actions/finishremotesubscribe.php

   1 <?php
   2 /*
   3  * Laconica - a distributed open-source microblogging tool
   4  * Copyright (C) 2008, Controlez-Vous, Inc.
   5  *
   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.
  10  *
  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.
  15  *
  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/>.
  18  */
  19
  20 if (!defined('LACONICA')) { exit(1); }
  21
  22 require_once(INSTALLDIR.'/lib/omb.php');
  23
  24 class FinishremotesubscribeAction extends Action {
  25
  26         function handle($args) {
  27
  28                 parent::handle($args);
  29
  30                 if (common_logged_in()) {
  31                         common_user_error(_('You can use the local subscription!'));
  32                     return;
  33                 }
  34
  35                 $omb = $_SESSION['oauth_authorization_request'];
  36
  37                 if (!$omb) {
  38                         common_user_error(_('Not expecting this response!'));
  39                         return;
  40                 }
  41
  42                 common_debug('stored request: '.print_r($omb,true), __FILE__);
  43
  44
  45                 common_remove_magic_from_request();
  46                 $req = OAuthRequest::from_request();
  47
  48                 $token = $req->get_parameter('oauth_token');
  49
  50                 # I think this is the success metric
  51
  52                 if ($token != $omb['token']) {
  53                         common_user_error(_('Not authorized.'));
  54                         return;
  55                 }
  56
  57                 $version = $req->get_parameter('omb_version');
  58
  59                 if ($version != OMB_VERSION_01) {
  60                         common_user_error(_('Unknown version of OMB protocol.'));
  61                         return;
  62                 }
  63
  64                 $nickname = $req->get_parameter('omb_listener_nickname');
  65
  66                 if (!$nickname) {
  67                         common_user_error(_('No nickname provided by remote server.'));
  68                         return;
  69                 }
  70
  71                 $profile_url = $req->get_parameter('omb_listener_profile');
  72
  73                 if (!$profile_url) {
  74                         common_user_error(_('No profile URL returned by server.'));
  75                         return;
  76                 }
  77
  78                 if (!Validate::uri($profile_url, array('allowed_schemes' => array('http', 'https')))) {
  79                         common_user_error(_('Invalid profile URL returned by server.'));
  80                         return;
  81                 }
  82
  83                 common_debug('listenee: "'.$omb['listenee'].'"', __FILE__);
  84
  85                 $user = User::staticGet('nickname', $omb['listenee']);
  86
  87                 if (!$user) {
  88                         common_user_error(_('User being listened to doesn\'t exist.'));
  89                         return;
  90                 }
  91
  92                 $fullname = $req->get_parameter('omb_listener_fullname');
  93                 $homepage = $req->get_parameter('omb_listener_homepage');
  94                 $bio = $req->get_parameter('omb_listener_bio');
  95                 $location = $req->get_parameter('omb_listener_location');
  96                 $avatar_url = $req->get_parameter('omb_listener_avatar');
  97
  98                 list($newtok, $newsecret) = $this->access_token($omb);
  99
 100                 if (!$newtok || !$newsecret) {
 101                         common_user_error(_('Couldn\'t convert request tokens to access tokens.'));
 102                         return;
 103                 }
 104
 105                 # XXX: possible attack point; subscribe and return someone else's profile URI
 106
 107                 $remote = Remote_profile::staticGet('uri', $omb['listener']);
 108
 109                 if ($remote) {
 110                         $exists = true;
 111                         $profile = Profile::staticGet($remote->id);
 112                         $orig_remote = clone($remote);
 113                         $orig_profile = clone($profile);
 114                         # XXX: compare current postNotice and updateProfile URLs to the ones
 115                         # stored in the DB to avoid (possibly...) above attack
 116                 } else {
 117                         $exists = false;
 118                         $remote = new Remote_profile();
 119                         $remote->uri = $omb['listener'];
 120                         $profile = new Profile();
 121                 }
 122
 123                 $profile->nickname = $nickname;
 124                 $profile->profileurl = $profile_url;
 125
 126                 if ($fullname) {
 127                         $profile->fullname = $fullname;
 128                 }
 129                 if ($homepage) {
 130                         $profile->homepage = $homepage;
 131                 }
 132                 if ($bio) {
 133                         $profile->bio = $bio;
 134                 }
 135                 if ($location) {
 136                         $profile->location = $location;
