return this;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsISupportsPriority
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::SetPriority(int32_t value)
+{
+    int16_t newValue = clamped<int32_t>(value, INT16_MIN, INT16_MAX);
+    if (mPriority == newValue)
+        return NS_OK;
+    mPriority = newValue;
+    if (mTransaction)
+        gHttpHandler->RescheduleTransaction(mTransaction, mPriority);
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::ContinueBeginConnectWithResult()
+{
+    LOG(("nsHttpChannel::ContinueBeginConnectWithResult [this=%p]", this));
+    NS_PRECONDITION(!mCallOnResume, "How did that happen?");
+
+    nsresult rv;
+
+    if (mSuspendCount) {
+        LOG(("Waiting until resume to do async connect [this=%p]\n", this));
+        mCallOnResume = &nsHttpChannel::ContinueBeginConnect;
+        rv = NS_OK;
+    } else if (mCanceled) {
+        // We may have been cancelled already, by nsChannelClassifier in that
+        // case, we should not send the request to the server
+        rv = mStatus;
+    } else {
+        rv = Connect();
+    }
+
+    LOG(("nsHttpChannel::ContinueBeginConnectWithResult result [this=%p rv=%x "
+         "mCanceled=%i]\n", this, rv, mCanceled));
+    return rv;
+}
+
+void
+nsHttpChannel::ContinueBeginConnect()
+{
+    nsresult rv = ContinueBeginConnectWithResult();
+    if (NS_FAILED(rv)) {
+        CloseCacheEntry(false);
+        AsyncAbort(rv);
+    }
+}
+
+//-----------------------------------------------------------------------------
+// HttpChannel::nsIClassOfService
+//-----------------------------------------------------------------------------
+NS_IMETHODIMP
+nsHttpChannel::SetClassFlags(uint32_t inFlags)
+{
+    mClassOfService = inFlags;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::AddClassFlags(uint32_t inFlags)
+{
+    mClassOfService |= inFlags;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::ClearClassFlags(uint32_t inFlags)
+{
+    mClassOfService &= ~inFlags;
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIProtocolProxyCallback
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::OnProxyAvailable(nsICancelable *request, nsIChannel *channel,
+                                nsIProxyInfo *pi, nsresult status)
+{
+    LOG(("nsHttpChannel::OnProxyAvailable [this=%p pi=%p status=%x mStatus=%x]\n",
+         this, pi, status, mStatus));
+    mProxyRequest = nullptr;
+
+    nsresult rv;
+
+    // If status is a failure code, then it means that we failed to resolve
+    // proxy info.  That is a non-fatal error assuming it wasn't because the
+    // request was canceled.  We just failover to DIRECT when proxy resolution
+    // fails (failure can mean that the PAC URL could not be loaded).
+
+    if (NS_SUCCEEDED(status))
+        mProxyInfo = pi;
+
+    if (!gHttpHandler->Active()) {
+        LOG(("nsHttpChannel::OnProxyAvailable [this=%p] "
+             "Handler no longer active.\n", this));
+        rv = NS_ERROR_NOT_AVAILABLE;
+    }
+    else {
+        rv = BeginConnect();
+    }
+
+    if (NS_FAILED(rv)) {
+        CloseCacheEntry(false);
+        AsyncAbort(rv);
+    }
+    return rv;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIProxiedChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetProxyInfo(nsIProxyInfo **result)
+{
+    if (!mConnectionInfo)
+        *result = mProxyInfo;
+    else
+        *result = mConnectionInfo->ProxyInfo();
+    NS_IF_ADDREF(*result);
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsITimedChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetDomainLookupStart(TimeStamp* _retval) {
+    if (mTransaction)
+        *_retval = mTransaction->GetDomainLookupStart();
+    else
+        *_retval = mTransactionTimings.domainLookupStart;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetDomainLookupEnd(TimeStamp* _retval) {
+    if (mTransaction)
+        *_retval = mTransaction->GetDomainLookupEnd();
+    else
+        *_retval = mTransactionTimings.domainLookupEnd;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetConnectStart(TimeStamp* _retval) {
+    if (mTransaction)
+        *_retval = mTransaction->GetConnectStart();
+    else
+        *_retval = mTransactionTimings.connectStart;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetConnectEnd(TimeStamp* _retval) {
+    if (mTransaction)
+        *_retval = mTransaction->GetConnectEnd();
+    else
+        *_retval = mTransactionTimings.connectEnd;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetRequestStart(TimeStamp* _retval) {
+    if (mTransaction)
+        *_retval = mTransaction->GetRequestStart();
+    else
+        *_retval = mTransactionTimings.requestStart;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetResponseStart(TimeStamp* _retval) {
+    if (mTransaction)
+        *_retval = mTransaction->GetResponseStart();
+    else
+        *_retval = mTransactionTimings.responseStart;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetResponseEnd(TimeStamp* _retval) {
+    if (mTransaction)
+        *_retval = mTransaction->GetResponseEnd();
+    else
+        *_retval = mTransactionTimings.responseEnd;
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIHttpAuthenticableChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetIsSSL(bool *aIsSSL)
+{
+    // this attribute is really misnamed - it wants to know if
+    // https:// is being used. SSL might be used to cover http://
+    // in some circumstances (proxies, http/2, etc..)
+    return mURI->SchemeIs("https", aIsSSL);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetProxyMethodIsConnect(bool *aProxyMethodIsConnect)
+{
+    *aProxyMethodIsConnect = mConnectionInfo->UsingConnect();
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetServerResponseHeader(nsACString &value)
+{
+    if (!mResponseHead)
+        return NS_ERROR_NOT_AVAILABLE;
+    return mResponseHead->GetHeader(nsHttp::Server, value);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetProxyChallenges(nsACString &value)
+{
+    if (!mResponseHead)
+        return NS_ERROR_UNEXPECTED;
+    return mResponseHead->GetHeader(nsHttp::Proxy_Authenticate, value);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetWWWChallenges(nsACString &value)
+{
+    if (!mResponseHead)
+        return NS_ERROR_UNEXPECTED;
+    return mResponseHead->GetHeader(nsHttp::WWW_Authenticate, value);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetProxyCredentials(const nsACString &value)
+{
+    return mRequestHead.SetHeader(nsHttp::Proxy_Authorization, value);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetWWWCredentials(const nsACString &value)
+{
+    return mRequestHead.SetHeader(nsHttp::Authorization, value);
+}
+
+//-----------------------------------------------------------------------------
+// Methods that nsIHttpAuthenticableChannel dupes from other IDLs, which we
+// get from HttpBaseChannel, must be explicitly forwarded, because C++ sucks.
+//
+
+NS_IMETHODIMP
+nsHttpChannel::GetLoadFlags(nsLoadFlags *aLoadFlags)
+{
+    return HttpBaseChannel::GetLoadFlags(aLoadFlags);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetURI(nsIURI **aURI)
+{
+    return HttpBaseChannel::GetURI(aURI);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetNotificationCallbacks(nsIInterfaceRequestor **aCallbacks)
+{
+    return HttpBaseChannel::GetNotificationCallbacks(aCallbacks);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetLoadGroup(nsILoadGroup **aLoadGroup)
+{
+    return HttpBaseChannel::GetLoadGroup(aLoadGroup);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetRequestMethod(nsACString& aMethod)
+{
+    return HttpBaseChannel::GetRequestMethod(aMethod);
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIRequestObserver
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::OnStartRequest(nsIRequest *request, nsISupports *ctxt)
+{
+    nsresult rv;
+
+    PROFILER_LABEL("nsHttpChannel", "OnStartRequest",
+        js::ProfileEntry::Category::NETWORK);
+
+    if (!(mCanceled || NS_FAILED(mStatus))) {
+        // capture the request's status, so our consumers will know ASAP of any
+        // connection failures, etc - bug 93581
+        request->GetStatus(&mStatus);
+    }
+
+    LOG(("nsHttpChannel::OnStartRequest [this=%p request=%p status=%x]\n",
+        this, request, mStatus));
+
+    // Make sure things are what we expect them to be...
+    MOZ_ASSERT(request == mCachePump || request == mTransactionPump,
+               "Unexpected request");
+    MOZ_ASSERT(!(mTransactionPump && mCachePump) || mCachedContentIsPartial,
+               "If we have both pumps, the cache content must be partial");
+
+    mAfterOnStartRequestBegun = true;
+    mOnStartRequestTimestamp = TimeStamp::Now();
+
+    if (!mSecurityInfo && !mCachePump && mTransaction) {
+        // grab the security info from the connection object; the transaction
+        // is guaranteed to own a reference to the connection.
+        mSecurityInfo = mTransaction->SecurityInfo();
+    }
+
+    // don't enter this block if we're reading from the cache...
+    if (NS_SUCCEEDED(mStatus) && !mCachePump && mTransaction) {
+        // mTransactionPump doesn't hit OnInputStreamReady and call this until
+        // all of the response headers have been acquired, so we can take ownership
+        // of them from the transaction.
+        mResponseHead = mTransaction->TakeResponseHead();
+        // the response head may be null if the transaction was cancelled.  in
+        // which case we just need to call OnStartRequest/OnStopRequest.
+        if (mResponseHead)
+            return ProcessResponse();
+
+        NS_WARNING("No response head in OnStartRequest");
+    }
+
+    // cache file could be deleted on our behalf, it could contain errors or
+    // it failed to allocate memory, reload from network here.
+    if (mCacheEntry && mCachePump && RECOVER_FROM_CACHE_FILE_ERROR(mStatus)) {
+        LOG(("  cache file error, reloading from server"));
+        mCacheEntry->AsyncDoom(nullptr);
+        rv = StartRedirectChannelToURI(mURI, nsIChannelEventSink::REDIRECT_INTERNAL);
+        if (NS_SUCCEEDED(rv))
+            return NS_OK;
+    }
+
+    // avoid crashing if mListener happens to be null...
