/*
* $Id: ExtractAttachments.java,v 1.5 2006/03/01 11:41:16 blowagie Exp $
* $Name: $
*
* Copyright 2005 by Paulo Soares and Anonymous.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.tools.plugins;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import javax.swing.JInternalFrame;
import com.lowagie.text.pdf.*;
import com.lowagie.tools.arguments.FileArgument;
import com.lowagie.tools.arguments.LabelAccessory;
import com.lowagie.tools.arguments.PdfFilter;
import com.lowagie.tools.arguments.ToolArgument;
/**
* This tool lets you extract the attachements of a PDF.
*/
public class ExtractAttachments extends AbstractTool {
static {
addVersion("$Id: ExtractAttachments.java,v 1.5 2006/03/01 11:41:16 blowagie Exp $");
}
/**
* Constructs a ExtractAttachements object.
*/
public ExtractAttachments() {
FileArgument f = new FileArgument(this, "srcfile",
"The file you want to operate on", false, new PdfFilter());
f.setLabel(new LabelAccessory());
arguments.add(f);
}
/**
* @see com.lowagie.tools.plugins.AbstractTool#createFrame()
*/
protected void createFrame() {
internalFrame = new JInternalFrame("ExtractAttachments", true, false,
true);
internalFrame.setSize(300, 80);
internalFrame.setJMenuBar(getMenubar());
System.out.println("=== ExtractAttachments OPENED ===");
}
/**
* @see com.lowagie.tools.plugins.AbstractTool#execute()
*/
public void execute() {
try {
if (getValue("srcfile") == null)
throw new InstantiationException(
"You need to choose a sourcefile");
File src = (File) getValue("srcfile");
// we create a reader for a certain document
PdfReader reader = new PdfReader(src.getAbsolutePath());
final File parentFile = src.getParentFile();
final String outPath;
if (parentFile != null) {
outPath = parentFile.getAbsolutePath();
} else {
outPath = "";
}
PdfDictionary catalog = reader.getCatalog();
PdfDictionary names = (PdfDictionary) PdfReader
.getPdfObject(catalog.get(PdfName.NAMES));
if (names != null) {
PdfDictionary embFiles = (PdfDictionary) PdfReader
.getPdfObject(names.get(new PdfName("EmbeddedFiles")));
if (embFiles != null) {
HashMap embMap = PdfNameTree.readTree(embFiles);
for (Iterator i = embMap.values().iterator(); i.hasNext();) {
PdfDictionary filespec = (PdfDictionary) PdfReader
.getPdfObject((PdfObject) i.next());
unpackFile(reader, filespec, outPath);
}
}
}
for (int k = 1; k <= reader.getNumberOfPages(); ++k) {
PdfArray annots = (PdfArray) PdfReader.getPdfObject(reader
.getPageN(k).get(PdfName.ANNOTS));
if (annots == null)
continue;
for (Iterator i = annots.listIterator(); i.hasNext();) {
PdfDictionary annot = (PdfDictionary) PdfReader
.getPdfObject((PdfObject) i.next());
PdfName subType = (PdfName) PdfReader.getPdfObject(annot
.get(PdfName.SUBTYPE));
if (!PdfName.FILEATTACHMENT.equals(subType))
continue;
PdfDictionary filespec = (PdfDictionary) PdfReader
.getPdfObject(annot.get(PdfName.FS));
unpackFile(reader, filespec, outPath);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* @see com.lowagie.tools.plugins.AbstractTool#valueHasChanged(com.lowagie.tools.arguments.ToolArgument)
*/
public void valueHasChanged(ToolArgument arg) {
if (internalFrame == null) {
// if the internal frame is null, the tool was called from the
// commandline
return;
}
// represent the changes of the argument in the internal frame
}
/**
* Extract the attachements of a PDF.
*
* @param args
*/
public static void main(String[] args) {
ExtractAttachments tool = new ExtractAttachments();
if (args.length < 1) {
System.err.println(tool.getUsage());
}
tool.setArguments(args);
tool.execute();
}
/**
* @see com.lowagie.tools.plugins.AbstractTool#getDestPathPDF()
*/
protected File getDestPathPDF() throws InstantiationException {
throw new InstantiationException("There is more than one destfile.");
}
/**
* Unpacks a file attachment.
*
* @param reader
* The object that reads the PDF document
* @param filespec
* The dictonary containing the file specifications
* @param outPath
* The path where the attachment has to be written
* @throws IOException
*/
public static void unpackFile(PdfReader reader, PdfDictionary filespec,
String outPath) throws IOException {
if (filespec == null)
return;
PdfName type = (PdfName) PdfReader.getPdfObject(filespec
.get(PdfName.TYPE));
if (!PdfName.F.equals(type) && !PdfName.FILESPEC.equals(type))
return;
PdfDictionary ef = (PdfDictionary) PdfReader.getPdfObject(filespec
.get(PdfName.EF));
if (ef == null)
return;
PdfString fn = (PdfString) PdfReader.getPdfObject(filespec
.get(PdfName.F));
System.out.println("Unpacking file '" + fn + "' to " + outPath);
if (fn == null)
return;
File fLast = new File(fn.toUnicodeString());
File fullPath = new File(outPath, fLast.getName());
if (fullPath.exists())
return;
PRStream prs = (PRStream) PdfReader.getPdfObject(ef.get(PdfName.F));
if (prs == null)
return;
byte b[] = PdfReader.getStreamBytes(prs);
FileOutputStream fout = new FileOutputStream(fullPath);
fout.write(b);
fout.close();
}
}