components/sync_driver/profile_sync_auth_provider.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/sync_driver/profile_sync_auth_provider.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "base/single_thread_task_runner.h"
  10 #include "base/thread_task_runner_handle.h"
  11 #include "components/signin/core/browser/profile_oauth2_token_service.h"
  12 #include "google_apis/gaia/gaia_constants.h"
  13
  14 // This is thin proxy class for forwarding calls between sync and UI threads.
  15 // The main purpose is to hide the fact that ProfileSyncAuthProvider and
  16 // SyncThreadProxy have independent lifetimes. If ProfileSyncAuthProvider is
  17 // destroyed first calls to RequestAccessToken will never complete. This is fine
  18 // since sync thread is not blocked and is in the process of shutdown anyway.
  19 class ProfileSyncAuthProvider::SyncThreadProxy
  20     : public syncer::SyncAuthProvider,
  21       public base::NonThreadSafe {
  22  public:
  23   SyncThreadProxy(
  24       base::WeakPtr<ProfileSyncAuthProvider> provider_impl,
  25       scoped_refptr<base::SingleThreadTaskRunner> provider_task_runner);
  26
  27   // syncer::SyncAuthProvider implementation.
  28   void RequestAccessToken(const RequestTokenCallback& callback) override;
  29   void InvalidateAccessToken(const std::string& token) override;
  30
  31  private:
  32   base::WeakPtr<ProfileSyncAuthProvider> provider_impl_;
  33   scoped_refptr<base::SingleThreadTaskRunner> provider_task_runner_;
  34
  35   DISALLOW_COPY_AND_ASSIGN(SyncThreadProxy);
  36 };
  37
  38 ProfileSyncAuthProvider::SyncThreadProxy::SyncThreadProxy(
  39     base::WeakPtr<ProfileSyncAuthProvider> provider_impl,
  40     scoped_refptr<base::SingleThreadTaskRunner> provider_task_runner)
  41     : provider_impl_(provider_impl),
  42       provider_task_runner_(provider_task_runner) {
  43   // SyncThreadProxy is created on UI thread but used on sync thread.
  44   // Detach NonThreadSafe from UI thread so that it can reattach to sync thread
  45   // on first invocation.
  46   DetachFromThread();
  47 }
  48
  49 void ProfileSyncAuthProvider::SyncThreadProxy::RequestAccessToken(
  50     const RequestTokenCallback& callback) {
  51   DCHECK(CalledOnValidThread());
  52   provider_task_runner_->PostTask(
  53       FROM_HERE,
  54       base::Bind(&ProfileSyncAuthProvider::RequestAccessToken,
  55                  provider_impl_,
  56                  callback,
  57                  base::ThreadTaskRunnerHandle::Get()));
  58 }
  59
  60 void ProfileSyncAuthProvider::SyncThreadProxy::InvalidateAccessToken(
  61     const std::string& token) {
  62   DCHECK(CalledOnValidThread());
  63   provider_task_runner_->PostTask(
  64       FROM_HERE,
  65       base::Bind(&ProfileSyncAuthProvider::InvalidateAccessToken,
  66                  provider_impl_,
  67                  token));
  68 }
  69
  70 ProfileSyncAuthProvider::ProfileSyncAuthProvider(
  71     ProfileOAuth2TokenService* token_service,
  72     const std::string& account_id,
  73     const std::string& scope)
  74     : OAuth2TokenService::Consumer("sync_auth_provider"),
  75       token_service_(token_service),
  76       account_id_(account_id),
  77       weak_factory_(this) {
  78   oauth2_scope_.insert(scope);
  79 }
  80
  81 ProfileSyncAuthProvider::~ProfileSyncAuthProvider() {
  82   DCHECK(CalledOnValidThread());
  83 }
  84
  85 void ProfileSyncAuthProvider::RequestAccessToken(
  86     const syncer::SyncAuthProvider::RequestTokenCallback& callback,
  87     scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
  88   DCHECK(CalledOnValidThread());
  89   if (access_token_request_ != NULL) {
  90     // If there is already pending request report it as cancelled.
  91     GoogleServiceAuthError error(GoogleServiceAuthError::REQUEST_CANCELED);
  92     RespondToTokenRequest(error, std::string());
  93   }
  94   request_token_callback_ = callback;
  95   callback_task_runner_ = task_runner;
  96   access_token_request_ =
  97       token_service_->StartRequest(account_id_, oauth2_scope_, this);
  98 }
  99
 100 void ProfileSyncAuthProvider::OnGetTokenSuccess(
 101     const OAuth2TokenService::Request* request,
 102     const std::string& access_token,
 103     const base::Time& expiration_time) {
 104   DCHECK_EQ(access_token_request_, request);
 105   RespondToTokenRequest(GoogleServiceAuthError::AuthErrorNone(), access_token);
 106 }
 107
 108 void ProfileSyncAuthProvider::OnGetTokenFailure(
 109     const OAuth2TokenService::Request* request,
 110     const GoogleServiceAuthError& error) {
 111   DCHECK_EQ(access_token_request_, request);
 112   RespondToTokenRequest(error, std::string());
 113 }
 114
 115 void ProfileSyncAuthProvider::RespondToTokenRequest(
 116     const GoogleServiceAuthError& error,
 117     const std::string& token) {
 118   DCHECK(CalledOnValidThread());
 119   callback_task_runner_->PostTask(
 120       FROM_HERE, base::Bind(request_token_callback_, error, token));
 121   access_token_request_.reset();
 122   request_token_callback_.Reset();
 123   callback_task_runner_ = NULL;
 124 }
 125
 126 void ProfileSyncAuthProvider::InvalidateAccessToken(const std::string& token) {
 127   DCHECK(CalledOnValidThread());
 128   token_service_->InvalidateAccessToken(account_id_, oauth2_scope_, token);
 129 }
 130
 131 scoped_ptr<syncer::SyncAuthProvider>
 132 ProfileSyncAuthProvider::CreateProviderForSyncThread() {
 133   DCHECK(CalledOnValidThread());
 134   scoped_ptr<syncer::SyncAuthProvider> auth_provider(new SyncThreadProxy(
 135       weak_factory_.GetWeakPtr(), base::ThreadTaskRunnerHandle::Get()));
 136   return auth_provider.Pass();
 137 }