In which cases Idempotent PUT would be useful in REST?
Ok. I have read at several places that using the same PUT URL several times should have the same effect. PUTting data to Api/Student/1234 should either create or update the same student with id 1234.
Now every Url will have a payload of the actual student data that needs to be added or updated in the database. Why not the ID be part of the payload? I can simply PUT data to Api/Student with the payload containing the ID.
You would say that the Url is not idempotent. My question is how will I benefit by making a PUT url idempotent? I understand that GET must be idempotent. But why would PUT need to be idempotent because the client is the one putting the data. Calling the same URL Api/Student with payload containing the same student Id will have the same effect each time. So the purpose is solved right?
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