+    if (!mListener) {
+        NS_NOTREACHED("mListener is null");
+        return NS_OK;
+    }
+
+    // before we start any content load, check for redirectTo being called
+    // this code is executed mainly before we start load from the cache
+    if (mAPIRedirectToURI && !mCanceled) {
+        nsAutoCString redirectToSpec;
+        mAPIRedirectToURI->GetAsciiSpec(redirectToSpec);
+        LOG(("  redirectTo called with uri=%s", redirectToSpec.BeginReading()));
+
+        MOZ_ASSERT(!mOnStartRequestCalled);
+
+        nsCOMPtr<nsIURI> redirectTo;
+        mAPIRedirectToURI.swap(redirectTo);
+
+        PushRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest1);
+        rv = StartRedirectChannelToURI(redirectTo, nsIChannelEventSink::REDIRECT_TEMPORARY);
+        if (NS_SUCCEEDED(rv)) {
+            return NS_OK;
+        }
+        PopRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest1);
+    }
+
+    // Hack: ContinueOnStartRequest1 uses NS_OK to detect successful redirects,
+    // so we distinguish this codepath (a non-redirect that's processing
+    // normally) by passing in a bogus error code.
+    return ContinueOnStartRequest1(NS_BINDING_FAILED);
+}
+
+nsresult
+nsHttpChannel::ContinueOnStartRequest1(nsresult result)
+{
+    if (NS_SUCCEEDED(result)) {
+        // Redirect has passed through, we don't want to go on with this
+        // channel.  It will now be canceled by the redirect handling code
+        // that called this function.
+        return NS_OK;
+    }
+
+    // on proxy errors, try to failover
+    if (mConnectionInfo->ProxyInfo() &&
+       (mStatus == NS_ERROR_PROXY_CONNECTION_REFUSED ||
+        mStatus == NS_ERROR_UNKNOWN_PROXY_HOST ||
+        mStatus == NS_ERROR_NET_TIMEOUT)) {
+
+        PushRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest2);
+        if (NS_SUCCEEDED(ProxyFailover()))
+            return NS_OK;
+        PopRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest2);
+    }
+
+    // Hack: ContinueOnStartRequest2 uses NS_OK to detect successful redirects,
+    // so we distinguish this codepath (a non-redirect that's processing
+    // normally) by passing in a bogus error code.
+    return ContinueOnStartRequest2(NS_BINDING_FAILED);
+}
+
+nsresult
+nsHttpChannel::ContinueOnStartRequest2(nsresult result)
+{
+    if (NS_SUCCEEDED(result)) {
+        // Redirect has passed through, we don't want to go on with this
+        // channel.  It will now be canceled by the redirect handling code
+        // that called this function.
+        return NS_OK;
+    }
+
+    // on other request errors, try to fall back
+    if (NS_FAILED(mStatus)) {
+        PushRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest3);
+        bool waitingForRedirectCallback;
+        ProcessFallback(&waitingForRedirectCallback);
+        if (waitingForRedirectCallback)
+            return NS_OK;
+        PopRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest3);
+    }
+
+    return ContinueOnStartRequest3(NS_OK);
+}
+
+nsresult
+nsHttpChannel::ContinueOnStartRequest3(nsresult result)
+{
+    if (mFallingBack)
+        return NS_OK;
+
+    return CallOnStartRequest();
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnStopRequest(nsIRequest *request, nsISupports *ctxt, nsresult status)
+{
+    PROFILER_LABEL("nsHttpChannel", "OnStopRequest",
+        js::ProfileEntry::Category::NETWORK);
+
+    LOG(("nsHttpChannel::OnStopRequest [this=%p request=%p status=%x]\n",
+        this, request, status));
+
+    MOZ_ASSERT(NS_IsMainThread(),
+               "OnStopRequest should only be called from the main thread");
+
+    if (NS_FAILED(status)) {
+        ProcessSecurityReport(status);
+    }
+
+    // If this load failed because of a security error, it may be because we
+    // are in a captive portal - trigger an async check to make sure.
+    int32_t nsprError = -1 * NS_ERROR_GET_CODE(status);
+    if (mozilla::psm::IsNSSErrorCode(nsprError)) {
+        gIOService->RecheckCaptivePortal();
+    }
+
+    if (mTimingEnabled && request == mCachePump) {
+        mCacheReadEnd = TimeStamp::Now();
+
+        ReportNetVSCacheTelemetry();
+    }
+
+    // allow content to be cached if it was loaded successfully (bug #482935)
+    bool contentComplete = NS_SUCCEEDED(status);
+
+    // honor the cancelation status even if the underlying transaction completed.
+    if (mCanceled || NS_FAILED(mStatus))
+        status = mStatus;
+
+    if (mCachedContentIsPartial) {
+        if (NS_SUCCEEDED(status)) {
+            // mTransactionPump should be suspended
+            MOZ_ASSERT(request != mTransactionPump,
+                       "byte-range transaction finished prematurely");
+
+            if (request == mCachePump) {
+                bool streamDone;
+                status = OnDoneReadingPartialCacheEntry(&streamDone);
+                if (NS_SUCCEEDED(status) && !streamDone)
+                    return status;
+                // otherwise, fall through and fire OnStopRequest...
+            }
+            else if (request == mTransactionPump) {
+                MOZ_ASSERT(mConcurrentCacheAccess);
+            }
+            else
+                NS_NOTREACHED("unexpected request");
+        }
+        // Do not to leave the transaction in a suspended state in error cases.
+        if (NS_FAILED(status) && mTransaction)
+            gHttpHandler->CancelTransaction(mTransaction, status);
+    }
+
+    nsCOMPtr<nsICompressConvStats> conv = do_QueryInterface(mCompressListener);
+    if (conv) {
+        conv->GetDecodedDataLength(&mDecodedBodySize);
+    }
+
+    if (mTransaction) {
+        // determine if we should call DoAuthRetry
+        bool authRetry = mAuthRetryPending && NS_SUCCEEDED(status);
+        mStronglyFramed = mTransaction->ResponseIsComplete();
+        LOG(("nsHttpChannel %p has a strongly framed transaction: %d",
+             this, mStronglyFramed));
+
+        //
+        // grab references to connection in case we need to retry an
+        // authentication request over it or use it for an upgrade
+        // to another protocol.
+        //
+        // this code relies on the code in nsHttpTransaction::Close, which
+        // tests for NS_HTTP_STICKY_CONNECTION to determine whether or not to
+        // keep the connection around after the transaction is finished.
+        //
+        RefPtr<nsAHttpConnection> conn;
+        LOG(("  authRetry=%d, sticky conn cap=%d", authRetry, mCaps & NS_HTTP_STICKY_CONNECTION));
+        // We must check caps for stickinness also on the transaction because it
+        // might have been updated by the transaction itself during inspection of
+        // the reposnse headers yet on the socket thread (found connection based
+        // auth schema).
+        if (authRetry && (mCaps & NS_HTTP_STICKY_CONNECTION ||
+                          mTransaction->Caps() & NS_HTTP_STICKY_CONNECTION)) {
+            conn = mTransaction->GetConnectionReference();
+            LOG(("  transaction %p provides connection %p", mTransaction.get(), conn.get()));
+            // This is so far a workaround to fix leak when reusing unpersistent
+            // connection for authentication retry. See bug 459620 comment 4
+            // for details.
+            if (conn && !conn->IsPersistent()) {
+                LOG(("  connection is not persistent, not reusing it"));
+                conn = nullptr;
+            }
+            // We do not use a sticky connection in case of a nsHttpPipeline as
+            // well (see bug 1337826). This is a quick fix, because
+            // nsHttpPipeline is turned off by default.
+            RefPtr<nsAHttpTransaction> tranConn = do_QueryObject(conn);
+            if (tranConn && tranConn->QueryPipeline()) {
+                LOG(("Do not use this connection, it is a nsHttpPipeline."));
+                conn = nullptr;
+            }
+        }
+
+        RefPtr<nsAHttpConnection> stickyConn;
+        if (mCaps & NS_HTTP_STICKY_CONNECTION) {
+            stickyConn = mTransaction->GetConnectionReference();
+        }
+
+        mTransferSize = mTransaction->GetTransferSize();
+
+        // If we are using the transaction to serve content, we also save the
+        // time since async open in the cache entry so we can compare telemetry
+        // between cache and net response.
+        if (request == mTransactionPump && mCacheEntry &&
+            !mAsyncOpenTime.IsNull() && !mOnStartRequestTimestamp.IsNull()) {
+            nsAutoCString onStartTime;
+            onStartTime.AppendInt( (uint64_t) (mOnStartRequestTimestamp - mAsyncOpenTime).ToMilliseconds());
+            mCacheEntry->SetMetaDataElement("net-response-time-onstart", onStartTime.get());
+
+            nsAutoCString responseTime;
+            responseTime.AppendInt( (uint64_t) (TimeStamp::Now() - mAsyncOpenTime).ToMilliseconds());
+            mCacheEntry->SetMetaDataElement("net-response-time-onstop", responseTime.get());
+        }
+
+        // at this point, we're done with the transaction
+        mTransactionTimings = mTransaction->Timings();
+        mTransaction = nullptr;
+        mTransactionPump = nullptr;
+
+        // We no longer need the dns prefetch object
+        if (mDNSPrefetch && mDNSPrefetch->TimingsValid()
+            && !mTransactionTimings.requestStart.IsNull()
+            && !mTransactionTimings.connectStart.IsNull()
+            && mDNSPrefetch->EndTimestamp() <= mTransactionTimings.connectStart) {
+            // We only need the domainLookup timestamps when not using a
+            // persistent connection, meaning if the endTimestamp < connectStart
+            mTransactionTimings.domainLookupStart =
+                mDNSPrefetch->StartTimestamp();
+            mTransactionTimings.domainLookupEnd =
+                mDNSPrefetch->EndTimestamp();
+        }
+        mDNSPrefetch = nullptr;
+
+        // handle auth retry...
