A Simple OpenID Login Example on Appengine
October 18th, 2010
I wrote a simple openid login example.
I used user api to do the real login.
Here is source code.
The idea is very simple. Instead of redirecting main page, I use javascript to popup a small page. Most providers have webpage optimized for popup. Then this page will detect callback and refresh main page and close itself. A hidden iframe will also try previous login url if available.