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