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Re^2: Ignoring not well-formed (invalid token) errors

by Krambambuli (Curate)
on Jan 19, 2015 at 11:49 UTC ( #1113740=note: print w/replies, xml ) Need Help??


in reply to Re: Ignoring not well-formed (invalid token) errors
in thread Ignoring not well-formed (invalid token) errors

If the errors you're seeing fit on single lines and follow some patterns - like in the example you've shown - it might suffice to filter the bad file through something simple like say
perl -ne 'print $_ if not m/^<es\s*$/' <bad_input.file >corrected_inpu +t.file
That 'ignores' the fact that there's anything about XML and as such could be fast enough to be usable, even if it is an extra step.

Krambambuli

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Re^3: Ignoring not well-formed (invalid token) errors (pipeline)
by tye (Sage) on Jan 19, 2015 at 15:58 UTC

    If you do it like:

    perl -ne'print $_ if ! /^<es\s*$/' huge.xml | perl extract.pl -

    Then you don't even have to wait for the huge file to be read twice. The time required could well be almost the same as it would be without the filter. Since the filter code likely can run faster than the XML parsing code, the difference in run-time could just be the insignificant time it takes to filter one buffer's worth of XML. It would likely take a bit more CPU (probably less than 2x), but I doubt processing a huge XML file is usually CPU-bound on most systems.

    Though, brettski didn't seem to find even that proposal acceptable when I proposed it in chat around the time that the root node was posted.

    - tye        

      Tye, I must have not understood your proposal in the chatterbox. My apologies. This is good and I could use it on a case by case basis. I don't know 100% that I will always see the same line but I can substitute a different regex if necessary. I'm hoping this is just a rare occurrence and I will know more as I work with these files on a more regular basis.

      I was hoping there was some kind of exception handling that could catch this kind of error and move on. Though I know this goes against the XML doctrine on poorly formed XML

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