HTTP协议学习笔记之（三）socket发送get请求

socket发送get请求

使用GET采集163网站新闻信息###

<?php

/**
	PHP+scoket编程 发送HTTP请求
	
	使用GET采集网站信息
**/

//http请求类接口
interface Prote{
	//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 Prote{

	const CRLF = "\r\n";      //声明一个换行常量

	protected $errno  = -1;
	protected $errstr = '';

	protected $response = '';

	protected $fh     = null;
	protected $url    = array();   //存放url信息
	protected $line   = array();   //放置请求行
	protected $header = array();   //放置头信息
	protected $body   = array();   //放置主体信息

	public function __construct($url){
		$this->conn($url);
		$this->setHeader('Host:' . $this->url['host']);
	}	
	/**
	 * [setLine 此方法负责写请求行]
	 * @param [str] $method [description]
	 */
	protected function setLine($method){
		$this->line[0] = $method . ' ' .$this->url['path'] . ' ' . 'HTTP/1.1';
	}

	/**
	 * [setHeader 此方法负责写头信息]
	 * @param [type] $headerline [头信息]
	 */
	protected function setHeader($headerline){
		$this->header[] = $headerline;
	}

	//此方法负责写主体信息
	protected function setBody(){
		
	}

	/**
	 * [conn 连接url]
	 * @param  [type] $url [请求的地址]
	 * @return [type]      [description]
	 */
	public function conn($url){
		$this->url = parse_url($url);   //分析$url
		// 判断端口
		if(!isset($this->url['port'])){
			$this->url['port'] = 80;
		}
		$this->fh  = fsockopen($this->url['host'],$this->url['port'],$this->errno,$this->errstr,3);
		print_r($this->fh);
	}
	
	/**
	 * [get 构造get请求的数据]
	 * @return [type] [description]
	 */
	public function get(){
		$this->setLine('GET');
		$this->request();
		return $this->response;
	}
	
	/**
	 * [post 构造post查询的数据]
	 * @return [type] [description]
	 */
	public function post(){

	}
	
	/**
	 * [request 真正请求]
	 * @return [type] [description]
	 */
    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('')); 
    	$req = implode(self::CRLF,$req);
    	/**
    	 * 请求信息拼接结果
    	 * GET /17/0223/08/CDUQ91V100097U7T.html HTTP/1.1
    	 * Host: tech.163.com
    	 *
    	 * 
    	 */
    	fwrite($this->fh,$req); 

    	while(!feof($this->fh)){
    		$this->response .= fread($this->fh,1024);
    	}

    	$this->close();    //关闭连接

    }

    /**
     * 换行：
     * linux：\r
     * mac  : \n
     * window : \r\n
     * http标准协议：\r\n
     */

	//关闭连接
	public function close(){

	}
	
}

$url = "http://tech.163.com/17/0223/08/CDUQ91V100097U7T.html";

$http = new Http($url);
echo $http->get();