Quelle ParentProcessDocumentChannel.cpp Sprache: C

/* -*- 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 "ParentProcessDocumentChannel.h"

#include "mozilla/extensions/StreamFilterParent.h"
#include "mozilla/net/ParentChannelWrapper.h"
#include "mozilla/net/UrlClassifierCommon.h"
#include "mozilla/StaticPrefs_extensions.h"
#include "nsCRT.h"
#include "nsDocShell.h"
#include "nsIObserverService.h"
#include "nsIClassifiedChannel.h"
#include "nsIXULRuntime.h"
#include "nsHttpHandler.h"
#include "nsDocShellLoadState.h"

extern mozilla::LazyLogModule gDocumentChannelLog;
#define LOG(fmt) MOZ_LOG(gDocumentChannelLog, mozilla::LogLevel::Verbose, fmt)

namespace mozilla {
namespace net {

using RedirectToRealChannelPromise =
    typename PDocumentChannelParent::RedirectToRealChannelPromise;

NS_IMPL_ISUPPORTS_INHERITED(ParentProcessDocumentChannel, DocumentChannel,
                            nsIAsyncVerifyRedirectCallback, nsIObserver)

ParentProcessDocumentChannel::ParentProcessDocumentChannel(
    nsDocShellLoadState* aLoadState, class LoadInfo* aLoadInfo,
    nsLoadFlags aLoadFlags, uint32_t aCacheKey, bool aUriModified,
    bool aIsEmbeddingBlockedError)
    : DocumentChannel(aLoadState, aLoadInfo, aLoadFlags, aCacheKey,
                      aUriModified, aIsEmbeddingBlockedError) {
  LOG(("ParentProcessDocumentChannel ctor [this=%p]", this));
}

ParentProcessDocumentChannel::~ParentProcessDocumentChannel() {
  LOG(("ParentProcessDocumentChannel dtor [this=%p]", this));
}

RefPtr<RedirectToRealChannelPromise>
ParentProcessDocumentChannel::RedirectToRealChannel(
    nsTArray<ipc::Endpoint<extensions::PStreamFilterParent>>&&
        aStreamFilterEndpoints,
    uint32_t aRedirectFlags, uint32_t aLoadFlags,
    const nsTArray<EarlyHintConnectArgs>& aEarlyHints) {
  LOG(("ParentProcessDocumentChannel RedirectToRealChannel [this=%p]", this));
  nsCOMPtr<nsIChannel> channel = mDocumentLoadListener->GetChannel();
  channel->SetLoadFlags(aLoadFlags);
  channel->SetNotificationCallbacks(mCallbacks);

  if (mLoadGroup) {
    channel->SetLoadGroup(mLoadGroup);
  }

  if (XRE_IsE10sParentProcess()) {
    nsCOMPtr<nsIURI> uri;
    MOZ_ALWAYS_SUCCEEDS(NS_GetFinalChannelURI(channel, getter_AddRefs(uri)));
    if (!nsDocShell::CanLoadInParentProcess(uri)) {
      nsAutoCString msg;
      uri->GetSpec(msg);
      msg.Insert(
          "Attempt to load a non-authorised load in the parent process: ", 0);
      NS_ASSERTION(false, msg.get());
      return RedirectToRealChannelPromise::CreateAndResolve(
          NS_ERROR_CONTENT_BLOCKED, __func__);
    }
  }
  mStreamFilterEndpoints = std::move(aStreamFilterEndpoints);

  if (mDocumentLoadListener->IsDocumentLoad() &&
      mozilla::SessionHistoryInParent() && GetDocShell() &&
      mDocumentLoadListener->GetLoadingSessionHistoryInfo()) {
    GetDocShell()->SetLoadingSessionHistoryInfo(
        *mDocumentLoadListener->GetLoadingSessionHistoryInfo());
  }

  RefPtr<RedirectToRealChannelPromise> p = mPromise.Ensure(__func__);
  // We make the promise use direct task dispatch in order to reduce the number
  // of event loops iterations.
  mPromise.UseDirectTaskDispatch(__func__);

  nsresult rv =
      gHttpHandler->AsyncOnChannelRedirect(this, channel, aRedirectFlags);
  if (NS_FAILED(rv)) {
    LOG(
        ("ParentProcessDocumentChannel RedirectToRealChannel "
         "AsyncOnChannelRedirect failed [this=%p "
         "aRv=%d]",
         this, int(rv)));
    OnRedirectVerifyCallback(rv);
  }

  return p;
}

NS_IMETHODIMP
ParentProcessDocumentChannel::OnRedirectVerifyCallback(nsresult aResult) {
  LOG(
      ("ParentProcessDocumentChannel OnRedirectVerifyCallback [this=%p "
       "aResult=%d]",
       this, int(aResult)));

