actions/userauthorization.php

   1 <?php
   2 /**
   3  * Let the user authorize a remote subscription request
   4  *
   5  * PHP version 5
   6  *
   7  * @category Action
   8  * @package  StatusNet
   9  * @author   Evan Prodromou <evan@status.net>
  10  * @author   Robin Millette <millette@status.net>
  11  * @license  http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
  12  * @link     http://status.net/
  13  *
  14  * StatusNet - the distributed open-source microblogging tool
  15  * Copyright (C) 2008, 2009, StatusNet, Inc.
  16  *
  17  * This program is free software: you can redistribute it and/or modify
  18  * it under the terms of the GNU Affero General Public License as published by
  19  * the Free Software Foundation, either version 3 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU Affero General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU Affero General Public License
  28  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  29  */
  30
  31 if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
  32
  33 require_once INSTALLDIR.'/lib/omb.php';
  34 require_once INSTALLDIR.'/extlib/libomb/service_provider.php';
  35 require_once INSTALLDIR.'/extlib/libomb/profile.php';
  36 define('TIMESTAMP_THRESHOLD', 300);
  37
  38 class UserauthorizationAction extends Action
  39 {
  40     var $error;
  41     var $params;
  42
  43     function handle($args)
  44     {
  45         parent::handle($args);
  46
  47         if ($_SERVER['REQUEST_METHOD'] == 'POST') {
  48             /* Use a session token for CSRF protection. */
  49             $token = $this->trimmed('token');
  50             if (!$token || $token != common_session_token()) {
  51                 $srv = $this->getStoredParams();
  52                 $this->showForm($srv->getRemoteUser(), _('There was a problem ' .
  53                                         'with your session token. Try again, ' .
  54                                         'please.'));
  55                 return;
  56             }
  57             /* We've shown the form, now post user's choice. */
  58             $this->sendAuthorization();
  59         } else {
  60             if (!common_logged_in()) {
  61                 /* Go log in, and then come back. */
  62                 common_set_returnto($_SERVER['REQUEST_URI']);
  63
  64                 common_redirect(common_local_url('login'));
  65                 return;
  66             }
  67
  68             $user    = common_current_user();
  69             $profile = $user->getProfile();
  70             if (!$profile) {
  71                 common_log_db_error($user, 'SELECT', __FILE__);
  72                 $this->serverError(_('User without matching profile'));
  73                 return;
  74             }
  75
  76             /* TODO: If no token is passed the user should get a prompt to enter
  77                it according to OAuth Core 1.0. */
  78             try {
  79                 $this->validateOmb();
  80                 $srv = new OMB_Service_Provider(
  81                         profile_to_omb_profile($user->uri, $profile),
  82                         omb_oauth_datastore());
  83
  84                 $remote_user = $srv->handleUserAuth();
  85             } catch (Exception $e) {
  86                 $this->clearParams();
  87                 $this->clientError($e->getMessage());
  88                 return;
  89             }
  90
  91             $this->storeParams($srv);
  92             $this->showForm($remote_user);
  93         }
  94     }
  95
  96     function showForm($params, $error=null)
  97     {
  98         $this->params = $params;
  99         $this->error  = $error;
 100         $this->showPage();
 101     }
 102
 103     function title()
 104     {
 105         return _('Authorize subscription');
 106     }
 107
 108     function showPageNotice()
 109     {
 110         $this->element('p', null, _('Please check these details to make sure '.
 111                                     'that you want to subscribe to this ' .
 112                                     'user’s notices. If you didn’t just ask ' .
 113                                     'to subscribe to someone’s notices, '.
