Go Hello World style app that does some actual processing.

Go-hello-world-does-some-work.go

package main
 
import (
	"bytes"
	"fmt"
	"log"
	"net/http"
)
 
func main() {
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		var buffer bytes.Buffer
		for i := 0; i < 1000; i++ {
			buffer.WriteString("a")
		}
		fmt.Fprintf(w, buffer.String()+"Hello!")
	})
 
	log.Println("Listening on 8080...")
	log.Fatal(http.ListenAndServe(":8080", nil))
}