1. The request header
Request header | describe | The sample |
---|---|---|
Accept |
A list of MIME types supported by the user agent | Accept: text/html,application/xhtml+xml,application/xml; Q = 0.9 |
Accept-Encoding |
Compression methods supported by user agents (priority) | Accept-Encoding: br, gzip, deflate |
Accept-Language |
Language expected by the user agent (priority) | Accept-Language: zh-CN,zh; Q = 0.9 |
Cache-Control |
Caching mechanisms | Cache-Control: max-age=0 |
Connection |
Persistent connection | Connection: keep-alive |
Cookie |
HTTP cookies | The server stores cookies to the client through set-cookie |
Host |
Host name + port number | Host: 127.0.0.1:8080 |
If-Match |
Request to specify an identifier resource | If-Match: "56a88df57772gt555gr5469a32ee75d65dcwq989" |
If-Modified-Since |
Requests a resource that has been modified at a specified time | If-Modified-Since: Wed, 19 Oct 2020 17:32:00 GMT |
If-None-Match |
Request an unspecified identifier resource | If-None-Match: "56a88df57772gt555gr5469a32ee75d65dcwq989" |
Upgrade-Insecure-Requests |
Clients preferentially accept encrypted and authenticated responses and support CSP | Upgrade-Insecure-Requests: 1 |
User-Agent |
The user agent | The user-agent: Safari / 537.36 |
vary |
Cache policies, often used for adaptive cache configuration and SEO | Vary: User-Agent |
2. The response headers
Response headers | describe | The sample |
---|---|---|
Allow |
Which request methods the server supports | Allow: POST,GET,OPTIONS |
Cache-Control |
Caching mechanisms | Cache-Control: public, max-age=3600 |
Connection |
Persistent connection | Connection: keep-alive |
Content-Encoding |
Content encoding mode | Content-Encoding: br |
Content-Type |
The MIME type of the content | Content-Type: text/html; charset=UTF-8 |
Date |
Message Creation time | Date: Sun, 28 Feb 2021 11:52:51 GMT |
Expires |
Resource Expiration time | Expires: Sun, 28 Feb 2021 12:52:51 GMT |
ETag |
Resource identifier | ETag: "56a88df57772gt555gr5469a32ee75d65dcwq989" |
Set-Cookie |
The server sends cookies to the client | Set-Cookie: token=6e204d9b-103a-431e-b8de-ba97b2d1; path=/; HttpOnly |