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// Copyright (c) 2012 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_OAUTH2_REVOCATION_FETCHER_H_
#define GOOGLE_APIS_GAIA_OAUTH2_REVOCATION_FETCHER_H_
#include <string>
#include "base/gtest_prod_util.h"
#include "base/memory/scoped_ptr.h"
#include "google_apis/gaia/oauth2_revocation_consumer.h"
#include "googleurl/src/gurl.h"
#include "net/url_request/url_fetcher_delegate.h"
class OAuth2RevocationFetcherTest;
namespace net {
class URLFetcher;
class URLRequestContextGetter;
class URLRequestStatus;
}
// Abstracts the details to perform OAuth2 grant revocation.
//
// This class should be used on a single thread, but it can be whichever thread
// that you like.
// Also, do not reuse the same instance. Once Start() is called, the instance
// should not be reused.
//
// Usage:
// * Create an instance with a consumer.
// * Call Start()
// * The consumer passed in the constructor will be called on the same
// thread Start was called with the results.
//
// This class can handle one request at a time. To parallelize requests,
// create multiple instances.
class OAuth2RevocationFetcher : public net::URLFetcherDelegate {
public:
OAuth2RevocationFetcher(OAuth2RevocationConsumer* consumer,
net::URLRequestContextGetter* getter);
virtual ~OAuth2RevocationFetcher();
// Starts the flow with the given parameters.
// |access_token| should be an OAuth2 login scoped access token.
void Start(const std::string& access_token,
const std::string& client_id,
const std::string& origin);
void CancelRequest();
// Implementation of net::URLFetcherDelegate
virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
private:
enum State {
INITIAL,
REVOCATION_STARTED,
REVOCATION_DONE,
ERROR_STATE,
};
// Helper methods for the flow.
void StartRevocation();
void EndRevocation(const net::URLFetcher* source);
// Helper mehtods for reporting back results.
void OnRevocationSuccess();
void OnRevocationFailure(const GoogleServiceAuthError& error);
// Other helpers.
static GURL MakeRevocationUrl();
static std::string MakeRevocationHeader(const std::string& access_token);
static std::string MakeRevocationBody(const std::string& client_id,
const std::string& origin);
// State that is set during construction.
OAuth2RevocationConsumer* const consumer_;
net::URLRequestContextGetter* const getter_;
State state_;
// While a fetch is in progress.
scoped_ptr<net::URLFetcher> fetcher_;
std::string access_token_;
std::string client_id_;
std::string origin_;
friend class OAuth2RevocationFetcherTest;
DISALLOW_COPY_AND_ASSIGN(OAuth2RevocationFetcher);
};
#endif // GOOGLE_APIS_GAIA_OAUTH2_REVOCATION_FETCHER_H_