问题
I have implemented Sign in with Twitter on my web site using DotNetOpenAuth lib using asp.net mvc 3.
My problem is that every time the user click Sign-in with twitter it redirects him to a twitter page (even if he is already logged in to twitter).
I saw that sites like www.pinterest.com avoids this somehow.
How can I avoid the redirect to Twitter sign-in page if the user is already logged in to twitter?
回答1:
This is called Sign in with Twitter. Redirect users to https://api.twitter.com/oauth/authenticate?oauth_token=xyz instead of https://api.twitter.com/oauth/authorize?oauth_token=xyz. If the user is has an active session with twitter.com and has previously authorized the application they will silently be redirected to the callback url.
来源：https://stackoverflow.com/questions/10379853/twitter-sign-in-page-always-showing