+        if (authRetry) {
+            mAuthRetryPending = false;
+            status = DoAuthRetry(conn);
+            if (NS_SUCCEEDED(status))
+                return NS_OK;
+        }
+
+        // If DoAuthRetry failed, or if we have been cancelled since showing
+        // the auth. dialog, then we need to send OnStartRequest now
+        if (authRetry || (mAuthRetryPending && NS_FAILED(status))) {
+            MOZ_ASSERT(NS_FAILED(status), "should have a failure code here");
+            // NOTE: since we have a failure status, we can ignore the return
+            // value from onStartRequest.
+            if (mListener) {
+                MOZ_ASSERT(!mOnStartRequestCalled,
+                           "We should not call OnStartRequest twice.");
+                mListener->OnStartRequest(this, mListenerContext);
+                mOnStartRequestCalled = true;
+            } else {
+                NS_WARNING("OnStartRequest skipped because of null listener");
+            }
+        }
+
+        // if this transaction has been replaced, then bail.
+        if (mTransactionReplaced)
+            return NS_OK;
+
+        if (mUpgradeProtocolCallback && stickyConn &&
+            mResponseHead && mResponseHead->Status() == 101) {
+            gHttpHandler->ConnMgr()->CompleteUpgrade(stickyConn,
+                                                     mUpgradeProtocolCallback);
+        }
+    }
+
+    // HTTP_CHANNEL_DISPOSITION TELEMETRY
+    enum ChannelDisposition
+    {
+        kHttpCanceled = 0,
+        kHttpDisk = 1,
+        kHttpNetOK = 2,
+        kHttpNetEarlyFail = 3,
+        kHttpNetLateFail = 4,
+        kHttpsCanceled = 8,
+        kHttpsDisk = 9,
+        kHttpsNetOK = 10,
+        kHttpsNetEarlyFail = 11,
+        kHttpsNetLateFail = 12
+    } chanDisposition = kHttpCanceled;
+
+    // HTTP 0.9 is more likely to be an error than really 0.9, so count it that way
+    if (mCanceled) {
+        chanDisposition  = kHttpCanceled;
+    } else if (!mUsedNetwork) {
+        chanDisposition = kHttpDisk;
+    } else if (NS_SUCCEEDED(status) &&
+               mResponseHead &&
+               mResponseHead->Version() != NS_HTTP_VERSION_0_9) {
+        chanDisposition = kHttpNetOK;
+    } else if (!mTransferSize) {
+        chanDisposition = kHttpNetEarlyFail;
+    } else {
+        chanDisposition = kHttpNetLateFail;
+    }
+    if (IsHTTPS()) {
+        // shift http to https disposition enums
+        chanDisposition = static_cast<ChannelDisposition>(chanDisposition + kHttpsCanceled);
+    }
+    LOG(("  nsHttpChannel::OnStopRequest ChannelDisposition %d\n", chanDisposition));
+    Telemetry::Accumulate(Telemetry::HTTP_CHANNEL_DISPOSITION, chanDisposition);
+
+    // if needed, check cache entry has all data we expect
+    if (mCacheEntry && mCachePump &&
+        mConcurrentCacheAccess && contentComplete) {
+        int64_t size, contentLength;
+        nsresult rv = CheckPartial(mCacheEntry, &size, &contentLength);
+        if (NS_SUCCEEDED(rv)) {
+            if (size == int64_t(-1)) {
+                // mayhemer TODO - we have to restart read from cache here at the size offset
+                MOZ_ASSERT(false);
+                LOG(("  cache entry write is still in progress, but we just "
+                     "finished reading the cache entry"));
+            }
+            else if (contentLength != int64_t(-1) && contentLength != size) {
+                LOG(("  concurrent cache entry write has been interrupted"));
+                mCachedResponseHead = Move(mResponseHead);
+                // Ignore zero partial length because we also want to resume when
+                // no data at all has been read from the cache.
+                rv = MaybeSetupByteRangeRequest(size, contentLength, true);
+                if (NS_SUCCEEDED(rv) && mIsPartialRequest) {
+                    // Prevent read from cache again
+                    mCachedContentIsValid = 0;
+                    mCachedContentIsPartial = 1;
+
+                    // Perform the range request
+                    rv = ContinueConnect();
+                    if (NS_SUCCEEDED(rv)) {
+                        LOG(("  performing range request"));
+                        mCachePump = nullptr;
+                        return NS_OK;
+                    } else {
+                        LOG(("  but range request perform failed 0x%08x", rv));
+                        status = NS_ERROR_NET_INTERRUPT;
+                    }
+                }
+                else {
+                    LOG(("  but range request setup failed rv=0x%08x, failing load", rv));
+                }
+            }
+        }
+    }
+
+    mIsPending = false;
+    mStatus = status;
+
+    // perform any final cache operations before we close the cache entry.
+    if (mCacheEntry && mRequestTimeInitialized) {
+        bool writeAccess;
+        // New implementation just returns value of the !mCacheEntryIsReadOnly flag passed in.
+        // Old implementation checks on nsICache::ACCESS_WRITE flag.
+        mCacheEntry->HasWriteAccess(!mCacheEntryIsReadOnly, &writeAccess);
+        if (writeAccess) {
+            FinalizeCacheEntry();
+        }
+    }
+
+    // Register entry to the Performance resource timing
+    mozilla::dom::Performance* documentPerformance = GetPerformance();
+    if (documentPerformance) {
+        documentPerformance->AddEntry(this, this);
+    }
+
+    if (mListener) {
+        LOG(("  calling OnStopRequest\n"));
+        MOZ_ASSERT(!mOnStopRequestCalled,
+                   "We should not call OnStopRequest twice");
+        mListener->OnStopRequest(this, mListenerContext, status);
+        mOnStopRequestCalled = true;
+    }
+
+    // If a preferred alt-data type was set, this signals the consumer is
+    // interested in reading and/or writing the alt-data representation.
+    // We need to hold a reference to the cache entry in case the listener calls
+    // openAlternativeOutputStream() after CloseCacheEntry() clears mCacheEntry.
+    if (!mPreferredCachedAltDataType.IsEmpty()) {
+        mAltDataCacheEntry = mCacheEntry;
+    }
+
+    CloseCacheEntry(!contentComplete);
+
+    if (mOfflineCacheEntry)
+        CloseOfflineCacheEntry();
+
+    if (mLoadGroup)
+        mLoadGroup->RemoveRequest(this, nullptr, status);
+
+    // We don't need this info anymore
+    CleanRedirectCacheChainIfNecessary();
+
+    ReleaseListeners();
+
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIStreamListener
+//-----------------------------------------------------------------------------
+
+class OnTransportStatusAsyncEvent : public Runnable
+{
+public:
+    OnTransportStatusAsyncEvent(nsITransportEventSink* aEventSink,
+                                nsresult aTransportStatus,
+                                int64_t aProgress,
+                                int64_t aProgressMax)
+    : mEventSink(aEventSink)
+    , mTransportStatus(aTransportStatus)
+    , mProgress(aProgress)
+    , mProgressMax(aProgressMax)
+    {
+        MOZ_ASSERT(!NS_IsMainThread(), "Shouldn't be created on main thread");
+    }
+
+    NS_IMETHOD Run() override
+    {
+        MOZ_ASSERT(NS_IsMainThread(), "Should run on main thread");
+        if (mEventSink) {
+            mEventSink->OnTransportStatus(nullptr, mTransportStatus,
+                                          mProgress, mProgressMax);
+        }
+        return NS_OK;
+    }
+private:
+    nsCOMPtr<nsITransportEventSink> mEventSink;
+    nsresult mTransportStatus;
+    int64_t mProgress;
+    int64_t mProgressMax;
+};
+
+NS_IMETHODIMP
+nsHttpChannel::OnDataAvailable(nsIRequest *request, nsISupports *ctxt,
+                               nsIInputStream *input,
+                               uint64_t offset, uint32_t count)
+{
+    PROFILER_LABEL("nsHttpChannel", "OnDataAvailable",
+        js::ProfileEntry::Category::NETWORK);
+
+    LOG(("nsHttpChannel::OnDataAvailable [this=%p request=%p offset=%llu count=%u]\n",
+        this, request, offset, count));
+
+    // don't send out OnDataAvailable notifications if we've been canceled.
+    if (mCanceled)
+        return mStatus;
+
+    MOZ_ASSERT(mResponseHead, "No response head in ODA!!");
+
+    MOZ_ASSERT(!(mCachedContentIsPartial && (request == mTransactionPump)),
+               "transaction pump not suspended");
+
+    if (mAuthRetryPending || (request == mTransactionPump && mTransactionReplaced)) {
+        uint32_t n;
+        return input->ReadSegments(NS_DiscardSegment, nullptr, count, &n);
+    }
+
+    if (mListener) {
+        //
+        // synthesize transport progress event.  we do this here since we want
+        // to delay OnProgress events until we start streaming data.  this is
+        // crucially important since it impacts the lock icon (see bug 240053).
+        //
+        nsresult transportStatus;
+        if (request == mCachePump)
+            transportStatus = NS_NET_STATUS_READING;
+        else
+            transportStatus = NS_NET_STATUS_RECEIVING_FROM;
+
+        // mResponseHead may reference new or cached headers, but either way it
+        // holds our best estimate of the total content length.  Even in the case
+        // of a byte range request, the content length stored in the cached
+        // response headers is what we want to use here.
