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// Copyright 2013 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_SETUP_OAUTH_CLIENT
#define REMOTING_HOST_SETUP_OAUTH_CLIENT
#include <queue>
#include <string>
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "google_apis/gaia/gaia_oauth_client.h"
#include "net/url_request/url_request_context_getter.h"
namespace net {
class URLRequestContext;
}
namespace remoting {
// A wrapper around GaiaOAuthClient that provides a more convenient interface,
// with queueing of requests and a callback rather than a delegate.
class OAuthClient : public gaia::GaiaOAuthClient::Delegate {
public:
// Called when GetCredentialsFromAuthCode is completed, with the |user_email|
// and |refresh_token| that correspond to the given |auth_code|, or with empty
// strings on error.
typedef base::Callback<void(
const std::string& user_email,
const std::string& refresh_token)> CompletionCallback;
OAuthClient(
scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
virtual ~OAuthClient();
// Redeems |auth_code| using |oauth_client_info| to obtain |refresh_token| and
// |access_token|, then uses the userinfo endpoint to obtain |user_email|.
// Calls CompletionCallback with |user_email| and |refresh_token| when done,
// or with empty strings on error.
// If a request is received while another one is being processed, it is
// enqueued and processed after the first one is finished.
void GetCredentialsFromAuthCode(
const gaia::OAuthClientInfo& oauth_client_info,
const std::string& auth_code,
CompletionCallback on_done);
// gaia::GaiaOAuthClient::Delegate
virtual void OnGetTokensResponse(const std::string& refresh_token,
const std::string& access_token,
int expires_in_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:
struct Request {
Request(const gaia::OAuthClientInfo& oauth_client_info,
const std::string& auth_code,
CompletionCallback on_done);
virtual ~Request();
gaia::OAuthClientInfo oauth_client_info;
std::string auth_code;
CompletionCallback on_done;
};
void SendResponse(const std::string& user_email,
const std::string& refresh_token);
std::queue<Request> pending_requests_;
gaia::GaiaOAuthClient gaia_oauth_client_;
std::string refresh_token_;
CompletionCallback on_done_;
DISALLOW_COPY_AND_ASSIGN(OAuthClient);
};
} // namespace remoting
#endif // REMOTING_HOST_SETUP_OAUTH_CLIENT
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