preconnect.h revision c407dc5cd9bdc5668497f21b26b09d988ab439de 
1// Copyright (c) 2006-2010 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.
4
5// A Preconnect instance maintains state while a TCP/IP connection is made, and
6// and then released into the pool of available connections for future use.
7
8#ifndef CHROME_BROWSER_NET_PRECONNECT_H_
9#define CHROME_BROWSER_NET_PRECONNECT_H_
10
11#include "base/ref_counted.h"
12#include "net/base/completion_callback.h"
13#include "net/base/host_port_pair.h"
14#include "net/socket/client_socket_handle.h"
15#include "net/socket/tcp_client_socket_pool.h"
16#include "net/url_request/url_request_context.h"
17
18namespace chrome_browser_net {
19
20class Preconnect : public net::CompletionCallback {
21 public:
22  static bool PreconnectOnUIThread(const GURL& url);
23
24  static void PreconnectOnIOThread(const GURL& url);
25
26  static void SetPreconnectDespiteProxy(bool status) {
27    preconnect_despite_proxy_ = status;
28  }
29
30 private:
31  Preconnect() {}
32
33  // Supply an instance that could have been used in an IO callback, but will
34  // never actually be used (because we reset the connection so quickly).
35  static Preconnect* callback_instance_;
36
37  // IO Callback which whould be performed when the connection is established.
38  virtual void RunWithParams(const Tuple1<int>& params);
39
40  // Preconnections are currently conservative, and do nothing if there is a
41  // chance that a proxy may be used.  This boolean allows proxy settings to
42  // be ignored (presumably because a user knows that the proxy won't be doing
43  // much work anway).
44  static bool preconnect_despite_proxy_;
45
46  DISALLOW_COPY_AND_ASSIGN(Preconnect);
47};
48}  // chrome_browser_net
49
50#endif  // CHROME_BROWSER_NET_PRECONNECT_H_
51