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  Classes of Andrey Nikishaev  >  Little PHP Proxy  >  proxy.php  
File: proxy.php
Role: Application script
Content type: text/plain
Description: php proxy
Class: Little PHP Proxy
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Contents

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<?php
/*

  Little PHP Proxy V1.0701

*/
class little_php_proxy {
       var $DOMAIN;
       var $POSTURL;
       var $PURL=array();
       var $RESPONSE=array();

       public function __construct() {
             define(HOST,$_SERVER['SERVER_NAME'].$_SERVER['PHP_SELF']);
       }

       public function close() {
               unlink(session_id());session_destroy();header('Location: /');
       }

       public function query($U,$POST,$GET,$FILES,$COOKIE='') {


            if(count($POST)) {

                foreach($POST as $key => $value) {
                if($key!='u' && $key!='c') $POSTVARS.=$key."=".$value."&";
                }
                if($POSTVARS) $posted=1;
            }

            if(count($FILES)) {
                $files=1;
                foreach($FILES as $key => $value) {
                $POSTVARS.=$key."=@".$value['tmp_name']."&";
                }
            }

            $POSTVARS=$POSTVARS?substr($POSTVARS,0,-1):'';

            $U=urldecode($U);
            if(!eregi('[.]+',$U)) $U=base64_decode($U);
            if(!eregi('^(http|ftp|https)',$U)) $U='http://'.$U;
            $this->POSTURL=$U;
            foreach($GET as $k=>$v) {
            if($k!='u' && $k!='c') $this->POSTURL.='&'.$k.'='.$v;
            }
            $this->PURL=parse_url($U);
            $this->DOMAIN=$this->PURL['host'].$this->PURL['path'];
            if(ereg('.',$this->PURL['path'])) $this->DOMAIN=ereg_replace('/[^\/]*$','',$this->DOMAIN);
             define(PHOST,$this->PURL['host']);
             define(DOMAIN,$this->DOMAIN);
             $ch = curl_init($this->POSTURL);
             if($posted) curl_setopt($ch, CURLOPT_POST,                                                0);
                           curl_setopt($ch, CURLOPT_VERBOSE,                                          0);
                         curl_setopt($ch, CURLOPT_USERAGENT,                      $_SERVER['user-agent']);
             if($posted) curl_setopt($ch, CURLOPT_POSTFIELDS,                                $POSTVARS);
             if($files)  curl_setopt($ch, CURLOPT_UPLOAD,                                            1);
                         curl_setopt($ch, CURLOPT_FOLLOWLOCATION,                                    1);
                         curl_setopt($ch, CURLOPT_BINARYTRANSFER,                                     1);
                         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,                                     0);
                         curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,                                     0);
                         curl_setopt($ch, CURLOPT_REFERER,                               "http://".$this->DOMAIN);
                         curl_setopt($ch, CURLOPT_CONNECTTIMEOUT,                                     0);
                         curl_setopt($ch, CURLOPT_AUTOREFERER,                                        0);
                         curl_setopt($ch, CURLOPT_COOKIEJAR,                       'ses_'.session_id());
                         curl_setopt($ch, CURLOPT_COOKIEFILE,                       'ses_'.session_id());
                         if(strlen($COOKIE)>0) curl_setopt($ch, CURLOPT_COOKIE,          $COOKIE);
                         curl_setopt($ch, CURLOPT_RETURNTRANSFER,                                    1);
                         curl_setopt($ch, CURLOPT_FAILONERROR,                                      1);


