chrome/browser/sync/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 "chrome/browser/sync/profile_sync_auth_provider.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "base/message_loop/message_loop_proxy.h"
  10 #include "base/single_thread_task_runner.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   virtual void RequestAccessToken(
  29       const RequestTokenCallback& callback) override;
  30   virtual void InvalidateAccessToken(const std::string& token) override;
  31
  32  private:
  33   base::WeakPtr<ProfileSyncAuthProvider> provider_impl_;
  34   scoped_refptr<base::SingleThreadTaskRunner> provider_task_runner_;
  35
  36   DISALLOW_COPY_AND_ASSIGN(SyncThreadProxy);
  37 };
  38
  39 ProfileSyncAuthProvider::SyncThreadProxy::SyncThreadProxy(
  40     base::WeakPtr<ProfileSyncAuthProvider> provider_impl,
  41     scoped_refptr<base::SingleThreadTaskRunner> provider_task_runner)
  42     : provider_impl_(provider_impl),
  43       provider_task_runner_(provider_task_runner) {
  44   // SyncThreadProxy is created on UI thread but used on sync thread.
  45   // Detach NonThreadSafe from UI thread so that it can reattach to sync thread
  46   // on first invocation.
  47   DetachFromThread();
  48 }
  49
  50 void ProfileSyncAuthProvider::SyncThreadProxy::RequestAccessToken(
  51     const RequestTokenCallback& callback) {
  52   DCHECK(CalledOnValidThread());
  53   provider_task_runner_->PostTask(
  54       FROM_HERE,
  55       base::Bind(&ProfileSyncAuthProvider::RequestAccessToken,
  56                  provider_impl_,
  57                  callback,
  58                  base::MessageLoopProxy::current()));
  59 }
  60
  61 void ProfileSyncAuthProvider::SyncThreadProxy::InvalidateAccessToken(
  62     const std::string& token) {
  63   DCHECK(CalledOnValidThread());
  64   provider_task_runner_->PostTask(
  65       FROM_HERE,
  66       base::Bind(&ProfileSyncAuthProvider::InvalidateAccessToken,
  67                  provider_impl_,
  68                  token));
  69 }
  70
  71 ProfileSyncAuthProvider::ProfileSyncAuthProvider(
  72     ProfileOAuth2TokenService* token_service,
  73     const std::string& account_id,
  74     const std::string& scope)
  75     : OAuth2TokenService::Consumer("sync_auth_provider"),
  76       token_service_(token_service),
  77       account_id_(account_id),
  78       weak_factory_(this) {
  79   oauth2_scope_.insert(scope);
  80 }
  81
  82 ProfileSyncAuthProvider::~ProfileSyncAuthProvider() {
  83   DCHECK(CalledOnValidThread());
  84 }
  85
  86 void ProfileSyncAuthProvider::RequestAccessToken(
  87     const syncer::SyncAuthProvider::RequestTokenCallback& callback,
  88     scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
  89   DCHECK(CalledOnValidThread());
  90   if (access_token_request_ != NULL) {
  91     // If there is already pending request report it as cancelled.
  92     GoogleServiceAuthError error(GoogleServiceAuthError::REQUEST_CANCELED);
  93     RespondToTokenRequest(error, std::string());
  94   }
  95   request_token_callback_ = callback;
  96   callback_task_runner_ = task_runner;
  97   access_token_request_ =
  98       token_service_->StartRequest(account_id_, oauth2_scope_, this);
  99 }
 100
 101 void ProfileSyncAuthProvider::OnGetTokenSuccess(
 102     const OAuth2TokenService::Request* request,
 103     const std::string& access_token,
 104     const base::Time& expiration_time) {
 105   DCHECK_EQ(access_token_request_, request);
 106   RespondToTokenRequest(GoogleServiceAuthError::AuthErrorNone(), access_token);
 107 }
 108
 109 void ProfileSyncAuthProvider::OnGetTokenFailure(
 110     const OAuth2TokenService::Request* request,
 111     const GoogleServiceAuthError& error) {
 112   DCHECK_EQ(access_token_request_, request);
 113   RespondToTokenRequest(error, std::string());
 114 }
 115
 116 void ProfileSyncAuthProvider::RespondToTokenRequest(
 117     const GoogleServiceAuthError& error,
 118     const std::string& token) {
 119   DCHECK(CalledOnValidThread());
 120   callback_task_runner_->PostTask(
 121       FROM_HERE, base::Bind(request_token_callback_, error, token));
 122   access_token_request_.reset();
 123   request_token_callback_.Reset();
 124   callback_task_runner_ = NULL;
 125 }
 126
 127 void ProfileSyncAuthProvider::InvalidateAccessToken(const std::string& token) {
 128   DCHECK(CalledOnValidThread());
 129   token_service_->InvalidateToken(account_id_, oauth2_scope_, token);
 130 }
 131
 132 scoped_ptr<syncer::SyncAuthProvider>
 133 ProfileSyncAuthProvider::CreateProviderForSyncThread() {
 134   DCHECK(CalledOnValidThread());
 135   scoped_ptr<syncer::SyncAuthProvider> auth_provider(new SyncThreadProxy(
 136       weak_factory_.GetWeakPtr(), base::MessageLoopProxy::current()));
 137   return auth_provider.Pass();
 138 }