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 "base/memory/ref_counted.h"
  13 #include "google_apis/gaia/gaia_oauth_client.h"
  14 #include "net/url_request/url_request_context_getter.h"
  15
  16 namespace net {
  17 class URLRequestContext;
  18 }
  19
  20 namespace remoting {
  21
  22 // A wrapper around GaiaOAuthClient that provides a more convenient interface,
  23 // with queueing of requests and a callback rather than a delegate.
  24 class OAuthClient : public gaia::GaiaOAuthClient::Delegate {
  25  public:
  26   // Called when GetCredentialsFromAuthCode is completed, with the |user_email|
  27   // and |refresh_token| that correspond to the given |auth_code|, or with empty
  28   // strings on error.
  29   typedef base::Callback<void(
  30       const std::string& user_email,
  31       const std::string& refresh_token)> CompletionCallback;
  32
  33   OAuthClient(
  34       scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
  35
  36   virtual ~OAuthClient();
  37
  38   // Redeems |auth_code| using |oauth_client_info| to obtain |refresh_token| and
  39   // |access_token|, then uses the userinfo endpoint to obtain |user_email|.
  40   // Calls CompletionCallback with |user_email| and |refresh_token| when done,
  41   // or with empty strings on error.
  42   // If a request is received while another one is  being processed, it is
  43   // enqueued and processed after the first one is finished.
  44   void GetCredentialsFromAuthCode(
  45       const gaia::OAuthClientInfo& oauth_client_info,
  46       const std::string& auth_code,
  47       CompletionCallback on_done);
  48
  49   // gaia::GaiaOAuthClient::Delegate
  50   virtual void OnGetTokensResponse(const std::string& refresh_token,
  51                                  const std::string& access_token,
  52                                  int expires_in_seconds) OVERRIDE;
  53   virtual void OnRefreshTokenResponse(const std::string& access_token,
  54                                       int expires_in_seconds) OVERRIDE;
  55   virtual void OnGetUserEmailResponse(const std::string& user_email) OVERRIDE;
  56
  57   virtual void OnOAuthError() OVERRIDE;
  58   virtual void OnNetworkError(int response_code) OVERRIDE;
  59
  60  private:
  61   struct Request {
  62     Request(const gaia::OAuthClientInfo& oauth_client_info,
  63             const std::string& auth_code,
  64             CompletionCallback on_done);
  65     virtual ~Request();
  66     gaia::OAuthClientInfo oauth_client_info;
  67     std::string auth_code;
  68     CompletionCallback on_done;
  69   };
  70
  71   void SendResponse(const std::string& user_email,
  72                     const std::string& refresh_token);
  73
  74   std::queue<Request> pending_requests_;
  75   gaia::GaiaOAuthClient gaia_oauth_client_;
  76   std::string refresh_token_;
  77   CompletionCallback on_done_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(OAuthClient);
  80 };
  81
  82 }  // namespace remoting
  83
  84 #endif  // REMOTING_HOST_SETUP_OAUTH_CLIENT