When to use PUT or POST in RESTful Web Service

One of the most common confusion among web developers is the choice of PUT or POST HTTP method for creating or updating a resource while developing RESTful Web Services. Since both can be used to submit data, you can use either POST or PUT to create or update a resource. Many web developers want to use PUT for creating a resource on the server because it's idempotent. No matter, how many times you call the PUT, the state of the resource will not jeopardize. Since the possibility of re-submission is real on a slow network, using PUT to create resource makes it easy, as you don't need to worry about user clicking the submit button multiple times. But, the key point to remember is that when you use PUT to create a resource, you need to provide the id e.g.

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