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                 common_remove_magic_from_request();
  45                 $req = OAuthRequest::from_request();
  46
  47                 $token = $req->get_parameter('oauth_token');
  48
  49                 # I think this is the success metric
  50
  51                 if ($token != $omb['token']) {
  52                         common_user_error(_('Not authorized.'));
  53                         return;
  54                 }
  55
  56                 $version = $req->get_parameter('omb_version');
  57
  58                 if ($version != OMB_VERSION_01) {
  59                         common_user_error(_('Unknown version of OMB protocol.'));
  60                         return;
  61                 }
  62
  63                 $nickname = $req->get_parameter('omb_listener_nickname');
  64
  65                 if (!$nickname) {
  66                         common_user_error(_('No nickname provided by remote server.'));
  67                         return;
  68                 }
  69
  70                 $profile_url = $req->get_parameter('omb_listener_profile');
  71
  72                 if (!$profile_url) {
  73                         common_user_error(_('No profile URL returned by server.'));
  74                         return;
  75                 }
  76
  77                 if (!Validate::uri($profile_url, array('allowed_schemes' => array('http', 'https')))) {
  78                         common_user_error(_('Invalid profile URL returned by server.'));
  79                         return;
  80                 }
  81
  82                 if ($profile_url == common_local_url('showstream', array('nickname' => $nickname))) {
  83                         common_user_error(_('You can use the local subscription!'));
  84                     return;
  85                 }
  86
  87                 common_debug('listenee: "'.$omb['listenee'].'"', __FILE__);
  88
  89                 $user = User::staticGet('nickname', $omb['listenee']);
  90
  91                 if (!$user) {
  92                         common_user_error(_('User being listened to doesn\'t exist.'));
  93                         return;
  94                 }
  95
  96                 $other = User::staticGet('uri', $omb['listener']);
  97
  98                 if ($other) {
  99                         common_user_error(_('You can use the local subscription!'));
 100                         return;
 101                 }
 102
 103                 $fullname = $req->get_parameter('omb_listener_fullname');
 104                 $homepage = $req->get_parameter('omb_listener_homepage');
 105                 $bio = $req->get_parameter('omb_listener_bio');
 106                 $location = $req->get_parameter('omb_listener_location');
 107                 $avatar_url = $req->get_parameter('omb_listener_avatar');
 108
 109                 list($newtok, $newsecret) = $this->access_token($omb);
 110
 111                 if (!$newtok || !$newsecret) {
 112                         common_user_error(_('Couldn\'t convert request tokens to access tokens.'));
 113                         return;
 114                 }
 115
 116                 # XXX: possible attack point; subscribe and return someone else's profile URI
 117
 118                 $remote = Remote_profile::staticGet('uri', $omb['listener']);
 119
 120                 if ($remote) {
 121                         $exists = true;
 122                         $profile = Profile::staticGet($remote->id);
 123                         $orig_remote = clone($remote);
 124                         $orig_profile = clone($profile);
 125                         # XXX: compare current postNotice and updateProfile URLs to the ones
 126                         # stored in the DB to avoid (possibly...) above attack
 127                 } else {
 128                         $exists = false;
 129                         $remote = new Remote_profile();
 130                         $remote->uri = $omb['listener'];
 131                         $profile = new Profile();
 132                 }
 133
 134                 $profile->nickname = $nickname;
 135                 $profile->profileurl = $profile_url;
 136
 137                 if ($fullname) {
 138                         $profile->fullname = $fullname;
 139                 }
 140                 if ($homepage) {
 141                         $profile->homepage = $homepage;
 142                 }
 143                 if ($bio) {
 144                         $profile->bio = $bio;
 145                 }
 146                 if ($location) {
 147                         $profile->location = $location;
 148                 }
 149
 150                 if ($exists) {
 151                         $profile->update($orig_profile);
 152                 } else {
 153                         $profile->created = DB_DataObject_Cast::dateTime(); # current time
 154                         $id = $profile->insert();
 155                         if (!$id) {
 156                                 common_server_error(_('Error inserting new profile'));
