content/browser/renderer_host/pepper/pepper_network_proxy_host.h

   1 // Copyright (c) 2013 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 CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_NETWORK_PROXY_HOST_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_NETWORK_PROXY_HOST_H_
   7
   8 #include <queue>
   9 #include <string>
  10
  11 #include "base/compiler_specific.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "content/common/content_export.h"
  14 #include "net/proxy/proxy_service.h"
  15 #include "ppapi/host/host_message_context.h"
  16 #include "ppapi/host/resource_host.h"
  17
  18 namespace net {
  19 class ProxyInfo;
  20 class URLRequestContextGetter;
  21 }
  22
  23 namespace ppapi {
  24 namespace host {
  25 struct ReplyMessageContext;
  26 }
  27 }
  28
  29 namespace content {
  30
  31 class BrowserPpapiHostImpl;
  32
  33 // The host for PPB_NetworkProxy. This class lives on the IO thread.
  34 class CONTENT_EXPORT PepperNetworkProxyHost : public ppapi::host::ResourceHost {
  35  public:
  36   PepperNetworkProxyHost(BrowserPpapiHostImpl* host,
  37                          PP_Instance instance,
  38                          PP_Resource resource);
  39
  40   ~PepperNetworkProxyHost() override;
  41
  42  private:
  43   // We retrieve the appropriate URLRequestContextGetter and whether this API
  44   // is allowed for the instance on the UI thread and pass those to
  45   // DidGetUIThreadData, which sets allowed_ and proxy_service_.
  46   struct UIThreadData {
  47     UIThreadData();
  48     ~UIThreadData();
  49     bool is_allowed;
  50     scoped_refptr<net::URLRequestContextGetter> context_getter;
  51   };
  52   static UIThreadData GetUIThreadDataOnUIThread(int render_process_id,
  53                                                 int render_frame_id,
  54                                                 bool is_external_plugin);
  55   void DidGetUIThreadData(const UIThreadData&);
  56
  57   // ResourceHost implementation.
  58   int32_t OnResourceMessageReceived(
  59       const IPC::Message& msg,
  60       ppapi::host::HostMessageContext* context) override;
  61
  62   int32_t OnMsgGetProxyForURL(ppapi::host::HostMessageContext* context,
  63                               const std::string& url);
  64
  65   // If we have a valid proxy_service_, send all messages in unsent_requests_.
  66   void TryToSendUnsentRequests();
  67
  68   void OnResolveProxyCompleted(ppapi::host::ReplyMessageContext context,
  69                                net::ProxyInfo* proxy_info,
  70                                int result);
  71   void SendFailureReply(int32_t error,
  72                         ppapi::host::ReplyMessageContext context);
  73
  74   // The following two members are invalid until we get some information from
  75   // the UI thread. However, these are only ever set or accessed on the IO
  76   // thread.
  77   net::ProxyService* proxy_service_;
  78   bool is_allowed_;
  79
  80   // True initially, but set to false once the values for proxy_service_ and
  81   // is_allowed_ have been set.
  82   bool waiting_for_ui_thread_data_;
  83
  84   // We have to get the URLRequestContextGetter from the UI thread before we
  85   // can retrieve proxy_service_. If we receive any calls for GetProxyForURL
  86   // before proxy_service_ is available, we save them in unsent_requests_.
  87   struct UnsentRequest {
  88     GURL url;
  89     ppapi::host::ReplyMessageContext reply_context;
  90   };
  91   std::queue<UnsentRequest> unsent_requests_;
  92
  93   // Requests awaiting a response from ProxyService. We need to store these so
  94   // that we can cancel them if we get destroyed.
  95   std::queue<net::ProxyService::PacRequest*> pending_requests_;
  96
  97   base::WeakPtrFactory<PepperNetworkProxyHost> weak_factory_;
  98
  99   DISALLOW_COPY_AND_ASSIGN(PepperNetworkProxyHost);
 100 };
 101
 102 }  // namespace content
 103
 104 #endif  // CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_NETWORK_PROXY_HOST_H_