##### Request message:
including:
- Request line
- Request header
- Request body
The main method of sending data is the information sent by the browser
Response message:
include:
- Status line
- Response header
- Response body
Mainly the information of the server and the content that can be directly seen in the browser (data returned by the server) and whether the request is successful
http protocol:
Obtaining the HTML page css js in the browser requests the background page to send request messages, the
server returns response messages, and
uses request messages to respond to messages in this way for data interaction, which is
called the http protocol