简介

对于请求头部和相应头部的认识

请求头部

在http请求头部里面 含有的参数有(常用)：

1. Accept
2. Accept-Encoding
3. Accept-Language
4. Cache-Control
5. Connection
6. Host
7. Pragma
8. Upgrade-Insecure-Requests
9. User-Agent
10. Cookie
11. Content-Length
12. Content-Type
13. If-Match
14. If-Modified-Since
15. If-None-Match
16. Referrer

响应头部

1. Connection
2. Content-Encoding
3. Date
4. Transfer-Encoding
5. Accept-Ranges
6. Age
7. Cache-Control
8. Content-Length
9. Content-Type
10. Expires
11. Last-Modified
12. Pragma
13. Server
14. X-Powered-By
15. Set-Cookie
16. ETag