Add m-esr52 at 52.6.0

1 files changed, 2908 insertions, 0 deletions

diff --git a/dom/base/WebSocket.cpp b/dom/base/WebSocket.cpp
new file mode 100644
index 000000000..d85bae82b
--- /dev/null
+++ b/dom/base/WebSocket.cpp
@@ -0,0 +1,2908 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#include "WebSocket.h"
+#include "mozilla/dom/WebSocketBinding.h"
+#include "mozilla/net/WebSocketChannel.h"
+
+#include "jsapi.h"
+#include "jsfriendapi.h"
+#include "mozilla/CheckedInt.h"
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/net/WebSocketChannel.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/MessageEvent.h"
+#include "mozilla/dom/MessageEventBinding.h"
+#include "mozilla/dom/nsCSPContext.h"
+#include "mozilla/dom/nsCSPUtils.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/WorkerPrivate.h"
+#include "mozilla/dom/WorkerRunnable.h"
+#include "mozilla/dom/WorkerScope.h"
+#include "nsAutoPtr.h"
+#include "nsGlobalWindow.h"
+#include "nsIScriptGlobalObject.h"
+#include "nsIDOMWindow.h"
+#include "nsIDocument.h"
+#include "nsXPCOM.h"
+#include "nsIXPConnect.h"
+#include "nsContentUtils.h"
+#include "nsError.h"
+#include "nsIScriptObjectPrincipal.h"
+#include "nsIURL.h"
+#include "nsIUnicodeEncoder.h"
+#include "nsThreadUtils.h"
+#include "nsIPromptFactory.h"
+#include "nsIWindowWatcher.h"
+#include "nsIPrompt.h"
+#include "nsIStringBundle.h"
+#include "nsIConsoleService.h"
+#include "mozilla/dom/CloseEvent.h"
+#include "mozilla/net/WebSocketEventService.h"
+#include "nsICryptoHash.h"
+#include "nsJSUtils.h"
+#include "nsIScriptError.h"
+#include "nsNetUtil.h"
+#include "nsIAuthPrompt.h"
+#include "nsIAuthPrompt2.h"
+#include "nsILoadGroup.h"
+#include "mozilla/Preferences.h"
+#include "xpcpublic.h"
+#include "nsContentPolicyUtils.h"
+#include "nsWrapperCacheInlines.h"
+#include "nsIObserverService.h"
+#include "nsIEventTarget.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsIObserver.h"
+#include "nsIRequest.h"
+#include "nsIThreadRetargetableRequest.h"
+#include "nsIWebSocketChannel.h"
+#include "nsIWebSocketListener.h"
+#include "nsProxyRelease.h"
+#include "nsWeakReference.h"
+
+using namespace mozilla::net;
+using namespace mozilla::dom::workers;
+
+namespace mozilla {
+namespace dom {
+
+class WebSocketImpl final : public nsIInterfaceRequestor
+                          , public nsIWebSocketListener
+                          , public nsIObserver
+                          , public nsSupportsWeakReference
+                          , public nsIRequest
+                          , public nsIEventTarget
+{
+public:
+  NS_DECL_NSIINTERFACEREQUESTOR
+  NS_DECL_NSIWEBSOCKETLISTENER
+  NS_DECL_NSIOBSERVER
+  NS_DECL_NSIREQUEST
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIEVENTTARGET
+  using nsIEventTarget::Dispatch;
+
+  explicit WebSocketImpl(WebSocket* aWebSocket)
+  : mWebSocket(aWebSocket)
+  , mIsServerSide(false)
+  , mSecure(false)
+  , mOnCloseScheduled(false)
+  , mFailed(false)
+  , mDisconnectingOrDisconnected(false)
+  , mCloseEventWasClean(false)
+  , mCloseEventCode(nsIWebSocketChannel::CLOSE_ABNORMAL)
+  , mScriptLine(0)
+  , mScriptColumn(0)
+  , mInnerWindowID(0)
+  , mWorkerPrivate(nullptr)
+#ifdef DEBUG
+  , mHasWorkerHolderRegistered(false)
+#endif
+  , mIsMainThread(true)
+  , mMutex("WebSocketImpl::mMutex")
+  , mWorkerShuttingDown(false)
+  {
+    if (!NS_IsMainThread()) {
+      mWorkerPrivate = GetCurrentThreadWorkerPrivate();
+      MOZ_ASSERT(mWorkerPrivate);
+      mIsMainThread = false;
+    }
+  }
+
+  void AssertIsOnTargetThread() const
+  {
+    MOZ_ASSERT(IsTargetThread());
+  }
+
+  bool IsTargetThread() const;
+
+  void Init(JSContext* aCx,
+            nsIPrincipal* aPrincipal,
+            bool aIsServerSide,
+            const nsAString& aURL,
+            nsTArray<nsString>& aProtocolArray,
+            const nsACString& aScriptFile,
+            uint32_t aScriptLine,
+            uint32_t aScriptColumn,
+            ErrorResult& aRv,
+            bool* aConnectionFailed);
+
+  void AsyncOpen(nsIPrincipal* aPrincipal, uint64_t aInnerWindowID,
+                 nsITransportProvider* aTransportProvider,
+                 const nsACString& aNegotiatedExtensions,
+                 ErrorResult& aRv);
+
+  nsresult ParseURL(const nsAString& aURL);
+  nsresult InitializeConnection(nsIPrincipal* aPrincipal);
+
+  // These methods when called can release the WebSocket object
+  void FailConnection(uint16_t reasonCode,
+                      const nsACString& aReasonString = EmptyCString());
+  nsresult CloseConnection(uint16_t reasonCode,
+                           const nsACString& aReasonString = EmptyCString());
+  void Disconnect();
+  void DisconnectInternal();
+
+  nsresult ConsoleError();
+  void PrintErrorOnConsole(const char* aBundleURI,
+                           const char16_t* aError,
+                           const char16_t** aFormatStrings,
+                           uint32_t aFormatStringsLen);
+
+  nsresult DoOnMessageAvailable(const nsACString& aMsg,
+                                bool isBinary);
+
+  // ConnectionCloseEvents: 'error' event if needed, then 'close' event.
+  nsresult ScheduleConnectionCloseEvents(nsISupports* aContext,
+                                         nsresult aStatusCode);
+  // 2nd half of ScheduleConnectionCloseEvents, run in its own event.
+  void DispatchConnectionCloseEvents();
+
+  nsresult UpdateURI();
+
+  void AddRefObject();
+  void ReleaseObject();
+
+  bool RegisterWorkerHolder();
+  void UnregisterWorkerHolder();
+
+  nsresult CancelInternal();
+
+  RefPtr<WebSocket> mWebSocket;
+
+  nsCOMPtr<nsIWebSocketChannel> mChannel;
+
+  bool mIsServerSide; // True if we're implementing the server side of a
+                      // websocket connection
+
+  bool mSecure; // if true it is using SSL and the wss scheme,
+                // otherwise it is using the ws scheme with no SSL
+
+  bool mOnCloseScheduled;
+  bool mFailed;
+  bool mDisconnectingOrDisconnected;
+
+  // Set attributes of DOM 'onclose' message
+  bool      mCloseEventWasClean;
+  nsString  mCloseEventReason;
+  uint16_t  mCloseEventCode;
+
+  nsCString mAsciiHost;  // hostname
+  uint32_t  mPort;
+  nsCString mResource; // [filepath[?query]]
+  nsString  mUTF16Origin;
+
+  nsCString mURI;
+  nsCString mRequestedProtocolList;
+
+  nsWeakPtr mOriginDocument;
+
+  // Web Socket owner information:
+  // - the script file name, UTF8 encoded.
+  // - source code line number and column number where the Web Socket object
+  //   was constructed.
+  // - the ID of the inner window where the script lives. Note that this may not
+  //   be the same as the Web Socket owner window.
+  // These attributes are used for error reporting.
+  nsCString mScriptFile;
+  uint32_t mScriptLine;
+  uint32_t mScriptColumn;
+  uint64_t mInnerWindowID;
+
+  WorkerPrivate* mWorkerPrivate;
+  nsAutoPtr<WorkerHolder> mWorkerHolder;
+
+#ifdef DEBUG
+  // This is protected by mutex.
+  bool mHasWorkerHolderRegistered;
+
+  bool HasWorkerHolderRegistered()
+  {
+    MOZ_ASSERT(mWebSocket);
+    MutexAutoLock lock(mWebSocket->mMutex);
+    return mHasWorkerHolderRegistered;
+  }
+
+  void SetHasWorkerHolderRegistered(bool aValue)
+  {
+    MOZ_ASSERT(mWebSocket);
+    MutexAutoLock lock(mWebSocket->mMutex);
+    mHasWorkerHolderRegistered = aValue;
+  }
+#endif
+
+  nsWeakPtr mWeakLoadGroup;
+
+  bool mIsMainThread;
+
+  // This mutex protects mWorkerShuttingDown.
+  mozilla::Mutex mMutex;
+  bool mWorkerShuttingDown;
+
+  RefPtr<WebSocketEventService> mService;
+
+private:
+  ~WebSocketImpl()
+  {
+    // If we threw during Init we never called disconnect
+    if (!mDisconnectingOrDisconnected) {
+      Disconnect();
+    }
+  }
+};
+
+NS_IMPL_ISUPPORTS(WebSocketImpl,
+                  nsIInterfaceRequestor,
+                  nsIWebSocketListener,
+                  nsIObserver,
+                  nsISupportsWeakReference,
+                  nsIRequest,
+                  nsIEventTarget)
+
+class CallDispatchConnectionCloseEvents final : public CancelableRunnable
+{
+public:
+  explicit CallDispatchConnectionCloseEvents(WebSocketImpl* aWebSocketImpl)
+    : mWebSocketImpl(aWebSocketImpl)
+  {
+    aWebSocketImpl->AssertIsOnTargetThread();
+  }
+
+  NS_IMETHOD Run() override
+  {
+    mWebSocketImpl->AssertIsOnTargetThread();
+    mWebSocketImpl->DispatchConnectionCloseEvents();
+    return NS_OK;
+  }
+
+private:
+  RefPtr<WebSocketImpl> mWebSocketImpl;
+};
+
+//-----------------------------------------------------------------------------
+// WebSocketImpl
+//-----------------------------------------------------------------------------
+
+namespace {
+
+class PrintErrorOnConsoleRunnable final : public WorkerMainThreadRunnable
+{
+public:
+  PrintErrorOnConsoleRunnable(WebSocketImpl* aImpl,
+                              const char* aBundleURI,
+                              const char16_t* aError,
+                              const char16_t** aFormatStrings,
+                              uint32_t aFormatStringsLen)
+    : WorkerMainThreadRunnable(aImpl->mWorkerPrivate,
+                               NS_LITERAL_CSTRING("WebSocket :: print error on console"))
+    , mImpl(aImpl)
+    , mBundleURI(aBundleURI)
+    , mError(aError)
+    , mFormatStrings(aFormatStrings)
+    , mFormatStringsLen(aFormatStringsLen)
+  { }
+
+  bool MainThreadRun() override
+  {
+    mImpl->PrintErrorOnConsole(mBundleURI, mError, mFormatStrings,
+                               mFormatStringsLen);
+    return true;
+  }
+
+private:
+  // Raw pointer because this runnable is sync.
+  WebSocketImpl* mImpl;
+
+  const char* mBundleURI;
+  const char16_t* mError;
+  const char16_t** mFormatStrings;
+  uint32_t mFormatStringsLen;
+};
+
+} // namespace
+
+void
+WebSocketImpl::PrintErrorOnConsole(const char *aBundleURI,
+                                   const char16_t *aError,
+                                   const char16_t **aFormatStrings,
+                                   uint32_t aFormatStringsLen)
+{
+  // This method must run on the main thread.
