summaryrefslogtreecommitdiffstats
path: root/netwerk/protocol/http/nsHttpChannel.h
blob: defd710c3ae3b9845301e13df5ef3b2c77169b67 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set et cin ts=4 sw=4 sts=4: */
/* 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/. */

#ifndef nsHttpChannel_h__
#define nsHttpChannel_h__

#include "HttpBaseChannel.h"
#include "nsTArray.h"
#include "nsICachingChannel.h"
#include "nsICacheEntry.h"
#include "nsICacheEntryOpenCallback.h"
#include "nsIDNSListener.h"
#include "nsIApplicationCacheChannel.h"
#include "nsIChannelWithDivertableParentListener.h"
#include "nsIProtocolProxyCallback.h"
#include "nsIHttpAuthenticableChannel.h"
#include "nsIAsyncVerifyRedirectCallback.h"
#include "nsIThreadRetargetableRequest.h"
#include "nsIThreadRetargetableStreamListener.h"
#include "nsWeakReference.h"
#include "TimingStruct.h"
#include "ADivertableParentChannel.h"
#include "AutoClose.h"
#include "nsIStreamListener.h"
#include "nsISupportsPrimitives.h"
#include "nsICorsPreflightCallback.h"
#include "AlternateServices.h"

class nsDNSPrefetch;
class nsICancelable;
class nsIHttpChannelAuthProvider;
class nsInputStreamPump;
class nsISSLStatus;

namespace mozilla { namespace net {

class Http2PushedStream;

class HttpChannelSecurityWarningReporter
{
public:
  virtual nsresult ReportSecurityMessage(const nsAString& aMessageTag,
                                         const nsAString& aMessageCategory) = 0;
};

//-----------------------------------------------------------------------------
// nsHttpChannel
//-----------------------------------------------------------------------------

// Use to support QI nsIChannel to nsHttpChannel
#define NS_HTTPCHANNEL_IID                         \
{                                                  \
  0x301bf95b,                                      \
  0x7bb3,                                          \
  0x4ae1,                                          \
  {0xa9, 0x71, 0x40, 0xbc, 0xfa, 0x81, 0xde, 0x12} \
}

class nsHttpChannel final : public HttpBaseChannel
                          , public HttpAsyncAborter<nsHttpChannel>
                          , public nsIStreamListener
                          , public nsICachingChannel
                          , public nsICacheEntryOpenCallback
                          , public nsITransportEventSink
                          , public nsIProtocolProxyCallback
                          , public nsIHttpAuthenticableChannel
                          , public nsIApplicationCacheChannel
                          , public nsIAsyncVerifyRedirectCallback
                          , public nsIThreadRetargetableRequest
                          , public nsIThreadRetargetableStreamListener
                          , public nsIDNSListener
                          , public nsSupportsWeakReference
                          , public nsICorsPreflightCallback
                          , public nsIChannelWithDivertableParentListener
{
public:
    NS_DECL_ISUPPORTS_INHERITED
    NS_DECL_NSIREQUESTOBSERVER
    NS_DECL_NSISTREAMLISTENER
    NS_DECL_NSITHREADRETARGETABLESTREAMLISTENER
    NS_DECL_NSICACHEINFOCHANNEL
    NS_DECL_NSICACHINGCHANNEL
    NS_DECL_NSICACHEENTRYOPENCALLBACK
    NS_DECL_NSITRANSPORTEVENTSINK
    NS_DECL_NSIPROTOCOLPROXYCALLBACK
    NS_DECL_NSIPROXIEDCHANNEL
    NS_DECL_NSIAPPLICATIONCACHECONTAINER
    NS_DECL_NSIAPPLICATIONCACHECHANNEL
    NS_DECL_NSIASYNCVERIFYREDIRECTCALLBACK
    NS_DECL_NSITHREADRETARGETABLEREQUEST
    NS_DECL_NSIDNSLISTENER
    NS_DECL_NSICHANNELWITHDIVERTABLEPARENTLISTENER
    NS_DECLARE_STATIC_IID_ACCESSOR(NS_HTTPCHANNEL_IID)

