Question

What is difference between

HTTPPOST
HTTPDELETE
HTTPPUT
HTTPGET

Normally used post and get method for submit form and i know them very well but want to know with delete and put method when and why they can be used to improve programming skills

Answer 1

What the different methods do depends entirely on how the remote web server chooses to interpret them. There is no fixed meaning. A server does not care if it sees GET or POST; rather, the code that ends up being executed to service the request does (and can decide to do anything, since it’s code).

The HTTP protocol gives an official guideline for what kind of action each verb is supposed to trigger, which is:

• GET: retrieve a resource
• PUT: replace a resource with another, or create it if it does not exist
• DELETE: remove a resource if it exists
• POST: might do anything; typically used to “add” to a resource

However this mapping is ultimately governed by application code and is typically not respected by web applications (e.g. you will see logical deletions being enacted with POST instead of DELETE).

The situation is better when talking about REST architectures over HTTP.