net/http/http_network_layer.h

   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
  19 namespace net {
  20
  21 class HttpNetworkSession;
  22
  23 class 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_