Question

I have created a Twitter application and specified the following url as the callback url:

http://www.myapp.com/login

However, when a user comes to my site from the url myapp.com (missing the www prefix) the authentication fails.

Apparently, I cannot have multiple urls. So what can be a workaround?

Answer 1

You can either

1. Feed the correct OAuth URL by changing it based on the hostname the user uses to access your app.
2. Implement a canonical domain name, making sure visitors are redirected to the www version (or vice versa).

No, you cannot feed multiple URLs to the OAuth service.