107 lines
3.7 KiB
Java
107 lines
3.7 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hmef;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.ArrayList;
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import java.util.List;
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import org.apache.poi.util.LittleEndian;
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/**
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* HMEF - Implementation of the Microsoft TNEF message
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* encoding format (aka winmail.dat)
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* See:
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* http://support.microsoft.com/kb/241538
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* http://en.wikipedia.org/wiki/Transport_Neutral_Encapsulation_Format
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* http://search.cpan.org/dist/Convert-TNEF/
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*/
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public final class HMEFMessage {
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public static final long HEADER_SIGNATURE = 0x223e9f78;
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private int fileId;
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private List<Attribute> messageAttributes = new ArrayList<Attribute>();
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private List<MAPIAttribute> mapiAttributes = new ArrayList<MAPIAttribute>();
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private List<Attachment> attachments = new ArrayList<Attachment>();
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public HMEFMessage(InputStream inp) throws IOException {
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// Check the signature matches
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long sig = LittleEndian.readInt(inp);
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if(sig != HEADER_SIGNATURE) {
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throw new IllegalArgumentException(
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"TNEF signature not detected in file, " +
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"expected " + HEADER_SIGNATURE + " but got " + sig
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);
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}
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// Read the File ID
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fileId = LittleEndian.readUShort(inp);
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// Now begin processing the contents
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process(inp, 0);
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// Finally expand out the MAPI Attributes
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for(Attribute attr : messageAttributes) {
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if(attr.getId() == Attribute.ID_MAPIPROPERTIES) {
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mapiAttributes.addAll(
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MAPIAttribute.create(attr)
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);
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}
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}
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for(Attachment attachment : attachments) {
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for(Attribute attr : attachment.getAttributes()) {
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if(attr.getId() == Attribute.ID_MAPIPROPERTIES) {
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attachment.getMAPIAttributes().addAll(
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MAPIAttribute.create(attr)
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);
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}
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}
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}
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}
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private void process(InputStream inp, int lastLevel) throws IOException {
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// Fetch the level
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int level = inp.read();
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if(level == Attribute.LEVEL_END_OF_FILE) {
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return;
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}
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// Build the attribute
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Attribute attr = new Attribute(inp);
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// Decide what to attach it to, based on the levels and IDs
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if(level == Attribute.LEVEL_MESSAGE) {
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messageAttributes.add(attr);
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} else if(level == Attribute.LEVEL_ATTACHMENT) {
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// Previous attachment or a new one?
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if(attachments.size() == 0 || attr.getId() == Attribute.ID_ATTACHRENDERDATA) {
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attachments.add(new Attachment());
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}
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// Save the attribute for it
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attachments.get(attachments.size()-1).addAttribute(attr);
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} else {
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throw new IllegalStateException("Unhandled level " + level);
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}
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// Handle the next one down
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process(inp, level);
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}
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}
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