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