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($profile_url, array('allowed_schemes' => array('http', 'https')))) {
  79                         common_user_error(_('Invalid profile URL returned by server.'));
  80                         return;
  81                 }
  82
  83                 if ($profile_url == common_local_url('showstream', array('nickname' => $nickname))) {
  84                         common_user_error(_('You can use the local subscription!'));
  85                     return;
  86                 }
  87
  88                 common_debug('listenee: "'.$omb['listenee'].'"', __FILE__);
  89
  90                 $user = User::staticGet('nickname', $omb['listenee']);
  91
  92                 if (!$user) {
  93                         common_user_error(_('User being listened to doesn\'t exist.'));
  94                         return;
  95                 }
  96
  97                 $other = User::staticGet('uri', $omb['listener']);
  98
  99                 if ($other) {
 100                         common_user_error(_('You can use the local subscription!'));
 101                         return;
 102                 }
 103
 104                 $fullname = $req->get_parameter('omb_listener_fullname');
 105                 $homepage = $req->get_parameter('omb_listener_homepage');
 106                 $bio = $req->get_parameter('omb_listener_bio');
 107                 $location = $req->get_parameter('omb_listener_location');
 108                 $avatar_url = $req->get_parameter('omb_listener_avatar');
 109
 110                 list($newtok, $newsecret) = $this->access_token($omb);
 111
 112                 if (!$newtok || !$newsecret) {
 113                         common_user_error(_('Couldn\'t convert request tokens to access tokens.'));
 114                         return;
 115                 }
 116
 117                 # XXX: possible attack point; subscribe and return someone else's profile URI
 118
 119                 $remote = Remote_profile::staticGet('uri', $omb['listener']);
 120
 121                 if ($remote) {
 122                         $exists = true;
 123                         $profile = Profile::staticGet($remote->id);
 124                         $orig_remote = clone($remote);
 125                         $orig_profile = clone($profile);
 126                         # XXX: compare current postNotice and updateProfile URLs to the ones
 127                         # stored in the DB to avoid (possibly...) above attack
 128                 } else {
 129                         $exists = false;
 130                         $remote = new Remote_profile();
 131                         $remote->uri = $omb['listener'];
 132                         $profile = new Profile();
 133                 }
 134
 135                 $profile->nickname = $nickname;
 136                 $profile->profileurl = $profile_url;
 137
 138                 if ($fullname) {
 139                         $profile->fullname = $fullname;
 140                 }
 141                 if ($homepage) {
 142                         $profile->homepage = $homepage;
 143                 }
 144                 if ($bio) {
 145                         $profile->bio = $bio;
 146                 }
 147                 if ($location) {
 148                         $profile->location = $location;
 149                 }
 150
 151                 if ($exists) {
 152                         $profile->update($orig_profile);
 153                 } else {
 154                         $profile->created = DB_DataObject_Cast::dateTime(); # current time
 155                         $id = $profile->insert();
 156                         if (!$id) {
 157                                 common_server_error(_('Error inserting new profile'));
 158                                 return;
 159                         }
 160                         $remote->id = $id;
 161                 }
 162
 163                 if ($avatar_url) {
 164                         if (!$this->add_avatar($profile, $avatar_url)) {
 165                                 common_server_error(_('Error inserting avatar'));
 166                                 return;
 167                         }
 168                 }
 169
 170                 $remote->postnoticeurl = $omb['post_notice_url'];
 171                 $remote->updateprofileurl = $omb['update_profile_url'];
 172
 173                 if ($exists) {
 174                         if (!$remote->update($orig_remote)) {
 175                                 common_server_error(_('Error updating remote profile'));
 176                                 return;
 177                         }
 178                 } else {
 179                         $remote->created = DB_DataObject_Cast::dateTime(); # current time
 180                         if (!$remote->insert()) {
 181                                 common_server_error(_('Error inserting remote profile'));
 182                                 return;
 183                         }
 184                 }
 185
 186                 $sub = new Subscription();
 187                 $sub->subscriber = $remote->id;
 188                 $sub->subscribed = $user->id;
 189                 $sub->token = $newtok;
 190                 $sub->secret = $newsecret;
 191                 $sub->created = DB_DataObject_Cast::dateTime(); # current time
 192
 193                 if (!$sub->insert()) {
 194                         common_user_error(_('Couldn\'t insert new subscription.'));
 195                         return;
 196                 }
 197
 198                 # Notify user, if necessary
 199
 200                 mail_subscribe_notify_profile($user, $profile);
 201
 202                 # Clear the data
 203                 unset($_SESSION['oauth_authorization_request']);
 204
 205                 # If we show subscriptions in reverse chron order, this should
 206                 # show up close to the top of the page
 207
 208                 common_redirect(common_local_url('subscribers', array('nickname' =>
 209                                                                                                                          $user->nickname)));
 210         }
 211
 212         function add_avatar($profile, $url) {
 213                 $temp_filename = tempnam(sys_get_temp_dir(), 'listener_avatar');
 214                 copy($url, $temp_filename);
 215                 return $profile->setOriginal($temp_filename);
 216         }
 217
 218         function access_token($omb) {
 219
 220                 common_debug('starting request for access token', __FILE__);
 221
 222                 $con = omb_oauth_consumer();
 223                 $tok = new OAuthToken($omb['token'], $omb['secret']);
 224
 225                 common_debug('using request token "'.$tok.'"', __FILE__);
 226
 227                 $url = $omb['access_token_url'];
 228
 229                 common_debug('using access token url "'.$url.'"', __FILE__);
 230
 231                 # XXX: Is this the right thing to do? Strip off GET params and make them
 232                 # POST params? Seems wrong to me.
 233
 234                 $parsed = parse_url($url);
 235                 $params = array();
 236                 parse_str($parsed['query'], $params);
 237
 238                 $req = OAuthRequest::from_consumer_and_token($con, $tok, "POST", $url, $params);
 239
 240                 $req->set_parameter('omb_version', OMB_VERSION_01);
 241
 242                 # XXX: test to see if endpoint accepts this signature method
 243
 244                 $req->sign_request(omb_hmac_sha1(), $con, $tok);
 245
 246                 # We re-use this tool's fetcher, since it's pretty good
 247
 248                 common_debug('posting to access token url "'.$req->get_normalized_http_url().'"', __FILE__);
 249                 common_debug('posting request data "'.$req->to_postdata().'"', __FILE__);
 250
 251                 $fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
 252                 $result = $fetcher->post($req->get_normalized_http_url(),
 253                                                                  $req->to_postdata());
 254
 255                 common_debug('got result: "'.print_r($result,TRUE).'"', __FILE__);
 256
 257                 if ($result->status != 200) {
 258                         return NULL;
 259                 }
 260
 261                 parse_str($result->body, $return);
 262
 263                 return array($return['oauth_token'], $return['oauth_token_secret']);
 264         }
 265 }