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are different, but Apache::Registry is not RFC compliant and
causes trouble with some modern browsers.  This module attempts
to correct the wrong in Apache::Registry by intercepting headers
much in the way that mod_perl does, but then respecting the value 
of $r->header_only.

NOTES

Apache::HEADRegistry is a subclass of Apache::RegistryNG, which
means that it doesn't behave _exactly_ the same as Apache::Registry.
Namely, it uses the filename of the script to determine the 
unique package namespace, whereas Apache::Registry uses the URI.
HEADRegistry also does not do any of the auto-dereferencing in its
print() method - if you want that type of thing, then you are
obviously relying on the mod_perl API and can therefore check
$r->header_only yourself.  This module is meant for those who
want mod_cgi emulation only.

FEATURES/BUGS

The only current bug seems to be for scripts that handle redirects,
such as:

use CGI;
$cgi = CGI->new;
print $cgi->redirect ("http://www.foo.com/");

or 

print "Location: http://www.foo.com/";

What happens is that the default Apache 302 error is displayed
instead of just the headers.  This is a bug both with Apache::Registry
and Apache::HEADRegistry and seems to lie with mod_perl and it's
internal messing with the $r->assbackwards flag (but I'm not entirely
sure).

This module also does not handle write() calls at the moment - if
you have a need for that let me know.

SEE ALSO

perl(1), mod_perl(3), Apache(3), Apache::Registry(3), 
Apache::RegistryNG

AUTHOR

Geoffrey Young <geoff@modperlcookbook.org>

COPYRIGHT

Copyright (c) 2002, Geoffrey Young.
All rights reserved.

This module is free software.  It may be used, redistributed
and/or modified under the same terms as Perl itself.

HISTORY

This code is derived in part from examples in the 
"The mod_perl Developer's Cookbook"

For more information, visit http://www.modperlcookbook.org/

It also contains code lifted from various mod_perl internal
sources, such as Apache.pm and mod_perl.c, and LWP.  Thanks
all for being good open source contributors.