[Jython-bugs] [ jython-Bugs-1238766 ] bug in xml parser

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Bugs item #1238766, was opened at 2005-07-15 03:53
Message generated for change (Comment added) made by cgroves
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Category: None
Group: Deferred
Status: Open
Resolution: None
Priority: 4
Submitted By: Lukasz Heldt (l_heldt)
Assigned to: Charles Groves (cgroves)
Summary: bug in xml parser

Initial Comment:
Jython xml parser has a bug in xmlutils.py file.

Function skip_ws(self, necessary=0) does not raise
OutOfDataException() in case when it does not reach end
of file but surpasses data index.

This causes parser error in situation where read buffer
(self.data) ends with following characters: '<nexttag '.

Parser raises error:

index out of range: 16416, traceback:
  File "shared/python/xmlSerializer.py", line 134, in
loadSuitIncarnationString
    xml.sax.parseString(strArg, handler)
  File "Lib/xml/sax/__init__.py", line 47, in parseString
    parser.parse(inpsrc)
  File "Lib/xml/sax/drivers2/drv_xmlproc.py", line 90,
in parse
    parser.read_from(source.getByteStream(), bufsize)
  File "Lib/xml/parsers/xmlproc/xmlutils.py", line 137,
in read_from
    self.feed(buf)
  File "Lib/xml/parsers/xmlproc/xmlutils.py", line 185,
in feed
    self.do_parse()
  File "Lib/xml/parsers/xmlproc/xmlproc.py", line 96,
in do_parse
    self.parse_start_tag()
  File "Lib/xml/parsers/xmlproc/xmlproc.py", line 149,
in parse_start_tag
    if self.data[self.pos]!=">" and
self.data[self.pos]!="/":

This is caused by skip_ws function not throwing
apropriate exception in case it reaches end of buffer.
It just finishes executing setting self.pos surpassing
self.datasize.

Another sollution to that problem is to check self.pos
in function parse_start_tag after calling skip_ws() but
this problem might affect other functions also.

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>Comment By: Charles Groves (cgroves)
Date: 2006-08-30 22:48

Message:
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Could you attach a simple py file that produces this error?

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