+
+        int64_t progressMax(mResponseHead->ContentLength());
+        int64_t progress = mLogicalOffset + count;
+
+        if ((progress > progressMax) && (progressMax != -1)) {
+            NS_WARNING("unexpected progress values - "
+                       "is server exceeding content length?");
+        }
+
+        // make sure params are in range for js
+        if (!InScriptableRange(progressMax)) {
+            progressMax = -1;
+        }
+
+        if (!InScriptableRange(progress)) {
+            progress = -1;
+        }
+
+        if (NS_IsMainThread()) {
+            OnTransportStatus(nullptr, transportStatus, progress, progressMax);
+        } else {
+            nsresult rv = NS_DispatchToMainThread(
+                new OnTransportStatusAsyncEvent(this, transportStatus,
+                                                progress, progressMax));
+            NS_ENSURE_SUCCESS(rv, rv);
+        }
+
+        //
+        // we have to manually keep the logical offset of the stream up-to-date.
+        // we cannot depend solely on the offset provided, since we may have
+        // already streamed some data from another source (see, for example,
+        // OnDoneReadingPartialCacheEntry).
+        //
+        int64_t offsetBefore = 0;
+        nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(input);
+        if (seekable && NS_FAILED(seekable->Tell(&offsetBefore))) {
+            seekable = nullptr;
+        }
+
+        nsresult rv =  mListener->OnDataAvailable(this,
+                                                  mListenerContext,
+                                                  input,
+                                                  mLogicalOffset,
+                                                  count);
+        if (NS_SUCCEEDED(rv)) {
+            // by contract mListener must read all of "count" bytes, but
+            // nsInputStreamPump is tolerant to seekable streams that violate that
+            // and it will redeliver incompletely read data. So we need to do
+            // the same thing when updating the progress counter to stay in sync.
+            int64_t offsetAfter, delta;
+            if (seekable && NS_SUCCEEDED(seekable->Tell(&offsetAfter))) {
+                delta = offsetAfter - offsetBefore;
+                if (delta != count) {
+                    count = delta;
+
+                    NS_WARNING("Listener OnDataAvailable contract violation");
+                    nsCOMPtr<nsIConsoleService> consoleService =
+                        do_GetService(NS_CONSOLESERVICE_CONTRACTID);
+                    nsAutoString message
+                        (NS_LITERAL_STRING(
+                        "http channel Listener OnDataAvailable contract violation"));
+                    if (consoleService) {
+                        consoleService->LogStringMessage(message.get());
+                    }
+                }
+            }
+            mLogicalOffset += count;
+        }
+
+        return rv;
+    }
+
+    return NS_ERROR_ABORT;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIThreadRetargetableRequest
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::RetargetDeliveryTo(nsIEventTarget* aNewTarget)
+{
+    MOZ_ASSERT(NS_IsMainThread(), "Should be called on main thread only");
+
+    NS_ENSURE_ARG(aNewTarget);
+    if (aNewTarget == NS_GetCurrentThread()) {
+        NS_WARNING("Retargeting delivery to same thread");
+        return NS_OK;
+    }
+    if (!mTransactionPump && !mCachePump) {
+        LOG(("nsHttpChannel::RetargetDeliveryTo %p %p no pump available\n",
+             this, aNewTarget));
+        return NS_ERROR_NOT_AVAILABLE;
+    }
+
+    nsresult rv = NS_OK;
+    // If both cache pump and transaction pump exist, we're probably dealing
+    // with partially cached content. So, we must be able to retarget both.
+    nsCOMPtr<nsIThreadRetargetableRequest> retargetableCachePump;
+    nsCOMPtr<nsIThreadRetargetableRequest> retargetableTransactionPump;
+    if (mCachePump) {
+        retargetableCachePump = do_QueryObject(mCachePump);
+        // nsInputStreamPump should implement this interface.
+        MOZ_ASSERT(retargetableCachePump);
+        rv = retargetableCachePump->RetargetDeliveryTo(aNewTarget);
+    }
+    if (NS_SUCCEEDED(rv) && mTransactionPump) {
+        retargetableTransactionPump = do_QueryObject(mTransactionPump);
+        // nsInputStreamPump should implement this interface.
+        MOZ_ASSERT(retargetableTransactionPump);
+        rv = retargetableTransactionPump->RetargetDeliveryTo(aNewTarget);
+
+        // If retarget fails for transaction pump, we must restore mCachePump.
+        if (NS_FAILED(rv) && retargetableCachePump) {
+            nsCOMPtr<nsIThread> mainThread;
+            rv = NS_GetMainThread(getter_AddRefs(mainThread));
+            NS_ENSURE_SUCCESS(rv, rv);
+            rv = retargetableCachePump->RetargetDeliveryTo(mainThread);
+        }
+    }
+    return rv;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsThreadRetargetableStreamListener
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::CheckListenerChain()
+{
+    NS_ASSERTION(NS_IsMainThread(), "Should be on main thread!");
+    nsresult rv = NS_OK;
+    nsCOMPtr<nsIThreadRetargetableStreamListener> retargetableListener =
+        do_QueryInterface(mListener, &rv);
+    if (retargetableListener) {
+        rv = retargetableListener->CheckListenerChain();
+    }
+    return rv;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsITransportEventSink
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::OnTransportStatus(nsITransport *trans, nsresult status,
+                                 int64_t progress, int64_t progressMax)
+{
+    MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread only");
+    // cache the progress sink so we don't have to query for it each time.
+    if (!mProgressSink)
+        GetCallback(mProgressSink);
+
+    if (status == NS_NET_STATUS_CONNECTED_TO ||
+        status == NS_NET_STATUS_WAITING_FOR) {
+        if (mTransaction) {
+            mTransaction->GetNetworkAddresses(mSelfAddr, mPeerAddr);
+        } else {
+            nsCOMPtr<nsISocketTransport> socketTransport =
+                do_QueryInterface(trans);
+            if (socketTransport) {
+                socketTransport->GetSelfAddr(&mSelfAddr);
+                socketTransport->GetPeerAddr(&mPeerAddr);
+            }
+        }
+    }
+
+    // block socket status event after Cancel or OnStopRequest has been called.
+    if (mProgressSink && NS_SUCCEEDED(mStatus) && mIsPending) {
+        LOG(("sending progress%s notification [this=%p status=%x"
+             " progress=%lld/%lld]\n",
+            (mLoadFlags & LOAD_BACKGROUND)? "" : " and status",
+            this, status, progress, progressMax));
+
+        if (!(mLoadFlags & LOAD_BACKGROUND)) {
+            nsAutoCString host;
+            mURI->GetHost(host);
+            mProgressSink->OnStatus(this, nullptr, status,
+                                    NS_ConvertUTF8toUTF16(host).get());
+        }
+
+        if (progress > 0) {
+            if ((progress > progressMax) && (progressMax != -1)) {
+                NS_WARNING("unexpected progress values");
+            }
+
+            // Try to get mProgressSink if it was nulled out during OnStatus.
+            if (!mProgressSink) {
+                GetCallback(mProgressSink);
+            }
+            if (mProgressSink) {
+                mProgressSink->OnProgress(this, nullptr, progress, progressMax);
+            }
+        }
+    }
+
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsICacheInfoChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::IsFromCache(bool *value)
+{
+    if (!mIsPending)
+        return NS_ERROR_NOT_AVAILABLE;
+
+    // return false if reading a partial cache entry; the data isn't entirely
+    // from the cache!
