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.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   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
  69 void 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
  78 void 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
  86 void 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
  95 void 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
 103 void 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
 125 void 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