HTTP protocol and http protocol details

HTTP protocol and http protocol details

HTTP protocol

Purpose: Describe the protocol for data transmission between the client and the server.

Full name: Hypertext Transfer Protocol

Common versions: 1.0 and 1.1

Stateless Protocol: The first access is irrelevant to the second access.

1.0 is a stateless protocol. Every time you access a service, you need to establish a network connection, which takes time.

1.1 you can send many requests and responses based on a network connection.

For example, <link> <script> automatically sends a request to the server.

HTTP protocol composition: request and response

Composition of the request:

Request Message line-the first line in the request part

Request Message Header-from the second line to the end of the first blank line

Request body-starting from the first blank line

Components:

Response line-located in the first line

Response Header-from the second row to the first empty row

Response body-starting from the first blank line