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commit 2c25be8c2918a8b0a7d269cd831fa3c083d19804 Author: quanth <[email protected]> AuthorDate: Wed Jun 30 10:57:27 2021 +0700 JAMES-3516 Create MimeMessageHeadersUtil to ease parsing MimeMessage headers --- .../store/mail/utils/MimeMessageHeadersUtil.java | 65 ++++++++++++++++++++++ 1 file changed, 65 insertions(+) diff --git a/mailbox/store/src/main/java/org/apache/james/mailbox/store/mail/utils/MimeMessageHeadersUtil.java b/mailbox/store/src/main/java/org/apache/james/mailbox/store/mail/utils/MimeMessageHeadersUtil.java new file mode 100644 index 0000000..3ba196e --- /dev/null +++ b/mailbox/store/src/main/java/org/apache/james/mailbox/store/mail/utils/MimeMessageHeadersUtil.java @@ -0,0 +1,65 @@ +/****************************************************************** + * 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. * + ******************************************************************/ + +package org.apache.james.mailbox.store.mail.utils; + +import java.util.List; +import java.util.Optional; + +import org.apache.james.mailbox.store.mail.model.MimeMessageId; +import org.apache.james.mailbox.store.mail.model.Subject; +import org.apache.james.mime4j.codec.DecodeMonitor; +import org.apache.james.mime4j.dom.field.UnstructuredField; +import org.apache.james.mime4j.field.UnstructuredFieldImpl; +import org.apache.james.mime4j.message.HeaderImpl; +import org.apache.james.mime4j.stream.Field; + +import com.github.steveash.guavate.Guavate; + +public class MimeMessageHeadersUtil { + public static Optional<MimeMessageId> parseMimeMessageId(HeaderImpl headers) { + return Optional.ofNullable(headers.getField("Message-ID")).map(field -> new MimeMessageId(field.getBody())); + } + + public static Optional<MimeMessageId> parseInReplyTo(HeaderImpl headers) { + return Optional.ofNullable(headers.getField("In-Reply-To")).map(field -> new MimeMessageId(field.getBody())); + } + + public static Optional<List<MimeMessageId>> parseReferences(HeaderImpl headers) { + List<Field> mimeMessageIdFields = headers.getFields("References"); + if (!mimeMessageIdFields.isEmpty()) { + List<MimeMessageId> mimeMessageIdList = mimeMessageIdFields.stream() + .map(mimeMessageIdField -> new MimeMessageId(mimeMessageIdField.getBody())) + .collect(Guavate.toImmutableList()); + return Optional.of(mimeMessageIdList); + } + return Optional.empty(); + } + + public static Optional<Subject> parseSubject(HeaderImpl headers) { + return Optional.ofNullable(headers.getField("Subject")) + .map(field -> { + if (!(field instanceof UnstructuredField)) { + field = UnstructuredFieldImpl.PARSER.parse(field, DecodeMonitor.SILENT); + } + return (UnstructuredField) field; + }) + .map(unstructuredField -> new Subject(unstructuredField.getValue())); + } +} --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
