Difference between POST, PUT and DELETE method in controller

Hrides Thakur

7y11.7k.NET

Hello

When to user POST, PUT and DELETE method in controller.

POST is used to send data to a server to create/update a resource then why there is PUT and DELETE.

PUT is used to update the resource. we can do same with POST method the why PUT.

another doubt:

The DELETE method deletes the specified resource.

we can write the delete in POST method then why delete.

Pease clear in both in MVC and also in Web API.

Thanks in advance.

2 Replies

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Mehreen Tahir7y ago
Yes POST and PUT are much similar in the sense that they both send data to the server. Technically, you could use either fot Create and Update scenario but here's the difference.

PUT is idempotent meaning that if you make same request twice with the same parameters and everything using PUT then the second request will have no effect. That's why it is used for UPDATE scenario becuase UPDATE more than once with the same parameters wouldn't do anything more than what first call did.
But with different parameters it will completely replace the resources on the server with the resources sent in request. (So yes can be used to create as well)

But POST is not idempotent. So if you make same call with same parameters using POST, each request will have separate effect. Ideally even if we're submitting two identical items to a CREATE method, it should create two entries in the data storage. That's the reason we use POST for CREAT scenarios.

Now comes the DELETE. it is also idempotent so you can execute it again and again and it will have the same effect or will tell you that resource does not exists. DELETE requests that a resouce be removed from data storage but it doesn't have to be removed immediately. In case you call DELETE but the requested resource needs approval to be deleted, then it will wait for the permission and then remove.

Also they add readability to the design and make the debugging easy. Let me know if you still have any confusion.
Sreekanth Reddy7y ago
Hi Hrides,
Yes, I understood your query...
We can provide any attribute and perform any action. There will not be any kind of technical or functionality wise differeces.

Apart from that, They are like protocols, where the readability for the developers will be more clear.

For more follow the below URL :
https://stackoverflow.com/questions/147187/why-do-we-need-anything-more-than-http-get-put-post

If it helps, Mark as answer.
Thank you.