import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

netwerk/base/nsBaseChannel.cpp

@@ -0,0 +1,937 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 sts=2 ts=8 et 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 "nsBaseChannel.h"
+#include "nsContentUtils.h"
+#include "nsURLHelper.h"
+#include "nsNetCID.h"
+#include "nsMimeTypes.h"
+#include "nsIContentSniffer.h"
+#include "nsIScriptSecurityManager.h"
+#include "nsMimeTypes.h"
+#include "nsIHttpEventSink.h"
+#include "nsIHttpChannel.h"
+#include "nsIChannelEventSink.h"
+#include "nsIStreamConverterService.h"
+#include "nsChannelClassifier.h"
+#include "nsAsyncRedirectVerifyHelper.h"
+#include "nsProxyRelease.h"
+#include "nsXULAppAPI.h"
+#include "nsContentSecurityManager.h"
+#include "LoadInfo.h"
+#include "nsServiceManagerUtils.h"
+
+// This class is used to suspend a request across a function scope.
+class ScopedRequestSuspender {
+public:
+  explicit ScopedRequestSuspender(nsIRequest *request)
+    : mRequest(request) {
+    if (mRequest && NS_FAILED(mRequest->Suspend())) {
+      NS_WARNING("Couldn't suspend pump");
+      mRequest = nullptr;
+    }
+  }
+  ~ScopedRequestSuspender() {
+    if (mRequest)
+      mRequest->Resume();
+  }
+private:
+  nsIRequest *mRequest;
+};
+
+// Used to suspend data events from mPump within a function scope.  This is
+// usually needed when a function makes callbacks that could process events.
+#define SUSPEND_PUMP_FOR_SCOPE() \
+  ScopedRequestSuspender pump_suspender__(mPump)
+
+//-----------------------------------------------------------------------------
+// nsBaseChannel
+
+nsBaseChannel::nsBaseChannel()
+  : mLoadFlags(LOAD_NORMAL)
+  , mQueriedProgressSink(true)
+  , mSynthProgressEvents(false)
+  , mAllowThreadRetargeting(true)
+  , mWaitingOnAsyncRedirect(false)
+  , mStatus(NS_OK)
+  , mContentDispositionHint(UINT32_MAX)
+  , mContentLength(-1)
+  , mWasOpened(false)
+{
+  mContentType.AssignLiteral(UNKNOWN_CONTENT_TYPE);
+}
+
+nsBaseChannel::~nsBaseChannel()
+{
+  NS_ReleaseOnMainThread(mLoadInfo.forget());
+}
+
+nsresult
+nsBaseChannel::Redirect(nsIChannel *newChannel, uint32_t redirectFlags,
+                        bool openNewChannel)
+{
+  SUSPEND_PUMP_FOR_SCOPE();
+
+  // Transfer properties
+
+  newChannel->SetLoadGroup(mLoadGroup);
+  newChannel->SetNotificationCallbacks(mCallbacks);
+  newChannel->SetLoadFlags(mLoadFlags | LOAD_REPLACE);
+
+  // make a copy of the loadinfo, append to the redirectchain
+  // and set it on the new channel
+  if (mLoadInfo) {
+    nsSecurityFlags secFlags = mLoadInfo->GetSecurityFlags() &
+                               ~nsILoadInfo::SEC_FORCE_INHERIT_PRINCIPAL;
+    nsCOMPtr<nsILoadInfo> newLoadInfo =
+      static_cast<mozilla::LoadInfo*>(mLoadInfo.get())->CloneWithNewSecFlags(secFlags);
+
+    nsCOMPtr<nsIPrincipal> uriPrincipal;
+    nsIScriptSecurityManager *sm = nsContentUtils::GetSecurityManager();
+    sm->GetChannelURIPrincipal(this, getter_AddRefs(uriPrincipal));
+    bool isInternalRedirect =
+      (redirectFlags & (nsIChannelEventSink::REDIRECT_INTERNAL |
+                        nsIChannelEventSink::REDIRECT_STS_UPGRADE));
+    newLoadInfo->AppendRedirectedPrincipal(uriPrincipal, isInternalRedirect);
+    newChannel->SetLoadInfo(newLoadInfo);
+  }
+  else {
+    // the newChannel was created with a dummy loadInfo, we should clear
+    // it in case the original channel does not have a loadInfo
+    newChannel->SetLoadInfo(nullptr);
+  }
+
+  // Preserve the privacy bit if it has been overridden
+  if (mPrivateBrowsingOverriden) {
+    nsCOMPtr<nsIPrivateBrowsingChannel> newPBChannel =
+      do_QueryInterface(newChannel);
+    if (newPBChannel) {
+      newPBChannel->SetPrivate(mPrivateBrowsing);
+    }
+  }
+
+  nsCOMPtr<nsIWritablePropertyBag> bag = ::do_QueryInterface(newChannel);
+  if (bag) {
+    for (auto iter = mPropertyHash.Iter(); !iter.Done(); iter.Next()) {
+      bag->SetProperty(iter.Key(), iter.UserData());
+    }
+  }
+
+  // Notify consumer, giving chance to cancel redirect.  For backwards compat,
+  // we support nsIHttpEventSink if we are an HTTP channel and if this is not
+  // an internal redirect.
