Web API - 405 - The requested resource does not support http method 'PUT'

Question

I have a Web API project and I am unable to enable \"PUT/Patch\" requests against it.

The response I get from fiddler is:

HTTP/1.1 405 Method Not Al         


        

Answer 1

Are you using attribute routing?

This mystic error was a route attributes issue. This is enabled in your WebAPIConfig as:

 config.MapHttpAttributeRoutes(); 

It turns out Web Api Controllers "cannot host a mixture of verb-based action methods and traditional action name routing. "; https://aspnetwebstack.codeplex.com/workitem/184

in a nutshell: I needed to mark all of my actions in my API Controller with the [Route] attribute, otherwise the action is "hidden" (405'd) when trying to locate it through traditional routing.

API Controller:

[RoutePrefix("api/quotes")]
public class QuotesController : ApiController
{
    ...

    // POST api/Quote
    [ResponseType(typeof(Quote))]
    [Route]
    public IHttpActionResult PostQuote(Quote quote)
    {
        if (!ModelState.IsValid)
        {
            return BadRequest(ModelState);
        }

        db.Quotes.Add(quote);
        db.SaveChanges();

        return CreatedAtRoute("", new { id = quote.QuoteId }, quote);
    }

note: my Route is unnamed so the CreatedAtRoute() name is just an empty string.

WebApiConfig.cs:

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        // Web API configuration and services
        config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));

        // Web API routes
        config.MapHttpAttributeRoutes();

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

    }
}

hope this helps