How to configure Webapi Selfhosted for multiple HostHeaders

Question

i what to put my asp.net mvc4 web api responding to multiple hostheader names like when we add multiple bindings do iis website.

does anyone know how can i do it? or if is it possible?

my default app (still a commandline) looks like this:

    static void Main(string[] args)
    {
        _config = new HttpSelfHostConfiguration("http://localhost:9090");

        _config.Routes.MapHttpRoute(
            "API Default", "{controller}/{id}",
            new { id = RouteParameter.Optional });

        using (HttpSelfHostServer server = new HttpSelfHostServer(_config))
        {
            server.OpenAsync().Wait();
            Console.WriteLine("Press Enter to quit.");
            Console.ReadLine();
        }

    }

Answer 1

You can can try configuring your routes to have a custom constraint to match on the host header (in the example below the route would only match if the host header equals myheader.com):

_config.Routes.MapHttpRoute(
        "API Default", "{controller}/{id}",
        new { id = RouteParameter.Optional },
        new { headerMatch = new HostHeaderConstraint("myheader.com")});

The constraint code would be something like:

public class HostHeaderConstraint : IRouteConstraint
{
    private readonly string _header;

    public HostHeaderContraint(string header)
    {
         _header = header;
    }

    public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
    {
        var hostHeader = httpContext.Request.ServerVariables["HTTP_HOST"];
        return hostHeader.Equals(_header, StringComparison.CurrentCultureIgnoreCase);
    }
}