gnu-social/lib/oauthclient.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* Base class for doing OAuth calls as a consumer
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Action
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @copyright 2009 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
*/
if (!defined('STATUSNET') && !defined('LACONICA')) {
exit(1);
}
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require_once 'OAuth.php';
/**
* Exception wrapper for cURL errors
*
* @category Integration
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
*
*/
class OAuthClientException extends Exception
{
}
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/**
* Base class for doing OAuth calls as a consumer
*
* @category Integration
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
*
*/
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class OAuthClient
{
var $consumer;
var $token;
/**
* Constructor
*
* Can be initialized with just consumer key and secret for requesting new
* tokens or with additional request token or access token
*
* @param string $consumer_key consumer key
* @param string $consumer_secret consumer secret
* @param string $oauth_token user's token
* @param string $oauth_token_secret user's secret
*
* @return nothing
*/
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function __construct($consumer_key, $consumer_secret,
$oauth_token = null, $oauth_token_secret = null)
{
$this->sha1_method = new OAuthSignatureMethod_HMAC_SHA1();
$this->consumer = new OAuthConsumer($consumer_key, $consumer_secret);
$this->token = null;
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if (isset($oauth_token) && isset($oauth_token_secret)) {
$this->token = new OAuthToken($oauth_token, $oauth_token_secret);
}
}
/**
* Gets a request token from the given url
*
* @param string $url OAuth endpoint for grabbing request tokens
*
* @return OAuthToken $token the request token
*/
function getRequestToken($url)
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{
$response = $this->oAuthGet($url);
$arr = array();
parse_str($response, $arr);
if (isset($arr['oauth_token']) && isset($arr['oauth_token_secret'])) {
$token = new OAuthToken($arr['oauth_token'], @$arr['oauth_token_secret']);
return $token;
} else {
throw new OAuthClientException();
}
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}
/**
* Builds a link that can be redirected to in order to
* authorize a request token.
*
* @param string $url endpoint for authorizing request tokens
* @param OAuthToken $request_token the request token to be authorized
* @param string $oauth_callback optional callback url
*
* @return string $authorize_url the url to redirect to
*/
function getAuthorizeLink($url, $request_token, $oauth_callback = null)
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{
$authorize_url = $url . '?oauth_token=' .
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$request_token->key;
if (isset($oauth_callback)) {
$authorize_url .= '&oauth_callback=' . urlencode($oauth_callback);
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}
return $authorize_url;
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}
/**
* Fetches an access token
*
* @param string $url OAuth endpoint for exchanging authorized request tokens
* for access tokens
*
* @return OAuthToken $token the access token
*/
function getAccessToken($url)
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{
$response = $this->oAuthPost($url);
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parse_str($response);
$token = new OAuthToken($oauth_token, $oauth_token_secret);
return $token;
}
/**
* Use HTTP GET to make a signed OAuth request
*
* @param string $url OAuth endpoint
*
* @return mixed the request
*/
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function oAuthGet($url)
{
$request = OAuthRequest::from_consumer_and_token($this->consumer,
$this->token, 'GET', $url, null);
$request->sign_request($this->sha1_method,
$this->consumer, $this->token);
return $this->httpRequest($request->to_url());
}
/**
* Use HTTP POST to make a signed OAuth request
*
* @param string $url OAuth endpoint
* @param array $params additional post parameters
*
* @return mixed the request
*/
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function oAuthPost($url, $params = null)
{
$request = OAuthRequest::from_consumer_and_token($this->consumer,
$this->token, 'POST', $url, $params);
$request->sign_request($this->sha1_method,
$this->consumer, $this->token);
return $this->httpRequest($request->get_normalized_http_url(),
$request->to_postdata());
}
/**
* Make a HTTP request.
*
* @param string $url Where to make the
* @param array $params post parameters
*
* @return mixed the request
*/
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function httpRequest($url, $params = null)
{
$request = new HTTPClient($url);
$request->setConfig(array(
'connect_timeout' => 120,
'timeout' => 120,
'follow_redirects' => true,
'ssl_verify_peer' => false,
'ssl_verify_host' => false
));
// Twitter is strict about accepting invalid "Expect" headers
$request->setHeader('Expect', '');
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if (isset($params)) {
$request->setMethod(HTTP_Request2::METHOD_POST);
$request->setBody($params);
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}
try {
$response = $request->send();
$code = $response->getStatus();
if ($code < 200 || $code >= 400) {
throw new OAuthClientException($response->getBody(), $code);
}
return $response->getBody();
} catch (Exception $e) {
throw new OAuthClientException($e->getMessage(), $e->getCode());
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}
}
}