fix: add timeout to registry URL connection check

.changeset/add-timeout-to-registry-url-check.md

@@ -0,0 +1,5 @@
+---
+"@asyncapi/cli": patch
+---
+
+fix: add timeout and AbortController to registry URL validation to prevent CLI hang on unreachable endpoints

cli/src/utils/generate/registry.ts

@@ -0,0 +1,28 @@
+const REGISTRY_TIMEOUT_MS = 5000; // 5 seconds timeout for registry validation
+
+export async function registryValidation(registryUrl: string): Promise<void> {
+  const controller = new AbortController();
+  const timeoutId = setTimeout(() => controller.abort(), REGISTRY_TIMEOUT_MS);
+
+  try {
+    await fetch(registryUrl, {
+      method: 'HEAD', // Use HEAD for a lightweight reachability check
+      signal: controller.signal,
+    });
+  } catch (error: any) { // Use 'any' for error type to handle both AbortError and other network errors
+    if (error.name === 'AbortError') {
+      throw new Error(
+        `Connection to registry URL '${registryUrl}' timed out after ${REGISTRY_TIMEOUT_MS / 1000} seconds. ` +
+        `Please ensure the URL is correct and the host is reachable.`
+      );
+    }
+    // Handle other network-related errors (e.g., DNS resolution failure, connection refused)
+    throw new Error(
+      `Failed to connect to registry URL '${registryUrl}'. ` +
+      `Network error: ${error.message}. ` +
+      `Please check your network connection and the provided registry URL.`
+    );
+  } finally {
+    clearTimeout(timeoutId);
+  }
+}