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SCGI - A SCGI library for Raku


This is a simple SCGI library for Raku.

It's main influences are the Perl SCGI library, and the Raku HTTP::Daemon library.

It offers a bit of candy coating compared to the Perl version.

By default is uses a PSGI-compliant interface, but can also handle raw HTTP responses.

You don't need to create your own IO::Socket::INET object. Just pass an 'addr' and 'port' attribute to the new() declaration and it'll create the object for you.


The simplest (and recommended) form of usage is to use the handle() method with PSGI-compliant output. Here's an example:

use SCGI;

my $scgi = SCGI.new( :port(8118) );

sub handler(%env) {
    my $name    = %env<QUERY_STRING> || 'world';
    my $status  = '200';
    my @headers = 'Content-Type' => 'text/plain';
    my @body    = "Hello $name\n";
    @headers.push: 'Content-Length' => @body.join.encode.bytes;
    [ $status, @headers, @body ]

$scgi.handle: &handler;

There are other ways of using SCGI, such as writing your own run loop, or using a raw HTTP output instead of PSGI. Here's an example doing both:

use SCGI;

my $scgi = SCGI.new( :port(8118), :!PSGI, :!P6SGI );
while my $connection = $scgi.accept() {
    my $request = $connection.request;
    if $request.success {
        my $name    = $request.env<QUERY_STRING> || 'world';
        my $return  = "Hello $name\n";
        my $len     = $return.encode.bytes;
        my $headers = "Content-Type: text/plain\nContent-Length: $len\n";

Test script representing both examples can be found in the 'examples' folder.

If you are serious about using SCGI for web application development, see the Web library set, or one of the full blown frameworks built using it.



Make sure you compiled nginx with the SCGI plugin (it is included by default.) Then, in one of your server blocks, add a location mount:

location /scgi/ {
    include scgi_params;
    # Optionally rewrite document URI path
    rewrite ^/scgi/(.*) /$1 break;
    # Some applications may need rewritten URI in PATH_INFO
    scgi_param PATH_INFO $uri;


First, make sure the SCGI library is being loaded.

server.modules += ( "mod_scgi" )

Next, set up an SCGI handler:

scgi.server = (
    "/scgi" =>
      "host" => "",
      "port" => 8118,
      "check-local" => "disable"

Apache 2 with mod_scgi:

Add the following line to your site config, changing the details to match your SCGI script configuration:

SCGIMount /scgi/

Apache 2 with mod_proxy_scgi:

Add the following line to your site config, changes the details to match your SCGI script configuration:

<Proxy *>
    Order deny,allow
    Allow from all
ProxyPass /scgi/ scgi://localhost:8118/


Timothy Totten


Copyright 2013 - 2017 Timothy Totten

Copyright 2018 - 2022 Raku Community

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.