web api from body value is null?

Question

I have checked similar questions to this here:

web-api POST body object always null

This does not exactly match what is happening in my scenario. I am making a request to my api with the following request header content-type:

Key Value
Content-Type    application/x-www-form-urlencoded

My request body then is a Response I get from another service which I cannot change

Response=SomeLongStringOfBAse64EncodedData

My Api Post Method which I can see gets hit by setting a breakpoint on it is as:

public HttpResponseMessage Authenticate([FromBody]string Response) 

However Response string is always getting null value even though I see it in the request body which I cannot understand.

Answer 1

For an action method like this

public HttpResponseMessage Authenticate([FromBody]string Response),

you need to have the request body like this, for binding to work.

=SomeLongStringOfBAse64EncodedData

If you want to bind Response=SomeLongStringOfBAse64EncodedData, you will need to change the action method like this.

public HttpResponseMessage Authenticate(SomeClass response)

and add a class

public class SomeClass
{
    public string Response { get; set; }
}