[
https://issues.apache.org/jira/browse/PDFBOX-4666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16948783#comment-16948783
]
Tilman Hausherr commented on PDFBOX-4666:
-----------------------------------------
You could try to register a copy of the modified code in a derived textstripper
class with {{addOperator(new DrawObject()}}
{code}
/*
* 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.pdfbox.contentstream.operator;
import java.io.IOException;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.graphics.PDXObject;
import org.apache.pdfbox.pdmodel.graphics.form.PDFormXObject;
import org.apache.pdfbox.pdmodel.graphics.form.PDTransparencyGroup;
import org.apache.pdfbox.pdmodel.PDResources;
/**
* Do: Draws an XObject.
*
* @author Ben Litchfield
* @author Mario Ivankovits
*/
public class DrawObject extends OperatorProcessor
{
private static final Log LOG = LogFactory.getLog(DrawObject.class);
@Override
public void process(Operator operator, List<COSBase> arguments) throws
IOException
{
if (arguments.isEmpty())
{
throw new MissingOperandException(operator, arguments);
}
COSBase base0 = arguments.get(0);
if (!(base0 instanceof COSName))
{
return;
}
COSName name = (COSName) base0;
if (context.getResources().isImageXObject(name))
{
// we're done here, don't decode images when doing text extraction
return;
}
PDXObject xobject = context.getResources().getXObject(name);
if (xobject instanceof PDFormXObject)
{
PDFormXObject form = (PDFormXObject) xobject;
PDResources formResources = form.getResources();
if (formResources != null &&
context.getResources().getCOSObject() ==
formResources.getCOSObject())
{
LOG.error("avoiding recursion with XObject '" + name.getName()
+ "'");
return;
}
if (form instanceof PDTransparencyGroup)
{
context.showTransparencyGroup((PDTransparencyGroup) form);
}
else
{
context.showForm(form);
}
}
}
@Override
public String getName()
{
return OperatorName.DRAW_OBJECT;
}
}
{code}
> StackOverflowError with PDFTextStripper.getText()
> -------------------------------------------------
>
> Key: PDFBOX-4666
> URL: https://issues.apache.org/jira/browse/PDFBOX-4666
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.17
> Reporter: Josh Wein
> Assignee: Tilman Hausherr
> Priority: Major
> Labels: recursive
> Fix For: 2.0.18, 3.0.0 PDFBox
>
> Attachments: example.pdf
>
>
> Reproducible with the attached file
>
> {code:java}
> File pdf = new File("example.pdf");
> PDDocument doc = PDDocument.load(pdf);
> new PDFTextStripper().getText(doc);
> {code}
>
> {code:java}
> java.lang.StackOverflowErrorjava.lang.StackOverflowError at
> java.util.zip.Inflater.<init>(Inflater.java:102) at
> org.apache.pdfbox.filter.FlateFilter.decompress(FlateFilter.java:74) at
> org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:50) at
> org.apache.pdfbox.filter.Filter.decode(Filter.java:87) at
> org.apache.pdfbox.cos.COSInputStream.create(COSInputStream.java:84) at
> org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:175) at
> org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:163) at
> org.apache.pdfbox.pdmodel.graphics.form.PDFormXObject.getContents(PDFormXObject.java:144)
> at
> org.apache.pdfbox.pdfparser.PDFStreamParser.<init>(PDFStreamParser.java:92)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:496)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:480)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:184)
> at
> org.apache.pdfbox.contentstream.operator.DrawObject.process(DrawObject.java:65)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:872)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:480)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:184)
> at
> org.apache.pdfbox.contentstream.operator.DrawObject.process(DrawObject.java:65)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:872)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:480)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:184)
> at
> org.apache.pdfbox.contentstream.operator.DrawObject.process(DrawObject.java:65)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:872)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:480)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:184)
> at
> org.apache.pdfbox.contentstream.operator.DrawObject.process(DrawObject.java:65)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:872)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:480)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:184)
> at
> org.apache.pdfbox.contentstream.operator.DrawObject.process(DrawObject.java:65)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:872)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:480)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:184)
> at
> org.apache.pdfbox.contentstream.operator.DrawObject.process(DrawObject.java:65)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:872)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:480)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showForm(PDFStreamEngine.java:184)
> ...
> at
> org.apache.pdfbox.contentstream.operator.DrawObject.process(DrawObject.java:65)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:872)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:480)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:153)
> at
> org.apache.pdfbox.text.LegacyPDFStreamEngine.processPage(LegacyPDFStreamEngine.java:139)
> at
> org.apache.pdfbox.text.PDFTextStripper.processPage(PDFTextStripper.java:391)
> at
> org.apache.pdfbox.text.PDFTextStripper.processPages(PDFTextStripper.java:319)
> at org.apache.pdfbox.text.PDFTextStripper.writeText(PDFTextStripper.java:266)
> at
> org.apache.pdfbox.text.PDFTextStripper.getText(PDFTextStripper.java:227){code}
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