From 913eb96ab04fdf54fc14af91f9668222af52598a Mon Sep 17 00:00:00 2001
From: mike12345567 <me@michaeldrury.co.uk>
Date: Tue, 8 Nov 2022 11:34:16 +0000
Subject: [PATCH] Fixing an issue which was alerting, x-amz-meta-fieldname
 contains an invalid value, this error isn't really documented, but comes from
 if a metadata tag is sent up with nullish, or a non-string type. Fixing this
 in the core library, removing an invalid inputs.

---
 packages/backend-core/src/objectStore/index.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packages/backend-core/src/objectStore/index.ts b/packages/backend-core/src/objectStore/index.ts
index 8453c9aee6..15b01795ab 100644
--- a/packages/backend-core/src/objectStore/index.ts
+++ b/packages/backend-core/src/objectStore/index.ts
@@ -163,6 +163,12 @@ export const upload = async ({
     ContentType: type || CONTENT_TYPE_MAP[extension.toLowerCase()],
   }
   if (metadata) {
+    // remove any nullish keys from the metadata object, as these may be considered invalid
+    for (let key of Object.keys(metadata)) {
+      if (!metadata[key] || typeof metadata[key] !== "string") {
+        delete metadata[key]
+      }
+    }
     config.Metadata = metadata
   }
   return objectStore.upload(config).promise()