Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1581 insertions, 0 deletions

diff --git a/netwerk/protocol/http/TRRServiceChannel.cpp b/netwerk/protocol/http/TRRServiceChannel.cpp
new file mode 100644
index 0000000000..3a316d1e45
--- /dev/null
+++ b/netwerk/protocol/http/TRRServiceChannel.cpp
@@ -0,0 +1,1581 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=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 "TRRServiceChannel.h"
+
+#include "HttpLog.h"
+#include "AltServiceChild.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/StaticPrefs_network.h"
+#include "mozilla/Unused.h"
+#include "nsDNSPrefetch.h"
+#include "nsEscape.h"
+#include "nsHttpTransaction.h"
+#include "nsICancelable.h"
+#include "nsICachingChannel.h"
+#include "nsIHttpPushListener.h"
+#include "nsIProtocolProxyService2.h"
+#include "nsIOService.h"
+#include "nsISeekableStream.h"
+#include "nsURLHelper.h"
+#include "ProxyConfigLookup.h"
+#include "TRRLoadInfo.h"
+#include "ReferrerInfo.h"
+#include "TRR.h"
+#include "TRRService.h"
+
+namespace mozilla::net {
+
+NS_IMPL_ADDREF(TRRServiceChannel)
+
+// Because nsSupportsWeakReference isn't thread-safe we must ensure that
+// TRRServiceChannel is destroyed on the target thread. Any Release() called
+// on a different thread is dispatched to the target thread.
+bool TRRServiceChannel::DispatchRelease() {
+  if (mCurrentEventTarget->IsOnCurrentThread()) {
+    return false;
+  }
+
+  mCurrentEventTarget->Dispatch(
+      NewNonOwningRunnableMethod("net::TRRServiceChannel::Release", this,
+                                 &TRRServiceChannel::Release),
+      NS_DISPATCH_NORMAL);
+
+  return true;
+}
+
+NS_IMETHODIMP_(MozExternalRefCountType)
+TRRServiceChannel::Release() {
+  nsrefcnt count = mRefCnt - 1;
+  if (DispatchRelease()) {
+    // Redispatched to the target thread.
+    return count;
+  }
+
+  MOZ_ASSERT(0 != mRefCnt, "dup release");
+  count = --mRefCnt;
+  NS_LOG_RELEASE(this, count, "TRRServiceChannel");
+
+  if (0 == count) {
+    mRefCnt = 1;
+    delete (this);
+    return 0;
+  }
+
+  return count;
+}
+
+NS_INTERFACE_MAP_BEGIN(TRRServiceChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIRequest)
+  NS_INTERFACE_MAP_ENTRY(nsIChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIHttpChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIHttpChannelInternal)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsPriority)
+  NS_INTERFACE_MAP_ENTRY(nsIClassOfService)
+  NS_INTERFACE_MAP_ENTRY(nsIProxiedChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIProtocolProxyCallback)
+  NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
+  NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
+  NS_INTERFACE_MAP_ENTRY(nsITransportEventSink)
+  NS_INTERFACE_MAP_ENTRY(nsIDNSListener)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+  NS_INTERFACE_MAP_ENTRY(nsIUploadChannel2)
+  NS_INTERFACE_MAP_ENTRY_CONCRETE(TRRServiceChannel)
+NS_INTERFACE_MAP_END_INHERITING(HttpBaseChannel)
+
+TRRServiceChannel::TRRServiceChannel()
+    : HttpAsyncAborter<TRRServiceChannel>(this),
+      mProxyRequest(nullptr, "TRRServiceChannel::mProxyRequest"),
+      mCurrentEventTarget(GetCurrentSerialEventTarget()) {
+  LOG(("TRRServiceChannel ctor [this=%p]\n", this));
+}
+
+TRRServiceChannel::~TRRServiceChannel() {
+  LOG(("TRRServiceChannel dtor [this=%p]\n", this));
+}
+
+NS_IMETHODIMP TRRServiceChannel::SetCanceledReason(const nsACString& aReason) {
+  return SetCanceledReasonImpl(aReason);
+}
+
+NS_IMETHODIMP TRRServiceChannel::GetCanceledReason(nsACString& aReason) {
+  return GetCanceledReasonImpl(aReason);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::CancelWithReason(nsresult aStatus,
+                                    const nsACString& aReason) {
+  return CancelWithReasonImpl(aStatus, aReason);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::Cancel(nsresult status) {
+  LOG(("TRRServiceChannel::Cancel [this=%p status=%" PRIx32 "]\n", this,
+       static_cast<uint32_t>(status)));
+  if (mCanceled) {
+    LOG(("  ignoring; already canceled\n"));
+    return NS_OK;
+  }
+
+  mCanceled = true;
+  mStatus = status;
+
+  nsCOMPtr<nsICancelable> proxyRequest;
+  {
+    auto req = mProxyRequest.Lock();
+    proxyRequest.swap(*req);
+  }
+
+  if (proxyRequest) {
+    NS_DispatchToMainThread(
+        NS_NewRunnableFunction(
+            "CancelProxyRequest",
+            [proxyRequest, status]() { proxyRequest->Cancel(status); }),
+        NS_DISPATCH_NORMAL);
+  }
+
+  CancelNetworkRequest(status);
+  return NS_OK;
+}
+
+void TRRServiceChannel::CancelNetworkRequest(nsresult aStatus) {
+  if (mTransaction) {
+    nsresult rv = gHttpHandler->CancelTransaction(mTransaction, aStatus);
+    if (NS_FAILED(rv)) {
+      LOG(("failed to cancel the transaction\n"));
+    }
+  }
+  if (mTransactionPump) mTransactionPump->Cancel(aStatus);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::Suspend() {
+  LOG(("TRRServiceChannel::SuspendInternal [this=%p]\n", this));
+
+  if (mTransactionPump) {
+    return mTransactionPump->Suspend();
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::Resume() {
+  LOG(("TRRServiceChannel::Resume [this=%p]\n", this));
+
+  if (mTransactionPump) {
+    return mTransactionPump->Resume();
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetSecurityInfo(nsITransportSecurityInfo** securityInfo) {
+  NS_ENSURE_ARG_POINTER(securityInfo);
+  *securityInfo = do_AddRef(mSecurityInfo).take();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::AsyncOpen(nsIStreamListener* aListener) {
+  NS_ENSURE_ARG_POINTER(aListener);
+  NS_ENSURE_TRUE(!LoadIsPending(), NS_ERROR_IN_PROGRESS);
+  NS_ENSURE_TRUE(!LoadWasOpened(), NS_ERROR_ALREADY_OPENED);
+
+  if (mCanceled) {
+    ReleaseListeners();
+    return mStatus;
+  }
+
+  // HttpBaseChannel::MaybeWaitForUploadStreamNormalization can only be used on
+  // main thread, so we can only return an error here.
