1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "remoting/protocol/message_reader.h"
8 #include "base/callback.h"
9 #include "base/compiler_specific.h"
10 #include "base/location.h"
11 #include "base/thread_task_runner_handle.h"
12 #include "base/single_thread_task_runner.h"
13 #include "net/base/io_buffer.h"
14 #include "net/base/net_errors.h"
15 #include "net/socket/socket.h"
16 #include "remoting/base/compound_buffer.h"
17 #include "remoting/proto/internal.pb.h"
22 static const int kReadBufferSize = 4096;
24 MessageReader::MessageReader()
32 void MessageReader::Init(net::Socket* socket,
33 const MessageReceivedCallback& callback) {
34 DCHECK(CalledOnValidThread());
35 message_received_callback_ = callback;
41 MessageReader::~MessageReader() {
44 void MessageReader::DoRead() {
45 DCHECK(CalledOnValidThread());
46 // Don't try to read again if there is another read pending or we
47 // have messages that we haven't finished processing yet.
48 while (!closed_ && !read_pending_ && pending_messages_ == 0) {
49 read_buffer_ = new net::IOBuffer(kReadBufferSize);
50 int result = socket_->Read(
53 base::Bind(&MessageReader::OnRead, weak_factory_.GetWeakPtr()));
54 HandleReadResult(result);
58 void MessageReader::OnRead(int result) {
59 DCHECK(CalledOnValidThread());
60 DCHECK(read_pending_);
61 read_pending_ = false;
64 HandleReadResult(result);
69 void MessageReader::HandleReadResult(int result) {
70 DCHECK(CalledOnValidThread());
75 OnDataReceived(read_buffer_.get(), result);
76 } else if (result == net::ERR_IO_PENDING) {
79 if (result != net::ERR_CONNECTION_CLOSED) {
80 LOG(ERROR) << "Read() returned error " << result;
82 // Stop reading after any error.
87 void MessageReader::OnDataReceived(net::IOBuffer* data, int data_size) {
88 DCHECK(CalledOnValidThread());
89 message_decoder_.AddData(data, data_size);
91 // Get list of all new messages first, and then call the callback
94 CompoundBuffer* buffer = message_decoder_.GetNextMessage();
98 base::ThreadTaskRunnerHandle::Get()->PostTask(
100 base::Bind(&MessageReader::RunCallback,
101 weak_factory_.GetWeakPtr(),
102 base::Passed(make_scoped_ptr(buffer))));
106 void MessageReader::RunCallback(scoped_ptr<CompoundBuffer> message) {
107 message_received_callback_.Run(
108 message.Pass(), base::Bind(&MessageReader::OnMessageDone,
109 weak_factory_.GetWeakPtr()));
112 void MessageReader::OnMessageDone() {
113 DCHECK(CalledOnValidThread());
115 DCHECK_GE(pending_messages_, 0);
117 // Start next read if necessary.
121 } // namespace protocol
122 } // namespace remoting