CGI::Emulate::PSGI(3pm) 				User Contributed Perl Documentation				   CGI::Emulate::PSGI(3pm)

NAME

       CGI::Emulate::PSGI - PSGI adapter for CGI

SYNOPSIS

	   my $app = CGI::Emulate::PSGI->handler(sub {
	       # Existing CGI code
	   });

DESCRIPTION

       This module allows an application designed for the CGI environment to run in a PSGI environment, and thus on any of the backends that PSGI
       supports.

       It works by translating the environment provided by the PSGI specification to one expected by the CGI specification. Likewise, it captures
       output as it would be prepared for the CGI standard, and translates it to the format expected for the PSGI standard using CGI::Parse::PSGI
       module.

CGI.pm
       If your application uses CGI, be sure to cleanup the global variables in the handler loop yourself, so:

	   my $app = CGI::Emulate::PSGI->handler(sub {
	       use CGI;
	       CGI::initialize_globals();
	       my $q = CGI->new;
	       # ...
	   });

       Otherwise previous request variables will be reused in the new requests.

       Alternatively, you can install and use CGI::Compile from CPAN and compiles your existing CGI scripts into a sub that is perfectly ready to
       be converted to PSGI application using this module.

	 my $sub = CGI::Compile->compile("/path/to/script.cgi");
	 my $app = CGI::Emulate::PSGI->handler($sub);

       This will take care of assigning an unique namespace for each script etc. See CGI::Compile for details.

       You can also consider using CGI::PSGI but that would require you to slightly change your code from:

	 my $q = CGI->new;
	 # ...
	 print $q->header, $output;

       into:

	 use CGI::PSGI;

	 my $app = sub {
	     my $env = shift;
	     my $q = CGI::PSGI->new($env);
	     # ...
	     return [ $q->psgi_header, [ $output ] ];
	 };

       See CGI::PSGI for details.

METHODS

       handler
	     my $app = CGI::Emulate::PSGI->handler($code);

	   Creates a PSGI application code reference out of CGI code reference.

       emulate_environment
	     my %env = CGI::Emulate::PSGI->emulate_environment($env);

	   Creates an environment hash out of PSGI environment hash. If your code or framework just needs an environment variable emulation, use
	   this method like:

	     local %ENV = (%ENV, CGI::Emulate::PSGI->emulate_environment($env));
	     # run your application

	   If you use "handler" method to create a PSGI environment hash, this is automatically called in the created application.

AUTHOR

       Tokuhiro Matsuno <tokuhirom@cpan.org>

       Tatsuhiko Miyagawa

COPYRIGHT AND LICENSE

       Copyright (c) 2009-2010 by tokuhirom.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       The full text of the license can be found in the LICENSE file included with this module.

SEE ALSO

       PSGI CGI::Compile CGI::PSGI Plack CGI::Parse::PSGI

perl v5.14.2							    2012-03-18						   CGI::Emulate::PSGI(3pm)