georgiosd georgiosd - 3 months ago 26x
AngularJS Question

Prevent ASP.NET from redirecting to login.aspx

We have a website that runs fully on AngularJS with an ASP.NET Web API back-end with the following configuration:
- HTML5 routing is enabled on Angular and there is a rewrite rule in web.config to direct all traffic to index.html
- MVC is not installed (only razor pages)
- Authentication happens using Forms Authentication and related cookies

I have just added the Helicon IIS plugin to have .htaccess password protected for our development server (it's a mess to do it with IIS alone) but I have a basic problem.

After I input the basic auth credentials, I will get a redirect to

and although I'm not sure who is responsible for this (IIS or Helicon plugin), it will match one of my AngularJS routes and result in an error.

How can I stop this redirect from happening?

My web.config authentication bit:

<authentication mode="Forms">
<forms protection="All" timeout="15" name=".ASPXAUTH" path="/" requireSSL="false" slidingExpiration="false" cookieless="UseCookies" enableCrossAppRedirects="false" />


If you are using ASP.NET 4.5. you can disable forms authentication redirect HttpResponse.SuppressFormsAuthenticationRedirect property.

In Global.asax:

protected void Application_EndRequest(Object sender, EventArgs e)
        HttpApplication context = (HttpApplication)sender;
        context.Response.SuppressFormsAuthenticationRedirect = true;