3 * Laconica - a distributed open-source microblogging tool
4 * Copyright (C) 2008, Controlez-Vous, Inc.
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Affero General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Affero General Public License for more details.
16 * You should have received a copy of the GNU Affero General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 if (!defined('LACONICA')) { exit(1); }
22 require_once(INSTALLDIR.'/lib/omb.php');
24 class RemotesubscribeAction extends Action
30 function prepare($args)
32 parent::prepare($args);
34 if (common_logged_in()) {
35 $this->clientError(_('You can use the local subscription!'));
39 $this->nickname = $this->trimmed('nickname');
40 $this->profile_url = $this->trimmed('profile_url');
45 function handle($args)
47 parent::handle($args);
49 if ($_SERVER['REQUEST_METHOD'] == 'POST') {
51 $token = $this->trimmed('token');
52 if (!$token || $token != common_session_token()) {
53 $this->showForm(_('There was a problem with your session token. '.
54 'Try again, please.'));
57 $this->remoteSubscription();
63 function showForm($err=null)
69 function showPageNotice()
72 $this->element('div', 'error', $this->err);
74 $inst = _('To subscribe, you can [login](%%action.login%%),' .
75 ' or [register](%%action.register%%) a new ' .
76 ' account. If you already have an account ' .
77 ' on a [compatible microblogging site](%%doc.openmublog%%), ' .
78 ' enter your profile URL below.');
79 $output = common_markup_to_html($inst);
80 $this->elementStart('div', 'instructions');
82 $this->elementEnd('div');
88 return _('Remote subscribe');
91 function showContent()
93 # id = remotesubscribe conflicts with the
94 # button on profile page
95 $this->elementStart('form', array('id' => 'form_remote_subscribe',
97 'class' => 'form_settings',
98 'action' => common_local_url('remotesubscribe')));
99 $this->elementStart('fieldset');
100 $this->element('legend', 'Subscribe to a remote user');
101 $this->hidden('token', common_session_token());
103 $this->elementStart('ul', 'form_data');
104 $this->elementStart('li');
105 $this->input('nickname', _('User nickname'), $this->nickname,
106 _('Nickname of the user you want to follow'));
107 $this->elementEnd('li');
108 $this->elementStart('li');
109 $this->input('profile_url', _('Profile URL'), $this->profile_url,
110 _('URL of your profile on another compatible microblogging service'));
111 $this->elementEnd('li');
112 $this->elementEnd('ul');
113 $this->submit('submit', _('Subscribe'));
114 $this->elementEnd('fieldset');
115 $this->elementEnd('form');
118 function remoteSubscription()
120 $user = $this->getUser();
123 $this->showForm(_('No such user.'));
127 $this->profile_url = $this->trimmed('profile_url');
129 if (!$this->profile_url) {
130 $this->showForm(_('No such user.'));
134 if (!Validate::uri($this->profile_url, array('allowed_schemes' => array('http', 'https')))) {
135 $this->showForm(_('Invalid profile URL (bad format)'));
139 $fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
140 $yadis = Auth_Yadis_Yadis::discover($this->profile_url, $fetcher);
142 if (!$yadis || $yadis->failed) {
143 $this->showForm(_('Not a valid profile URL (no YADIS document).'));
147 # XXX: a little liberal for sites that accidentally put whitespace before the xml declaration
149 $xrds =& Auth_Yadis_XRDS::parseXRDS(trim($yadis->response_text));
152 $this->showForm(_('Not a valid profile URL (no XRDS defined).'));
156 $omb = $this->getOmb($xrds);
159 $this->showForm(_('Not a valid profile URL (incorrect services).'));
163 if (omb_service_uri($omb[OAUTH_ENDPOINT_REQUEST]) ==
164 common_local_url('requesttoken'))
166 $this->showForm(_('That\'s a local profile! Login to subscribe.'));
170 if (User::staticGet('uri', omb_local_id($omb[OAUTH_ENDPOINT_REQUEST]))) {
171 $this->showForm(_('That\'s a local profile! Login to subscribe.'));
175 list($token, $secret) = $this->requestToken($omb);
177 if (!$token || !$secret) {
178 $this->showForm(_('Couldn\'t get a request token.'));
182 $this->requestAuthorization($user, $omb, $token, $secret);
188 if ($this->nickname) {
189 $user = User::staticGet('nickname', $this->nickname);
194 function getOmb($xrds)
196 static $omb_endpoints = array(OMB_ENDPOINT_UPDATEPROFILE, OMB_ENDPOINT_POSTNOTICE);
197 static $oauth_endpoints = array(OAUTH_ENDPOINT_REQUEST, OAUTH_ENDPOINT_AUTHORIZE,
198 OAUTH_ENDPOINT_ACCESS);
201 # XXX: the following code could probably be refactored to eliminate dupes
203 $oauth_services = omb_get_services($xrds, OAUTH_DISCOVERY);
205 if (!$oauth_services) {
209 $oauth_service = $oauth_services[0];
211 $oauth_xrd = $this->getXRD($oauth_service, $xrds);
217 if (!$this->addServices($oauth_xrd, $oauth_endpoints, $omb)) {
221 $omb_services = omb_get_services($xrds, OMB_NAMESPACE);
223 if (!$omb_services) {
227 $omb_service = $omb_services[0];
229 $omb_xrd = $this->getXRD($omb_service, $xrds);
235 if (!$this->addServices($omb_xrd, $omb_endpoints, $omb)) {
239 # XXX: check that we got all the services we needed
241 foreach (array_merge($omb_endpoints, $oauth_endpoints) as $type) {
242 if (!array_key_exists($type, $omb) || !$omb[$type]) {
247 if (!omb_local_id($omb[OAUTH_ENDPOINT_REQUEST])) {
254 function getXRD($main_service, $main_xrds)
256 $uri = omb_service_uri($main_service);
257 if (strpos($uri, "#") !== 0) {
258 # FIXME: more rigorous handling of external service definitions
261 $id = substr($uri, 1);
262 $nodes = $main_xrds->allXrdNodes;
263 $parser = $main_xrds->parser;
264 foreach ($nodes as $node) {
265 $attrs = $parser->attributes($node);
266 if (array_key_exists('xml:id', $attrs) &&
267 $attrs['xml:id'] == $id) {
268 # XXX: trick the constructor into thinking this is the only node
269 $bogus_nodes = array($node);
270 return new Auth_Yadis_XRDS($parser, $bogus_nodes);
276 function addServices($xrd, $types, &$omb)
278 foreach ($types as $type) {
279 $matches = omb_get_services($xrd, $type);
281 $omb[$type] = $matches[0];
290 function requestToken($omb)
292 $con = omb_oauth_consumer();
294 $url = omb_service_uri($omb[OAUTH_ENDPOINT_REQUEST]);
296 # XXX: Is this the right thing to do? Strip off GET params and make them
297 # POST params? Seems wrong to me.
