In what cases is it advisable to use the HTTP PUT method for sending data to the server?

The HTTP PUT method is appropriate to use when you need to replace or create a resource at a specific URI. Main use cases for PUT:

• Creating a resource with a known client-side identifier. For example, if the client knows the URL where the resource should be stored, it can send a PUT request with the data, and the server will create or replace the resource at that address.
• Full update of a resource. PUT usually implies replacing the entire resource, unlike PATCH, which is used for partial updates.

Example:

PUT /users/123 HTTP/1.1
Content-Type: application/json

{
  "name": "Ivan",
  "email": "ivan@example.com"
}

In this example, the client sends complete user data with ID 123. If the user exists, the data is replaced; if not, a new one is created.

It is important to remember that PUT is idempotent: sending the same request multiple times with the same data should not change the server state after the first request.