href="<%db_cgi_url%>/jump2.cgi?ID=<%ID%>"><Download File></a>

$db_url2_name = "$db_script_path/data/url2.db"; # PATH to URL2 lookup database.
$db_hits2_path = "$db_script_path/data/hits2"; # PATH to hits2 directory.

#!/usr/local/bin/perl
# -------------
# Links
# -------------
# Links Manager
#
# File: jump2.cgi
# Description: Increments the number of hits for the specified link,
# and sends the user off to the appropriate page. # Uses ID to jump to a second URL, and records hits in a second database.
# Author: Alex Krohn
# Email: alex@gossamer-threads.com
# Web: http://www.gossamer-threads.com/
# Version: 2.01
#
# (c) 1998 Gossamer Threads Inc.
#
# This script is not freeware! Please read the README for full details
# on registration and terms of use.
# =====================================================================
#
# Form Input:
# '$db_key' = key number # Send as form input the key name and key value
# # of the link you want to go to.
#
# Setup:
# Make sure the require statement below points to the config file. # Required Librariers
# --------------------------------------------------------
eval {
($0 =~ m,(.*)/[^/]+,) && unshift (@INC, "$1"); # Get the script location: UNIX /
($0 =~ m,(.*)\\[^\\]+,) && unshift (@INC, "$1"); # Get the script location: Windows \



require "admin/links.cfg"; # Change this to full path to links.cfg if you have problems.
require "$db_lib_path/db_utils.pl";
require "$db_lib_path/links.def";
};
if ($@) {
print "Content-type: text/plain\n\n";
print "Error including libraries: $@\n[/url]";
print "Make sure they exist, permissions are set properly, and paths are set correctly.";
}



# ========================================================

eval { &main; }; # Trap any fatal errors so the program hopefully
if ($@) { &cgierr("fatal error: $@"); } # never produces that nasty 500 server error page.
exit; # There are only two exit calls in the script, here and in in &cgierr.



sub main {
# --------------------------------------------------------
my %in = &parse_form();
my ($goto, $id, $delim, $time);

$id = $in{$db_key};
$delim = quotemeta($db_delim);
$time = time();

if ($id eq "random") {
my ($count, $rand, $find);



# Pull out the total number of links.
open (COUNT, "<$db_hits2_path/index.count") or &error ("unable to open index count file: $db_hits2_path/index.count. Reason: $!");
$count = int <COUNT>;
close COUNT;



# Get the random line from the url lookup database.
srand;
$find = 0; $rand = int (rand ($count + 0.5)); ($rand == $count) and ($rand--);
open (URL, "<$db_url2_name") or &error ("unable to open url database: $db_url2_name. Reason: $!");
while (<URL>) {
$find++ == $rand or next;
/\d+$delim(.+)/o or next;
$goto = $1;
last;
}
close URL;
$goto or &error ("Can't find random line: $rand.");
}
elsif (exists $in{$db_key}) {
# Make sure this is a valid looking id.
($id =~ /^\d+$/) or &error ("Invalid id: $id");



# Let's get the URL.
open (URL, "<$db_url2_name") or &error ("unable to open url database: $db_url2_name. Reason: $!");
while (<URL>) {
(/^$id$delim(.+)/o) or next;
chomp ($goto = $1);
last;
}
close URL;
$goto or &error ("Can't find link id: $id");



# Bump the counter one.
if (open (HIT, "<$db_hits2_path/$id")) {
my ($count, $old_time, @IP, $ip, $visited);
chomp ($count = <HIT>);
chomp ($old_time = <HIT>);
chomp (@IP = <HIT>);
(($time - $old_time) > 21600) and (@IP = ());
foreach $ip (@IP) {
$ip eq $ENV{'REMOTE_ADDR'} and ($visited++ and last);
}
if (!$visited) {
push (@IP, $ENV{'REMOTE_ADDR'});
$count = $count + 1;
open (HIT, ">$db_hits2_path/$id") or &error ("Can't open for output counter file. Reason: $!");
if ($db_use_flock) { flock (HIT, 2) or &error ("Can't get file lock. Reason: $!"); }
local $" = "\n";
print HIT "$count\n$time\n@IP";
close HIT;
}
}
else {
open (HIT, ">$db_hits2_path/$id") or &error ("Can't increment counter file. Reason: $!");
print HIT "1\n$time\n$ENV{'REMOTE_ADDR'}";
close HIT;
}
}
else {
&error ("No link specified!");
}

# Now let's send the user to the url..
$goto ?
print "Location: $goto\n\n" :
&error ("Record not found ($in{$db_key})");
}



sub error {
# ------------------------------------------
#
print "Content-type: text/plain\n\n";
print "Error: $_[0]\n";
exit;
}