+
+  if (!NS_IsMainThread()) {
+    MOZ_ASSERT(mWorkerPrivate);
+
+    RefPtr<PrintErrorOnConsoleRunnable> runnable =
+      new PrintErrorOnConsoleRunnable(this, aBundleURI, aError, aFormatStrings,
+                                      aFormatStringsLen);
+    ErrorResult rv;
+    runnable->Dispatch(rv);
+    // XXXbz this seems totally broken.  We should be propagating this out, but
+    // none of our callers really propagate anything usefully.  Come to think of
+    // it, why is this a syncrunnable anyway?  Can't this be a fire-and-forget
+    // runnable??
+    rv.SuppressException();
+    return;
+  }
+
+  nsresult rv;
+  nsCOMPtr<nsIStringBundleService> bundleService =
+    do_GetService(NS_STRINGBUNDLE_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS_VOID(rv);
+
+  nsCOMPtr<nsIStringBundle> strBundle;
+  rv = bundleService->CreateBundle(aBundleURI, getter_AddRefs(strBundle));
+  NS_ENSURE_SUCCESS_VOID(rv);
+
+  nsCOMPtr<nsIConsoleService> console(
+    do_GetService(NS_CONSOLESERVICE_CONTRACTID, &rv));
+  NS_ENSURE_SUCCESS_VOID(rv);
+
+  nsCOMPtr<nsIScriptError> errorObject(
+    do_CreateInstance(NS_SCRIPTERROR_CONTRACTID, &rv));
+  NS_ENSURE_SUCCESS_VOID(rv);
+
+  // Localize the error message
+  nsXPIDLString message;
+  if (aFormatStrings) {
+    rv = strBundle->FormatStringFromName(aError, aFormatStrings,
+                                         aFormatStringsLen,
+                                         getter_Copies(message));
+  } else {
+    rv = strBundle->GetStringFromName(aError, getter_Copies(message));
+  }
+  NS_ENSURE_SUCCESS_VOID(rv);
+
+  if (mInnerWindowID) {
+    rv = errorObject->InitWithWindowID(message,
+                                       NS_ConvertUTF8toUTF16(mScriptFile),
+                                       EmptyString(), mScriptLine,
+                                       mScriptColumn,
+                                       nsIScriptError::errorFlag, "Web Socket",
+                                       mInnerWindowID);
+  } else {
+    rv = errorObject->Init(message,
+                           NS_ConvertUTF8toUTF16(mScriptFile),
+                           EmptyString(), mScriptLine, mScriptColumn,
+                           nsIScriptError::errorFlag, "Web Socket");
+  }
+
+  NS_ENSURE_SUCCESS_VOID(rv);
+
+  // print the error message directly to the JS console
+  rv = console->LogMessage(errorObject);
+  NS_ENSURE_SUCCESS_VOID(rv);
+}
+
+namespace {
+
+class CancelWebSocketRunnable final : public Runnable
+{
+public:
+  CancelWebSocketRunnable(nsIWebSocketChannel* aChannel, uint16_t aReasonCode,
+                          const nsACString& aReasonString)
+    : mChannel(aChannel)
+    , mReasonCode(aReasonCode)
+    , mReasonString(aReasonString)
+  {}
+
+  NS_IMETHOD Run() override
+  {
+    mChannel->Close(mReasonCode, mReasonString);
+    return NS_OK;
+  }
+
+private:
+  nsCOMPtr<nsIWebSocketChannel> mChannel;
+  uint16_t mReasonCode;
+  nsCString mReasonString;
+};
+
+class MOZ_STACK_CLASS MaybeDisconnect
+{
+public:
+  explicit MaybeDisconnect(WebSocketImpl* aImpl)
+    : mImpl(aImpl)
+  {
+  }
+
+  ~MaybeDisconnect()
+  {
+    bool toDisconnect = false;
+
+    {
+      MutexAutoLock lock(mImpl->mMutex);
+      toDisconnect = mImpl->mWorkerShuttingDown;
+    }
+
+    if (toDisconnect) {
+      mImpl->Disconnect();
+    }
+  }
+
+private:
+  WebSocketImpl* mImpl;
+};
+
+class CloseConnectionRunnable final : public Runnable
+{
+public:
+  CloseConnectionRunnable(WebSocketImpl* aImpl,
+                          uint16_t aReasonCode,
+                          const nsACString& aReasonString)
+    : mImpl(aImpl)
+    , mReasonCode(aReasonCode)
+    , mReasonString(aReasonString)
+  {}
+
+  NS_IMETHOD Run() override
+  {
+    return mImpl->CloseConnection(mReasonCode, mReasonString);
+  }
+
+private:
+  RefPtr<WebSocketImpl> mImpl;
+  uint16_t mReasonCode;
+  const nsCString mReasonString;
+};
+
+} // namespace
+
+nsresult
+WebSocketImpl::CloseConnection(uint16_t aReasonCode,
+                               const nsACString& aReasonString)
+{
+  if (!IsTargetThread()) {
+    nsCOMPtr<nsIRunnable> runnable =
+      new CloseConnectionRunnable(this, aReasonCode, aReasonString);
+    return Dispatch(runnable.forget(), NS_DISPATCH_NORMAL);
+  }
+
+  AssertIsOnTargetThread();
+
+  if (mDisconnectingOrDisconnected) {
+    return NS_OK;
+  }
+
+  // If this method is called because the worker is going away, we will not
+  // receive the OnStop() method and we have to disconnect the WebSocket and
+  // release the WorkerHolder.
+  MaybeDisconnect md(this);
+
+  uint16_t readyState = mWebSocket->ReadyState();
+  if (readyState == WebSocket::CLOSING ||
+      readyState == WebSocket::CLOSED) {
+    return NS_OK;
+  }
+
+  // The common case...
+  if (mChannel) {
+    mWebSocket->SetReadyState(WebSocket::CLOSING);
+
+    // The channel has to be closed on the main-thread.
+
+    if (NS_IsMainThread()) {
+      return mChannel->Close(aReasonCode, aReasonString);
+    }
+
+    RefPtr<CancelWebSocketRunnable> runnable =
+      new CancelWebSocketRunnable(mChannel, aReasonCode, aReasonString);
+    return NS_DispatchToMainThread(runnable);
+  }
+
+  // No channel, but not disconnected: canceled or failed early
+  MOZ_ASSERT(readyState == WebSocket::CONNECTING,
+             "Should only get here for early websocket cancel/error");
+
+  // Server won't be sending us a close code, so use what's passed in here.
+  mCloseEventCode = aReasonCode;
+  CopyUTF8toUTF16(aReasonString, mCloseEventReason);
+
+  mWebSocket->SetReadyState(WebSocket::CLOSING);
+
+  ScheduleConnectionCloseEvents(
+                    nullptr,
+                    (aReasonCode == nsIWebSocketChannel::CLOSE_NORMAL ||
+                     aReasonCode == nsIWebSocketChannel::CLOSE_GOING_AWAY) ?
+                     NS_OK : NS_ERROR_FAILURE);
+
+  return NS_OK;
+}
+
+nsresult
+WebSocketImpl::ConsoleError()
+{
+  AssertIsOnTargetThread();
+
+  {
+    MutexAutoLock lock(mMutex);
+    if (mWorkerShuttingDown) {
+      // Too late to report anything, bail out.
+      return NS_OK;
+    }
+  }
+
+  NS_ConvertUTF8toUTF16 specUTF16(mURI);
+  const char16_t* formatStrings[] = { specUTF16.get() };
+
+  if (mWebSocket->ReadyState() < WebSocket::OPEN) {
+    PrintErrorOnConsole("chrome://global/locale/appstrings.properties",
+                        u"connectionFailure",
+                        formatStrings, ArrayLength(formatStrings));
+  } else {
+    PrintErrorOnConsole("chrome://global/locale/appstrings.properties",
+                        u"netInterrupt",
+                        formatStrings, ArrayLength(formatStrings));
+  }
+  /// todo some specific errors - like for message too large
+  return NS_OK;
+}
+
+void
+WebSocketImpl::FailConnection(uint16_t aReasonCode,
+                              const nsACString& aReasonString)
+{
+  AssertIsOnTargetThread();
+
+  if (mDisconnectingOrDisconnected) {
+    return;
+  }
+
+  ConsoleError();
+  mFailed = true;
+  CloseConnection(aReasonCode, aReasonString);
+}
+
+namespace {
+
+class DisconnectInternalRunnable final : public WorkerMainThreadRunnable
+{
+public:
+  explicit DisconnectInternalRunnable(WebSocketImpl* aImpl)
+    : WorkerMainThreadRunnable(aImpl->mWorkerPrivate,
+                               NS_LITERAL_CSTRING("WebSocket :: disconnect"))
+    , mImpl(aImpl)
+  { }
+
+  bool MainThreadRun() override
+  {
+    mImpl->DisconnectInternal();
+    return true;
+  }
+
+private:
+  // A raw pointer because this runnable is sync.
+  WebSocketImpl* mImpl;
+};
+
+} // namespace
+
+void
+WebSocketImpl::Disconnect()
+{
+  if (mDisconnectingOrDisconnected) {
+    return;
+  }
+
+  AssertIsOnTargetThread();
+
+  // DontKeepAliveAnyMore() and DisconnectInternal() can release the object. So
+  // hold a reference to this until the end of the method.
+  RefPtr<WebSocketImpl> kungfuDeathGrip = this;
+
+  // Disconnect can be called from some control event (such as Notify() of
+  // WorkerHolder). This will be schedulated before any other sync/async
+  // runnable. In order to prevent some double Disconnect() calls, we use this
+  // boolean.
+  mDisconnectingOrDisconnected = true;
+
+  // DisconnectInternal touches observers and nsILoadGroup and it must run on
+  // the main thread.
+
+  if (NS_IsMainThread()) {
+    DisconnectInternal();
+  } else {
+    RefPtr<DisconnectInternalRunnable> runnable =
+      new DisconnectInternalRunnable(this);
+    ErrorResult rv;
+    runnable->Dispatch(rv);
+    // XXXbz this seems totally broken.  We should be propagating this out, but
+    // where to, exactly?
+    rv.SuppressException();
+  }
+
+  NS_ReleaseOnMainThread(mChannel.forget());
+  NS_ReleaseOnMainThread(mService.forget());
+
+  mWebSocket->DontKeepAliveAnyMore();
+  mWebSocket->mImpl = nullptr;
+
+  if (mWorkerPrivate && mWorkerHolder) {
+    UnregisterWorkerHolder();
+  }
+
+  // We want to release the WebSocket in the correct thread.
+  mWebSocket = nullptr;
+}
+
+void
+WebSocketImpl::DisconnectInternal()
+{
+  AssertIsOnMainThread();
+
+  nsCOMPtr<nsILoadGroup> loadGroup = do_QueryReferent(mWeakLoadGroup);
+  if (loadGroup) {
+    loadGroup->RemoveRequest(this, nullptr, NS_OK);
+    // mWeakLoadGroup has to be release on main-thread because WeakReferences
+    // are not thread-safe.
+    mWeakLoadGroup = nullptr;
+  }
+
+  if (!mWorkerPrivate) {
+    nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
+    if (os) {
+      os->RemoveObserver(this, DOM_WINDOW_DESTROYED_TOPIC);
+      os->RemoveObserver(this, DOM_WINDOW_FROZEN_TOPIC);
+    }
+  }
+}
+
+//-----------------------------------------------------------------------------
+// WebSocketImpl::nsIWebSocketListener methods:
+//-----------------------------------------------------------------------------
+
+nsresult
+WebSocketImpl::DoOnMessageAvailable(const nsACString& aMsg, bool isBinary)
+{
+  AssertIsOnTargetThread();
+
+  if (mDisconnectingOrDisconnected) {
+    return NS_OK;
+  }
+
+  int16_t readyState = mWebSocket->ReadyState();
+  if (readyState == WebSocket::CLOSED) {
+    NS_ERROR("Received message after CLOSED");
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  if (readyState == WebSocket::OPEN) {
+    // Dispatch New Message
+    nsresult rv = mWebSocket->CreateAndDispatchMessageEvent(aMsg, isBinary);
+    if (NS_FAILED(rv)) {
+      NS_WARNING("Failed to dispatch the message event");
+    }
+
+    return NS_OK;
+  }
+
+  // CLOSING should be the only other state where it's possible to get msgs
+  // from channel: Spec says to drop them.
