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   1  <?php
   2  /**

   3  * PHP HTTP Tools is a library for working with the http protocol

   4  * php_http_proxy represents a basic http proxy

   5  * @package php-http-tools

   6  * @version 0.3

   7  * @copyright (C) 2004 John Heinstein. All rights reserved

   8  * @license http://www.gnu.org/copyleft/lesser.html LGPL License

   9  * @author John Heinstein <johnkarl@nbnet.nb.ca>

  10  * @link http://www.engageinteractive.com/php_http_tools/ PHP HTTP Tools Home Page

  11  * PHP HTTP Tools are Free Software

  12  **/
  13  if (!defined('PHP_HTTP_TOOLS_INCLUDE_PATH')) {
  14      define('PHP_HTTP_TOOLS_INCLUDE_PATH', (dirname(__FILE__) . "/"));
  15  }
  16  
  17  require_once (PHP_HTTP_TOOLS_INCLUDE_PATH . 'php_http_client_generic.php');
  18  
  19  /**

  20  * An HTTP Proxy class

  21  *

  22  * @package php-http-tools

  23  * @author John Heinstein <johnkarl@nbnet.nb.ca>

  24  */
  25  class php_http_proxy extends php_http_client_generic {
  26  
  27      /**

  28      * HTTP Proxy constructor

  29      * @param string The client connection host name, with or without its protocol prefix

  30      * @param string The client connection path, not including the host name

  31      * @param int The port to establish the client connection on

  32      * @param int The timeout value for the client connection

  33      */
  34  	function php_http_proxy($host, $path = '/', $port = 80, $timeout = 0) {
  35          $this->php_http_client_generic($host, $path, $port, $timeout);
  36          $this->setHeaders();
  37      } //php_http_proxy

  38  
  39      /**

  40      * Sets the proxy timeout to the specified value

  41      * @param int The timeout value for the client connection

  42      */
  43  	function setTimeout($timeout) {
  44          $this->timeout = $timeout;
  45      } //setTimeout

  46  
  47      /**

  48      * Sets the proxy headers

  49      */
  50  	function setHeaders() {
  51          $this->setHeader('User-Agent', 'PHP-HTTP-Proxy-Client/0.1');
  52          $this->setHeader('Connection', 'Close');
  53      } //setHeaders

  54  
  55      /**

  56      * Specifies a user name and password for basic proxy authentication

  57      * @param string The user name for proxy authentication

  58      * @param string The password for proxy authentication

  59      */
  60  	function setProxyAuthorization($user, $password) {
  61          $encodedChallengeResponse = 'Basic ' . base64_encode($this->user . ':' . $this->password);
  62          $this->setHeader('Proxy-Authorization', $encodedChallengeResponse);
  63      } //setProxyAuthorization

  64  
  65      /**

  66      * Handler for customizing the HTTP GET call

  67      * @param string The target url

  68      */
  69  	function get_custom($filename) {
  70          $url = $this->connection->formatHost($filename);
  71          $sep = strpos($url, '/');
  72          $targetHost = substr($url, 0, $sep);
  73  
  74          $this->setHeader('Host', $targetHost);
  75      } //get_custom

  76  } //php_http_proxy

  77  
  78  ?>