 114                                     'click “Reject”.'));
 115     }
 116
 117     function showContent()
 118     {
 119         $params = $this->params;
 120
 121         $nickname = $params->getNickname();
 122         $profile  = $params->getProfileURL();
 123         $license  = $params->getLicenseURL();
 124         $fullname = $params->getFullname();
 125         $homepage = $params->getHomepage();
 126         $bio      = $params->getBio();
 127         $location = $params->getLocation();
 128         $avatar   = $params->getAvatarURL();
 129
 130         $this->elementStart('div', array('class' => 'profile'));
 131         $this->elementStart('div', 'entity_profile vcard');
 132         $this->elementStart('a', array('href' => $profile,
 133                                             'class' => 'url'));
 134         if ($avatar) {
 135             $this->element('img', array('src' => $avatar,
 136                                         'class' => 'photo avatar',
 137                                         'width' => AVATAR_PROFILE_SIZE,
 138                                         'height' => AVATAR_PROFILE_SIZE,
 139                                         'alt' => $nickname));
 140         }
 141         $hasFN = ($fullname !== '') ? 'nickname' : 'fn nickname';
 142         $this->elementStart('span', $hasFN);
 143         $this->raw($nickname);
 144         $this->elementEnd('span');
 145         $this->elementEnd('a');
 146
 147         if (!is_null($fullname)) {
 148             $this->elementStart('dl', 'entity_fn');
 149             $this->elementStart('dd');
 150             $this->elementStart('span', 'fn');
 151             $this->raw($fullname);
 152             $this->elementEnd('span');
 153             $this->elementEnd('dd');
 154             $this->elementEnd('dl');
 155         }
 156         if (!is_null($location)) {
 157             $this->elementStart('dl', 'entity_location');
 158             $this->element('dt', null, _('Location'));
 159             $this->elementStart('dd', 'label');
 160             $this->raw($location);
 161             $this->elementEnd('dd');
 162             $this->elementEnd('dl');
 163         }
 164
 165         if (!is_null($homepage)) {
 166             $this->elementStart('dl', 'entity_url');
 167             $this->element('dt', null, _('URL'));
 168             $this->elementStart('dd');
 169             $this->elementStart('a', array('href' => $homepage,
 170                                                 'class' => 'url'));
 171             $this->raw($homepage);
 172             $this->elementEnd('a');
 173             $this->elementEnd('dd');
 174             $this->elementEnd('dl');
 175         }
 176
 177         if (!is_null($bio)) {
 178             $this->elementStart('dl', 'entity_note');
 179             $this->element('dt', null, _('Note'));
 180             $this->elementStart('dd', 'note');
 181             $this->raw($bio);
 182             $this->elementEnd('dd');
 183             $this->elementEnd('dl');
 184         }
 185
 186         if (!is_null($license)) {
 187             $this->elementStart('dl', 'entity_license');
 188             $this->element('dt', null, _('License'));
 189             $this->elementStart('dd', 'license');
 190             $this->element('a', array('href' => $license,
 191                                       'class' => 'license'),
 192                            $license);
 193             $this->elementEnd('dd');
 194             $this->elementEnd('dl');
 195         }
 196         $this->elementEnd('div');
 197
 198         $this->elementStart('div', 'entity_actions');
 199         $this->elementStart('ul');
 200         $this->elementStart('li', 'entity_subscribe');
 201         $this->elementStart('form', array('method' => 'post',
 202                                           'id' => 'userauthorization',
 203                                           'class' => 'form_user_authorization',
 204                                           'name' => 'userauthorization',
 205                                           'action' => common_local_url(
 206                                                          'userauthorization')));
 207         $this->hidden('token', common_session_token());
 208
 209         $this->submit('accept', _('Accept'), 'submit accept', null,
 210                       _('Subscribe to this user'));
 211         $this->submit('reject', _('Reject'), 'submit reject', null,
 212                       _('Reject this subscription'));
 213         $this->elementEnd('form');
 214         $this->elementEnd('li');
 215         $this->elementEnd('ul');
 216         $this->elementEnd('div');
 217         $this->elementEnd('div');
 218     }
 219
 220     function sendAuthorization()
 221     {
 222         $srv = $this->getStoredParams();
 223
 224         if (is_null($srv)) {
 225             $this->clientError(_('No authorization request!'));
 226             return;
 227         }
 228
 229         $accepted = $this->arg('accept');
 230         try {
 231             list($val, $token) = $srv->continueUserAuth($accepted);
 232         } catch (Exception $e) {
 233             $this->clientError($e->getMessage());
 234             return;
 235         }
 236         if ($val !== false) {
 237             common_redirect($val, 303);
 238         } elseif ($accepted) {
 239             $this->showAcceptMessage($token);
 240         } else {
 241             $this->showRejectMessage();
 242         }
 243     }
 244
 245     function showAcceptMessage($tok)
 246     {
 247         common_show_header(_('Subscription authorized'));
 248         $this->element('p', null,
 249                        _('The subscription has been authorized, but no '.
