发送http请求
构造referer信息
在Http协议中,头信息里,有一个重要的选项: Referer
Referer: 代表网页的来源,即上一页的地址
具体方法http.class.php
// 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 $errno = -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->url[‘query‘] . ‘ ‘. $this->version; } // 此方法负责写头信息 public function setHeader($headerline) { $this->header[] = $headerline; } // 此方法负责写主体信息 protected function setBody($body) { $this->body[] = http_build_query($body); } // 连接url public function conn($url) { $this->url = parse_url($url); // 判断端口 if(!isset($this->url[‘port‘])) { $this->url[‘port‘] = 80; } // 判断query if(!isset($this->url[‘query‘])) { $this->url[‘query‘] = ‘‘; } $this->fh = fsockopen($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 $this->response; } // 构造post查询的数据 public function post($body = array()) { $this->setLine(‘POST‘); // 设计content-type $this->setHeader(‘Content-type: application/x-www-form-urlencoded‘); // 设计主体信息,比GET不一样的地方 $this->setBody($body); // 计算content-length $this->setHeader(‘Content-length: ‘ . strlen($this->body[0])); $this->request(); return $this->response; } // 真正请求 public function request() { // 把请求行,头信息,实体信息 放在一个数组里,便于拼接 $req = array_merge($this->line,$this->header,array(‘‘),$this->body,array(‘‘)); //print_r($req); $req = implode(self::CRLF,$req); //echo $req; exit; fwrite($this->fh,$req); while(!feof($this->fh)) { $this->response .= fread($this->fh,1024); } $this->close(); // 关闭连接 } // 关闭连接 public function close() { fclose($this->fh); } } $http = new Http(‘http://localhost/apple.jpg‘); //本机服务器www目录下的apple.jpg图片 $http->setHeader(‘Referer: http://localhost‘); //构造Referer信息 $res = $http->get(); //print_r($res); file_put_contents(‘./aa.png‘,substr(strstr($res,"\r\n\r\n"),4));
时间: 2024-11-16 09:51:01