改自PHP Reverse Proxy PRP，修改了原版中的一些错误，支持了文件上传以及上传文件类型识别，支持指定IP，自适应SAE环境。

使用方法

<?php $proxy=new PhpReverseProxy(); $proxy->port="8080"; $proxy->host="www.jb51.net"; //$proxy->ip="1.1.1.1"; $proxy->forward_path=""; $proxy->connect(); $proxy->output(); ?>

源代码

<?php //Source Code: http://www.xiumu.org/technology/php-reverse-proxy-class.shtml class PhpReverseProxy{ public $publicBaseURL; public $outsideHeaders; public $XRequestedWith; public $sendPost; public $port,$host,$ip,$content,$forward_path,$content_type,$user_agent, $XFF,$request_method,$IMS,$cacheTime,$cookie,$authorization; private $http_code,$lastModified,$version,$resultHeader; const chunkSize = 10000; function __construct(){ $this->version="PHP Reverse Proxy (PRP) 1.0"; $this->port="8080"; $this->host="127.0.0.1"; $this->ip=""; $this->content=""; $this->forward_path=""; $this->path=""; $this->content_type=""; $this->user_agent=""; $this->http_code=""; $this->XFF=""; $this->request_method="GET"; $this->IMS=false; $this->cacheTime=72000; $this->lastModified=gmdate("D, d M Y H:i:s",time()-72000)." GMT"; $this->cookie=""; $this->XRequestedWith = ""; $this->authorization = ""; } function translateURL($serverName) { $this->path=$this->forward_path.$_SERVER['REQUEST_URI']; if(IS_SAE) return $this->translateServer($serverName).$this->path; if($_SERVER['QUERY_STRING']=="") return $this->translateServer($serverName).$this->path; else return $this->translateServer($serverName).$this->path."".$_SERVER['QUERY_STRING']; } function translateServer($serverName) { $s = empty($_SERVER["HTTPS"]) ? '' : ($_SERVER["HTTPS"] == "on") "; $protocol = $this->left(strtolower($_SERVER["SERVER_PROTOCOL"]), "/").$s; if($this->port=="") return $protocol."://".$serverName; else return $protocol."://".$serverName.":".$this->port; } function left($s1, $s2) { return substr($s1, 0, strpos($s1, $s2)); } function preConnect(){ $this->user_agent=$_SERVER['HTTP_USER_AGENT']; $this->request_method=$_SERVER['REQUEST_METHOD']; $tempCookie=""; foreach ($_COOKIE as $i => $value) { $tempCookie=$tempCookie." $i=$_COOKIE[$i];"; } $this->cookie=$tempCookie; if(empty($_SERVER['HTTP_X_FORWARDED_FOR'])){ $this->XFF=$_SERVER['REMOTE_ADDR']; } else { $this->XFF=$_SERVER['HTTP_X_FORWARDED_FOR'].", ".$_SERVER['REMOTE_ADDR']; } } function connect(){ if(empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])){ $this->preConnect(); $ch=curl_init(); if($this->request_method=="POST"){ curl_setopt($ch, CURLOPT_POST,1); $postData = array(); $filePost = false; $uploadPath = 'uploads/'; if (IS_SAE) $uploadPath = SAE_TMP_PATH; if(count($_FILES)>0){ if(!is_writable($uploadPath)){ die('You cannot upload to the specified directory, please CHMOD it to 777.'); } foreach($_FILES as $key => $fileArray){ copy($fileArray["tmp_name"], $uploadPath . $fileArray["name"]); $proxyLocation = "@" . $uploadPath . $fileArray["name"] . ";type=" . $fileArray["type"]; $postData = array($key => $proxyLocation); $filePost = true; } } foreach($_POST as $key => $value){ if(!is_array($value)){ $postData[$key] = $value; } else{ $postData[$key] = serialize($value); } } if(!$filePost){ //$postData = http_build_query($postData); $postString = ""; $firstLoop = true; foreach($postData as $key => $value){ $parameterItem = urlencode($key)."=".urlencode($value); if($firstLoop){ $postString .= $parameterItem; } else{ $postString .= "&".$parameterItem; } $firstLoop = false; } $postData = $postString; } //echo print_r($postData); //curl_setopt($ch, CURLOPT_VERBOSE, 0); //curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible;)"); $this->sendPost = $postData; //var_dump(file_exists(str_replace('@','',$postData['imgfile'])));exit; curl_setopt($ch, CURLOPT_POSTFIELDS,$postData); //curl_setopt($ch, CURLOPT_POSTFIELDS,file_get_contents($proxyLocation)); //curl_setopt($ch, CURLOPT_POSTFIELDS,file_get_contents("php://input")); } //gets rid of mulitple ? in URL $translateURL = $this->translateURL(($this->ip)?$this->ip:$this->host); if(substr_count($translateURL, "")>1){ $firstPos = strpos($translateURL, "", 0); $secondPos = strpos($translateURL, "", $firstPos + 1); $translateURL = substr($translateURL, 0, $secondPos); } curl_setopt($ch,CURLOPT_URL,$translateURL); $proxyHeaders = array( "X-Forwarded-For: ".