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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_MINT_TOKEN_FETCHER_H_
#define GOOGLE_APIS_GAIA_OAUTH2_MINT_TOKEN_FETCHER_H_
#include <string>
#include <vector>
#include "base/gtest_prod_util.h"
#include "base/memory/scoped_ptr.h"
#include "google_apis/gaia/oauth2_mint_token_consumer.h"
#include "googleurl/src/gurl.h"
#include "net/url_request/url_fetcher_delegate.h"
class OAuth2MintTokenFetcherTest;
namespace net {
class URLFetcher;
class URLRequestContextGetter;
class URLRequestStatus;
}
// Abstracts the details to mint new OAuth2 tokens from OAuth2 login scoped
// token.
//
// 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 OAuth2MintTokenFetcher : public net::URLFetcherDelegate {
public:
OAuth2MintTokenFetcher(OAuth2MintTokenConsumer* consumer,
net::URLRequestContextGetter* getter,
const std::string& source);
virtual ~OAuth2MintTokenFetcher();
// Start the flow.
virtual void Start(const std::string& oauth_login_access_token,
const std::string& client_id,
const std::vector<std::string>& scopes,
const std::string& origin);
void CancelRequest();
// Implementation of net::URLFetcherDelegate
virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
private:
enum State {
INITIAL,
MINT_TOKEN_STARTED,
MINT_TOKEN_DONE,
ERROR_STATE,
};
// Helper methods for the flow.
void StartMintToken();
void EndMintToken(const net::URLFetcher* source);
// Helper methods for reporting back results.
void OnMintTokenSuccess(const std::string& access_token);
void OnMintTokenFailure(const GoogleServiceAuthError& error);
// Other helpers.
static GURL MakeMintTokenUrl();
static std::string MakeMintTokenHeader(const std::string& access_token);
static std::string MakeMintTokenBody(const std::string& client_id,
const std::vector<std::string>& scopes,
const std::string& origin);
static bool ParseMintTokenResponse(const net::URLFetcher* source,
std::string* access_token);
// State that is set during construction.
OAuth2MintTokenConsumer* const consumer_;
net::URLRequestContextGetter* const getter_;
std::string source_;
State state_;
// While a fetch is in progress.
scoped_ptr<net::URLFetcher> fetcher_;
std::string oauth_login_access_token_;
std::string client_id_;
std::vector<std::string> scopes_;
std::string origin_;
friend class OAuth2MintTokenFetcherTest;
FRIEND_TEST_ALL_PREFIXES(OAuth2MintTokenFetcherTest,
ParseMintTokenResponse);
DISALLOW_COPY_AND_ASSIGN(OAuth2MintTokenFetcher);
};
#endif // GOOGLE_APIS_GAIA_OAUTH2_MINT_TOKEN_FETCHER_H_