    // nsIHttpAuthenticableChannel. We can't use
    // NS_DECL_NSIHTTPAUTHENTICABLECHANNEL because it duplicates cancel() and
    // others.
    NS_IMETHOD GetIsSSL(bool *aIsSSL) override;
    NS_IMETHOD GetProxyMethodIsConnect(bool *aProxyMethodIsConnect) override;
    NS_IMETHOD GetServerResponseHeader(nsACString & aServerResponseHeader) override;
    NS_IMETHOD GetProxyChallenges(nsACString & aChallenges) override;
    NS_IMETHOD GetWWWChallenges(nsACString & aChallenges) override;
    NS_IMETHOD SetProxyCredentials(const nsACString & aCredentials) override;
    NS_IMETHOD SetWWWCredentials(const nsACString & aCredentials) override;
    NS_IMETHOD OnAuthAvailable() override;
    NS_IMETHOD OnAuthCancelled(bool userCancel) override;
    NS_IMETHOD CloseStickyConnection() override;
    NS_IMETHOD ConnectionRestartable(bool) override;
    // Functions we implement from nsIHttpAuthenticableChannel but are
    // declared in HttpBaseChannel must be implemented in this class. We
    // just call the HttpBaseChannel:: impls.
    NS_IMETHOD GetLoadFlags(nsLoadFlags *aLoadFlags) override;
    NS_IMETHOD GetURI(nsIURI **aURI) override;
    NS_IMETHOD GetNotificationCallbacks(nsIInterfaceRequestor **aCallbacks) override;
    NS_IMETHOD GetLoadGroup(nsILoadGroup **aLoadGroup) override;
    NS_IMETHOD GetRequestMethod(nsACString& aMethod) override;

    nsHttpChannel();

    virtual nsresult Init(nsIURI *aURI, uint32_t aCaps, nsProxyInfo *aProxyInfo,
                          uint32_t aProxyResolveFlags,
                          nsIURI *aProxyURI,
                          const nsID& aChannelId,
                          nsContentPolicyType aContentPolicyType) override;

    nsresult OnPush(const nsACString &uri, Http2PushedStreamWrapper *pushedStream);

    static bool IsRedirectStatus(uint32_t status);


    // Methods HttpBaseChannel didn't implement for us or that we override.
    //
    // nsIRequest
    NS_IMETHOD Cancel(nsresult status) override;
    NS_IMETHOD Suspend() override;
    NS_IMETHOD Resume() override;
    // nsIChannel
    NS_IMETHOD GetSecurityInfo(nsISupports **aSecurityInfo) override;
    NS_IMETHOD AsyncOpen(nsIStreamListener *listener, nsISupports *aContext) override;
    NS_IMETHOD AsyncOpen2(nsIStreamListener *aListener) override;
    // nsIHttpChannel
    NS_IMETHOD GetEncodedBodySize(uint64_t *aEncodedBodySize) override;
    // nsIHttpChannelInternal
    NS_IMETHOD SetupFallbackChannel(const char *aFallbackKey) override;
    NS_IMETHOD ForceIntercepted(uint64_t aInterceptionID) override;
    virtual mozilla::net::nsHttpChannel * QueryHttpChannelImpl(void) override;
    // nsISupportsPriority
    NS_IMETHOD SetPriority(int32_t value) override;
    // nsIClassOfService
    NS_IMETHOD SetClassFlags(uint32_t inFlags) override;
    NS_IMETHOD AddClassFlags(uint32_t inFlags) override;
    NS_IMETHOD ClearClassFlags(uint32_t inFlags) override;

    // nsIResumableChannel
    NS_IMETHOD ResumeAt(uint64_t startPos, const nsACString& entityID) override;

