How do I change the Facebook Redirect URL in an MVC5 webapp? - facebook

Question

I've deployed my MVC5 application onto a server (was on localhost up until now), and now the Facebook authentication isn't working, because the redirect URL is still set to localhost. The link generated starts with:
https://www.facebook.com/dialog/oauth?response_type=code&client_id=xxxxxxxxxxxxxxxx&redirect_uri=https%3A%2F%2Flocalhost%2Fsignin-facebook
How does it generate the redirect_uri? I need to specify my new server's address and thought it would be by changing the IISUrl property in the project's csproj file, but when I do, the project fails to load.
I've whitelisted the new URL at the Facebook side, I just can't work out how to tell my application itself that it has relocated (I'm guessing it's generating the value for the redirect_url parameter based on a value/setting somewhere in my application).
I'm using the Microsoft Owin packages, and the code to generate the button is:
#foreach (AuthenticationDescription p in loginProviders)
{
<button type="submit" class="btn btn-default btn-block btn-social btn-#p.AuthenticationType.ToLower()" id="#p.AuthenticationType" name="provider" value="#p.AuthenticationType" title="Log in using your #p.Caption account">
#p.AuthenticationType
<i class="fa fa-#p.AuthenticationType.ToLower()"></i>
</button>
}
Thanks

Answer 1

This is the way owin builds the redirect uri
string baseUri =
Request.Scheme +
Uri.SchemeDelimiter +
Request.Host +
Request.PathBase;
string redirectUri =
baseUri +
Options.CallbackPath;
where Options.Callbackpath defaults to /signin-facebook
Since your base uri is reading localhost make sure the server you deployed to isn't running on localhost and you are browsing to it with the correct domain name