Add rudimentary backend and frontend services

back/back.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+)
+
+func main() {
+	http.HandleFunc("/ok", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, "ok")
+	})
+
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}

front/front.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		if isbackendok() {
+			fmt.Fprintln(w, "Backend is OK.")
+		} else {
+			fmt.Fprintln(w, "Backend is NOT OK.")
+		}
+	})
+
+	log.Fatal(http.ListenAndServe(":8000", nil))
+}
+
+func isbackendok() bool {
+	r, err := http.Get("http://localhost:8080/ok")
+	if err == nil && r.StatusCode == 200 {
+		data, err := ioutil.ReadAll(r.Body)
+		r.Body.Close()
+		if err == nil && string(data) == "ok" {
+			return true
+		}
+		return false
+	}
+	return false
+}