Catalyst::Engine::PSGI(3)

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

WARNINGS
Catalyst 5.9000 or later has a built-in PSGI support and this module is deprecated.

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 ouput 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