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All hope is not lost - 404 Errors

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In a previous article, I discussed the advantages of using a
customized 404 error page on your site and gave instructions on
how to create one. As I explained back then, these pages are
highly useful because they enable you to benefit from traffic
that would otherwise be lost. They however do have one dark side
that can make maintaining your site significantly more difficult
than what it has been before.

What is this problem I'm talking about? Well, it is quite
simple. Usually when a server encounters a 404 error, it records
the details about the event into its log file. Should you
suddenly notice that the log shows multiple 404 errors due to a
page named "abutme.html" not being found, you can deduct that
you've probably accidentally linked to "abutme.html" somewhere
on your pages instead of using the correct filename
"aboutme.html". As you can see from the above, the functionality
offered by log files makes them a great help in tracking down
such simple mistakes and enables you to keep your site
relatively free of in-site broken links.

However, if you happen to have replaced the standard 404 error
with your own HTML 404 error page, you can't utilize this useful
feature. Yes, you will still see that a 404 error has occurred,
but you won't get any further details that would help you figure
out what exactly happened. Finding and fixing these errors
becomes nearly impossible, causing them to pile up over time and
deteriorate the professional image of your site. Now you're
facing the tough choice of either showing your visitors a very
unfriendly error message that drives them away or accepting the
fact that your stylish custom 404 error page will become an all
too familiar sight to those who click around your site.

All hope is not lost

After reading the above, you must be feeling pretty down. I sure
know I did after having installed my own 404 page only to notice
that I had corrected one problem, but caused another one while
doing it. Still, there is a solution to every difficult situation
and this one is no exception. If you want to keep your 404 page
and still get informed when you mess things up and create a
broken link, you'll be pleased to hear that I happen to have just
the thing for the job. Before we begin, please take into account
that in order to use this fix, your host has to be running Apache
with support for .htaccess files, Server Side Includes (SSI) and
CGI. Contact your technical support for information on whether
you have access to these valuable features or not.

Without further ado, let's roll up our sleeves and get to
work. The first thing you will need is a CGI script that will
log the errors and let you know about them. There are several
ones out there that you can use, but I personally prefer
Matrix Vault's free 404 Helper that can be found at . Download
the source code to your hard drive and open it in a text editor.
You can get free editors from the Net, but the old MS-DOS Edit
supplied with just about every version of Windows will do just
fine. To run Edit, go to Start, Run, type "edit" without the
quotes into the box and click OK.

Before you start editing the file, you'll need to know where your
host has installed the Perl interpreter and Sendmail. Once you
have figured it out, check if the paths used in the CGI script
match those your host uses. The Perl interpreter's location is
set to /usr/bin/perl in the first row and the location of
Sendmail is set to /usr/lib/sendmail in the 21st row. Make
changes, if necessary.

After you have made sure that the paths are correct, modify the
rest of the script to suit your needs. Be sure to replace the
E-mail address in the $email field with the one you want the
error report to be sent to. You might also wish to use a smaller
value in the $mailon field than the default of 10, as it can
take quite a while for a small site to generate enough 404
errors to fill up a 10K log. I suggest using a value of 1 or 2 at
the beginning and raising it later if you feel that you are
receiving the error reports more often than you'd like to.

You're now done with the CGI script. Save it as "404helper.cgi",
without the quotes of course. However, there's still work to be
done, so take a deep breath and prepare yourself for the next

Editing your custom 404 page and .htaccess file

Just having the script will not be enough. In order for it to
work, it has to be executed when an error is encountered. This is
the part where the SSI's step into the picture. Open up your 404
error page in a text editor and add the following line into it:

Because the script prints out a few rows of HTML after it has
been run, the best place for that line is at the bottom of your
404 error page, but before the tag. After everything is
safely in place, simply save the file, but instead of ending it
with the usual ".htm" or ".html", use ".shtml". Do not forget to
do this, as the SSI tag might not work if you fail to use the
proper extension.

Finally, you will have to edit the .htaccess file you created
when you built your custom 404 page. If you only have
" ErrorDocument 404 "
in it, modify the file so that it will contain the following:

Options Includes ExecCGI
AddType application/x-httpd-cgi .cgi .pl
AddType text/html .shtml
AddHandler server-parsed .shtml
ErrorDocument 404

The new lines will enable Server Side Includes and CGI so that
your script will work. Do not forget to change the ErrorDocument
404 line to point to the new .shtml page instead of your old
.html version. After you are done, save your .htaccess file.

Upload, set permissions and launch!

Connect to your host with an FTP program and upload the .shtml
version of your 404 page and your new .htaccess file into your
root directory. Then go to the directory you've reserved for CGI
programs and send the 404helper.cgi file there. Make sure that
you upload in ASCII, not in Binary mode! I nearly drove myself
crazy by accidentally using Binary mode and then trying to figure
out why the script refused to work.

Everything is now uploaded and all that remains is to set
permissions so that the CGI program can be executed. You'll need
to CHMOD 755 both the CGI file and the directory where it is in.
The steps you need to take in order to accomplish this depend on
what software you are using, but here are the instructions on
how to do so with WS_FTP, a popular Windows FTP program which can
be downloaded from

First, navigate to the directory where you've uploaded the CGI
program. Left-click it once to highlight the file, then right-
click it. Select "chmod (Unix)" from the menu that appears. Give
Read, Write and Execute permissions to the Owner and Read and
Execute permissions to Group and Other. Then go into the root
directory and repeat the same process with the folder of the
directory where you placed the CGI program.

That's it. The work is finally done and you can now enjoy the
luxury of receiving an E-mail report on all 404 errorsFree Reprint Articles, allowing
you to quickly stomp out any broken links and improve the
quality of your site. Congratulations!

Article Tags: Error Page

Source: Free Articles from


Lauri Harpf runs the A Promotion Guide website, where he
offers free information about search engines, directories
and other promotion methods. His site can be found at

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