web.api Delegating handler gives 404 when executing innerhandler

Question

I am creating an web.api (v1 in c#) for an iOS app. The app is sending gps-date to the app in 1 burst. So we wanted to gzip the data in the app and then process that data.

I created a DelegatingHandler

public class GZipToJsonHandler : DelegatingHandler
{
    public GZipToJsonHandler(HttpMessageHandler innerHandler)
    {
        InnerHandler = innerHandler;
    }
    protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
            /* removed unzip code */
            /* removed log call */
            return base.SendAsync(request, cancellationToken);
    }
}

and added a custom route

var handler = new HttpControllerDispatcher(config);
config.Routes.MapHttpRoute(
  "WithGZip",
  "client/GPSDataWithGZip",
  null,
  null, new GZipToJsonHandler(handler)
);

When the app calls the route, I can see in the log-files that the handler gets called. But when it hits base.async it returns "No HTTP resource found that matches the requested URI"

I've added a lot of logging, but I cannot seem to find why it cannot find the resource it has already hit

in the client controller I have this action

public HttpResponseMessage GPSDataWithGZip([FromBody] GpsRequest model)
{
    return SaveGPSData(model);
}

Answer 1

It looks like the InnerHandler couldn't match the current url to a route. after adding default to the route it worked.

defaults: new {controller='client', action='GPSDataWithGZip'}