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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/protocol/message_decoder.h"
namespace net {
class Socket;
} // namespace net
namespace remoting {
class ChromotocolConnection;
class ChromotingClientMessage;
class ChromotingHostMessage;
class MessageReader;
namespace internal {
template <class T>
class MessageReaderPrivate {
private:
friend class remoting::MessageReader;
typedef typename Callback1<T*>::Type MessageReceivedCallback;
MessageReaderPrivate(MessageReceivedCallback* callback)
: message_received_callback_(callback) {
}
~MessageReaderPrivate() { }
void OnDataReceived(net::IOBuffer* buffer, int data_size) {
typedef typename std::list<T*>::iterator MessageListIterator;
std::list<T*> message_list;
message_decoder_.ParseMessages(buffer, data_size, &message_list);
for (MessageListIterator it = message_list.begin();
it != message_list.end(); ++it) {
message_received_callback_->Run(*it);
}
}
void Destroy() {
delete this;
}
// Message decoder is used to decode bytes into protobuf message.
MessageDecoder message_decoder_;
// Callback is called when a message is received.
scoped_ptr<MessageReceivedCallback> message_received_callback_;
};
} // namespace internal
// MessageReader reads data from the socket asynchronously and uses
// MessageReaderPrivate to decode the data received.
class MessageReader {
public:
MessageReader();
virtual ~MessageReader();
// Stops reading. Must be called on the same thread as Init().
void Close();
// Initialize the MessageReader with a socket. If a message is received
// |callback| is called.
template <class T>
void Init(net::Socket* socket, typename Callback1<T*>::Type* callback) {
internal::MessageReaderPrivate<T>* reader =
new internal::MessageReaderPrivate<T>(callback);
data_received_callback_.reset(
::NewCallback(
reader, &internal::MessageReaderPrivate<T>::OnDataReceived));
destruction_callback_.reset(
::NewCallback(reader, &internal::MessageReaderPrivate<T>::Destroy));
Init(socket);
}
private:
void Init(net::Socket* socket);
void DoRead();
void OnRead(int result);
void HandleReadResult(int result);
net::Socket* socket_;
bool closed_;
scoped_refptr<net::IOBuffer> read_buffer_;
net::CompletionCallbackImpl<MessageReader> read_callback_;
scoped_ptr<Callback2<net::IOBuffer*, int>::Type> data_received_callback_;
scoped_ptr<Callback0::Type> destruction_callback_;
};
} // namespace remoting
#endif // REMOTING_PROTOCOL_MESSAGE_READER_H_
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