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https://issues.apache.org/jira/browse/PDFBOX-4781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17064673#comment-17064673
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Arnaud Jeansen commented on PDFBOX-4781:
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[~tilman] Thanks, I sent it to you privately.
AFAIR, I also tested reading its byteArrays and got the same exception, as this
also goes through the FlateFilter
> PDF files with invalid compressed streams cannot be rendered
> ------------------------------------------------------------
>
> Key: PDFBOX-4781
> URL: https://issues.apache.org/jira/browse/PDFBOX-4781
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing
> Affects Versions: 2.0.18
> Reporter: Arnaud Jeansen
> Priority: Major
>
> I am using pdfbox 2.0.18 to generate thumbnails of PDF files.
> The code is basically as follows
> {code:java}
> byte[] pdfFile = ...;
> float dpi = 72L;
> try (PDDocument pdfDocument = PDDocument.load(new
> ByteArrayInputStream(pdfFile))) {
> PDFRenderer pdfRenderer = new PDFRenderer(pdfDocument);
> return pdfRenderer.renderImageWithDPI(0, dpi, ImageType.RGB);
> } catch (IOException e) {
> // Error handling
> }
> {code}
> This works fine but for a few PDF files with an invalid compressed stream.
> Note: These PDF files open fine with a variety of PDF readers and java
> libraries. Only pdfbox seems to fail on them.
> For those files, I get an error log "FlateFilter: stop reading corrupt stream
> due to a DataFormatException" *and* an `IOException` with stacktrace
> {noformat}
> Caused by: java.io.IOException: java.util.zip.DataFormatException: invalid
> distance too far back
> at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:58)
> 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.PDPage.getContents(PDPage.java:170)
> at
> org.apache.pdfbox.pdfparser.PDFStreamParser.<init>(PDFStreamParser.java:92)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:499)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:483)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:156)
> at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:269)
> at
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:321)
> at
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:243)
> at
> org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:229)
> at
> com.foocompany.service.PdfImageService.convertFromPdfBinaryToJpegBinary(PdfImageService.java:167)
> ... 68 common frames omitted
> Caused by: java.util.zip.DataFormatException: invalid distance too far back
> at java.util.zip.Inflater.inflateBytes(Native Method)
> at java.util.zip.Inflater.inflate(Inflater.java:259)
> at java.util.zip.Inflater.inflate(Inflater.java:280)
> at org.apache.pdfbox.filter.FlateFilter.decompress(FlateFilter.java:83)
> at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:50)
> ... 82 common frames omitted
> {noformat}
> Looking further into `org.apache.pdfbox.filter.FlateFilter` :
> * The underlying `DataFormatException` (= broken content that cannot be
> decompressed when reading the stream) is forwarded up *only* if nothing could
> be read from this stream
> (see FlateFilter#decompress)
> * The `DataFormatException` is wrapped unconditionally into an `IOException`.
> (see FlateFilter#decode)
> As a hack, swallowing `DataFormatException` in `FlateFilter#decode` makes
> things work. I get an error log but a thumbnail is correctly generated.
> I am not sure how to proceed from here. I am willing to write a patch but I
> am not sure how to address this issue.
> I can also provide a PDF file that exhibits the problem privately.
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