HTTP Hello World

---

• net/http

examples/http-hello-world/http_hello_world.go

package main

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

func mainPage(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello World")
}

func main() {
    http.HandleFunc("/", mainPage)
    host := "127.0.0.1"  // "0.0.0.0" to host externally as well "" defaults to it
    port := 5000
    fmt.Printf("Going to listen on http://%v:%v  Ctr-c to stop the server.\n", host, port)
    err := http.ListenAndServe(fmt.Sprintf("%v:%v", host, port), nil)
    if err != nil {
        log.Fatal(err)
    }
}