What is the difference between POST and GET in parameter transmission?

The main difference between POST and GET in parameter transmission:

• GET transmits parameters via the URL as a query string (e.g., ?id=123&name=abc). This limits the length of parameters (usually up to a few thousand characters) and makes the parameters visible in the browser's address bar.

• POST transmits parameters in the body of the HTTP request, allowing the sending of larger data volumes, including files, and hides the parameters from the URL.

GET is typically used for retrieving data without side effects, while POST is used for sending data to the server, such as when creating or updating resources.

Example:

GET request:

GET /api/users?id=123

POST request with body:

POST /api/users
Content-Type: application/json

{"id":123,"name":"John"}