feat(pingcheck): pings a sever and port to see if its up

backend/src/utils/checkHost.utils.ts

@@ -0,0 +1,83 @@
+import dns from "node:dns";
+import net from "node:net";
+
+type IP = {
+	success: boolean;
+	message: string;
+};
+export const checkHostnamePort = async (host: string): Promise<boolean> => {
+	const [hostname, port] = host.split(":");
+
+	// a just incase to make sure we have the host name and port
+	if (!hostname || !port) {
+		return false;
+	}
+
+	// Resolve the hostname to an IP address
+	const ip = (await checkHostUp(hostname)) as IP;
+
+	if (!ip.success) {
+		return false;
+	}
+	const portNum = parseInt(port, 10);
+
+	const hostUp = (await pingHost(hostname, portNum)) as IP;
+
+	if (!hostUp.success) {
+		return false;
+	}
+
+	return true;
+};
+
+const pingHost = (host: string, port: number) => {
+	return new Promise((res) => {
+		const s = new net.Socket();
+
+		s.setTimeout(2000);
+
+		s.connect(port, host);
+
+		s.on("connect", () => {
+			s.destroy();
+			res({
+				success: true,
+				message: "Server up",
+			});
+		});
+
+		s.on("timeout", () => {
+			s.destroy();
+			res({
+				success: true,
+				message: "Server Offline or unreachable, please check connection",
+			});
+		});
+
+		s.on("error", (e) => {
+			s.destroy();
+			return res({
+				success: false,
+				message: "Encountered error while checking if host:port up",
+				error: e,
+			});
+		});
+	});
+};
+const checkHostUp = (host: string) => {
+	return new Promise((res) => {
+		dns.lookup(host, (err, address) => {
+			if (err) {
+				return res({
+					success: false,
+					message: "Error connecting to the server",
+					error: err,
+				});
+			} else {
+				res({ success: true, message: "Server Ip", data: address });
+			}
+		});
+	});
+};
+
+//checkHostnamePort("usmcd1vms036:1433");