[PDFBOX-470] corrupt zip stream causes document to not parse

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.8.0-incubator
• Fix Version/s: 0.8.0-incubator
• Assignee: Unassigned
• Reporter: Sean Bridges
• Created: 13/May/09 17:15
• Updated: 21/Oct/09 09:52
• Resolved: 03/Jul/09 16:14

Description

This is with svn revision 774426

PDFParser is not very forgiving with respect to bad compressed input streams. I am processing a set of 13,000 pdf files, and I see 10 exceptions of the form,

Caused by: java.io.EOFException: Unexpected end of ZLIB input stream
at java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:223)
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:141)
at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:101)
at org.apache.pdfbox.cos.COSStream.doDecode(COSStream.java:301)
at org.apache.pdfbox.cos.COSStream.doDecode(COSStream.java:221)
at org.apache.pdfbox.cos.COSStream.getUnfilteredStream(COSStream.java:156)
at org.apache.pdfbox.pdfparser.PDFStreamParser.<init>(PDFStreamParser.java:87)
at org.apache.pdfbox.cos.COSStream.getStreamTokens(COSStream.java:118)
at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:204)
at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:176)
at org.apache.pdfbox.util.PDFTextStripper.processPage(PDFTextStripper.java:358)
at org.apache.pdfbox.util.PDFTextStripper.processPages(PDFTextStripper.java:282)
at org.apache.pdfbox.util.PDFTextStripper.writeText(PDFTextStripper.java:238)
at org.apache.pdfbox.util.PDFTextStripper.getText(PDFTextStripper.java:171)

And one,

Caused by: java.util.zip.ZipException: invalid bit length repeat
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:147)
at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:101)
at org.apache.pdfbox.cos.COSStream.doDecode(COSStream.java:301)
at org.apache.pdfbox.cos.COSStream.doDecode(COSStream.java:221)
at org.apache.pdfbox.cos.COSStream.getUnfilteredStream(COSStream.java:156)
at org.apache.pdfbox.pdfparser.PDFStreamParser.<init>(PDFStreamParser.java:87)
at org.apache.pdfbox.cos.COSStream.getStreamTokens(COSStream.java:118)
at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:204)
at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:176)
at org.apache.pdfbox.util.PDFTextStripper.processPage(PDFTextStripper.java:358)
at org.apache.pdfbox.util.PDFTextStripper.processPages(PDFTextStripper.java:282)
at org.apache.pdfbox.util.PDFTextStripper.writeText(PDFTextStripper.java:238)
at org.apache.pdfbox.util.PDFTextStripper.getText(PDFTextStripper.java:171)

It would be nice if we could recover from this error, rather than failing to parse the file. By commenting out line 314 of COSStrean

if( !done )

{ //throw exception; }

The parser works correctly, and I am able to extract text from these documents.