Question

I have a Windows 8 app that builds a string and posts to https: using WebAuthBroker. Relevant code is below.

The problem is that WebAuthBroker takes this URI and cannot connect, but when I hand=post this URI into IE, it works fine.

Running VS2012 on Windows 8.
In Package.appmanifest, have enabled Enterprise Authentication, Internet(Client), Internet(Client&Server), Private Networks(Client & Server), and Shared User Certificates.

            async Task AuthenticateAsync()
    {
        var requestUriStr = string.Format("{0}?client_id={1}&response_type=token&redirect_uri={2}", logonUriString, clientId, redirectUriString);

        requestUriStr += "&scope=stream";

        var requestUri = new Uri(requestUriStr, UriKind.RelativeOrAbsolute);
        var redirectUri = new Uri(redirectUriString, UriKind.RelativeOrAbsolute);

        var result = await WebAuthenticationBroker.AuthenticateAsync(WebAuthenticationOptions.None, requestUri, redirectUri);

        if (result.ResponseStatus != WebAuthenticationStatus.Success)
        {
            throw new Exception("Login failed: " + result.ResponseErrorDetail);
        }

Answer 1

I found my problem. From: http://social.msdn.microsoft.com/Forums/en-US/winappswithcsharp/thread/13d3742d-4b6b-444e-840e-a4db11462a08

Turns out that if you use Fiddler to debug your HTTP requests, it will
make WebAuthenticationBroker stop working. This may or may not be
related to the “Decrypt HTTPS traffic” options provided in this app,
but as soon as I closed Fiddler, WebAuthenticationBroker started
working again. I can replicate the bug at will by starting Fiddler
again, and resolve the problem by closing it.

I didn’t make advanced researches as whether or not enabling or
disabling the HTTPS options of Fiddler will impact the use of the
WebAuthenticationBroker class and methods, but on first sight it looks
like barely disabling HTTPS will make it working again. I usually
close it personally to be on the safer side.

So I had Fiddler open the whole time I was writing / debugging. I closed Fiddler, and it worked the first time!