+
+    *value = (mCachePump || (mLoadFlags & LOAD_ONLY_IF_MODIFIED)) &&
+              mCachedContentIsValid && !mCachedContentIsPartial;
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheTokenExpirationTime(uint32_t *_retval)
+{
+    NS_ENSURE_ARG_POINTER(_retval);
+    if (!mCacheEntry)
+        return NS_ERROR_NOT_AVAILABLE;
+
+    return mCacheEntry->GetExpirationTime(_retval);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheTokenCachedCharset(nsACString &_retval)
+{
+    nsresult rv;
+
+    if (!mCacheEntry)
+        return NS_ERROR_NOT_AVAILABLE;
+
+    nsXPIDLCString cachedCharset;
+    rv = mCacheEntry->GetMetaDataElement("charset",
+                                         getter_Copies(cachedCharset));
+    if (NS_SUCCEEDED(rv))
+        _retval = cachedCharset;
+
+    return rv;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetCacheTokenCachedCharset(const nsACString &aCharset)
+{
+    if (!mCacheEntry)
+        return NS_ERROR_NOT_AVAILABLE;
+
+    return mCacheEntry->SetMetaDataElement("charset",
+                                           PromiseFlatCString(aCharset).get());
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetAllowStaleCacheContent(bool aAllowStaleCacheContent)
+{
+    LOG(("nsHttpChannel::SetAllowStaleCacheContent [this=%p, allow=%d]",
+         this, aAllowStaleCacheContent));
+    mAllowStaleCacheContent = aAllowStaleCacheContent;
+    return NS_OK;
+}
+NS_IMETHODIMP
+nsHttpChannel::GetAllowStaleCacheContent(bool *aAllowStaleCacheContent)
+{
+    NS_ENSURE_ARG(aAllowStaleCacheContent);
+    *aAllowStaleCacheContent = mAllowStaleCacheContent;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::PreferAlternativeDataType(const nsACString & aType)
+{
+    ENSURE_CALLED_BEFORE_ASYNC_OPEN();
+    mPreferredCachedAltDataType = aType;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetAlternativeDataType(nsACString & aType)
+{
+    // must be called during or after OnStartRequest
+    if (!mAfterOnStartRequestBegun) {
+        return NS_ERROR_NOT_AVAILABLE;
+    }
+    aType = mAvailableCachedAltDataType;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OpenAlternativeOutputStream(const nsACString & type, nsIOutputStream * *_retval)
+{
+    // OnStopRequest will clear mCacheEntry, but we may use mAltDataCacheEntry
+    // if the consumer called PreferAlternativeDataType()
+    nsCOMPtr<nsICacheEntry> cacheEntry = mCacheEntry ? mCacheEntry : mAltDataCacheEntry;
+    if (!cacheEntry) {
+        return NS_ERROR_NOT_AVAILABLE;
+    }
+    return cacheEntry->OpenAlternativeOutputStream(type, _retval);
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsICachingChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheToken(nsISupports **token)
+{
+    NS_ENSURE_ARG_POINTER(token);
+    if (!mCacheEntry)
+        return NS_ERROR_NOT_AVAILABLE;
+    return CallQueryInterface(mCacheEntry, token);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetCacheToken(nsISupports *token)
+{
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetOfflineCacheToken(nsISupports **token)
+{
+    NS_ENSURE_ARG_POINTER(token);
+    if (!mOfflineCacheEntry)
+        return NS_ERROR_NOT_AVAILABLE;
+    return CallQueryInterface(mOfflineCacheEntry, token);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetOfflineCacheToken(nsISupports *token)
+{
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheKey(nsISupports **key)
+{
+    nsresult rv;
+    NS_ENSURE_ARG_POINTER(key);
+
+    LOG(("nsHttpChannel::GetCacheKey [this=%p]\n", this));
+
+    *key = nullptr;
+
+    nsCOMPtr<nsISupportsPRUint32> container =
+        do_CreateInstance(NS_SUPPORTS_PRUINT32_CONTRACTID, &rv);
+
+    if (!container)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    rv = container->SetData(mPostID);
+    if (NS_FAILED(rv)) return rv;
+
+    return CallQueryInterface(container.get(), key);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetCacheKey(nsISupports *key)
+{
+    nsresult rv;
+
+    LOG(("nsHttpChannel::SetCacheKey [this=%p key=%p]\n", this, key));
+
+    ENSURE_CALLED_BEFORE_CONNECT();
+
+    if (!key)
+        mPostID = 0;
+    else {
+        // extract the post id
+        nsCOMPtr<nsISupportsPRUint32> container = do_QueryInterface(key, &rv);
+        if (NS_FAILED(rv)) return rv;
+
+        rv = container->GetData(&mPostID);
+        if (NS_FAILED(rv)) return rv;
+    }
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheOnlyMetadata(bool *aOnlyMetadata)
+{
+    NS_ENSURE_ARG(aOnlyMetadata);
+    *aOnlyMetadata = mCacheOnlyMetadata;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetCacheOnlyMetadata(bool aOnlyMetadata)
+{
+    LOG(("nsHttpChannel::SetCacheOnlyMetadata [this=%p only-metadata=%d]\n",
+        this, aOnlyMetadata));
+
+    ENSURE_CALLED_BEFORE_ASYNC_OPEN();
+
+    mCacheOnlyMetadata = aOnlyMetadata;
+    if (aOnlyMetadata) {
+        mLoadFlags |= LOAD_ONLY_IF_MODIFIED;
+    }
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetPin(bool *aPin)
+{
+    NS_ENSURE_ARG(aPin);
+    *aPin = mPinCacheContent;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetPin(bool aPin)
+{
+    LOG(("nsHttpChannel::SetPin [this=%p pin=%d]\n",
+        this, aPin));
+
+    ENSURE_CALLED_BEFORE_CONNECT();
+
+    mPinCacheContent = aPin;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::ForceCacheEntryValidFor(uint32_t aSecondsToTheFuture)
+{
+    if (!mCacheEntry) {
+        LOG(("nsHttpChannel::ForceCacheEntryValidFor found no cache entry "
+             "for this channel [this=%p].", this));
+    } else {
+        mCacheEntry->ForceValidFor(aSecondsToTheFuture);
+
+        nsAutoCString key;
+        mCacheEntry->GetKey(key);
+
+        LOG(("nsHttpChannel::ForceCacheEntryValidFor successfully forced valid "
+             "entry with key %s for %d seconds. [this=%p]", key.get(),
+             aSecondsToTheFuture, this));
+    }
+
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIResumableChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::ResumeAt(uint64_t aStartPos,
+                        const nsACString& aEntityID)
+{
+    LOG(("nsHttpChannel::ResumeAt [this=%p startPos=%llu id='%s']\n",
+         this, aStartPos, PromiseFlatCString(aEntityID).get()));
+    mEntityID = aEntityID;
+    mStartPos = aStartPos;
+    mResuming = true;
+    return NS_OK;
+}
+
+nsresult
+nsHttpChannel::DoAuthRetry(nsAHttpConnection *conn)
+{
+    LOG(("nsHttpChannel::DoAuthRetry [this=%p]\n", this));
+
+    MOZ_ASSERT(!mTransaction, "should not have a transaction");
+    nsresult rv;
+
+    // toggle mIsPending to allow nsIObserver implementations to modify
+    // the request headers (bug 95044).
+    mIsPending = false;
+
+    // fetch cookies, and add them to the request header.
+    // the server response could have included cookies that must be sent with
+    // this authentication attempt (bug 84794).
+    // TODO: save cookies from auth response and send them here (bug 572151).
+    AddCookiesToRequest();
+
+    // notify "http-on-modify-request" observers
+    CallOnModifyRequestObservers();
+
+    mIsPending = true;
+
+    // get rid of the old response headers
+    mResponseHead = nullptr;
+
+    // rewind the upload stream
+    if (mUploadStream) {
+        nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(mUploadStream);
+        if (seekable)
+            seekable->Seek(nsISeekableStream::NS_SEEK_SET, 0);
+    }
+
+    // always set sticky connection flag
+    mCaps |= NS_HTTP_STICKY_CONNECTION;
+    // and when needed, allow restart regardless the sticky flag
+    if (mAuthConnectionRestartable) {
+        LOG(("  connection made restartable"));
+        mCaps |= NS_HTTP_CONNECTION_RESTARTABLE;
+        mAuthConnectionRestartable = false;
+    } else {
+        LOG(("  connection made non-restartable"));
+        mCaps &= ~NS_HTTP_CONNECTION_RESTARTABLE;
+    }
+
+    // and create a new one...
+    rv = SetupTransaction();
+    if (NS_FAILED(rv)) return rv;
+
+    // transfer ownership of connection to transaction
+    if (conn)
+        mTransaction->SetConnection(conn);
+
+    rv = gHttpHandler->InitiateTransaction(mTransaction, mPriority);
+    if (NS_FAILED(rv)) return rv;
+
+    rv = mTransactionPump->AsyncRead(this, nullptr);
+    if (NS_FAILED(rv)) return rv;
+
+    uint32_t suspendCount = mSuspendCount;
+    while (suspendCount--)
+        mTransactionPump->Suspend();
+
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIApplicationCacheChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetApplicationCache(nsIApplicationCache **out)
+{
+    NS_IF_ADDREF(*out = mApplicationCache);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetApplicationCache(nsIApplicationCache *appCache)
+{
+    ENSURE_CALLED_BEFORE_CONNECT();
+
+    mApplicationCache = appCache;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetApplicationCacheForWrite(nsIApplicationCache **out)
+{
+    NS_IF_ADDREF(*out = mApplicationCacheForWrite);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetApplicationCacheForWrite(nsIApplicationCache *appCache)
+{
+    ENSURE_CALLED_BEFORE_CONNECT();
+
+    mApplicationCacheForWrite = appCache;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetLoadedFromApplicationCache(bool *aLoadedFromApplicationCache)
+{
+    *aLoadedFromApplicationCache = mLoadedFromApplicationCache;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetInheritApplicationCache(bool *aInherit)
+{
+    *aInherit = mInheritApplicationCache;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetInheritApplicationCache(bool aInherit)
+{
+    ENSURE_CALLED_BEFORE_CONNECT();
+
+    mInheritApplicationCache = aInherit;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetChooseApplicationCache(bool *aChoose)
+{
+    *aChoose = mChooseApplicationCache;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetChooseApplicationCache(bool aChoose)
+{
+    ENSURE_CALLED_BEFORE_CONNECT();
+
+    mChooseApplicationCache = aChoose;
+    return NS_OK;
+}
+
+nsHttpChannel::OfflineCacheEntryAsForeignMarker*
+nsHttpChannel::GetOfflineCacheEntryAsForeignMarker()
+{
+    if (!mApplicationCache)
+        return nullptr;
+
+    return new OfflineCacheEntryAsForeignMarker(mApplicationCache, mURI);
+}
+
+nsresult
+nsHttpChannel::OfflineCacheEntryAsForeignMarker::MarkAsForeign()
+{
+    nsresult rv;
+
+    nsCOMPtr<nsIURI> noRefURI;
+    rv = mCacheURI->CloneIgnoringRef(getter_AddRefs(noRefURI));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsAutoCString spec;
+    rv = noRefURI->GetAsciiSpec(spec);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    return mApplicationCache->MarkEntry(spec,
+                                        nsIApplicationCache::ITEM_FOREIGN);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::MarkOfflineCacheEntryAsForeign()
+{
+    nsresult rv;
+
+    nsAutoPtr<OfflineCacheEntryAsForeignMarker> marker(
+        GetOfflineCacheEntryAsForeignMarker());
+
+    if (!marker)
+        return NS_ERROR_NOT_AVAILABLE;
+
+    rv = marker->MarkAsForeign();
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIAsyncVerifyRedirectCallback
+//-----------------------------------------------------------------------------
+
+nsresult
+nsHttpChannel::WaitForRedirectCallback()
+{
+    nsresult rv;
+    LOG(("nsHttpChannel::WaitForRedirectCallback [this=%p]\n", this));
+
+    if (mTransactionPump) {
+        rv = mTransactionPump->Suspend();
+        NS_ENSURE_SUCCESS(rv, rv);
+    }
+    if (mCachePump) {
+        rv = mCachePump->Suspend();
+        if (NS_FAILED(rv) && mTransactionPump) {
+#ifdef DEBUG
+            nsresult resume =
+#endif
+            mTransactionPump->Resume();
+            MOZ_ASSERT(NS_SUCCEEDED(resume),
+                       "Failed to resume transaction pump");
+        }
+        NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    mWaitingForRedirectCallback = true;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnRedirectVerifyCallback(nsresult result)
+{
+    LOG(("nsHttpChannel::OnRedirectVerifyCallback [this=%p] "
+         "result=%x stack=%d mWaitingForRedirectCallback=%u\n",
+         this, result, mRedirectFuncStack.Length(), mWaitingForRedirectCallback));
+    MOZ_ASSERT(mWaitingForRedirectCallback,
+               "Someone forgot to call WaitForRedirectCallback() ?!");
+    mWaitingForRedirectCallback = false;
+
+    if (mCanceled && NS_SUCCEEDED(result))
+        result = NS_BINDING_ABORTED;
+
+    for (uint32_t i = mRedirectFuncStack.Length(); i > 0;) {
+        --i;
+        // Pop the last function pushed to the stack
+        nsContinueRedirectionFunc func = mRedirectFuncStack[i];
+        mRedirectFuncStack.RemoveElementAt(mRedirectFuncStack.Length() - 1);
+
+        // Call it with the result we got from the callback or the deeper
+        // function call.