+#ifdef NIGHTLY_BUILD
+  MOZ_ASSERT(!LoadPendingUploadStreamNormalization());
+#endif
+  if (LoadPendingUploadStreamNormalization()) {
+    return NS_ERROR_FAILURE;
+  }
+
+  if (!gHttpHandler->Active()) {
+    LOG(("  after HTTP shutdown..."));
+    ReleaseListeners();
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  nsresult rv = NS_CheckPortSafety(mURI);
+  if (NS_FAILED(rv)) {
+    ReleaseListeners();
+    return rv;
+  }
+
+  StoreIsPending(true);
+  StoreWasOpened(true);
+
+  mListener = aListener;
+
+  mAsyncOpenTime = TimeStamp::Now();
+
+  rv = MaybeResolveProxyAndBeginConnect();
+  if (NS_FAILED(rv)) {
+    Unused << AsyncAbort(rv);
+  }
+
+  return NS_OK;
+}
+
+nsresult TRRServiceChannel::MaybeResolveProxyAndBeginConnect() {
+  nsresult rv;
+
+  // The common case for HTTP channels is to begin proxy resolution and return
+  // at this point. The only time we know mProxyInfo already is if we're
+  // proxying a non-http protocol like ftp. We don't need to discover proxy
+  // settings if we are never going to make a network connection.
+  // If mConnectionInfo is already supplied, we don't need to do proxy
+  // resolution again.
+  if (!mProxyInfo && !mConnectionInfo &&
+      !(mLoadFlags & (nsICachingChannel::LOAD_ONLY_FROM_CACHE |
+                      nsICachingChannel::LOAD_NO_NETWORK_IO)) &&
+      NS_SUCCEEDED(ResolveProxy())) {
+    return NS_OK;
+  }
+
+  rv = BeginConnect();
+  if (NS_FAILED(rv)) {
+    Unused << AsyncAbort(rv);
+  }
+
+  return NS_OK;
+}
+
+nsresult TRRServiceChannel::ResolveProxy() {
+  LOG(("TRRServiceChannel::ResolveProxy [this=%p]\n", this));
+  if (!NS_IsMainThread()) {
+    return NS_DispatchToMainThread(
+        NewRunnableMethod("TRRServiceChannel::ResolveProxy", this,
+                          &TRRServiceChannel::ResolveProxy),
+        NS_DISPATCH_NORMAL);
+  }
+
+  MOZ_ASSERT(NS_IsMainThread());
+
+  // TODO: bug 1625171. Consider moving proxy resolution to socket process.
+  RefPtr<TRRServiceChannel> self = this;
+  nsCOMPtr<nsICancelable> proxyRequest;
+  nsresult rv = ProxyConfigLookup::Create(
+      [self](nsIProxyInfo* aProxyInfo, nsresult aStatus) {
+        self->OnProxyAvailable(nullptr, nullptr, aProxyInfo, aStatus);
+      },
+      mURI, mProxyResolveFlags, getter_AddRefs(proxyRequest));
+
+  if (NS_FAILED(rv)) {
+    if (!mCurrentEventTarget->IsOnCurrentThread()) {
+      return mCurrentEventTarget->Dispatch(
+          NewRunnableMethod<nsresult>("TRRServiceChannel::AsyncAbort", this,
+                                      &TRRServiceChannel::AsyncAbort, rv),
+          NS_DISPATCH_NORMAL);
+    }
+  }
+
+  {
+    auto req = mProxyRequest.Lock();
+    // We only set mProxyRequest if the channel hasn't already been cancelled
+    // on another thread.
+    if (!mCanceled) {
+      *req = proxyRequest.forget();
+    }
+  }
+
+  // If the channel has been cancelled, we go ahead and cancel the proxy
+  // request right here.
+  if (proxyRequest) {
+    proxyRequest->Cancel(mStatus);
+  }
+
+  return rv;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::OnProxyAvailable(nsICancelable* request, nsIChannel* channel,
+                                    nsIProxyInfo* pi, nsresult status) {
+  LOG(("TRRServiceChannel::OnProxyAvailable [this=%p pi=%p status=%" PRIx32
+       " mStatus=%" PRIx32 "]\n",
+       this, pi, static_cast<uint32_t>(status),
+       static_cast<uint32_t>(static_cast<nsresult>(mStatus))));
+
+  if (!mCurrentEventTarget->IsOnCurrentThread()) {
+    RefPtr<TRRServiceChannel> self = this;
+    nsCOMPtr<nsIProxyInfo> info = pi;
+    return mCurrentEventTarget->Dispatch(
+        NS_NewRunnableFunction("TRRServiceChannel::OnProxyAvailable",
+                               [self, info, status]() {
+                                 self->OnProxyAvailable(nullptr, nullptr, info,
+                                                        status);
+                               }),
+        NS_DISPATCH_NORMAL);
+  }
+
+  MOZ_ASSERT(mCurrentEventTarget->IsOnCurrentThread());
+
+  {
+    auto proxyRequest = mProxyRequest.Lock();
+    *proxyRequest = nullptr;
+  }
+
+  nsresult rv;
+
+  // If status is a failure code, then it means that we failed to resolve
+  // proxy info.  That is a non-fatal error assuming it wasn't because the
+  // request was canceled.  We just failover to DIRECT when proxy resolution
+  // fails (failure can mean that the PAC URL could not be loaded).
+
+  if (NS_SUCCEEDED(status)) mProxyInfo = pi;
+
+  if (!gHttpHandler->Active()) {
+    LOG(
+        ("nsHttpChannel::OnProxyAvailable [this=%p] "
+         "Handler no longer active.\n",
+         this));
+    rv = NS_ERROR_NOT_AVAILABLE;
+  } else {
+    rv = BeginConnect();
+  }
+
+  if (NS_FAILED(rv)) {
+    Unused << AsyncAbort(rv);
+  }
+  return rv;
+}
+
+nsresult TRRServiceChannel::BeginConnect() {
+  LOG(("TRRServiceChannel::BeginConnect [this=%p]\n", this));
+  nsresult rv;
+
+  // Construct connection info object
+  nsAutoCString host;
+  nsAutoCString scheme;
+  int32_t port = -1;
+  bool isHttps = mURI->SchemeIs("https");
+
+  rv = mURI->GetScheme(scheme);
+  if (NS_SUCCEEDED(rv)) rv = mURI->GetAsciiHost(host);
+  if (NS_SUCCEEDED(rv)) rv = mURI->GetPort(&port);
+  if (NS_SUCCEEDED(rv)) rv = mURI->GetAsciiSpec(mSpec);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  // Just a warning here because some nsIURIs do not implement this method.
+  Unused << NS_WARN_IF(NS_FAILED(mURI->GetUsername(mUsername)));
+
+  // Reject the URL if it doesn't specify a host
+  if (host.IsEmpty()) {
+    rv = NS_ERROR_MALFORMED_URI;
+    return rv;
+  }
+  LOG(("host=%s port=%d\n", host.get(), port));
+  LOG(("uri=%s\n", mSpec.get()));
+
+  nsCOMPtr<nsProxyInfo> proxyInfo;
+  if (mProxyInfo) proxyInfo = do_QueryInterface(mProxyInfo);
+
+  mRequestHead.SetHTTPS(isHttps);
+  mRequestHead.SetOrigin(scheme, host, port);
+
+  RefPtr<nsHttpConnectionInfo> connInfo = new nsHttpConnectionInfo(
+      host, port, ""_ns, mUsername, proxyInfo, OriginAttributes(), isHttps);
+  // TODO: Bug 1622778 for using AltService in socket process.
