This is an example of how we might nest multiple mux.Routers. This is especially useful if we want to later wrap our nested router with Negroni.

main.go

package hello

import (
	"fmt"
	"net/http"

	"github.com/gorilla/mux"
)

func init() {
	// Create the "root" router, if you will...
	r := mux.NewRouter().StrictSlash(true)

	// Create your "Subrouter" dedicated to /api which will use the PathPrefix
	apiRouter := mux.NewRouter().PathPrefix("/api").Subrouter().StrictSlash(true)

	// This step is where we connect our "root" router and our "Subrouter" together.
	r.PathPrefix("/api").Handler(apiRouter)

	// Define "root" routes using r
	r.HandleFunc(genHandleFunc("/", "root of site"))
	r.HandleFunc(genHandleFunc("/home", "home"))

	// Define "Subrouter" routes using apiRouter
	apiRouter.HandleFunc(genHandleFunc("/", "root of API, /api"))
	apiRouter.HandleFunc(genHandleFunc("/v1/", "root of API V1, /api/v1"))
	apiRouter.HandleFunc(genHandleFunc("/v1/resourceabc", "API V1 - resourceabc, /api/v1/resourceabc"))

	/* Finally we pass our "root" router to the net/http library. The "root" router will contain all
	of the routes for /api also.
	*/
	http.Handle("/", r)
}

// Silly function to quickly generate a HandleFunc
func genHandleFunc(p string, msg string) (path string, f func(http.ResponseWriter, *http.Request)) {
	path = p
	f = func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "%v\n", msg)
	}
	return
}