3 * StatusNet, the distributed open-source microblogging tool
5 * Issue temporary OAuth credentials (a request token)
9 * LICENCE: This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU Affero General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Affero General Public License for more details.
19 * You should have received a copy of the GNU Affero General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * @author Zach Copley <zach@status.net>
25 * @copyright 2010 StatusNet, Inc.
26 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
27 * @link http://status.net/
30 if (!defined('STATUSNET')) {
34 require_once INSTALLDIR . '/lib/apioauth.php';
37 * Issue temporary OAuth credentials (a request token)
41 * @author Zach Copley <zach@status.net>
42 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
43 * @link http://status.net/
45 class ApiOauthRequestTokenAction extends ApiOauthAction
48 * Take arguments for running
50 * @param array $args $_REQUEST args
52 * @return boolean success flag
54 function prepare($args)
56 parent::prepare($args);
58 // XXX: support "force_login" parameter like Twitter? (Forces the user to enter
59 // their credentials to ensure the correct users account is authorized.)
65 * Handle a request for temporary OAuth credentials
67 * Make sure the request is kosher, then emit a set of temporary
68 * credentials -- AKA an unauthorized request token.
70 * @param array $args array of arguments
74 function handle($args)
76 parent::handle($args);
78 $datastore = new ApiStatusNetOAuthDataStore();
79 $server = new OAuthServer($datastore);
80 $hmac_method = new OAuthSignatureMethod_HMAC_SHA1();
82 $server->add_signature_method($hmac_method);
86 $req = OAuthRequest::from_request();
89 if (!$this->verifyCallback($req->get_parameter('oauth_callback'))) {
90 throw new OAuthException(
91 "You must provide a valid URL or 'oob' in oauth_callback.",
96 // check signature and issue a new request token
97 $token = $server->fetch_request_token($req);
102 "API OAuth - Issued request token %s for consumer %s with oauth_callback %s",
104 $req->get_parameter('oauth_consumer_key'),
105 "'" . $req->get_parameter('oauth_callback') ."'"
109 // return token to the client
110 $this->showRequestToken($token);
112 } catch (OAuthException $e) {
113 common_log(LOG_WARNING, 'API OAuthException - ' . $e->getMessage());
115 // Return 401 for for bad credentials or signature problems,
116 // and 400 for missing or unsupported parameters
118 $code = $e->getCode();
119 $this->clientError($e->getMessage(), empty($code) ? 401 : $code, 'text');
124 * Display temporary OAuth credentials
126 function showRequestToken($token)
128 header('Content-Type: application/x-www-form-urlencoded');
130 print '&oauth_callback_confirmed=true';
133 /* Make sure the callback parameter contains either a real URL
134 * or the string 'oob'.
136 * @todo Check for evil/banned URLs here
138 * @return boolean true or false
140 function verifyCallback($callback)
142 if ($callback == "oob") {
143 common_debug("OAuth request token requested for out of band client.");
145 // XXX: Should we throw an error if a client is registered as a
146 // web application but requests the pin based workflow? For now I'm
147 // allowing the workflow to proceed and issuing a pin. --Zach
151 return Validate::uri($callback);