Improve failed ETag error message [#427] (#428)

* Improve failed ETag error message [#427]
protomaps · Jul 25, 2024 · a7c76e0 · a7c76e0
1 parent 0f9009e
commit a7c76e0
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/js/index.ts b/js/index.ts
@@ -407,7 +407,9 @@ export class FetchSource implements Source {
     // some storage systems are misbehaved (Cloudflare R2)
     if (resp.status === 416 || (etag && newEtag && newEtag !== etag)) {
       this.mustReload = true;
-      throw new EtagMismatch(etag);
+      throw new EtagMismatch(
+        `Server returned non-matching ETag ${etag} after one retry. Check browser extensions and servers for issues that may affect correct ETag headers.`
+      );
     }
 
     if (resp.status >= 300) {