    NS_IMETHOD SetNotificationCallbacks(nsIInterfaceRequestor *aCallbacks) override;
    NS_IMETHOD SetLoadGroup(nsILoadGroup *aLoadGroup) override;
    // nsITimedChannel
    NS_IMETHOD GetDomainLookupStart(mozilla::TimeStamp *aDomainLookupStart) override;
    NS_IMETHOD GetDomainLookupEnd(mozilla::TimeStamp *aDomainLookupEnd) override;
    NS_IMETHOD GetConnectStart(mozilla::TimeStamp *aConnectStart) override;
    NS_IMETHOD GetSecureConnectionStart(mozilla::TimeStamp *aSecureConnectionStart) override;
    NS_IMETHOD GetConnectEnd(mozilla::TimeStamp *aConnectEnd) override;
    NS_IMETHOD GetRequestStart(mozilla::TimeStamp *aRequestStart) override;
    NS_IMETHOD GetResponseStart(mozilla::TimeStamp *aResponseStart) override;
    NS_IMETHOD GetResponseEnd(mozilla::TimeStamp *aResponseEnd) override;
    // nsICorsPreflightCallback
    NS_IMETHOD OnPreflightSucceeded() override;
    NS_IMETHOD OnPreflightFailed(nsresult aError) override;

    nsresult AddSecurityMessage(const nsAString& aMessageTag,
                                const nsAString& aMessageCategory) override;

    void SetWarningReporter(HttpChannelSecurityWarningReporter* aReporter)
      { mWarningReporter = aReporter; }

public: /* internal necko use only */

    void InternalSetUploadStream(nsIInputStream *uploadStream)
      { mUploadStream = uploadStream; }
    void SetUploadStreamHasHeaders(bool hasHeaders)
      { mUploadStreamHasHeaders = hasHeaders; }

    nsresult SetReferrerWithPolicyInternal(nsIURI *referrer,
                                           uint32_t referrerPolicy) {
        nsAutoCString spec;
        nsresult rv = referrer->GetAsciiSpec(spec);
        if (NS_FAILED(rv)) return rv;
        mReferrer = referrer;
        mReferrerPolicy = referrerPolicy;
        mRequestHead.SetHeader(nsHttp::Referer, spec);
        return NS_OK;
    }

    nsresult SetTopWindowURI(nsIURI* aTopWindowURI) {
        mTopWindowURI = aTopWindowURI;
        return NS_OK;
    }

    uint32_t GetRequestTime() const
    {
        return mRequestTime;
    }

    nsresult OpenCacheEntry(bool usingSSL);
    nsresult ContinueConnect();

    nsresult StartRedirectChannelToURI(nsIURI *, uint32_t);

    // This allows cache entry to be marked as foreign even after channel itself
    // is gone.  Needed for e10s (see HttpChannelParent::RecvDocumentChannelCleanup)
    class OfflineCacheEntryAsForeignMarker {
        nsCOMPtr<nsIApplicationCache> mApplicationCache;
        nsCOMPtr<nsIURI> mCacheURI;
    public:
        OfflineCacheEntryAsForeignMarker(nsIApplicationCache* appCache,
                                         nsIURI* aURI)
             : mApplicationCache(appCache)
             , mCacheURI(aURI)
        {}

        nsresult MarkAsForeign();
    };

    OfflineCacheEntryAsForeignMarker* GetOfflineCacheEntryAsForeignMarker();

    // Helper to keep cache callbacks wait flags consistent
    class AutoCacheWaitFlags
    {
    public:
      explicit AutoCacheWaitFlags(nsHttpChannel* channel)
        : mChannel(channel)
        , mKeep(0)
      {
        // Flags must be set before entering any AsyncOpenCacheEntry call.
        mChannel->mCacheEntriesToWaitFor =
          nsHttpChannel::WAIT_FOR_CACHE_ENTRY |
          nsHttpChannel::WAIT_FOR_OFFLINE_CACHE_ENTRY;
      }

      void Keep(uint32_t flags)
      {
        // Called after successful call to appropriate AsyncOpenCacheEntry call.
        mKeep |= flags;
      }

