From 6af78cf041c00d05752d69e3b1241198fb50ba54 Mon Sep 17 00:00:00 2001
From: nikk gitanes <tsynik@gmail.com>
Date: Mon, 9 Aug 2021 01:34:58 +0300
Subject: [PATCH] add web port check on start

---
 server/server.go | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/server/server.go b/server/server.go
index 3bcb179..9a4b20d 100644
--- a/server/server.go
+++ b/server/server.go
@@ -2,6 +2,7 @@ package server
 
 import (
 	"io/ioutil"
+	"net"
 	"os"
 	"path/filepath"
 
@@ -15,8 +16,18 @@ func Start(port string, roSets bool) {
 	if port == "" {
 		port = "8090"
 	}
-	go cleanCache()
-	web.Start(port)
+	log.TLogln("Check web port", port)
+	l, err := net.Listen("tcp", ":"+port)
+	if l != nil {
+		l.Close()
+	}
+	if err != nil {
+		log.TLogln("Port", port, "already in use! Abort")
+		os.Exit(1)
+	} else {
+	  go cleanCache()
+	  web.Start(port)
+	}
 }
 
 func cleanCache() {