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It fetches remote pages and translates all HTML tags of links and images, background image attributes and external style sheet references to use the URLs based on the current script URL.
gonxproxy.class.php
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<?php
/**
* gonxproxy class : Just a HTTP Proxy
*
* @package
* @author Ben Yacoub Hatem <hatem@php.net>
* @copyright Copyright (c) 2004
* @version $Id$ - 07/04/2004 13:48:08 - gonxproxy.class.php
* @access public
**/
class gonxproxy{
/**
* Constructor
* @access protected
*/
function gonxproxy(){
}
/**
*
* @access public
* @return void
**/
function version(){
return "1.0.1";
}
/**
* Return html form of GonxProxy
*
* @access public
* @return void
**/
function form(){
global $url;
if (!ereg("http",$url) and $url!="") {
$url = base64_decode($url);
}
return "\n\n<!-- GonxProxy Form -->
<style><!--
.gonxproxy {
background-color: #F6F6F6;
margin: 4px;
padding: 4px;
border: 1px solid #CCCCCC;
}
input.gonxproxy {
background-color: white;
border: 1px solid #CCCCCC;
}
//-->
</style>
<form method=get action=\"?\">
<table class=gonxproxy width=600 cellpadding=4 cellspacing=10>
<tr><td>
<input name=url value=\"$url\" size=70 class=gonxproxy>
<input type=submit class=gonxproxy value=Submit><br/><br/>
<input type=hidden name=proxy value=1>
<font size=1>GonxProxy version ".gonxproxy::version()." - Author : Ben Yacoub Hatem - Copyright © <a href=\"http://www.dynamix-tn.com/v2/home/\" target=_blank>Dynamix SARL</a> 2004-2005 </font>
</td></tr></table>
</form>
<!-- /GonxProxy Form -->\n\n";
}
/**
* Retreive a url
*
* @access public
* @return void
**/
function connect($_url){
$file = @fopen( $_url, "rb" );
if (!$file) {
return "<font size=2 color=red>Error while opening URL</font>";
}
$line = fread( $file, 1024 );
if( eregi( "html", $line ) ){
fclose( $file );
$html = implode('',@file($_url) );
return gonxproxy::parse_html($html,$_url);
} else {
echo $line;
fpassthru( $file );
@fclose( $file );
exit;
}
}
/**
* Parse a HTML Page, remove JScript, convert Urls and return it.
*
* @access public
* @return void
**/
function parse_html($_data,$_url){
$matches = preg_match_all( "/(href|src|background|@import) *=? *\"(.*)\"/Ui", $_data, $regs );
foreach($regs[2] as $k=>$v){
$_data = str_replace($v,gonxproxy::chg_url($v,$_url), $_data);
}
return $_data;
}
/**
* Convert an URL to a GONX formatted url
*
* Original function code is taken from GURL v2.1 BETA
* by Bob Matcuk (BMatcuk@Users.SourceForge.Net)
* http://gurl.sourceforge.net
*
* @access public
* @return void
**/
function chg_url($piece,$url){
$url_elements = explode("/",$url );
$url_file = ( preg_match( "/\/$/i", $url ) ) ? 0 : 1;
if( preg_match( "/(.*)\#(.*)/", $piece, $regs ) ){ // Links to an anchor (#)
return ( ( $regs[1] == "" ) ? "" : gonxproxy::chg_url( $regs[1],$url ) ) . "#" . $regs[2];
} else if( preg_match( "/http:\/\/(.*)/i", $piece, $regs ) ){ // http:// form
$piece = $regs[1];
} else if( preg_match( "/^\//i", $piece ) ){ // starts with / form
$piece = $url_elements[0] . $piece;
} else if( preg_match( "/^\.\/(.*)/i", $piece, $regs ) ){ // single dots
$piece = $regs[1];
if( $url_file ){
for( $i = sizeof( $url_elements ) - 2; $i >= 0; $i-- ){
$piece = $url_elements[$i] . "/" . $piece;
}
} else {
$piece = $url . $piece;
}
} else if( preg_match( "/^(\.\.\/)+(.*)/i", $piece, $regs ) ){ // double dots
$tok = explode( "/", $piece );
$i = 1 + sizeof( $tok ) - 2;
if( $url_file ){
$i++;
}
$piece = $regs[2];
if( sizeof( $url_elements ) <= $i ){
$piece = $url_elements[0] . "/" . $piece;
} else {
for( $j = sizeof( $url_elements ) - $i; $j >= 0; $j-- ){
$piece = $url_elements[$j] . "/" . $piece;
}
}
} else {
if( $url_file ){
for( $i = sizeof( $url_elements ) - 2; $i >= 0; $i-- ){
$piece = $url_elements[$i] . "/" . $piece;
}
} else {
$piece = $url . $piece;
}
}
if( !( preg_match( "/(\/$|\..+$)/i", $piece ) && preg_match( "/\//i", $piece ) ) ){ // must end in / or file extension
$piece .= "/";
}
if (substr($piece,strlen($piece)-1,1 )=="/") {
$piece = substr($piece,0,strlen($piece)-1 );
}
return "?url=".base64_encode($piece);
}
}
?> | |
Usage Example
| <?php
/**
* gonxproxy Index
*
* @package
* @author Ben Yacoub Hatem <hatem@php.net>
* @copyright Copyright (c) 2004
* @version $Id$ - 09/04/2004 14:45:36 - index.php
* @access public
**/
require_once("gonxproxy.class.php");
@error_reporting(0); // Don't report error
@extract($_GET); // if register globals if off
if (isset($url) and $url!="" and $proxy==1) {
$res = gonxproxy::connect($url);
} elseif(isset($url) and $url!="" and !isset($proxy)){
$res = gonxproxy::connect(base64_decode($url));
}
$res .= gonxproxy::form(); // Add GonxProxy form
echo $res;
?> | |
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