+
+  RefPtr<nsAsyncRedirectVerifyHelper> redirectCallbackHelper =
+      new nsAsyncRedirectVerifyHelper();
+
+  bool checkRedirectSynchronously = !openNewChannel;
+
+  mRedirectChannel = newChannel;
+  mRedirectFlags = redirectFlags;
+  mOpenRedirectChannel = openNewChannel;
+  nsresult rv = redirectCallbackHelper->Init(this, newChannel, redirectFlags,
+                                             checkRedirectSynchronously);
+  if (NS_FAILED(rv))
+    return rv;
+
+  if (checkRedirectSynchronously && NS_FAILED(mStatus))
+    return mStatus;
+
+  return NS_OK;
+}
+
+nsresult
+nsBaseChannel::ContinueRedirect()
+{
+  // Backwards compat for non-internal redirects from a HTTP channel.
+  // XXX Is our http channel implementation going to derive from nsBaseChannel?
+  //     If not, this code can be removed.
+  if (!(mRedirectFlags & nsIChannelEventSink::REDIRECT_INTERNAL)) {
+    nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface();
+    if (httpChannel) {
+      nsCOMPtr<nsIHttpEventSink> httpEventSink;
+      GetCallback(httpEventSink);
+      if (httpEventSink) {
+        nsresult rv = httpEventSink->OnRedirect(httpChannel, mRedirectChannel);
+        if (NS_FAILED(rv)) {
+          return rv;
+        }
+      }
+    }
+  }
+
+  // Make sure to do this _after_ making all the OnChannelRedirect calls
+  mRedirectChannel->SetOriginalURI(OriginalURI());
+
+  // If we fail to open the new channel, then we want to leave this channel
+  // unaffected, so we defer tearing down our channel until we have succeeded
+  // with the redirect.
+
+  if (mOpenRedirectChannel) {
+    nsresult rv = NS_OK;
+    if (mLoadInfo && mLoadInfo->GetEnforceSecurity()) {
+      MOZ_ASSERT(!mListenerContext, "mListenerContext should be null!");
+      rv = mRedirectChannel->AsyncOpen2(mListener);
+    }
+    else {
+      rv = mRedirectChannel->AsyncOpen(mListener, mListenerContext);
+    }
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  mRedirectChannel = nullptr;
+
+  // close down this channel
+  Cancel(NS_BINDING_REDIRECTED);
+  ChannelDone();
+
+  return NS_OK;
+}
+
+bool
+nsBaseChannel::HasContentTypeHint() const
+{
+  NS_ASSERTION(!Pending(), "HasContentTypeHint called too late");
+  return !mContentType.EqualsLiteral(UNKNOWN_CONTENT_TYPE);
+}
+
+nsresult
+nsBaseChannel::PushStreamConverter(const char *fromType,
+                                   const char *toType,
+                                   bool invalidatesContentLength,
+                                   nsIStreamListener **result)
+{
+  NS_ASSERTION(mListener, "no listener");
+
+  nsresult rv;
+  nsCOMPtr<nsIStreamConverterService> scs =
+      do_GetService(NS_STREAMCONVERTERSERVICE_CONTRACTID, &rv);
+  if (NS_FAILED(rv))
