| /* ==================================================================== |
| 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.extractor; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.poi.POIOLE2TextExtractor; |
| import org.apache.poi.POITextExtractor; |
| import org.apache.poi.hdgf.extractor.VisioTextExtractor; |
| import org.apache.poi.hpbf.extractor.PublisherTextExtractor; |
| import org.apache.poi.hslf.extractor.PowerPointExtractor; |
| import org.apache.poi.hsmf.MAPIMessage; |
| import org.apache.poi.hsmf.datatypes.AttachmentChunks; |
| import org.apache.poi.hsmf.extractor.OutlookTextExtactor; |
| import org.apache.poi.hwpf.OldWordFileFormatException; |
| import org.apache.poi.hwpf.extractor.Word6Extractor; |
| import org.apache.poi.hwpf.extractor.WordExtractor; |
| import org.apache.poi.poifs.filesystem.DirectoryEntry; |
| import org.apache.poi.poifs.filesystem.DirectoryNode; |
| import org.apache.poi.poifs.filesystem.Entry; |
| |
| /** |
| * Scratchpad-specific logic for {@link OLE2ExtractorFactory} and |
| * {@link org.apache.poi.extractor.ExtractorFactory}, which permit the other two to run with |
| * no Scratchpad jar (though without functionality!) |
| * <p>Note - should not be used standalone, always use via the other |
| * two classes</p> |
| */ |
| @SuppressWarnings("WeakerAccess") |
| public class OLE2ScratchpadExtractorFactory { |
| /** |
| * Look for certain entries in the stream, to figure it |
| * out what format is desired |
| * Note - doesn't check for core-supported formats! |
| * Note - doesn't check for OOXML-supported formats |
| */ |
| public static POITextExtractor createExtractor(DirectoryNode poifsDir) throws IOException { |
| if (poifsDir.hasEntry("WordDocument")) { |
| // Old or new style word document? |
| try { |
| return new WordExtractor(poifsDir); |
| } catch (OldWordFileFormatException e) { |
| return new Word6Extractor(poifsDir); |
| } |
| } |
| |
| if (poifsDir.hasEntry("PowerPoint Document")) { |
| return new PowerPointExtractor(poifsDir); |
| } |
| |
| if (poifsDir.hasEntry("VisioDocument")) { |
| return new VisioTextExtractor(poifsDir); |
| } |
| |
| if (poifsDir.hasEntry("Quill")) { |
| return new PublisherTextExtractor(poifsDir); |
| } |
| |
| final String[] outlookEntryNames = new String[] { |
| // message bodies, saved as plain text (PtypString) |
| // The first short (0x1000, 0x0047, 0x0037) refer to the Property ID (see [MS-OXPROPS].pdf) |
| // the second short (0x001e, 0x001f, 0x0102) refer to the type of data stored in this entry |
| // https://msdn.microsoft.com/endatatypes.Ex-us/library/cc433490(v=exchg.80).aspx |
| // @see org.apache.poi.hsmf.Types.MAPIType |
| "__substg1.0_1000001E", //PidTagBody ASCII |
| "__substg1.0_1000001F", //PidTagBody Unicode |
| "__substg1.0_0047001E", //PidTagMessageSubmissionId ASCII |
| "__substg1.0_0047001F", //PidTagMessageSubmissionId Unicode |
| "__substg1.0_0037001E", //PidTagSubject ASCII |
| "__substg1.0_0037001F", //PidTagSubject Unicode |
| }; |
| for (String entryName : outlookEntryNames) { |
| if (poifsDir.hasEntry(entryName)) { |
| return new OutlookTextExtactor(poifsDir); |
| } |
| } |
| |
| throw new IllegalArgumentException("No supported documents found in the OLE2 stream"); |
| } |
| |
| /** |
| * Returns an array of text extractors, one for each of |
| * the embedded documents in the file (if there are any). |
| * If there are no embedded documents, you'll get back an |
| * empty array. Otherwise, you'll get one open |
| * {@link POITextExtractor} for each embedded file. |
| */ |
| public static void identifyEmbeddedResources(POIOLE2TextExtractor ext, List<Entry> dirs, List<InputStream> nonPOIFS) throws IOException { |
| // Find all the embedded directories |
| DirectoryEntry root = ext.getRoot(); |
| if (root == null) { |
| throw new IllegalStateException("The extractor didn't know which POIFS it came from!"); |
| } |
| |
| if (ext instanceof WordExtractor) { |
| // These are in ObjectPool -> _... under the root |
| try { |
| DirectoryEntry op = (DirectoryEntry) |
| root.getEntry("ObjectPool"); |
| Iterator<Entry> it = op.getEntries(); |
| while(it.hasNext()) { |
| Entry entry = it.next(); |
| if(entry.getName().startsWith("_")) { |
| dirs.add(entry); |
| } |
| } |
| } catch(FileNotFoundException e) { |
| // ignored here |
| } |
| //} else if(ext instanceof PowerPointExtractor) { |
| // Tricky, not stored directly in poifs |
| // TODO |
| } else if (ext instanceof OutlookTextExtactor) { |
| // Stored in the Attachment blocks |
| MAPIMessage msg = ((OutlookTextExtactor)ext).getMAPIMessage(); |
| for (AttachmentChunks attachment : msg.getAttachmentFiles()) { |
| if (attachment.attachData != null) { |
| byte[] data = attachment.attachData.getValue(); |
| nonPOIFS.add( new ByteArrayInputStream(data) ); |
| } else if (attachment.attachmentDirectory != null) { |
| dirs.add(attachment.attachmentDirectory.getDirectory()); |
| } |
| } |
| } |
| } |
| } |