  MOZ_ASSERT(mDocumentLoadListener);

  if (NS_FAILED(aResult)) {
    Cancel(aResult);
  } else if (mCanceled) {
    aResult = NS_ERROR_ABORT;
  } else {
    const nsCOMPtr<nsIChannel> channel = mDocumentLoadListener->GetChannel();
    mLoadGroup->AddRequest(channel, nullptr);
    // Adding the channel to the loadgroup could have triggered a status
    // change with an observer being called destroying the docShell, resulting
    // in the PPDC to be canceled.
    if (mCanceled) {
      aResult = NS_ERROR_ABORT;
    } else {
      mLoadGroup->RemoveRequest(this, nullptr, NS_BINDING_REDIRECTED);
      for (auto& endpoint : mStreamFilterEndpoints) {
        extensions::StreamFilterParent::Attach(channel, std::move(endpoint));
      }

      RefPtr<ParentChannelWrapper> wrapper =
          new ParentChannelWrapper(channel, mListener);

      wrapper->Register(mDocumentLoadListener->GetRedirectChannelId());
    }
  }

  mPromise.Resolve(aResult, __func__);

  return NS_OK;
}

NS_IMETHODIMP ParentProcessDocumentChannel::AsyncOpen(
    nsIStreamListener* aListener) {
  LOG(("ParentProcessDocumentChannel AsyncOpen [this=%p]", this));
  auto docShell = RefPtr<nsDocShell>(GetDocShell());
  MOZ_ASSERT(docShell);

  bool isDocumentLoad = mLoadInfo->GetExternalContentPolicyType() !=
                        ExtContentPolicy::TYPE_OBJECT;

  mDocumentLoadListener = MakeRefPtr<DocumentLoadListener>(
      docShell->GetBrowsingContext()->Canonical(), isDocumentLoad);
  LOG(("Created PPDocumentChannel with listener=%p",
       mDocumentLoadListener.get()));

  // Add observers.
  nsCOMPtr<nsIObserverService> observerService =
      mozilla::services::GetObserverService();
  if (observerService) {
    MOZ_ALWAYS_SUCCEEDS(observerService->AddObserver(
        this, NS_HTTP_ON_MODIFY_REQUEST_TOPIC, false));
  }

  gHttpHandler->OnOpeningDocumentRequest(this);

  if (isDocumentLoad) {
    // Return value of setting synced field should be checked. See bug 1656492.
    Unused << GetDocShell()->GetBrowsingContext()->SetCurrentLoadIdentifier(
        Some(mLoadState->GetLoadIdentifier()));
  }

  nsresult rv = NS_OK;
  Maybe<dom::ClientInfo> initialClientInfo = mInitialClientInfo;

  RefPtr<DocumentLoadListener::OpenPromise> promise;
  if (isDocumentLoad) {
    promise = mDocumentLoadListener->OpenDocument(
        mLoadState, mLoadFlags, mCacheKey, Some(mChannelId), TimeStamp::Now(),
        mTiming, std::move(initialClientInfo), mUriModified,
        Some(mIsEmbeddingBlockedError), nullptr /* ContentParent */, &rv);
  } else {
    promise = mDocumentLoadListener->OpenObject(
        mLoadState, mCacheKey, Some(mChannelId), TimeStamp::Now(), mTiming,
        std::move(initialClientInfo), InnerWindowIDForExtantDoc(docShell),
        mLoadFlags, mLoadInfo->InternalContentPolicyType(),
        dom::UserActivation::IsHandlingUserInput(), nullptr /* ContentParent */,
        nullptr /* ObjectUpgradeHandler */, &rv);
  }

  if (NS_FAILED(rv)) {
    MOZ_ASSERT(!promise);
    mDocumentLoadListener = nullptr;
    RemoveObserver();
    return rv;
  }

  mListener = aListener;
  if (mLoadGroup) {
    mLoadGroup->AddRequest(this, nullptr);
  }

  RefPtr<ParentProcessDocumentChannel> self = this;
  promise->Then(
      GetCurrentSerialEventTarget(), __func__,
      [self](DocumentLoadListener::OpenPromiseSucceededType&& aResolveValue) {
        self->mDocumentLoadListener->CancelEarlyHintPreloads();
        nsTArray<EarlyHintConnectArgs> earlyHints;

