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         $item = q("SELECT `uid`, `title`, `body`, `guid`, `contact-id`, `private`, `created`, `app`, `location`, `coord`
  19                         FROM `item` WHERE `wall` AND NOT `private`  AND `guid` = '%s' AND `network` IN ('%s', '%s') AND `id` = `parent` LIMIT 1",
  20                 dbesc($guid), NETWORK_DFRN, NETWORK_DIASPORA);
  21         if (!$item) {
  22                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.t('Not Found'));
  23                 killme();
  24         }
  25         $post = array();
  26
  27         $reshared = diaspora::is_reshare($item[0]["body"]);
  28
  29         if ($reshared) {
  30                 $nodename = "reshare";
  31                 $post["root_diaspora_id"] = $reshared["root_handle"];
  32                 $post["root_guid"] = $reshared["root_guid"];
  33                 $post["guid"] = $item[0]["guid"];
  34                 $post["diaspora_handle"] = diaspora::handle_from_contact($item[0]["contact-id"]);
  35                 $post["public"] = (!$item[0]["private"] ? 'true':'false');
  36                 $post["created_at"] = datetime_convert('UTC','UTC',$item[0]["created"]);
  37         } else {
  38
  39                 $location = array();
  40
  41                 if ($item[0]["location"] != "")
  42                         $location["address"] = $item[0]["location"];
  43
  44                 if ($item[0]["coord"] != "") {
  45                         $coord = explode(" ", $item[0]["coord"]);
  46                         $location["lat"] = $coord[0];
  47                         $location["lng"] = $coord[1];
  48                 }
  49
  50                 $body = bb2diaspora($item[0]["body"]);
  51
  52                 if(strlen($item[0]["title"]))
  53                         $body = "## ".html_entity_decode($item[0]["title"])."\n\n".$body;
  54
  55                 $nodename = "status_message";
  56                 $post["raw_message"] = str_replace("&", "&amp;", $body);
  57                 $post["location"] = $location;
  58                 $post["guid"] = $item[0]["guid"];
  59                 $post["diaspora_handle"] = diaspora::handle_from_contact($item[0]["contact-id"]);
  60                 $post["public"] = (!$item[0]["private"] ? 'true':'false');
  61                 $post["created_at"] = datetime_convert('UTC','UTC',$item[0]["created"]);
  62                 $post["provider_display_name"] = $item[0]["app"];
  63         }
  64
  65         $data = array("XML" => array("post" => array($nodename => $post)));
  66         $xml = xml::from_array($data, $xmlobj);
  67
  68         $r = q("SELECT `user`.`prvkey`, `contact`.`addr`, `user`.`nickname`, `contact`.`nick` FROM `user`
  69                 INNER JOIN `contact` ON `contact`.`uid` = `user`.`uid`
  70                 WHERE `user`.`uid` = %d", intval($item[0]["uid"]));
  71         if (!$r) {
  72                 header($_SERVER["SERVER_PROTOCOL"].' 404 '.t('Not Found'));
  73                 killme();
  74         }
  75
  76         $user = $r[0];
  77
  78         $b64url_data = base64url_encode($xml);
  79         $data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
  80
  81         $key_id = base64url_encode(diaspora::my_handle($user));
  82         $type = "application/xml";
  83         $encoding = "base64url";
  84         $alg = "RSA-SHA256";
  85         $signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
  86         $signature = rsa_sign($signable_data, $user["prvkey"]);
  87         $sig = base64url_encode($signature);
  88
  89         $xmldata = array("me:env" => array("me:data" => $data,
  90                                                         "@attributes" => array("type" => $type),
  91                                                         "me:encoding" => $encoding,
  92                                                         "me:alg" => $alg,
  93                                                         "me:sig" => $sig,
  94                                                         "@attributes2" => array("key_id" => $key_id)));
  95
  96         $namespaces = array("me" => "http://salmon-protocol.org/ns/magic-env");
  97
  98         //header("Content-Type: application/xml; charset=utf-8");
  99         //echo $xml;
 100         //killme();
 101
 102         $envelope = xml::from_array($xmldata, $xml, false, $namespaces);
 103         header("Content-Type: application/magic-envelope+xml; charset=utf-8");
 104         echo $envelope;
 105         killme();
 106 }