handle exception InvalidPart (#6649)

cmd/gateway-common.go

@@ -294,6 +294,8 @@ func ErrorRespToObjectError(err error, params ...string) error {
 		err = BucketPolicyNotFound{}
 	case "InvalidBucketName":
 		err = BucketNameInvalid{Bucket: bucket}
+	case "InvalidPart":
+		err = InvalidPart{}
 	case "NoSuchBucket":
 		err = BucketNotFound{Bucket: bucket}
 	case "NoSuchKey":

cmd/gateway/s3/gateway-s3_test.go

@@ -50,6 +50,10 @@ func TestS3ToObjectError(t *testing.T) {
 			inputErr:    errResponse("InvalidBucketName"),
 			expectedErr: minio.BucketNameInvalid{},
 		},
+		{
+			inputErr:    errResponse("InvalidPart"),
+			expectedErr: minio.InvalidPart{},
+		},
 		{
 			inputErr:    errResponse("NoSuchBucketPolicy"),
 			expectedErr: minio.BucketPolicyNotFound{},