From 20c69322009492f1abdfca1a82a9a2fd291d5553 Mon Sep 17 00:00:00 2001
From: Muyao CHEN <muyao.chen@intersec.com>
Date: Wed, 26 Jun 2024 17:41:50 +0200
Subject: [PATCH] functions and handlers

---
 cmd/hello-world/main.go | 34 +++++++++++++++++++++++++---------
 1 file changed, 25 insertions(+), 9 deletions(-)

diff --git a/cmd/hello-world/main.go b/cmd/hello-world/main.go
index 87ca56e..e6a30b2 100644
--- a/cmd/hello-world/main.go
+++ b/cmd/hello-world/main.go
@@ -5,14 +5,30 @@ import (
 	"net/http"
 )
 
-func main() {
-	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-		n, err := fmt.Fprintf(w, "Hello world")
-		if err != nil {
-			fmt.Println(err)
-		}
-		fmt.Printf("Number of bytes written: %d\n", n)
-	})
+const portNumber = ":8080"
 
-	_ = http.ListenAndServe(":8080", nil)
+// Home is the about page handler
+func Home(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "This is the home page")
+}
+
+// About is the about page handler
+func About(w http.ResponseWriter, r *http.Request) {
+	sum := addValues(2, 2)
+	fmt.Fprintf(w, "This is the about page and 2 + 2 is %d", sum)
+}
+
+// addValues adds two integers and returns the sum
+func addValues(x, y int) int {
+	return x + y
+}
+
+// main is the main application function
+func main() {
+	http.HandleFunc("/", Home)
+	http.HandleFunc("/about", About)
+
+	fmt.Printf("Starting application on port %s\n", portNumber)
+
+	_ = http.ListenAndServe(portNumber, nil)
 }