~~~[purchase:500] https://www.kancloud.cn/zouke/http2/purchase ~~~
1.HTTP协议概念及工作流程
2.HTTP协议之方法与状态码
3.socket编程发送GET请求
4.socket编程批量发帖
5.http协议模拟登陆发帖
6.referer头与防盗链
7.http缓存详解
8.http内容压缩
9.comet反向ajax