+    return rv;
+
+  nsCOMPtr<nsIStreamListener> converter;
+  rv = scs->AsyncConvertData(fromType, toType, mListener, mListenerContext,
+                             getter_AddRefs(converter));
+  if (NS_SUCCEEDED(rv)) {
+    mListener = converter;
+    if (invalidatesContentLength)
+      mContentLength = -1;
+    if (result) {
+      *result = nullptr;
+      converter.swap(*result);
+    }
+  }
+  return rv;
+}
+
+nsresult
+nsBaseChannel::BeginPumpingData()
+{
+  nsCOMPtr<nsIInputStream> stream;
+  nsCOMPtr<nsIChannel> channel;
+  nsresult rv = OpenContentStream(true, getter_AddRefs(stream),
+                                  getter_AddRefs(channel));
+  if (NS_FAILED(rv))
+    return rv;
+
+  NS_ASSERTION(!stream || !channel, "Got both a channel and a stream?");
+
+  if (channel) {
+      rv = NS_DispatchToCurrentThread(new RedirectRunnable(this, channel));
+      if (NS_SUCCEEDED(rv))
+          mWaitingOnAsyncRedirect = true;
+      return rv;
+  }
+
+  // By assigning mPump, we flag this channel as pending (see Pending).  It's
+  // important that the pending flag is set when we call into the stream (the
+  // call to AsyncRead results in the stream's AsyncWait method being called)
+  // and especially when we call into the loadgroup.  Our caller takes care to
+  // release mPump if we return an error.
+ 
+  rv = nsInputStreamPump::Create(getter_AddRefs(mPump), stream, -1, -1, 0, 0,
+                                 true);
+  if (NS_SUCCEEDED(rv))
+    rv = mPump->AsyncRead(this, nullptr);
+
+  return rv;
+}
+
+void
+nsBaseChannel::HandleAsyncRedirect(nsIChannel* newChannel)
+{
+  NS_ASSERTION(!mPump, "Shouldn't have gotten here");
+
+  nsresult rv = mStatus;
+  if (NS_SUCCEEDED(mStatus)) {
+    rv = Redirect(newChannel,
+                  nsIChannelEventSink::REDIRECT_TEMPORARY,
+                  true);
+    if (NS_SUCCEEDED(rv)) {
+      // OnRedirectVerifyCallback will be called asynchronously
+      return;
+    }
+  }
+
+  ContinueHandleAsyncRedirect(rv);
+}
+
+void
+nsBaseChannel::ContinueHandleAsyncRedirect(nsresult result)
+{
+  mWaitingOnAsyncRedirect = false;
+
+  if (NS_FAILED(result))
+    Cancel(result);
+
+  if (NS_FAILED(result) && mListener) {
+    // Notify our consumer ourselves
+    mListener->OnStartRequest(this, mListenerContext);
+    mListener->OnStopRequest(this, mListenerContext, mStatus);
+    ChannelDone();
+  }
+
+  if (mLoadGroup)
+    mLoadGroup->RemoveRequest(this, nullptr, mStatus);
+
+  // Drop notification callbacks to prevent cycles.
+  mCallbacks = nullptr;
+  CallbacksChanged();
+}
+
+void
+nsBaseChannel::ClassifyURI()
+{
+  // For channels created in the child process, delegate to the parent to
+  // classify URIs.
