I run a little script on my server where people can moderate a link (basically up & downvotes). This is run in a CGI::Application I wrote myself, but I'm having a bit of troubles finding a better way to prevent the users from voting multiple times (I don't need top security or anything, I just don't want easy ballotstuffing).
So far, my code looks like this:
sub link_moderate
{
my $self = shift;
my $q = $self->query();
my $output = "";
my $tmpl = $self->load_tmpl('.tmpl');
my $uri = $q->param('uri')||"";
my $direction = $q->param('direction')||"";
#FIX!! (check for existence of URL)
my $statementHandle = $Database->prepare("SELECT COUNT(*) FROM mod
+eration WHERE userkey LIKE '".$q->remote_addr."-$uri';");
my $returnValue = $statementHandle->execute;
my @results = $statementHandle->fetchrow_array;
if ($results[0] >= 1)
{
$tmpl->param('message' => "Ahem, you've alredy voted at this.
+Stop doing it, you won't get any further.");
}
else
{
if ($direction eq "up")
{
my $returnValueStatus = $Database->do("UPDATE saved_search
+ SET moderation=moderation+1 WHERE uri LIKE '$uri';");
$returnValueStatus = $Database->do("INSERT INTO moderation
+ VALUES('".$q->remote_addr."-$uri');");
if ($returnValueStatus == 1)
{
$tmpl->param('message' => "The moderation value for th
+e url has been updated.");
}
else
{
$tmpl->param('message' => "The URL could not be found
+in the database.");
}
}
elsif ($direction eq "down")
{
my $returnValueStatus = $Database->do("UPDATE saved_search
+ SET moderation=moderation-1 WHERE uri LIKE '$uri';");
$returnValueStatus = $Database->do("INSERT INTO moderation
+ VALUES('".$q->remote_addr."-$uri');");
if ($returnValueStatus == 1)
{
$tmpl->param('message' => "The moderation value for th
+e url has been updated.");
}
else
{
$tmpl->param('message' => "The URL could not be found
+in the database.");
}
$Database->do("DELETE FROM saved_search WHERE moderation <
+= -15;");
}
else
{
$tmpl->param('message' => "Eh, what direction would '$dire
+ction' be?");
}
}
$tmpl->param('version' => $VERSION);
$tmpl->param('number_of_links' => &get_number_of_links);
$tmpl->param('list_urls' => &getlast(10));
$output = clean_html($tmpl->output);
$self->header_props(-Content_length=>length($output));
return $output;
}
As you can see, there goes an awful lot of data into the moderation table, and it's generally not very pretty.
Any thoughts on this?
Edit kudra,
2002-10-27
Added a readmore tag
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