Serving a single page application with go net/http mux

I'm building an api that also serves my react front end app, but am having an issue serving my index.html

Given that it's not really a go template I'm not using html/template.

I'm not seeing a strait forward way to serve the static html root of my app on all pages that do not start /api in the route.

I'm purposely trying not to use any go frameworks beyond gorilla's mux

My handler.go:

func Index(w http.ResponseWriter, r *http.Request) {
	http.FileServer(http.Dir("./views"))
}

Routes.go:

type Route struct {
	Name        string
	Method      string
	Pattern     string
	HandlerFunc http.HandlerFunc
}

type Routes []Route

var routes = Routes{
	Route{
		"Index",
		"GET",
		"/",
		Index,
	},
}

router.go

import (
	"net/http"

	"github.com/gorilla/mux"
)

func NewRouter() *mux.Router {

	router := mux.NewRouter().StrictSlash(true)
	for _, route := range routes {
		var handler http.Handler

		handler = route.HandlerFunc
		handler = Logger(handler, route.Name)

		router.
			Methods(route.Method).
			Path(route.Pattern).
			Name(route.Name).
			Handler(handler)

	}

	return router
}

main:

package main

import (
	"./server"
	"log"
	"net/http"
)

func main() {

	router := server.NewRouter()

	log.Fatal(http.ListenAndServe(":8080", router))
}

Currently a blank page shows up, and thats it. My index.html is located in /views/index.html in relation to the executable (but I've tried it in relation to the handler as well)

Update

I was able to serve the html file using the method shown in this question: https://stackoverflow.com/questions/26559557/how-do-you-serve-a-static-html-file-using-a-go-web-server However using mux and the more modularized file structure still yields a nice pretty, clean blank page.

In handler.go, your Index function is actually a no-op, since http.FileServer() returns a Handler, which is never passed the ResponseWriter or Request, hence the blank page.

Maybe try something like this to at least get past that:

func Index(w http.ResponseWriter, r *http.Request) {
    http.FileServer(http.Dir("./views")).ServeHTTP(w, r)
}