GO net/http tips

handle_not_found_404.go

package main

import (
    "fmt"
    "net/http"
)

func helloWorld(w http.ResponseWriter, r *http.Request) {
    // this is what you want
    if r.URL.Path != "/" {
        // I wonder if there's more about this...
        http.NotFound(w, r) // Respond with a 404 Not Found
        return
    }
    fmt.Fprintln(w, "Hello, World!")
}

func main() {
    http.HandleFunc("/", helloWorld)
    http.ListenAndServe(":8080", nil)
}