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 a 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 <[email protected]>

   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

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