The requested resource does not support HTTP method 'GET'

Question

My route is correctly configured, and my methods have the decorated tag. I still get "The requested resource does not support HTTP method 'GET'" message?

[System.Web.Mvc.AcceptVerbs("GET", "POST")]
[System.Web.Mvc.HttpGet]
public string Auth(string username, string password)
{
  // Décoder les paramètres reçue.
  string decodedUsername = username.DecodeFromBase64();
  string decodedPassword = password.DecodeFromBase64();

  return "value";
}

Here are my routes:

config.Routes.MapHttpRoute(
    name: "AuthentificateRoute",
    routeTemplate: "api/game/authentificate;{username};{password}",
    defaults: new { controller = "Game",
                    action = "Auth", 
                    username = RouteParameter.Optional, 
                    password = RouteParameter.Optional },
    constraints: new { httpMethod = new HttpMethodConstraint(HttpMethod.Get) }
);

config.Routes.MapHttpRoute(
    name: "DefaultApi",
    routeTemplate: "api/{controller}/{id}",
    defaults: new { controller = "Home", id = RouteParameter.Optional }
);

amiry jd · Accepted Answer · 2014-07-26 19:54:01Z

237

Please use the attributes from the System.Web.Http namespace on your WebAPI actions:

    [System.Web.Http.AcceptVerbs("GET", "POST")]
    [System.Web.Http.HttpGet]
    public string Auth(string username, string password)
    {...}

The reason why it doesn't work is because you were using the attributes that are from the MVC namespace System.Web.Mvc. The classes in the System.Web.Http namespace are for WebAPI.

edited Jul 26, 2014 at 19:54

amiry jd

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answered Oct 7, 2012 at 5:45

Maggie Ying

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7 Comments

Rushino Over a year ago

Damn.. thanks ! i was about to get crazy lol incredible how you can waste time on such small things..

Jaxidian Over a year ago

Indeed, an explanation of why this is the correct answer is certainly necessary here!

Maggie Ying Over a year ago

Edited answer with explanation.

Girish Gupta Over a year ago

can I specify [System.Web.Http.AcceptVerbs("GET", "POST")] and [System.Web.Http.HttpGet] in RouteConfig.cs so that I no need add this in each API.

Dan Beaulieu Over a year ago

Why did I need to do this in only one of my 10 apis for this project? I created the api in exactly the same way as in the other 9 apis. How frustrating.

|

Armando Servin · Accepted Answer · 2018-11-30 01:26:22Z

8

In my case, the route signature was different from the method parameter. I had id, but I was accepting documentId as parameter, that caused the problem.

[Route("Documents/{id}")]   <--- caused the webapi error
[Route("Documents/{documentId}")] <-- solved
public Document Get(string documentId)
{
  ..
}

answered Nov 30, 2018 at 1:26

Armando Servin

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Comments

Marquis103 · Accepted Answer · 2020-09-03 15:06:55Z

5

Resolved this issue by using http(s) when accessing the endpoint. The route I was accessing was not available over http. So I would say verify the protocols for which the route is available.

answered Sep 3, 2020 at 15:06

Marquis103

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Comments

Kashif Faraz · Accepted Answer · 2018-07-30 09:52:29Z

3

just use this attribute

[System.Web.Http.HttpGet]

not need this line of code:

[System.Web.Http.AcceptVerbs("GET", "POST")]

answered Jul 30, 2018 at 9:52

Kashif Faraz

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Comments

Cameron · Accepted Answer · 2019-01-08 22:52:37Z

I was experiencing the same issue.. I already had 4 controllers going and working just fine but when I added this one it returned "The requested resource does not support HTTP method 'GET'". I tried everything here and in a couple other relevant articles but was indifferent to the solution since, as Dan B. mentioned in response to the answer, I already had others working fine.

I walked away for a while, came back, and immediately realized that when I added the Controller it was nested under the "Controller" class and not "ApiController" class that my other Controllers were under. I'm assuming I chose the wrong scaffolding option to build the .cs file in Visual Studio. So I included the System.Web.Http namespace, changed the parent class, and everything works without the additional attributes or routing.

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