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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GOOGLE_APIS_GAIA_UBERTOKEN_FETCHER_H_
#define GOOGLE_APIS_GAIA_UBERTOKEN_FETCHER_H_
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/timer/timer.h"
#include "google_apis/gaia/gaia_auth_consumer.h"
#include "google_apis/gaia/oauth2_token_service.h"
// Allow to retrieves an uber-auth token for the user. This class uses the
// |OAuth2TokenService| and considers that the user is already logged in. It
// will use the OAuth2 access token to generate the uber-auth token.
//
// This class should be used on a single thread, but it can be whichever thread
// that you like.
//
// This class can handle one request at a time.
class GaiaAuthFetcher;
class GoogleServiceAuthError;
namespace net {
class URLRequestContextGetter;
}
typedef base::Callback<GaiaAuthFetcher*(GaiaAuthConsumer*,
const std::string&,
net::URLRequestContextGetter*)>
GaiaAuthFetcherFactory;
// Callback for the |UbertokenFetcher| class.
class UbertokenConsumer {
public:
UbertokenConsumer() {}
virtual ~UbertokenConsumer() {}
virtual void OnUbertokenSuccess(const std::string& token) {}
virtual void OnUbertokenFailure(const GoogleServiceAuthError& error) {}
};
// Allows to retrieve an uber-auth token.
class UbertokenFetcher : public GaiaAuthConsumer,
public OAuth2TokenService::Consumer {
public:
// Maximum number of retries to get the uber-auth token before giving up.
static const int kMaxRetries;
UbertokenFetcher(OAuth2TokenService* token_service,
UbertokenConsumer* consumer,
const std::string& source,
net::URLRequestContextGetter* request_context);
UbertokenFetcher(OAuth2TokenService* token_service,
UbertokenConsumer* consumer,
const std::string& source,
net::URLRequestContextGetter* request_context,
GaiaAuthFetcherFactory factory);
~UbertokenFetcher() override;
// Start fetching the token for |account_id|.
virtual void StartFetchingToken(const std::string& account_id);
virtual void StartFetchingTokenWithAccessToken(const std::string& account_id,
const std::string& access_token);
// Overriden from GaiaAuthConsumer
void OnUberAuthTokenSuccess(const std::string& token) override;
void OnUberAuthTokenFailure(const GoogleServiceAuthError& error) override;
// Overriden from OAuth2TokenService::Consumer:
void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
const std::string& access_token,
const base::Time& expiration_time) override;
void OnGetTokenFailure(const OAuth2TokenService::Request* request,
const GoogleServiceAuthError& error) override;
private:
// Request a login-scoped access token from the token service.
void RequestAccessToken();
// Exchanges an oauth2 access token for an uber-auth token.
void ExchangeTokens();
OAuth2TokenService* token_service_;
UbertokenConsumer* consumer_;
std::string source_;
net::URLRequestContextGetter* request_context_;
GaiaAuthFetcherFactory gaia_auth_fetcher_factory_;
scoped_ptr<GaiaAuthFetcher> gaia_auth_fetcher_;
scoped_ptr<OAuth2TokenService::Request> access_token_request_;
std::string account_id_;
std::string access_token_;
int retry_number_;
base::OneShotTimer retry_timer_;
bool second_access_token_request_;
DISALLOW_COPY_AND_ASSIGN(UbertokenFetcher);
};
#endif // GOOGLE_APIS_GAIA_UBERTOKEN_FETCHER_H_
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