+  StoreAllowAltSvc(XRE_IsParentProcess() && LoadAllowAltSvc());
+  bool http2Allowed = !gHttpHandler->IsHttp2Excluded(connInfo);
+  bool http3Allowed = Http3Allowed();
+  if (!http3Allowed) {
+    mCaps |= NS_HTTP_DISALLOW_HTTP3;
+  }
+
+  RefPtr<AltSvcMapping> mapping;
+  if (!mConnectionInfo && LoadAllowAltSvc() &&  // per channel
+      (http2Allowed || http3Allowed) && !(mLoadFlags & LOAD_FRESH_CONNECTION) &&
+      AltSvcMapping::AcceptableProxy(proxyInfo) &&
+      (scheme.EqualsLiteral("http") || scheme.EqualsLiteral("https")) &&
+      (mapping = gHttpHandler->GetAltServiceMapping(
+           scheme, host, port, mPrivateBrowsing, OriginAttributes(),
+           http2Allowed, http3Allowed))) {
+    LOG(("TRRServiceChannel %p Alt Service Mapping Found %s://%s:%d [%s]\n",
+         this, scheme.get(), mapping->AlternateHost().get(),
+         mapping->AlternatePort(), mapping->HashKey().get()));
+
+    if (!(mLoadFlags & LOAD_ANONYMOUS) && !mPrivateBrowsing) {
+      nsAutoCString altUsedLine(mapping->AlternateHost());
+      bool defaultPort =
+          mapping->AlternatePort() ==
+          (isHttps ? NS_HTTPS_DEFAULT_PORT : NS_HTTP_DEFAULT_PORT);
+      if (!defaultPort) {
+        altUsedLine.AppendLiteral(":");
+        altUsedLine.AppendInt(mapping->AlternatePort());
+      }
+      rv = mRequestHead.SetHeader(nsHttp::Alternate_Service_Used, altUsedLine);
+      MOZ_ASSERT(NS_SUCCEEDED(rv));
+    }
+
+    LOG(("TRRServiceChannel %p Using connection info from altsvc mapping",
+         this));
+    mapping->GetConnectionInfo(getter_AddRefs(mConnectionInfo), proxyInfo,
+                               OriginAttributes());
+    Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC, true);
+    Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC_OE, !isHttps);
+  } else if (mConnectionInfo) {
+    LOG(("TRRServiceChannel %p Using channel supplied connection info", this));
+  } else {
+    LOG(("TRRServiceChannel %p Using default connection info", this));
+
+    mConnectionInfo = connInfo;
+    Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC, false);
+  }
+
+  // Need to re-ask the handler, since mConnectionInfo may not be the connInfo
+  // we used earlier
+  if (gHttpHandler->IsHttp2Excluded(mConnectionInfo)) {
+    StoreAllowSpdy(0);
+    mCaps |= NS_HTTP_DISALLOW_SPDY;
+    mConnectionInfo->SetNoSpdy(true);
+  }
+
+  // If TimingEnabled flag is not set after OnModifyRequest() then
+  // clear the already recorded AsyncOpen value for consistency.
+  if (!LoadTimingEnabled()) mAsyncOpenTime = TimeStamp();
+
+  // if this somehow fails we can go on without it
+  Unused << gHttpHandler->AddConnectionHeader(&mRequestHead, mCaps);
+
+  // Adjust mCaps according to our request headers:
+  //  - If "Connection: close" is set as a request header, then do not bother
+  //    trying to establish a keep-alive connection.
+  if (mRequestHead.HasHeaderValue(nsHttp::Connection, "close")) {
+    mCaps &= ~(NS_HTTP_ALLOW_KEEPALIVE);
+  }
+
+  if (gHttpHandler->CriticalRequestPrioritization()) {
+    if (mClassOfService.Flags() & nsIClassOfService::Leader) {
+      mCaps |= NS_HTTP_LOAD_AS_BLOCKING;
+    }
+    if (mClassOfService.Flags() & nsIClassOfService::Unblocked) {
+      mCaps |= NS_HTTP_LOAD_UNBLOCKED;
+    }
+    if (mClassOfService.Flags() & nsIClassOfService::UrgentStart &&
+        gHttpHandler->IsUrgentStartEnabled()) {
+      mCaps |= NS_HTTP_URGENT_START;
+      SetPriority(nsISupportsPriority::PRIORITY_HIGHEST);
+    }
+  }
+
+  if (mCanceled) {
+    return mStatus;
+  }
+
+  MaybeStartDNSPrefetch();
+
+  rv = ContinueOnBeforeConnect();
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  return NS_OK;
+}
+
+nsresult TRRServiceChannel::ContinueOnBeforeConnect() {
+  LOG(("TRRServiceChannel::ContinueOnBeforeConnect [this=%p]\n", this));
+
+  // ensure that we are using a valid hostname
+  if (!net_IsValidHostName(nsDependentCString(mConnectionInfo->Origin()))) {
+    return NS_ERROR_UNKNOWN_HOST;
+  }
+
+  if (LoadIsTRRServiceChannel()) {
+    mCaps |= NS_HTTP_LARGE_KEEPALIVE;
+    mCaps |= NS_HTTP_DISALLOW_HTTPS_RR;
+  }
+
+  mCaps |= NS_HTTP_TRR_FLAGS_FROM_MODE(nsIRequest::GetTRRMode());
+
+  // Finalize ConnectionInfo flags before SpeculativeConnect
+  mConnectionInfo->SetAnonymous((mLoadFlags & LOAD_ANONYMOUS) != 0);
+  mConnectionInfo->SetPrivate(mPrivateBrowsing);
+  mConnectionInfo->SetNoSpdy(mCaps & NS_HTTP_DISALLOW_SPDY);
+  mConnectionInfo->SetBeConservative((mCaps & NS_HTTP_BE_CONSERVATIVE) ||
+                                     LoadBeConservative());
+  mConnectionInfo->SetTlsFlags(mTlsFlags);
+  mConnectionInfo->SetIsTrrServiceChannel(LoadIsTRRServiceChannel());
+  mConnectionInfo->SetTRRMode(nsIRequest::GetTRRMode());
+  mConnectionInfo->SetIPv4Disabled(mCaps & NS_HTTP_DISABLE_IPV4);
+  mConnectionInfo->SetIPv6Disabled(mCaps & NS_HTTP_DISABLE_IPV6);
+
+  if (mLoadFlags & LOAD_FRESH_CONNECTION) {
+    Telemetry::ScalarAdd(
+        Telemetry::ScalarID::NETWORKING_TRR_CONNECTION_CYCLE_COUNT,
+        NS_ConvertUTF8toUTF16(TRRService::ProviderKey()), 1);
+    nsresult rv =
+        gHttpHandler->ConnMgr()->DoSingleConnectionCleanup(mConnectionInfo);
+    LOG(
+        ("TRRServiceChannel::BeginConnect "
+         "DoSingleConnectionCleanup succeeded=%d %08x [this=%p]",
+         NS_SUCCEEDED(rv), static_cast<uint32_t>(rv), this));
+  }
+
+  return Connect();
+}
+
+nsresult TRRServiceChannel::Connect() {
+  LOG(("TRRServiceChannel::Connect [this=%p]\n", this));
+
+  nsresult rv = SetupTransaction();
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  rv = gHttpHandler->InitiateTransaction(mTransaction, mPriority);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  return mTransaction->AsyncRead(this, getter_AddRefs(mTransactionPump));
+}
+
+nsresult TRRServiceChannel::SetupTransaction() {
+  LOG((
+      "TRRServiceChannel::SetupTransaction "
+      "[this=%p, cos=%lu, inc=%d, prio=%d]\n",
+      this, mClassOfService.Flags(), mClassOfService.Incremental(), mPriority));
+
+  NS_ENSURE_TRUE(!mTransaction, NS_ERROR_ALREADY_INITIALIZED);
+
+  nsresult rv;
+
+  if (!LoadAllowSpdy()) {
+    mCaps |= NS_HTTP_DISALLOW_SPDY;
+  }
+  // Check a proxy info from mConnectionInfo. TRR channel may use a proxy that
+  // is set in mConnectionInfo but acutally the channel do not have mProxyInfo
+  // set. This can happend when network.trr.async_connInfo is true.