+  MOZ_ASSERT(readyState == WebSocket::CLOSING,
+             "Received message while CONNECTING or CLOSED");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::OnMessageAvailable(nsISupports* aContext,
+                                  const nsACString& aMsg)
+{
+  AssertIsOnTargetThread();
+
+  if (mDisconnectingOrDisconnected) {
+    return NS_OK;
+  }
+
+  return DoOnMessageAvailable(aMsg, false);
+}
+
+NS_IMETHODIMP
+WebSocketImpl::OnBinaryMessageAvailable(nsISupports* aContext,
+                                        const nsACString& aMsg)
+{
+  AssertIsOnTargetThread();
+
+  if (mDisconnectingOrDisconnected) {
+    return NS_OK;
+  }
+
+  return DoOnMessageAvailable(aMsg, true);
+}
+
+NS_IMETHODIMP
+WebSocketImpl::OnStart(nsISupports* aContext)
+{
+  AssertIsOnTargetThread();
+
+  if (mDisconnectingOrDisconnected) {
+    return NS_OK;
+  }
+
+  int16_t readyState = mWebSocket->ReadyState();
+
+  // This is the only function that sets OPEN, and should be called only once
+  MOZ_ASSERT(readyState != WebSocket::OPEN,
+             "readyState already OPEN! OnStart called twice?");
+
+  // Nothing to do if we've already closed/closing
+  if (readyState != WebSocket::CONNECTING) {
+    return NS_OK;
+  }
+
+  // Attempt to kill "ghost" websocket: but usually too early for check to fail
+  nsresult rv = mWebSocket->CheckInnerWindowCorrectness();
+  if (NS_FAILED(rv)) {
+    CloseConnection(nsIWebSocketChannel::CLOSE_GOING_AWAY);
+    return rv;
+  }
+
+  if (!mRequestedProtocolList.IsEmpty()) {
+    mChannel->GetProtocol(mWebSocket->mEstablishedProtocol);
+  }
+
+  mChannel->GetExtensions(mWebSocket->mEstablishedExtensions);
+  UpdateURI();
+
+  mWebSocket->SetReadyState(WebSocket::OPEN);
+
+  mService->WebSocketOpened(mChannel->Serial(),mInnerWindowID,
+                            mWebSocket->mEffectiveURL,
+                            mWebSocket->mEstablishedProtocol,
+                            mWebSocket->mEstablishedExtensions);
+
+  // Let's keep the object alive because the webSocket can be CCed in the
+  // onopen callback.
+  RefPtr<WebSocket> webSocket = mWebSocket;
+
+  // Call 'onopen'
+  rv = webSocket->CreateAndDispatchSimpleEvent(NS_LITERAL_STRING("open"));
+  if (NS_FAILED(rv)) {
+    NS_WARNING("Failed to dispatch the open event");
+  }
+
+  webSocket->UpdateMustKeepAlive();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::OnStop(nsISupports* aContext, nsresult aStatusCode)
+{
+  AssertIsOnTargetThread();
+
+  if (mDisconnectingOrDisconnected) {
+    return NS_OK;
+  }
+
+  // We can be CONNECTING here if connection failed.
+  // We can be OPEN if we have encountered a fatal protocol error
+  // We can be CLOSING if close() was called and/or server initiated close.
+  MOZ_ASSERT(mWebSocket->ReadyState() != WebSocket::CLOSED,
+             "Shouldn't already be CLOSED when OnStop called");
+
+  return ScheduleConnectionCloseEvents(aContext, aStatusCode);
+}
+
+nsresult
+WebSocketImpl::ScheduleConnectionCloseEvents(nsISupports* aContext,
+                                             nsresult aStatusCode)
+{
+  AssertIsOnTargetThread();
+
+  // no-op if some other code has already initiated close event
+  if (!mOnCloseScheduled) {
+    mCloseEventWasClean = NS_SUCCEEDED(aStatusCode);
+
+    if (aStatusCode == NS_BASE_STREAM_CLOSED) {
+      // don't generate an error event just because of an unclean close
+      aStatusCode = NS_OK;
+    }
+
+    if (NS_FAILED(aStatusCode)) {
+      ConsoleError();
+      mFailed = true;
+    }
+
+    mOnCloseScheduled = true;
+
+    NS_DispatchToCurrentThread(new CallDispatchConnectionCloseEvents(this));
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::OnAcknowledge(nsISupports *aContext, uint32_t aSize)
+{
+  AssertIsOnTargetThread();
+
+  if (mDisconnectingOrDisconnected) {
+    return NS_OK;
+  }
+
+  if (aSize > mWebSocket->mOutgoingBufferedAmount) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  mWebSocket->mOutgoingBufferedAmount -= aSize;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::OnServerClose(nsISupports *aContext, uint16_t aCode,
+                             const nsACString &aReason)
+{
+  AssertIsOnTargetThread();
+
+  if (mDisconnectingOrDisconnected) {
+    return NS_OK;
+  }
+
+  int16_t readyState = mWebSocket->ReadyState();
+
+  MOZ_ASSERT(readyState != WebSocket::CONNECTING,
+             "Received server close before connected?");
+  MOZ_ASSERT(readyState != WebSocket::CLOSED,
+             "Received server close after already closed!");
+
+  // store code/string for onclose DOM event
+  mCloseEventCode = aCode;
+  CopyUTF8toUTF16(aReason, mCloseEventReason);
+
+  if (readyState == WebSocket::OPEN) {
+    // Server initiating close.
+    // RFC 6455, 5.5.1: "When sending a Close frame in response, the endpoint
+    // typically echos the status code it received".
+    // But never send certain codes, per section 7.4.1
+    if (aCode == 1005 || aCode == 1006 || aCode == 1015) {
+      CloseConnection(0, EmptyCString());
+    } else {
+      CloseConnection(aCode, aReason);
+    }
+  } else {
+    // We initiated close, and server has replied: OnStop does rest of the work.
+    MOZ_ASSERT(readyState == WebSocket::CLOSING, "unknown state");
+  }
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// WebSocketImpl::nsIInterfaceRequestor
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+WebSocketImpl::GetInterface(const nsIID& aIID, void** aResult)
+{
+  AssertIsOnMainThread();
+
+  if (!mWebSocket || mWebSocket->ReadyState() == WebSocket::CLOSED) {
+    return NS_ERROR_FAILURE;
+  }
+
+  if (aIID.Equals(NS_GET_IID(nsIAuthPrompt)) ||
+      aIID.Equals(NS_GET_IID(nsIAuthPrompt2))) {
+    nsCOMPtr<nsPIDOMWindowInner> win = mWebSocket->GetWindowIfCurrent();
+    if (!win) {
+      return NS_ERROR_NOT_AVAILABLE;
+    }
+
+    nsresult rv;
+    nsCOMPtr<nsIPromptFactory> wwatch =
+      do_GetService(NS_WINDOWWATCHER_CONTRACTID, &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsPIDOMWindowOuter> outerWindow = win->GetOuterWindow();
+    return wwatch->GetPrompt(outerWindow, aIID, aResult);
+  }
+
+  return QueryInterface(aIID, aResult);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// WebSocket
+////////////////////////////////////////////////////////////////////////////////
+
+WebSocket::WebSocket(nsPIDOMWindowInner* aOwnerWindow)
+  : DOMEventTargetHelper(aOwnerWindow)
+  , mIsMainThread(true)
+  , mKeepingAlive(false)
+  , mCheckMustKeepAlive(true)
+  , mOutgoingBufferedAmount(0)
+  , mBinaryType(dom::BinaryType::Blob)
+  , mMutex("WebSocket::mMutex")
+  , mReadyState(CONNECTING)
+{
+  mImpl = new WebSocketImpl(this);
+  mIsMainThread = mImpl->mIsMainThread;
+}
+
+WebSocket::~WebSocket()
+{
+}
+
+JSObject*
+WebSocket::WrapObject(JSContext* cx, JS::Handle<JSObject*> aGivenProto)
+{
+  return WebSocketBinding::Wrap(cx, this, aGivenProto);
+}
+
+//---------------------------------------------------------------------------
+// WebIDL
+//---------------------------------------------------------------------------
+
+// Constructor:
+already_AddRefed<WebSocket>
+WebSocket::Constructor(const GlobalObject& aGlobal,
+                       const nsAString& aUrl,
+                       ErrorResult& aRv)
+{
+  Sequence<nsString> protocols;
+  return WebSocket::ConstructorCommon(aGlobal, aUrl, protocols, nullptr,
+                                      EmptyCString(), aRv);
+}
+
+already_AddRefed<WebSocket>
+WebSocket::Constructor(const GlobalObject& aGlobal,
+                       const nsAString& aUrl,
+                       const nsAString& aProtocol,
+                       ErrorResult& aRv)
+{
+  Sequence<nsString> protocols;
+  if (!protocols.AppendElement(aProtocol, fallible)) {
+    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+    return nullptr;
+  }
+
+  return WebSocket::ConstructorCommon(aGlobal, aUrl, protocols, nullptr,
+                                      EmptyCString(), aRv);
+}
+
+already_AddRefed<WebSocket>
+WebSocket::Constructor(const GlobalObject& aGlobal,
+                       const nsAString& aUrl,
+                       const Sequence<nsString>& aProtocols,
+                       ErrorResult& aRv)
+{
+  return WebSocket::ConstructorCommon(aGlobal, aUrl, aProtocols, nullptr,
+                                      EmptyCString(), aRv);
+}
+
+already_AddRefed<WebSocket>
+WebSocket::CreateServerWebSocket(const GlobalObject& aGlobal,
+                                 const nsAString& aUrl,
+                                 const Sequence<nsString>& aProtocols,
+                                 nsITransportProvider* aTransportProvider,
+                                 const nsAString& aNegotiatedExtensions,
+                                 ErrorResult& aRv)
+{
+  return WebSocket::ConstructorCommon(aGlobal, aUrl, aProtocols, aTransportProvider,
+                                      NS_ConvertUTF16toUTF8(aNegotiatedExtensions), aRv);
+}
+
+namespace {
+
+// This class is used to clear any exception.