      ~AutoCacheWaitFlags()
      {
        // Keep only flags those are left to be wait for.
        mChannel->mCacheEntriesToWaitFor &= mKeep;
      }

    private:
      nsHttpChannel* mChannel;
      uint32_t mKeep : 2;
    };

    void MarkIntercepted();
    NS_IMETHOD GetResponseSynthesized(bool* aSynthesized) override;
    bool AwaitingCacheCallbacks();
    void SetCouldBeSynthesized();

private: // used for alternate service validation
    RefPtr<TransactionObserver> mTransactionObserver;
public:
    void SetConnectionInfo(nsHttpConnectionInfo *); // clones the argument
    void SetTransactionObserver(TransactionObserver *arg) { mTransactionObserver = arg; }
    TransactionObserver *GetTransactionObserver() { return mTransactionObserver; }

protected:
    virtual ~nsHttpChannel();

private:
    typedef nsresult (nsHttpChannel::*nsContinueRedirectionFunc)(nsresult result);

    bool     RequestIsConditional();
    nsresult BeginConnect();
    void     HandleBeginConnectContinue();
    MOZ_MUST_USE nsresult BeginConnectContinue();
    nsresult ContinueBeginConnectWithResult();
    void     ContinueBeginConnect();
    nsresult Connect();
    void     SpeculativeConnect();
    nsresult SetupTransaction();
    void     SetupTransactionRequestContext();
    nsresult CallOnStartRequest();
    nsresult ProcessResponse();
    void     AsyncContinueProcessResponse();
    nsresult ContinueProcessResponse1();
    nsresult ContinueProcessResponse2(nsresult);
    nsresult ContinueProcessResponse3(nsresult);
    nsresult ProcessNormal();
    nsresult ContinueProcessNormal(nsresult);
    void     ProcessAltService();
    bool     ShouldBypassProcessNotModified();
    nsresult ProcessNotModified();
    nsresult AsyncProcessRedirection(uint32_t httpStatus);
    nsresult ContinueProcessRedirection(nsresult);
    nsresult ContinueProcessRedirectionAfterFallback(nsresult);
    nsresult ProcessFailedProxyConnect(uint32_t httpStatus);
    nsresult ProcessFallback(bool *waitingForRedirectCallback);
    nsresult ContinueProcessFallback(nsresult);
    void     HandleAsyncAbort();
    nsresult EnsureAssocReq();
    void     ProcessSSLInformation();
    bool     IsHTTPS();

    nsresult ContinueOnStartRequest1(nsresult);
    nsresult ContinueOnStartRequest2(nsresult);
    nsresult ContinueOnStartRequest3(nsresult);

    // redirection specific methods
    void     HandleAsyncRedirect();
    void     HandleAsyncAPIRedirect();
    nsresult ContinueHandleAsyncRedirect(nsresult);
    void     HandleAsyncNotModified();
    void     HandleAsyncFallback();
    nsresult ContinueHandleAsyncFallback(nsresult);
    nsresult PromptTempRedirect();
    virtual  nsresult SetupReplacementChannel(nsIURI *, nsIChannel *,
                                              bool preserveMethod,
                                              uint32_t redirectFlags) override;

    // proxy specific methods
    nsresult ProxyFailover();
    nsresult AsyncDoReplaceWithProxy(nsIProxyInfo *);
    nsresult ContinueDoReplaceWithProxy(nsresult);
    nsresult ResolveProxy();

