How do GET and POST requests differ?

GET and POST are two main HTTP methods, differing in purpose and behavior:

• GET

  • Used to retrieve data from the server.
  • Parameters are passed in the URL (query string).
  • GET requests should be idempotent and not change the server state.
  • Usually cached by browsers and proxies.
  • URL length limitations (depend on browser and server).

• POST

  • Used to send data to the server (e.g., forms, file uploads).
  • Data is sent in the request body.
  • Can change the server state (create or update resources).
  • Not cached by default.
  • No size restrictions on the request body, except server settings.

Example:

• GET: request a page or a list of products.
• POST: submit a registration form or create a new order.

Thus, GET is for reading, POST is for creating/updating data.