fixing issue with pings

components/utils/jsping.js

@@ -1,38 +0,0 @@
-function request_image(url) {
-    return new Promise(function(resolve, reject) {
-        var img = new Image();
-        var settled = false;
-        function settleOk() {
-            if (settled) return;
-            settled = true;
-            clearTimeout(failTimer);
-            img.onload = img.onerror = null;
-            resolve(img);
-        }
-        function settleFail() {
-            if (settled) return;
-            settled = true;
-            clearTimeout(failTimer);
-            img.onload = img.onerror = null;
-            reject(url);
-        }
-        img.onload = settleOk;
-        img.onerror = settleFail;
-        img.src = url + '?random-no-cache=' + Math.floor((1 + Math.random()) * 0x10000).toString(16);
-        var failTimer = setTimeout(settleFail, 5000);
-    });
-}
-
-function ping(url, multiplier) {
-    return new Promise(function(resolve, reject) {
-        var start = (new Date()).getTime();
-        var response = function() {
-            var delta = ((new Date()).getTime() - start);
-            delta *= (multiplier || 1);
-            resolve(delta);
-        };
-        request_image(url).then(response).catch(response);
-    });
-}
-
-export default ping;

components/utils/jsping.ts

@@ -0,0 +1,30 @@
+async function ping(url: string, multiplier = 1, signal?: AbortSignal): Promise<number> {
+    const address = url.trim();
+    const target = new URL(/^[a-z][a-z\d+.-]*:\/\//i.test(address) ? address : `http://${address}`);
+    if (target.protocol !== 'http:' && target.protocol !== 'https:') {
+        throw new Error('Server addresses must use HTTP or HTTPS.');
+    }
+
+    const controller = new AbortController();
+    const abort = () => controller.abort();
+    if (signal?.aborted) abort();
+    signal?.addEventListener('abort', abort, { once: true });
+    const timeout = setTimeout(abort, 5000);
+    const start = performance.now();
+
+    try {
+        await fetch(target.href, {
+            method: 'HEAD',
+            mode: 'no-cors',
+            cache: 'no-store',
+            credentials: 'omit',
+            signal: controller.signal,
+        });
+        return (performance.now() - start) * multiplier;
+    } finally {
+        clearTimeout(timeout);
+        signal?.removeEventListener('abort', abort);
+    }
+}
+
+export default ping;