WASM - Hello World - webServer.go

webServer.go

// webServer.go

package main

import (
	"log"
	"net/http"
	"strings"
)

const dir = "./out"

// create a handler struct
type HttpHandler struct{}

// implement `ServeHTTP` method on `HttpHandler` struct
func (h HttpHandler) ServeHTTP(res http.ResponseWriter, req *http.Request) {

	fs := http.FileServer(http.Dir(dir))

	log.Print("Serving " + dir + " on http://localhost:8080")

	res.Header().Add("Cache-Control", "no-cache")

	if strings.HasSuffix(req.URL.Path, ".wasm") {
		res.Header().Set("content-type", "application/wasm")
	}

	fs.ServeHTTP(res, req)
}

func main() {
	// create a new handler
	handler := HttpHandler{}

	// listen and serve
	http.ListenAndServe(":8080", handler)
}