+class MOZ_STACK_CLASS ClearException
+{
+public:
+  explicit ClearException(JSContext* aCx)
+    : mCx(aCx)
+  {
+  }
+
+  ~ClearException()
+  {
+    JS_ClearPendingException(mCx);
+  }
+
+private:
+  JSContext* mCx;
+};
+
+class WebSocketMainThreadRunnable : public WorkerMainThreadRunnable
+{
+public:
+  WebSocketMainThreadRunnable(WorkerPrivate* aWorkerPrivate,
+                              const nsACString& aTelemetryKey)
+    : WorkerMainThreadRunnable(aWorkerPrivate, aTelemetryKey)
+  {
+    MOZ_ASSERT(aWorkerPrivate);
+    aWorkerPrivate->AssertIsOnWorkerThread();
+  }
+
+  bool MainThreadRun() override
+  {
+    AssertIsOnMainThread();
+
+    // Walk up to our containing page
+    WorkerPrivate* wp = mWorkerPrivate;
+    while (wp->GetParent()) {
+      wp = wp->GetParent();
+    }
+
+    nsPIDOMWindowInner* window = wp->GetWindow();
+    if (window) {
+      return InitWithWindow(window);
+    }
+
+    return InitWindowless(wp);
+  }
+
+protected:
+  virtual bool InitWithWindow(nsPIDOMWindowInner* aWindow) = 0;
+
+  virtual bool InitWindowless(WorkerPrivate* aTopLevelWorkerPrivate) = 0;
+};
+
+class InitRunnable final : public WebSocketMainThreadRunnable
+{
+public:
+  InitRunnable(WebSocketImpl* aImpl, bool aIsServerSide,
+               const nsAString& aURL,
+               nsTArray<nsString>& aProtocolArray,
+               const nsACString& aScriptFile, uint32_t aScriptLine,
+               uint32_t aScriptColumn,
+               ErrorResult& aRv, bool* aConnectionFailed)
+    : WebSocketMainThreadRunnable(aImpl->mWorkerPrivate,
+                                  NS_LITERAL_CSTRING("WebSocket :: init"))
+    , mImpl(aImpl)
+    , mIsServerSide(aIsServerSide)
+    , mURL(aURL)
+    , mProtocolArray(aProtocolArray)
+    , mScriptFile(aScriptFile)
+    , mScriptLine(aScriptLine)
+    , mScriptColumn(aScriptColumn)
+    , mRv(aRv)
+    , mConnectionFailed(aConnectionFailed)
+  {
+    MOZ_ASSERT(mWorkerPrivate);
+    mWorkerPrivate->AssertIsOnWorkerThread();
+  }
+
+protected:
+  virtual bool InitWithWindow(nsPIDOMWindowInner* aWindow) override
+  {
+    AutoJSAPI jsapi;
+    if (NS_WARN_IF(!jsapi.Init(aWindow))) {
+      mRv.Throw(NS_ERROR_FAILURE);
+      return true;
+    }
+
+    ClearException ce(jsapi.cx());
+
+    nsIDocument* doc = aWindow->GetExtantDoc();
+    if (!doc) {
+      mRv.Throw(NS_ERROR_FAILURE);
+      return true;
+    }
+
+    nsCOMPtr<nsIPrincipal> principal = doc->NodePrincipal();
+    if (!principal) {
+      mRv.Throw(NS_ERROR_FAILURE);
+      return true;
+    }
+
+    mImpl->Init(jsapi.cx(), principal, mIsServerSide, mURL, mProtocolArray,
+                mScriptFile, mScriptLine, mScriptColumn, mRv,
+                mConnectionFailed);
+    return true;
+  }
+
+  virtual bool InitWindowless(WorkerPrivate* aTopLevelWorkerPrivate) override
+  {
+    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_ASSERT(aTopLevelWorkerPrivate && !aTopLevelWorkerPrivate->GetWindow());
+
+    mImpl->Init(nullptr, aTopLevelWorkerPrivate->GetPrincipal(), mIsServerSide,
+                mURL, mProtocolArray, mScriptFile, mScriptLine, mScriptColumn,
+                mRv, mConnectionFailed);
+    return true;
+  }
+
+  // Raw pointer. This worker runs synchronously.
+  WebSocketImpl* mImpl;
+
+  bool mIsServerSide;
+  const nsAString& mURL;
+  nsTArray<nsString>& mProtocolArray;
+  nsCString mScriptFile;
+  uint32_t mScriptLine;
+  uint32_t mScriptColumn;
+  ErrorResult& mRv;
+  bool* mConnectionFailed;
+};
+
+class AsyncOpenRunnable final : public WebSocketMainThreadRunnable
+{
+public:
+  AsyncOpenRunnable(WebSocketImpl* aImpl, ErrorResult& aRv)
+    : WebSocketMainThreadRunnable(aImpl->mWorkerPrivate,
+                                  NS_LITERAL_CSTRING("WebSocket :: AsyncOpen"))
+    , mImpl(aImpl)
+    , mRv(aRv)
+  {
+    MOZ_ASSERT(mWorkerPrivate);
+    mWorkerPrivate->AssertIsOnWorkerThread();
+  }
+
+protected:
+  virtual bool InitWithWindow(nsPIDOMWindowInner* aWindow) override
+  {
+    AssertIsOnMainThread();
+    MOZ_ASSERT(aWindow);
+
+    nsIDocument* doc = aWindow->GetExtantDoc();
+    if (!doc) {
+      mRv.Throw(NS_ERROR_FAILURE);
+      return true;
+    }
+
+    nsCOMPtr<nsIPrincipal> principal = doc->NodePrincipal();
+    if (!principal) {
+      mRv.Throw(NS_ERROR_FAILURE);
+      return true;
+    }
+
+    uint64_t windowID = 0;
+    nsCOMPtr<nsPIDOMWindowOuter> topWindow = aWindow->GetScriptableTop();
+    nsCOMPtr<nsPIDOMWindowInner> topInner;
+    if (topWindow) {
+      topInner = topWindow->GetCurrentInnerWindow();
+    }
+
+    if (topInner) {
+      windowID = topInner->WindowID();
+    }
+
+    mImpl->AsyncOpen(principal, windowID, nullptr, EmptyCString(), mRv);
+    return true;
+  }
+
+  virtual bool InitWindowless(WorkerPrivate* aTopLevelWorkerPrivate) override
+  {
+    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_ASSERT(aTopLevelWorkerPrivate && !aTopLevelWorkerPrivate->GetWindow());
+
+    mImpl->AsyncOpen(aTopLevelWorkerPrivate->GetPrincipal(), 0, nullptr,
+                     EmptyCString(), mRv);
+    return true;
+  }
+
+private:
+  // Raw pointer. This worker runs synchronously.
+  WebSocketImpl* mImpl;
+
+  ErrorResult& mRv;
+};
+
+} // namespace
+
+already_AddRefed<WebSocket>
+WebSocket::ConstructorCommon(const GlobalObject& aGlobal,
+                             const nsAString& aUrl,
+                             const Sequence<nsString>& aProtocols,
+                             nsITransportProvider* aTransportProvider,
+                             const nsACString& aNegotiatedExtensions,
+                             ErrorResult& aRv)
+{
+  MOZ_ASSERT_IF(!aTransportProvider, aNegotiatedExtensions.IsEmpty());
+  nsCOMPtr<nsIPrincipal> principal;
+  nsCOMPtr<nsPIDOMWindowInner> ownerWindow;
+
+  if (NS_IsMainThread()) {
+    nsCOMPtr<nsIScriptObjectPrincipal> scriptPrincipal =
+      do_QueryInterface(aGlobal.GetAsSupports());
+    if (!scriptPrincipal) {
+      aRv.Throw(NS_ERROR_FAILURE);
+      return nullptr;
+    }
+
+    principal = scriptPrincipal->GetPrincipal();
+    if (!principal) {
+      aRv.Throw(NS_ERROR_FAILURE);
+      return nullptr;
+    }
+
+    nsCOMPtr<nsIScriptGlobalObject> sgo =
+      do_QueryInterface(aGlobal.GetAsSupports());
+    if (!sgo) {
+      aRv.Throw(NS_ERROR_FAILURE);
+      return nullptr;
+    }
+
+    ownerWindow = do_QueryInterface(aGlobal.GetAsSupports());
+    if (!ownerWindow) {
+      aRv.Throw(NS_ERROR_FAILURE);
+      return nullptr;
+    }
+  }
+
+  MOZ_ASSERT_IF(ownerWindow, ownerWindow->IsInnerWindow());
+
+  nsTArray<nsString> protocolArray;
+
+  for (uint32_t index = 0, len = aProtocols.Length(); index < len; ++index) {
+
+    const nsString& protocolElement = aProtocols[index];
+
+    if (protocolElement.IsEmpty()) {
+      aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
+      return nullptr;
+    }
+    if (protocolArray.Contains(protocolElement)) {
+      aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
+      return nullptr;
+    }
+    if (protocolElement.FindChar(',') != -1)  /* interferes w/list */ {
+      aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
+      return nullptr;
+    }
+
+    protocolArray.AppendElement(protocolElement);
+  }
+
+  RefPtr<WebSocket> webSocket = new WebSocket(ownerWindow);
+  RefPtr<WebSocketImpl> webSocketImpl = webSocket->mImpl;
+
+  bool connectionFailed = true;
+
+  if (NS_IsMainThread()) {
+    webSocketImpl->Init(aGlobal.Context(), principal, !!aTransportProvider,
+                        aUrl, protocolArray, EmptyCString(),
+                        0, 0, aRv, &connectionFailed);
+  } else {
+    // In workers we have to keep the worker alive using a workerHolder in order
+    // to dispatch messages correctly.
+    if (!webSocketImpl->RegisterWorkerHolder()) {
+      aRv.Throw(NS_ERROR_FAILURE);
+      return nullptr;
+    }
+
+    unsigned lineno, column;
+    JS::AutoFilename file;
+    if (!JS::DescribeScriptedCaller(aGlobal.Context(), &file, &lineno,
+                                    &column)) {
+      NS_WARNING("Failed to get line number and filename in workers.");
+    }
+
+    RefPtr<InitRunnable> runnable =
+      new InitRunnable(webSocketImpl, !!aTransportProvider, aUrl,
+                       protocolArray, nsDependentCString(file.get()), lineno,
+                       column, aRv, &connectionFailed);
+    runnable->Dispatch(aRv);
+  }
+
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  // It can be that we have been already disconnected because the WebSocket is
+  // gone away while we where initializing the webSocket.
+  if (!webSocket->mImpl) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  // We don't return an error if the connection just failed. Instead we dispatch
+  // an event.
+  if (connectionFailed) {
+    webSocket->mImpl->FailConnection(nsIWebSocketChannel::CLOSE_ABNORMAL);
+  }
+
+  // If we don't have a channel, the connection is failed and onerror() will be
+  // called asynchrounsly.
+  if (!webSocket->mImpl->mChannel) {
+    return webSocket.forget();
+  }
+
+  class MOZ_STACK_CLASS ClearWebSocket
+  {
+  public:
+    explicit ClearWebSocket(WebSocketImpl* aWebSocketImpl)
+      : mWebSocketImpl(aWebSocketImpl)
+      , mDone(false)
+    {
+    }
+
+    void Done()
+    {
+       mDone = true;
+    }
+
+    ~ClearWebSocket()
+    {
+      if (!mDone) {
+        mWebSocketImpl->mChannel = nullptr;
+        mWebSocketImpl->FailConnection(nsIWebSocketChannel::CLOSE_ABNORMAL);
+      }
+    }
+
+    WebSocketImpl* mWebSocketImpl;
+    bool mDone;
+  };
+
+  ClearWebSocket cws(webSocket->mImpl);
+
+  // This operation must be done on the correct thread. The rest must run on the
+  // main-thread.
+  aRv = webSocket->mImpl->mChannel->SetNotificationCallbacks(webSocket->mImpl);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  if (NS_IsMainThread()) {
+    MOZ_ASSERT(principal);
+
+    nsPIDOMWindowOuter* outerWindow = ownerWindow->GetOuterWindow();
+
+    uint64_t windowID = 0;
+    nsCOMPtr<nsPIDOMWindowOuter> topWindow = outerWindow->GetScriptableTop();
+    nsCOMPtr<nsPIDOMWindowInner> topInner;
+    if (topWindow) {
+      topInner = topWindow->GetCurrentInnerWindow();
+    }
+
+    if (topInner) {
+      windowID = topInner->WindowID();
+    }
+
+    webSocket->mImpl->AsyncOpen(principal, windowID, aTransportProvider,
+                                aNegotiatedExtensions, aRv);
+  } else {
+    MOZ_ASSERT(!aTransportProvider && aNegotiatedExtensions.IsEmpty(),
+               "not yet implemented");
+    RefPtr<AsyncOpenRunnable> runnable =
+      new AsyncOpenRunnable(webSocket->mImpl, aRv);
+    runnable->Dispatch(aRv);
+  }
+
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  // It can be that we have been already disconnected because the WebSocket is
+  // gone away while we where initializing the webSocket.
+  if (!webSocket->mImpl) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return nullptr;
+  }
+
+  // Let's inform devtools about this new active WebSocket.
