http_errors.cgi is a simple Perl script that handles HTTP errors with a little more style than the server tends to. It does some things that Apache's mod_speling and mod_rewrite can do if so configured. The latest version of this script can always be found at
You can RTFM on Apache at
Use a simple text editor, such as notepad, to create and configure these files. If you have trouble getting
http_errors to run, or are new to CGI and Perl, see my Webhelp: Perl (online).
This script was developed on Apache in Win32. It runs on my site with Apache on Linux. Whether or not in runs correctly on other configurations I have no idea; a note on your success or failure would be appreciated though.
It handles 404 and 403 HTTP errors. Well so does the server, so what? Okay, it does a little more. And if you know Perl I encourage you to make your own additions, I have several extra functions in the script catching errors at Rock13.com. I had to simplify the thing to post it here since most of the additions are specific to my site. Of course you don't want to get too carried away; i.e. if you want a different error page for each directory then put a
.htaccess file in each directory and point to a page or script to use. Perhaps I'll get around to making a HTML interface to aid in further configuration of
http_errors.cgi. Your ideas for modifications are welcome. firstname.lastname@example.org
message.txt). A special message is given to Error 404s occurring in the
/temp/directory stating that these are temporary files. If you don't have a
/temp/don't worry about it. Also a special message is given to 404 images when the parent directory exists.
message.txtfile is optional. It will appear on every error page generated beneath any message that
You can download it in either of the following formats. Unzip them as you would any other compressed file, refer to your unzipping software or operating system for instructions.
http_errors.zip (6.1 KB)
http_errors.tar.gz ( 5.6 KB)
If you have some experience with Perl, then the comments in the
http_errors source should be adequate. However, I have tried to explain everything as clearly as possible in this document. The only thing that must be configured is the first line of the file. And you will need to create a
.htaccess file to tell your server to use
Change the first line in
http_errors.cgi to point at perl on your server. The default may work. Type
which perl from a Telnet prompt to find the location.
$cssOptional. It is the path to your Style Sheet. Either use the full URL or the complete path from your root directory.
$titleThis will be used as the document title as well as a level one heading on the page.
.htaccess is the directory-level configuration file used by Apache. (
.htaccess is the default name, it could be anything.) This is the only place you can do any configuring, given that you're allowed to do any, when you don't have access to the server root. It is a plain text file and comments are denoted with a '
#' anything following this mark on the same line is ignored by the server.
You will need to tell your server to use
http_errors.cgi. Do this by adding the following lines, edited if necessary, to your
# Error Processing ErrorDocument 404 /cgi-bin/http_errors.cgi ErrorDocument 403 /cgi-bin/http_errors.cgi
If you don't have a
.htaccess file just open a blank file and put those lines in it. In Win32 you might have trouble naming it with a . at the beginning; name it something else then rename it on the server. Note that some FTP clients may not show these 'dot-files' by default so don't be alarmed if it disappears when you rename it. Incidentally, DOS Edit will allow you to name it correctly.
message.txt will be included in each error page that is generated. Suggested content would be a link to your main index, a site search engine, and link to a site map.
Just create a plain text file and make it readable to
http_errors.cgi. This should not be a complete HTML document since it will be inserted within a document. Any uploaded files are typically world readable by default.
You should have
http_errors.cgi, a .htaccess file, and perhaps a
message.txt; now you need to upload them. Any OS worth the silicon its stored on should have a command line FTP. Alternatively you may want to download ws_ftp a popular graphical FTP program.
chmod 755 http_errors.cgi(or whatever you need to do to get it executable).
.htaccessfile to your root directory where your main index page is served from. You should not need to change permissions on this file. But
chmod 644 .htaccesswill do it.
Maybe you screwed up. Alright, I haven't run this on a wide variety of systems and am a novice perl programmer. So if you encounter a problem let me know at <email@example.com>.
Copyright©2001 Rob - Rock13.com