✨ process attributes as lower case

Issue: CLDSRV-813

Author: DarkIsDude

lib/api/bucketGet.js

@@ -323,7 +323,11 @@ function bucketGet(authInfo, request, log, callback) {
     const v2 = params['list-type'];
 
     const optionalAttributes =
-        request.headers['x-amz-optional-object-attributes']?.split(',').map(attr => attr.trim()) ?? [];
+        request.headers['x-amz-optional-object-attributes']
+            ?.split(',')
+            .map(attr => attr.trim())
+            .map(attr => attr !== 'RestoreStatus' ? attr.toLowerCase() : attr)
+        ?? [];
     if (optionalAttributes.some(attr => !attr.startsWith('x-amz-meta-') && attr != 'RestoreStatus')) {
         return callback(
             errorInstances.InvalidArgument.customizeDescription('Invalid attribute name specified')

tests/unit/api/bucketGet.js

@@ -533,5 +533,36 @@ describe('bucketGet API V2', () => {
                 done();
             });
         });
+
+        it('should return user metadata as case insentive (lowercase header)', done => {
+            const objectNameMeta = 'objectWithMeta';
+            const putRequest = new DummyRequest({
+                bucketName,
+                headers: { 'x-amz-meta-color': 'yellow' },
+                url: `/${bucketName}/${objectNameMeta}`,
+                namespace,
+                objectKey: objectNameMeta,
+            }, postBody);
+
+            const testGetRequest = Object.assign({
+                query: {},
+                url: baseUrl,
+            }, baseGetRequest);
+            testGetRequest.headers['x-amz-optional-object-attributes'] = 'x-amz-meta-coLor';
+
+            async.waterfall([
+                next => bucketPut(authInfo, testPutBucketRequest, log, next),
+                (_, next) => objectPut(authInfo, putRequest, undefined, log, next),
+                (_, next) => bucketGet(authInfo, testGetRequest, log, next),
+                (result, _, next) => parseString(result, next),
+            ],
+            (err, result) => {
+                assert.strictEqual(err, null);
+                const content = result.ListBucketResult.Contents[0];
+                assert.strictEqual(content.Key[0], objectNameMeta);
+                assert.strictEqual(content['x-amz-meta-color'][0], 'yellow');
+                done();
+            });
+        });
     });
 });