+  webSocket->mImpl->mService->WebSocketCreated(webSocket->mImpl->mChannel->Serial(),
+                                               webSocket->mImpl->mInnerWindowID,
+                                               webSocket->mURI,
+                                               webSocket->mImpl->mRequestedProtocolList);
+
+  cws.Done();
+  return webSocket.forget();
+}
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(WebSocket)
+
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(WebSocket)
+  bool isBlack = tmp->IsBlack();
+  if (isBlack || tmp->mKeepingAlive) {
+    if (tmp->mListenerManager) {
+      tmp->mListenerManager->MarkForCC();
+    }
+    if (!isBlack && tmp->PreservingWrapper()) {
+      // This marks the wrapper black.
+      tmp->GetWrapper();
+    }
+    return true;
+  }
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
+
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(WebSocket)
+  return tmp->IsBlack();
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
+
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(WebSocket)
+  return tmp->IsBlack();
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(WebSocket,
+                                               DOMEventTargetHelper)
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(WebSocket,
+                                                  DOMEventTargetHelper)
+  if (tmp->mImpl) {
+    NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mImpl->mChannel)
+  }
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(WebSocket,
+                                                DOMEventTargetHelper)
+  if (tmp->mImpl) {
+    NS_IMPL_CYCLE_COLLECTION_UNLINK(mImpl->mChannel)
+    tmp->mImpl->Disconnect();
+    MOZ_ASSERT(!tmp->mImpl);
+  }
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(WebSocket)
+NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
+
+NS_IMPL_ADDREF_INHERITED(WebSocket, DOMEventTargetHelper)
+NS_IMPL_RELEASE_INHERITED(WebSocket, DOMEventTargetHelper)
+
+void
+WebSocket::DisconnectFromOwner()
+{
+  AssertIsOnMainThread();
+  DOMEventTargetHelper::DisconnectFromOwner();
+
+  if (mImpl) {
+    mImpl->CloseConnection(nsIWebSocketChannel::CLOSE_GOING_AWAY);
+  }
+
+  DontKeepAliveAnyMore();
+}
+
+//-----------------------------------------------------------------------------
+// WebSocketImpl:: initialization
+//-----------------------------------------------------------------------------
+
+void
+WebSocketImpl::Init(JSContext* aCx,
+                    nsIPrincipal* aPrincipal,
+                    bool aIsServerSide,
+                    const nsAString& aURL,
+                    nsTArray<nsString>& aProtocolArray,
+                    const nsACString& aScriptFile,
+                    uint32_t aScriptLine,
+                    uint32_t aScriptColumn,
+                    ErrorResult& aRv,
+                    bool* aConnectionFailed)
+{
+  AssertIsOnMainThread();
+  MOZ_ASSERT(aPrincipal);
+
+  mService = WebSocketEventService::GetOrCreate();
+
+  // We need to keep the implementation alive in case the init disconnects it
+  // because of some error.
+  RefPtr<WebSocketImpl> kungfuDeathGrip = this;
+
+  // Attempt to kill "ghost" websocket: but usually too early for check to fail
+  aRv = mWebSocket->CheckInnerWindowCorrectness();
+  if (NS_WARN_IF(aRv.Failed())) {
+    return;
+  }
+
+  // Shut down websocket if window is frozen or destroyed (only needed for
+  // "ghost" websockets--see bug 696085)
+  if (!mWorkerPrivate) {
+    nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
+    if (NS_WARN_IF(!os)) {
+      aRv.Throw(NS_ERROR_FAILURE);
+      return;
+    }
+
+    aRv = os->AddObserver(this, DOM_WINDOW_DESTROYED_TOPIC, true);
+    if (NS_WARN_IF(aRv.Failed())) {
+      return;
+    }
+
+    aRv = os->AddObserver(this, DOM_WINDOW_FROZEN_TOPIC, true);
+    if (NS_WARN_IF(aRv.Failed())) {
+      return;
+    }
+  }
+
+  if (mWorkerPrivate) {
+    mScriptFile = aScriptFile;
+    mScriptLine = aScriptLine;
+    mScriptColumn = aScriptColumn;
+  } else {
+    MOZ_ASSERT(aCx);
+
+    unsigned lineno, column;
+    JS::AutoFilename file;
+    if (JS::DescribeScriptedCaller(aCx, &file, &lineno, &column)) {
+      mScriptFile = file.get();
+      mScriptLine = lineno;
+      mScriptColumn = column;
+    }
+  }
+
+  mIsServerSide = aIsServerSide;
+
+  // If we don't have aCx, we are window-less, so we don't have a
+  // inner-windowID. This can happen in sharedWorkers and ServiceWorkers or in
+  // DedicateWorkers created by JSM.
+  if (aCx) {
+    mInnerWindowID = nsJSUtils::GetCurrentlyRunningCodeInnerWindowID(aCx);
+  }
+
+  // parses the url
+  aRv = ParseURL(PromiseFlatString(aURL));
+  if (NS_WARN_IF(aRv.Failed())) {
+    return;
+  }
+
+  nsCOMPtr<nsIDocument> originDoc = mWebSocket->GetDocumentIfCurrent();
+  if (!originDoc) {
+    nsresult rv = mWebSocket->CheckInnerWindowCorrectness();
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      aRv.Throw(rv);
+      return;
+    }
+  }
+  mOriginDocument = do_GetWeakReference(originDoc);
+
+  if (!mIsServerSide) {
+    nsCOMPtr<nsIURI> uri;
+    {
+      nsresult rv = NS_NewURI(getter_AddRefs(uri), mURI);
+
+      // We crash here because we are sure that mURI is a valid URI, so either we
+      // are OOM'ing or something else bad is happening.
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        MOZ_CRASH();
+      }
+    }
+
+    // The 'real' nsHttpChannel of the websocket gets opened in the parent.
+    // Since we don't serialize the CSP within child and parent and also not
+    // the context, we have to perform content policy checks here instead of
+    // AsyncOpen2().
+    // Please note that websockets can't follow redirects, hence there is no
+    // need to perform a CSP check after redirects.
+    int16_t shouldLoad = nsIContentPolicy::ACCEPT;
+    aRv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_WEBSOCKET,
+                                    uri,
+                                    aPrincipal,
+                                    originDoc,
+                                    EmptyCString(),
+                                    nullptr,
+                                    &shouldLoad,
+                                    nsContentUtils::GetContentPolicy(),
+                                    nsContentUtils::GetSecurityManager());
+
+    if (NS_WARN_IF(aRv.Failed())) {
+      return;
+    }
+
+    if (NS_CP_REJECTED(shouldLoad)) {
+      // Disallowed by content policy
+      aRv.Throw(NS_ERROR_CONTENT_BLOCKED);
+      return;
+    }
+  }
+
+  // Potentially the page uses the CSP directive 'upgrade-insecure-requests'.
+  // In such a case we have to upgrade ws: to wss: and also update mSecure
+  // to reflect that upgrade. Please note that we can not upgrade from ws:
+  // to wss: before performing content policy checks because CSP needs to
+  // send reports in case the scheme is about to be upgraded.
+  if (!mIsServerSide && !mSecure && originDoc &&
+      originDoc->GetUpgradeInsecureRequests(false)) {
+    // let's use the old specification before the upgrade for logging
+    NS_ConvertUTF8toUTF16 reportSpec(mURI);
+
+    // upgrade the request from ws:// to wss:// and mark as secure
+    mURI.ReplaceSubstring("ws://", "wss://");
+    if (NS_WARN_IF(mURI.Find("wss://") != 0)) {
+      return;
+    }
+    mSecure = true;
+
+    const char16_t* params[] = { reportSpec.get(), u"wss" };
+    CSP_LogLocalizedStr(u"upgradeInsecureRequest",
+                        params, ArrayLength(params),
+                        EmptyString(), // aSourceFile
+                        EmptyString(), // aScriptSample
+                        0, // aLineNumber
+                        0, // aColumnNumber
+                        nsIScriptError::warningFlag, "CSP",
+                        mInnerWindowID);
+  }
+
+  // Don't allow https:// to open ws://
+  if (!mIsServerSide && !mSecure &&
+      !Preferences::GetBool("network.websocket.allowInsecureFromHTTPS",
+                            false)) {
+    // Confirmed we are opening plain ws:// and want to prevent this from a
+    // secure context (e.g. https).
+    nsCOMPtr<nsIPrincipal> principal;
+    nsCOMPtr<nsIURI> originURI;
+    if (mWorkerPrivate) {
+      // For workers, retrieve the URI from the WorkerPrivate
+      principal = mWorkerPrivate->GetPrincipal();
+    } else {
+      // Check the principal's uri to determine if we were loaded from https.
+      nsCOMPtr<nsIGlobalObject> globalObject(GetEntryGlobal());
+      if (globalObject) {
+        principal = globalObject->PrincipalOrNull();
+      }
+
+      nsCOMPtr<nsPIDOMWindowInner> innerWindow;
+
+      while (true) {
+        if (principal && !principal->GetIsNullPrincipal()) {
+          break;
+        }
+
+        if (!innerWindow) {
+          innerWindow = do_QueryInterface(globalObject);
+          if (!innerWindow) {
+            // If we are in a XPConnect sandbox or in a JS component,
+            // innerWindow will be null. There is nothing on top of this to be
+            // considered.
+            break;
+          }
+        }
+
+        nsCOMPtr<nsPIDOMWindowOuter> parentWindow =
+          innerWindow->GetScriptableParent();
+        if (NS_WARN_IF(!parentWindow)) {
+          aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+          return;
+        }
+
+        nsCOMPtr<nsPIDOMWindowInner> currentInnerWindow =
+          parentWindow->GetCurrentInnerWindow();
+        if (NS_WARN_IF(!currentInnerWindow)) {
+          aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+          return;
+        }
+
+        // We are at the top. Let's see if we have an opener window.
