Step 4

main.go

@@ -7,15 +7,21 @@ import (
 )
 
 func main() {
-	http.HandleFunc("/hello", HelloHTTP)
-	http.HandleFunc("/", NotFound)
+	http.HandleFunc("/hello", helloHTTP)
+	http.HandleFunc("/user/", userProfile)
+	http.HandleFunc("/", notFound)
 	log.Fatal(http.ListenAndServe(":8080", nil))
 }
 
-func HelloHTTP(w http.ResponseWriter, req *http.Request) {
+func helloHTTP(w http.ResponseWriter, req *http.Request) {
 	fmt.Fprint(w, "Hello HTTP")
 }
 
-func NotFound(w http.ResponseWriter, req *http.Request) {
+func notFound(w http.ResponseWriter, req *http.Request) {
 	http.NotFound(w, req)
 }
+
+func userProfile(w http.ResponseWriter, req *http.Request) {
+	userID := req.URL.Path[len("/user/"):]
+	fmt.Fprintf(w, "User Profile: %q", userID)
+}