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Subject Author Date
Gunzip module problems Mark 11-06-2006
Posted by Mark on November 6, 2006, 4:56 pm
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Hello.

I am using IO::Uncompress::Gunzip to read zipped log files
from my web server. About 3/4 of these files fail with
"data error-3". The rest of the zipped files are processed
without difficulty.

Any ideas what might be going on here? Perhaps there is
a RFC1952 compliance issue with some of the files?

Thanks
-Mark



Posted by Paul Marquess on November 7, 2006, 4:56 am
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> Hello.
>
> I am using IO::Uncompress::Gunzip to read zipped log files
> from my web server. About 3/4 of these files fail with
> "data error-3". The rest of the zipped files are processed
> without difficulty.
>
> Any ideas what might be going on here? Perhaps there is
> a RFC1952 compliance issue with some of the files?

A "data error" usually means corruption of the compressed data stream.

An easy first step is to check if IO::Uncompress::Gunzip is telling the
truth is to see if the command line gunzip utility thinks there is a problem
with them as well. Can you try testing some of the log files that fail with
gunzup - the "-t" option will test the integrity of the file for you.

If gunzip thinks that the files are ok, can you contact me directly please?

Paul



Posted by Mark on November 7, 2006, 12:43 pm
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>
> If gunzip thinks that the files are ok, can you contact me directly
> please?

Paul:

My apologies for the false alarm. After a good night's sleep, I found
that I was not specifying FTP binary mode when downloading the
zipped files from the web server. I didn't pick up on this right away
since some of the zipped files appeared to decompress without
complaint despite the inadvertent ascii-mode transfer.

Of course everything now works as it should.

Thank you for your fine work and continued support on the
Compress::Zlib module.

-Mark



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