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      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   virtual ~PepperNetworkProxyHost();
     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   virtual 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_
    105