package context (gorilla)

[cydside]

Hi,
I'm figuring out how authentication works and its relation to "github.com/gorilla/context" package. This package, according to his webpage,

does not play well > with the shallow copying of the request that http.Request.WithContext (added to net/http Go 1.7 onwards) performs. You should either use just gorilla/context, or moving forward, the new http.Request.Context().

So, here I'm asking for moving forward both to use a native package and have a nice working example.
Thank you in advance,

Danilo