How to set Azure Authentication custom login return url?

I followed this article https://azure.microsoft.com/en-us/blog/announcing-app-service-authentication-authorization/ to set up Azure authentication for my MVC app. First I turned on Azure AD provider. In the Authentication / Authorization settings, I selected “Allow request(no Action)” for “Action to take when request is not authenticated” because I only need users to login for certain controller actions.

Then I added a custom FilterAttribute to check if one action needs authentication as in https://stackoverflow.com/a/26652816/1837339. In the OnAuthenticationChallenge function, I had this code to redirect to login page:

public void OnAuthenticationChallenge(AuthenticationChallengeContext filterContext)
{
    if (filterContext.Result is HttpUnauthorizedResult) {
        filterContext.Result = new RedirectResult("~/.auth/login/aad");
    }
}

All of this works, except after user finished authentication, it is redirected back to mysite/.auth/login/done page saying “You have successfully signed in” and a button to return to my site’s base url.

What I want is the redirection goes back to the user’s original url, so I think I need somehow set the return url for the login redirect. But I couldn’t find any documentation about this. Anyone could give any advice?

Answers:

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Method 1

You can use the post_login_redirect_url query string parameter to do this.

For example, if you want to automatically navigate the user to /welcome.html after logging in, you can set your login redirect to ~/.auth/login/aad?post_login_redirect_url=/welcome.html, and the user will be redirected to this page instead of the generic welcome page.

Method 2

Thank you.
This really helped.
The below worked ok for me:

     return RedirectToAction(string.Format("login/{0}?post_login_redirect_url=/Home/LoginCallBack", provider), ".auth");

provider can be one the strings: google, twitter, microsoftaccount,aad,facebook.

Also each provider must be configured on your project at the Azure Portal.

redirect url may be any uri on your project

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0