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      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/power_monitor/power_observer.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::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   // Forces an alternate protocol of SPDY/2 on port 443.
     40   // TODO(rch): eliminate this method.
     41   static void ForceAlternateProtocol();
     42 
     43   // HttpTransactionFactory methods:
     44   virtual int CreateTransaction(RequestPriority priority,
     45                                 scoped_ptr<HttpTransaction>* trans,
     46                                 HttpTransactionDelegate* delegate) OVERRIDE;
     47   virtual HttpCache* GetCache() OVERRIDE;
     48   virtual HttpNetworkSession* GetSession() OVERRIDE;
     49 
     50   // base::PowerObserver methods:
     51   virtual void OnSuspend() OVERRIDE;
     52   virtual void OnResume() OVERRIDE;
     53 
     54  private:
     55   const scoped_refptr<HttpNetworkSession> session_;
     56   bool suspended_;
     57 };
     58 
     59 }  // namespace net
     60 
     61 #endif  // NET_HTTP_HTTP_NETWORK_LAYER_H_
     62