 250                          'callback URL was passed. Check with the site’s ' .
 251                          'instructions for details on how to authorize the ' .
 252                          'subscription. Your subscription token is:'));
 253         $this->element('blockquote', 'token', $tok);
 254         common_show_footer();
 255     }
 256
 257     function showRejectMessage()
 258     {
 259         common_show_header(_('Subscription rejected'));
 260         $this->element('p', null,
 261                        _('The subscription has been rejected, but no '.
 262                          'callback URL was passed. Check with the site’s ' .
 263                          'instructions for details on how to fully reject ' .
 264                          'the subscription.'));
 265         common_show_footer();
 266     }
 267
 268     function storeParams($params)
 269     {
 270         common_ensure_session();
 271         $_SESSION['userauthorizationparams'] = serialize($params);
 272     }
 273
 274     function clearParams()
 275     {
 276         common_ensure_session();
 277         unset($_SESSION['userauthorizationparams']);
 278     }
 279
 280     function getStoredParams()
 281     {
 282         common_ensure_session();
 283         $params = unserialize($_SESSION['userauthorizationparams']);
 284         return $params;
 285     }
 286
 287     function validateOmb()
 288     {
 289         $listener = $_GET['omb_listener'];
 290         $listenee = $_GET['omb_listenee'];
 291         $nickname = $_GET['omb_listenee_nickname'];
 292         $profile  = $_GET['omb_listenee_profile'];
 293
 294         $user = User::staticGet('uri', $listener);
 295         if (!$user) {
 296             throw new Exception(sprintf(_('Listener URI ‘%s’ not found here.'),
 297                                         $listener));
 298         }
 299
 300         if (strlen($listenee) > 255) {
 301             throw new Exception(sprintf(_('Listenee URI ‘%s’ is too long.'),
 302                                         $listenee));
 303         }
 304
 305         $other = User::staticGet('uri', $listenee);
 306         if ($other) {
 307             throw new Exception(sprintf(_('Listenee URI ‘%s’ is a local user.'),
 308                                         $listenee));
 309         }
 310
 311         $remote = Remote_profile::staticGet('uri', $listenee);
 312         if ($remote) {
 313             $sub             = new Subscription();
 314             $sub->subscriber = $user->id;
 315             $sub->subscribed = $remote->id;
 316             if ($sub->find(true)) {
 317                 throw new Exception('You are already subscribed to this user.');
 318             }
 319         }
 320
 321         if ($profile == common_profile_url($nickname)) {
 322             throw new Exception(sprintf(_('Profile URL ‘%s’ is for a local user.'),
 323                                         $profile));
 324
 325         }
 326
 327         $license      = $_GET['omb_listenee_license'];
 328         $site_license = common_config('license', 'url');
 329         if (!common_compatible_license($license, $site_license)) {
 330             throw new Exception(sprintf(_('Listenee stream license ‘%1$s’ is not ' .
 331                                           'compatible with site license ‘%2$s’.'),
 332                                         $license, $site_license));
 333         }
 334
 335         $avatar = $_GET['omb_listenee_avatar'];
 336         if ($avatar) {
 337             if (!common_valid_http_url($avatar) || strlen($avatar) > 255) {
 338                 throw new Exception(sprintf(_('Avatar URL ‘%s’ is not valid.'),
 339                                             $avatar));
 340             }
 341             $size = @getimagesize($avatar);
 342             if (!$size) {
 343                 throw new Exception(sprintf(_('Can’t read avatar URL ‘%s’.'),
 344                                             $avatar));
 345             }
 346             if (!in_array($size[2], array(IMAGETYPE_GIF, IMAGETYPE_JPEG,
 347                                           IMAGETYPE_PNG))) {
 348                 throw new Exception(sprintf(_('Wrong image type for avatar URL '.
 349                                               '‘%s’.'), $avatar));
 350             }
 351         }
 352     }
 353 }