    // cache specific methods
    nsresult OnOfflineCacheEntryAvailable(nsICacheEntry *aEntry,
                                          bool aNew,
                                          nsIApplicationCache* aAppCache,
                                          nsresult aResult);
    nsresult OnNormalCacheEntryAvailable(nsICacheEntry *aEntry,
                                         bool aNew,
                                         nsresult aResult);
    nsresult OpenOfflineCacheEntryForWriting();
    nsresult OnOfflineCacheEntryForWritingAvailable(nsICacheEntry *aEntry,
                                                    nsIApplicationCache* aAppCache,
                                                    nsresult aResult);
    nsresult OnCacheEntryAvailableInternal(nsICacheEntry *entry,
                                      bool aNew,
                                      nsIApplicationCache* aAppCache,
                                      nsresult status);
    nsresult GenerateCacheKey(uint32_t postID, nsACString &key);
    nsresult UpdateExpirationTime();
    nsresult CheckPartial(nsICacheEntry* aEntry, int64_t *aSize, int64_t *aContentLength);
    bool ShouldUpdateOfflineCacheEntry();
    nsresult ReadFromCache(bool alreadyMarkedValid);
    void     CloseCacheEntry(bool doomOnFailure);
    void     CloseOfflineCacheEntry();
    nsresult InitCacheEntry();
    void     UpdateInhibitPersistentCachingFlag();
    nsresult InitOfflineCacheEntry();
    nsresult AddCacheEntryHeaders(nsICacheEntry *entry);
    nsresult FinalizeCacheEntry();
    nsresult InstallCacheListener(int64_t offset = 0);
    nsresult InstallOfflineCacheListener(int64_t offset = 0);
    void     MaybeInvalidateCacheEntryForSubsequentGet();
    void     AsyncOnExamineCachedResponse();

    // Handle the bogus Content-Encoding Apache sometimes sends
    void ClearBogusContentEncodingIfNeeded();

    // byte range request specific methods
    nsresult ProcessPartialContent();
    nsresult OnDoneReadingPartialCacheEntry(bool *streamDone);

    nsresult DoAuthRetry(nsAHttpConnection *);

    void     HandleAsyncRedirectChannelToHttps();
    nsresult StartRedirectChannelToHttps();
    nsresult ContinueAsyncRedirectChannelToURI(nsresult rv);
    nsresult OpenRedirectChannel(nsresult rv);

    /**
     * A function that takes care of reading STS and PKP headers and enforcing
     * STS and PKP load rules. After a secure channel is erected, STS and PKP
     * requires the channel to be trusted or any STS or PKP header data on
     * the channel is ignored. This is called from ProcessResponse.
     */
    nsresult ProcessSecurityHeaders();

    /**
     * Taking care of the Content-Signature header and fail the channel if
     * the signature verification fails or is required but the header is not
     * present.
     * This sets mListener to ContentVerifier, which buffers the entire response
     * before verifying the Content-Signature header. If the verification is
     * successful, the load proceeds as usual. If the verification fails, a
     * NS_ERROR_INVALID_SIGNATURE is thrown and a fallback loaded in nsDocShell
     */
    nsresult ProcessContentSignatureHeader(nsHttpResponseHead *aResponseHead);

    /**
     * A function that will, if the feature is enabled, send security reports.
     */
    void ProcessSecurityReport(nsresult status);

    /**
     * A function to process a single security header (STS or PKP), assumes
     * some basic sanity checks have been applied to the channel. Called
     * from ProcessSecurityHeaders.
     */
    nsresult ProcessSingleSecurityHeader(uint32_t aType,
                                         nsISSLStatus *aSSLStatus,
                                         uint32_t aFlags);

    void InvalidateCacheEntryForLocation(const char *location);
    void AssembleCacheKey(const char *spec, uint32_t postID, nsACString &key);
    nsresult CreateNewURI(const char *loc, nsIURI **newURI);
    void DoInvalidateCacheEntry(nsIURI* aURI);

    // Ref RFC2616 13.10: "invalidation... MUST only be performed if
    // the host part is the same as in the Request-URI"
    inline bool HostPartIsTheSame(nsIURI *uri) {
        nsAutoCString tmpHost1, tmpHost2;
        return (NS_SUCCEEDED(mURI->GetAsciiHost(tmpHost1)) &&
                NS_SUCCEEDED(uri->GetAsciiHost(tmpHost2)) &&
                (tmpHost1 == tmpHost2));
    }

    inline static bool DoNotRender3xxBody(nsresult rv) {
        return rv == NS_ERROR_REDIRECT_LOOP         ||
               rv == NS_ERROR_CORRUPTED_CONTENT     ||
               rv == NS_ERROR_UNKNOWN_PROTOCOL      ||
               rv == NS_ERROR_MALFORMED_URI;
    }