+  if (!XRE_IsParentProcess()) {
+    return;
+  }
+
+  if (mLoadFlags & LOAD_CLASSIFY_URI) {
+    RefPtr<nsChannelClassifier> classifier = new nsChannelClassifier();
+    if (classifier) {
+      classifier->Start(this);
+    } else {
+      Cancel(NS_ERROR_OUT_OF_MEMORY);
+    }
+  }
+}
+
+//-----------------------------------------------------------------------------
+// nsBaseChannel::nsISupports
+
+NS_IMPL_ISUPPORTS_INHERITED(nsBaseChannel,
+                            nsHashPropertyBag,
+                            nsIRequest,
+                            nsIChannel,
+                            nsIThreadRetargetableRequest,
+                            nsIInterfaceRequestor,
+                            nsITransportEventSink,
+                            nsIRequestObserver,
+                            nsIStreamListener,
+                            nsIThreadRetargetableStreamListener,
+                            nsIAsyncVerifyRedirectCallback,
+                            nsIPrivateBrowsingChannel)
+
+//-----------------------------------------------------------------------------
+// nsBaseChannel::nsIRequest
+
+NS_IMETHODIMP
+nsBaseChannel::GetName(nsACString &result)
+{
+  if (!mURI) {
+    result.Truncate();
+    return NS_OK;
+  }
+  return mURI->GetSpec(result);
+}
+
+NS_IMETHODIMP
+nsBaseChannel::IsPending(bool *result)
+{
+  *result = Pending();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetStatus(nsresult *status)
+{
+  if (mPump && NS_SUCCEEDED(mStatus)) {
+    mPump->GetStatus(status);
+  } else {
+    *status = mStatus;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::Cancel(nsresult status)
+{
+  // Ignore redundant cancelation
+  if (NS_FAILED(mStatus))
+    return NS_OK;
+
+  mStatus = status;
+
+  if (mPump)
+    mPump->Cancel(status);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::Suspend()
+{
+  NS_ENSURE_TRUE(mPump, NS_ERROR_NOT_INITIALIZED);
+  return mPump->Suspend();
+}
+
+NS_IMETHODIMP
+nsBaseChannel::Resume()
+{
+  NS_ENSURE_TRUE(mPump, NS_ERROR_NOT_INITIALIZED);
+  return mPump->Resume();
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetLoadFlags(nsLoadFlags *aLoadFlags)
+{
+  *aLoadFlags = mLoadFlags;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetLoadFlags(nsLoadFlags aLoadFlags)
+{
+  mLoadFlags = aLoadFlags;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetLoadGroup(nsILoadGroup **aLoadGroup)
+{
+  NS_IF_ADDREF(*aLoadGroup = mLoadGroup);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetLoadGroup(nsILoadGroup *aLoadGroup)
+{
+  if (!CanSetLoadGroup(aLoadGroup)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  mLoadGroup = aLoadGroup;
+  CallbacksChanged();
+  UpdatePrivateBrowsing();
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsBaseChannel::nsIChannel
+
+NS_IMETHODIMP
+nsBaseChannel::GetOriginalURI(nsIURI **aURI)
+{
+  *aURI = OriginalURI();
+  NS_ADDREF(*aURI);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetOriginalURI(nsIURI *aURI)
+{
+  NS_ENSURE_ARG_POINTER(aURI);
+  mOriginalURI = aURI;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetURI(nsIURI **aURI)
+{
+  NS_IF_ADDREF(*aURI = mURI);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetOwner(nsISupports **aOwner)
+{
+  NS_IF_ADDREF(*aOwner = mOwner);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetOwner(nsISupports *aOwner)
+{
+  mOwner = aOwner;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetLoadInfo(nsILoadInfo* aLoadInfo)
+{
+  mLoadInfo = aLoadInfo;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetLoadInfo(nsILoadInfo** aLoadInfo)
+{
+  NS_IF_ADDREF(*aLoadInfo = mLoadInfo);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetNotificationCallbacks(nsIInterfaceRequestor **aCallbacks)
+{
+  NS_IF_ADDREF(*aCallbacks = mCallbacks);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetNotificationCallbacks(nsIInterfaceRequestor *aCallbacks)
+{
+  if (!CanSetCallbacks(aCallbacks)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  mCallbacks = aCallbacks;
+  CallbacksChanged();
+  UpdatePrivateBrowsing();
+  return NS_OK;
+}
+
+NS_IMETHODIMP 
+nsBaseChannel::GetSecurityInfo(nsISupports **aSecurityInfo)
+{
+  NS_IF_ADDREF(*aSecurityInfo = mSecurityInfo);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetContentType(nsACString &aContentType)
+{
+  aContentType = mContentType;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetContentType(const nsACString &aContentType)
+{
+  // mContentCharset is unchanged if not parsed
+  bool dummy;
+  net_ParseContentType(aContentType, mContentType, mContentCharset, &dummy);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetContentCharset(nsACString &aContentCharset)
+{
+  aContentCharset = mContentCharset;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetContentCharset(const nsACString &aContentCharset)
+{
+  mContentCharset = aContentCharset;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetContentDisposition(uint32_t *aContentDisposition)
+{
+  // preserve old behavior, fail unless explicitly set.
