jappixmini/proxy.php

   1 <?php
   2
   3 /*
   4
   5 Jappix - An open social platform
   6 This is a PHP BOSH proxy
   7
   8 -------------------------------------------------
   9
  10 This file is dual-licensed under the MIT license (see MIT.txt) and the AGPL license (see jappix/COPYING).
  11 Authors: Vanaryon, Leberwurscht
  12
  13 */
  14
  15 // PHP base
  16 define('JAPPIX_BASE', './jappix');
  17
  18 // Get the configuration
  19 require_once('./jappix/php/functions.php');
  20 require_once('./jappix/php/read-main.php');
  21 require_once('./jappix/php/read-hosts.php');
  22
  23 // Optimize the page rendering
  24 hideErrors();
  25 compressThis();
  26
  27 // Not allowed?
  28 if(!BOSHProxy()) {
  29         header('Status: 403 Forbidden', true, 403);
  30         exit('HTTP/1.1 403 Forbidden');
  31 }
  32
  33 // custom BOSH host
  34 $HOST_BOSH = HOST_BOSH;
  35 if(isset($_GET['host_bosh']) && $_GET['host_bosh']) {
  36         $host_bosh = $_GET['host_bosh'];
  37         if (substr($host_bosh, 0, 7)==="http://" || substr($host_bosh, 0, 8)==="https://") {
  38                 $HOST_BOSH = $host_bosh;
  39         }
  40 }
  41
  42 // OPTIONS method?
  43 if($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
  44         // CORS headers
  45         header('Access-Control-Allow-Origin: *');
  46         header('Access-Control-Allow-Methods: GET, POST, OPTIONS');
  47         header('Access-Control-Allow-Headers: Content-Type');
  48         header('Access-Control-Max-Age: 31536000');
  49
  50         exit;
  51 }
  52
  53 // Read POST content
  54 $data = file_get_contents('php://input');
  55
  56 // POST method?
  57 if($data) {
  58         // CORS headers
  59         header('Access-Control-Allow-Origin: *');
  60         header('Access-Control-Allow-Headers: Content-Type');
  61
  62         $method = 'POST';
  63 }
  64
  65 // GET method?
  66 else if(isset($_GET['data']) && $_GET['data'] && isset($_GET['callback']) && $_GET['callback']) {
  67         $method = 'GET';
  68         $data = $_GET['data'];
  69         $callback = $_GET['callback'];
  70 }
  71
  72 // Invalid method?
  73 else {
  74         header('Status: 400 Bad Request', true, 400);
  75         exit('HTTP/1.1 400 Bad Request');
  76 }
  77
  78 // HTTP headers
  79 $headers = array('User-Agent: Jappix (BOSH PHP Proxy)', 'Connection: keep-alive', 'Content-Type: text/xml; charset=utf-8', 'Content-Length: '.strlen($data));
  80
  81 // CURL is better if available
  82 if(function_exists('curl_init'))
  83         $use_curl = true;
  84 else
  85         $use_curl = false;
  86
  87 // CURL caused problems for me
  88 $use_curl = false;
  89
  90 // CURL stream functions
  91 if($use_curl) {
  92         // Initialize CURL
  93         $connection = curl_init($HOST_BOSH);
  94
  95         // Set the CURL settings
  96         curl_setopt($connection, CURLOPT_HEADER, 0);
  97         curl_setopt($connection, CURLOPT_POST, 1);
  98         curl_setopt($connection, CURLOPT_POSTFIELDS, $data);
  99         curl_setopt($connection, CURLOPT_FOLLOWLOCATION, true);
 100         curl_setopt($connection, CURLOPT_HTTPHEADER, $headers);
 101         curl_setopt($connection, CURLOPT_VERBOSE, 0);
 102         curl_setopt($connection, CURLOPT_CONNECTTIMEOUT, 30);
 103         curl_setopt($connection, CURLOPT_TIMEOUT, 30);
 104         curl_setopt($connection, CURLOPT_SSL_VERIFYHOST, 0);
 105         curl_setopt($connection, CURLOPT_SSL_VERIFYPEER, 0);
 106         curl_setopt($connection, CURLOPT_RETURNTRANSFER, 1);
 107
 108         // Get the CURL output
 109         $output = curl_exec($connection);
 110 }
 111
 112 // Built-in stream functions
 113 else {
 114         // HTTP parameters
 115         $parameters = array('http' => array(
 116                                         'method' => 'POST',
 117                                         'content' => $data
 118                                       )
 119                       );
 120
 121         $parameters['http']['header'] = $headers;
 122
 123         // Change default timeout
 124         ini_set('default_socket_timeout', 30);
 125
 126         // Create the connection
 127         $stream = @stream_context_create($parameters);
 128         $connection = @fopen($HOST_BOSH, 'rb', false, $stream);
 129
 130         // Failed to connect!
 131         if($connection == false) {
 132                 header('Status: 502 Proxy Error', true, 502);
 133                 exit('HTTP/1.1 502 Proxy Error');
 134         }
 135
 136         // Allow stream blocking to handle incoming BOSH data
 137         @stream_set_blocking($connection, true);
 138
 139         // Get the output content
 140         $output = @stream_get_contents($connection);
 141 }
 142
 143 // Cache headers
 144 header('Cache-Control: no-cache, must-revalidate');
 145 header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
 146
 147 // POST output
 148 if($method == 'POST') {
 149         // XML header
 150         header('Content-Type: text/xml; charset=utf-8');
 151
 152         if(!$output)
 153                 echo('<body xmlns=\'http://jabber.org/protocol/httpbind\' type=\'terminate\'/>');
 154         else
 155                 echo($output);
 156 }
 157
 158 // GET output
 159 if($method == 'GET') {
 160         // JSON header
 161         header('Content-type: application/json');
 162
 163         // Encode output to JSON
 164         $json_output = json_encode($output);
 165
 166         if(($output == false) || ($output == '') || ($json_output == 'null'))
 167                 echo($callback.'({"reply":"<body xmlns=\'http:\/\/jabber.org\/protocol\/httpbind\' type=\'terminate\'\/>"});');
 168         else
 169                 echo($callback.'({"reply":'.$json_output.'});');
 170 }
 171
 172 // Close the connection
 173 if($use_curl)
 174         curl_close($connection);
 175 else
 176         @fclose($connection);
 177
 178 ?>