    // Create a aggregate set of the current notification callbacks
    // and ensure the transaction is updated to use it.
    void UpdateAggregateCallbacks();

    static bool HasQueryString(nsHttpRequestHead::ParsedMethodType method, nsIURI * uri);
    bool ResponseWouldVary(nsICacheEntry* entry);
    bool IsResumable(int64_t partialLen, int64_t contentLength,
                     bool ignoreMissingPartialLen = false) const;
    nsresult MaybeSetupByteRangeRequest(int64_t partialLen, int64_t contentLength,
                                        bool ignoreMissingPartialLen = false);
    nsresult SetupByteRangeRequest(int64_t partialLen);
    void UntieByteRangeRequest();
    void UntieValidationRequest();
    nsresult OpenCacheInputStream(nsICacheEntry* cacheEntry, bool startBuffering,
                                  bool checkingAppCacheEntry);

    void SetPushedStream(Http2PushedStreamWrapper *stream);

    void SetDoNotTrack();

private:
    nsCOMPtr<nsICancelable>           mProxyRequest;

    RefPtr<nsInputStreamPump>       mTransactionPump;
    RefPtr<nsHttpTransaction>       mTransaction;

    uint64_t                          mLogicalOffset;

    // cache specific data
    nsCOMPtr<nsICacheEntry>           mCacheEntry;
    // This will be set during OnStopRequest() before calling CloseCacheEntry(),
    // but only if the listener wants to use alt-data (signaled by
    // HttpBaseChannel::mPreferredCachedAltDataType being not empty)
    // Needed because calling openAlternativeOutputStream needs a reference
    // to the cache entry.
    nsCOMPtr<nsICacheEntry>           mAltDataCacheEntry;
    // We must close mCacheInputStream explicitly to avoid leaks.
    AutoClose<nsIInputStream>         mCacheInputStream;
    RefPtr<nsInputStreamPump>       mCachePump;
    nsAutoPtr<nsHttpResponseHead>     mCachedResponseHead;
    nsCOMPtr<nsISupports>             mCachedSecurityInfo;
    uint32_t                          mPostID;
    uint32_t                          mRequestTime;

    nsCOMPtr<nsICacheEntry> mOfflineCacheEntry;
    uint32_t                          mOfflineCacheLastModifiedTime;
    nsCOMPtr<nsIApplicationCache>     mApplicationCacheForWrite;

    // auth specific data
    nsCOMPtr<nsIHttpChannelAuthProvider> mAuthProvider;

    mozilla::TimeStamp                mOnStartRequestTimestamp;

    // States of channel interception
    enum {
        DO_NOT_INTERCEPT,  // no interception will occur
        MAYBE_INTERCEPT,   // interception in progress, but can be cancelled
        INTERCEPTED,       // a synthesized response has been provided
    } mInterceptCache;
    // ID of this channel for the interception purposes. Unique unless this
    // channel is replacing an intercepted one via an redirection.
    uint64_t mInterceptionID;

    bool PossiblyIntercepted() {
        return mInterceptCache != DO_NOT_INTERCEPT;
    }

    // If the channel is associated with a cache, and the URI matched
    // a fallback namespace, this will hold the key for the fallback
    // cache entry.
    nsCString                         mFallbackKey;

    friend class AutoRedirectVetoNotifier;
    friend class HttpAsyncAborter<nsHttpChannel>;

    nsCOMPtr<nsIURI>                  mRedirectURI;
    nsCOMPtr<nsIChannel>              mRedirectChannel;
    uint32_t                          mRedirectType;

    static const uint32_t WAIT_FOR_CACHE_ENTRY = 1;
    static const uint32_t WAIT_FOR_OFFLINE_CACHE_ENTRY = 2;

    bool                              mCacheOpenWithPriority;
    uint32_t                          mCacheQueueSizeWhenOpen;

