CAS provides a http package compatible client implementation for use with securing http frontends in golang.
import "gopkg.in/cas.v1"
Documentation is available at: http://godoc.org/gopkg.in/cas.v1
Examples are included in the documentation but are also available in the
_examples directory.
在gopkg.in/cas.v1这个包中增加beego_helpers.go，用于辅助beego进行cas交互