+        result = (this->*func)(result);
+
+        // If a new function has been pushed to the stack and placed us in the
+        // waiting state, we need to break the chain and wait for the callback
+        // again.
+        if (mWaitingForRedirectCallback)
+            break;
+    }
+
+    if (NS_FAILED(result) && !mCanceled) {
+        // First, cancel this channel if we are in failure state to set mStatus
+        // and let it be propagated to pumps.
+        Cancel(result);
+    }
+
+    if (!mWaitingForRedirectCallback) {
+        // We are not waiting for the callback. At this moment we must release
+        // reference to the redirect target channel, otherwise we may leak.
+        mRedirectChannel = nullptr;
+    }
+
+    // We always resume the pumps here. If all functions on stack have been
+    // called we need OnStopRequest to be triggered, and if we broke out of the
+    // loop above (and are thus waiting for a new callback) the suspension
+    // count must be balanced in the pumps.
+    if (mTransactionPump)
+        mTransactionPump->Resume();
+    if (mCachePump)
+        mCachePump->Resume();
+
+    return result;
+}
+
+void
+nsHttpChannel::PushRedirectAsyncFunc(nsContinueRedirectionFunc func)
+{
+    mRedirectFuncStack.AppendElement(func);
+}
+
+void
+nsHttpChannel::PopRedirectAsyncFunc(nsContinueRedirectionFunc func)
+{
+    MOZ_ASSERT(func == mRedirectFuncStack[mRedirectFuncStack.Length() - 1],
+               "Trying to pop wrong method from redirect async stack!");
+
+    mRedirectFuncStack.TruncateLength(mRedirectFuncStack.Length() - 1);
+}
+
+//-----------------------------------------------------------------------------
+// nsIDNSListener functions
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::OnLookupComplete(nsICancelable *request,
+                                nsIDNSRecord  *rec,
+                                nsresult       status)
+{
+    MOZ_ASSERT(NS_IsMainThread(), "Expecting DNS callback on main thread.");
+
+    LOG(("nsHttpChannel::OnLookupComplete [this=%p] prefetch complete%s: "
+         "%s status[0x%x]\n",
+         this, mCaps & NS_HTTP_REFRESH_DNS ? ", refresh requested" : "",
+         NS_SUCCEEDED(status) ? "success" : "failure", status));
+
+    // We no longer need the dns prefetch object. Note: mDNSPrefetch could be
+    // validly null if OnStopRequest has already been called.
+    // We only need the domainLookup timestamps when not loading from cache
+    if (mDNSPrefetch && mDNSPrefetch->TimingsValid() && mTransaction) {
+        TimeStamp connectStart = mTransaction->GetConnectStart();
+        TimeStamp requestStart = mTransaction->GetRequestStart();
+        // We only set the domainLookup timestamps if we're not using a
+        // persistent connection.
+        if (requestStart.IsNull() && connectStart.IsNull()) {
+            mTransaction->SetDomainLookupStart(mDNSPrefetch->StartTimestamp());
+            mTransaction->SetDomainLookupEnd(mDNSPrefetch->EndTimestamp());
+        }
+    }
+    mDNSPrefetch = nullptr;
+
+    // Unset DNS cache refresh if it was requested,
+    if (mCaps & NS_HTTP_REFRESH_DNS) {
+        mCaps &= ~NS_HTTP_REFRESH_DNS;
+        if (mTransaction) {
+            mTransaction->SetDNSWasRefreshed();
+        }
+    }
+
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel internal functions
+//-----------------------------------------------------------------------------
+
+// Creates an URI to the given location using current URI for base and charset
+nsresult
+nsHttpChannel::CreateNewURI(const char *loc, nsIURI **newURI)
+{
+    nsCOMPtr<nsIIOService> ioService;
+    nsresult rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
+    if (NS_FAILED(rv)) return rv;
+
+    // the new uri should inherit the origin charset of the current uri
+    nsAutoCString originCharset;
+    rv = mURI->GetOriginCharset(originCharset);
+    if (NS_FAILED(rv))
+        originCharset.Truncate();
+
+    return ioService->NewURI(nsDependentCString(loc),
+                             originCharset.get(),
+                             mURI,
+                             newURI);
+}
+
+void
+nsHttpChannel::MaybeInvalidateCacheEntryForSubsequentGet()
+{
+    // See RFC 2616 section 5.1.1. These are considered valid
+    // methods which DO NOT invalidate cache-entries for the
+    // referred resource. POST, PUT and DELETE as well as any
+    // other method not listed here will potentially invalidate
+    // any cached copy of the resource
+    if (mRequestHead.IsGet() || mRequestHead.IsOptions() ||
+        mRequestHead.IsHead() || mRequestHead.IsTrace() ||
+        mRequestHead.IsConnect()) {
+        return;
+    }
+
+    // Invalidate the request-uri.
+    if (LOG_ENABLED()) {
+      nsAutoCString key;
+      mURI->GetAsciiSpec(key);
+      LOG(("MaybeInvalidateCacheEntryForSubsequentGet [this=%p uri=%s]\n",
+          this, key.get()));
+    }
+
+    DoInvalidateCacheEntry(mURI);
+
+    // Invalidate Location-header if set
+    nsAutoCString location;
+    mResponseHead->GetHeader(nsHttp::Location, location);
+    if (!location.IsEmpty()) {
+        LOG(("  Location-header=%s\n", location.get()));
+        InvalidateCacheEntryForLocation(location.get());
+    }
+
+    // Invalidate Content-Location-header if set
+    mResponseHead->GetHeader(nsHttp::Content_Location, location);
+    if (!location.IsEmpty()) {
+        LOG(("  Content-Location-header=%s\n", location.get()));
+        InvalidateCacheEntryForLocation(location.get());
+    }
+}
+
+void
+nsHttpChannel::InvalidateCacheEntryForLocation(const char *location)
+{
+    nsAutoCString tmpCacheKey, tmpSpec;
+    nsCOMPtr<nsIURI> resultingURI;
+    nsresult rv = CreateNewURI(location, getter_AddRefs(resultingURI));
+    if (NS_SUCCEEDED(rv) && HostPartIsTheSame(resultingURI)) {
+        DoInvalidateCacheEntry(resultingURI);
+    } else {
+        LOG(("  hosts not matching\n"));
+    }
+}
+
+void
+nsHttpChannel::DoInvalidateCacheEntry(nsIURI* aURI)
+{
+    // NOTE:
+    // Following comments 24,32 and 33 in bug #327765, we only care about
+    // the cache in the protocol-handler, not the application cache.
+    // The logic below deviates from the original logic in OpenCacheEntry on
+    // one point by using only READ_ONLY access-policy. I think this is safe.
