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HomeBackend DevelopmentPHP Tutorial如何利用http协议发布博文评论_PHP

先给大家介绍下实现原理:

给博文提交评论的实质就是通过http协议服务器发送一个post请求。在发布评论前,我们需要做什么呢?对,是必须要登录的。但登录是另一件事情,我们这里先不讨论。用户登录后,服务器给客户端设置一个cookie。http是无状态的。也就是说客户端向服务器发送请求后,服务器返回响应。一次通信完成。服务器不会记得刚才是谁向自己发送请求。所以客户端需要拿着服务器给自己设定好的cookie向服务器发送请求并告知服务器自己的身份,服务器根据cookie产生响应。

准备工作:  

  为了完成本次测试,我又注册了一个博客园小号(DeanHuangChopper),登录博客园后,打开我博客(DeanChopper),随便打开我的一篇博文,例如《结合php ob函数理解缓冲机制》一文(我用的是火狐浏览器,最大优点是向服务器发送什么参数可以很直观地看出来了),打开开发者选项,准备记录发送评论的过程。我随便写一评论,发表评论。这一次请求通过已经开发者选项记录下来。

我们只需要关注请求头就好了。

  很明显,我们通过Http类的setHeader()方法设置好请求头信息,通过post()方法发送就可以了。我们先仔细分析下请求头信息。Host和Content-type,Contetn-length会默认通过http的一些方法设置好,我们可以不添加。但必须注意的是Content-type类型是"application/json; charset=UTF-8",有别于Http默认设置的“application/x-www-form-urlencoded”。请求体是json形式,而非数组形式,因而原来的Http post方法需要重新写一下。

public function post($body) {  
  $this->setLine('POST');

  // 重新设置content-type
  $this->setHeader('Content-Type:application/json; charset=UTF-8');
  
  // 跳过setBody方法
  // $this->setBody($body);
  $this->body[]=$body;

  // 计算content-length
  $this->setHeader('Content-length: ' . strlen($this->body[0]));

  $this->request();

  return $this->response;
 }

  在重新修改Http类后,我们便可以完成本文的主要代码的编写了。虽然按理论来说,设置头信息时只要设置cookie值就好了,但是将最好将头信息全部发送以提高成功率。

在发送评论之前,看一下发送的参数:

我们只需要将想要发送的内容填写到"body"后面就可以了。

  代码部分:

  最后是本文的主要代码:

<&#63;php

require "http.class.php";


$http=new Http('http://www.cnblogs.com/mvc/PostComment/Add.aspx');
//设置头信息
$http->setHeader('Accept-Language:zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3');
$http->setHeader('Accept-Language:zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3');
$http->setHeader('Accept-Encoding:gzip, deflate');
$http->setHeader('X-Requested-With:XMLHttpRequest');
$http->setHeader('Referer:http://www.cnblogs.com/DeanChopper/p/4688667.html');
$http->setHeader('Cookie:_ga=GA1.2.1359064105.1438444082; __gads=ID=e0c32fd6db6e2a6d:T=1438443900:S=ALNI_Mb6AAflcBD6gcdHgeE3IqVDJYnnjA; .CNBlogsCookie=C8013C91E54C151DEDA30E2C1E842982338C9054A8BB8639AC2DAB7578445BF1DF5BC49D39D8BE5FDAC33541CE4E4FA386CFD3F946EA1D79D1E34809A4CCBD7488A15641AEF685A6258CF3F03597BCAF50049F8C95A310076677598990FB2E4FB1E9671A; _5t_trace_sid=84a9ed0b086c2c127551cf911bec7b1d; _5t_trace_tms=1; _gat=1');
$http->setHeader('Pragma:no-cache');
$http->setHeader('Cache-Control:no-cache');

//设置请求体信息
$msg='{"blogApp":"DeanChopper","postId":4688667,"body":"测试内容","parentCommentId":0}';

//发送post请求
$http->post($msg);

echo 'OK';

  发送过程可能有点慢,请耐心等待。

以上介绍就是本文的全部内容,希望大家喜欢。

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