+  if (mContentDispositionHint == UINT32_MAX) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  *aContentDisposition = mContentDispositionHint;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetContentDisposition(uint32_t aContentDisposition)
+{
+  mContentDispositionHint = aContentDisposition;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetContentDispositionFilename(nsAString &aContentDispositionFilename)
+{
+  if (!mContentDispositionFilename) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  aContentDispositionFilename = *mContentDispositionFilename;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetContentDispositionFilename(const nsAString &aContentDispositionFilename)
+{
+  mContentDispositionFilename = new nsString(aContentDispositionFilename);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetContentDispositionHeader(nsACString &aContentDispositionHeader)
+{
+  return NS_ERROR_NOT_AVAILABLE;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::GetContentLength(int64_t *aContentLength)
+{
+  *aContentLength = mContentLength;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::SetContentLength(int64_t aContentLength)
+{
+  mContentLength = aContentLength;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::Open(nsIInputStream **result)
+{
+  NS_ENSURE_TRUE(mURI, NS_ERROR_NOT_INITIALIZED);
+  NS_ENSURE_TRUE(!mPump, NS_ERROR_IN_PROGRESS);
+  NS_ENSURE_TRUE(!mWasOpened, NS_ERROR_IN_PROGRESS);
+
+  nsCOMPtr<nsIChannel> chan;
+  nsresult rv = OpenContentStream(false, result, getter_AddRefs(chan));
+  NS_ASSERTION(!chan || !*result, "Got both a channel and a stream?");
+  if (NS_SUCCEEDED(rv) && chan) {
+      rv = Redirect(chan, nsIChannelEventSink::REDIRECT_INTERNAL, false);
+      if (NS_FAILED(rv))
+          return rv;
+      rv = chan->Open(result);
+  } else if (rv == NS_ERROR_NOT_IMPLEMENTED)
+    return NS_ImplementChannelOpen(this, result);
+
+  if (NS_SUCCEEDED(rv)) {
+    mWasOpened = true;
+    ClassifyURI();
+  }
+
+  return rv;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::Open2(nsIInputStream** aStream)
+{
+  nsCOMPtr<nsIStreamListener> listener;
+  nsresult rv = nsContentSecurityManager::doContentSecurityCheck(this, listener);
+  NS_ENSURE_SUCCESS(rv, rv);
+  return Open(aStream);
+}
+
+NS_IMETHODIMP
+nsBaseChannel::AsyncOpen(nsIStreamListener *listener, nsISupports *ctxt)
+{
+  MOZ_ASSERT(!mLoadInfo ||
+             mLoadInfo->GetSecurityMode() == 0 ||
+             mLoadInfo->GetInitialSecurityCheckDone() ||
+             (mLoadInfo->GetSecurityMode() == nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL &&
+              nsContentUtils::IsSystemPrincipal(mLoadInfo->LoadingPrincipal())),
+             "security flags in loadInfo but asyncOpen2() not called");
+
+  NS_ENSURE_TRUE(mURI, NS_ERROR_NOT_INITIALIZED);
+  NS_ENSURE_TRUE(!mPump, NS_ERROR_IN_PROGRESS);
+  NS_ENSURE_TRUE(!mWasOpened, NS_ERROR_ALREADY_OPENED);
+  NS_ENSURE_ARG(listener);
+
+  // Skip checking for chrome:// sub-resources.
+  nsAutoCString scheme;
+  mURI->GetScheme(scheme);
+  if (!scheme.EqualsLiteral("file")) {
+    NS_CompareLoadInfoAndLoadContext(this);
+  }
+
+  // Ensure that this is an allowed port before proceeding.
+  nsresult rv = NS_CheckPortSafety(mURI);
+  if (NS_FAILED(rv)) {
+    mCallbacks = nullptr;
+    return rv;
+  }
+
+  // Store the listener and context early so that OpenContentStream and the
+  // stream's AsyncWait method (called by AsyncRead) can have access to them
+  // via PushStreamConverter and the StreamListener methods.  However, since
+  // this typically introduces a reference cycle between this and the listener,
+  // we need to be sure to break the reference if this method does not succeed.
+  mListener = listener;
+  mListenerContext = ctxt;
+
+  // This method assigns mPump as a side-effect.  We need to clear mPump if
+  // this method fails.
