It was difficult to use rootHandler in the test, so stopped making it a global variable

Author: daido1976

main.go

@@ -19,9 +19,6 @@ var port = getEnv("PORT", "8080")
 var rieEndpoint = getEnv("RIE_ENDPOINT", "http://localhost:9000/2015-03-31/functions/function/invocations")
 var enableCors = getEnv("ENABLE_CORS", "false")
 
-// It is a global variable for testing.
-var rootHandler http.Handler
-
 func getEnv(key, fallback string) string {
 	if value, exists := os.LookupEnv(key); exists {
 		return value
@@ -30,12 +27,15 @@ func getEnv(key, fallback string) string {
 }
 
 func main() {
+	var rootHandler http.Handler
+
 	if enableCors == "true" {
 		rootHandler = cors.AllowAll().Handler(http.HandlerFunc(lambdaUrlProxyHandler))
 		log.Println("[Lambda URL Proxy] CORS enabled")
 	} else {
 		rootHandler = http.HandlerFunc(lambdaUrlProxyHandler)
 	}
+
 	http.Handle("/", rootHandler)
 	log.Printf("[Lambda URL Proxy] Listening on http://localhost:%s\n", port)
 	log.Fatal(http.ListenAndServe(fmt.Sprintf(":%s", port), nil))