043-socket编程发送GET请求

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格式乱 请看http://note.youdao.com/s/chq2jO79

 

php+socket请求原理

1:连接某URL的80端口(打开)

2:发送头信息(写)

3:读取网页内容(读)

 

 

 

GET方法

 

<?php /* PHP+socket编程 发送请求 要求能 模拟下载、注册、登陆、批量发帖 */ //http请求类的接口 interface proto{ //连接url function conn($url); //发送get查询 function get(); //发送post查询 function post(); //关闭连接 function close(); } Class Http implements Proto{ const CRLF ="\r\n"; protected $erron=-1; protected $errstr=''; protected $response=''; protected $url=null; protected $version='HTTP/1.1'; protected $fh=null; protected $line=array(); protected $header=array(); protected $body=array(); public function _construct($url){ $this->conn($url); $this->setHeader('Host:' .$this->url['host'] ); } //此方法负责写请求行 protected function setLine($method){ $this->Line[0]=$method . '' . $this->url['path'] . ' ' . $this->version; } //此方法负责写头信息 protected function setHeader($hederline){ $this->header[]=$headerline; } //此方法负责写主体信息 protected function setBody(){ } //连接url public function conn($url){ $this->url= parse_url($url); //判断端口 if(isset($this->url['port'])){ $this->url['port']=80; } $this->fh= fsockopen($this->url['host'],$this->url['port'],$this->errno,$this->errstr,3); } //构造get请求的数据 public function get(){ $this->setLine('GET'); $this->request(); return $this->response; } //构造post查询的数据 public function post(){ } //真正请求 public function request(){ //把请求行,头信息,实体信息,放在一个数组中,便于拼接 $req=array_merge($this->line,$this- >header,array(''),$this->body,array('')); //print_r($req); $req=implode(self::CRLF,$req); //echo $req; fwrite($this->fh,$req); while(!feof($this->fh)){ $this->response.=fread($this->fh,1024); } $this->close();//关闭连接 return $this->response; } //关闭连接 function close(){ } } /* $url='http://renjian.163.com/20/1019/11/FPA1LP5V000181RV.html'; $http=new Http($url); echo $http->get(); */

 

POST发送

 

<?php /* PHP+socket编程 发送请求 要求能 模拟下载、注册、登陆、批量发帖 */ //http请求类的接口 interface proto{ //连接url function conn($url); //发送get查询 function get(); //发送post查询 function post(); //关闭连接 function close(); } Class Http implements Proto{ const CRLF ="\r\n"; protected $erron=-1; protected $errstr=''; protected $response=''; protected $url=null; protected $version='HTTP/1.1'; protected $fh=null; protected $line=array(); protected $header=array(); protected $body=array(); public function _construct($url){ $this->conn($url); $this->setHeader('Host:' .$this->url['host'] ); } //此方法负责写请求行 protected function setLine($method){ $this->Line[0]=$method . '' . $this->url['path'] . ' ' . $this->version; } //此方法负责写头信息 protected function setHeader($hederline){ $this->header[]=$headerline; } //此方法负责写主体信息 protected function setBody($boby){ $this->boby[]=http_build_query($body); } //连接url public function conn($url){ $this->url= parse_url($url); //判断端口 if(isset($this->url['port'])){ $this->url['port']=80; } $this->fh= fsockopen($this->url['host'],$this->url['port'],$this->errno,$this->errstr,3); } //构造get请求的数据 public function get(){ $this->setLine('GET'); $this->request(); return $this->response; } //构造post查询的数据 public function post($boby=array()){ $this->setLine('POST'); //设计content-type $this->setHeader('Content-type:application/x-www-form-urlencoded') //设计主题信息,比GET不一样的地方 $this->setBoby($boby); $this->request(); //计算content-length $this->setHeader('Content-length:' . strlen($this->boby[0])) } //真正请求 public function request(){ //把请求行,头信息,实体信息,放在一个数组中,便于拼接 $req=array_merge($this->line,$this- >header,array(''),$this->boby,array('')); //print_r($req); $req=implode(self::CRLF,$req); //echo $req;exit; fwrite($this->fh,$req); while(!feof($this->fh)){ $this->response.=fread($this->fh,1024); } $this->close();//关闭连接 return $this->response; } //关闭连接 public function close(){ fclose($this->fh); } } /* $url='http://renjian.163.com/20/1019/11/FPA1LP5V000181RV.html'; $http=new Http($url); echo $http->get(); */ set_time_limit(0); $url='http://renjian.163.com/20/1019/11/FPA1LP5V000181RV.html'; for($i=1;$i<100;$i++){ $str=str_shuffle'abcdfghijkimnopqrst0776656'; $tit=substr($str,0,5); $con=substr($str,6,8); $http=new Http($url); echo $http->post(array('tit'=>$tit,'con'=>$con,'submit'=>'留言')); echo $tit,'-----------',$con,'<br />'; usleep(2000); }

 

 

无状态?

2次请求之间没有关系

?服务器如何记住一个客户?

cookie 模拟登录发贴,cookie可以记住用户

 

<?php require('./http.class.php') $http=new Http('http://home.verycd.com/cp.php?ac=pm&op=send&touid=0&pmid=0'); $http->setHeader('Referer: '); $http->setHeader('User-Agent: '); $http->setHeader('cookie: '); $msg =array( 'formhash'=>'4f23e777', 'message'=>'world', 'pmsubmit'=>'true', 'pmsubmit_btn'=>'发送', 'refer'=>'http://home.verycd.com/space.php?do=pm&filter=privatepm', 'username'=>'http接收' ); file_put_contents('./res.htlm' $http->post($msg )); echo '0k';

 

Http协议之referer防盗链

当我们在网页里引用站外图片时,会出现上述情况。那么服务器是怎么知道这个图片是在站外被引用的呢?

在Http协议中,头信息里有一个重要的选项:Referer,代表网页的来源,既上一页的地址,如果是直接在浏览器上输入地址,回车进来,则没有Referer。

配置apache服务器,用于图片防盗链?

原理:在web服务器层面,根据http协议的referer头信息来判断。如果来自站外,则统一重写到一个很小的防盗链图片上去。

具体步骤:1.打开apache重写模块mod_rewrite,2.在需要防盗链的网站或目录,写.htaccess文件,并指定防盗链规则,分析referer信息,如果不是来自本站,则重写。

重写规则:

①哪种情况下重写:是jpeg/jpg/gif/png图片时,referer头与localhost不匹配时重写,统一rewrite到某个防盗链图片

RewriteEngine OnRewrite Base /test RewriteCond %{REQUEST_FILENAME} .*\.(jpg|jpeg|gif|png) [NC] RewriteCond %{HTTP_REFERER} !localhost [NC] RewriteRule  .* no.png

伪造referer头采集防盗链图片:

 

<?php require('./http.class.php'); $http = new Http('http://localhost/test/test.jpg');    //图片路径 $http->setHeader('Referer: http://localhost');    //伪造referer $res = $http->get(); //应该判断路径或response的mime头信息,来确定图片的类型 file_put_contents('./aa.jpg',substr(strstr($res,"\r\n\r\n"),4));

 

 

 

 

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