NAME

       Catalyst::Engine::PSGI - PSGI engine for Catalyst

SYNOPSIS

         # app.psgi
         use strict;
         use MyApp;

         MyApp->setup_engine('PSGI');
         my $app = sub { MyApp->run(@_) };

DESCRIPTION

       Catalyst::Engine::PSGI is a Catalyst Engine that adapts Catalyst into the PSGI gateway
       protocol.

COMPATIBILITY

       ·   Currently this engine works with Catalyst 5.8 (Catamoose) or newer.

       ·   Your application is supposed to work with any PSGI servers without any code
           modifications, but if your application uses "$c->res->write" to do streaming write,
           this engine will buffer the output until your app finishes.

           To do real streaming with this engine, you should implement an IO::Handle-like object
           that responds to "getline" method that returns chunk or undef when done, and set that
           object to "$c->res->body".

           Alternatively, it is possible to set the body to a code reference, which will be used
           to stream content as documented in the PSGI spec.

       ·   When your application runs behind the frontend proxy like nginx or lighttpd, this
           Catalyst engine doesn't automatically recognize the incoming headers like
           "X-Forwarded-For", because respecting these headers by default causes a potential
           security issue.

           You have to enable Plack::Middleware::ReverseProxy or
           Plack::Middleware::ForwardedHeaders to automatically promote those forwarded headers
           into "REMOTE_ADDR" hence IP address of the request.

           ReverseProxy middleware is pretty simple and has no configuration while
           ForwardedHeaders allows you to configure which upstream host to trust, etc.

AUTHOR

       Tatsuhiko Miyagawa <miyagawa@bulknews.net>

       Most of the code is taken and modified from Catalyst::Engine::CGI.

LICENSE

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

SEE ALSO

       Catalyst::Engine PSGI Plack