update some...

main.go

@@ -1,7 +1,93 @@
 package main
 
-import "fmt"
+import (
+	"flag"
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/gorilla/mux"
+)
 
 func main() {
-	fmt.Println("hello from go")
+	port := flag.Uint("port", 9401, "listening port")
+	flag.Parse()
+
+	router := mux.NewRouter()
+
+	router.HandleFunc("/start", start)
+	router.HandleFunc("/stop", stop)
+	router.HandleFunc("/status", state)
+	router.HandleFunc("/ws", websocketHandler)
+
+	http.Handle("/", router)
+	http.ListenAndServe(fmt.Sprintf(":%d", *port), nil)
+}
+
+var Prg Program
+
+func start(w http.ResponseWriter, r *http.Request) {
+	if Prg.Run {
+		w.Write([]byte("Programm already running"))
+		setState("Programm already running")
+
+		return
+	}
+	Prg.start()
+	w.Write([]byte("Program started"))
+	setState("Programm started")
+
+}
+
+func stop(w http.ResponseWriter, r *http.Request) {
+	if !Prg.Run {
+		w.Write([]byte("Programm already stopped"))
+		setState("Programm already stopped")
+
+		return
+	}
+
+	Prg.stop()
+	w.Write([]byte("Program stopped"))
+	setState("Programm stopped")
+
+}
+
+func state(w http.ResponseWriter, r *http.Request) {
+	if !Prg.Run {
+		w.Write([]byte("Programm stopped"))
+		setState("Programm stopped")
+		return
+	}
+
+	w.Write([]byte(Prg.State))
+}
+
+type Program struct {
+	Run   bool
+	State string
+}
+
+func (p *Program) start() {
+	if p.Run {
+		return
+	}
+
+	go func() {
+		p.Run = true
+		counter := 0
+		for p.Run {
+			counter++
+			if counter > 100 {
+				counter = 0
+			}
+			p.State = fmt.Sprintf("Hello, Go! :%d", counter)
+			setState(fmt.Sprintf("Hello, Go! :%d", counter))
+			time.Sleep(time.Second)
+		}
+	}()
+}
+
+func (p *Program) stop() {
+	p.Run = false
 }