Duplicate MIME Fields Are Not Coalesced *************************************** .. Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. MIME headers can contain more than one MIME field with the same name. Earlier versions of Traffic Server joined multiple fields with the same name into one field with composite values. This behavior came at a performance cost and caused interoperability problems with older clients and servers. Therefore, this version of Traffic Server does not coalesce duplicate fields. Properly-behaving plugins should check for the presence of duplicate fields and then iterate over the duplicate fields via :ref:``TSMimeHdrFieldNextDup ``.