has URL that does not match with the URL of the page that’s making call to the Face Book App.Hence you need to make sure that this field must always be set to the URL of the page that makes call to the Face Book App.Here Mudassar Ahmed Khan has explain with a tutorial and example, how to get authenticate Face Book user's account and get like User Id, Profile Image, User Name, Name, Email, Gender, Address, Location and Birth Date in ASP.
Access tokens are obtained via a number of methods, each of which are covered later in this document.
➜ hoauth2 git:(master) ✗ ./example/Facebook/test "https:// client_id=317076475103268&response_type=code&redirect_uri= visit the url and paste code here: __REMOVED__ test: Status Code Exception (Status ) [("Access-Control-Allow-Origin","*"),("Cache-Control","no-store"),("Content-Type","application/json"),("Expires","Sat, GMT"),("Pragma","no-cache"),("WWW-Authenticate","OAuth \"Facebook Platform\" \"invalid_code\" \"Error validating verification code.
When someone connects with an app using Facebook Login, the app will be able to obtain an access token which provides temporary, secure access to Facebook APIs.
For this Graph Api, call is made with a access token created by my facebook application.
I generate this token by the following way, look my 3rd answer in this question - now in past couple of days one user of my module getting following error - "Error validating access token: Session has expired at unix time 1370094151.