php利用Nginx如何实现反向代理

我们要首先准备好环境，我准备好了nginx环境和apache的环境

apache是开的8080端口，nginx开的80端口

我们去配置一下nginx的配置文件，proxy_pass必须加上http

apache配置一虚拟主机，不详解说明怎样配置的虚拟主机，配置虚拟主机非常简单

我们在nginx目录下动手写一个php的文件

6

先在我们访问一下这个地址，nginx解析了html有解析了php，这样就实现了反向代理（静动分离）

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

?123456789 <?php $proxy=new PhpReverseProxy()$proxy->port="8080"$proxy->host="ww"//$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'])))exitcurl_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 } } ?>

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