+        if (innerWindow == currentInnerWindow) {
+          ErrorResult error;
+          parentWindow =
+            nsGlobalWindow::Cast(innerWindow)->GetOpenerWindow(error);
+          if (NS_WARN_IF(error.Failed())) {
+            error.SuppressException();
+            aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+            return;
+          }
+
+          if (!parentWindow) {
+            break;
+          }
+
+          currentInnerWindow = parentWindow->GetCurrentInnerWindow();
+          if (NS_WARN_IF(!currentInnerWindow)) {
+            aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+            return;
+          }
+
+          MOZ_ASSERT(currentInnerWindow != innerWindow);
+        }
+
+        innerWindow = currentInnerWindow;
+
+        nsCOMPtr<nsIDocument> document = innerWindow->GetExtantDoc();
+        if (NS_WARN_IF(!document)) {
+          aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+          return;
+        }
+
+        principal = document->NodePrincipal();
+      }
+    }
+
+    if (principal) {
+      principal->GetURI(getter_AddRefs(originURI));
+    }
+
+    if (originURI) {
+      bool originIsHttps = false;
+      aRv = originURI->SchemeIs("https", &originIsHttps);
+      if (NS_WARN_IF(aRv.Failed())) {
+        return;
+      }
+      if (originIsHttps) {
+        aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+        return;
+      }
+    }
+  }
+
+  // Assign the sub protocol list and scan it for illegal values
+  for (uint32_t index = 0; index < aProtocolArray.Length(); ++index) {
+    for (uint32_t i = 0; i < aProtocolArray[index].Length(); ++i) {
+      if (aProtocolArray[index][i] < static_cast<char16_t>(0x0021) ||
+          aProtocolArray[index][i] > static_cast<char16_t>(0x007E)) {
+        aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
+        return;
+      }
+    }
+
+    if (!mRequestedProtocolList.IsEmpty()) {
+      mRequestedProtocolList.AppendLiteral(", ");
+    }
+
+    AppendUTF16toUTF8(aProtocolArray[index], mRequestedProtocolList);
+  }
+
+  // the constructor should throw a SYNTAX_ERROR only if it fails to parse the
+  // url parameter, so don't throw if InitializeConnection fails, and call
+  // onerror/onclose asynchronously
+  if (NS_FAILED(InitializeConnection(aPrincipal))) {
+    *aConnectionFailed = true;
+  } else {
+    *aConnectionFailed = false;
+  }
+}
+
+void
+WebSocketImpl::AsyncOpen(nsIPrincipal* aPrincipal, uint64_t aInnerWindowID,
+                         nsITransportProvider* aTransportProvider,
+                         const nsACString& aNegotiatedExtensions,
+                         ErrorResult& aRv)
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Not running on main thread");
+  MOZ_ASSERT_IF(!aTransportProvider, aNegotiatedExtensions.IsEmpty());
+
+  nsCString asciiOrigin;
+  aRv = nsContentUtils::GetASCIIOrigin(aPrincipal, asciiOrigin);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return;
+  }
+
+  if (aTransportProvider) {
+    aRv = mChannel->SetServerParameters(aTransportProvider, aNegotiatedExtensions);
+    if (NS_WARN_IF(aRv.Failed())) {
+      return;
+    }
+  }
+
+  ToLowerCase(asciiOrigin);
+
+  nsCOMPtr<nsIURI> uri;
+  if (!aTransportProvider) {
+    aRv = NS_NewURI(getter_AddRefs(uri), mURI);
+    MOZ_ASSERT(!aRv.Failed());
+  }
+
+  aRv = mChannel->AsyncOpen(uri, asciiOrigin, aInnerWindowID, this, nullptr);
+  if (NS_WARN_IF(aRv.Failed())) {
+    aRv.Throw(NS_ERROR_CONTENT_BLOCKED);
+    return;
+  }
+
+  mInnerWindowID = aInnerWindowID;
+}
+
+//-----------------------------------------------------------------------------
+// WebSocketImpl methods:
+//-----------------------------------------------------------------------------
+
+class nsAutoCloseWS final
+{
+public:
+  explicit nsAutoCloseWS(WebSocketImpl* aWebSocketImpl)
+    : mWebSocketImpl(aWebSocketImpl)
+  {}
+
+  ~nsAutoCloseWS()
+  {
+    if (!mWebSocketImpl->mChannel) {
+      mWebSocketImpl->CloseConnection(nsIWebSocketChannel::CLOSE_INTERNAL_ERROR);
+    }
+  }
+private:
+  RefPtr<WebSocketImpl> mWebSocketImpl;
+};
+
+nsresult
+WebSocketImpl::InitializeConnection(nsIPrincipal* aPrincipal)
+{
+  AssertIsOnMainThread();
+  MOZ_ASSERT(!mChannel, "mChannel should be null");
+
+  nsCOMPtr<nsIWebSocketChannel> wsChannel;
+  nsAutoCloseWS autoClose(this);
+  nsresult rv;
+
+  if (mSecure) {
+    wsChannel =
+      do_CreateInstance("@mozilla.org/network/protocol;1?name=wss", &rv);
+  } else {
+    wsChannel =
+      do_CreateInstance("@mozilla.org/network/protocol;1?name=ws", &rv);
+  }
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // add ourselves to the document's load group and
+  // provide the http stack the loadgroup info too
+  nsCOMPtr<nsILoadGroup> loadGroup;
+  rv = GetLoadGroup(getter_AddRefs(loadGroup));
+  if (loadGroup) {
+    rv = wsChannel->SetLoadGroup(loadGroup);
+    NS_ENSURE_SUCCESS(rv, rv);
+    rv = loadGroup->AddRequest(this, nullptr);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    mWeakLoadGroup = do_GetWeakReference(loadGroup);
+  }
+
+  // manually adding loadinfo to the channel since it
+  // was not set during channel creation.
+  nsCOMPtr<nsIDocument> doc = do_QueryReferent(mOriginDocument);
+
+  // mOriginDocument has to be release on main-thread because WeakReferences
+  // are not thread-safe.
+  mOriginDocument = nullptr;
+
+
+  // The TriggeringPrincipal for websockets must always be a script.
+  // Let's make sure that the doc's principal (if a doc exists)
+  // and aPrincipal are same origin.
+  MOZ_ASSERT(!doc || doc->NodePrincipal()->Equals(aPrincipal));
+
+  wsChannel->InitLoadInfo(doc ? doc->AsDOMNode() : nullptr,
+                          doc ? doc->NodePrincipal() : aPrincipal,
+                          aPrincipal,
+                          nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
+                          nsIContentPolicy::TYPE_WEBSOCKET);
+
+  if (!mRequestedProtocolList.IsEmpty()) {
+    rv = wsChannel->SetProtocol(mRequestedProtocolList);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  nsCOMPtr<nsIThreadRetargetableRequest> rr = do_QueryInterface(wsChannel);
+  NS_ENSURE_TRUE(rr, NS_ERROR_FAILURE);
+
+  rv = rr->RetargetDeliveryTo(this);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  mChannel = wsChannel;
+
+  return NS_OK;
+}
+
+void
+WebSocketImpl::DispatchConnectionCloseEvents()
+{
+  AssertIsOnTargetThread();
+
+  if (mDisconnectingOrDisconnected) {
+    return;
+  }
+
+  mWebSocket->SetReadyState(WebSocket::CLOSED);
+
+  // Let's keep the object alive because the webSocket can be CCed in the
+  // onerror or in the onclose callback.
+  RefPtr<WebSocket> webSocket = mWebSocket;
+
+  // Call 'onerror' if needed
+  if (mFailed) {
+    nsresult rv =
+      webSocket->CreateAndDispatchSimpleEvent(NS_LITERAL_STRING("error"));
+    if (NS_FAILED(rv)) {
+      NS_WARNING("Failed to dispatch the error event");
+    }
+  }
+
+  nsresult rv = webSocket->CreateAndDispatchCloseEvent(mCloseEventWasClean,
+                                                       mCloseEventCode,
+                                                       mCloseEventReason);
+  if (NS_FAILED(rv)) {
+    NS_WARNING("Failed to dispatch the close event");
+  }
+
+  webSocket->UpdateMustKeepAlive();
+  Disconnect();
+}
+
+nsresult
+WebSocket::CreateAndDispatchSimpleEvent(const nsAString& aName)
+{
+  MOZ_ASSERT(mImpl);
+  AssertIsOnTargetThread();
+
+  nsresult rv = CheckInnerWindowCorrectness();
+  if (NS_FAILED(rv)) {
+    return NS_OK;
+  }
+
+  RefPtr<Event> event = NS_NewDOMEvent(this, nullptr, nullptr);
+
+  // it doesn't bubble, and it isn't cancelable
+  event->InitEvent(aName, false, false);
+  event->SetTrusted(true);
+
+  return DispatchDOMEvent(nullptr, event, nullptr, nullptr);
+}
+
+nsresult
+WebSocket::CreateAndDispatchMessageEvent(const nsACString& aData,
+                                         bool aIsBinary)
+{
+  MOZ_ASSERT(mImpl);
+  AssertIsOnTargetThread();
+
+  AutoJSAPI jsapi;
+
+  if (NS_IsMainThread()) {
+    if (NS_WARN_IF(!jsapi.Init(GetOwner()))) {
+      return NS_ERROR_FAILURE;
+    }
+  } else {
+    MOZ_ASSERT(!mIsMainThread);
+    MOZ_ASSERT(mImpl->mWorkerPrivate);
+    if (NS_WARN_IF(!jsapi.Init(mImpl->mWorkerPrivate->GlobalScope()))) {
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  JSContext* cx = jsapi.cx();
+
+  nsresult rv = CheckInnerWindowCorrectness();
+  if (NS_FAILED(rv)) {
+    return NS_OK;
+  }
+
+  uint16_t messageType = nsIWebSocketEventListener::TYPE_STRING;
+
+  // Create appropriate JS object for message
+  JS::Rooted<JS::Value> jsData(cx);
+  if (aIsBinary) {
+    if (mBinaryType == dom::BinaryType::Blob) {
+      messageType = nsIWebSocketEventListener::TYPE_BLOB;
+
+      RefPtr<Blob> blob =
+        Blob::CreateStringBlob(GetOwner(), aData, EmptyString());
+      MOZ_ASSERT(blob);
+
+      if (!ToJSValue(cx, blob, &jsData)) {
+        return NS_ERROR_FAILURE;
+      }
+
+    } else if (mBinaryType == dom::BinaryType::Arraybuffer) {
+      messageType = nsIWebSocketEventListener::TYPE_ARRAYBUFFER;
+
+      JS::Rooted<JSObject*> arrayBuf(cx);
+      nsresult rv = nsContentUtils::CreateArrayBuffer(cx, aData,
+                                                      arrayBuf.address());
+      NS_ENSURE_SUCCESS(rv, rv);
+      jsData.setObject(*arrayBuf);
+    } else {
+      NS_RUNTIMEABORT("Unknown binary type!");
+      return NS_ERROR_UNEXPECTED;
+    }
+  } else {
+    // JS string
+    NS_ConvertUTF8toUTF16 utf16Data(aData);
+    JSString* jsString;
+    jsString = JS_NewUCStringCopyN(cx, utf16Data.get(), utf16Data.Length());
+    NS_ENSURE_TRUE(jsString, NS_ERROR_FAILURE);
+
+    jsData.setString(jsString);
+  }
+
+  mImpl->mService->WebSocketMessageAvailable(mImpl->mChannel->Serial(),
+                                             mImpl->mInnerWindowID,
+                                             aData, messageType);
+
+  // create an event that uses the MessageEvent interface,
+  // which does not bubble, is not cancelable, and has no default action
+
+  RefPtr<MessageEvent> event = new MessageEvent(this, nullptr, nullptr);
+
+  event->InitMessageEvent(nullptr, NS_LITERAL_STRING("message"), false, false,
+                          jsData, mImpl->mUTF16Origin, EmptyString(), nullptr,
+                          Sequence<OwningNonNull<MessagePort>>());
+  event->SetTrusted(true);
+
+  return DispatchDOMEvent(nullptr, static_cast<Event*>(event), nullptr,
+                          nullptr);
+}
+
+nsresult
+WebSocket::CreateAndDispatchCloseEvent(bool aWasClean,
+                                       uint16_t aCode,
+                                       const nsAString& aReason)
+{
+  AssertIsOnTargetThread();
+
+  // This method is called by a runnable and it can happen that, in the
+  // meantime, GC unlinked this object, so mImpl could be null.