+  rv = BeginPumpingData();
+  if (NS_FAILED(rv)) {
+    mPump = nullptr;
+    ChannelDone();
+    mCallbacks = nullptr;
+    return rv;
+  }
+
+  // At this point, we are going to return success no matter what.
+
+  mWasOpened = true;
+
+  SUSPEND_PUMP_FOR_SCOPE();
+
+  if (mLoadGroup)
+    mLoadGroup->AddRequest(this, nullptr);
+
+  ClassifyURI();
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::AsyncOpen2(nsIStreamListener *aListener)
+{
+  nsCOMPtr<nsIStreamListener> listener = aListener;
+  nsresult rv = nsContentSecurityManager::doContentSecurityCheck(this, listener);
+  NS_ENSURE_SUCCESS(rv, rv);
+  return AsyncOpen(listener, nullptr);
+}
+
+//-----------------------------------------------------------------------------
+// nsBaseChannel::nsITransportEventSink
+
+NS_IMETHODIMP
+nsBaseChannel::OnTransportStatus(nsITransport *transport, nsresult status,
+                                 int64_t progress, int64_t progressMax)
+{
+  // In some cases, we may wish to suppress transport-layer status events.
+
+  if (!mPump || NS_FAILED(mStatus)) {
+    return NS_OK;
+  }
+
+  SUSPEND_PUMP_FOR_SCOPE();
+
+  // Lazily fetch mProgressSink
+  if (!mProgressSink) {
+    if (mQueriedProgressSink) {
+      return NS_OK;
+    }
+    GetCallback(mProgressSink);
+    mQueriedProgressSink = true;
+    if (!mProgressSink) {
+      return NS_OK;
+    }
+  }
+
+  if (!HasLoadFlag(LOAD_BACKGROUND)) {
+    nsAutoString statusArg;
+    if (GetStatusArg(status, statusArg)) {
+      mProgressSink->OnStatus(this, mListenerContext, status, statusArg.get());
+    }
+  }
+
+  if (progress) {
+    mProgressSink->OnProgress(this, mListenerContext, progress, progressMax);
+  }
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsBaseChannel::nsIInterfaceRequestor
+
+NS_IMETHODIMP
+nsBaseChannel::GetInterface(const nsIID &iid, void **result)
+{
+  NS_QueryNotificationCallbacks(mCallbacks, mLoadGroup, iid, result);
+  return *result ? NS_OK : NS_ERROR_NO_INTERFACE; 
+}
+
+//-----------------------------------------------------------------------------
+// nsBaseChannel::nsIRequestObserver
+
+static void
+CallTypeSniffers(void *aClosure, const uint8_t *aData, uint32_t aCount)
+{
+  nsIChannel *chan = static_cast<nsIChannel*>(aClosure);
+
+  nsAutoCString newType;
+  NS_SniffContent(NS_CONTENT_SNIFFER_CATEGORY, chan, aData, aCount, newType);
+  if (!newType.IsEmpty()) {
+    chan->SetContentType(newType);
+  }
+}
+
+static void
+CallUnknownTypeSniffer(void *aClosure, const uint8_t *aData, uint32_t aCount)
+{
+  nsIChannel *chan = static_cast<nsIChannel*>(aClosure);
+
+  nsCOMPtr<nsIContentSniffer> sniffer =
+    do_CreateInstance(NS_GENERIC_CONTENT_SNIFFER);
+  if (!sniffer)
+    return;
+
+  nsAutoCString detected;
+  nsresult rv = sniffer->GetMIMETypeFromContent(chan, aData, aCount, detected);
+  if (NS_SUCCEEDED(rv))
+    chan->SetContentType(detected);
+}
+
+NS_IMETHODIMP
+nsBaseChannel::OnStartRequest(nsIRequest *request, nsISupports *ctxt)
+{
+  MOZ_ASSERT(request == mPump);
+
+  // If our content type is unknown, use the content type
+  // sniffer. If the sniffer is not available for some reason, then we just keep
+  // going as-is.
+  if (NS_SUCCEEDED(mStatus) &&
+      mContentType.EqualsLiteral(UNKNOWN_CONTENT_TYPE)) {
+    mPump->PeekStream(CallUnknownTypeSniffer, static_cast<nsIChannel*>(this));
+  }
+
+  // Now, the general type sniffers. Skip this if we have none.
