Go: Building Web Applications

Hello, Web

The following application serves as a static file at the location /static, and a dynamic response at the location /dynamic:

package main

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

const (
  Port = ":8080"
)

func serveDynamic(w http.ResponseWriter, r *http.Request) {
  response := "The time is now " + time.Now().String()
  fmt.Fprintln(w,response)
}

Just as fmt.Println will produce desired content at the console level, Fprintln allows you to direct output to any writer. We'll talk a bit more about the writers in Chapter 2, Serving and Routing, but they represent a fundamental, flexible interface that is utilized in many Go applications, not just for the Web:

func serveStatic(w http.ResponseWriter, r *http.Request) { http.ServeFile(w, r, "static.html") ...