+
+    nsresult rv;
+
+    nsAutoCString key;
+    if (LOG_ENABLED()) {
+      aURI->GetAsciiSpec(key);
+    }
+
+    LOG(("DoInvalidateCacheEntry [channel=%p key=%s]", this, key.get()));
+
+    nsCOMPtr<nsICacheStorageService> cacheStorageService =
+        do_GetService("@mozilla.org/netwerk/cache-storage-service;1", &rv);
+
+    nsCOMPtr<nsICacheStorage> cacheStorage;
+    if (NS_SUCCEEDED(rv)) {
+        RefPtr<LoadContextInfo> info = GetLoadContextInfo(this);
+        rv = cacheStorageService->DiskCacheStorage(info, false, getter_AddRefs(cacheStorage));
+    }
+
+    if (NS_SUCCEEDED(rv)) {
+        rv = cacheStorage->AsyncDoomURI(aURI, EmptyCString(), nullptr);
+    }
+
+    LOG(("DoInvalidateCacheEntry [channel=%p key=%s rv=%d]", this, key.get(), int(rv)));
+}
+
+void
+nsHttpChannel::AsyncOnExamineCachedResponse()
+{
+    gHttpHandler->OnExamineCachedResponse(this);
+
+}
+
+void
+nsHttpChannel::UpdateAggregateCallbacks()
+{
+    if (!mTransaction) {
+        return;
+    }
+    nsCOMPtr<nsIInterfaceRequestor> callbacks;
+    NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
+                                           NS_GetCurrentThread(),
+                                           getter_AddRefs(callbacks));
+    mTransaction->SetSecurityCallbacks(callbacks);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetLoadGroup(nsILoadGroup *aLoadGroup)
+{
+    MOZ_ASSERT(NS_IsMainThread(), "Wrong thread.");
+
+    nsresult rv = HttpBaseChannel::SetLoadGroup(aLoadGroup);
+    if (NS_SUCCEEDED(rv)) {
+        UpdateAggregateCallbacks();
+    }
+    return rv;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetNotificationCallbacks(nsIInterfaceRequestor *aCallbacks)
+{
+    MOZ_ASSERT(NS_IsMainThread(), "Wrong thread.");
+
+    nsresult rv = HttpBaseChannel::SetNotificationCallbacks(aCallbacks);
+    if (NS_SUCCEEDED(rv)) {
+        UpdateAggregateCallbacks();
+    }
+    return rv;
+}
+
+void
+nsHttpChannel::MarkIntercepted()
+{
+    mInterceptCache = INTERCEPTED;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetResponseSynthesized(bool* aSynthesized)
+{
+    NS_ENSURE_ARG_POINTER(aSynthesized);
+    *aSynthesized = (mInterceptCache == INTERCEPTED);
+    return NS_OK;
+}
+
+bool
+nsHttpChannel::AwaitingCacheCallbacks()
+{
+    return mCacheEntriesToWaitFor != 0;
+}
+
+void
+nsHttpChannel::SetPushedStream(Http2PushedStream *stream)
+{
+    MOZ_ASSERT(stream);
+    MOZ_ASSERT(!mPushedStream);
+    mPushedStream = stream;
+}
+
+nsresult
+nsHttpChannel::OnPush(const nsACString &url, Http2PushedStream *pushedStream)
+{
+    MOZ_ASSERT(NS_IsMainThread());
+    LOG(("nsHttpChannel::OnPush [this=%p]\n", this));
+
+    MOZ_ASSERT(mCaps & NS_HTTP_ONPUSH_LISTENER);
+    nsCOMPtr<nsIHttpPushListener> pushListener;
+    NS_QueryNotificationCallbacks(mCallbacks,
+                                  mLoadGroup,
+                                  NS_GET_IID(nsIHttpPushListener),
+                                  getter_AddRefs(pushListener));
+
+    MOZ_ASSERT(pushListener);
+    if (!pushListener) {
+        LOG(("nsHttpChannel::OnPush [this=%p] notification callbacks do not "
+             "implement nsIHttpPushListener\n", this));
+        return NS_ERROR_UNEXPECTED;
+    }
+
+    nsCOMPtr<nsIURI> pushResource;
+    nsresult rv;
+
+    // Create a Channel for the Push Resource
+    rv = NS_NewURI(getter_AddRefs(pushResource), url);
+    if (NS_FAILED(rv)) {
+        return NS_ERROR_FAILURE;
+    }
+
+    nsCOMPtr<nsIIOService> ioService;
+    rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIChannel> pushChannel;
+    rv = NS_NewChannelInternal(getter_AddRefs(pushChannel),
+                               pushResource,
+                               mLoadInfo,
+                               nullptr, // aLoadGroup
+                               nullptr, // aCallbacks
+                               nsIRequest::LOAD_NORMAL,
+                               ioService);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsIHttpChannel> pushHttpChannel = do_QueryInterface(pushChannel);
+    MOZ_ASSERT(pushHttpChannel);
+    if (!pushHttpChannel) {
+        return NS_ERROR_UNEXPECTED;
+    }
+
+    RefPtr<nsHttpChannel> channel;
+    CallQueryInterface(pushHttpChannel, channel.StartAssignment());
+    MOZ_ASSERT(channel);
+    if (!channel) {
+        return NS_ERROR_UNEXPECTED;
+    }
+
+    // new channel needs mrqeuesthead and headers from pushedStream
+    channel->mRequestHead.ParseHeaderSet(
+        pushedStream->GetRequestString().BeginWriting());
+
+    channel->mLoadGroup = mLoadGroup;
+    channel->mLoadInfo = mLoadInfo;
+    channel->mCallbacks = mCallbacks;
+
+    // Link the pushed stream with the new channel and call listener
+    channel->SetPushedStream(pushedStream);
+    rv = pushListener->OnPush(this, pushHttpChannel);
+    return rv;
+}
+
+// static
+bool nsHttpChannel::IsRedirectStatus(uint32_t status)
+{
+    // 305 disabled as a security measure (see bug 187996).
+    return status == 300 || status == 301 || status == 302 || status == 303 ||
+           status == 307 || status == 308;
+}
+
+void
+nsHttpChannel::SetCouldBeSynthesized()
+{
+  MOZ_ASSERT(!BypassServiceWorker());
+  mResponseCouldBeSynthesized = true;
+}
+
+void
+nsHttpChannel::SetConnectionInfo(nsHttpConnectionInfo *aCI)
+{
+    mConnectionInfo = aCI ? aCI->Clone() : nullptr;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnPreflightSucceeded()
+{
+    MOZ_ASSERT(mRequireCORSPreflight, "Why did a preflight happen?");
+    mIsCorsPreflightDone = 1;
+    mPreflightChannel = nullptr;
+
+    return ContinueConnect();
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnPreflightFailed(nsresult aError)
+{
+    MOZ_ASSERT(mRequireCORSPreflight, "Why did a preflight happen?");
+    mIsCorsPreflightDone = 1;
+    mPreflightChannel = nullptr;
+
+    CloseCacheEntry(false);
+    AsyncAbort(aError);
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsIHstsPrimingCallback functions
+//-----------------------------------------------------------------------------
+
+/*
+ * May be invoked synchronously if HSTS priming has already been performed
+ * for the host.
+ */
+nsresult
+nsHttpChannel::OnHSTSPrimingSucceeded(bool aCached)
+{
+    if (nsMixedContentBlocker::sUseHSTS) {
+        // redirect the channel to HTTPS if the pref
+        // "security.mixed_content.use_hsts" is true
+        LOG(("HSTS Priming succeeded, redirecting to HTTPS [this=%p]", this));
+        Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
+                (aCached) ? HSTSPrimingResult::eHSTS_PRIMING_CACHED_DO_UPGRADE :
+                            HSTSPrimingResult::eHSTS_PRIMING_SUCCEEDED);
+        return AsyncCall(&nsHttpChannel::HandleAsyncRedirectChannelToHttps);
+    }
+
+    // If "security.mixed_content.use_hsts" is false, record the result of
+    // HSTS priming and block or proceed with the load as required by
+    // mixed-content blocking
+    bool wouldBlock = mLoadInfo->GetMixedContentWouldBlock();
+
+    // preserve the mixed-content-before-hsts order and block if required
+    if (wouldBlock) {
+        LOG(("HSTS Priming succeeded, blocking for mixed-content [this=%p]",
+                    this));
+        Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
+                              HSTSPrimingResult::eHSTS_PRIMING_SUCCEEDED_BLOCK);
+        CloseCacheEntry(false);
+        return AsyncAbort(NS_ERROR_CONTENT_BLOCKED);
+    }
+
+    LOG(("HSTS Priming succeeded, loading insecure: [this=%p]", this));
+    Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
+                          HSTSPrimingResult::eHSTS_PRIMING_SUCCEEDED_HTTP);
+
+    nsresult rv = ContinueConnect();
+    if (NS_FAILED(rv)) {
+        CloseCacheEntry(false);
+        return AsyncAbort(rv);
+    }
+
+    return NS_OK;
+}
+
+/*
+ * May be invoked synchronously if HSTS priming has already been performed
+ * for the host.
+ */
+nsresult
+nsHttpChannel::OnHSTSPrimingFailed(nsresult aError, bool aCached)
+{
+    bool wouldBlock = mLoadInfo->GetMixedContentWouldBlock();
+
+    LOG(("HSTS Priming Failed [this=%p], %s the load", this,
+                (wouldBlock) ? "blocking" : "allowing"));
+    if (aCached) {
+        // Between the time we marked for priming and started the priming request,
+        // the host was found to not allow the upgrade, probably from another
+        // priming request.
+        Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
+                (wouldBlock) ?  HSTSPrimingResult::eHSTS_PRIMING_CACHED_BLOCK :
+                                HSTSPrimingResult::eHSTS_PRIMING_CACHED_NO_UPGRADE);
+    } else {
+        // A priming request was sent, and no HSTS header was found that allows
+        // the upgrade.
+        Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
+                (wouldBlock) ?  HSTSPrimingResult::eHSTS_PRIMING_FAILED_BLOCK :
+                                HSTSPrimingResult::eHSTS_PRIMING_FAILED_ACCEPT);
+    }
+
+    // Don't visit again for at least
+    // security.mixed_content.hsts_priming_cache_timeout seconds.
+    nsISiteSecurityService* sss = gHttpHandler->GetSSService();
+    NS_ENSURE_TRUE(sss, NS_ERROR_OUT_OF_MEMORY);
+    nsresult rv = sss->CacheNegativeHSTSResult(mURI,
+            nsMixedContentBlocker::sHSTSPrimingCacheTimeout);
+    if (NS_FAILED(rv)) {
+        NS_ERROR("nsISiteSecurityService::CacheNegativeHSTSResult failed");
+    }
+
+    // If we would block, go ahead and abort with the error provided
+    if (wouldBlock) {
+        CloseCacheEntry(false);
+        return AsyncAbort(aError);
+    }
+
+    // we can continue the load and the UI has been updated as mixed content
+    rv = ContinueConnect();
+    if (NS_FAILED(rv)) {
+        CloseCacheEntry(false);
+        return AsyncAbort(rv);
+    }
+
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// AChannelHasDivertableParentChannelAsListener internal functions
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::MessageDiversionStarted(ADivertableParentChannel *aParentChannel)
+{
+  LOG(("nsHttpChannel::MessageDiversionStarted [this=%p]", this));
+  MOZ_ASSERT(!mParentChannel);
+  mParentChannel = aParentChannel;
+  // If the channel is suspended, propagate that info to the parent's mEventQ.
