policy_oauth2_token_fetcher.h revision c2e0dbddbe15c98d52c4786dac06cb8952a8ae6d 
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
19class GaiaAuthFetcher;
20class OAuth2AccessTokenFetcher;
21
22namespace net {
23class URLRequestContextGetter;
24}
25
26namespace 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.
33class PolicyOAuth2TokenFetcher
34    : public base::SupportsWeakPtr<PolicyOAuth2TokenFetcher>,
35      public GaiaAuthConsumer,
36      public OAuth2AccessTokenConsumer {
37 public:
38  typedef base::Callback<void(const std::string&)> TokenCallback;
39
40  // Fetches the device management service's OAuth2 token using
41  // |oauth2_tokens.refresh_token|.
42  PolicyOAuth2TokenFetcher(net::URLRequestContextGetter* system_context_getter,
43                           const std::string& oauth2_refresh_token,
44                           const TokenCallback& callback);
45
46  // Fetches the device management service's oauth2 token, after also retrieving
47  // the OAuth2 refresh tokens.
48  PolicyOAuth2TokenFetcher(net::URLRequestContextGetter* auth_context_getter,
49                           net::URLRequestContextGetter* system_context_getter,
50                           const TokenCallback& callback);
51
52  virtual ~PolicyOAuth2TokenFetcher();
53
54  // Starts process of minting device management service OAuth2 access token.
55  void Start();
56
57  // Returns OAuth2 tokens fetched through an authenticated cookie jar.
58  const GaiaAuthConsumer::ClientOAuthResult& oauth2_tokens() const {
59    return oauth2_tokens_;
60  }
61
62  // True if we have OAuth2 tokens that were fetched through an authenticated
63  // cookie jar.
64  bool has_oauth2_tokens() const {
65    return !oauth2_tokens_.refresh_token.empty();
66  }
67
68  // Returns true if we have previously attempted to fetch tokens with this
69  // class and failed.
70  bool failed() const {
71    return failed_;
72  }
73
74 private:
75  // GaiaAuthConsumer overrides.
76  virtual void OnClientOAuthSuccess(
77      const GaiaAuthConsumer::ClientOAuthResult& oauth_tokens) OVERRIDE;
78  virtual void OnClientOAuthFailure(
79      const GoogleServiceAuthError& error) OVERRIDE;
80
81  // OAuth2AccessTokenConsumer overrides.
82  virtual void OnGetTokenSuccess(const std::string& access_token,
83                                 const base::Time& expiration_time) OVERRIDE;
84  virtual void OnGetTokenFailure(const GoogleServiceAuthError& error) OVERRIDE;
85
86  // Starts fetching OAuth2 refresh token.
87  void StartFetchingRefreshToken();
88
89  // Starts fetching OAuth2 access token for the device management service.
90  void StartFetchingAccessToken();
91
92  // Decides how to proceed on GAIA |error|. If the error looks temporary,
93  // retries |task| until max retry count is reached.
94  // If retry count runs out, or error condition is unrecoverable, it calls
95  // Delegate::OnOAuth2TokenFetchFailed().
96  void RetryOnError(const GoogleServiceAuthError& error,
97                    const base::Closure& task);
98
99  // Passes |token| to the |callback_|.
100  void ForwardPolicyToken(const std::string& token);
101
102  scoped_refptr<net::URLRequestContextGetter> auth_context_getter_;
103  scoped_refptr<net::URLRequestContextGetter> system_context_getter_;
104  scoped_ptr<GaiaAuthFetcher> refresh_token_fetcher_;
105  scoped_ptr<OAuth2AccessTokenFetcher> access_token_fetcher_;
106  GaiaAuthConsumer::ClientOAuthResult oauth2_tokens_;
107
108  // OAuth2 refresh token. Could come either from the outside or through
109  // refresh token fetching flow within this class.
110  std::string oauth2_refresh_token_;
111
112  // The retry counter. Increment this only when failure happened.
113  int retry_count_;
114
115  // True if we have already failed to fetch the policy.
116  bool failed_;
117
118  // The callback to invoke when done.
119  TokenCallback callback_;
120
121  DISALLOW_COPY_AND_ASSIGN(PolicyOAuth2TokenFetcher);
122};
123
124}  // namespace policy
125
126#endif  // CHROME_BROWSER_CHROMEOS_POLICY_POLICY_OAUTH2_TOKEN_FETCHER_H_
127