[PDFBOX-473] attempt to push back when content read

• 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 23:31
• Updated: 21/Oct/09 09:52
• Resolved: 26/May/09 20:52

Description

I got this exception parsing a pdf doc,

Caused by: org.apache.pdfbox.exceptions.WrappedIOException
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:228)
... 2 more
Caused by: java.lang.ArrayIndexOutOfBoundsException
at java.io.PushbackInputStream.unread(PushbackInputStream.java:218)
at org.apache.pdfbox.io.PushBackInputStream.unread(PushBackInputStream.java:123)
at org.apache.pdfbox.pdfparser.BaseParser.parseCOSString(BaseParser.java:493)
at org.apache.pdfbox.pdfparser.BaseParser.parseDirObject(BaseParser.java:843)
at org.apache.pdfbox.pdfparser.PDFParser.parseObject(PDFParser.java:485)
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:169)
... 3 more

This change to BaseParser fixes it,

Index: src/main/java/org/apache/pdfbox/pdfparser/BaseParser.java
===================================================================
— src/main/java/org/apache/pdfbox/pdfparser/BaseParser.java
+++ src/main/java/org/apache/pdfbox/pdfparser/BaseParser.java
@@ -492,7 +492,10 @@
braces = 0;
}
}

• pdfSource.unread( nextThreeBytes, 0, amountRead );
  + if(amountRead > 0)
  + { + pdfSource.unread( nextThreeBytes, 0, amountRead ); + }

  if( braces != 0 )
  {
  retval.append( ch );