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/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
  17 namespace net {
  18
  19 class HttpNetworkSession;
  20
  21 class 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_