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