From 240e9a3702e8123873b97b49aa7fc94e8416ac63 Mon Sep 17 00:00:00 2001
From: bcoll <bcoll@cloudflare.com>
Date: Fri, 2 Feb 2024 16:43:04 +0000
Subject: [PATCH] fix: fallback to returning stack trace if `format-errors`
 broken

---
 .../definitions/json.module.template          | 25 ++++++++++++-------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/packages/playground-preview-worker/src/middleware/definitions/json.module.template b/packages/playground-preview-worker/src/middleware/definitions/json.module.template
index d16abbc12a7b..860385be6d6b 100644
--- a/packages/playground-preview-worker/src/middleware/definitions/json.module.template
+++ b/packages/playground-preview-worker/src/middleware/definitions/json.module.template
@@ -13,15 +13,22 @@ const jsonError = async (request, env, _ctx, middlewareCtx) => {
   } catch (e) {
     console.error(e);
     const error = reduceError(e);
-    return fetch('https://format-errors.devprod.cloudflare.dev', {
-      method: 'POST',
-      body: JSON.stringify({
-        error,
-        url: request.url,
-        method: request.method,
-        headers: Object.fromEntries(request.headers.entries())
-      })
-    });
+    try {
+      const errorRes = await fetch(
+        'https://format-errors.devprod.cloudflare.dev',
+        {
+          method: 'POST',
+          body: JSON.stringify({
+            error,
+            url: request.url,
+            method: request.method,
+            headers: Object.fromEntries(request.headers.entries()),
+          }),
+        }
+      );
+      if (errorRes.ok) return errorRes;
+    } catch {}
+    return new Response(error.stack ?? error.message);
   }
 };