If I understand what you are asking, you could run the risk of downloading and parsing the same log twice. To avoid it I suggest this:

To calculate the checksum you could use the md5sum command that you may have on your system (if you are running a Unix), or directly use Digest::MD5

I hope this helps

Update: matija is right, go his way if you have a chance!

Ciao!
--bronto

The very nature of Perl to be like natural language--inconsistant and full of dwim and special cases--makes it impossible to know it all without simply memorizing the documentation (which is not complete or totally correct anyway).
--John M. Dlugosz

In reply to Re: Downloading and parsing apache logs by bronto
in thread Downloading and parsing apache logs by juanmarcosmoren

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