extract listenAndServe method

main.go

@@ -117,6 +117,43 @@ func downloadBook(novelURL string, ch chan bool) {
 	ch <- false
 }
 
+func listenAndServe() {
+	dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
+	if err != nil {
+		log.Fatal(err)
+	}
+	ifaces, err := net.Interfaces()
+	if err != nil {
+		log.Fatal(err)
+	}
+	var ips []string
+	for _, i := range ifaces {
+		addrs, err := i.Addrs()
+		if err != nil {
+			fmt.Println(err)
+			continue
+		}
+		for _, addr := range addrs {
+			switch v := addr.(type) {
+			case *net.IPNet:
+				if v.IP.IsLoopback() || v.IP.IsLinkLocalMulticast() || v.IP.IsLinkLocalUnicast() {
+					break
+				}
+				ips = append(ips, "\t"+v.IP.String())
+			case *net.IPAddr:
+				if v.IP.IsLoopback() || v.IP.IsLinkLocalMulticast() || v.IP.IsLinkLocalUnicast() {
+					break
+				}
+				ips = append(ips, "\t"+v.IP.String())
+			}
+		}
+	}
+	fmt.Println("Local IP:")
+	fmt.Println(strings.Join(ips, "\n"))
+	fmt.Println("starting http server on", config.Opts.ListenAndServe)
+	log.Fatal(http.ListenAndServe(config.Opts.ListenAndServe, http.FileServer(http.Dir(dir))))
+}
+
 func main() {
 	luaVersion := lua.GetLuaRelease()
 	luajitVersion := lua.GetLuaJITVersion()
@@ -144,41 +181,7 @@ func main() {
 	}
 
 	if config.Opts.ListenAndServe != "" {
-		dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
-		if err != nil {
-			log.Fatal(err)
-		}
-		ifaces, err := net.Interfaces()
-		if err != nil {
-			log.Fatal(err)
-		}
-		var ips []string
-		for _, i := range ifaces {
-
-			addrs, err := i.Addrs()
-			if err != nil {
-				fmt.Println(err)
-				continue
-			}
-			for _, addr := range addrs {
-				switch v := addr.(type) {
-				case *net.IPNet:
-					if v.IP.IsLoopback() || v.IP.IsLinkLocalMulticast() || v.IP.IsLinkLocalUnicast() {
-						break
-					}
-					ips = append(ips, "\t"+v.IP.String())
-				case *net.IPAddr:
-					if v.IP.IsLoopback() || v.IP.IsLinkLocalMulticast() || v.IP.IsLinkLocalUnicast() {
-						break
-					}
-					ips = append(ips, "\t"+v.IP.String())
-				}
-			}
-		}
-		fmt.Println("Local IP:")
-		fmt.Println(strings.Join(ips, "\n"))
-		fmt.Println("starting http server on", config.Opts.ListenAndServe)
-		log.Fatal(http.ListenAndServe(config.Opts.ListenAndServe, http.FileServer(http.Dir(dir))))
+		listenAndServe()
 		return
 	}