Request & Response header details can be found here
The request method indicates the method to be performed on the resource identified by the Request-URI.
Ajax: Perform an asynchronous HTTP (Ajax) request.
GET
The GET method requests a representation of the specified resource. Requests using GET should only retrieve data.HEADThe HEAD method asks for a response identical to that of a GET request, but without the response body.POSTThe POST method is used to submit an entity to the specified resource, often causing a change in state or side effects on the server
PUT
The PUT method replaces all current representations of the target resource with the request payload.
DELETE
The DELETE method deletes the specified resource.
CONNECT
The CONNECT method establishes a tunnel to the server identified by the target resource.
OPTIONS
The OPTIONS method is used to describe the communication options for the target resource.
TRACE
The TRACE method performs a message loop-back test along the path to the target resource.
PATCH
The PATCH method is used to apply partial modifications to a resource.
Response Code: RFC2616
Refers: https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods
