Metacat

<?php

/*

License: LGPL as per: http://www.gnu.org/copyleft/lesser.html

$Id: proxy.php 3650 2007-11-28 00:26:06Z rdewit $

$Name$

*/

////////////////////////////////////////////////////////////////////////////////

// Description:

// Script to redirect the request http://host/proxy.php?url=http://someUrl

// to http://someUrl .

//

// This script can be used to circumvent javascript's security requirements

// which prevent a URL from an external web site being called.

//

// Author: Nedjo Rogers

////////////////////////////////////////////////////////////////////////////////

// read in the variables

if(array_key_exists('HTTP_SERVERURL', $_SERVER)){ 

  $onlineresource=$_SERVER['HTTP_SERVERURL']; 

}else{ 

  $onlineresource=$_REQUEST['url']; 

}

$parsed = parse_url($onlineresource);

$host = @$parsed["host"];

$path = @$parsed["path"] . "?" . @$parsed["query"];

if(empty($host)) {

  $host = "localhost";

}

$port = @$parsed['port'];

if(empty($port)){

  $port="80";

}

$contenttype = @$_REQUEST['contenttype'];

if(empty($contenttype)) {

  $contenttype = "text/xml";

}

$data = @$GLOBALS["HTTP_RAW_POST_DATA"];

// define content type

header("Content-type: " . $contenttype);

if(empty($data)) {

  $result = send_request();

}

else {

  // post XML

  $posting = new HTTP_Client($host, $port, $data);

  $posting->set_path($path);

  $result = $posting->send_request();

}

// strip leading text from result and output result

$len=strlen($result);

$pos = strpos($result, "<");

if($pos > 1) {

  $result = substr($result, $pos, $len);

}

//$result = str_replace("xlink:","",$result);

echo $result;

// define class with functions to open socket and post XML

// from http://www.phpbuilder.com/annotate/message.php3?id=1013274 by Richard Hundt

class HTTP_Client { 

  var $host; 

  var $path;

  var $port; 

  var $data; 

  var $socket; 

  var $errno; 

  var $errstr; 

  var $timeout; 

  var $buf; 

  var $result; 

  var $agent_name = "MyAgent"; 

  //Constructor, timeout 30s 

  function HTTP_Client($host, $port, $data, $timeout = 30) { 

    $this->host = $host; 

    $this->port = $port;

    $this->data = $data;

    $this->timeout = $timeout; 

  } 

  //Opens a connection 

  function connect() { 

    $this->socket = fsockopen($this->host, 

      $this->port, 

      $this->errno, 

      $this->errstr, 

      $this->timeout 

      ); 

    if(!$this->socket) 

      return false; 

    else 

      return true; 

  } 

  //Set the path 

  function set_path($path) { 

    $this->path = $path; 

  } 

  //Send request and clean up 

  function send_request() { 

    if(!$this->connect()) { 

      return false; 

    } 

    else { 

      $this->result = $this->request($this->data);

      return $this->result; 

    } 

  } 

  function request($data) { 

    $this->buf = ""; 

    fwrite($this->socket, 

      "POST $this->path HTTP/1.0\r\n". 

      "Host:$this->host\r\n". 

      "User-Agent: $this->agent_name\r\n". 

      "Content-Type: application/xml\r\n". 

      "Content-Length: ".strlen($data). 

      "\r\n". 

      "\r\n".$data. 

      "\r\n" 

    ); 

    while(!feof($this->socket)) 

      $this->buf .= fgets($this->socket, 2048); 

      $this->close(); 

      return $this->buf; 

  } 

  function close() {

    fclose($this->socket);

  } 

} 

function send_request() {

  global $onlineresource;

  $ch = curl_init();

  $timeout = 5; // set to zero for no timeout

  // fix to allow HTTPS connections with incorrect certificates

  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);

  curl_setopt ($ch, CURLOPT_URL,$onlineresource);

  curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);

  curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);

  curl_setopt ($ch, CURLOPT_ENCODING , "gzip, deflate");

  $file_contents = curl_exec($ch);

  curl_close($ch);

  $lines = array();

  $lines = explode("\n", $file_contents);

  if(!($response = $lines)) {

    echo "Unable to retrieve file '$service_request'";

  }

  $response = implode("",$response);

  return $response;

}

?>