I have a CGI script in Perl that generates HTTP error pages by itself. I am running it under mod_perl via ModPerl::Registry, using the following Apache2 configuration:
Alias /perl "/var/www/perl"
<Directory "/var/www/perl">
SetHandler perl-script
PerlResponseHandler ModPerl::Registry
PerlOptions +ParseHeaders
Options Indexes FollowSymlinks +ExecCGI
AllowOverride None
Order allow,deny
Allow from all
</Directory>
Everything is fine, except a little problem: when HTTP status printed in headers is different than 200 (for instance 404), Apache appends a default HTML error document to my own generated response.
Take for example the following simple CGI script:
#!/usr/bin/perl
use strict;
use warnings;
use CGI qw(:standard :escapeHTML -nosticky);
use CGI::Carp qw(fatalsToBrowser);
use Apache2::Const qw(:http :common);
our $cgi = CGI->new();
print $cgi->header(-type=>'text/html', -charset => 'utf-8',
-status=> '404 Not Found');
our $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
print <<"EOF";
<html>
<head>
<title>die_error_minimal$mod_perl_version
</head>
<body>
404 error
</body>
</html>
EOF
exit;
Running it with Apache configuration mentioned above results in
HTTP/1.1 404 Not Found
Date: Sun, 27 Nov 2011 13:17:59 GMT
Server: Apache/2.0.54 (Fedora)
Connection: close
Transfer-Encoding: chunked
Content-Type: text/html; charset=utf-8
<html>
<head>
<title>die_error_minimal mod_perl/2.0.1
</head>
<body>
404 error
</body>
</html>
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL /perl/die_error_minimal.cgi was not found on this server.</p>
<hr>
<address>Apache/2.0.54 (Fedora) Server at localhost Port 80</address>
</body></html>
Note that replacing exit; in the example CGI script above with either return Apache2::Const::OK; or return Apache2::Const::DONE;, as recommended in "How do I suppress the default apache error document in mod_perl?" question on SO doesn't help -- the result stays the same.
What should I fix in my Apache configuration, or what should I add to my CGI script to suppress appending error page by mod_perl / Apache to generated response?
The FAQ works for me , after your CGI is done, after headers are sent, tell apache the status is ok, so it doesn't send ErrorDocument http://search.cpan.org/~gozer/mod_perl-1.31/faq/mod_perl_faq.pod#So_how_do_I_use_mod_perl_in_conjunction_with_ErrorDocument%3F
#!/usr/bin/perl --
use strict; use warnings;
use CGI;
Main( @ARGV );
exit( 0 );
sub Main {
my404();
#~ my $r = CGI::Simple->new->_mod_perl_request;
my $r = CGI->new->r;
$r->status(200);
return;
}
sub my404 {
my $cgi = CGI->new;
print $cgi->header( -status => 404 );
print "<html><title>print404 says tough noogies</title>
<body><h1>tough noogies</h1></body></html>";
}
__END__
GET http://localhost/perl/print404
User-Agent: lwp-request/6.03 libwww-perl/6.03
404 Not Found
Connection: close
Date: Sun, 27 Nov 2011 20:55:39 GMT
Server: Apache/2.0.54 (Win32) mod_ssl/2.0.54 OpenSSL/0.9.7g PHP/4.3.11 mod_perl/2.0.1 Perl/v5.8.9
Content-Type: text/html; charset=ISO-8859-1
Client-Date: Sun, 27 Nov 2011 20:55:39 GMT
Client-Peer: 127.0.0.1:80
Client-Response-Num: 1
Client-Transfer-Encoding: chunked
Title: print404 says tough noogies
<html><title>print404 says tough noogies</title>
<body><h1>tough noogies</h1></body></html>