+  if (mImpl && mImpl->mChannel) {
+    mImpl->mService->WebSocketClosed(mImpl->mChannel->Serial(),
+                                     mImpl->mInnerWindowID,
+                                     aWasClean, aCode, aReason);
+  }
+
+  nsresult rv = CheckInnerWindowCorrectness();
+  if (NS_FAILED(rv)) {
+    return NS_OK;
+  }
+
+  CloseEventInit init;
+  init.mBubbles = false;
+  init.mCancelable = false;
+  init.mWasClean = aWasClean;
+  init.mCode = aCode;
+  init.mReason = aReason;
+
+  RefPtr<CloseEvent> event =
+    CloseEvent::Constructor(this, NS_LITERAL_STRING("close"), init);
+  event->SetTrusted(true);
+
+  return DispatchDOMEvent(nullptr, event, nullptr, nullptr);
+}
+
+nsresult
+WebSocketImpl::ParseURL(const nsAString& aURL)
+{
+  AssertIsOnMainThread();
+  NS_ENSURE_TRUE(!aURL.IsEmpty(), NS_ERROR_DOM_SYNTAX_ERR);
+
+  if (mIsServerSide) {
+    mWebSocket->mURI = aURL;
+    CopyUTF16toUTF8(mWebSocket->mURI, mURI);
+
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = NS_NewURI(getter_AddRefs(uri), aURL);
+  NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_SYNTAX_ERR);
+
+  nsCOMPtr<nsIURL> parsedURL = do_QueryInterface(uri, &rv);
+  NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_SYNTAX_ERR);
+
+  bool hasRef;
+  rv = parsedURL->GetHasRef(&hasRef);
+  NS_ENSURE_TRUE(NS_SUCCEEDED(rv) && !hasRef,
+                 NS_ERROR_DOM_SYNTAX_ERR);
+
+  nsAutoCString scheme;
+  rv = parsedURL->GetScheme(scheme);
+  NS_ENSURE_TRUE(NS_SUCCEEDED(rv) && !scheme.IsEmpty(),
+                 NS_ERROR_DOM_SYNTAX_ERR);
+
+  nsAutoCString host;
+  rv = parsedURL->GetAsciiHost(host);
+  NS_ENSURE_TRUE(NS_SUCCEEDED(rv) && !host.IsEmpty(), NS_ERROR_DOM_SYNTAX_ERR);
+
+  int32_t port;
+  rv = parsedURL->GetPort(&port);
+  NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_SYNTAX_ERR);
+
+  rv = NS_CheckPortSafety(port, scheme.get());
+  NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_SECURITY_ERR);
+
+  nsAutoCString filePath;
+  rv = parsedURL->GetFilePath(filePath);
+  if (filePath.IsEmpty()) {
+    filePath.Assign('/');
+  }
+  NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_SYNTAX_ERR);
+
+  nsAutoCString query;
+  rv = parsedURL->GetQuery(query);
+  NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_SYNTAX_ERR);
+
+  if (scheme.LowerCaseEqualsLiteral("ws")) {
+     mSecure = false;
+     mPort = (port == -1) ? DEFAULT_WS_SCHEME_PORT : port;
+  } else if (scheme.LowerCaseEqualsLiteral("wss")) {
+    mSecure = true;
+    mPort = (port == -1) ? DEFAULT_WSS_SCHEME_PORT : port;
+  } else {
+    return NS_ERROR_DOM_SYNTAX_ERR;
+  }
+
+  rv = nsContentUtils::GetUTFOrigin(parsedURL, mUTF16Origin);
+  NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_SYNTAX_ERR);
+
+  mAsciiHost = host;
+  ToLowerCase(mAsciiHost);
+
+  mResource = filePath;
+  if (!query.IsEmpty()) {
+    mResource.Append('?');
+    mResource.Append(query);
+  }
+  uint32_t length = mResource.Length();
+  uint32_t i;
+  for (i = 0; i < length; ++i) {
+    if (mResource[i] < static_cast<char16_t>(0x0021) ||
+        mResource[i] > static_cast<char16_t>(0x007E)) {
+      return NS_ERROR_DOM_SYNTAX_ERR;
+    }
+  }
+
+  rv = parsedURL->GetSpec(mURI);
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
+
+  CopyUTF8toUTF16(mURI, mWebSocket->mURI);
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// Methods that keep alive the WebSocket object when:
+//   1. the object has registered event listeners that can be triggered
+//      ("strong event listeners");
+//   2. there are outgoing not sent messages.
+//-----------------------------------------------------------------------------
+
+void
+WebSocket::UpdateMustKeepAlive()
+{
+  // Here we could not have mImpl.
+  MOZ_ASSERT(NS_IsMainThread() == mIsMainThread);
+
+  if (!mCheckMustKeepAlive || !mImpl) {
+    return;
+  }
+
+  bool shouldKeepAlive = false;
+  uint16_t readyState = ReadyState();
+
+  if (mListenerManager) {
+    switch (readyState)
+    {
+      case CONNECTING:
+      {
+        if (mListenerManager->HasListenersFor(nsGkAtoms::onopen) ||
+            mListenerManager->HasListenersFor(nsGkAtoms::onmessage) ||
+            mListenerManager->HasListenersFor(nsGkAtoms::onerror) ||
+            mListenerManager->HasListenersFor(nsGkAtoms::onclose)) {
+          shouldKeepAlive = true;
+        }
+      }
+      break;
+
+      case OPEN:
+      case CLOSING:
+      {
+        if (mListenerManager->HasListenersFor(nsGkAtoms::onmessage) ||
+            mListenerManager->HasListenersFor(nsGkAtoms::onerror) ||
+            mListenerManager->HasListenersFor(nsGkAtoms::onclose) ||
+            mOutgoingBufferedAmount != 0) {
+          shouldKeepAlive = true;
+        }
+      }
+      break;
+
+      case CLOSED:
+      {
+        shouldKeepAlive = false;
+      }
+    }
+  }
+
+  if (mKeepingAlive && !shouldKeepAlive) {
+    mKeepingAlive = false;
+    mImpl->ReleaseObject();
+  } else if (!mKeepingAlive && shouldKeepAlive) {
+    mKeepingAlive = true;
+    mImpl->AddRefObject();
+  }
+}
+
+void
+WebSocket::DontKeepAliveAnyMore()
+{
+  // Here we could not have mImpl.
+  MOZ_ASSERT(NS_IsMainThread() == mIsMainThread);
+
+  if (mKeepingAlive) {
+    MOZ_ASSERT(mImpl);
+
+    mKeepingAlive = false;
+    mImpl->ReleaseObject();
+  }
+
+  mCheckMustKeepAlive = false;
+}
+
+namespace {
+
+class WebSocketWorkerHolder final : public WorkerHolder
+{
+public:
+  explicit WebSocketWorkerHolder(WebSocketImpl* aWebSocketImpl)
+    : mWebSocketImpl(aWebSocketImpl)
+  {
+  }
+
+  bool Notify(Status aStatus) override
+  {
+    MOZ_ASSERT(aStatus > workers::Running);
+
+    if (aStatus >= Canceling) {
+      {
+        MutexAutoLock lock(mWebSocketImpl->mMutex);
+        mWebSocketImpl->mWorkerShuttingDown = true;
+      }
+
+      mWebSocketImpl->CloseConnection(nsIWebSocketChannel::CLOSE_GOING_AWAY,
+                                      EmptyCString());
+    }
+
+    return true;
+  }
+
+private:
+  WebSocketImpl* mWebSocketImpl;
+};
+
+} // namespace
+
+void
+WebSocketImpl::AddRefObject()
+{
+  AssertIsOnTargetThread();
+  AddRef();
+}
+
+void
+WebSocketImpl::ReleaseObject()
+{
+  AssertIsOnTargetThread();
+  Release();
+}
+
+bool
+WebSocketImpl::RegisterWorkerHolder()
+{
+  mWorkerPrivate->AssertIsOnWorkerThread();
+  MOZ_ASSERT(!mWorkerHolder);
+  mWorkerHolder = new WebSocketWorkerHolder(this);
+
+  if (NS_WARN_IF(!mWorkerHolder->HoldWorker(mWorkerPrivate, Canceling))) {
+    mWorkerHolder = nullptr;
+    return false;
+  }
+
+#ifdef DEBUG
+  SetHasWorkerHolderRegistered(true);
+#endif
+
+  return true;
+}
+
+void
+WebSocketImpl::UnregisterWorkerHolder()
+{
+  MOZ_ASSERT(mDisconnectingOrDisconnected);
+  MOZ_ASSERT(mWorkerPrivate);
+  mWorkerPrivate->AssertIsOnWorkerThread();
+  MOZ_ASSERT(mWorkerHolder);
+
+  {
+    MutexAutoLock lock(mMutex);
+    mWorkerShuttingDown = true;
+  }
+
+  // The DTOR of this WorkerHolder will release the worker for us.
+  mWorkerHolder = nullptr;
+
+  mWorkerPrivate = nullptr;
+
+#ifdef DEBUG
+  SetHasWorkerHolderRegistered(false);
+#endif
+}
+
+nsresult
+WebSocketImpl::UpdateURI()
+{
+  AssertIsOnTargetThread();
+
+  // Check for Redirections
+  RefPtr<BaseWebSocketChannel> channel;
+  channel = static_cast<BaseWebSocketChannel*>(mChannel.get());
+  MOZ_ASSERT(channel);
+
+  channel->GetEffectiveURL(mWebSocket->mEffectiveURL);
+  mSecure = channel->IsEncrypted();
+
+  return NS_OK;
+}
+
+void
+WebSocket::EventListenerAdded(nsIAtom* aType)
+{
+  AssertIsOnMainThread();
+  UpdateMustKeepAlive();
+}
+
+void
+WebSocket::EventListenerRemoved(nsIAtom* aType)
+{
+  AssertIsOnMainThread();
+  UpdateMustKeepAlive();
+}
+
+//-----------------------------------------------------------------------------
+// WebSocket - methods
+//-----------------------------------------------------------------------------
+
+// webIDL: readonly attribute unsigned short readyState;
+uint16_t
+WebSocket::ReadyState()
+{
+  MutexAutoLock lock(mMutex);
+  return mReadyState;
+}
+
+void
+WebSocket::SetReadyState(uint16_t aReadyState)
+{
+  MutexAutoLock lock(mMutex);
+  mReadyState = aReadyState;
+}
+
+// webIDL: readonly attribute unsigned long bufferedAmount;
+uint32_t
+WebSocket::BufferedAmount() const
+{
+  AssertIsOnTargetThread();
+  return mOutgoingBufferedAmount;
+}
+
+// webIDL: attribute BinaryType binaryType;
+dom::BinaryType
+WebSocket::BinaryType() const
+{
+  AssertIsOnTargetThread();
+  return mBinaryType;
+}
+
+// webIDL: attribute BinaryType binaryType;
+void
+WebSocket::SetBinaryType(dom::BinaryType aData)
+{
+  AssertIsOnTargetThread();
+  mBinaryType = aData;
+}
+
+// webIDL: readonly attribute DOMString url
+void
+WebSocket::GetUrl(nsAString& aURL)
+{
+  AssertIsOnTargetThread();
+
+  if (mEffectiveURL.IsEmpty()) {
+    aURL = mURI;
+  } else {
+    aURL = mEffectiveURL;
+  }
+}
+
+// webIDL: readonly attribute DOMString extensions;
+void
+WebSocket::GetExtensions(nsAString& aExtensions)
+{
+  AssertIsOnTargetThread();
+  CopyUTF8toUTF16(mEstablishedExtensions, aExtensions);
+}
+
+// webIDL: readonly attribute DOMString protocol;
+void
+WebSocket::GetProtocol(nsAString& aProtocol)
+{
+  AssertIsOnTargetThread();
+  CopyUTF8toUTF16(mEstablishedProtocol, aProtocol);
+}
+
+// webIDL: void send(DOMString data);
+void
+WebSocket::Send(const nsAString& aData,
+                ErrorResult& aRv)
+{
+  AssertIsOnTargetThread();
+
+  NS_ConvertUTF16toUTF8 msgString(aData);
+  Send(nullptr, msgString, msgString.Length(), false, aRv);
+}
+
+void
+WebSocket::Send(Blob& aData, ErrorResult& aRv)
+{
+  AssertIsOnTargetThread();
+
+  nsCOMPtr<nsIInputStream> msgStream;
+  aData.GetInternalStream(getter_AddRefs(msgStream), aRv);
+  if (NS_WARN_IF(aRv.Failed())){
+    return;
+  }
+
+  uint64_t msgLength = aData.GetSize(aRv);
+  if (NS_WARN_IF(aRv.Failed())){
+    return;
+  }
+
+  if (msgLength > UINT32_MAX) {
+    aRv.Throw(NS_ERROR_FILE_TOO_BIG);
+    return;
+  }
+
+  Send(msgStream, EmptyCString(), msgLength, true, aRv);
+}
+
+void
+WebSocket::Send(const ArrayBuffer& aData,
+                ErrorResult& aRv)
+{
+  AssertIsOnTargetThread();
+
+  aData.ComputeLengthAndData();
+
+  static_assert(sizeof(*aData.Data()) == 1, "byte-sized data required");
+
+  uint32_t len = aData.Length();
+  char* data = reinterpret_cast<char*>(aData.Data());
+
+  nsDependentCSubstring msgString(data, len);
+  Send(nullptr, msgString, len, true, aRv);
+}
+
+void
+WebSocket::Send(const ArrayBufferView& aData,
+                ErrorResult& aRv)
+{
+  AssertIsOnTargetThread();
+
+  aData.ComputeLengthAndData();
+
+  static_assert(sizeof(*aData.Data()) == 1, "byte-sized data required");
+
+  uint32_t len = aData.Length();
+  char* data = reinterpret_cast<char*>(aData.Data());
+
+  nsDependentCSubstring msgString(data, len);
+  Send(nullptr, msgString, len, true, aRv);
+}
+
+void
+WebSocket::Send(nsIInputStream* aMsgStream,
+                const nsACString& aMsgString,
+                uint32_t aMsgLength,
+                bool aIsBinary,
+                ErrorResult& aRv)
+{
+  AssertIsOnTargetThread();
+
+  int64_t readyState = ReadyState();
+  if (readyState == CONNECTING) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return;
+  }
+
+  // Always increment outgoing buffer len, even if closed
+  CheckedUint32 size = mOutgoingBufferedAmount;
+  size += aMsgLength;
+  if (!size.isValid()) {
+    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+    return;
+  }
+
+  mOutgoingBufferedAmount = size.value();
+
+  if (readyState == CLOSING ||
+      readyState == CLOSED) {
+    return;
+  }
+
+  // We must have mImpl when connected.
