Re: Exists with DBM

Thank you Monks.

I have made the suggested changes, but I haven't fixed all the problems. Now I get everything open, but on the server I get a software error with no information as to what the error is. On the CLI I get no error, but the output stops as soon as the script gets into the "if(exists ($allIPs{$userIP}))" loop, it prints the first line, and nothing else. The nested loop just doesn't seem to be activated at all. Any suggestions?

~~Guildencrantz

#!/usr/bin/perl -wT
#
# Script:  Dynamic Dungeon Siege IP Database Activate IP Script
# Author:  Guildencrantz
# Version: 4-13-02
#

use strict;
use DB_File;

use CGI;
use CGI::Carp 'fatalsToBrowser';
my $q = new CGI;
my $userIP = $q->remote_host;

my $allIPsPath = "/var/www/cgi-bin/ds/database/allIPs.db";
my $activeIPsPath = "/var/www/cgi-bin/ds/database/activeIPs.db";

tie my %allIPs, "DB_File", $allIPsPath 
    or die "Cannot open allIPs database: $!";

tie my %activeIPs, "DB_File", $activeIPsPath
    or die "Cannot open activeIPs database: $!";

print "userIP = $userIP\n";
print "userdata = $allIPs{$userIP}\n";

if( exists $allIPs{$userIP} ) {
print "exists in allIPs\n";
    if( exists $activeIPs{$userIP} ) {
print "exists in activeIPs\n";
        print "Content-type: html/text";
        
        print <<END_OF_BLOCK;
        
        <HTML>
        
        <HEAD>
                        <META HTTP-EQUIV="Refresh" CONTENT="5; URL=/ds
+-cgi/viewActive.pl">
            <TITLE>ACTIVE</TITLE>
        </HEAD>
        
        <BODY>
        
        <H1>Your IP is already marked as active!</H1>
        
        <P>
           <A HREF="/ds-cgi/viewActive.pl">
              You will be forwarded in 5 seconds 
                   </A>
        </P>
        
        </BODY>
        </HTML>
        
END_OF_BLOCK    
        }
    else {
print "does not exist in activeIPs\n";
        $activeIPs{$userIP} = $allIPs{$userIP};
print "active IPs= $activeIPs{$userIP}\n";        
        print "Content-type: html/text";
        
        print <<END_OF_BLOCK;
        
        <HTML>
        
        <HEAD>
                        <META HTTP-EQUIV="Refresh" CONTENT="5; URL=/ds
+-cgi/viewActive.pl">
            <TITLE>Added!</TITLE>
        </HEAD>
        
        <BODY>
        
        <H1>Your IP has been activated!</H1>
        
                <P>
           <A HREF="/ds-cgi/viewActive.pl">
              You will be forwarded in 5 seconds
           </A>
        </P>

        </BODY>
        </HTML>
        
END_OF_BLOCK
    }
}
else {
    print "Content-type: text/html\n\n";
    
    print <<END_OF_BLOCK;
    
    <HEAD>
                <META HTTP-EQUIV="Refresh" CONTENT="5; URL=/ds/submit.
+html">
        <TITLE>IP Not Registered</TITLE>
    </HEAD>
    
    <BODY>
    
    <H1>There is no entry in the database for this IP.  You must regis
+ter this
        IP and the associated server attributes</H1>
        
    <P>
           <A HREF="/ds/submit.html">
            You will be forwarded in 5 seconds
           </A>
    </P>
    
    </BODY>
    </HTML>
    
END_OF_BLOCK
}

untie %activeIPs;
untie %allIPs;
[download]

Comment on Re: Exists with DBM Download Code

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Re: Re: Exists with DBM
by grep (Monsignor) on Apr 14, 2002 at 00:14 UTC

Good, you have identitfied a case that works and one that doesn't (i.e. CLI and browser). Now just narrow down the problems.
Ask yourself:

What am I doing to get it to display on the browser?
What does a '500 Server Error' mean (that was your error? wasn't it?).

I see a couple of problems:

You're doing your headers in a manner that could be incorrect or at least inconsistiant.
```
print "Content-type: html/text";
        
        print <<END_OF_BLOCK;
        
        <HTML>
[download]
```
This is highly dependant on how your editor does line endings. use print "Content-type: html/text\n\n"; even better use that CGI module that you loaded print $q->header();
You are printing several things before you print your headers

Both of these things will cause a '500 Server Error'. Whenever you see a 500 error, you should check your log file. The log file will generally point you in the right direction

2 excellent resources for your CGI programming quests:
tachyon's CGI Help Guide
Ovid's Ovid's Web Programming with Perl

grep
Unix - where you can thrown the manual on the keyboard and get a command

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