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#!/usr/bin/perl
# This is a sample script that may be used to create domain specific
# unique ID's rather than using UUID. In a typical scenario, this HTID
# generator would reside in the same domain as the target server, so
# that it could be used by any clients of the server. While use of UUID
# as a unique identifier is perfectly fine, use of a remote generator
# gives additional benefits, such as the ability to collect metrics on
# identity requestors.
print "Content-type:text/html\n\n";
$htid = $ENV{'REMOTE_ADDR'};
open(IN,"counts.txt") or dienice("Can't open counts.txt for writing: $!");
flock(IN,2); # lock the file
seek(IN,0,0); # rewind it to the beginning
$oldtimestamp = <IN>; # read only the first line.
$save_time = $oldtimestamp;
close(IN);
$timestamp = time;
if ($oldtimestamp == $timestamp)
{
open (IN2, "sec_id.txt") or
dienice ("Can't open sec_id.txt for writing: $!");
flock (IN2, 2);
seek (IN2, 0, 0);
$secondary_id = <IN2>;
# increment the secondary id
++$secondary_id;
close (IN2);
}
else {
$secondary_id = 0;
}
open(OUT2,">sec_id.txt") or
dienice("Can't open outdata.txt for writing: $!");
flock(OUT2,2); # lock the file
seek(OUT2,0,0); # rewind it to the beginning
print OUT2 "$secondary_id";
close(OUT2);
#save the timestamp for next time
$oldtimestamp = $timestamp;
open(OUT,">counts.txt") or dienice("Can't open outdata.txt for writing: $!");
flock(OUT,2); # lock the file
seek(OUT,0,0); # rewind it to the beginning
print OUT "$oldtimestamp\n";
close(OUT);
$result_string = join (".$timestamp", $htid, ".$secondary_id");
print <<EndOfHTML;
$result_string
EndOfHTML
|
