Twitter OAuth via a popup

Question

I was wondering how to do twitter OAuth via a popup, i.e. load up the Oauth page in a popup and make the callback close the child window and reload the parent window.

Edit: OK iframes are bad, but how would you accomplish the above, I notice posterous.com does this - I'm looking to achieve the same flow as FB connect.

Answer 1

Doing the same thing for Yahoo today...

1. Open a popup
2. Send user to twitter for authentication
3. Twitter sends user back to mysite.com/authcompleted.php, with authentication parameters in the query string. Still in the popup here.

4. The popup (mysite.com/authcompleted.html) reads the query string and sends the data to the opener window via javascript

   window.opener.setTwitterAuthData(yourData)

5. Inside setTwitterAuthData, which is in your main window, set appropriate form fields and submit the data to your server.