+  bool useNonDirectProxy = mConnectionInfo->ProxyInfo()
+                               ? !mConnectionInfo->ProxyInfo()->IsDirect()
+                               : false;
+  if (!Http3Allowed() || useNonDirectProxy) {
+    mCaps |= NS_HTTP_DISALLOW_HTTP3;
+  }
+  if (LoadBeConservative()) {
+    mCaps |= NS_HTTP_BE_CONSERVATIVE;
+  }
+
+  // Use the URI path if not proxying (transparent proxying such as proxy
+  // CONNECT does not count here). Also figure out what HTTP version to use.
+  nsAutoCString buf, path;
+  nsCString* requestURI;
+
+  // This is the normal e2e H1 path syntax "/index.html"
+  rv = mURI->GetPathQueryRef(path);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  // path may contain UTF-8 characters, so ensure that they're escaped.
+  if (NS_EscapeURL(path.get(), path.Length(), esc_OnlyNonASCII | esc_Spaces,
+                   buf)) {
+    requestURI = &buf;
+  } else {
+    requestURI = &path;
+  }
+
+  // trim off the #ref portion if any...
+  int32_t ref1 = requestURI->FindChar('#');
+  if (ref1 != kNotFound) {
+    requestURI->SetLength(ref1);
+  }
+
+  if (mConnectionInfo->UsingConnect() || !mConnectionInfo->UsingHttpProxy()) {
+    mRequestHead.SetVersion(gHttpHandler->HttpVersion());
+  } else {
+    mRequestHead.SetPath(*requestURI);
+
+    // RequestURI should be the absolute uri H1 proxy syntax
+    // "http://foo/index.html" so we will overwrite the relative version in
+    // requestURI
+    rv = mURI->GetUserPass(buf);
+    if (NS_FAILED(rv)) return rv;
+    if (!buf.IsEmpty() && ((strncmp(mSpec.get(), "http:", 5) == 0) ||
+                           strncmp(mSpec.get(), "https:", 6) == 0)) {
+      nsCOMPtr<nsIURI> tempURI = nsIOService::CreateExposableURI(mURI);
+      rv = tempURI->GetAsciiSpec(path);
+      if (NS_FAILED(rv)) return rv;
+      requestURI = &path;
+    } else {
+      requestURI = &mSpec;
+    }
+
+    // trim off the #ref portion if any...
+    int32_t ref2 = requestURI->FindChar('#');
+    if (ref2 != kNotFound) {
+      requestURI->SetLength(ref2);
+    }
+
+    mRequestHead.SetVersion(gHttpHandler->ProxyHttpVersion());
+  }
+
+  mRequestHead.SetRequestURI(*requestURI);
+
+  // Force setting no-cache header for TRRServiceChannel.
+  // We need to send 'Pragma:no-cache' to inhibit proxy caching even if
+  // no proxy is configured since we might be talking with a transparent
+  // proxy, i.e. one that operates at the network level.  See bug #14772.
+  rv = mRequestHead.SetHeaderOnce(nsHttp::Pragma, "no-cache", true);
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
+  // If we're configured to speak HTTP/1.1 then also send 'Cache-control:
+  // no-cache'
+  if (mRequestHead.Version() >= HttpVersion::v1_1) {
+    rv = mRequestHead.SetHeaderOnce(nsHttp::Cache_Control, "no-cache", true);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+  }
+
+  // create wrapper for this channel's notification callbacks
+  nsCOMPtr<nsIInterfaceRequestor> callbacks;
+  NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
+                                         getter_AddRefs(callbacks));
+
+  // create the transaction object
+  mTransaction = new nsHttpTransaction();
+  LOG1(("TRRServiceChannel %p created nsHttpTransaction %p\n", this,
+        mTransaction.get()));
+
+  // See bug #466080. Transfer LOAD_ANONYMOUS flag to socket-layer.
+  if (mLoadFlags & LOAD_ANONYMOUS) mCaps |= NS_HTTP_LOAD_ANONYMOUS;
+
+  if (LoadTimingEnabled()) mCaps |= NS_HTTP_TIMING_ENABLED;
+
+  nsCOMPtr<nsIHttpPushListener> pushListener;
+  NS_QueryNotificationCallbacks(mCallbacks, mLoadGroup,
+                                NS_GET_IID(nsIHttpPushListener),
+                                getter_AddRefs(pushListener));
+  HttpTransactionShell::OnPushCallback pushCallback = nullptr;
+  if (pushListener) {
+    mCaps |= NS_HTTP_ONPUSH_LISTENER;
+    nsWeakPtr weakPtrThis(
+        do_GetWeakReference(static_cast<nsIHttpChannel*>(this)));
+    pushCallback = [weakPtrThis](uint32_t aPushedStreamId,
+                                 const nsACString& aUrl,
+                                 const nsACString& aRequestString,
+                                 HttpTransactionShell* aTransaction) {
+      if (nsCOMPtr<nsIHttpChannel> channel = do_QueryReferent(weakPtrThis)) {
+        return static_cast<TRRServiceChannel*>(channel.get())
+            ->OnPush(aPushedStreamId, aUrl, aRequestString, aTransaction);
+      }
+      return NS_ERROR_NOT_AVAILABLE;
+    };
+  }
+
+  EnsureRequestContext();
+
+  rv = mTransaction->Init(
+      mCaps, mConnectionInfo, &mRequestHead, mUploadStream, mReqContentLength,
+      LoadUploadStreamHasHeaders(), mCurrentEventTarget, callbacks, this,
+      mBrowserId, HttpTrafficCategory::eInvalid, mRequestContext,
+      mClassOfService, mInitialRwin, LoadResponseTimeoutEnabled(), mChannelId,
+      nullptr, std::move(pushCallback), mTransWithPushedStream,
+      mPushedStreamId);
+
+  mTransWithPushedStream = nullptr;
+
+  if (NS_FAILED(rv)) {
+    mTransaction = nullptr;
+    return rv;
+  }
+
+  return rv;
+}
+
+void TRRServiceChannel::SetPushedStreamTransactionAndId(
+    HttpTransactionShell* aTransWithPushedStream, uint32_t aPushedStreamId) {
+  MOZ_ASSERT(!mTransWithPushedStream);
+  LOG(("TRRServiceChannel::SetPushedStreamTransaction [this=%p] trans=%p", this,
