func GetSong(ctx *middleware.Context, w http.ResponseWriter, r *http.Request) (interface{}, error) {
var s song.Song
s.ID = bson.ObjectIdHex(ctx.Params.ByName("id"))
err := s.Get()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return s, err
}
return s, nil
}
