add Basic-Auth example

examples/basic-auth-server/.gitignore

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+dist

examples/basic-auth-server/Makefile

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+.PHONY: dev
+dev:
+	wrangler dev
+
+.PHONY: build
+build:
+	mkdir -p dist
+	tinygo build -o ./dist/app.wasm -target wasm ./...
+
+.PHONY: publish
+publish:
+	wrangler publish

examples/basic-auth-server/README.md

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+# basic-auth-server
+
+* This is an example of an HTTP server with Basic-Auth .
+
+## Demo
+
+* https://basic-auth-server.syumai.workers.dev/
+
+userName: `user`
+password: `password`

examples/basic-auth-server/go.mod

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+module github.com/syumai/basic-auth-server
+
+go 1.18
+
+require github.com/syumai/workers v0.0.0
+
+replace github.com/syumai/workers => ../../

examples/basic-auth-server/go.sum

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+github.com/syumai/workers v0.1.0 h1:z5QfQR2X+PCKzom7RodpI5J4D5YF7NT7Qwzb9AM9dgY=
+github.com/syumai/workers v0.1.0/go.mod h1:alXIDhTyeTwSzh0ZgQ3cb9HQPyyYfIejupE4Z3efr14=

examples/basic-auth-server/main.go

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+package main
+
+import (
+	"net/http"
+
+	"github.com/syumai/workers"
+)
+
+const (
+	userName     = "user"
+	userPassword = "password"
+)
+
+func authenticate(req *http.Request) bool {
+	username, password, ok := req.BasicAuth()
+	return ok && username == userName && password == userPassword
+}
+
+func handleRequest(w http.ResponseWriter, req *http.Request) {
+	if !authenticate(req) {
+		w.Header().Add("WWW-Authenticate", `Basic realm="login is required"`)
+		w.WriteHeader(http.StatusUnauthorized)
+		w.Write([]byte("Unauthorized\n"))
+		return
+	}
+	w.Write([]byte("Authorized!\n"))
+}
+
+func main() {
+	workers.Serve(http.HandlerFunc(handleRequest))
+}

examples/basic-auth-server/worker.mjs

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+import "../assets/polyfill_performance.js";
+import "../assets/wasm_exec.js";
+import mod from "./dist/app.wasm";
+
+const go = new Go();
+
+const load = WebAssembly.instantiate(mod, go.importObject).then((instance) => {
+  go.run(instance);
+  return instance;
+});
+
+export default {
+  async fetch(req) {
+    await load;
+    return handleRequest(req);
+  },
+};

examples/basic-auth-server/wrangler.toml

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+name = "basic-auth-server"
+main = "./worker.mjs"
+compatibility_date = "2022-05-13"
+compatibility_flags = [
+    "streams_enable_constructors"
+]
+
+[build]
+command = "make build"