 157                                 return;
 158                         }
 159                         $remote->id = $id;
 160                 }
 161
 162                 if ($avatar_url) {
 163                         if (!$this->add_avatar($profile, $avatar_url)) {
 164                                 common_server_error(_('Error inserting avatar'));
 165                                 return;
 166                         }
 167                 }
 168
 169                 $remote->postnoticeurl = $omb['post_notice_url'];
 170                 $remote->updateprofileurl = $omb['update_profile_url'];
 171
 172                 if ($exists) {
 173                         if (!$remote->update($orig_remote)) {
 174                                 common_server_error(_('Error updating remote profile'));
 175                                 return;
 176                         }
 177                 } else {
 178                         $remote->created = DB_DataObject_Cast::dateTime(); # current time
 179                         if (!$remote->insert()) {
 180                                 common_server_error(_('Error inserting remote profile'));
 181                                 return;
 182                         }
 183                 }
 184
 185         if ($user->hasBlocked($profile)) {
 186             $this->client_error(_('That user has blocked you from subscribing.'));
 187             return;
 188         }
 189
 190                 $sub = new Subscription();
 191                 $sub->subscriber = $remote->id;
 192                 $sub->subscribed = $user->id;
 193                 $sub->token = $newtok;
 194                 $sub->secret = $newsecret;
 195                 $sub->created = DB_DataObject_Cast::dateTime(); # current time
 196
 197                 if (!$sub->insert()) {
 198                         common_user_error(_('Couldn\'t insert new subscription.'));
 199                         return;
 200                 }
 201
 202                 # Notify user, if necessary
 203
 204                 mail_subscribe_notify_profile($user, $profile);
 205
 206                 # Clear the data
 207                 unset($_SESSION['oauth_authorization_request']);
 208
 209                 # If we show subscriptions in reverse chron order, this should
 210                 # show up close to the top of the page
 211
 212                 common_redirect(common_local_url('subscribers', array('nickname' =>
 213                                                                                                                          $user->nickname)));
 214         }
 215
 216         function add_avatar($profile, $url) {
 217                 $temp_filename = tempnam(sys_get_temp_dir(), 'listener_avatar');
 218                 copy($url, $temp_filename);
 219                 return $profile->setOriginal($temp_filename);
 220         }
 221
 222         function access_token($omb) {
 223
 224                 common_debug('starting request for access token', __FILE__);
 225
 226                 $con = omb_oauth_consumer();
 227                 $tok = new OAuthToken($omb['token'], $omb['secret']);
 228
 229                 common_debug('using request token "'.$tok.'"', __FILE__);
 230
 231                 $url = $omb['access_token_url'];
 232
 233                 common_debug('using access token url "'.$url.'"', __FILE__);
 234
 235                 # XXX: Is this the right thing to do? Strip off GET params and make them
 236                 # POST params? Seems wrong to me.
 237
 238                 $parsed = parse_url($url);
 239                 $params = array();
 240                 parse_str($parsed['query'], $params);
 241
 242                 $req = OAuthRequest::from_consumer_and_token($con, $tok, "POST", $url, $params);
 243
 244                 $req->set_parameter('omb_version', OMB_VERSION_01);
 245
 246                 # XXX: test to see if endpoint accepts this signature method
 247
 248                 $req->sign_request(omb_hmac_sha1(), $con, $tok);
 249
 250                 # We re-use this tool's fetcher, since it's pretty good
 251
 252                 common_debug('posting to access token url "'.$req->get_normalized_http_url().'"', __FILE__);
 253                 common_debug('posting request data "'.$req->to_postdata().'"', __FILE__);
 254
 255                 $fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
 256                 $result = $fetcher->post($req->get_normalized_http_url(),
 257                                                                  $req->to_postdata(),
 258                                  array('User-Agent' => 'Laconica/' . LACONICA_VERSION));
 259
 260                 common_debug('got result: "'.print_r($result,TRUE).'"', __FILE__);
 261
 262                 if ($result->status != 200) {
 263                         return NULL;
 264                 }
 265
 266                 parse_str($result->body, $return);
 267
 268                 return array($return['oauth_token'], $return['oauth_token_secret']);
 269         }
 270 }