gecko-dev/netwerk/base/SimpleChannel.cpp

163 строки
4.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "SimpleChannel.h"
#include "nsBaseChannel.h"
#include "nsIChannel.h"
#include "nsIChildChannel.h"
#include "nsIInputStream.h"
#include "nsIRequest.h"
#include "nsISupportsImpl.h"
#include "nsNetUtil.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/net/NeckoChild.h"
#include "mozilla/net/PSimpleChannelChild.h"
namespace mozilla {
namespace net {
class SimpleChannel : public nsBaseChannel {
public:
explicit SimpleChannel(UniquePtr<SimpleChannelCallbacks>&& aCallbacks);
protected:
virtual ~SimpleChannel() = default;
virtual nsresult OpenContentStream(bool async, nsIInputStream** streamOut,
nsIChannel** channel) override;
virtual nsresult BeginAsyncRead(nsIStreamListener* listener,
nsIRequest** request) override;
private:
UniquePtr<SimpleChannelCallbacks> mCallbacks;
};
SimpleChannel::SimpleChannel(UniquePtr<SimpleChannelCallbacks>&& aCallbacks)
: mCallbacks(std::move(aCallbacks)) {
EnableSynthesizedProgressEvents(true);
}
nsresult SimpleChannel::OpenContentStream(bool async,
nsIInputStream** streamOut,
nsIChannel** channel) {
NS_ENSURE_TRUE(mCallbacks, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsIInputStream> stream;
MOZ_TRY_VAR(stream, mCallbacks->OpenContentStream(async, this));
MOZ_ASSERT(stream);
mCallbacks = nullptr;
*channel = nullptr;
stream.forget(streamOut);
return NS_OK;
}
nsresult SimpleChannel::BeginAsyncRead(nsIStreamListener* listener,
nsIRequest** request) {
NS_ENSURE_TRUE(mCallbacks, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsIRequest> req;
MOZ_TRY_VAR(req, mCallbacks->StartAsyncRead(listener, this));
mCallbacks = nullptr;
req.forget(request);
return NS_OK;
}
class SimpleChannelChild final : public SimpleChannel,
public nsIChildChannel,
public PSimpleChannelChild {
public:
explicit SimpleChannelChild(UniquePtr<SimpleChannelCallbacks>&& aCallbacks);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSICHILDCHANNEL
protected:
virtual void ActorDestroy(ActorDestroyReason why) override;
private:
virtual ~SimpleChannelChild() = default;
void AddIPDLReference();
RefPtr<SimpleChannelChild> mIPDLRef;
};
NS_IMPL_ISUPPORTS_INHERITED(SimpleChannelChild, SimpleChannel, nsIChildChannel)
SimpleChannelChild::SimpleChannelChild(
UniquePtr<SimpleChannelCallbacks>&& aCallbacks)
: SimpleChannel(std::move(aCallbacks)), mIPDLRef(nullptr) {}
NS_IMETHODIMP
SimpleChannelChild::ConnectParent(uint32_t aId) {
MOZ_ASSERT(NS_IsMainThread());
mozilla::dom::ContentChild* cc =
static_cast<mozilla::dom::ContentChild*>(gNeckoChild->Manager());
if (cc->IsShuttingDown()) {
return NS_ERROR_FAILURE;
}
if (!gNeckoChild->SendPSimpleChannelConstructor(this, aId)) {
return NS_ERROR_FAILURE;
}
// IPC now has a ref to us.
mIPDLRef = this;
return NS_OK;
}
NS_IMETHODIMP
SimpleChannelChild::CompleteRedirectSetup(nsIStreamListener* aListener,
nsISupports* aContext) {
if (mIPDLRef) {
MOZ_ASSERT(NS_IsMainThread());
}
nsresult rv;
MOZ_ASSERT(!aContext, "aContext should be null!");
rv = AsyncOpen(aListener);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (mIPDLRef) {
Unused << Send__delete__(this);
}
return NS_OK;
}
void SimpleChannelChild::ActorDestroy(ActorDestroyReason why) {
MOZ_ASSERT(mIPDLRef);
mIPDLRef = nullptr;
}
already_AddRefed<nsIChannel> NS_NewSimpleChannelInternal(
nsIURI* aURI, nsILoadInfo* aLoadInfo,
UniquePtr<SimpleChannelCallbacks>&& aCallbacks) {
RefPtr<SimpleChannel> chan;
if (IsNeckoChild()) {
chan = new SimpleChannelChild(std::move(aCallbacks));
} else {
chan = new SimpleChannel(std::move(aCallbacks));
}
chan->SetURI(aURI);
MOZ_ALWAYS_SUCCEEDS(chan->SetLoadInfo(aLoadInfo));
return chan.forget();
}
} // namespace net
} // namespace mozilla