policy_oauth2_token_fetcher.cc revision f2477e01787aa58f445919b809d89e252beef54f 
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#include "chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.h"
6
7#include <vector>
8
9#include "base/bind.h"
10#include "base/logging.h"
11#include "base/strings/string_util.h"
12#include "content/public/browser/browser_thread.h"
13#include "google_apis/gaia/gaia_auth_fetcher.h"
14#include "google_apis/gaia/gaia_constants.h"
15#include "google_apis/gaia/gaia_urls.h"
16#include "google_apis/gaia/google_service_auth_error.h"
17#include "google_apis/gaia/oauth2_access_token_fetcher.h"
18#include "net/url_request/url_request_context_getter.h"
19
20using content::BrowserThread;
21
22namespace policy {
23
24namespace {
25
26// Max retry count for token fetching requests.
27const int kMaxRequestAttemptCount = 5;
28
29// OAuth token request retry delay in milliseconds.
30const int kRequestRestartDelay = 3000;
31
32}  // namespace
33
34PolicyOAuth2TokenFetcher::PolicyOAuth2TokenFetcher(
35    net::URLRequestContextGetter* auth_context_getter,
36    net::URLRequestContextGetter* system_context_getter,
37    const TokenCallback& callback)
38    : auth_context_getter_(auth_context_getter),
39      system_context_getter_(system_context_getter),
40      retry_count_(0),
41      failed_(false),
42      callback_(callback) {}
43
44PolicyOAuth2TokenFetcher::~PolicyOAuth2TokenFetcher() {}
45
46void PolicyOAuth2TokenFetcher::Start() {
47  retry_count_ = 0;
48  StartFetchingRefreshToken();
49}
50
51void PolicyOAuth2TokenFetcher::StartFetchingRefreshToken() {
52  refresh_token_fetcher_.reset(new GaiaAuthFetcher(
53      this, GaiaConstants::kChromeSource, auth_context_getter_.get()));
54  refresh_token_fetcher_->StartCookieForOAuthLoginTokenExchange(std::string());
55}
56
57void PolicyOAuth2TokenFetcher::StartFetchingAccessToken() {
58  std::vector<std::string> scopes;
59  scopes.push_back(GaiaConstants::kDeviceManagementServiceOAuth);
60  access_token_fetcher_.reset(
61      new OAuth2AccessTokenFetcher(this, system_context_getter_.get()));
62  access_token_fetcher_->Start(
63      GaiaUrls::GetInstance()->oauth2_chrome_client_id(),
64      GaiaUrls::GetInstance()->oauth2_chrome_client_secret(),
65      oauth2_refresh_token_,
66      scopes);
67}
68
69void PolicyOAuth2TokenFetcher::OnClientOAuthSuccess(
70    const GaiaAuthConsumer::ClientOAuthResult& oauth2_tokens) {
71  VLOG(1) << "OAuth2 tokens for policy fetching succeeded.";
72  oauth2_tokens_ = oauth2_tokens;
73  oauth2_refresh_token_ = oauth2_tokens.refresh_token;
74  retry_count_ = 0;
75  StartFetchingAccessToken();
76}
77
78void PolicyOAuth2TokenFetcher::OnClientOAuthFailure(
79    const GoogleServiceAuthError& error) {
80  VLOG(1) << "OAuth2 tokens fetch for policy fetch failed!";
81  RetryOnError(error,
82               base::Bind(&PolicyOAuth2TokenFetcher::StartFetchingRefreshToken,
83                          AsWeakPtr()));
84}
85
86void PolicyOAuth2TokenFetcher::OnGetTokenSuccess(
87    const std::string& access_token,
88    const base::Time& expiration_time) {
89  VLOG(1) << "OAuth2 access token (device management) fetching succeeded.";
90  oauth2_access_token_ = access_token;
91  ForwardPolicyToken(access_token,
92                     GoogleServiceAuthError(GoogleServiceAuthError::NONE));
93}
94
95void PolicyOAuth2TokenFetcher::OnGetTokenFailure(
96    const GoogleServiceAuthError& error) {
97  LOG(ERROR) << "OAuth2 access token (device management) fetching failed!";
98  RetryOnError(error,
99               base::Bind(&PolicyOAuth2TokenFetcher::StartFetchingAccessToken,
100                          AsWeakPtr()));
101}
102
103void PolicyOAuth2TokenFetcher::RetryOnError(const GoogleServiceAuthError& error,
104                                            const base::Closure& task) {
105  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
106  if ((error.state() == GoogleServiceAuthError::CONNECTION_FAILED ||
107       error.state() == GoogleServiceAuthError::SERVICE_UNAVAILABLE ||
108       error.state() == GoogleServiceAuthError::REQUEST_CANCELED) &&
109      retry_count_ < kMaxRequestAttemptCount) {
110    retry_count_++;
111    BrowserThread::PostDelayedTask(
112        BrowserThread::UI, FROM_HERE, task,
113        base::TimeDelta::FromMilliseconds(kRequestRestartDelay));
114    return;
115  }
116  LOG(ERROR) << "Unrecoverable error or retry count max reached.";
117  failed_ = true;
118  // Invoking the |callback_| signals to the owner of this object that it has
119  // completed, and the owner may delete this object on the callback method.
120  // So don't rely on |this| still being valid after ForwardPolicyToken()
121  // returns i.e. don't write to |failed_| or other fields.
122  ForwardPolicyToken(std::string(), error);
123}
124
125void PolicyOAuth2TokenFetcher::ForwardPolicyToken(
126    const std::string& token,
127    const GoogleServiceAuthError& error) {
128  if (!callback_.is_null())
129    callback_.Run(token, error);
130}
131
132}  // namespace policy
133