+  if (mLoadFlags & LOAD_CALL_CONTENT_SNIFFERS)
+    mPump->PeekStream(CallTypeSniffers, static_cast<nsIChannel*>(this));
+
+  SUSPEND_PUMP_FOR_SCOPE();
+
+  if (mListener) // null in case of redirect
+      return mListener->OnStartRequest(this, mListenerContext);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::OnStopRequest(nsIRequest *request, nsISupports *ctxt,
+                             nsresult status)
+{
+  // If both mStatus and status are failure codes, we keep mStatus as-is since
+  // that is consistent with our GetStatus and Cancel methods.
+  if (NS_SUCCEEDED(mStatus))
+    mStatus = status;
+
+  // Cause Pending to return false.
+  mPump = nullptr;
+
+  if (mListener) // null in case of redirect
+      mListener->OnStopRequest(this, mListenerContext, mStatus);
+  ChannelDone();
+
+  // No need to suspend pump in this scope since we will not be receiving
+  // any more events from it.
+
+  if (mLoadGroup)
+    mLoadGroup->RemoveRequest(this, nullptr, mStatus);
+
+  // Drop notification callbacks to prevent cycles.
+  mCallbacks = nullptr;
+  CallbacksChanged();
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsBaseChannel::nsIStreamListener
+
+NS_IMETHODIMP
+nsBaseChannel::OnDataAvailable(nsIRequest *request, nsISupports *ctxt,
+                               nsIInputStream *stream, uint64_t offset,
+                               uint32_t count)
+{
+  SUSPEND_PUMP_FOR_SCOPE();
+
+  nsresult rv = mListener->OnDataAvailable(this, mListenerContext, stream,
+                                           offset, count);
+  if (mSynthProgressEvents && NS_SUCCEEDED(rv)) {
+    int64_t prog = offset + count;
+    if (NS_IsMainThread()) {
+      OnTransportStatus(nullptr, NS_NET_STATUS_READING, prog, mContentLength);
+    } else {
+      class OnTransportStatusAsyncEvent : public mozilla::Runnable
+      {
+        RefPtr<nsBaseChannel> mChannel;
+        int64_t mProgress;
+        int64_t mContentLength;
+      public:
+        OnTransportStatusAsyncEvent(nsBaseChannel* aChannel,
+                                    int64_t aProgress,
+                                    int64_t aContentLength)
+          : mChannel(aChannel),
+            mProgress(aProgress),
+            mContentLength(aContentLength)
+        { }
+
+        NS_IMETHOD Run() override
+        {
+          return mChannel->OnTransportStatus(nullptr, NS_NET_STATUS_READING,
+                                             mProgress, mContentLength);
+        }
+      };
+
+      nsCOMPtr<nsIRunnable> runnable =
+        new OnTransportStatusAsyncEvent(this, prog, mContentLength);
+      NS_DispatchToMainThread(runnable);
+    }
+  }
+
+  return rv;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::OnRedirectVerifyCallback(nsresult result)
+{
+  if (NS_SUCCEEDED(result))
+    result = ContinueRedirect();
+
+  if (NS_FAILED(result) && !mWaitingOnAsyncRedirect) {
+    if (NS_SUCCEEDED(mStatus))
+      mStatus = result;
+    return NS_OK;
+  }
+
+  if (mWaitingOnAsyncRedirect)
+    ContinueHandleAsyncRedirect(result);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseChannel::RetargetDeliveryTo(nsIEventTarget* aEventTarget)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  NS_ENSURE_TRUE(mPump, NS_ERROR_NOT_INITIALIZED);
+
+  if (!mAllowThreadRetargeting) {
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
+  return mPump->RetargetDeliveryTo(aEventTarget);
+}
+
+NS_IMETHODIMP
+nsBaseChannel::CheckListenerChain()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!mAllowThreadRetargeting) {
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
+  nsCOMPtr<nsIThreadRetargetableStreamListener> listener =
+    do_QueryInterface(mListener);
+  if (!listener) {
+    return NS_ERROR_NO_INTERFACE;
+  }
+
+  return listener->CheckListenerChain();
+}