package main import "net/http" func main() { // Create a new request multiplexer // Take incoming requests and dispatch them to the matching handlers mux := http.NewServeMux() // Register the routes and handlers mux.HandleFunc("GET /", test) // Run the server http.ListenAndServe(":4002", mux) } func test(w http.ResponseWriter, r *http.Request) { println("test123") w.Write([]byte("test")) }