基于ASP的轻量级的基于PHP开发的Web代理KnProxy.zip

<?php /**************************** * Parser to parse a webpage ****************************/ class knParser{ var $url_prefix = ''; var $url=''; var $source=''; var $type=''; var $output=''; var $charset=''; var $extraParseEngine=false; var $stdEncoder=false; var $values=Array(); function __construct($page_url,$page_data,$url_prefix=""){ $this->url = $page_url; $this->source = $page_data; $this->stdEncoder = false; $this->url_prefix = $url_prefix; } function setMimeType($mime_type){ $mime_type=preg_replace('~;.*$~','',$mime_type); $this->type=preg_replace('~\s~','',$mime_type); } function getCharset($mime_raw,$page_raw){ $this->charset = preg_replace('~^(.*);\s*charset=(.*)$~','$1',$mime_raw); if($this->charset==""){ preg_match('~<\s*meta\s+http-equiv\s*=\s*"content-type".*content\s*=\s*".*;\s*charset=(.*)"~iUs',$page_raw,$pmatch); $this->charset = $pmatch[1]; } return $this->charset; } function setEncoder($encoder){ $this->stdEncoder = $encoder; } function set_value($name,$val){ $this->values[$name]=$val; } function get_value($name,$def){ if(isset($this->values[$name])) return $this->values[$name]; return $def; } function parse(){ switch($this->type){ case 'knproxy/noparse':$this->output = $this->source;break; case 'text/css':$this->parseCss();break; case 'text/javascript': case 'application/javascript': case 'application/x-javascript':$this->parseJS();break; case 'image/gif': case 'image/png': case 'image/jpeg':$this->output = $this->source;break; case 'text/html': default:$this->parseHTML();break; } if($this->extraParseEngine!=false && $this->extraParseEngine instanceof stdParseEngine){ $this->output = $this->extraParseEngine->parse($this->type,$this->url,$this->output); } if($this->get_value('use_page_encryption',false)){ if($this->stdEncoder->can('page_encrypt') && ($this->type=="text/html" || $this->type=="")){ $key = $this->stdEncoder->getKey(); $this->output = $this->stdEncoder->encrypt_page($this->output,$key); $this->set_value('key',$key); } } } function parseRawCSS($css){ $css = preg_replace_callback('~(url|src)\((.*)\)~iUs',array('self','parseSimpleURL'),$css); return $css; } function parseStyle($callback){ return $callback[1] . $callback[2]. $this->parseRawCSS($callback[3]) . $callback[2]; } function parseCss($source = false){ if(!$source) $css = $this->source; elseif(is_array($source)){ $heading = $source[1]; $css = $source[2]; } $css = $this->parseRawCSS($css); if(!$source) $this->output = $css; else return $heading . $css . '</style>'; } function parseJS(){ $this->output = $this->source;//NOT IMPLEMENTED YET } function parseHTML(){ //BY FAR THE MOST DIFFICULT $code = preg_replace_callback('~(href|src|codebase|url|action)\s*=\s*([\'\"])?(?(2) (.*?)\\2 | ([^\s\>]+))~isx',array('self','parseExtURL'),$this->source); $code = preg_replace_callback('~(<\s*style.*>)(.*)<\s*/\s*style\s*>~iUs',Array('self','parseCSS'),$code); $code = preg_replace_callback('~(style\s*=\s*)([\'\"])(.*)\2~iUs',Array('self','parseStyle'),$code); $this->output = $code; } function parseSimpleURL($matches){ $url = $matches[2]; $method = $matches[1]; $url = preg_replace('~^"(.*)"$~iUs','$1',$url);//REMOVE FILTERS if(strtolower(substr($url,0,5))=='data:') return $method . '(' . $url . ')'; $url = $this->url->getAbsolute($url); $encoder = $this->stdEncoder; if($encoder!=false){ $url = $this->url_prefix . $encoder->encode($url); } return $method . '(' . $url . ')'; } function parseExtURL($matches){ $method = $matches[1]; $delim = $matches[2]; if($delim=='') $url = $matches[4]; else $url = $matches[3]; if(strtolower(substr($url,0,11)) == 'javascript:' || $url[0]=='#' || strtolower(substr($url,0,5))=='data:'){ return $method . '=' . $delim . $url . $delim . ' ';//NO PARSE } $url = $this->url->getAbsolute($url); $encoder = $this->stdEncoder; if($encoder!=false){ $url = $this->url_prefix . $encoder->encode($url); } $new = $method . '=' . $delim . $url . $delim . ' '; return $new; } } ?>