+       aTransWithPushedStream));
+
+  mTransWithPushedStream = aTransWithPushedStream;
+  mPushedStreamId = aPushedStreamId;
+}
+
+nsresult TRRServiceChannel::OnPush(uint32_t aPushedStreamId,
+                                   const nsACString& aUrl,
+                                   const nsACString& aRequestString,
+                                   HttpTransactionShell* aTransaction) {
+  MOZ_ASSERT(aTransaction);
+  LOG(("TRRServiceChannel::OnPush [this=%p, trans=%p]\n", this, aTransaction));
+
+  MOZ_ASSERT(mCaps & NS_HTTP_ONPUSH_LISTENER);
+  nsCOMPtr<nsIHttpPushListener> pushListener;
+  NS_QueryNotificationCallbacks(mCallbacks, mLoadGroup,
+                                NS_GET_IID(nsIHttpPushListener),
+                                getter_AddRefs(pushListener));
+
+  if (!pushListener) {
+    LOG(
+        ("TRRServiceChannel::OnPush [this=%p] notification callbacks do not "
+         "implement nsIHttpPushListener\n",
+         this));
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  nsCOMPtr<nsIURI> pushResource;
+  nsresult rv;
+
+  // Create a Channel for the Push Resource
+  rv = NS_NewURI(getter_AddRefs(pushResource), aUrl);
+  if (NS_FAILED(rv)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsILoadInfo> loadInfo =
+      static_cast<TRRLoadInfo*>(mLoadInfo.get())->Clone();
+  nsCOMPtr<nsIChannel> pushHttpChannel;
+  rv = gHttpHandler->CreateTRRServiceChannel(pushResource, nullptr, 0, nullptr,
+                                             loadInfo,
+                                             getter_AddRefs(pushHttpChannel));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = pushHttpChannel->SetLoadFlags(mLoadFlags);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  RefPtr<TRRServiceChannel> channel;
+  CallQueryInterface(pushHttpChannel, channel.StartAssignment());
+  MOZ_ASSERT(channel);
+  if (!channel) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  // new channel needs mrqeuesthead and headers from pushedStream
+  channel->mRequestHead.ParseHeaderSet(aRequestString.BeginReading());
+  channel->mLoadGroup = mLoadGroup;
+  channel->mCallbacks = mCallbacks;
+
+  // Link the pushed stream with the new channel and call listener
+  channel->SetPushedStreamTransactionAndId(aTransaction, aPushedStreamId);
+  rv = pushListener->OnPush(this, channel);
+  return rv;
+}
+
+void TRRServiceChannel::MaybeStartDNSPrefetch() {
+  if (mConnectionInfo->UsingHttpProxy() ||
+      (mLoadFlags & (nsICachingChannel::LOAD_NO_NETWORK_IO |
+                     nsICachingChannel::LOAD_ONLY_FROM_CACHE))) {
+    return;
+  }
+
+  LOG(
+      ("TRRServiceChannel::MaybeStartDNSPrefetch [this=%p] "
+       "prefetching%s\n",
+       this, mCaps & NS_HTTP_REFRESH_DNS ? ", refresh requested" : ""));
+
+  OriginAttributes originAttributes;
+  mDNSPrefetch =
+      new nsDNSPrefetch(mURI, originAttributes, nsIRequest::GetTRRMode(), this,
+                        LoadTimingEnabled());
+  nsIDNSService::DNSFlags dnsFlags = nsIDNSService::RESOLVE_DEFAULT_FLAGS;
+  if (mCaps & NS_HTTP_REFRESH_DNS) {
+    dnsFlags |= nsIDNSService::RESOLVE_BYPASS_CACHE;
+  }
+  nsresult rv = mDNSPrefetch->PrefetchHigh(dnsFlags);
+  NS_ENSURE_SUCCESS_VOID(rv);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::OnTransportStatus(nsITransport* trans, nsresult status,
+                                     int64_t progress, int64_t progressMax) {
+  return NS_OK;
+}
+
+nsresult TRRServiceChannel::CallOnStartRequest() {
+  LOG(("TRRServiceChannel::CallOnStartRequest [this=%p]", this));
+
+  if (LoadOnStartRequestCalled()) {
+    LOG(("CallOnStartRequest already invoked before"));
+    return mStatus;
+  }
+
+  nsresult rv = NS_OK;
+  StoreTracingEnabled(false);
+
+  // Ensure mListener->OnStartRequest will be invoked before exiting
+  // this function.
+  auto onStartGuard = MakeScopeExit([&] {
+    LOG(
+        ("  calling mListener->OnStartRequest by ScopeExit [this=%p, "
+         "listener=%p]\n",
+         this, mListener.get()));
+    MOZ_ASSERT(!LoadOnStartRequestCalled());
+
+    if (mListener) {
+      nsCOMPtr<nsIStreamListener> deleteProtector(mListener);
+      StoreOnStartRequestCalled(true);
+      deleteProtector->OnStartRequest(this);
+    }
+    StoreOnStartRequestCalled(true);
+  });
+
+  if (mResponseHead && !mResponseHead->HasContentCharset()) {
+    mResponseHead->SetContentCharset(mContentCharsetHint);
+  }
+
+  LOG(("  calling mListener->OnStartRequest [this=%p, listener=%p]\n", this,
+       mListener.get()));
+
+  // About to call OnStartRequest, dismiss the guard object.
+  onStartGuard.release();
+
+  if (mListener) {
+    MOZ_ASSERT(!LoadOnStartRequestCalled(),
+               "We should not call OsStartRequest twice");
+    nsCOMPtr<nsIStreamListener> deleteProtector(mListener);
+    StoreOnStartRequestCalled(true);
+    rv = deleteProtector->OnStartRequest(this);
+    if (NS_FAILED(rv)) return rv;
+  } else {
+    NS_WARNING("OnStartRequest skipped because of null listener");
+    StoreOnStartRequestCalled(true);
+  }
+
+  if (!mResponseHead) {
+    return NS_OK;
+  }
+
+  nsAutoCString contentEncoding;
+  rv = mResponseHead->GetHeader(nsHttp::Content_Encoding, contentEncoding);
+  if (NS_FAILED(rv) || contentEncoding.IsEmpty()) {
+    return NS_OK;
+  }
+
+  // DoApplyContentConversions can only be called on the main thread.
