用PHP写自定义的简单WEB服务器

用PHP实现的自定义的简单WEB服务器

这儿主要是运用PHP中的socket编程来实现，PHP脚本是运行在命令行中的，是不依赖其他的WEB服务器而独立运行的

<?php/** * @socket 通信的整个过程 * @socket_create   //创建套接字 * @socket_bind     //绑定IP和端口 * @socket_listen   //监听相应端口 * @socket_accept   //接收请求 * @socket_read     //获取请求内容 * @socket_write    //返回数据 * @socket_close    //关闭连接 */class MyServer{    private $ip;    private $port;    private $webroot;    //将常用的MIME类型保存在一个数组中    private $contentType=array(        ".html"=>"text/html",        ".htm"=>"text/html",        ".xhtml"=>"text/html",        ".xml"=>"text/html",        ".php"=>"text/html",        ".java"=>"text/html",        ".jsp"=>"text/html",        ".css"=>"text/css",        ".ico"=>"image/x-icon",        ".jpg"=>"application/x-jpg",        ".jpeg"=>"image/jpeg",        ".png"=>"application/x-png",        ".gif"=>"image/gif",        ".pdf"=>"application/pdf",        );    public function__construct($ip="10.`.66.149",$port=65500){        set_time_limit(0);        $this->ip=$ip;        $this->port=$port;        $this->webroot=__DIR__.'/www';        echo "\nServer init sucess\n";    }    public function listen(){        $socket=socket_create(AF_INET,SOCK_STREAM,SOL_TCP);        if(!$socket)            echo "CREATE ERROR:".socket_strerror(socket_last_error()).'\n';        $bool=socket_bind($socket,$this->ip,$this->port);        if(!$bool)            echo "BIND ERROR:".socket_strerror(socket_last_error()).'\n';        while(true){            $bool=socket_listen($socket);            if(!$bool)                echo "LISTEN ERROR:".socket_strerror(socket_last_error()).'\n';            $new_socket=socket_accept($socket);            if(!$new_socket)                echo "ACCPET ERROR:".socket_strerror(socket_last_error()).'\n';            $string=socket_read($new_socket,20480);            $data=$this->request($string);            $num=socket_write($new_socket,$data);            if($num==0)                echo "WRITE ERROR:".socket_strerror(socket_last_error())."\n";            else                echo "request already succeed\n";            socket_close($new_socket);        }    }    /**     * [读取get或post请求中的url，返回相应的文件]     * @param  [string]     * @return [string]     * http头     * method url protocols     */    public function request($string){        echo $string;        $pattern="/\s+/";        $request=preg_split($pattern,$string);        if(count($request)<3)            return "request error\n";        $filename=$this->webroot.$request[1];        echo "filename:".$filename."\n";        $type=$this->setContentType($filename);        if(file_exists($filename)){            $data=file_get_contents($filename);            return $this->addHeader($request[2],200,"OK",$data,$type);        }        else{            $data="this resource is not exists";            return $this->addHeader($request[2],1000,"not exists",$data,$type);        }    }    private function addHeader($protocol,$state,$desc,$str,$type){         return "{$protocol} {$state} {$desc}\r\nContent-type:{$type}\r\n"."Content-Length:".            strlen($str)."\r\nServer:MyServer\r\n\r\n".$str;    }    private function setContentType($filename){        $type=substr($filename,strpos($filename,'.'));        if(isset($this->contentType[$type]))            return $this->contentType[$type];        else            return "text/html";    }}$server=new MyServer();$server->listen();   //调用listen方法，使脚本处于监听状态