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);
        }
    }

Hey @lukemcgregor, do you mind sending a pull request to the contrib?

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