content/renderer/media/webrtc_identity_service.h

   1 // Copyright 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_RENDERER_MEDIA_WEBRTC_IDENTITY_SERVICE_H_
   6 #define CONTENT_RENDERER_MEDIA_WEBRTC_IDENTITY_SERVICE_H_
   7
   8 #include <deque>
   9 #include <string>
  10
  11 #include "base/basictypes.h"
  12 #include "base/callback.h"
  13 #include "content/common/content_export.h"
  14 #include "content/public/renderer/render_process_observer.h"
  15 #include "url/gurl.h"
  16
  17 namespace content {
  18
  19 // This class handles WebRTC DTLS identity requests by sending IPC messages to
  20 // the browser process. Only one request is sent to the browser at a time; other
  21 // requests are queued and have to wait for the outstanding request to complete.
  22 class CONTENT_EXPORT WebRTCIdentityService : public RenderProcessObserver {
  23  public:
  24   typedef base::Callback<
  25       void(const std::string& certificate, const std::string& private_key)>
  26       SuccessCallback;
  27
  28   typedef base::Callback<void(int error)> FailureCallback;
  29
  30   WebRTCIdentityService();
  31   virtual ~WebRTCIdentityService();
  32
  33   // Sends an identity request.
  34   //
  35   // |origin| is the origin of the caller;
  36   // |identity_name| and |common_name| have the same meaning as in
  37   // webrtc::DTLSIdentityServiceInterface::RequestIdentity;
  38   // |success_callback| is the callback if the identity is successfully
  39   // returned;
  40   // |failure_callback| is the callback if the identity request fails.
  41   //
  42   // The request id is returned. It's unique within the renderer and can be used
  43   // to cancel the request.
  44   int RequestIdentity(const GURL& origin,
  45                       const std::string& identity_name,
  46                       const std::string& common_name,
  47                       const SuccessCallback& success_callback,
  48                       const FailureCallback& failure_callback);
  49
  50   // Cancels a previous request and the callbacks will not be called.
  51   // If the |request_id| is not associated with the
  52   // outstanding request or any queued request, this method does nothing.
  53   //
  54   // |request_id| is the request id returned from RequestIdentity.
  55   void CancelRequest(int request_id);
  56
  57  protected:
  58   // For unittest to override.
  59   virtual bool Send(IPC::Message* message);
  60   // RenderProcessObserver implementation. Protected for testing.
  61   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
  62
  63  private:
  64   struct RequestInfo {
  65     RequestInfo(int request_id,
  66                 const GURL& origin,
  67                 const std::string& identity_name,
  68                 const std::string& common_name,
  69                 const SuccessCallback& success_callback,
  70                 const FailureCallback& failure_callback);
  71     ~RequestInfo();
  72
  73     int request_id;
  74     GURL origin;
  75     std::string identity_name;
  76     std::string common_name;
  77     SuccessCallback success_callback;
  78     FailureCallback failure_callback;
  79   };
  80
  81   // IPC message handlers.
  82   void OnIdentityReady(int request_id,
  83                        const std::string& certificate,
  84                        const std::string& private_key);
  85   void OnRequestFailed(int request_id, int error);
  86
  87   void SendRequest(const RequestInfo& request_info);
  88   void OnOutstandingRequestReturned();
  89
  90   std::deque<RequestInfo> pending_requests_;
  91   int next_request_id_;
  92
  93   DISALLOW_COPY_AND_ASSIGN(WebRTCIdentityService);
  94 };
  95
  96 }  // namespace content
  97
  98 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_IDENTITY_SERVICE_H_