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// Copyright (c) 2010 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 REMOTING_PROTOCOL_MESSAGE_READER_H_
#define REMOTING_PROTOCOL_MESSAGE_READER_H_
#include "base/callback.h"
#include "base/ref_counted.h"
#include "base/scoped_ptr.h"
#include "base/task.h"
#include "net/base/completion_callback.h"
#include "remoting/base/compound_buffer.h"
#include "remoting/protocol/message_decoder.h"
namespace net {
class IOBuffer;
class Socket;
} // namespace net
namespace remoting {
namespace protocol {
// MessageReader reads data from the socket asynchronously and calls
// callback for each message it receives
class MessageReader {
public:
typedef Callback1<CompoundBuffer*>::Type MessageReceivedCallback;
MessageReader();
virtual ~MessageReader();
// Initialize the MessageReader with a socket. If a message is received
// |callback| is called.
void Init(net::Socket* socket, MessageReceivedCallback* callback);
private:
void DoRead();
void OnRead(int result);
void HandleReadResult(int result);
void OnDataReceived(net::IOBuffer* data, int data_size);
net::Socket* socket_;
bool closed_;
scoped_refptr<net::IOBuffer> read_buffer_;
net::CompletionCallbackImpl<MessageReader> read_callback_;
MessageDecoder message_decoder_;
// Callback is called when a message is received.
scoped_ptr<MessageReceivedCallback> message_received_callback_;
};
template <class T>
class ProtobufMessageReader {
public:
typedef typename Callback1<T*>::Type MessageReceivedCallback;
ProtobufMessageReader() { };
~ProtobufMessageReader() { };
void Init(net::Socket* socket, MessageReceivedCallback* callback) {
message_received_callback_.reset(callback);
message_reader_.Init(
socket, NewCallback(this, &ProtobufMessageReader<T>::OnNewData));
}
private:
void OnNewData(CompoundBuffer* buffer) {
T* message = new T();
CompoundBufferInputStream stream(buffer);
bool ret = message->ParseFromZeroCopyStream(&stream);
if (!ret) {
delete message;
} else {
message_received_callback_->Run(message);
}
}
MessageReader message_reader_;
scoped_ptr<MessageReceivedCallback> message_received_callback_;
};
} // namespace protocol
} // namespace remoting
#endif // REMOTING_PROTOCOL_MESSAGE_READER_H_
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