PHP实例开发源码——KnProxy PHP轻量级的基于Web代理.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 = $url_prefix; } function setPluginEngine($engine){ $engine->url = $this->url; $engine->url_prefix = $this->url_prefix; $engine->stdEncoder = $this->stdEncoder; $this->extraParseEngine=$engine; } function setMimeType($mime_type){ $mime_type=preg_replace('~;.*$~','',$mime_type); $this->type=preg_replace('~\s~','',$mime_type); } function setCharset($mime_raw,$page_raw){ if(preg_match('~^.*;\s*charset\s*=\s*([a-zA-Z0-9\-]*)\s*[;]*$~',$mime_raw,$matches)){ $this->charset = $matches[1]; } if($this->charset==""){ preg_match('~<meta.*charset=(.+)["\'].*\>~iUs',$page_raw,$pmatch); $this->charset = $pmatch[1]; } return $this->charset; } function setEncoder($encoder){ $this->stdEncoder = $encoder; } function convertCharset($to='UTF-8'){ if(function_exists('iconv')){ $this->output = iconv($this->get_value('charset_iconv','GBK'),$to . '//IGNORE//TRANSLIT',$this->output); }elseif(function_exists('mb_convert_encoding')){ $this->output = mb_convert_encoding($this->output,$to,$this->charset); }else{ //UNMODIFY return false; } return true; } function set_value($name,$val){ $this->values[$name]=$val; } function get_value($name,$def){ if(isset($this->values[$name])) return $this->values[$name]; return $def; } function parse(){ if($this->extraParseEngine!=false) $this->source = $this->extraParseEngine->pre($this->source,$this->type); switch($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->output = $this->extraParseEngine->post($this->output,$this->type); } if($this->get_value('use_page_encryption',false)){ if($this->stdEncoder->can('page_encrypt') && ($this->type=="text/html" || $this->type=="")){ $key = $this->stdEncoder->getKey(); if($this->charset=="gb2312") $this->convertCharset(); $this->output = $this->stdEncoder->encrypt_page($this->output,$key); $this->set_value('key',$key); } } } function parseRawCSS($css){ $css = preg_replace_callback('~(url|src)(\()\s*([^\s].*)\s*\)~iUs',array('self','parseSimpleURL'),$css); $css = preg_replace_callback('~(@import\s*)(["\'\(])\s*([^\s].*)\s*["\'\)]~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 = $this->source;//NOT IMPLEMENTED YET } function parseScriptTagURLReloc($url){ $delim = $url[1]; $urlA = $url[2]; $tmp = $this->decodeJSURL($urlA); $urlDec = $this->url->getAbsolute($tmp[0]); if($this->stdEncoder!=false) $urlDec = $this->stdEncoder->encode($urlDec); $urlDec = $this->escapeJS($this->url_prefix . $urlDec); return 'location.replace(' . $delim . $urlDec . $delim . ')'; } function parseScriptStrings($strings){ $str = $strings[2]; $str = preg_replace_callback('~(href|src|codebase|url|action)\s*=\s*([\'\"])?(?(2) (.*?)\\2 | ([^\s\>]+))~isx',array('self','parseExtURL'),$str); return $strings[1] . $str . $strings[1]; } function parseScriptTag($matches){ $tagInner = preg_replace('~#knproxy_script_lt#~iUs','<',$matches[2]); $tagInner = preg_replace('~\\\~','#knproxy_script_escape#',$tagInner);//REMOVE ESCAPES $tagInner = preg_replace_callback('~([\'\"])(.+)\\1~',Array('self','parseScriptStrings'),$tagInner); $tagInner = preg_replace_callback('~location\.replace\(([\'"])(.*)\1\)~iUs',Array('self','parseScriptTagURLReloc'),$tagInner); $tagInner = preg_replace('~#knproxy_script_escape#~','\\',$tagInner); return '<script' . $matches[1] . '>' . $tagInner . '</script>'; } function parseScriptPre($matches){ $tagInner = preg_replace('~<~iUs','#KNPROXY_SCRIPT_LT#',$matches[2]); return '<script' . $matches[1] . '>' . $tagInner . '</script>'; } function parseUrlHTML($match){ $is_pform=false; if(preg_match('~^\s*form~iUs',$match[1])){ //This is a form if(preg_match('~method\s*=~',$match[1])){ if(preg_match('~method\s*=\s*([\'\"]?)get~isx',$match[1])){ $match[1] = preg_replace('~(method)\s*=\s*([\'\"])?(?(2) (.*?)\\2 | ([^\s\>]+))~isx','$1="POST"',$match[1]); $is_pform = true; }else{ $is_pform = false; } }else{ $match[1].= ' method="POST"'; $is_pform=true; } } $code = preg_replace_callback('~(href|src|codebase|url|action)\s*=\s*([\'\"])?(?(2) (.*?)\\2 | ([^\s\>]+))~isx',array('self','parseExtURL'),$match[1]); $code = preg_replace_callback('~(style\s*=\s*)([\'\"])(.*)\2~iUs',Array('self','parseStyle'),$code); if($is_pform) return '<' . $code . '><input type="hidden" name="knproxy_gettopost" value="true">'; return '<' . $code . '>'; } function parseHTML(){ //BY FAR THE MOST DIFFICULT //ONLY GET IN TAG ITEMS $noJS = false;//FOR PREVENTING ERROR IN JS $code = preg_replace_callback('~<script([^>]*)>(.*)</script>~iUs',Array('self','parseScriptPre'),$this->source); if(preg_last_error()!=PREG_NO_ERROR){ $noJS = true; $code = $this->source; } //ABOVE LINE ESCAPES THE < (lesser than) in JS SCRIPTS $code = preg_replace_callback('~<([^!].*)>~iUs',Array('self','parseUrlHTML'),$code); if(defined('ALLOW_NAVBAR') && ALLOW_NAVBAR=="true") $code = preg_replace('~<\s*/\s*head\s*>~iUs','<script language="javascript">parent.fixed.document.getElementById(\'url_\').value=parent.fixed.knEncode.unBase64("' . base64_encode($this->url->output($this->url->base)) . '");</script></head>',$code); $code = preg_replace_callback('~(<\s*style[^>]*>)(.*)<\s*/style\s*>~iUs',Array('self','parseCSS'),$code); if(!$noJS){ $code = preg_replace_callback('~<script([^>]*)>(.*)<\s*/\s*script>~iUs',Array('self','parseScriptTag'),$code); } $this->output = $code; } function parseSimpleURL($matches){ $url = $matches[3]; $delimiter = $matches[2]; $method = $matches[1]; $url = preg_replace('~^"(.*)"$~iUs','$1',$url);//REMOVE FILTERS $url = preg_replace('~^\s*(.*)\s*$~iUs','$1',$url); $url = preg_replace('~^\'(.*)\'$~iUs','$1',$url); 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); } if($delimiter =='(' ) return $method . '(' . $url . ')'; else return $method . $delimiter . $url . $delimiter; } function decodeJSURL($jsURL){ $purl = preg_replace('~#knproxy_script_escape#~iUs','',$jsURL); if($purl[0]=='"' || $purl[0]=="'") $sep = $purl[0]; else $sep = ''; $purl = preg_replace('~["\']~iUs','',$purl); return Array($purl,$sep); } function escapeJS($text){ return preg_replace('~([/"\'])~','\\\$1',$text); } function parseExtURL($matches){ $method = $matches[1]; $delim = $matches[2]; if($delim=='') $url = $matches[4]; else $url = $matches[3]; if(substr($url,0,9)!='#knproxy_'){ if($url == ''