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"; $proxy->host="www.niaoge.com"; //$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") ? "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: $this->version");
preg_match("/Set-Cookie:[^\n]*/i",$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($chunk) {
echo sprintf("%x\r\n", strlen($chunk));
echo $chunk;
echo "\r\n";
}
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;
}
}
?>