$this->XFF, "User-Agent: ".$this->user_agent, "Host: ".$this->host ); if(strlen($this->XRequestedWith)>1){ $proxyHeaders[] = "X-Requested-With: ".$this->XRequestedWith; //echo print_r($proxyHeaders); } curl_setopt($ch,CURLOPT_HTTPHEADER, $proxyHeaders); if($this->cookie!=""){ curl_setopt($ch,CURLOPT_COOKIE,$this->cookie); } curl_setopt($ch,CURLOPT_FOLLOWLOCATION,false); curl_setopt($ch,CURLOPT_AUTOREFERER,true); curl_setopt($ch,CURLOPT_HEADER,true); curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); $output=curl_exec($ch); $info = curl_getinfo( $ch ); curl_close($ch); $this->postConnect($info,$output); }else { $this->lastModified=$_SERVER['HTTP_IF_MODIFIED_SINCE']; $this->IMS=true; } } function postConnect($info,$output){ $this->content_type=$info["content_type"]; $this->http_code=$info['http_code']; //var_dump($info);exit; if(!empty($info['last_modified'])){ $this->lastModified=$info['last_modified']; } $this->resultHeader=substr($output,0,$info['header_size']); $content = substr($output,$info['header_size']); if($this->http_code=='200'){ $this->content=$content; }elseif( ($this->http_code=='302' || $this->http_code=='301') && isset($info['redirect_url'])){ $redirect_url = str_replace($this->host,$_SERVER['HTTP_HOST'],$info['redirect_url']); if (IS_SAE) $redirect_url = str_replace('http://fetchurl.sae.sina.com.cn/','',$info['redirect_url']); header("Location: $redirect_url"); exit; }elseif($this->http_code=='404'){ header("HTTP/1.1 404 Not Found"); exit("HTTP/1.1 404 Not Found"); }elseif($this->http_code=='500'){ header('HTTP/1.1 500 Internal Server Error'); exit("HTTP/1.1 500 Internal Server Error"); }else{ exit("HTTP/1.1 ".$this->http_code." Internal Server Error"); } } function output(){ $currentTimeString=gmdate("D, d M Y H:i:s",time()); $expiredTime=gmdate("D, d M Y H:i:s",(time()+$this->cacheTime)); $doOriginalHeaders = true; if($doOriginalHeaders){ if($this->IMS){ header("HTTP/1.1 304 Not Modified"); header("Date: Wed, $currentTimeString GMT"); header("Last-Modified: $this->lastModified"); header("Server: $this->version"); }else{ header("HTTP/1.1 200 OK"); header("Date: Wed, $currentTimeString GMT"); header("Content-Type: ".$this->content_type); header("Last-Modified: $this->lastModified"); header("Cache-Control: max-age=$this->cacheTime"); header("Expires: $expiredTime GMT"); header("Server: $this->version"); preg_match("/Set-Cookie:[^n]*/i",$this->resultHeader,$result); foreach($result as $i=>$value){ header($result[$i]); } preg_match("/Content-Encoding:[^n]*/i",$this->resultHeader,$result); foreach($result as $i=>$value){ //header($result[$i]); } preg_match("/Transfer-Encoding:[^n]*/i",$this->resultHeader,$result); foreach($result as $i=>$value){ //header($result[$i]); } echo($this->content); /* if(stristr($this->content, "error")){ echo print_r($this->sendPost); } */ } } else{ $headerString = $this->resultHeader; //string $headerArray = explode("n", $headerString); foreach($headerArray as $privHeader){ header($privHeader); } if(stristr($headerString, "Transfer-encoding: chunked")){ flush(); ob_flush(); $i = 0; $maxLen = strlen($this->content); while($i < $maxLen){ $endChar = $i + self::chunkSize; if($endChar >= $maxLen){ $endChar = $maxLen - 1; } $chunk = substr($this->content, $i, $endChar); $this->dump_chunk($chunk); flush(); ob_flush(); $i = $i + $endChar; } } else{ echo($this->content); } //echo "header: ".print_r($headerArray); //header($this->resultHeader); } } function dump_chunk($chunk) { echo sprintf("%xrn", strlen($chunk)); echo $chunk; echo "rn"; } function getOutsideHeaders(){ $headers = array(); foreach ($_SERVER as $name => $value){ if (substr($name, 0, 5) == 'HTTP_') { $name = str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5))))); $headers[$name] = $value; }elseif ($name == "CONTENT_TYPE") { $headers["Content-Type"] = $value; }elseif ($name == "CONTENT_LENGTH") { $headers["Content-Length"] = $value; }elseif(stristr($name, "X-Requested-With")) { $headers["X-Requested-With"] = $value; $this->XRequestedWith = $value; } } //echo print_r($headers); $this->outsideHeaders = $headers; return $headers; } } ?>