NAME
starlight - a light and pure-Perl PSGI/Plack HTTP server with pre-forks
SYNOPSIS
$ starlight --max-workers=20 --max-reqs-per-child=100 app.psgi
$ starlight --port=80 --ipv6=1 app.psgi
$ starlight --port=443 --ssl=1 --ssl-key-file=file.key
--ssl-cert-file=file.crt app.psgi
$ starlight --socket=/tmp/starlight.sock app.psgiDESCRIPTION
Starlight is a standalone HTTP/1.1 server with keep-alive support. It uses pre-forking. It is pure-Perl implementation which doesn't require any XS package.
Starlight was started as a fork of Thrall server which is a fork of Starlet server. It has almost the same code as Thrall and Starlet and it was adapted to not use any other modules than Plack.
Starlight is created for Unix-like systems but it should also work on Windows with some limitations.
OPTIONS
In addition to the options supported by plackup, starlight accepts following options(s).
--max-workers
Number of worker processes. (default: 10)
--timeout
Seconds until timeout. (default: 300)
--keepalive-timeout
Timeout for persistent connections. (default: 2)
--max-keepalive-reqs
Max. number of requests allowed per single persistent connection. If set to one, persistent connections are disabled. (default: 1)
--max-reqs-per-child
Max. number of requests to be handled before a worker process exits. (default: 1000)
--min-reqs-per-child
If set, randomizes the number of requests handled by a single worker process between the value and that supplied by --max-reqs-per-chlid. (default: none)
--spawn-interval
If set, worker processes will not be spawned more than once than every given seconds. Also, when SIGHUP is being received, no more than one worker processes will be collected every given seconds. This feature is useful for doing a "slow-restart". (default: none)
--main-process-delay
The Starlight does not synchronize its processes and it requires a small delay in main process so it doesn't consume all CPU. (default: 0.1)
--ssl
Enables SSL support. The IO::Socket::SSL module is required. (default: 0)
--ssl-key-file
Specifies the path to SSL key file. (default: none)
--ssl-cert-file
Specifies the path to SSL certificate file. (default: none)
--ssl-ca-file
Specifies the path to SSL CA certificate file used when verification mode is enabled. (default: none)
--ssl-verify-mode
Sets the verification mode for the peer certificate. See "SSL_verify_mode" in IO::Socket::SSL. (default: 0)
--ipv6
Enables IPv6 support. The IO::Socket::IP module is required. (default: 0)
--socket
Enables UNIX socket support. The IO::Socket::UNIX module is required. The socket file have to be not yet created. The first character @ or \0 in the socket file name means that abstract socket address will be created. (default: none)
--user
Changes the user id or user name that the server process should switch to after binding to the port. The pid file, error log or unix socket also are created before changing privileges. This options is usually used if main process is started with root privileges beacause binding to the low-numbered (<1024) port. (default: none)
--group
Changes the group ids or group names that the server should switch to after binding to the port. The ids or names can be separated with comma or space character. (default: none)
--umask
Changes file mode creation mask. The "umask" in perlfunc is an octal number representing disabled permissions bits for newly created files. It is usually 022 when group shouldn't have permission to write or 002 when group should have permission to write. (default: none)
--daemonize
Makes the process run in the background. It doesn't work (yet) in native Windows (MSWin32). (default: 0)
--pid
Specify the pid file path. Use it with -D|--daemonize option. (default: none)
--error-log
Specify the pathname of a file where the error log should be written. This enables you to still have access to the errors when using --daemonize. (default: none)
-q, --quiet
Suppress the message about starting a server.
SEE ALSO
Starlight, Thrall, Starlet, Starman
LIMITATIONS
Perl on Windows systems (MSWin32 and cygwin) emulates "fork" in perlfunc and "waitpid" in perlfunc functions and uses threads internally. See perlfork (MSWin32) and perlcygwin (cygwin) for details and limitations.
It might be better option to use on this system the server with explicit threads implementation, i.e. Thrall.
For Cygwin the perl-libwin32 package is highly recommended, because of Win32::Process module which helps to terminate stalled worker processes.
BUGS
Windows
There is a problem with Perl threads implementation which occurs on Windows systems (MSWin32). Cygwin version seems to be correct.
Some requests can fail with message:
failed to set socket to nonblocking mode:An operation was attempted on something that is not a socket.
or
Bad file descriptor at (eval 24) line 4.
This problem was introduced in Perl 5.16 and fixed in Perl 5.19.5.
See https://rt.perl.org/rt3/Public/Bug/Display.html?id=119003 and https://github.com/dex4er/Thrall/issues/5 for more information about this issue.
The server fails when worker process calls "exit" in perlfunc function:
Attempt to free unreferenced scalar: SV 0x293a76c, Perl interpreter: 0x22dcc0c at lib/Plack/Handler/Starlight.pm line 140.
It means that Harakiri mode can't work and the server have to be started with --max-reqs-per-child=inf option.
See https://rt.perl.org/Public/Bug/Display.html?id=40565 and https://github.com/dex4er/Starlight/issues/1 for more information about this issue.
Reporting
If you find the bug or want to implement new features, please report it at https://github.com/dex4er/Starlight/issues
The code repository is available at http://github.com/dex4er/Starlight
AUTHORS
Piotr Roszatycki <dexter@cpan.org>
Based on Thrall by:
Piotr Roszatycki <dexter@cpan.org>
Based on Starlet by:
Kazuho Oku
miyagawa
kazeburo
Some code based on Plack:
Tatsuhiko Miyagawa
Some code based on Net::Server::Daemonize:
Jeremy Howard <j+daemonize@howard.fm>
Paul Seamons <paul@seamons.com>
LICENSE
Copyright (c) 2013-2016, 2020, 2023 Piotr Roszatycki <dexter@cpan.org>.
This is free software; you can redistribute it and/or modify it under the same terms as perl itself.