Go + Angular ui-router - angularjs

Question

I'm a new Gopher trying to do a Go backend to serve my Angularjs frontend and also serve an API.
This is what I have so far.
package main
import (
"github.com/gorilla/mux"
"log"
"net/http"
)
func main() {
rtr := mux.NewRouter()
srtr := rtr.PathPrefix("/api").Subrouter()
srtr.HandleFunc("/hello", hello).Methods("GET")
rtr.PathPrefix("/").Handler(http.FileServer(http.Dir("./static/")))
http.Handle("/", rtr)
log.Println("Listening...")
http.ListenAndServe(":3000", nil)
}
func hello(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("Hello World"))
}
Everything works fine. /api/hello return "Hello World" and if I go to / it will serve my index.html. However since I'm trying to use angular ui-router so I need my go server to send all non-registered routes to angular so angular ui-router can handle them.
For example: If I go /random right now it will return a 404 since I don't have any file under ./static named random. But what I want is Go to forward that request to Angular so ui-router can handle the /random

Answer 1

In Your router You should serve index.html to all undefined elsewhere URLs. In mux package there is helpful handler:
http://www.gorillatoolkit.org/pkg/mux#Router
- look at NotFoundHandler
You can use it, to handle all 404's and serve index.html instead:
func main() {
r := mux.NewRouter()
r.HandleFunc("/foo", fooHandler)
r.NotFoundHandler = http.HandlerFunc(notFound)
http.Handle("/", r)
}
and define notFound function:
func notFound(w http.ResponseWriter, r *http.Request) {
http.ServeFile(w, r, "static/index.html")
}