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Re: check *.tmp wether it's a zip or not

by guha (Priest)
on Nov 26, 2004 at 11:17 UTC ( #410559=note: print w/replies, xml ) Need Help??


in reply to check *.tmp wether it's a zip or not

My quick tests show that a zip file's first four bytes seem to be 50 4B 03 04 in hexadecimal notation. That should allow you to filter out most of the non-zip files.

Then you could use your zip->read() in a block eval to trap those other files that starts with the magic byte sequence.

However, consider this a hack to be used only if you can't find a better-founded idea.

Update:
Well it seems it couldn't be better founded. The byte sequence is described in the format documentation as the "Local file header signature".

  • Comment on Re: check *.tmp wether it's a zip or not

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Re^2: check *.tmp wether it's a zip or not
by Anonymous Monk on Nov 26, 2004 at 11:44 UTC
    Thanks,
    for your replies, I've installed File::Type that works.
    But I've written to the author of Archive::Zip, that such a test might be usefull to include.

    Carl

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[MidLifeXis]: (5.22 at that time)
[MidLifeXis]: Yeah, I know, really helpful :-)
[Corion]: If all else fails, Spreadsheet::XLSX should be "installable" by manually copying the files, provided that the prerequisites are met
[thezip]: It fails in the "formatted 2-digit numeric" tests
[thezip]: Okay Corion, that's what I wanted to hear. Thanks!
[Corion]: Oh, a test failure... Just force-install it then? --force and potentially --notest to skip the tests alltogether ?
[ambrus]: thezip: is Activestate Perl usable for your scenario instead?
[MidLifeXis]: Yeah, --notest is good, not sure I would do --force.
[thezip]: It fails 2/10 tests in that group. What are the ramifications if I force it? What should I look for for?
[thezip]: I've migrated from ActiveState to Strawberry. No going back...

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