зеркало из https://github.com/mozilla/gecko-dev.git
95 строки
2.4 KiB
C++
95 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsBaseChannel.h"
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#include "nsIInputStream.h"
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#include "nsIRequest.h"
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#include "SimpleChannel.h"
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namespace mozilla {
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namespace net {
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// Like MOZ_TRY, but returns the unwrapped error value rather than a
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// GenericErrorResult on failure.
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#define TRY_VAR(target, expr) \
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do { \
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auto result = (expr); \
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if (result.isErr()) { \
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return result.unwrapErr(); \
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} \
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(target) = result.unwrap(); \
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} while (0)
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class SimpleChannel final : public nsBaseChannel
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{
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public:
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explicit SimpleChannel(UniquePtr<SimpleChannelCallbacks>&& aCallbacks);
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protected:
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virtual ~SimpleChannel() {}
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virtual nsresult OpenContentStream(bool async, nsIInputStream **streamOut,
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nsIChannel** channel) override;
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virtual nsresult BeginAsyncRead(nsIStreamListener* listener,
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nsIRequest** request) override;
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private:
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UniquePtr<SimpleChannelCallbacks> mCallbacks;
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};
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SimpleChannel::SimpleChannel(UniquePtr<SimpleChannelCallbacks>&& aCallbacks)
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: mCallbacks(Move(aCallbacks))
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{
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EnableSynthesizedProgressEvents(true);
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}
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nsresult
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SimpleChannel::OpenContentStream(bool async, nsIInputStream **streamOut, nsIChannel** channel)
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{
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NS_ENSURE_TRUE(mCallbacks, NS_ERROR_UNEXPECTED);
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nsCOMPtr<nsIInputStream> stream;
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TRY_VAR(stream, mCallbacks->OpenContentStream(async, this));
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MOZ_ASSERT(stream);
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mCallbacks = nullptr;
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*channel = nullptr;
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stream.forget(streamOut);
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return NS_OK;
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}
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nsresult
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SimpleChannel::BeginAsyncRead(nsIStreamListener* listener, nsIRequest** request)
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{
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NS_ENSURE_TRUE(mCallbacks, NS_ERROR_UNEXPECTED);
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nsCOMPtr<nsIRequest> req;
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TRY_VAR(req, mCallbacks->StartAsyncRead(listener, this));
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mCallbacks = nullptr;
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req.forget(request);
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return NS_OK;
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}
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#undef TRY_VAR
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already_AddRefed<nsIChannel>
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NS_NewSimpleChannelInternal(nsIURI* aURI, nsILoadInfo* aLoadInfo, UniquePtr<SimpleChannelCallbacks>&& aCallbacks)
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{
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RefPtr<SimpleChannel> chan = new SimpleChannel(Move(aCallbacks));
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chan->SetURI(aURI);
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MOZ_ALWAYS_SUCCEEDS(chan->SetLoadInfo(aLoadInfo));
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return chan.forget();
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}
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} // namespace net
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} // namespace mozilla
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