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