Requires SSL for WebAPI

SslRequiredMessageHandler

public class SslRequiredMessageHandler : DelegatingHandler
{
    protected override Task<HttpResponseMessage> SendAsync(
        HttpRequestMessage request, 
        CancellationToken cancellationToken)
    {
        if (!request.IsSecureConnection))
        {
            var response = 
                request.CreateErrorResponse(HttpStatusCode.Forbidden, "Https required");

            return Task.FromResult(response);
        }

        return base.SendAsync(request, cancellationToken);
    }
}