+  if (NS_IsMainThread()) {
+    nsCOMPtr<nsIStreamListener> listener;
+    rv =
+        DoApplyContentConversions(mListener, getter_AddRefs(listener), nullptr);
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
+
+    AfterApplyContentConversions(rv, listener);
+    return NS_OK;
+  }
+
+  Suspend();
+
+  RefPtr<TRRServiceChannel> self = this;
+  rv = NS_DispatchToMainThread(
+      NS_NewRunnableFunction("TRRServiceChannel::DoApplyContentConversions",
+                             [self]() {
+                               nsCOMPtr<nsIStreamListener> listener;
+                               nsresult rv = self->DoApplyContentConversions(
+                                   self->mListener, getter_AddRefs(listener),
+                                   nullptr);
+                               self->AfterApplyContentConversions(rv, listener);
+                             }),
+      NS_DISPATCH_NORMAL);
+  if (NS_FAILED(rv)) {
+    Resume();
+    return rv;
+  }
+
+  return NS_OK;
+}
+
+void TRRServiceChannel::AfterApplyContentConversions(
+    nsresult aResult, nsIStreamListener* aListener) {
+  LOG(("TRRServiceChannel::AfterApplyContentConversions [this=%p]", this));
+  if (!mCurrentEventTarget->IsOnCurrentThread()) {
+    RefPtr<TRRServiceChannel> self = this;
+    nsCOMPtr<nsIStreamListener> listener = aListener;
+    self->mCurrentEventTarget->Dispatch(
+        NS_NewRunnableFunction(
+            "TRRServiceChannel::AfterApplyContentConversions",
+            [self, aResult, listener]() {
+              self->Resume();
+              self->AfterApplyContentConversions(aResult, listener);
+            }),
+        NS_DISPATCH_NORMAL);
+    return;
+  }
+
+  if (mCanceled) {
+    return;
+  }
+
+  if (NS_FAILED(aResult)) {
+    Unused << AsyncAbort(aResult);
+    return;
+  }
+
+  if (aListener) {
+    mListener = aListener;
+    mCompressListener = aListener;
+    StoreHasAppliedConversion(true);
+  }
+}
+
+void TRRServiceChannel::ProcessAltService() {
+  // e.g. Alt-Svc: h2=":443"; ma=60
+  // e.g. Alt-Svc: h2="otherhost:443"
+  // Alt-Svc       = 1#( alternative *( OWS ";" OWS parameter ) )
+  // alternative   = protocol-id "=" alt-authority
+  // protocol-id   = token ; percent-encoded ALPN protocol identifier
+  // alt-authority = quoted-string ;  containing [ uri-host ] ":" port
+
+  if (!LoadAllowAltSvc()) {  // per channel opt out
+    return;
+  }
+
+  if (!gHttpHandler->AllowAltSvc() || (mCaps & NS_HTTP_DISALLOW_SPDY)) {
+    return;
+  }
+
+  nsCString scheme;
+  mURI->GetScheme(scheme);
+  bool isHttp = scheme.EqualsLiteral("http");
+  if (!isHttp && !scheme.EqualsLiteral("https")) {
+    return;
+  }
+
+  nsCString altSvc;
+  Unused << mResponseHead->GetHeader(nsHttp::Alternate_Service, altSvc);
+  if (altSvc.IsEmpty()) {
+    return;
+  }
+
+  if (!nsHttp::IsReasonableHeaderValue(altSvc)) {
+    LOG(("Alt-Svc Response Header seems unreasonable - skipping\n"));
+    return;
+  }
+
+  nsCString originHost;
+  int32_t originPort = 80;
+  mURI->GetPort(&originPort);
+  if (NS_FAILED(mURI->GetAsciiHost(originHost))) {
+    return;
+  }
+
+  nsCOMPtr<nsIInterfaceRequestor> callbacks;
+  nsCOMPtr<nsProxyInfo> proxyInfo;
+  NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
+                                         getter_AddRefs(callbacks));
+  if (mProxyInfo) {
+    proxyInfo = do_QueryInterface(mProxyInfo);
+  }
+
+  auto processHeaderTask = [altSvc, scheme, originHost, originPort,
+                            userName(mUsername),
+                            privateBrowsing(mPrivateBrowsing), callbacks,
+                            proxyInfo, caps(mCaps)]() {
+    if (XRE_IsSocketProcess()) {
+      AltServiceChild::ProcessHeader(altSvc, scheme, originHost, originPort,
+                                     userName, privateBrowsing, callbacks,
+                                     proxyInfo, caps & NS_HTTP_DISALLOW_SPDY,
+                                     OriginAttributes());
+      return;
+    }
+
+    AltSvcMapping::ProcessHeader(
+        altSvc, scheme, originHost, originPort, userName, privateBrowsing,
+        callbacks, proxyInfo, caps & NS_HTTP_DISALLOW_SPDY, OriginAttributes());
+  };
+
+  if (NS_IsMainThread()) {
+    processHeaderTask();
+    return;
+  }
+
+  NS_DispatchToMainThread(NS_NewRunnableFunction(
+      "TRRServiceChannel::ProcessAltService", std::move(processHeaderTask)));
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::OnStartRequest(nsIRequest* request) {
+  LOG(("TRRServiceChannel::OnStartRequest [this=%p request=%p status=%" PRIx32
+       "]\n",
+       this, request, static_cast<uint32_t>(static_cast<nsresult>(mStatus))));
+
+  if (!(mCanceled || NS_FAILED(mStatus))) {
+    // capture the request's status, so our consumers will know ASAP of any
+    // connection failures, etc - bug 93581
+    nsresult status;
+    request->GetStatus(&status);
+    mStatus = status;
+  }
+
+  MOZ_ASSERT(request == mTransactionPump, "Unexpected request");
+
+  StoreAfterOnStartRequestBegun(true);
+  if (mTransaction) {
+    if (!mSecurityInfo) {
+      // grab the security info from the connection object; the transaction
+      // is guaranteed to own a reference to the connection.
+      mSecurityInfo = mTransaction->SecurityInfo();
+    }
+  }
+
+  if (NS_SUCCEEDED(mStatus) && mTransaction) {
+    // mTransactionPump doesn't hit OnInputStreamReady and call this until
+    // all of the response headers have been acquired, so we can take
+    // ownership of them from the transaction.
+    mResponseHead = mTransaction->TakeResponseHead();
+    if (mResponseHead) {
+      uint32_t httpStatus = mResponseHead->Status();
+      if (mTransaction->ProxyConnectFailed()) {
+        LOG(("TRRServiceChannel proxy connect failed httpStatus: %d",
+             httpStatus));
+        MOZ_ASSERT(mConnectionInfo->UsingConnect(),
+                   "proxy connect failed but not using CONNECT?");
+        nsresult rv = HttpProxyResponseToErrorCode(httpStatus);
+        mTransaction->DontReuseConnection();
+        Cancel(rv);
+        return CallOnStartRequest();
+      }
+
+      if ((httpStatus < 500) && (httpStatus != 421) && (httpStatus != 407)) {
+        ProcessAltService();
+      }
+
+      if (httpStatus == 300 || httpStatus == 301 || httpStatus == 302 ||
+          httpStatus == 303 || httpStatus == 307 || httpStatus == 308) {
+        nsresult rv = SyncProcessRedirection(httpStatus);
+        if (NS_SUCCEEDED(rv)) {
+          return rv;
+        }
+
+        mStatus = rv;
+        DoNotifyListener();
+        return rv;
+      }
+    } else {
+      NS_WARNING("No response head in OnStartRequest");
+    }
+  }
+
+  // avoid crashing if mListener happens to be null...
+  if (!mListener) {
+    MOZ_ASSERT_UNREACHABLE("mListener is null");
+    return NS_OK;
+  }
+
+  return CallOnStartRequest();
+}
+
+nsresult TRRServiceChannel::SyncProcessRedirection(uint32_t aHttpStatus) {
+  nsAutoCString location;
+
+  // if a location header was not given, then we can't perform the redirect,
+  // so just carry on as though this were a normal response.
+  if (NS_FAILED(mResponseHead->GetHeader(nsHttp::Location, location))) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // make sure non-ASCII characters in the location header are escaped.
+  nsAutoCString locationBuf;
+  if (NS_EscapeURL(location.get(), -1, esc_OnlyNonASCII | esc_Spaces,
+                   locationBuf)) {
+    location = locationBuf;
+  }
+
+  LOG(("redirecting to: %s [redirection-limit=%u]\n", location.get(),
+       uint32_t(mRedirectionLimit)));
+
+  nsCOMPtr<nsIURI> redirectURI;
+  nsresult rv = NS_NewURI(getter_AddRefs(redirectURI), location);
+
+  if (NS_FAILED(rv)) {
+    LOG(("Invalid URI for redirect: Location: %s\n", location.get()));
+    return NS_ERROR_CORRUPTED_CONTENT;
+  }
+
+  // move the reference of the old location to the new one if the new
+  // one has none.
