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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_TESTING_REPLAYING_BYTES_CONSUMER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_TESTING_REPLAYING_BYTES_CONSUMER_H_
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/platform/loader/fetch/bytes_consumer.h"
#include "third_party/blink/renderer/platform/wtf/deque.h"
namespace base {
class SingleThreadTaskRunner;
} // namespace base
namespace blink {
// ReplayingBytesConsumer stores commands via |add| and replays the stored
// commands when read.
class ReplayingBytesConsumer final : public BytesConsumer {
public:
class Command final {
DISALLOW_NEW();
public:
enum Name {
kData,
kDone,
kError,
kWait,
kDataAndDone,
};
explicit Command(Name name) : name_(name) {}
Command(Name name, const Vector<char>& body) : name_(name), body_(body) {}
Command(Name name, const char* body, wtf_size_t size) : name_(name) {
body_.Append(body, size);
}
Command(Name name, const char* body)
: Command(name, body, static_cast<wtf_size_t>(strlen(body))) {}
Name GetName() const { return name_; }
const Vector<char>& Body() const { return body_; }
private:
const Name name_;
Vector<char> body_;
};
explicit ReplayingBytesConsumer(scoped_refptr<base::SingleThreadTaskRunner>);
~ReplayingBytesConsumer() override;
// Add a command to this handle. This function must be called BEFORE
// any BytesConsumer methods are called.
void Add(const Command& command) { commands_.push_back(command); }
Result BeginRead(const char** buffer, size_t* available) override;
Result EndRead(size_t read_size) override;
void SetClient(Client*) override;
void ClearClient() override;
void Cancel() override;
PublicState GetPublicState() const override;
Error GetError() const override;
String DebugName() const override { return "ReplayingBytesConsumer"; }
bool IsCancelled() const { return is_cancelled_; }
void Trace(Visitor*) override;
private:
void NotifyAsReadable(int notification_token);
void Close();
void MakeErrored(const Error&);
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
Member<BytesConsumer::Client> client_;
InternalState state_ = InternalState::kWaiting;
Deque<Command> commands_;
size_t offset_ = 0;
BytesConsumer::Error error_;
int notification_token_ = 0;
bool is_cancelled_ = false;
bool is_in_two_phase_read_ = false;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_TESTING_REPLAYING_BYTES_CONSUMER_H_
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