What is the "openid" url of facebook?

I made my openid in my site like this:

    livejournal: {
        name: 'LiveJournal',
        label: 'Enter your Livejournal username.',
        url: 'http://{username}.livejournal.com/'
    },
    wordpress: {
        name: 'Wordpress',
        label: 'Enter your Wordpress.com username.',
        url: 'http://{username}.wordpress.com/'
    },
    blogger: {
        开发者_开发知识库name: 'Blogger',
        label: 'Your Blogger account',
        url: 'http://{username}.blogspot.com/'
    },

And I want to add facebook as my openid provider, so, what is the url of facebook openid?

This site allows login using facebook, if you want to try.

Unfortunately, Facebook does not provide OpenID authentication. They have a competing standard called Connect. Here are a few links you might find useful:

http://developers.facebook.com/connect.php
http://www.facebook.com/advertising/?connect
https://developers.facebook.com/docs/authentication/connect_auth/
http://nyquistrate.com/django/facebook-connect/
http://code.google.com/p/django-facebookconnect/

Edit:

I see you linked to Gigya, which allows Facebook login. If you click that link, you will notice that it says "Connect with Facebook" -- keyword "connect". Gigya uses Facebook's Connect standard alongside the free OpenID standard. They are not mutually exclusive, so feel free to mix them in order to give your users the best login experience.

Again, as you were told here, Facebook is not an OpenID provider. They have limited support for associating an account with an OpenID from another provider, but that's it.