 137                 }
 138
 139                 if ($exists) {
 140                         $profile->update($orig_profile);
 141                 } else {
 142                         $profile->created = DB_DataObject_Cast::dateTime(); # current time
 143                         $id = $profile->insert();
 144                         if (!$id) {
 145                                 common_server_error(_('Error inserting new profile'));
 146                                 return;
 147                         }
 148                         $remote->id = $id;
 149                 }
 150
 151                 if ($avatar_url) {
 152                         if (!$this->add_avatar($profile, $avatar_url)) {
 153                                 common_server_error(_('Error inserting avatar'));
 154                                 return;
 155                         }
 156                 }
 157
 158                 $remote->postnoticeurl = $omb['post_notice_url'];
 159                 $remote->updateprofileurl = $omb['update_profile_url'];
 160
 161                 if ($exists) {
 162                         if (!$remote->update($orig_remote)) {
 163                                 common_server_error(_('Error updating remote profile'));
 164                                 return;
 165                         }
 166                 } else {
 167                         $remote->created = DB_DataObject_Cast::dateTime(); # current time
 168                         if (!$remote->insert()) {
 169                                 common_server_error(_('Error inserting remote profile'));
 170                                 return;
 171                         }
 172                 }
 173
 174                 $sub = new Subscription();
 175                 $sub->subscriber = $remote->id;
 176                 $sub->subscribed = $user->id;
 177                 $sub->token = $newtok;
 178                 $sub->secret = $newsecret;
 179                 $sub->created = DB_DataObject_Cast::dateTime(); # current time
 180
 181                 if (!$sub->insert()) {
 182                         common_user_error(_('Couldn\'t insert new subscription.'));
 183                         return;
 184                 }
 185
 186                 # Notify user, if necessary
 187
 188                 mail_subscribe_notify_profile($user, $profile);
 189
 190                 # Clear the data
 191                 unset($_SESSION['oauth_authorization_request']);
 192
 193                 # If we show subscriptions in reverse chron order, this should
 194                 # show up close to the top of the page
 195
 196                 common_redirect(common_local_url('subscribers', array('nickname' =>
 197                                                                                                                          $user->nickname)));
 198         }
 199
 200         function add_avatar($profile, $url) {
 201                 $temp_filename = tempnam(sys_get_temp_dir(), 'listener_avatar');
 202                 copy($url, $temp_filename);
 203                 return $profile->setOriginal($temp_filename);
 204         }
 205
 206         function access_token($omb) {
 207
 208                 common_debug('starting request for access token', __FILE__);
 209
 210                 $con = omb_oauth_consumer();
 211                 $tok = new OAuthToken($omb['token'], $omb['secret']);
 212
 213                 common_debug('using request token "'.$tok.'"', __FILE__);
 214
 215                 $url = $omb['access_token_url'];
 216
 217                 common_debug('using access token url "'.$url.'"', __FILE__);
 218
 219                 # XXX: Is this the right thing to do? Strip off GET params and make them
 220                 # POST params? Seems wrong to me.
 221
 222                 $parsed = parse_url($url);
 223                 $params = array();
 224                 parse_str($parsed['query'], $params);
 225
 226                 $req = OAuthRequest::from_consumer_and_token($con, $tok, "POST", $url, $params);
 227
 228                 $req->set_parameter('omb_version', OMB_VERSION_01);
 229
 230                 # XXX: test to see if endpoint accepts this signature method
 231
 232                 $req->sign_request(omb_hmac_sha1(), $con, $tok);
 233
 234                 # We re-use this tool's fetcher, since it's pretty good
 235
 236                 common_debug('posting to access token url "'.$req->get_normalized_http_url().'"', __FILE__);
 237                 common_debug('posting request data "'.$req->to_postdata().'"', __FILE__);
 238
 239                 $fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
 240                 $result = $fetcher->post($req->get_normalized_http_url(),
 241                                                                  $req->to_postdata());
 242
 243                 common_debug('got result: "'.print_r($result,TRUE).'"', __FILE__);
 244
 245                 if ($result->status != 200) {
 246                         return NULL;
 247                 }
 248
 249                 parse_str($result->body, $return);
 250
 251                 return array($return['oauth_token'], $return['oauth_token_secret']);
 252         }
 253 }