/*
* 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.tika.parser.microsoft;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.apache.poi.poifs.filesystem.DirectoryEntry;
import org.apache.poi.poifs.filesystem.DirectoryNode;
import org.apache.poi.poifs.filesystem.DocumentEntry;
import org.apache.poi.poifs.filesystem.DocumentInputStream;
import org.apache.poi.poifs.filesystem.Entry;
import org.apache.poi.poifs.filesystem.Ole10Native;
import org.apache.poi.poifs.filesystem.Ole10NativeException;
import org.apache.tika.config.TikaConfig;
import org.apache.tika.detect.Detector;
import org.apache.tika.exception.TikaException;
import org.apache.tika.extractor.EmbeddedDocumentExtractor;
import org.apache.tika.extractor.ParsingEmbeddedDocumentExtractor;
import org.apache.tika.io.TikaInputStream;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.mime.MediaType;
import org.apache.tika.mime.MimeType;
import org.apache.tika.mime.MimeTypeException;
import org.apache.tika.mime.MimeTypes;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.microsoft.OfficeParser.POIFSDocumentType;
import org.apache.tika.parser.pkg.ZipContainerDetector;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.SAXException;
abstract class AbstractPOIFSExtractor {
private final EmbeddedDocumentExtractor extractor;
private TikaConfig tikaConfig;
private MimeTypes mimeTypes;
private Detector detector;
protected AbstractPOIFSExtractor(ParseContext context) {
EmbeddedDocumentExtractor ex = context.get(EmbeddedDocumentExtractor.class);
if (ex==null) {
this.extractor = new ParsingEmbeddedDocumentExtractor(context);
} else {
this.extractor = ex;
}
tikaConfig = context.get(TikaConfig.class);
mimeTypes = context.get(MimeTypes.class);
detector = context.get(Detector.class);
}
// Note - these cache, but avoid creating the default TikaConfig if not needed
protected TikaConfig getTikaConfig() {
if (tikaConfig == null) {
tikaConfig = TikaConfig.getDefaultConfig();
}
return tikaConfig;
}
protected Detector getDetector() {
if (detector != null) return detector;
detector = getTikaConfig().getDetector();
return detector;
}
protected MimeTypes getMimeTypes() {
if (mimeTypes != null) return mimeTypes;
mimeTypes = getTikaConfig().getMimeRepository();
return mimeTypes;
}
protected void handleEmbeddedResource(TikaInputStream resource, String filename,
String relationshipID, String mediaType, XHTMLContentHandler xhtml,
boolean outputHtml)
throws IOException, SAXException, TikaException {
try {
Metadata metadata = new Metadata();
if(filename != null) {
metadata.set(Metadata.TIKA_MIME_FILE, filename);
metadata.set(Metadata.RESOURCE_NAME_KEY, filename);
}
if (relationshipID != null) {
metadata.set(Metadata.EMBEDDED_RELATIONSHIP_ID, relationshipID);
}
if(mediaType != null) {
metadata.set(Metadata.CONTENT_TYPE, mediaType);
}
if (extractor.shouldParseEmbedded(metadata)) {
extractor.parseEmbedded(resource, xhtml, metadata, outputHtml);
}
} finally {
resource.close();
}
}
/**
* Handle an office document that's embedded at the POIFS level
*/
protected void handleEmbeddedOfficeDoc(
DirectoryEntry dir, XHTMLContentHandler xhtml)
throws IOException, SAXException, TikaException {
// Is it an embedded OLE2 document, or an embedded OOXML document?
if (dir.hasEntry("Package")) {
// It's OOXML (has a ZipFile):
Entry ooxml = dir.getEntry("Package");
TikaInputStream stream = TikaInputStream.get(
new DocumentInputStream((DocumentEntry) ooxml));
try {
ZipContainerDetector detector = new ZipContainerDetector();
MediaType type = detector.detect(stream, new Metadata());
handleEmbeddedResource(stream, null, dir.getName(), type.toString(), xhtml, true);
return;
} finally {
stream.close();
}
}
// It's regular OLE2:
// What kind of document is it?
Metadata metadata = new Metadata();
metadata.set(Metadata.EMBEDDED_RELATIONSHIP_ID, dir.getName());
POIFSDocumentType type = POIFSDocumentType.detectType(dir);
TikaInputStream embedded = null;
try {
if (type == POIFSDocumentType.OLE10_NATIVE) {
try {
// Try to un-wrap the OLE10Native record:
Ole10Native ole = Ole10Native.createFromEmbeddedOleObject((DirectoryNode)dir);
metadata.set(Metadata.RESOURCE_NAME_KEY, dir.getName() + '/' + ole.getLabel());
byte[] data = ole.getDataBuffer();
embedded = TikaInputStream.get(data);
} catch (Ole10NativeException ex) {
// Not a valid OLE10Native record, skip it
}
} else if (type == POIFSDocumentType.COMP_OBJ) {
try {
// Grab the contents and process
DocumentEntry contentsEntry;
try {
contentsEntry = (DocumentEntry)dir.getEntry("CONTENTS");
} catch (FileNotFoundException ioe) {
contentsEntry = (DocumentEntry)dir.getEntry("Contents");
}
DocumentInputStream inp = new DocumentInputStream(contentsEntry);
byte[] contents = new byte[contentsEntry.getSize()];
inp.readFully(contents);
embedded = TikaInputStream.get(contents);
// Try to work out what it is
MediaType mediaType = getDetector().detect(embedded, new Metadata());
String extension = type.getExtension();
try {
MimeType mimeType = getMimeTypes().forName(mediaType.toString());
extension = mimeType.getExtension();
} catch(MimeTypeException mte) {
// No details on this type are known
}
// Record what we can do about it
metadata.set(Metadata.CONTENT_TYPE, mediaType.getType().toString());
metadata.set(Metadata.RESOURCE_NAME_KEY, dir.getName() + extension);
} catch(Exception e) {
throw new TikaException("Invalid embedded resource", e);
}
} else {
metadata.set(Metadata.CONTENT_TYPE, type.getType().toString());
metadata.set(Metadata.RESOURCE_NAME_KEY, dir.getName() + '.' + type.getExtension());
}
// Should we parse it?
if (extractor.shouldParseEmbedded(metadata)) {
if (embedded == null) {
// Make a TikaInputStream that just
// passes the root directory of the
// embedded document, and is otherwise
// empty (byte[0]):
embedded = TikaInputStream.get(new byte[0]);
embedded.setOpenContainer(dir);
}
extractor.parseEmbedded(embedded, xhtml, metadata, true);
}
} finally {
if (embedded != null) {
embedded.close();
}
}
}
}