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/basictypes.h"
11#include "base/compiler_specific.h"
12#include "base/memory/ref_counted.h"
13#include "base/memory/scoped_ptr.h"
14#include "base/power_monitor/power_observer.h"
15#include "base/threading/non_thread_safe.h"
16#include "net/base/net_export.h"
17#include "net/http/http_transaction_factory.h"
18
19namespace net {
20
21class HttpNetworkSession;
22
23class NET_EXPORT HttpNetworkLayer
24    : public HttpTransactionFactory,
25      public base::PowerObserver,
26      NON_EXPORTED_BASE(public base::NonThreadSafe) {
27 public:
28  // Construct a HttpNetworkLayer with an existing HttpNetworkSession which
29  // contains a valid ProxyService.
30  explicit HttpNetworkLayer(HttpNetworkSession* session);
31  virtual ~HttpNetworkLayer();
32
33  // Create a transaction factory that instantiate a network layer over an
34  // existing network session. Network session contains some valuable
35  // information (e.g. authentication data) that we want to share across
36  // multiple network layers. This method exposes the implementation details
37  // of a network layer, use this method with an existing network layer only
38  // when network session is shared.
39  static HttpTransactionFactory* CreateFactory(HttpNetworkSession* session);
40
41  // Forces an alternate protocol of SPDY/3 on port 443.
42  // TODO(rch): eliminate this method.
43  static void ForceAlternateProtocol();
44
45  // HttpTransactionFactory methods:
46  virtual int CreateTransaction(RequestPriority priority,
47                                scoped_ptr<HttpTransaction>* trans) OVERRIDE;
48  virtual HttpCache* GetCache() OVERRIDE;
49  virtual HttpNetworkSession* GetSession() OVERRIDE;
50
51  // base::PowerObserver methods:
52  virtual void OnSuspend() OVERRIDE;
53  virtual void OnResume() OVERRIDE;
54
55 private:
56  const scoped_refptr<HttpNetworkSession> session_;
57  bool suspended_;
58
59  DISALLOW_COPY_AND_ASSIGN(HttpNetworkLayer);
60};
61
62}  // namespace net
63
64#endif  // NET_HTTP_HTTP_NETWORK_LAYER_H_
65