plugins/OStatus/lib/salmonaction.php

   1 <?php
   2 /*
   3  * StatusNet - the distributed open-source microblogging tool
   4  * Copyright (C) 2010, StatusNet, 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 /**
  21  * @package OStatusPlugin
  22  * @author James Walker <james@status.net>
  23  */
  24
  25 if (!defined('STATUSNET')) {
  26     exit(1);
  27 }
  28
  29 class SalmonAction extends Action
  30 {
  31     var $xml      = null;
  32     var $activity = null;
  33     var $target   = null;
  34
  35     function prepare($args)
  36     {
  37         StatusNet::setApi(true); // Send smaller error pages
  38
  39         parent::prepare($args);
  40
  41         if ($_SERVER['REQUEST_METHOD'] != 'POST') {
  42             // TRANS: Client error. POST is a HTTP command. It should not be translated.
  43             $this->clientError(_m('This method requires a POST.'));
  44         }
  45
  46         if (empty($_SERVER['CONTENT_TYPE']) || $_SERVER['CONTENT_TYPE'] != 'application/magic-envelope+xml') {
  47             // TRANS: Client error. Do not translate "application/magic-envelope+xml"
  48             $this->clientError(_m('Salmon requires "application/magic-envelope+xml".'));
  49         }
  50
  51         $xml = file_get_contents('php://input');
  52
  53         // Check the signature
  54         $salmon = new Salmon;
  55         if (!$salmon->verifyMagicEnv($xml)) {
  56             common_log(LOG_DEBUG, "Salmon signature verification failed.");
  57             // TRANS: Client error.
  58             $this->clientError(_m('Salmon signature verification failed.'));
  59         } else {
  60             $magic_env = new MagicEnvelope();
  61             $env = $magic_env->parse($xml);
  62             $xml = $magic_env->unfold($env);
  63         }
  64
  65         $dom = DOMDocument::loadXML($xml);
  66         if ($dom->documentElement->namespaceURI != Activity::ATOM ||
  67             $dom->documentElement->localName != 'entry') {
  68             common_log(LOG_DEBUG, "Got invalid Salmon post: $xml");
  69             // TRANS: Client error.
  70             $this->clientError(_m('Salmon post must be an Atom entry.'));
  71         }
  72
  73         $this->activity = new Activity($dom->documentElement);
  74         return true;
  75     }
  76
  77     /**
  78      * Check the posted activity type and break out to appropriate processing.
  79      */
  80
  81     function handle($args)
  82     {
  83         StatusNet::setApi(true); // Send smaller error pages
  84
  85         common_log(LOG_DEBUG, "Got a " . $this->activity->verb);
  86         if (Event::handle('StartHandleSalmonTarget', array($this->activity, $this->target)) &&
  87             Event::handle('StartHandleSalmon', array($this->activity))) {
  88             switch ($this->activity->verb)
  89             {
  90             case ActivityVerb::POST:
  91                 $this->handlePost();
  92                 break;
  93             case ActivityVerb::SHARE:
  94                 $this->handleShare();
  95                 break;
  96             case ActivityVerb::FAVORITE:
  97                 $this->handleFavorite();
  98                 break;
  99             case ActivityVerb::UNFAVORITE:
 100                 $this->handleUnfavorite();
 101                 break;
 102             case ActivityVerb::FOLLOW:
 103             case ActivityVerb::FRIEND:
 104                 $this->handleFollow();
 105                 break;
 106             case ActivityVerb::UNFOLLOW:
 107                 $this->handleUnfollow();
 108                 break;
 109             case ActivityVerb::JOIN:
 110                 $this->handleJoin();
 111                 break;
 112             case ActivityVerb::LEAVE:
 113                 $this->handleLeave();
 114                 break;
 115             case ActivityVerb::UPDATE_PROFILE:
 116                 $this->handleUpdateProfile();
 117                 break;
 118             default:
 119                 // TRANS: Client exception.
 120                 throw new ClientException(_m("Unrecognized activity type."));
 121             }
 122             Event::handle('EndHandleSalmon', array($this->activity));
 123             Event::handle('EndHandleSalmonTarget', array($this->activity, $this->target));
 124         }
 125     }
 126
 127     function handlePost()
 128     {
 129         // TRANS: Client exception.
 130         throw new ClientException(_m("This target doesn't understand posts."));
 131     }
 132
 133     function handleFollow()
 134     {
 135         // TRANS: Client exception.
 136         throw new ClientException(_m("This target doesn't understand follows."));
 137     }
 138
 139     function handleUnfollow()
 140     {
 141         // TRANS: Client exception.
 142         throw new ClientException(_m("This target doesn't understand unfollows."));
 143     }
 144
 145     function handleFavorite()
 146     {
 147         // TRANS: Client exception.
 148         throw new ClientException(_m("This target doesn't understand favorites."));
 149     }
 150
 151     function handleUnfavorite()
 152     {
 153         // TRANS: Client exception.
 154         throw new ClientException(_m("This target doesn't understand unfavorites."));
 155     }
 156
 157     function handleShare()
 158     {
 159         // TRANS: Client exception.
 160         throw new ClientException(_m("This target doesn't understand share events."));
 161     }
 162
 163     function handleJoin()
 164     {
 165         // TRANS: Client exception.
 166         throw new ClientException(_m("This target doesn't understand joins."));
 167     }
 168
 169     function handleLeave()
 170     {
 171         // TRANS: Client exception.
 172         throw new ClientException(_m("This target doesn't understand leave events."));
 173     }
 174
 175     /**
 176      * Remote user sent us an update to their profile.
 177      * If we already know them, accept the updates.
 178      */
 179     function handleUpdateProfile()
 180     {
 181         $oprofile = Ostatus_profile::getActorProfile($this->activity);
 182         if ($oprofile) {
 183             common_log(LOG_INFO, "Got a profile-update ping from $oprofile->uri");
 184             $oprofile->updateFromActivityObject($this->activity->actor);
 185         } else {
 186             common_log(LOG_INFO, "Ignoring profile-update ping from unknown " . $this->activity->actor->id);
 187         }
 188     }
 189
 190     /**
 191      * @return Ostatus_profile
 192      */
 193     function ensureProfile()
 194     {
 195         $actor = $this->activity->actor;
 196         if (empty($actor->id)) {
 197             common_log(LOG_ERR, "broken actor: " . var_export($actor, true));
 198             common_log(LOG_ERR, "activity with no actor: " . var_export($this->activity, true));
 199             // TRANS: Exception.
 200             throw new Exception(_m('Received a salmon slap from unidentified actor.'));
 201         }
 202
 203         return Ostatus_profile::ensureActivityObjectProfile($actor);
 204     }
 205
 206     function saveNotice()
 207     {
 208         $oprofile = $this->ensureProfile();
 209         return $oprofile->processPost($this->activity, 'salmon');
 210     }
 211 }