fix wrong check for url

main.js

@@ -1,11 +1,10 @@
-const { app, BrowserWindow, nativeTheme, Menu, MenuItem, globalShortcut } = require('electron/main');
+const { app, BrowserWindow, nativeTheme, Menu, MenuItem } = require('electron/main');
 const path = require('node:path');
 const fs = require('fs');
 const os = require('os');
 const log = require('electron-log/main');
 const { linkExists } = require('link-exists');
 const { setInterval } = require('node:timers/promises');
-const { type } = require('node:os');
 
 const isMac = process.platform === 'darwin';
 
@@ -67,7 +66,7 @@ function loadConfig() {
 /**
  * Creates the browser window
  */
-async function createWindow() {
+function createWindow() {
     win = new BrowserWindow({
         width: 1920,
         height: 1080,
@@ -104,7 +103,7 @@ async function createWindow() {
 
     // Load page from config file
     if (config != undefined && 'url' in config) {
-        testAndLoadUrl(config.url);
+        loadUrlAsync(config.url);
     } else {
         try {
             // Load file from data folder if available
@@ -169,27 +168,34 @@ function validateDomain(event) {
  * Access is tried in a 1 second interval and the url is loaded if successfull.
  * @param {string} testurl 
  */
-function testAndLoadUrl(testurl) {
+async function loadUrlAsync(testurl) {
     try {
         let url = new URL(testurl);
         // If it’s an online url, test whether it’s reachable
-        let delay = 1;
-        if (['https:', 'http:', 'https', 'http'].includes(url.protocol)) {
-            (async function () {
-                for await (const startTime of setInterval(delay)) {
-                    let reachable = linkExists(url.hostname);
+        if (['https:', 'http:', 'https', 'http'].includes(url.protocol) &&
+            !['127.0.0.1', 'localhost'].includes(url.host)) {
+            reachable = await linkExists(url.href);
+            if (reachable) {
+                log.info("Successfull access to " + url.hostname);
+                log.info("Loading " + config.url);
+                win.loadURL(config.url);
+            } else {
+                log.warn("Could not reach " + url.hostname);
+
+                for await (_ of setInterval(1000)) {
+                    reachable = await linkExists(url.href);
                     if (reachable) {
-                        log.info("Successfull access to " + url.hostname)
-                        log.info("Loading " + config.url)
+                        log.info("Successfull access to " + url.hostname);
+                        log.info("Loading " + config.url);
                         win.loadURL(config.url);
                         // break the interval
                         break;
                     } else {
                         log.warn("Could not reach " + url.hostname);
-                        delay = 1000;
                     }
                 }
-            })();
+            }
+
         }
         // Load other protocols (i. e. offline) immedately
         else {
@@ -234,3 +240,8 @@ app.on('window-all-closed', () => {
 app.on('quit', () => {
     log.info('Quit');
 });
+
+// prevent error dialogs in case of exceptions
+process.on('uncaughtException', function (error) {
+    log.error(error);
+});