components/proximity_auth/cryptauth/cryptauth_access_token_fetcher_impl.cc

   1 // Copyright 2014 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 "components/proximity_auth/cryptauth/cryptauth_access_token_fetcher_impl.h"
   6
   7 namespace proximity_auth {
   8
   9 namespace {
  10
  11 // Returns the set of OAuth2 scopes that CryptAuth uses.
  12 OAuth2TokenService::ScopeSet GetScopes() {
  13   OAuth2TokenService::ScopeSet scopes;
  14   scopes.insert("https://www.googleapis.com/auth/cryptauth");
  15   return scopes;
  16 }
  17
  18 }  // namespace
  19
  20 CryptAuthAccessTokenFetcherImpl::CryptAuthAccessTokenFetcherImpl(
  21     OAuth2TokenService* token_service,
  22     const std::string& account_id)
  23     : OAuth2TokenService::Consumer("cryptauth_access_token_fetcher"),
  24       token_service_(token_service),
  25       account_id_(account_id),
  26       fetch_started_(false) {
  27 }
  28
  29 CryptAuthAccessTokenFetcherImpl::~CryptAuthAccessTokenFetcherImpl() {
  30 }
  31
  32 void CryptAuthAccessTokenFetcherImpl::FetchAccessToken(
  33     const AccessTokenCallback& callback) {
  34   if (fetch_started_) {
  35     LOG(WARNING) << "Create an instance for each token fetched. Do not reuse.";
  36     callback.Run(std::string());
  37     return;
  38   }
  39
  40   fetch_started_ = true;
  41   callback_ = callback;
  42   // This request will return a cached result if it is available, saving a
  43   // network round trip every time we fetch the access token.
  44   token_request_ = token_service_->StartRequest(account_id_, GetScopes(), this);
  45 }
  46
  47 void CryptAuthAccessTokenFetcherImpl::OnGetTokenSuccess(
  48     const OAuth2TokenService::Request* request,
  49     const std::string& access_token,
  50     const base::Time& expiration_time) {
  51   callback_.Run(access_token);
  52 }
  53
  54 void CryptAuthAccessTokenFetcherImpl::OnGetTokenFailure(
  55     const OAuth2TokenService::Request* request,
  56     const GoogleServiceAuthError& error) {
  57   callback_.Run(std::string());
  58 }
  59
  60 }  // namespace proximity_auth