        // The DLL is waiting for us to resolve the
        // RedirectToRealChannelPromise given as parameter.
        RefPtr<RedirectToRealChannelPromise> p =
            self->RedirectToRealChannel(
                    std::move(aResolveValue.mStreamFilterEndpoints),
                    aResolveValue.mRedirectFlags, aResolveValue.mLoadFlags,
                    earlyHints)
                ->Then(
                    GetCurrentSerialEventTarget(), __func__,
                    [self](RedirectToRealChannelPromise::ResolveOrRejectValue&&
                               aValue) -> RefPtr<RedirectToRealChannelPromise> {
                      MOZ_ASSERT(aValue.IsResolve());
                      nsresult rv = aValue.ResolveValue();
                      if (NS_FAILED(rv)) {
                        self->DisconnectChildListeners(rv, rv);
                      }
                      self->mLoadGroup = nullptr;
                      self->mListener = nullptr;
                      self->mCallbacks = nullptr;
                      self->RemoveObserver();
                      auto p =
                          MakeRefPtr<RedirectToRealChannelPromise::Private>(
                              __func__);
                      p->UseDirectTaskDispatch(__func__);
                      p->ResolveOrReject(std::move(aValue), __func__);
                      return p;
                    });
        // We chain the promise the DLL is waiting on to the one returned by
        // RedirectToRealChannel. As soon as the promise returned is
        // resolved or rejected, so will the DLL's promise.
        p->ChainTo(aResolveValue.mPromise.forget(), __func__);
      },
      [self](DocumentLoadListener::OpenPromiseFailedType&& aRejectValue) {
        // If this is a normal failure, then we want to disconnect our listeners
        // and notify them of the failure. If this is a process switch, then we
        // can just ignore it silently, and trust that the switch will shut down
        // our docshell and cancel us when it's ready.
        if (!aRejectValue.mContinueNavigating) {
          self->DisconnectChildListeners(aRejectValue.mStatus,
                                         aRejectValue.mLoadGroupStatus);
        }
        self->RemoveObserver();
      });
  return NS_OK;
}

NS_IMETHODIMP ParentProcessDocumentChannel::Cancel(nsresult aStatus) {
  return CancelWithReason(aStatus, "ParentProcessDocumentChannel::Cancel"_ns);
}

NS_IMETHODIMP ParentProcessDocumentChannel::CancelWithReason(
    nsresult aStatusCode, const nsACString& aReason) {
  LOG(("ParentProcessDocumentChannel CancelWithReason [this=%p]", this));
  if (mCanceled) {
    return NS_OK;
  }

  mCanceled = true;
  // This will force the DocumentListener to abort the promise if there's one
  // pending.
  mDocumentLoadListener->Cancel(aStatusCode, aReason);

  return NS_OK;
}

void ParentProcessDocumentChannel::RemoveObserver() {
  if (nsCOMPtr<nsIObserverService> observerService =
          mozilla::services::GetObserverService()) {
    observerService->RemoveObserver(this, NS_HTTP_ON_MODIFY_REQUEST_TOPIC);
  }
}

////////////////////////////////////////////////////////////////////////////////
// nsIObserver
////////////////////////////////////////////////////////////////////////////////

NS_IMETHODIMP
ParentProcessDocumentChannel::Observe(nsISupports* aSubject, const char* aTopic,
                                      const char16_t* aData) {
  MOZ_ASSERT(NS_IsMainThread());

  if (mRequestObserversCalled) {
    // We have already emitted the event, we don't want to emit it again.
    // We only care about forwarding the first NS_HTTP_ON_MODIFY_REQUEST_TOPIC
    // encountered.
    return NS_OK;
  }
  nsCOMPtr<nsIChannel> channel = do_QueryInterface(aSubject);
  if (!channel || mDocumentLoadListener->GetChannel() != channel) {
    // Not a channel we are interested with.
    return NS_OK;
  }
  LOG(("DocumentChannelParent Observe [this=%p aChannel=%p]", this,
       channel.get()));
  if (!nsCRT::strcmp(aTopic, NS_HTTP_ON_MODIFY_REQUEST_TOPIC)) {
    mRequestObserversCalled = true;
    gHttpHandler->OnModifyDocumentRequest(this);
  }

  return NS_OK;
}

}  // namespace net
}  // namespace mozilla

#undef LOG

quality98%

¤ Dauer der Verarbeitung: 0.15 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.