HTTP协议分析系列（五）------php+socket编程发送http请求

来源：互联网发布：东莞房价知乎编辑：程序博客网时间：2024/06/06 15:05

一、PHP+socket请求原理

二、模拟POST请求

三、封装自己的HTTP类

[php] view plain copy

//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->version;
}
//此方法负责写头信息
protected 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
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
function get(){
$this->setLine('GET');
$this->request();
return $this->response;
}
//构造post请求的数据
function post($body=array()){
//构造主体信息
$this->setLine('POST');
//设置content-type
$this->setHeader('Content-type:application/x-www-form-urlencoded');
//设置主体信息，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
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(''));
$req=implode(self::CRLF,$req);
fwrite($this->fh,$req);
while(!feof($this->fh)){
$this->response.=fread($this->fh,1024);
}
$this->close();//关闭连接
return $this->response;
}
//关闭连接
function close(){
fclose($this->fh);
}
}

四、测试功能，实现批量发帖功能

（一）、建立数据表

（二）、程序实现

（1）、建立liuyanben.php

[php] view plain copy

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
<?php
$link=mysql_connect('localhost','root','root');
mysql_select_db('test');
mysql_set_charset('utf8');
if(!empty($_POST)){
$sql="insert liuyanben(id,title,content) values(null,'{$_POST['title']}','{$_POST['content']}')";
mysql_query($sql);
}
$sql="select * from liuyanben";
$result=mysql_query($sql);
while($row=mysql_fetch_assoc($result)){
$list[]=$row;
}
?>
<form method='post' action='liuyanben.php'>
<table border='1'>
<tr>
<td>编号</td>
<td>标题</td>
<td>内容</td>
</tr>
<?php
foreach($list as $key=>$value){
?>
<tr>
<td><?php echo $value['id'];?></td>
<td><?php echo $value['title'];?></td>
<td><?php echo $value['content'];?></td>
</tr>
<?php
}
?>
</table>
<input type='text' name='title'><br/>
<input type='text' name='content'><br/>
<input type='submit' value='提交'>
</form>
</body>
</html>

(2).实现批量发帖

[php] view plain copy

set_time_limit(0);
$url='http://localhost/socket/liuyanben.php';
for($i=1;$i<100;$i++){
$str=str_shuffle('abcdefghigklmnopqrstuvwxyz');
$title=substr($str,0,5);
$content=substr($str,6,8);
$http=new Http($url);
$http->post(array('title'=>$title,'content'=>$content,'submit'=>'留言'));
echo $title.'--------'.$con.'<br/>';
usleep(2000);
}

（三）、实验结果

查看页面

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