code.delx.au - cgiproxy/blob - php/proxy.php

   1 <?php
   2
   3 function debugAndDie() {
   4         print "<pre>";
   5         print_r($_GET);
   6         print_r($_POST);
   7         print_r($_COOKIE);
   8         print_r($_SERVER);
   9         print_r(apache_request_headers());
  10         print "</pre>";
  11         die();
  12 }
  13
  14 function debug($msg) {
  15         $fp = fopen("/tmp/debug.log", "a");
  16         fwrite($fp, "===\n");
  17         fwrite($fp, $msg);
  18         fwrite($fp, "\n");
  19         fclose($fp);
  20 }
  21
  22 function getUrl($url) {
  23         if(isset($_SERVER["PATH_INFO"])) {
  24                 $url .= $_SERVER["PATH_INFO"];
  25         }
  26         $url = parse_url($url);
  27         if(!isset($url["port"])) {
  28                 $url["port"] = 80;
  29                 if($url["scheme"] == "https") {
  30                         $url["port"] = 443;
  31                 }
  32         }
  33         if(strlen($_SERVER["QUERY_STRING"]) > 0) {
  34                 $url["path"] = $url["path"] . "?" . $_SERVER["QUERY_STRING"];
  35         }
  36         return $url;
  37 }
  38
  39 function generateRequest($rmeth, $host, $path) {
  40         $crlf = "\r\n";
  41
  42         $req = $rmeth . " " . $path . " HTTP/1.0" . $crlf;
  43
  44         $headers = apache_request_headers();
  45         if(isset($headers["Host"])) {
  46                 $req .= "Host: " . $headers["Host"] . $crlf;
  47         }
  48         if(isset($headers["Cookie"])) {
  49                 $req .= "Cookie: " . $headers["Cookie"] . $crlf;
  50         }
  51         if(isset($headers["Cookie2"])) {
  52                 $req .= "Cookie2: " . $headers["Cookie2"] . $crlf;
  53         }
  54         if(isset($headers["Referer"])) {
  55                 $req .= "Referer: " . $headers["Referer"] . $crlf;
  56         }
  57         if(isset($headers["Content-Length"])) {
  58                 $req .= "Content-Length: " . $headers["Content-Length"] . $crlf;
  59         }
  60         if(isset($headers["Content-Type"])) {
  61                 $val = $headers["Content-Type"];
  62                 $val = str_replace("PHPHACK", "", $val);
  63                 $req .= "Content-Type: " . $headers["Content-Type"] . $crlf;
  64         }
  65
  66         $req .= $crlf;
  67
  68         return $req;
  69 }
  70
  71 function doProxy($scheme, $rmeth, $host, $port, $path)
  72 {
  73         $req = generateRequest($rmeth, $host, $path);
  74
  75         // Make the HTTP request
  76         $fp = fsockopen(($scheme == 'https' ? 'ssl://' : '') . $host, $port);
  77         if(!$fp) {
  78                 die("Could not connect to internal server!");
  79         }
  80         fwrite($fp, $req);
  81         if($rmeth == "POST") {
  82                 $fpi = fopen("php://input", "rb");
  83                 while(!feof($fpi)) {
  84                         fwrite($fp, fread($fpi, 1024));
  85                 }
  86                 fclose($fpi);
  87         }
  88
  89         $headers = array();
  90         $mode = 0;
  91         while(is_resource($fp) && $fp && !feof($fp)) {
  92                 // Parsing headers
  93                 if($mode == 0) {
  94                         // Grab a line
  95                         $line = fgets($fp);
  96
  97                         if(strlen(trim($line)) != 0) {
  98                                 array_push($headers, $line);
  99                         } else {
 100                                 $mode = 1;
 101                                 foreach($headers as $header) {
 102                                         header($header);
 103                                 }
 104                         }
 105                 }
 106                 // Body data!
 107                 else {
 108                         myPassThru($fp);
 109                 }
 110         }
 111
 112         fclose($fp);
 113 }
 114
 115 function myPassThru($fp) {
 116         $data = "";
 117         while(!feof($fp)) {
 118                 $data .= fread($fp, 1024);
 119         }
 120         $data = str_replace("enctype=\"multipart/form-data\"", "enctype=\"PHPHACKmultipart/form-data\"", $data);
 121         print $data;
 122 }
 123
 124 function main($basePath) {
 125         ///debugAndDie();
 126
 127         $u = getUrl($basePath);
 128         $rmeth = $_SERVER["REQUEST_METHOD"];
 129         doProxy($u["scheme"], $rmeth, $u["host"], $u["port"], $u["path"]);
 130 }
 131
 132 // Run!
 133 if(!isset($PROXY)) {
 134         die("No forwarding available!");
 135 }
 136
 137 main($PROXY);
 138
 139 ?>