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Do a redirect when the post doesn't come from our system but we know where it comes...
[friendica.git] / 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 require_once("include/crypto.php");
6 require_once("include/diaspora.php");
7 require_once("include/xml.php");
8
9 function fetch_init($a){
10
11         if (($a->argc != 3) OR (!in_array($a->argv[1], array("post", "status_message", "reshare")))) {
12                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.t('Not Found'));
13                 killme();
14         }
15
16         $guid = $a->argv[2];
17
18         // Fetch the item
19         $item = q("SELECT `uid`, `title`, `body`, `guid`, `contact-id`, `private`, `created`, `app`, `location`, `coord`
20                         FROM `item` WHERE `wall` AND NOT `private` AND `guid` = '%s' AND `network` IN ('%s', '%s') AND `id` = `parent` LIMIT 1",
21                 dbesc($guid), NETWORK_DFRN, NETWORK_DIASPORA);
22         if (!$item) {
23                 $r = q("SELECT `author-link`
24                         FROM `item` WHERE `uid` = 0 AND `guid` = '%s' AND `network` IN ('%s', '%s') AND `id` = `parent` LIMIT 1",
25                         dbesc($guid), NETWORK_DFRN, NETWORK_DIASPORA);
26                 if ($r) {
27                         $parts = parse_url($r[0]["author-link"]);
28                         $host = $parts["scheme"]."://".$parts["host"];
29
30                         $location = $host."/fetch/".$a->argv[1]."/".$guid;
31
32                         header("HTTP/1.1 301 Moved Permanently");
33                         header("Location:".$location);
34                         killme();
35                 }
36
37                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.t('Not Found'));
38                 killme();
39         }
40
41         // Fetch some data from the author (We could combine both queries - but I think this is more readable)
42         $r = q("SELECT `user`.`prvkey`, `contact`.`addr`, `user`.`nickname`, `contact`.`nick` FROM `user`
43                 INNER JOIN `contact` ON `contact`.`uid` = `user`.`uid`
44                 WHERE `user`.`uid` = %d", intval($item[0]["uid"]));
45         if (!$r) {
46                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.t('Not Found'));
47                 killme();
48         }
49         $user = $r[0];
50
51         $status = diaspora::build_status($item[0], $user);
52         $xml = diaspora::build_post_xml($status["type"], $status["message"]);
53
54         // Send the envelope
55         header("Content-Type: application/magic-envelope+xml; charset=utf-8");
56         echo diaspora::build_magic_envelope($xml, $user);
57
58         killme();
59 }