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is there something wrong with this code?

by emcb (Beadle)
on May 18, 2002 at 21:20 UTC ( #167558=perlquestion: print w/replies, xml ) Need Help??

emcb has asked for the wisdom of the Perl Monks concerning the following question:


I have written this little piece of code to act as a sucessful-hit logger on my home-page and i cant for the life of me get it to work.

Here's the code if anyonw wouldnt mind taking a look:

#!/usr/bin/perl # # To use this just insert this line into any html file you # want to hit: # # <!--exec cgi="/cgi-bin/hitlogger.cgi"--> # print "Content-Type: text/html\n\n"; print "HELLO\n"; # Gather all of the log strings $dateprog = "/bin/date"; $server_protocol = $ENV{'SERVER_PROTOCOL'}; $remoth_host = $ENV{'HTTP_X_FORWARDED_FOR'} || $ENV{'REMOTE_ADDR'}; $user_agent = $ENV{'HTTP_USER_AGENT'}; $request_method = $ENV{'REQUEST_METHOD'}; $request_uri = $ENV{'REQUEST_URI'}; $request = "$request_method $request_uri $server_protocol"; $date = `$dateprog`; chomp $date; $log_strig = "$remote_host - - [$date] \"$request\" 200 -"; # open the log and output the log string open( LOG, ">/home/exposu/logs/web_access.log.txt" ) || die "$!\n"; print LOG "$log_string\n"; close LOG;



Replies are listed 'Best First'.
•Re: is there something wrong with this code?
by merlyn (Sage) on May 18, 2002 at 21:22 UTC
    There's something wrong with the code in principle: as in, hit counters are bad -- you should be grepping the logs instead, and even those are wrong because of proxies and caching.

    But specifically, this code:

    open( LOG, ">/home/exposu/logs/web_access.log.txt" ) || die "$!\n";
    makes this a "one hit wonder". {grin} Each new hit overwrites the previous file instead of appending it. Change your > to a >> there.

    -- Randal L. Schwartz, Perl hacker

      I realiased this and hit back to change it and re-submit after preview, but it did'nt work. And im ashamed that i left out the '-w'! Sorry the open has the '>>' but i cant edit it now, or can i?
Re: is there something wrong with this code?
by DamnDirtyApe (Curate) on May 18, 2002 at 22:14 UTC
    Two comments here:
    1. use strict; would inform you of at least two typos in your variable names -- $remoth_host and $log_strig.
    2. Do the permissions on the dir/file you are attempting to write to allow write access to your web server? If not, no log.
    Hope that helps steer you in the right direction.
    D a m n D i r t y A p e
    Home Node | Email
Re: is there something wrong with this code?
by perigeeV (Hermit) on May 19, 2002 at 11:34 UTC

    <!--exec cgi="/cgi-bin/hitlogger.cgi"-->

    You're missing the hash before exec: <!--<bold>#</bold>exec...
    When you use the exec SSI, script output is not included into the document. I assume that's what you intend with print "HELLO\n";. For that you need to use

    <!--#include virtual="/cgi-bin/hitlogger.cgi"-->

    Here's the docs.

    There are plenty of log analysis tools out there, though.

Re: is there something wrong with this code?
by Parham (Friar) on May 19, 2002 at 13:46 UTC
    i noticed this which doesn't seem right:
    $log_strig = "$remote_host - - [$date] \"$request\" 200 -";
    you might want to add the 'n' in $log_strig, same goes for $remoth_host.

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