gistfile1.cs

    /// <summary>
    /// Based on code from:
    /// http://pedroreys.com/2012/02/17/extending-asp-net-web-api-content-negotiation/
    /// </summary>
    public class NotAcceptableConnegHandler : DelegatingHandler {
        
        private readonly HttpConfiguration _configuration;

        public NotAcceptableConnegHandler(HttpConfiguration configuration) {
            if (configuration == null) {
                throw new ArgumentNullException("configuration");
            }
            _configuration = configuration;
        }

        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
            var acceptHeader = request.Headers.Accept;
            
            // from RFC:
            // If no Accept header field is present, then it is assumed that the client accepts all media types. 
            if (!acceptHeader.Any()) {
                return base.SendAsync(request, cancellationToken);
            }

            var hasFormatterForRequestedMediaType = _configuration
                .Formatters
                .Any(formatter => acceptHeader.Any(mediaType => formatter.SupportedMediaTypes.Contains(mediaType) 
	              || formatter.MediaTypeMappings.Any(m=> m.TryMatchMediaType(request) > 0)));

            if (!hasFormatterForRequestedMediaType) {
                return Task<HttpResponseMessage>.Factory.StartNew(() => new HttpResponseMessage(HttpStatusCode.NotAcceptable));
            }
            return base.SendAsync(request, cancellationToken);
        }
    }

Yeah ill put one through at some stage, really liked your article, totally agree that 406 is the correct response if nothing matches the accept header :)

…

On 26 June 2012 09:44, Pedro Reys < ***@***.*** > wrote: hey Luke, do you mind sending a pull request to the [contrib](https://github.com/WebApiContrib/WebAPIContrib)? --- Reply to this email directly or view it on GitHub: https://gist.github.com/2991443