Plack::Handler::FCGI(3)

NAME
Plack::Handler::FCGI - FastCGI handler for Plack

SYNOPSIS
  # Run as a standalone daemon
  plackup -s FCGI --listen /tmp/fcgi.sock --daemonize --nproc 10

  # Run from your web server like mod_fastcgi
  #!/usr/bin/env plackup -s FCGI
  my $app = sub { ... };

  # Roll your own
  my $server = Plack::Handler::FCGI->new(
      nproc  => $num_proc,
      listen => [ $port_or_socket ],
      detach => 1,
  );
  $server->run($app);

DESCRIPTION
This is a handler module to run any PSGI application as a standalone FastCGI daemon or a .fcgi script.

  OPTIONS

listen
        listen => [ '/path/to/socket' ]
        listen => [ ':8080' ]

    Listen on a socket path, hostname:port, or :port.

port
    listen via TCP on port on all interfaces (Same as "listen => ":$port"")

leave-umask
    Set to 1 to disable setting umask to 0 for socket open

nointr
    Do not allow the listener to be interrupted by Ctrl+C

nproc
    Specify a number of processes for FCGI::ProcManager

pid Specify a filename for the pid file

manager
    Specify either a FCGI::ProcManager subclass, or an actual FCGI::ProcManager-compatible object. If you do not want a FCGI::ProcManager but instead run in a single process, set this to undef.

      use FCGI::ProcManager::Dynamic;
      Plack::Handler::FCGI->new(
          manager => FCGI::ProcManager::Dynamic->new(...),
      );

daemonize
    Daemonize the process.

proc-title
    Specify process title

keep-stderr
    Send psgi.errors to STDERR instead of to the FCGI error stream.

backlog
    Maximum length of the queue of pending connections

  WEB SERVER CONFIGURATIONS
In all cases, you will want to install FCGI and FCGI::ProcManager. You may find it most convenient to simply install Task::Plack which includes both of these.

nginx

This is an example nginx configuration to run your FCGI daemon on a Unix domain socket and run it at the server's root URL (/).

  http {
    server {
      listen 3001;
      location / {
        set $script "";
        set $path_info $uri;
        fastcgi_pass unix:/tmp/fastcgi.sock;
        fastcgi_param  SCRIPT_NAME      $script;
        fastcgi_param  PATH_INFO        $path_info;
        fastcgi_param  QUERY_STRING     $query_string;
        fastcgi_param  REQUEST_METHOD   $request_method;
        fastcgi_param  CONTENT_TYPE     $content_type;
        fastcgi_param  CONTENT_LENGTH   $content_length;
        fastcgi_param  REQUEST_URI      $request_uri;
        fastcgi_param  SERVER_PROTOCOL  $server_protocol;
        fastcgi_param  REMOTE_ADDR      $remote_addr;
        fastcgi_param  REMOTE_PORT      $remote_port;
        fastcgi_param  SERVER_ADDR      $server_addr;
        fastcgi_param  SERVER_PORT      $server_port;
        fastcgi_param  SERVER_NAME      $server_name;
      }
    }
  }

If you want to host your application in a non-root path, then you should mangle this configuration to set the path to "SCRIPT_NAME" and the rest of the path in "PATH_INFO".

See <http://wiki.nginx.org/NginxFcgiExample> for more details.

Apache mod_fastcgi

After installing "mod_fastcgi", you should add the "FastCgiExternalServer" directive to your Apache config:

  FastCgiExternalServer /tmp/myapp.fcgi -socket /tmp/fcgi.sock

  ## Then set up the location that you want to be handled by fastcgi:

  # EITHER from a given path
  Alias /myapp/ /tmp/myapp.fcgi/

  # OR at the root
  Alias / /tmp/myapp.fcgi/

Now you can use plackup to listen to the socket that you've just configured in Apache.

  $  plackup -s FCGI --listen /tmp/myapp.sock psgi/myapp.psgi

The above describes the "standalone" method, which is usually appropriate. There are other methods, described in more detail at "Standalone_server_mode" in Catalyst::Engine::FastCGI (with regards to Catalyst, but which may be set up similarly for Plack).

See also <http://www.fastcgi.com/mod_fastcgi/docs/mod_fastcgi.html#FastCgiExternalServer> for more details.

lighttpd

To host the app in the root path, you're recommended to use lighttpd 1.4.23 or newer with "fix-root-scriptname" flag like below.

  fastcgi.server = ( "/" =>
     ((
       "socket" => "/tmp/fcgi.sock",
       "check-local" => "disable",
       "fix-root-scriptname" => "enable",
     ))

If you use lighttpd older than 1.4.22 where you don't have "fix-root-scriptname", mounting apps under the root causes wrong "SCRIPT_NAME" and "PATH_INFO" set. Also, mounting under the empty root ("") or a path that has a trailing slash would still cause weird values set even with "fix-root-scriptname". In such cases you can use Plack::Middleware::LighttpdScriptNameFix to fix it.

To mount in the non-root path over TCP:

  fastcgi.server = ( "/foo" =>
     ((
       "host" = "127.0.0.1",
       "port" = "5000",
       "check-local" => "disable",
     ))

It's recommended that your mount path does NOT have the trailing slash. If you really need to have one, you should consider using Plack::Middleware::LighttpdScriptNameFix to fix the wrong PATH_INFO values set by lighttpd.

  Authorization
Most fastcgi configuration does not pass "Authorization" headers to "HTTP_AUTHORIZATION" environment variable by default for security reasons. Authentication middleware such as Plack::Middleware::Auth::Basic or Catalyst::Authentication::Credential::HTTP requires the variable to be set up. Plack::Handler::FCGI supports extracting the "Authorization" environment variable when it is configured that way.

Apache2 with mod_fastcgi:

  --pass-header Authorization

mod_fcgid:

  FcgiPassHeader Authorization

  Server::Starter
This plack handler supports Server::Starter as a superdaemon. Simply launch plackup from start_server with a path option. The listen option is ignored when launched from Server::Starter.

  start_server --path=/tmp/socket -- plackup -s FCGI app.psgi

SEE ALSO
Plack