+  MOZ_ASSERT(mImpl);
+  MOZ_ASSERT(readyState == OPEN, "Unknown state in WebSocket::Send");
+
+  nsresult rv;
+  if (aMsgStream) {
+    rv = mImpl->mChannel->SendBinaryStream(aMsgStream, aMsgLength);
+  } else {
+    if (aIsBinary) {
+      rv = mImpl->mChannel->SendBinaryMsg(aMsgString);
+    } else {
+      rv = mImpl->mChannel->SendMsg(aMsgString);
+    }
+  }
+
+  if (NS_FAILED(rv)) {
+    aRv.Throw(rv);
+    return;
+  }
+
+  UpdateMustKeepAlive();
+}
+
+// webIDL: void close(optional unsigned short code, optional DOMString reason):
+void
+WebSocket::Close(const Optional<uint16_t>& aCode,
+                 const Optional<nsAString>& aReason,
+                 ErrorResult& aRv)
+{
+  AssertIsOnTargetThread();
+
+  // the reason code is optional, but if provided it must be in a specific range
+  uint16_t closeCode = 0;
+  if (aCode.WasPassed()) {
+    if (aCode.Value() != 1000 && (aCode.Value() < 3000 || aCode.Value() > 4999)) {
+      aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+      return;
+    }
+    closeCode = aCode.Value();
+  }
+
+  nsCString closeReason;
+  if (aReason.WasPassed()) {
+    CopyUTF16toUTF8(aReason.Value(), closeReason);
+
+    // The API requires the UTF-8 string to be 123 or less bytes
+    if (closeReason.Length() > 123) {
+      aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
+      return;
+    }
+  }
+
+  int64_t readyState = ReadyState();
+  if (readyState == CLOSING ||
+      readyState == CLOSED) {
+    return;
+  }
+
+  // If the webSocket is not closed we MUST have a mImpl.
+  MOZ_ASSERT(mImpl);
+
+  if (readyState == CONNECTING) {
+    mImpl->FailConnection(closeCode, closeReason);
+    return;
+  }
+
+  MOZ_ASSERT(readyState == OPEN);
+  mImpl->CloseConnection(closeCode, closeReason);
+}
+
+//-----------------------------------------------------------------------------
+// WebSocketImpl::nsIObserver
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+WebSocketImpl::Observe(nsISupports* aSubject,
+                       const char* aTopic,
+                       const char16_t* aData)
+{
+  AssertIsOnMainThread();
+
+  int64_t readyState = mWebSocket->ReadyState();
+  if ((readyState == WebSocket::CLOSING) ||
+      (readyState == WebSocket::CLOSED)) {
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aSubject);
+  if (!mWebSocket->GetOwner() || window != mWebSocket->GetOwner()) {
+    return NS_OK;
+  }
+
+  if ((strcmp(aTopic, DOM_WINDOW_FROZEN_TOPIC) == 0) ||
+      (strcmp(aTopic, DOM_WINDOW_DESTROYED_TOPIC) == 0))
+  {
+    CloseConnection(nsIWebSocketChannel::CLOSE_GOING_AWAY);
+  }
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// WebSocketImpl::nsIRequest
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+WebSocketImpl::GetName(nsACString& aName)
+{
+  AssertIsOnMainThread();
+
+  CopyUTF16toUTF8(mWebSocket->mURI, aName);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::IsPending(bool* aValue)
+{
+  AssertIsOnTargetThread();
+
+  int64_t readyState = mWebSocket->ReadyState();
+  *aValue = (readyState != WebSocket::CLOSED);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::GetStatus(nsresult* aStatus)
+{
+  AssertIsOnTargetThread();
+
+  *aStatus = NS_OK;
+  return NS_OK;
+}
+
+namespace {
+
+class CancelRunnable final : public MainThreadWorkerRunnable
+{
+public:
+  CancelRunnable(WorkerPrivate* aWorkerPrivate, WebSocketImpl* aImpl)
+    : MainThreadWorkerRunnable(aWorkerPrivate)
+    , mImpl(aImpl)
+  {
+  }
+
+  bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
+  {
+    aWorkerPrivate->AssertIsOnWorkerThread();
+    return !NS_FAILED(mImpl->CancelInternal());
+  }
+
+private:
+  RefPtr<WebSocketImpl> mImpl;
+};
+
+} // namespace
+
+// Window closed, stop/reload button pressed, user navigated away from page, etc.
+NS_IMETHODIMP
+WebSocketImpl::Cancel(nsresult aStatus)
+{
+  AssertIsOnMainThread();
+
+  if (!mIsMainThread) {
+    MOZ_ASSERT(mWorkerPrivate);
+    RefPtr<CancelRunnable> runnable =
+      new CancelRunnable(mWorkerPrivate, this);
+    if (!runnable->Dispatch()) {
+      return NS_ERROR_FAILURE;
+    }
+
+    return NS_OK;
+  }
+
+  return CancelInternal();
+}
+
+nsresult
+WebSocketImpl::CancelInternal()
+{
+  AssertIsOnTargetThread();
+
+   // If CancelInternal is called by a runnable, we may already be disconnected
+   // by the time it runs.
+  if (mDisconnectingOrDisconnected) {
+    return NS_OK;
+  }
+
+  int64_t readyState = mWebSocket->ReadyState();
+  if (readyState == WebSocket::CLOSING || readyState == WebSocket::CLOSED) {
+    return NS_OK;
+  }
+
+  return CloseConnection(nsIWebSocketChannel::CLOSE_GOING_AWAY);
+}
+
+NS_IMETHODIMP
+WebSocketImpl::Suspend()
+{
+  AssertIsOnMainThread();
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::Resume()
+{
+  AssertIsOnMainThread();
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::GetLoadGroup(nsILoadGroup** aLoadGroup)
+{
+  AssertIsOnMainThread();
+
+  *aLoadGroup = nullptr;
+
+  if (mIsMainThread) {
+    nsCOMPtr<nsIDocument> doc = mWebSocket->GetDocumentIfCurrent();
+    if (doc) {
+      *aLoadGroup = doc->GetDocumentLoadGroup().take();
+    }
+
+    return NS_OK;
+  }
+
+  MOZ_ASSERT(mWorkerPrivate);
+
+  // Walk up to our containing page
+  WorkerPrivate* wp = mWorkerPrivate;
+  while (wp->GetParent()) {
+    wp = wp->GetParent();
+  }
+
+  nsPIDOMWindowInner* window = wp->GetWindow();
+  if (!window) {
+    return NS_OK;
+  }
+
+  nsIDocument* doc = window->GetExtantDoc();
+  if (doc) {
+    *aLoadGroup = doc->GetDocumentLoadGroup().take();
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::SetLoadGroup(nsILoadGroup* aLoadGroup)
+{
+  AssertIsOnMainThread();
+  return NS_ERROR_UNEXPECTED;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::GetLoadFlags(nsLoadFlags* aLoadFlags)
+{
+  AssertIsOnMainThread();
+
+  *aLoadFlags = nsIRequest::LOAD_BACKGROUND;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::SetLoadFlags(nsLoadFlags aLoadFlags)
+{
+  AssertIsOnMainThread();
+
+  // we won't change the load flags at all.
+  return NS_OK;
+}
+
+namespace {
+
+class WorkerRunnableDispatcher final : public WorkerRunnable
+{
+  RefPtr<WebSocketImpl> mWebSocketImpl;
+
+public:
+  WorkerRunnableDispatcher(WebSocketImpl* aImpl, WorkerPrivate* aWorkerPrivate,
+                           already_AddRefed<nsIRunnable> aEvent)
+    : WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
+    , mWebSocketImpl(aImpl)
+    , mEvent(Move(aEvent))
+  {
+  }
+
+  bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
+  {
+    aWorkerPrivate->AssertIsOnWorkerThread();
+
+    // No messages when disconnected.
+    if (mWebSocketImpl->mDisconnectingOrDisconnected) {
+      NS_WARNING("Dispatching a WebSocket event after the disconnection!");
+      return true;
+    }
+
+    return !NS_FAILED(mEvent->Run());
+  }
+
+  void PostRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
+               bool aRunResult) override
+  {
+  }
+
+  bool
+  PreDispatch(WorkerPrivate* aWorkerPrivate) override
+  {
+    // We don't call WorkerRunnable::PreDispatch because it would assert the
+    // wrong thing about which thread we're on.  We're on whichever thread the
+    // channel implementation is running on (probably the main thread or socket
+    // transport thread).
+    return true;
+  }
+
+  void
+  PostDispatch(WorkerPrivate* aWorkerPrivate, bool aDispatchResult) override
+  {
+    // We don't call WorkerRunnable::PreDispatch because it would assert the
+    // wrong thing about which thread we're on.  We're on whichever thread the
+    // channel implementation is running on (probably the main thread or socket
+    // transport thread).
+  }
+
+private:
+  nsCOMPtr<nsIRunnable> mEvent;
+};
+
+} // namespace
+
+NS_IMETHODIMP
+WebSocketImpl::DispatchFromScript(nsIRunnable* aEvent, uint32_t aFlags)
+{
+  nsCOMPtr<nsIRunnable> event(aEvent);
+  return Dispatch(event.forget(), aFlags);
+}
+
+NS_IMETHODIMP
+WebSocketImpl::Dispatch(already_AddRefed<nsIRunnable> aEvent, uint32_t aFlags)
+{
+  nsCOMPtr<nsIRunnable> event_ref(aEvent);
+  // If the target is the main-thread we can just dispatch the runnable.
+  if (mIsMainThread) {
+    return NS_DispatchToMainThread(event_ref.forget());
+  }
+
+  MutexAutoLock lock(mMutex);
+  if (mWorkerShuttingDown) {
+    return NS_OK;
+  }
+
+  MOZ_DIAGNOSTIC_ASSERT(mWorkerPrivate);
+
+#ifdef DEBUG
+  MOZ_ASSERT(HasWorkerHolderRegistered());
+#endif
+
+  // If the target is a worker, we have to use a custom WorkerRunnableDispatcher
+  // runnable.
+  RefPtr<WorkerRunnableDispatcher> event =
+    new WorkerRunnableDispatcher(this, mWorkerPrivate, event_ref.forget());
+
+  if (!event->Dispatch()) {
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::DelayedDispatch(already_AddRefed<nsIRunnable>, uint32_t)
+{
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+WebSocketImpl::IsOnCurrentThread(bool* aResult)
+{
+  *aResult = IsTargetThread();
+  return NS_OK;
+}
+
+bool
+WebSocketImpl::IsTargetThread() const
+{
+  return NS_IsMainThread() == mIsMainThread;
+}
+
+void
+WebSocket::AssertIsOnTargetThread() const
+{
+  MOZ_ASSERT(NS_IsMainThread() == mIsMainThread);
+}
+
+} // namespace dom
+} // namespace mozilla