Catalyst::Engine::FastCGI - FastCGI Engine
This is the FastCGI engine.
This class overloads some methods from
Starts the FastCGI server.
$listen is set,
then it specifies a location to listen for FastCGI requests;
listen via Unix sockets on /path
listen via TCP on port on all interfaces
listen via TCP on port bound to hostname
Options may also be specified;
Set to 1 to disable setting umask to 0 for socket open =item nointr
Do not allow the listener to be interrupted by Ctrl+C
Specify a number of processes for FCGI::ProcManager
Specify a filename for the pid file
Specify a FCGI::ProcManager sub-class
Detach from console
Send STDERR to STDOUT instead of the webserver
Performs the first part of daemon initialisation. Specifically, forking. STDERR, etc are still connected to a terminal.
Performs the second part of daemon initialisation. Specifically, disassociates from the terminal.
However, this does not change the current working directory to "/", as normal daemons do. It also does not close all open file descriptors (except STDIN, STDOUT and STDERR, which are re-opened from /dev/null).
In server mode the application runs as a standalone server and accepts connections from a web server. The application can be on the same machine as the web server, on a remote machine, or even on multiple remote machines. Advantages of this method include running the Catalyst application as a different user than the web server, and the ability to set up a scalable server farm.
To start your application in server mode, install the FCGI::ProcManager module and then use the included fastcgi.pl script.
$ script/myapp_fastcgi.pl -l /tmp/myapp.socket -n 5
Command line options for fastcgi.pl include:
-d -daemon Daemonize the server. -p -pidfile Write a pidfile with the pid of the process manager. -l -listen Listen on a socket path, hostname:port, or :port. -n -nproc The number of processes started to handle requests.
See below for the specific web server configurations for using the external server.
Apache requires the mod_fastcgi module. The same module supports both Apache 1 and 2.
There are three ways to run your application under FastCGI on Apache: server, static, and dynamic.
FastCgiExternalServer /tmp/myapp.fcgi -socket /tmp/myapp.socket Alias /myapp/ /tmp/myapp/myapp.fcgi/ # Or, run at the root Alias / /tmp/myapp.fcgi/ # Optionally, rewrite the path when accessed without a trailing slash RewriteRule ^/myapp$ myapp/ [R]
The FastCgiExternalServer directive tells Apache that when serving /tmp/myapp to use the FastCGI application listenting on the socket /tmp/mapp.socket. Note that /tmp/myapp.fcgi does not need to exist -- it's a virtual file name. With some versions of
mod_fcgid, you can use any name you like, but most require that the virtual filename end in
It's likely that Apache is not configured to serve files in /tmp, so the Alias directive maps the url path /myapp/ to the (virtual) file that runs the FastCGI application. The trailing slashes are important as their use will correctly set the PATH_INFO environment variable used by Catalyst to determine the request path. If you would like to be able to access your app without a trailing slash (http://server/myapp), you can use the above RewriteRule directive.
The term 'static' is misleading, but in static mode Apache uses its own FastCGI Process Manager to start the application processes. This happens at Apache startup time. In this case you do not run your application's fastcgi.pl script -- that is done by Apache. Apache then maps URIs to the FastCGI script to run your application.
FastCgiServer /path/to/myapp/script/myapp_fastcgi.pl -processes 3 Alias /myapp/ /path/to/myapp/script/myapp_fastcgi.pl/
FastCgiServer tells Apache to start three processes of your application at startup. The Alias command maps a path to the FastCGI application. Again, the trailing slashes are important.
In FastCGI dynamic mode, Apache will run your application on demand, typically by requesting a file with a specific extension (e.g. .fcgi). ISPs often use this type of setup to provide FastCGI support to many customers.
In this mode it is often enough to place or link your *_fastcgi.pl script in your cgi-bin directory with the extension of .fcgi. In dynamic mode Apache must be able to run your application as a CGI script so ExecCGI must be enabled for the directory.
AddHandler fastcgi-script .fcgi
The above tells Apache to run any .fcgi file as a FastCGI application.
Here is a complete example:
<VirtualHost *:80> ServerName www.myapp.com DocumentRoot /path/to/MyApp # Allow CGI script to run <Directory /path/to/MyApp> Options +ExecCGI </Directory> # Tell Apache this is a FastCGI application <Files myapp_fastcgi.pl> SetHandler fastcgi-script </Files> </VirtualHost>
Then a request for /script/myapp_fastcgi.pl will run the application.
For more information on using FastCGI under Apache, visit http://www.fastcgi.com/mod_fastcgi/docs/mod_fastcgi.html
These configurations were tested with Lighttpd 1.4.7.
server.document-root = "/var/www/MyApp/root" fastcgi.server = ( "" => ( "MyApp" => ( "socket" => "/tmp/myapp.socket", "check-local" => "disable" ) ) )
server.document-root = "/var/www/MyApp/root" fastcgi.server = ( "" => ( "MyApp" => ( "socket" => "/tmp/myapp.socket", "check-local" => "disable", "bin-path" => "/var/www/MyApp/script/myapp_fastcgi.pl", "min-procs" => 2, "max-procs" => 5, "idle-timeout" => 20 ) ) )
Note that in newer versions of lighttpd, the min-procs and idle-timeout values are disabled. The above example would start 5 processes.
You can also run your application at any non-root location with either of the above modes.
fastcgi.server = ( "/myapp" => ( "MyApp" => ( # same as above ) ) )
For more information on using FastCGI under Lighttpd, visit http://www.lighttpd.net/documentation/fastcgi.html
It is possible to run Catalyst under IIS with FastCGI, but we do not yet have detailed instructions.
Sebastian Riedel, <firstname.lastname@example.org>
Christian Hansen, <email@example.com>
Andy Grundman, <firstname.lastname@example.org>
Bill Moseley, for documentation updates and testing.
This program is free software, you can redistribute it and/or modify it under the same terms as Perl itself.