+  PropagateReferenceIfNeeded(mURI, redirectURI);
+
+  bool rewriteToGET =
+      ShouldRewriteRedirectToGET(aHttpStatus, mRequestHead.ParsedMethod());
+
+  // Let's not rewrite the method to GET for TRR requests.
+  if (rewriteToGET) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // If the method is not safe (such as POST, PUT, DELETE, ...)
+  if (!mRequestHead.IsSafeMethod()) {
+    LOG(("TRRServiceChannel: unsafe redirect to:%s\n", location.get()));
+  }
+
+  uint32_t redirectFlags;
+  if (nsHttp::IsPermanentRedirect(aHttpStatus)) {
+    redirectFlags = nsIChannelEventSink::REDIRECT_PERMANENT;
+  } else {
+    redirectFlags = nsIChannelEventSink::REDIRECT_TEMPORARY;
+  }
+
+  nsCOMPtr<nsIChannel> newChannel;
+  nsCOMPtr<nsILoadInfo> redirectLoadInfo =
+      static_cast<TRRLoadInfo*>(mLoadInfo.get())->Clone();
+  rv = gHttpHandler->CreateTRRServiceChannel(redirectURI, nullptr, 0, nullptr,
+                                             redirectLoadInfo,
+                                             getter_AddRefs(newChannel));
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  rv = SetupReplacementChannel(redirectURI, newChannel, !rewriteToGET,
+                               redirectFlags);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  // Make sure to do this after we received redirect veto answer,
+  // i.e. after all sinks had been notified
+  newChannel->SetOriginalURI(mOriginalURI);
+
+  rv = newChannel->AsyncOpen(mListener);
+  LOG(("  new channel AsyncOpen returned %" PRIX32, static_cast<uint32_t>(rv)));
+
+  // close down this channel
+  Cancel(NS_BINDING_REDIRECTED);
+
+  ReleaseListeners();
+
+  return NS_OK;
+}
+
+nsresult TRRServiceChannel::SetupReplacementChannel(nsIURI* aNewURI,
+                                                    nsIChannel* aNewChannel,
+                                                    bool aPreserveMethod,
+                                                    uint32_t aRedirectFlags) {
+  LOG(
+      ("TRRServiceChannel::SetupReplacementChannel "
+       "[this=%p newChannel=%p preserveMethod=%d]",
+       this, aNewChannel, aPreserveMethod));
+
+  nsresult rv = HttpBaseChannel::SetupReplacementChannel(
+      aNewURI, aNewChannel, aPreserveMethod, aRedirectFlags);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  rv = CheckRedirectLimit(aRedirectFlags);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aNewChannel);
+  if (!httpChannel) {
+    MOZ_ASSERT(false);
+    return NS_ERROR_FAILURE;
+  }
+
+  // convey the ApplyConversion flag (bug 91862)
+  nsCOMPtr<nsIEncodedChannel> encodedChannel = do_QueryInterface(httpChannel);
+  if (encodedChannel) {
+    encodedChannel->SetApplyConversion(LoadApplyConversion());
+  }
+
+  if (mContentTypeHint.IsEmpty()) {
+    return NS_OK;
+  }
+
+  // Make sure we set content-type on the old channel properly.
+  MOZ_ASSERT(mContentTypeHint.Equals("application/dns-message"));
+
+  // Apply TRR specific settings. Note that we already know mContentTypeHint is
+  // "application/dns-message" here.
+  return TRR::SetupTRRServiceChannelInternal(
+      httpChannel,
+      mRequestHead.ParsedMethod() == nsHttpRequestHead::kMethod_Get,
+      mContentTypeHint);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::OnDataAvailable(nsIRequest* request, nsIInputStream* input,
+                                   uint64_t offset, uint32_t count) {
+  LOG(("TRRServiceChannel::OnDataAvailable [this=%p request=%p offset=%" PRIu64
+       " count=%" PRIu32 "]\n",
+       this, request, offset, count));
+
+  // don't send out OnDataAvailable notifications if we've been canceled.
+  if (mCanceled) return mStatus;
+
+  MOZ_ASSERT(mResponseHead, "No response head in ODA!!");
+
+  if (mListener) {
+    return mListener->OnDataAvailable(this, input, offset, count);
+  }
+
+  return NS_ERROR_ABORT;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::OnStopRequest(nsIRequest* request, nsresult status) {
+  LOG(("TRRServiceChannel::OnStopRequest [this=%p request=%p status=%" PRIx32
+       "]\n",
+       this, request, static_cast<uint32_t>(status)));
+
+  if (mCanceled || NS_FAILED(mStatus)) status = mStatus;
+
+  mTransactionTimings = mTransaction->Timings();
+  mTransaction = nullptr;
+  mTransactionPump = nullptr;
+
+  if (mListener) {
+    LOG(("TRRServiceChannel %p calling OnStopRequest\n", this));
+    MOZ_ASSERT(LoadOnStartRequestCalled(),
+               "OnStartRequest should be called before OnStopRequest");
+    MOZ_ASSERT(!LoadOnStopRequestCalled(),
+               "We should not call OnStopRequest twice");
+    StoreOnStopRequestCalled(true);
+    mListener->OnStopRequest(this, status);
+  }
+  StoreOnStopRequestCalled(true);
+
+  mDNSPrefetch = nullptr;
+
+  if (mLoadGroup) {
+    mLoadGroup->RemoveRequest(this, nullptr, status);
+  }
+
+  ReleaseListeners();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::OnLookupComplete(nsICancelable* request, nsIDNSRecord* rec,
+                                    nsresult status) {
+  LOG(
+      ("TRRServiceChannel::OnLookupComplete [this=%p] prefetch complete%s: "
+       "%s status[0x%" PRIx32 "]\n",
+       this, mCaps & NS_HTTP_REFRESH_DNS ? ", refresh requested" : "",
+       NS_SUCCEEDED(status) ? "success" : "failure",
+       static_cast<uint32_t>(status)));
+
+  // We no longer need the dns prefetch object. Note: mDNSPrefetch could be
+  // validly null if OnStopRequest has already been called.
+  // We only need the domainLookup timestamps when not loading from cache
+  if (mDNSPrefetch && mDNSPrefetch->TimingsValid() && mTransaction) {
+    TimeStamp connectStart = mTransaction->GetConnectStart();
+    TimeStamp requestStart = mTransaction->GetRequestStart();
+    // We only set the domainLookup timestamps if we're not using a
+    // persistent connection.
