chromium/google_apis/gaia/oauth2_access_token_fetcher_impl.h

// Copyright 2014 The Chromium Authors
// 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_ACCESS_TOKEN_FETCHER_IMPL_H_
#define GOOGLE_APIS_GAIA_OAUTH2_ACCESS_TOKEN_FETCHER_IMPL_H_

#include <memory>
#include <string>
#include <vector>

#include "base/component_export.h"
#include "base/gtest_prod_util.h"
#include "base/memory/ref_counted.h"
#include "google_apis/gaia/oauth2_access_token_consumer.h"
#include "google_apis/gaia/oauth2_access_token_fetcher.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "url/gurl.h"

class OAuth2AccessTokenFetcherImplTest;

namespace network {
class SimpleURLLoader;
class SharedURLLoaderFactory;
}

// Abstracts the details to get OAuth2 access token from OAuth2 refresh token.
// See general document about Oauth2 in https://tools.ietf.org/html/rfc6749.
//
// 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.  Prefer `GaiaAccessTokenFetcher` over this class
// while talking to Google's OAuth servers.
class COMPONENT_EXPORT(GOOGLE_APIS) OAuth2AccessTokenFetcherImpl
    : public OAuth2AccessTokenFetcher { … };

#endif  // GOOGLE_APIS_GAIA_OAUTH2_ACCESS_TOKEN_FETCHER_IMPL_H_