chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.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 CHROME_BROWSER_CHROMEOS_POLICY_POLICY_OAUTH2_TOKEN_FETCHER_H_
   6 #define CHROME_BROWSER_CHROMEOS_POLICY_POLICY_OAUTH2_TOKEN_FETCHER_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/memory/weak_ptr.h"
  16 #include "google_apis/gaia/gaia_auth_consumer.h"
  17 #include "google_apis/gaia/oauth2_access_token_consumer.h"
  18
  19 class GaiaAuthFetcher;
  20 class OAuth2AccessTokenFetcher;
  21
  22 namespace net {
  23 class URLRequestContextGetter;
  24 }
  25
  26 namespace policy {
  27
  28 // Fetches the OAuth2 token for the device management service. Since Profile
  29 // creation might be blocking on a user policy fetch, this fetcher must always
  30 // send a (possibly empty) token to the callback, which will then let the policy
  31 // subsystem proceed and resume Profile creation. Sending the token even when no
  32 // Profile is pending is also OK.
  33 class PolicyOAuth2TokenFetcher
  34     : public base::SupportsWeakPtr<PolicyOAuth2TokenFetcher>,
  35       public GaiaAuthConsumer,
  36       public OAuth2AccessTokenConsumer {
  37  public:
  38   typedef base::Callback<void(const std::string&,
  39                               const GoogleServiceAuthError&)> TokenCallback;
  40
  41   // Fetches the device management service's oauth2 token, after also retrieving
  42   // the OAuth2 refresh tokens.
  43   PolicyOAuth2TokenFetcher(net::URLRequestContextGetter* auth_context_getter,
  44                            net::URLRequestContextGetter* system_context_getter,
  45                            const TokenCallback& callback);
  46
  47   ~PolicyOAuth2TokenFetcher() override;
  48
  49   // Starts process of minting device management service OAuth2 access token.
  50   void Start();
  51
  52   // Returns true if we have previously attempted to fetch tokens with this
  53   // class and failed.
  54   bool failed() const {
  55     return failed_;
  56   }
  57
  58   const std::string& oauth2_refresh_token() const {
  59     return oauth2_refresh_token_;
  60   }
  61   const std::string& oauth2_access_token() const {
  62     return oauth2_access_token_;
  63   }
  64
  65  private:
  66   // GaiaAuthConsumer overrides.
  67   void OnClientOAuthSuccess(
  68       const GaiaAuthConsumer::ClientOAuthResult& oauth_tokens) override;
  69   void OnClientOAuthFailure(const GoogleServiceAuthError& error) override;
  70
  71   // OAuth2AccessTokenConsumer overrides.
  72   void OnGetTokenSuccess(const std::string& access_token,
  73                          const base::Time& expiration_time) override;
  74   void OnGetTokenFailure(const GoogleServiceAuthError& error) override;
  75
  76   // Starts fetching OAuth2 refresh token.
  77   void StartFetchingRefreshToken();
  78
  79   // Starts fetching OAuth2 access token for the device management service.
  80   void StartFetchingAccessToken();
  81
  82   // Decides how to proceed on GAIA |error|. If the error looks temporary,
  83   // retries |task| until max retry count is reached.
  84   // If retry count runs out, or error condition is unrecoverable, it calls
  85   // Delegate::OnOAuth2TokenFetchFailed().
  86   void RetryOnError(const GoogleServiceAuthError& error,
  87                     const base::Closure& task);
  88
  89   // Passes |token| and |error| to the |callback_|.
  90   void ForwardPolicyToken(const std::string& token,
  91                           const GoogleServiceAuthError& error);
  92
  93   scoped_refptr<net::URLRequestContextGetter> auth_context_getter_;
  94   scoped_refptr<net::URLRequestContextGetter> system_context_getter_;
  95   scoped_ptr<GaiaAuthFetcher> refresh_token_fetcher_;
  96   scoped_ptr<OAuth2AccessTokenFetcher> access_token_fetcher_;
  97
  98   // OAuth2 refresh token. Could come either from the outside or through
  99   // refresh token fetching flow within this class.
 100   std::string oauth2_refresh_token_;
 101
 102   // OAuth2 access token.
 103   std::string oauth2_access_token_;
 104
 105   // The retry counter. Increment this only when failure happened.
 106   int retry_count_;
 107
 108   // True if we have already failed to fetch the policy.
 109   bool failed_;
 110
 111   // The callback to invoke when done.
 112   TokenCallback callback_;
 113
 114   DISALLOW_COPY_AND_ASSIGN(PolicyOAuth2TokenFetcher);
 115 };
 116
 117 }  // namespace policy
 118
 119 #endif  // CHROME_BROWSER_CHROMEOS_POLICY_POLICY_OAUTH2_TOKEN_FETCHER_H_