+    if (requestStart.IsNull() && connectStart.IsNull()) {
+      mTransaction->SetDomainLookupStart(mDNSPrefetch->StartTimestamp());
+      mTransaction->SetDomainLookupEnd(mDNSPrefetch->EndTimestamp());
+    }
+  }
+  mDNSPrefetch = nullptr;
+
+  // Unset DNS cache refresh if it was requested,
+  if (mCaps & NS_HTTP_REFRESH_DNS) {
+    mCaps &= ~NS_HTTP_REFRESH_DNS;
+    if (mTransaction) {
+      mTransaction->SetDNSWasRefreshed();
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::LogBlockedCORSRequest(const nsAString& aMessage,
+                                         const nsACString& aCategory,
+                                         bool aIsWarning) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::LogMimeTypeMismatch(const nsACString& aMessageName,
+                                       bool aWarning, const nsAString& aURL,
+                                       const nsAString& aContentType) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetIsAuthChannel(bool* aIsAuthChannel) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::SetNotificationCallbacks(nsIInterfaceRequestor* aCallbacks) {
+  mCallbacks = aCallbacks;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::SetPriority(int32_t value) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+void TRRServiceChannel::OnClassOfServiceUpdated() {
+  LOG(("TRRServiceChannel::OnClassOfServiceUpdated this=%p, cos=%lu inc=%d",
+       this, mClassOfService.Flags(), mClassOfService.Incremental()));
+
+  if (mTransaction) {
+    gHttpHandler->UpdateClassOfServiceOnTransaction(mTransaction,
+                                                    mClassOfService);
+  }
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::SetClassFlags(uint32_t inFlags) {
+  uint32_t previous = mClassOfService.Flags();
+  mClassOfService.SetFlags(inFlags);
+  if (previous != mClassOfService.Flags()) {
+    OnClassOfServiceUpdated();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::SetIncremental(bool inFlag) {
+  bool previous = mClassOfService.Incremental();
+  mClassOfService.SetIncremental(inFlag);
+  if (previous != mClassOfService.Incremental()) {
+    OnClassOfServiceUpdated();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::SetClassOfService(ClassOfService cos) {
+  ClassOfService previous = mClassOfService;
+  mClassOfService = cos;
+  if (previous != mClassOfService) {
+    OnClassOfServiceUpdated();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::AddClassFlags(uint32_t inFlags) {
+  uint32_t previous = mClassOfService.Flags();
+  mClassOfService.SetFlags(inFlags | mClassOfService.Flags());
+  if (previous != mClassOfService.Flags()) {
+    OnClassOfServiceUpdated();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::ClearClassFlags(uint32_t inFlags) {
+  uint32_t previous = mClassOfService.Flags();
+  mClassOfService.SetFlags(~inFlags & mClassOfService.Flags());
+  if (previous != mClassOfService.Flags()) {
+    OnClassOfServiceUpdated();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::ResumeAt(uint64_t aStartPos, const nsACString& aEntityID) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+void TRRServiceChannel::DoAsyncAbort(nsresult aStatus) {
+  Unused << AsyncAbort(aStatus);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetProxyInfo(nsIProxyInfo** result) {
+  if (!mConnectionInfo) {
+    *result = do_AddRef(mProxyInfo).take();
+  } else {
+    *result = do_AddRef(mConnectionInfo->ProxyInfo()).take();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP TRRServiceChannel::GetHttpProxyConnectResponseCode(
+    int32_t* aResponseCode) {
+  NS_ENSURE_ARG_POINTER(aResponseCode);
+
+  *aResponseCode = -1;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetLoadFlags(nsLoadFlags* aLoadFlags) {
+  return HttpBaseChannel::GetLoadFlags(aLoadFlags);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::SetLoadFlags(nsLoadFlags aLoadFlags) {
+  if (aLoadFlags & (nsICachingChannel::LOAD_ONLY_FROM_CACHE | LOAD_FROM_CACHE |
+                    nsICachingChannel::LOAD_NO_NETWORK_IO)) {
+    MOZ_ASSERT(false, "Wrong load flags!");
+    return NS_ERROR_FAILURE;
+  }
+
+  return HttpBaseChannel::SetLoadFlags(aLoadFlags);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetURI(nsIURI** aURI) {
+  return HttpBaseChannel::GetURI(aURI);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetNotificationCallbacks(
+    nsIInterfaceRequestor** aCallbacks) {
+  return HttpBaseChannel::GetNotificationCallbacks(aCallbacks);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetLoadGroup(nsILoadGroup** aLoadGroup) {
+  return HttpBaseChannel::GetLoadGroup(aLoadGroup);
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetRequestMethod(nsACString& aMethod) {
+  return HttpBaseChannel::GetRequestMethod(aMethod);
+}
+
+void TRRServiceChannel::DoNotifyListener() {
+  LOG(("TRRServiceChannel::DoNotifyListener this=%p", this));
+
+  // In case nsHttpChannel::OnStartRequest wasn't called (e.g. due to flag
+  // LOAD_ONLY_IF_MODIFIED) we want to set AfterOnStartRequestBegun to true
+  // before notifying listener.
+  if (!LoadAfterOnStartRequestBegun()) {
+    StoreAfterOnStartRequestBegun(true);
+  }
+
+  if (mListener && !LoadOnStartRequestCalled()) {
+    nsCOMPtr<nsIStreamListener> listener = mListener;
+    StoreOnStartRequestCalled(true);
+    listener->OnStartRequest(this);
+  }
+  StoreOnStartRequestCalled(true);
+
+  // Make sure IsPending is set to false. At this moment we are done from
+  // the point of view of our consumer and we have to report our self
+  // as not-pending.
+  StoreIsPending(false);
+
+  if (mListener && !LoadOnStopRequestCalled()) {
+    nsCOMPtr<nsIStreamListener> listener = mListener;
+    StoreOnStopRequestCalled(true);
+    listener->OnStopRequest(this, mStatus);
+  }
+  StoreOnStopRequestCalled(true);
+
+  // We have to make sure to drop the references to listeners and callbacks
+  // no longer needed.
+  ReleaseListeners();
+
+  DoNotifyListenerCleanup();
+}
+
+void TRRServiceChannel::DoNotifyListenerCleanup() {}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetDomainLookupStart(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetDomainLookupStart();
+  } else {
+    *_retval = mTransactionTimings.domainLookupStart;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetDomainLookupEnd(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetDomainLookupEnd();
+  } else {
+    *_retval = mTransactionTimings.domainLookupEnd;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetConnectStart(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetConnectStart();
+  } else {
+    *_retval = mTransactionTimings.connectStart;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetTcpConnectEnd(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetTcpConnectEnd();
+  } else {
+    *_retval = mTransactionTimings.tcpConnectEnd;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetSecureConnectionStart(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetSecureConnectionStart();
+  } else {
+    *_retval = mTransactionTimings.secureConnectionStart;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetConnectEnd(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetConnectEnd();
+  } else {
+    *_retval = mTransactionTimings.connectEnd;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetRequestStart(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetRequestStart();
+  } else {
+    *_retval = mTransactionTimings.requestStart;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetResponseStart(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetResponseStart();
+  } else {
+    *_retval = mTransactionTimings.responseStart;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::GetResponseEnd(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetResponseEnd();
+  } else {
+    *_retval = mTransactionTimings.responseEnd;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP TRRServiceChannel::SetLoadGroup(nsILoadGroup* aLoadGroup) {
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+TRRServiceChannel::TimingAllowCheck(nsIPrincipal* aOrigin, bool* aResult) {
+  NS_ENSURE_ARG_POINTER(aResult);
+  *aResult = true;
+  return NS_OK;
+}
+
+bool TRRServiceChannel::SameOriginWithOriginalUri(nsIURI* aURI) { return true; }
+
+}  // namespace mozilla::net