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Re: Re: CGI Caching question

by dvergin (Monsignor)
on Apr 22, 2001 at 09:20 UTC ( #74535=note: print w/replies, xml ) Need Help??


in reply to Re: CGI Caching question
in thread CGI Caching question

koolade's suggestion echoes an approach that has worked well for me. Here's a bit of (slightly verbose) code to illustrate:
sub make_rand_str { my $num_chars = shift; my @possible_chr_array = @_; my $num_possibles = @possible_chr_array; my $rnd_str = ""; for (my $i=$num_chars; $i--;) { $rnd_str .= $possible_chr_array[rand($num_possibles)]; } return $rnd_str; } my $rnd_str = make_rand_str(4, "A".."Z", "0".."9"); my $url = "http://my/host/cgi/script.pl/$rnd_str",

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Re: Re: Re: CGI Caching question
by Starky (Chaplain) on Apr 23, 2001 at 10:42 UTC
    Aside from the no-cache pragma, which I find works for 98%+ of folks out there, I find the simplest and easiest way to create a unique string is just a call to time(); e.g.,
    $url = '/cgi-bin/script.pl?time=' . time();
    
    Using both of these things in combination results in 99.9% effectiveness in preventing caching. (Estimates based on a scientific survey created by top scientists which was just recently pulled out of my *.)

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