http_network_layer.h revision 5821806d5e7f356e8fa4b058a389a808ea183019 
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.
4
5#ifndef NET_HTTP_HTTP_NETWORK_LAYER_H_
6#define NET_HTTP_HTTP_NETWORK_LAYER_H_
7
8#include <string>
9
10#include "base/memory/ref_counted.h"
11#include "base/memory/scoped_ptr.h"
12#include "base/system_monitor/system_monitor.h"
13#include "base/threading/non_thread_safe.h"
14#include "net/base/net_export.h"
15#include "net/http/http_transaction_factory.h"
16
17namespace net {
18
19class HttpNetworkSession;
20
21class NET_EXPORT HttpNetworkLayer
22    : public HttpTransactionFactory,
23      public base::SystemMonitor::PowerObserver,
24      NON_EXPORTED_BASE(public base::NonThreadSafe) {
25 public:
26  // Construct a HttpNetworkLayer with an existing HttpNetworkSession which
27  // contains a valid ProxyService.
28  explicit HttpNetworkLayer(HttpNetworkSession* session);
29  virtual ~HttpNetworkLayer();
30
31  // Create a transaction factory that instantiate a network layer over an
32  // existing network session. Network session contains some valuable
33  // information (e.g. authentication data) that we want to share across
34  // multiple network layers. This method exposes the implementation details
35  // of a network layer, use this method with an existing network layer only
36  // when network session is shared.
37  static HttpTransactionFactory* CreateFactory(HttpNetworkSession* session);
38
39  // Enable the spdy protocol.
40  // Without calling this function, SPDY is disabled.  The mode can be:
41  //   ""            : (default) SSL and compression are enabled, flow
42  //                   control disabled.
43  //   "no-ssl"      : disables SSL.
44  //   "no-compress" : disables compression.
45  //   "flow-control": enables flow control.
46  //   "none"        : disables both SSL and compression.
47  static void EnableSpdy(const std::string& mode);
48
49  // HttpTransactionFactory methods:
50  virtual int CreateTransaction(scoped_ptr<HttpTransaction>* trans,
51                                HttpTransactionDelegate* delegate) OVERRIDE;
52  virtual HttpCache* GetCache() OVERRIDE;
53  virtual HttpNetworkSession* GetSession() OVERRIDE;
54
55  // base::SystemMonitor::PowerObserver methods:
56  virtual void OnSuspend() OVERRIDE;
57  virtual void OnResume() OVERRIDE;
58
59 private:
60  const scoped_refptr<HttpNetworkSession> session_;
61  bool suspended_;
62};
63
64}  // namespace net
65
66#endif  // NET_HTTP_HTTP_NETWORK_LAYER_H_
67