1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
// Copyright (c) 2009 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 NET_WEBSOCKETS_WEBSOCKET_THROTTLE_H_
#define NET_WEBSOCKETS_WEBSOCKET_THROTTLE_H_
#include "base/hash_tables.h"
#include "base/singleton.h"
#include "net/socket_stream/socket_stream_throttle.h"
namespace net {
// SocketStreamThrottle for WebSocket protocol.
// Implements the client-side requirements in the spec.
// http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol
// 4.1 Handshake
// 1. If the user agent already has a Web Socket connection to the
// remote host (IP address) identified by /host/, even if known by
// another name, wait until that connection has been established or
// for that connection to have failed.
class WebSocketThrottle : public SocketStreamThrottle {
public:
virtual int OnStartOpenConnection(SocketStream* socket,
CompletionCallback* callback);
virtual int OnRead(SocketStream* socket, const char* data, int len,
CompletionCallback* callback);
virtual int OnWrite(SocketStream* socket, const char* data, int len,
CompletionCallback* callback);
virtual void OnClose(SocketStream* socket);
static void Init();
private:
class WebSocketState;
typedef std::deque<WebSocketState*> ConnectingQueue;
typedef base::hash_map<std::string, ConnectingQueue*> ConnectingAddressMap;
WebSocketThrottle();
virtual ~WebSocketThrottle();
friend struct DefaultSingletonTraits<WebSocketThrottle>;
// Puts |socket| in |queue_| and queues for the destination addresses
// of |socket|. Also sets |state| as UserData of |socket|.
// If other socket is using the same destination address, set |state| waiting.
void PutInQueue(SocketStream* socket, WebSocketState* state);
// Removes |socket| from |queue_| and queues for the destination addresses
// of |socket|. Also releases |state| from UserData of |socket|.
void RemoveFromQueue(SocketStream* socket, WebSocketState* state);
// Checks sockets waiting in |queue_| and check the socket is the front of
// every queue for the destination addresses of |socket|.
// If so, the socket can resume estabilshing connection, so wake up
// the socket.
void WakeupSocketIfNecessary();
// Key: string of host's address. Value: queue of sockets for the address.
ConnectingAddressMap addr_map_;
// Queue of sockets for websockets in opening state.
ConnectingQueue queue_;
};
} // namespace net
#endif // NET_WEBSOCKETS_WEBSOCKET_THROTTLE_H_
|
