mod/fetch.php

   1 <?php
   2 /*
   3 This file is part of the Diaspora protocol. It is used for fetching single public posts.
   4 */
   5
   6 use Friendica\App;
   7 use Friendica\Core\L10n;
   8 use Friendica\Core\System;
   9 use Friendica\Protocol\Diaspora;
  10 use Friendica\Util\XML;
  11
  12 function fetch_init(App $a)
  13 {
  14
  15         if (($a->argc != 3) || (!in_array($a->argv[1], ["post", "status_message", "reshare"]))) {
  16                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.L10n::t('Not Found'));
  17                 killme();
  18         }
  19
  20         $guid = $a->argv[2];
  21
  22         // Fetch the item
  23         $item = q(
  24                 "SELECT `uid`, `title`, `body`, `guid`, `contact-id`, `private`, `created`, `app`, `location`, `coord`
  25                         FROM `item` WHERE `wall` AND NOT `private` AND `guid` = '%s' AND `network` IN ('%s', '%s') AND `id` = `parent` LIMIT 1",
  26                 dbesc($guid),
  27                 NETWORK_DFRN,
  28                 NETWORK_DIASPORA
  29         );
  30         if (!$item) {
  31                 $r = q(
  32                         "SELECT `author-link`
  33                         FROM `item` WHERE `uid` = 0 AND `guid` = '%s' AND `network` IN ('%s', '%s') AND `id` = `parent` LIMIT 1",
  34                         dbesc($guid),
  35                         NETWORK_DFRN,
  36                         NETWORK_DIASPORA
  37                 );
  38
  39                 if ($r) {
  40                         $parts = parse_url($r[0]["author-link"]);
  41                         $host = $parts["scheme"]."://".$parts["host"];
  42
  43                         if (normalise_link($host) != normalise_link(System::baseUrl())) {
  44                                 $location = $host."/fetch/".$a->argv[1]."/".urlencode($guid);
  45
  46                                 header("HTTP/1.1 301 Moved Permanently");
  47                                 header("Location:".$location);
  48                                 killme();
  49                         }
  50                 }
  51
  52                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.L10n::t('Not Found'));
  53                 killme();
  54         }
  55
  56         // Fetch some data from the author (We could combine both queries - but I think this is more readable)
  57         $r = q(
  58                 "SELECT `user`.`prvkey`, `contact`.`addr`, `user`.`nickname`, `contact`.`nick` FROM `user`
  59                 INNER JOIN `contact` ON `contact`.`uid` = `user`.`uid` AND `contact`.`self`
  60                 WHERE `user`.`uid` = %d",
  61                 intval($item[0]["uid"])
  62         );
  63
  64         if (!$r) {
  65                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.L10n::t('Not Found'));
  66                 killme();
  67         }
  68         $user = $r[0];
  69
  70         $status = Diaspora::buildStatus($item[0], $user);
  71         $xml = Diaspora::buildPostXml($status["type"], $status["message"]);
  72
  73         // Send the envelope
  74         header("Content-Type: application/magic-envelope+xml; charset=utf-8");
  75         echo Diaspora::buildMagicEnvelope($xml, $user);
  76
  77         killme();
  78 }