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Nesting subrouters in Gorilla Mux

I've been using gorilla/mux for my routing needs. But I noticed one problem, when I nest multiple Subrouters it doesn't work.

Here is the example:

func main() {
    r := mux.NewRouter().StrictSlash(true)
    api := r.Path("/api").Subrouter()
    u := api.Path("/user").Subrouter()
    u.Methods("GET").HandleFunc(UserHandler)
    http.ListenAndServe(":8080", r)
}

I wanted to use this approach so I can delegate populating the router to some other package, for example user.Populate(api)

However this doesn't seem to work. It works only if I use single Subrouter in the chain.

Any ideas?

Solution

  • I figured it out, so I'll just post it here in case someone is as stupid as I was. :D

    When creating path-based subrouter, you have to obtain it with PathPrefix instead of Path.

    r.PathPrefix("/api").Subrouter()

    Use r.Path("/api") only when attaching handlers to that endpoint.