| /**************************************************************** |
| * 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.jdkim.mailets; |
| |
| import java.io.IOException; |
| |
| import javax.mail.MessagingException; |
| import javax.mail.internet.MimeMessage; |
| import javax.mail.internet.MimeMultipart; |
| import javax.mail.internet.MimePart; |
| |
| import org.apache.mailet.Mail; |
| import org.apache.mailet.base.GenericMailet; |
| |
| /** |
| * Make sure the message stream is 7bit. Every 8bit part is encoded to |
| * quoted-printable or base64 and the message is saved. |
| */ |
| public class ConvertTo7Bit extends GenericMailet { |
| |
| public void service(Mail mail) throws MessagingException { |
| MimeMessage message = mail.getMessage(); |
| try { |
| convertTo7Bit(message); |
| message.saveChanges(); |
| } catch (IOException e) { |
| throw new MessagingException( |
| "IOException converting message to 7bit: " + e.getMessage(), |
| e); |
| } |
| } |
| |
| /** |
| * Converts a message to 7 bit. |
| * |
| * @param part |
| */ |
| private void convertTo7Bit(MimePart part) throws MessagingException, |
| IOException { |
| if (part.isMimeType("multipart/*")) { |
| MimeMultipart parts = (MimeMultipart) part.getContent(); |
| int count = parts.getCount(); |
| for (int i = 0; i < count; i++) { |
| convertTo7Bit((MimePart) parts.getBodyPart(i)); |
| } |
| } else if ("8bit".equals(part.getEncoding())) { |
| // The content may already be in encoded the form (likely with mail |
| // created from a stream). In that case, just changing the encoding |
| // to quoted-printable will mangle the result when this is |
| // transmitted. |
| // We must first convert the content into its native format, set it |
| // back, and only THEN set the transfer encoding to force the |
| // content to be encoded appropriately. |
| |
| // if the part doesn't contain text it will be base64 encoded. |
| String contentTransferEncoding = part.isMimeType("text/*") ? "quoted-printable" |
| : "base64"; |
| part.setContent(part.getContent(), part.getContentType()); |
| part |
| .setHeader("Content-Transfer-Encoding", |
| contentTransferEncoding); |
| part.addHeader("X-MIME-Autoconverted", "from 8bit to " |
| + contentTransferEncoding + " by " |
| + getMailetContext().getServerInfo()); |
| } |
| } |
| |
| } |