299 $parsed = parse_url($url);
301 parse_str($parsed['query'], $params);
303 $req = OAuthRequest::from_consumer_and_token($con, null, "POST", $url, $params);
305 $listener = omb_local_id($omb[OAUTH_ENDPOINT_REQUEST]);
311 $req->set_parameter('omb_listener', $listener);
312 $req->set_parameter('omb_version', OMB_VERSION_01);
314 # XXX: test to see if endpoint accepts this signature method
316 $req->sign_request(omb_hmac_sha1(), $con, null);
318 # We re-use this tool's fetcher, since it's pretty good
320 $fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
322 $result = $fetcher->post($req->get_normalized_http_url(),
324 array('User-Agent' => 'Laconica/' . LACONICA_VERSION));
326 if ($result->status != 200) {
330 parse_str($result->body, $return);
332 return array($return['oauth_token'], $return['oauth_token_secret']);
335 function requestAuthorization($user, $omb, $token, $secret)
337 global $config; # for license URL
339 $con = omb_oauth_consumer();
340 $tok = new OAuthToken($token, $secret);
342 $url = omb_service_uri($omb[OAUTH_ENDPOINT_AUTHORIZE]);
344 # XXX: Is this the right thing to do? Strip off GET params and make them
345 # POST params? Seems wrong to me.
347 $parsed = parse_url($url);
349 parse_str($parsed['query'], $params);
351 $req = OAuthRequest::from_consumer_and_token($con, $tok, 'GET', $url, $params);
353 # We send over a ton of information. This lets the other
354 # server store info about our user, and it lets the current
355 # user decide if they really want to authorize the subscription.
357 $req->set_parameter('omb_version', OMB_VERSION_01);
358 $req->set_parameter('omb_listener', omb_local_id($omb[OAUTH_ENDPOINT_REQUEST]));
359 $req->set_parameter('omb_listenee', $user->uri);
360 $req->set_parameter('omb_listenee_profile', common_profile_url($user->nickname));
361 $req->set_parameter('omb_listenee_nickname', $user->nickname);
362 $req->set_parameter('omb_listenee_license', $config['license']['url']);
364 $profile = $user->getProfile();
366 common_log_db_error($user, 'SELECT', __FILE__);
367 $this->serverError(_('User without matching profile'));
371 if ($profile->fullname) {
372 $req->set_parameter('omb_listenee_fullname', $profile->fullname);
374 if ($profile->homepage) {
375 $req->set_parameter('omb_listenee_homepage', $profile->homepage);
378 $req->set_parameter('omb_listenee_bio', $profile->bio);
380 if ($profile->location) {
381 $req->set_parameter('omb_listenee_location', $profile->location);
383 $avatar = $profile->getAvatar(AVATAR_PROFILE_SIZE);
385 $req->set_parameter('omb_listenee_avatar', $avatar->url);
388 # XXX: add a nonce to prevent replay attacks
390 $req->set_parameter('oauth_callback', common_local_url('finishremotesubscribe'));
392 # XXX: test to see if endpoint accepts this signature method
394 $req->sign_request(omb_hmac_sha1(), $con, $tok);
396 # store all our info here
398 $omb['listenee'] = $user->nickname;
399 $omb['listener'] = omb_local_id($omb[OAUTH_ENDPOINT_REQUEST]);
400 $omb['token'] = $token;
401 $omb['secret'] = $secret;
402 # call doesn't work after bounce back so we cache; maybe serialization issue...?
403 $omb['access_token_url'] = omb_service_uri($omb[OAUTH_ENDPOINT_ACCESS]);
404 $omb['post_notice_url'] = omb_service_uri($omb[OMB_ENDPOINT_POSTNOTICE]);
405 $omb['update_profile_url'] = omb_service_uri($omb[OMB_ENDPOINT_UPDATEPROFILE]);
407 common_ensure_session();
409 $_SESSION['oauth_authorization_request'] = $omb;
411 # Redirect to authorization service
413 common_redirect($req->to_url());