+  uint32_t suspendCount = mSuspendCount;
+  while (suspendCount--) {
+    mParentChannel->SuspendMessageDiversion();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::MessageDiversionStop()
+{
+  LOG(("nsHttpChannel::MessageDiversionStop [this=%p]", this));
+  MOZ_ASSERT(mParentChannel);
+  mParentChannel = nullptr;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SuspendInternal()
+{
+    NS_ENSURE_TRUE(mIsPending, NS_ERROR_NOT_AVAILABLE);
+
+    LOG(("nsHttpChannel::SuspendInternal [this=%p]\n", this));
+
+    ++mSuspendCount;
+
+    nsresult rvTransaction = NS_OK;
+    if (mTransactionPump) {
+        rvTransaction = mTransactionPump->Suspend();
+    }
+    nsresult rvCache = NS_OK;
+    if (mCachePump) {
+        rvCache = mCachePump->Suspend();
+    }
+
+    return NS_FAILED(rvTransaction) ? rvTransaction : rvCache;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::ResumeInternal()
+{
+    NS_ENSURE_TRUE(mSuspendCount > 0, NS_ERROR_UNEXPECTED);
+
+    LOG(("nsHttpChannel::ResumeInternal [this=%p]\n", this));
+
+    if (--mSuspendCount == 0 && mCallOnResume) {
+        nsresult rv = AsyncCall(mCallOnResume);
+        mCallOnResume = nullptr;
+        NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    nsresult rvTransaction = NS_OK;
+    if (mTransactionPump) {
+        rvTransaction = mTransactionPump->Resume();
+    }
+
+    nsresult rvCache = NS_OK;
+    if (mCachePump) {
+        rvCache = mCachePump->Resume();
+    }
+
+    return NS_FAILED(rvTransaction) ? rvTransaction : rvCache;
+}
+
+void
+nsHttpChannel::MaybeWarnAboutAppCache()
+{
+    // First, accumulate a telemetry ping about appcache usage.
+    Telemetry::Accumulate(Telemetry::HTTP_OFFLINE_CACHE_DOCUMENT_LOAD,
+                          true);
+
+    // Then, issue a deprecation warning.
+    nsCOMPtr<nsIDeprecationWarner> warner;
+    GetCallback(warner);
+    if (warner) {
+        warner->IssueWarning(nsIDocument::eAppCache, false);
+    }
+}
+
+void
+nsHttpChannel::SetLoadGroupUserAgentOverride()
+{
+    nsCOMPtr<nsIURI> uri;
+    GetURI(getter_AddRefs(uri));
+    nsAutoCString uriScheme;
+    if (uri) {
+        uri->GetScheme(uriScheme);
+    }
+
+    // We don't need a UA for file: protocols.
+    if (uriScheme.EqualsLiteral("file")) {
+        gHttpHandler->OnUserAgentRequest(this);
+        return;
+    }
+
+    nsIRequestContextService* rcsvc = gHttpHandler->GetRequestContextService();
+    nsCOMPtr<nsIRequestContext> rc;
+    if (rcsvc) {
+        rcsvc->GetRequestContext(mRequestContextID,
+                                    getter_AddRefs(rc));
+    }
+
+    nsAutoCString ua;
+    if (nsContentUtils::IsNonSubresourceRequest(this)) {
+        gHttpHandler->OnUserAgentRequest(this);
+        if (rc) {
+            GetRequestHeader(NS_LITERAL_CSTRING("User-Agent"), ua);
+            rc->SetUserAgentOverride(ua);
+        }
+    } else {
+        GetRequestHeader(NS_LITERAL_CSTRING("User-Agent"), ua);
+        // Don't overwrite the UA if it is already set (eg by an XHR with explicit UA).
+        if (ua.IsEmpty()) {
+            if (rc) {
+                rc->GetUserAgentOverride(ua);
+                SetRequestHeader(NS_LITERAL_CSTRING("User-Agent"), ua, false);
+            } else {
+                gHttpHandler->OnUserAgentRequest(this);
+            }
+        }
+    }
+}
+
+void
+nsHttpChannel::SetDoNotTrack()
+{
+  /**
+   * 'DoNotTrack' header should be added if 'privacy.donottrackheader.enabled'
+   * is true or tracking protection is enabled. See bug 1258033.
+   */
+  nsCOMPtr<nsILoadContext> loadContext;
+  NS_QueryNotificationCallbacks(this, loadContext);
+
+  if ((loadContext && loadContext->UseTrackingProtection()) ||
+      nsContentUtils::DoNotTrackEnabled()) {
+    mRequestHead.SetHeader(nsHttp::DoNotTrack,
+                           NS_LITERAL_CSTRING("1"),
+                           false);
+  }
+}
+
+
+void
+nsHttpChannel::ReportNetVSCacheTelemetry()
+{
+    nsresult rv;
+    if (!mCacheEntry) {
+        return;
+    }
+
+    // We only report telemetry if the entry is persistent (on disk)
+    bool persistent;
+    rv = mCacheEntry->GetPersistent(&persistent);
+    if (NS_FAILED(rv) || !persistent) {
+        return;
+    }
+
+    nsXPIDLCString tmpStr;
+    rv = mCacheEntry->GetMetaDataElement("net-response-time-onstart",
+                                         getter_Copies(tmpStr));
+    if (NS_FAILED(rv)) {
+        return;
+    }
+    uint64_t onStartNetTime = tmpStr.ToInteger64(&rv);
+    if (NS_FAILED(rv)) {
+        return;
+    }
+
+    tmpStr.Truncate();
+    rv = mCacheEntry->GetMetaDataElement("net-response-time-onstop",
+                                         getter_Copies(tmpStr));
+    if (NS_FAILED(rv)) {
+        return;
+    }
+    uint64_t onStopNetTime = tmpStr.ToInteger64(&rv);
+    if (NS_FAILED(rv)) {
+        return;
+    }
+
+    uint64_t onStartCacheTime = (mOnStartRequestTimestamp - mAsyncOpenTime).ToMilliseconds();
+    int64_t onStartDiff = onStartNetTime - onStartCacheTime;
+    onStartDiff += 500; // We offset the difference by 500 ms to report positive values in telemetry
+
+    uint64_t onStopCacheTime = (mCacheReadEnd - mAsyncOpenTime).ToMilliseconds();
+    int64_t onStopDiff = onStopNetTime - onStopCacheTime;
+    onStopDiff += 500; // We offset the difference by 500 ms
+
+    if (mDidReval) {
+        Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_REVALIDATED, onStartDiff);
+        Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_REVALIDATED, onStopDiff);
+    } else {
+        Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_NOTREVALIDATED, onStartDiff);
+        Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_NOTREVALIDATED, onStopDiff);
+    }
+
+    if (mDidReval) {
+        // We don't report revalidated probes as the data would be skewed.
+        return;
+    }
+
+    uint32_t diskStorageSizeK = 0;
+    rv = mCacheEntry->GetDiskStorageSizeInKB(&diskStorageSizeK);
+    if (NS_FAILED(rv)) {
+        return;
+    }
+
+    nsAutoCString contentType;
+    if (mResponseHead && mResponseHead->HasContentType()) {
+        mResponseHead->ContentType(contentType);
+    }
+    bool isImage = StringBeginsWith(contentType, NS_LITERAL_CSTRING("image/"));
+    if (isImage) {
+        Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_ISIMG, onStartDiff);
+        Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_ISIMG, onStopDiff);
+    } else {
+        Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_NOTIMG, onStartDiff);
+        Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_NOTIMG, onStopDiff);
+    }
+
+    if (mCacheOpenWithPriority) {
+        if (mCacheQueueSizeWhenOpen < 5) {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_QSMALL_HIGHPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QSMALL_HIGHPRI, onStopDiff);
+        } else if (mCacheQueueSizeWhenOpen < 10) {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_QMED_HIGHPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QMED_HIGHPRI, onStopDiff);
+        } else {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_QBIG_HIGHPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QBIG_HIGHPRI, onStopDiff);
+        }
+    } else { // The limits are higher for normal priority cache queues
+        if (mCacheQueueSizeWhenOpen < 10) {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_QSMALL_NORMALPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QSMALL_NORMALPRI, onStopDiff);
+        } else if (mCacheQueueSizeWhenOpen < 50) {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_QMED_NORMALPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QMED_NORMALPRI, onStopDiff);
+        } else {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_QBIG_NORMALPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QBIG_NORMALPRI, onStopDiff);
+        }
+    }
+
+    if (diskStorageSizeK < 32) {
+        if (mCacheOpenWithPriority) {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_SMALL_HIGHPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_SMALL_HIGHPRI, onStopDiff);
+        } else {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_SMALL_NORMALPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_SMALL_NORMALPRI, onStopDiff);
+        }
+    } else if (diskStorageSizeK < 256) {
+        if (mCacheOpenWithPriority) {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_MED_HIGHPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_MED_HIGHPRI, onStopDiff);
+        } else {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_MED_NORMALPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_MED_NORMALPRI, onStopDiff);
+        }
+    } else {
+        if (mCacheOpenWithPriority) {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_LARGE_HIGHPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_LARGE_HIGHPRI, onStopDiff);
+        } else {
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_LARGE_NORMALPRI, onStartDiff);
+            Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_LARGE_NORMALPRI, onStopDiff);
+        }
+    }
+}
+
+} // namespace net
+} // namespace mozilla