This exact question and many exactly like it are answer in the mod_perl Guide (which appears to be down as I write this). This is one of the most frequently asked questions by people starting.

Also, 'man cgi_to_mod_perl'.

I set the PerlSendHeader to 'off' in my httpd.conf configuration but i am still getting a content-type header printed out by apache. Under mod_perl this test script outputs to my browser the following:

Content-type:image/gif
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Here's my test.cgi script which is inside my mod_perl directory (/home/httpd/perl/).

#!/usr/bin/perl -w
use strict;
if ($ENV{'MOD_PERL'}){
print "Content-type:image/gif\n\n";
#my image output will go here
}else{
print "Content-type:text/html\n\n";
print "MOD_PERL is off";
}
exit;
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And here's my httpd.conf settings.

<IfModule mod_perl.c>
  Alias /perl/ /home/httpd/perl/
  <Location /perl>
    SetHandler perl-script
    PerlHandler Apache::Registry
    Options +ExecCGI
    PerlSendHeader off
  </Location>
</IfModule>
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I restarted apache and did a killall -HUP apache. As you can see by the output of the script, mod_perl is working. I'm running mod_perl/1.23. Anybody have any ideas on how i can fix this? I'd like to be able to output more than just text/html files with mod_perl.

thanks monks,
james

p.s. i tried "PerlSendHeader off" and "PerlSendHeader Off"

It's the other way around. PerlSendHeader should be *ON*. From the ModPerl documentation:

The PerlSendHeader On directive tells mod_perl to intercept anything that looks like a header line (such as Content-Type: text/plain) and automatically turn it into a correctly formatted HTTP/1.0 header, the same way it happens with CGI scripts running under mod_cgi. This allows you to keep your CGI scripts unmodified.

oh crap, you are absolutely right. lol. May my stupidity be a shining beacon for those who follow in my footsteps.
thanks very much.
jtrue

• Why is this under "CGI Programming"? mod_perl is not mod_cgi. Different technologies.
• What is your current configuration? Are you talking about Apache::Registry or some other pre-rolled handler or a handler of your own?