PHP反向代理类代码

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.shtmlclass 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;elsereturn $this->translateServer（$serverName）.$this->path."?".$_SERVER["QUERY_STRING"]; } function translateServer（$serverName） {$s = empty（$_SERVER["HTTPS"]） ? "" : （$_SERVER["HTTPS"] == "on"） ? "s" : "";$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: $this->version"）; preg_match（"/Set-Cookie:[^
]*/i",$this->resultHeader,$result）; foreach（$result as $i=>$value）{header（$result[$i]）; } preg_match（"/Content-Encoding:[^
]*/i",$this->resultHeader,$result）; foreach（$result as $i=>$value）{//header（$result[$i]）; } preg_match（"/Transfer-Encoding:[^
]*/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（"
", $headerString）;foreach（$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（$chunk） { echo sprintf（"%x
", strlen（$chunk））; echo $chunk; echo "
"; } 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; }}?>