             $this->CONTENT = curl_exec($ch);
             $this->RESPONSE=curl_getinfo($ch);
             curl_close($ch);
       }

       public function getPage() {
                if(ereg('html',$this->RESPONSE['content_type'])) {
                     $this->get_html();
                     $this->get_css();
             } elseif (ereg('image',$this->RESPONSE['content_type'])){
                    $this->get_image();
             } elseif (ereg('javascript',$this->RESPONSE['content_type'])){
                    $this->get_javascript();
             } elseif (ereg('css',$this->RESPONSE['content_type'])){
                    $this->get_css();
             } else {
                    $this->get_file();
             }
             header("Content-Type: ".$this->RESPONSE['content_type']);
             if(eregi('image/([a-z]+)',$this->RESPONSE['content_type'],$type)) {
                  $newImg = imagecreatefromstring($this->CONTENT);
                 if($type[1]="jpeg")imagejpeg($newImg,'',100);
                 if($type[1]="png")imagegif($newImg,'',100);
                 if($type[1]="gif")imagepng($newImg,'',100);
             } else {
                 echo $this->CONTENT;
             }
       }

       public function get_file() {

       }

       public function get_image() {

       }

       public function get_javascript() {
            $patern=array(
            '/([\"]+)([^\"\s]*)([\"]+)/i',
            '/([\']+)([^\'\s]*)([\']+)/i'
             );
            function replace_js($m) {
                  $d='';
                  if(eregi('^\/',$m[2])) {
                          $d='http://'.PHOST;$ok=1;
                  } else {
                            if(!eregi('^(htt|ftp)',$m[2]) && eregi('/',$m[2])) {$d='http://'.DOMAIN.'/';$ok=1;}
                  }
                  if($ok) {
                          return $m[1].'http://'.HOST.'?u='.base64_encode($d.$m[2]).$m[1];
                  } else {
                        return $m[1].$m[2].$m[1];
                  }

             }
            $this->CONTENT=preg_replace_callback($patern,"replace_js",$this->CONTENT);
       }

       public function get_css() {
              $patern=array(
              '/url\([\s]*[\'\"\`]?([^\)\s\'\"\`]+)[\'\"\`]?[\s]*\)/i'
              );
              function replace_css($m) {
                  $d='';
                  if(eregi('^\/',$m[1])) {
                          $d='http://'.PHOST;$ok=1;
                  } else {
                            if(!eregi('^(htt|ftp)',$m[1])) {
                            $d='http://'.DOMAIN.'/';$ok=1;
                        } else {
                            $ok=1;
                        }
                  }

              if($ok) {
                      return 'url(http://'.HOST.'?u='.base64_encode($d.$m[1]).')';
              }


             }
            $this->CONTENT=preg_replace_callback($patern,"replace_css",$this->CONTENT);
       }

       public function get_html() {
               $patern=array(
            '/[\s]+(src|href|url|location|background|action)[\s]*=[\s]*([\'\"\`])?[\s]*([^\'\"\`\s>]+)([\'\"\`>])?/i',
            '/([\"]+)(\/[^\"\s]*)([\"]+)/i',
            '/([\']+)(\/[^\'\s]*)([\']+)/i'
             );
             function replace_html($m) {
              $d='';
            if($m[1]=='"' || $m[1]=="'") {
            if(eregi('^\/',$m[2])) {
                  $d='http://'.PHOST;$ok=1;
              } else {
                    if(!eregi('^(htt|ftp)',$m[2]) && eregi('/',$m[2])) {$d='http://'.DOMAIN.'/';$ok=1;}
              }
             if($ok) {return $m[1].'http://'.HOST.'?u='.base64_encode($d.$m[2]).$m[1];}
                else {
                    return $m[1].$m[2].$m[1];
            }

            } else {
              if($m[4]=='>') $e=">";
              if(eregi('^\/',$m[3])) {
                  $d='http://'.PHOST;
             } else {
                    if(!eregi('^(htt|ftp)',$m[3])) $d='http://'.DOMAIN.'/';
              }
            if(!ereg('^java',$m[3])) {
                    return ' '.$m[1].'="http://'.HOST.'?u='.base64_encode($d.$m[3]).'"'.$e;
            } else {
                    return ' '.$m[1].'="'.$m[3].'"';
            }
            }
             }
             $this->CONTENT=preg_replace_callback($patern,'replace_html',$this->CONTENT);
       }
} 

session_start();
    
        $P=new little_php_proxy();
        $P->query($_REQUEST['u'],$_POST,$_GET,$_FILES,$_POST['c']);
        $P->getPage();






?>