    // state flags
    uint32_t                          mCachedContentIsValid     : 1;
    uint32_t                          mCachedContentIsPartial   : 1;
    uint32_t                          mCacheOnlyMetadata        : 1;
    uint32_t                          mTransactionReplaced      : 1;
    uint32_t                          mAuthRetryPending         : 1;
    uint32_t                          mProxyAuthPending         : 1;
    // Set if before the first authentication attempt a custom authorization
    // header has been set on the channel.  This will make that custom header
    // go to the server instead of any cached credentials.
    uint32_t                          mCustomAuthHeader         : 1;
    uint32_t                          mResuming                 : 1;
    uint32_t                          mInitedCacheEntry         : 1;
    // True if we are loading a fallback cache entry from the
    // application cache.
    uint32_t                          mFallbackChannel          : 1;
    // True if consumer added its own If-None-Match or If-Modified-Since
    // headers. In such a case we must not override them in the cache code
    // and also we want to pass possible 304 code response through.
    uint32_t                          mCustomConditionalRequest : 1;
    uint32_t                          mFallingBack              : 1;
    uint32_t                          mWaitingForRedirectCallback : 1;
    // True if mRequestTime has been set. In such a case it is safe to update
    // the cache entry's expiration time. Otherwise, it is not(see bug 567360).
    uint32_t                          mRequestTimeInitialized : 1;
    uint32_t                          mCacheEntryIsReadOnly : 1;
    uint32_t                          mCacheEntryIsWriteOnly : 1;
    // see WAIT_FOR_* constants above
    uint32_t                          mCacheEntriesToWaitFor : 2;
    uint32_t                          mHasQueryString : 1;
    // whether cache entry data write was in progress during cache entry check
    // when true, after we finish read from cache we must check all data
    // had been loaded from cache. If not, then an error has to be propagated
    // to the consumer.
    uint32_t                          mConcurrentCacheAccess : 1;
    // whether the request is setup be byte-range
    uint32_t                          mIsPartialRequest : 1;
    // true iff there is AutoRedirectVetoNotifier on the stack
    uint32_t                          mHasAutoRedirectVetoNotifier : 1;
    // consumers set this to true to use cache pinning, this has effect
    // only when the channel is in an app context (load context has an appid)
    uint32_t                          mPinCacheContent : 1;
    // True if CORS preflight has been performed
    uint32_t                          mIsCorsPreflightDone : 1;

    // if the http transaction was performed (i.e. not cached) and
    // the result in OnStopRequest was known to be correctly delimited
    // by chunking, content-length, or h2 end-stream framing
    uint32_t                          mStronglyFramed : 1;

    // true if an HTTP transaction is created for the socket thread
    uint32_t                          mUsedNetwork : 1;

    // the next authentication request can be sent on a whole new connection
    uint32_t                          mAuthConnectionRestartable : 1;

    nsCOMPtr<nsIChannel>              mPreflightChannel;

    nsTArray<nsContinueRedirectionFunc> mRedirectFuncStack;

    // Needed for accurate DNS timing
    RefPtr<nsDNSPrefetch>             mDNSPrefetch;

    RefPtr<Http2PushedStreamWrapper>  mPushedStream;
    
    // True if the channel's principal was found on a phishing, malware, or
    // tracking (if tracking protection is enabled) blocklist
    bool                              mLocalBlocklist;

    nsresult WaitForRedirectCallback();
    void PushRedirectAsyncFunc(nsContinueRedirectionFunc func);
    void PopRedirectAsyncFunc(nsContinueRedirectionFunc func);

    nsCString mUsername;

    // If non-null, warnings should be reported to this object.
    HttpChannelSecurityWarningReporter* mWarningReporter;

    RefPtr<ADivertableParentChannel> mParentChannel;
    
    // Whether we send opportunistic encryption requests.
    bool mSendUpgradeRequest;

protected:
    virtual void DoNotifyListenerCleanup() override;

private: // cache telemetry
    bool mDidReval;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsHttpChannel, NS_HTTPCHANNEL_IID)
} // namespace net
} // namespace mozilla

#endif // nsHttpChannel_h__