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Apache POI - Java API To Access Microsoft Format Files
/* ====================================================================
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.poi.hsmf.extractor;
import static org.apache.poi.util.StringUtil.startsWithIgnoreCase;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.Locale;
import org.apache.poi.extractor.POIOLE2TextExtractor;
import org.apache.poi.hsmf.MAPIMessage;
import org.apache.poi.hsmf.datatypes.AttachmentChunks;
import org.apache.poi.hsmf.datatypes.StringChunk;
import org.apache.poi.hsmf.exceptions.ChunkNotFoundException;
import org.apache.poi.poifs.filesystem.DirectoryNode;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.util.LocaleUtil;
/**
* A text extractor for HSMF (Outlook) .msg files.
* Outputs in a format somewhat like a plain text email.
*
* @since 4.1.2
*/
public class OutlookTextExtractor implements POIOLE2TextExtractor {
private final MAPIMessage msg;
private boolean doCloseFilesystem = true;
public OutlookTextExtractor(MAPIMessage msg) {
this.msg = msg;
}
public OutlookTextExtractor(DirectoryNode poifsDir) throws IOException {
this(new MAPIMessage(poifsDir));
}
public OutlookTextExtractor(POIFSFileSystem fs) throws IOException {
this(new MAPIMessage(fs));
}
public OutlookTextExtractor(InputStream inp) throws IOException {
this(new MAPIMessage(inp));
}
public static void main(String[] args) throws Exception {
if(args.length == 0) {
System.err.println("Usage: OutlookTextExtractor [ ...]");
System.exit(1);
}
for (String filename : args) {
try (POIFSFileSystem poifs = new POIFSFileSystem(new File(filename));
OutlookTextExtractor extractor = new OutlookTextExtractor(poifs)) {
System.out.println(extractor.getText());
}
}
}
/**
* Returns the underlying MAPI message
*/
public MAPIMessage getMAPIMessage() {
return msg;
}
/**
* Outputs something a little like a RFC822 email
*/
public String getText() {
StringBuilder s = new StringBuilder();
// See if we can get a suitable encoding for any
// non unicode text in the file
msg.guess7BitEncoding();
// Off we go
Iterator emails;
try {
emails = Arrays.asList(msg.getRecipientEmailAddressList()).iterator();
} catch (ChunkNotFoundException e) {
emails = Collections.emptyIterator();
}
try {
s.append("From: " + msg.getDisplayFrom() + "\n");
} catch (ChunkNotFoundException e) {
}
// For To, CC and BCC, try to match the names
// up with their email addresses. Relies on the
// Recipient Chunks being in the same order as
// people in To + CC + BCC.
try {
handleEmails(s, "To", msg.getDisplayTo(), emails);
} catch (ChunkNotFoundException e) {
}
try {
handleEmails(s, "CC", msg.getDisplayCC(), emails);
} catch (ChunkNotFoundException e) {
}
try {
handleEmails(s, "BCC", msg.getDisplayBCC(), emails);
} catch (ChunkNotFoundException e) {
}
// Date - try two ways to find it
try {
// First try via the proper chunk
SimpleDateFormat f = new SimpleDateFormat("E, d MMM yyyy HH:mm:ss Z", Locale.ROOT);
f.setTimeZone(LocaleUtil.getUserTimeZone());
s.append("Date: ").append(f.format(msg.getMessageDate().getTime())).append("\n");
} catch (ChunkNotFoundException e) {
try {
// Failing that try via the raw headers
String[] headers = msg.getHeaders();
for (String header : headers) {
if (startsWithIgnoreCase(header, "date:")) {
s.append("Date:").append(header, header.indexOf(':') + 1, header.length()).append("\n");
break;
}
}
} catch (ChunkNotFoundException he) {
// We can't find the date, sorry...
}
}
try {
s.append("Subject: ").append(msg.getSubject()).append("\n");
} catch (ChunkNotFoundException e) {
}
// Display attachment names
// To get the attachments, use ExtractorFactory
for (AttachmentChunks att : msg.getAttachmentFiles()) {
StringChunk name = att.getAttachLongFileName();
if (name == null) name = att.getAttachFileName();
String attName = name == null ? null : name.getValue();
if (att.getAttachMimeTag() != null &&
att.getAttachMimeTag().getValue() != null) {
attName = att.getAttachMimeTag().getValue() + " = " + attName;
}
s.append("Attachment: ").append(attName).append("\n");
}
try {
s.append("\n").append(msg.getTextBody()).append("\n");
} catch (ChunkNotFoundException e) {
}
return s.toString();
}
/**
* Takes a Display focused string, eg "Nick; Jim" and an iterator
* of emails, and does its best to return something like
* "Nick ; Jim "
*/
protected void handleEmails(StringBuilder s, String type, String displayText, Iterator emails) {
if (displayText == null || displayText.length() == 0) {
return;
}
String[] names = displayText.split(";\\s*");
boolean first = true;
s.append(type).append(": ");
for (String name : names) {
if (first) {
first = false;
} else {
s.append("; ");
}
s.append(name);
if (emails.hasNext()) {
String email = emails.next();
// Append the email address in <>, assuming
// the name wasn't already the email address
if (!email.equals(name)) {
s.append(" <").append(email).append(">");
}
}
}
s.append("\n");
}
@Override
public MAPIMessage getDocument() {
return msg;
}
@Override
public void setCloseFilesystem(boolean doCloseFilesystem) {
this.doCloseFilesystem = doCloseFilesystem;
}
@Override
public boolean isCloseFilesystem() {
return doCloseFilesystem;
}
@Override
public MAPIMessage getFilesystem() {
return msg;
}
}