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 require_once "include/crypto.php";
  12
  13 function fetch_init(App $a)
  14 {
  15
  16         if (($a->argc != 3) || (!in_array($a->argv[1], array("post", "status_message", "reshare")))) {
  17                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.t('Not Found'));
  18                 killme();
  19         }
  20
  21         $guid = $a->argv[2];
  22
  23         // Fetch the item
  24         $item = q(
  25                 "SELECT `uid`, `title`, `body`, `guid`, `contact-id`, `private`, `created`, `app`, `location`, `coord`
  26                         FROM `item` WHERE `wall` AND NOT `private` AND `guid` = '%s' AND `network` IN ('%s', '%s') AND `id` = `parent` LIMIT 1",
  27                 dbesc($guid),
  28                 NETWORK_DFRN,
  29                 NETWORK_DIASPORA
  30         );
  31         if (!$item) {
  32                 $r = q(
  33                         "SELECT `author-link`
  34                         FROM `item` WHERE `uid` = 0 AND `guid` = '%s' AND `network` IN ('%s', '%s') AND `id` = `parent` LIMIT 1",
  35                         dbesc($guid),
  36                         NETWORK_DFRN,
  37                         NETWORK_DIASPORA
  38                 );
  39
  40                 if ($r) {
  41                         $parts = parse_url($r[0]["author-link"]);
  42                         $host = $parts["scheme"]."://".$parts["host"];
  43
  44                         if (normalise_link($host) != normalise_link(System::baseUrl())) {
  45                                 $location = $host."/fetch/".$a->argv[1]."/".urlencode($guid);
  46
  47                                 header("HTTP/1.1 301 Moved Permanently");
  48                                 header("Location:".$location);
  49                                 killme();
  50                         }
  51                 }
  52
  53                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.t('Not Found'));
  54                 killme();
  55         }
  56
  57         // Fetch some data from the author (We could combine both queries - but I think this is more readable)
  58         $r = q(
  59                 "SELECT `user`.`prvkey`, `contact`.`addr`, `user`.`nickname`, `contact`.`nick` FROM `user`
  60                 INNER JOIN `contact` ON `contact`.`uid` = `user`.`uid` AND `contact`.`self`
  61                 WHERE `user`.`uid` = %d",
  62                 intval($item[0]["uid"])
  63         );
  64
  65         if (!$r) {
  66                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.t('Not Found'));
  67                 killme();
  68         }
  69         $user = $r[0];
  70
  71         $status = Diaspora::buildStatus($item[0], $user);
  72         $xml = Diaspora::buildPostXml($status["type"], $status["message"]);
  73
  74         // Send the envelope
  75         header("Content-Type: application/magic-envelope+xml; charset=utf-8");
  76         echo Diaspora::buildMagicEnvelope($xml, $user);
  77
  78         killme();
  79 }