chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.cc

   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_impl.h"
  18 #include "net/url_request/url_request_context_getter.h"
  19
  20 using content::BrowserThread;
  21
  22 namespace policy {
  23
  24 namespace {
  25
  26 // Max retry count for token fetching requests.
  27 const int kMaxRequestAttemptCount = 5;
  28
  29 // OAuth token request retry delay in milliseconds.
  30 const int kRequestRestartDelay = 3000;
  31
  32 }  // namespace
  33
  34 PolicyOAuth2TokenFetcher::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
  44 PolicyOAuth2TokenFetcher::~PolicyOAuth2TokenFetcher() {}
  45
  46 void PolicyOAuth2TokenFetcher::Start() {
  47   retry_count_ = 0;
  48   StartFetchingRefreshToken();
  49 }
  50
  51 void 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
  57 void PolicyOAuth2TokenFetcher::StartFetchingAccessToken() {
  58   std::vector<std::string> scopes;
  59   scopes.push_back(GaiaConstants::kDeviceManagementServiceOAuth);
  60   scopes.push_back(GaiaConstants::kOAuthWrapBridgeUserInfoScope);
  61   access_token_fetcher_.reset(
  62       new OAuth2AccessTokenFetcherImpl(this,
  63                                        system_context_getter_.get(),
  64                                        oauth2_refresh_token_));
  65   access_token_fetcher_->Start(
  66       GaiaUrls::GetInstance()->oauth2_chrome_client_id(),
  67       GaiaUrls::GetInstance()->oauth2_chrome_client_secret(),
  68       scopes);
  69 }
  70
  71 void PolicyOAuth2TokenFetcher::OnClientOAuthSuccess(
  72     const GaiaAuthConsumer::ClientOAuthResult& oauth2_tokens) {
  73   VLOG(1) << "OAuth2 tokens for policy fetching succeeded.";
  74   oauth2_tokens_ = oauth2_tokens;
  75   oauth2_refresh_token_ = oauth2_tokens.refresh_token;
  76   retry_count_ = 0;
  77   StartFetchingAccessToken();
  78 }
  79
  80 void PolicyOAuth2TokenFetcher::OnClientOAuthFailure(
  81     const GoogleServiceAuthError& error) {
  82   VLOG(1) << "OAuth2 tokens fetch for policy fetch failed!";
  83   RetryOnError(error,
  84                base::Bind(&PolicyOAuth2TokenFetcher::StartFetchingRefreshToken,
  85                           AsWeakPtr()));
  86 }
  87
  88 void PolicyOAuth2TokenFetcher::OnGetTokenSuccess(
  89     const std::string& access_token,
  90     const base::Time& expiration_time) {
  91   VLOG(1) << "OAuth2 access token (device management) fetching succeeded.";
  92   oauth2_access_token_ = access_token;
  93   ForwardPolicyToken(access_token,
  94                      GoogleServiceAuthError(GoogleServiceAuthError::NONE));
  95 }
  96
  97 void PolicyOAuth2TokenFetcher::OnGetTokenFailure(
  98     const GoogleServiceAuthError& error) {
  99   LOG(ERROR) << "OAuth2 access token (device management) fetching failed!";
 100   RetryOnError(error,
 101                base::Bind(&PolicyOAuth2TokenFetcher::StartFetchingAccessToken,
 102                           AsWeakPtr()));
 103 }
 104
 105 void PolicyOAuth2TokenFetcher::RetryOnError(const GoogleServiceAuthError& error,
 106                                             const base::Closure& task) {
 107   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 108   if ((error.state() == GoogleServiceAuthError::CONNECTION_FAILED ||
 109        error.state() == GoogleServiceAuthError::SERVICE_UNAVAILABLE ||
 110        error.state() == GoogleServiceAuthError::REQUEST_CANCELED) &&
 111       retry_count_ < kMaxRequestAttemptCount) {
 112     retry_count_++;
 113     BrowserThread::PostDelayedTask(
 114         BrowserThread::UI, FROM_HERE, task,
 115         base::TimeDelta::FromMilliseconds(kRequestRestartDelay));
 116     return;
 117   }
 118   LOG(ERROR) << "Unrecoverable error or retry count max reached.";
 119   failed_ = true;
 120   // Invoking the |callback_| signals to the owner of this object that it has
 121   // completed, and the owner may delete this object on the callback method.
 122   // So don't rely on |this| still being valid after ForwardPolicyToken()
 123   // returns i.e. don't write to |failed_| or other fields.
 124   ForwardPolicyToken(std::string(), error);
 125 }
 126
 127 void PolicyOAuth2TokenFetcher::ForwardPolicyToken(
 128     const std::string& token,
 129     const GoogleServiceAuthError& error) {
 130   if (!callback_.is_null())
 131     callback_.Run(token, error);
 132 }
 133
 134 }  // namespace policy