Refactor Tunnel

src/lib/tunnel/cloudflare/healthCheck.js

@@ -0,0 +1,29 @@
+import { resolveDns } from "../shared/dnsResolver.js";
+import { HEALTH_CHECK } from "./config.js";
+
+export async function probeUrlAlive(url) {
+  if (!url) return false;
+  let hostname;
+  try { hostname = new URL(url).hostname; } catch { return false; }
+
+  if (!await resolveDns(hostname, HEALTH_CHECK.dnsTimeoutMs)) return false;
+
+  try {
+    const res = await fetch(`${url}/api/health`, {
+      signal: AbortSignal.timeout(HEALTH_CHECK.fetchTimeoutMs),
+    });
+    return res.ok;
+  } catch {
+    return false;
+  }
+}
+
+export async function waitForHealth(url, cancelToken = { cancelled: false }) {
+  const start = Date.now();
+  while (Date.now() - start < HEALTH_CHECK.timeoutMs) {
+    if (cancelToken.cancelled) throw new Error("cancelled");
+    if (await probeUrlAlive(url)) return true;
+    await new Promise((r) => setTimeout(r, HEALTH_CHECK.intervalMs));
+  }
+  throw new Error(`Health check timeout after ${HEALTH_CHECK.timeoutMs}ms`);
+}