remoting/host/setup/oauth_client.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 REMOTING_HOST_SETUP_OAUTH_CLIENT
   6 #define REMOTING_HOST_SETUP_OAUTH_CLIENT
   7
   8 #include <queue>
   9 #include <string>
  10
  11 #include "base/callback.h"
  12 #include "google_apis/gaia/gaia_oauth_client.h"
  13 #include "remoting/base/url_request_context.h"
  14
  15 namespace remoting {
  16
  17 // A wrapper around GaiaOAuthClient that provides a more convenient interface,
  18 // with queueing of requests and a callback rather than a delegate.
  19 class OAuthClient : public gaia::GaiaOAuthClient::Delegate {
  20  public:
  21   // Called when GetCredentialsFromAuthCode is completed, with the |user_email|
  22   // and |refresh_token| that correspond to the given |auth_code|, or with empty
  23   // strings on error.
  24   typedef base::Callback<void(
  25       const std::string& user_email,
  26       const std::string& refresh_token)> CompletionCallback;
  27
  28   OAuthClient(
  29       scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
  30
  31   virtual ~OAuthClient();
  32
  33   // Redeems |auth_code| using |oauth_client_info| to obtain |refresh_token| and
  34   // |access_token|, then uses the userinfo endpoint to obtain |user_email|.
  35   // Calls CompletionCallback with |user_email| and |refresh_token| when done,
  36   // or with empty strings on error.
  37   // If a request is received while another one is  being processed, it is
  38   // enqueued and processed after the first one is finished.
  39   void GetCredentialsFromAuthCode(
  40       const gaia::OAuthClientInfo& oauth_client_info,
  41       const std::string& auth_code,
  42       CompletionCallback on_done);
  43
  44   // gaia::GaiaOAuthClient::Delegate
  45   virtual void OnGetTokensResponse(const std::string& refresh_token,
  46                                  const std::string& access_token,
  47                                  int expires_in_seconds) OVERRIDE;
  48   virtual void OnRefreshTokenResponse(const std::string& access_token,
  49                                       int expires_in_seconds) OVERRIDE;
  50   virtual void OnGetUserEmailResponse(const std::string& user_email) OVERRIDE;
  51
  52   virtual void OnOAuthError() OVERRIDE;
  53   virtual void OnNetworkError(int response_code) OVERRIDE;
  54
  55  private:
  56   struct Request {
  57     Request(const gaia::OAuthClientInfo& oauth_client_info,
  58             const std::string& auth_code,
  59             CompletionCallback on_done);
  60     virtual ~Request();
  61     gaia::OAuthClientInfo oauth_client_info;
  62     std::string auth_code;
  63     CompletionCallback on_done;
  64   };
  65
  66   void SendResponse(const std::string& user_email,
  67                     const std::string& refresh_token);
  68
  69   std::queue<Request> pending_requests_;
  70   gaia::GaiaOAuthClient gaia_oauth_client_;
  71   std::string refresh_token_;
  72   CompletionCallback on_done_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(OAuthClient);
  75 };
  76
  77 }  // namespace remoting
  78
  79 #endif  // REMOTING_HOST_SETUP_OAUTH_CLIENT