SignalR and client certificate - asp.net-mvc

Question

I plan to use SignalR to notify clients.
In production we are forced to use a client x509 certificate to authenticate the client using a reverse proxy. It will also terminate the SSL prior to connecting to our IIS webserver.
Will this work?
I can't find any api to add the client certificate or to use a WebRequestHandler.
I can't be the first.
/HAXEN

Answer 1

Regarding using client-based certificate: there is nothing in SingalR that allows to do it, I went through all the sources, and apparently it's an oversight, and a very annoying one. Here's a hack that I found:
public class MyHttpClient: IHttpClient
{
DefaultHttpClient _client = new DefaultHttpClient();
X509Certificate Certificate;
Action<IRequest> SpiceAction(Action<IRequest> prepareRequest)
{
return new Action<IRequest>(req =>
{
var fi = typeof(HttpWebRequestWrapper).GetField("_request",
BindingFlags.NonPublic | BindingFlags.Instance);
HttpWebRequest request = (HttpWebRequest) fi.GetValue(req);
request.ClientCertificates.Add(Certificate);
prepareRequest(req);
});
}
public Task<IResponse> Get(string url, Action<IRequest> prepareRequest)
{
return _client.Get(url, SpiceAction(prepareRequest));
}
public Task<IResponse> Post(string url, Action<IRequest> prepareRequest,
IDictionary<string, string> postData)
{
return _client.Post(url, SpiceAction(prepareRequest), postData);
}
}
and then instead of:
var conn = new Connection("https://xxxxxxxx");
conn.Start()
do:
var conn = new Connection("https://xxxxxxxx");
conn.Start(new MyHttpClient() { Certificate = xxxxxxx });

Answer 2

Here we go, with version 1.1 of SignalR Client Certificates are supported out of the box.
Great!