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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 REMOTING_HOST_OAUTH_TOKEN_GETTER_H_
#define REMOTING_HOST_OAUTH_TOKEN_GETTER_H_
#include <queue>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/threading/non_thread_safe.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "google_apis/gaia/gaia_oauth_client.h"
namespace net {
class URLRequestContextGetter;
} // namespace net
namespace remoting {
// OAuthTokenGetter caches OAuth access tokens and refreshes them as needed.
class OAuthTokenGetter :
public base::NonThreadSafe,
public gaia::GaiaOAuthClient::Delegate {
public:
// Status of the refresh token attempt.
enum Status {
// Success, credentials in user_email/access_token.
SUCCESS,
// Network failure (caller may retry).
NETWORK_ERROR,
// Authentication failure (permanent).
AUTH_ERROR,
};
typedef base::Callback<void(Status status,
const std::string& user_email,
const std::string& access_token)> TokenCallback;
// This structure contains information required to perform
// authentication to OAuth2.
struct OAuthCredentials {
OAuthCredentials(const std::string& login,
const std::string& refresh_token,
bool is_service_account);
// The user's account name (i.e. their email address).
std::string login;
// Token delegating authority to us to act as the user.
std::string refresh_token;
// Whether these credentials belong to a service account.
bool is_service_account;
};
OAuthTokenGetter(
scoped_ptr<OAuthCredentials> oauth_credentials,
scoped_refptr<net::URLRequestContextGetter> url_request_context_getter,
bool auto_refresh);
virtual ~OAuthTokenGetter();
// Call |on_access_token| with an access token, or the failure status.
void CallWithToken(const OAuthTokenGetter::TokenCallback& on_access_token);
// gaia::GaiaOAuthClient::Delegate interface.
virtual void OnGetTokensResponse(const std::string& user_email,
const std::string& access_token,
int expires_seconds) OVERRIDE;
virtual void OnRefreshTokenResponse(const std::string& access_token,
int expires_in_seconds) OVERRIDE;
virtual void OnGetUserEmailResponse(const std::string& user_email) OVERRIDE;
virtual void OnOAuthError() OVERRIDE;
virtual void OnNetworkError(int response_code) OVERRIDE;
private:
void NotifyCallbacks(Status status,
const std::string& user_email,
const std::string& access_token);
void RefreshOAuthToken();
scoped_ptr<OAuthCredentials> oauth_credentials_;
scoped_ptr<gaia::GaiaOAuthClient> gaia_oauth_client_;
scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;
bool refreshing_oauth_token_;
std::string oauth_access_token_;
std::string verified_email_;
base::Time auth_token_expiry_time_;
std::queue<OAuthTokenGetter::TokenCallback> pending_callbacks_;
scoped_ptr<base::OneShotTimer<OAuthTokenGetter> > refresh_timer_;
DISALLOW_COPY_AND_ASSIGN(OAuthTokenGetter);
};
} // namespace remoting
#endif // REMOTING_HOST_OAUTH_TOKEN_GETTER_H_
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