Foursquare defaulting to 5-digit code flow

[donpdonp]

I setup foursquare as specified in the readme. When I approved foursquare access, foursquare gave a 5 digit code instead of redirecting back to the webapp. Turns out the foursquare behavior has changed an the oauth_callback must be specified when the request token is acquired.

instead of (from README)

oauth = Foursquare::OAuth.new(oauth_key, oauth_secret)
request_token = oauth.request_token.token
request_secret = oauth.request_token.secret

do:

oauth = Foursquare::OAuth.new(oauth_key, oauth_secret)
oauth.request_token(:oauth_callback => "callback url")
request_token = oauth.request_token.token
request_secret = oauth.request_token.secret

This will get foursquare to redirect back to the webapp. request_token() does an HTTP request to foursquare, and subsequent calls appear to cache the result.