Net::Server::PSGI(3pm)User Contributed Perl DocumentatioNet::Server::PSGI(3pm)
NAME
Net::Server::PSGI - basic Net::Server based PSGI HTTP server class
TEST ONE LINER
perl -e 'use base qw(Net::Server::PSGI); main->run(port => 8080, ipv => "*")'
# runs a default echo server
SYNOPSIS
use base qw(Net::Server::PSGI);
__PACKAGE__->run(app => \&my_echo_handler); # will bind IPv4 port 80
sub my_echo_handler {
my $env = shift;
my $txt = qq{<form method="post" action="/bam"><input type="text" name="foo"><input type="submit"></form>\n};
require Data::Dumper;
local $Data::Dumper::Sortkeys = 1;
require CGI::PSGI;
my $form = {};
my $q = CGI::PSGI->new($env);
$form->{$_} = $q->param($_) for $q->param;
$txt .= "<pre>".Data::Dumper->Dump([$env, $form], ['env', 'form'])."</pre>";
return [200, ['Content-type', 'text/html'], [$txt]];
}
DESCRIPTION
If you want a more fully featured PSGI experience, it would be wise to
look at the Plack and Starman set of modules. Net::Server::PSGI is
intended as an easy gateway into PSGI. But to get the most out of all
that PSGI has to offer, you should review the Plack and
Plack::Middleware. If you only need something a little more
rudimentary, then Net::Server::PSGI may be good for you.
Net::Server::PSGI takes Net::Server::HTTP one level farther. It begins
with base type MultiType defaulting to Net::Server::Fork. It is easy
to change it to any of the other Net::Server flavors by passing
server_type => $other_flavor in the server configuration. The port has
also been defaulted to port 80 - but could easily be changed to another
through the server configuration. You can also very easily add ssl by
including, proto=>"ssl" and provide a SSL_cert_file and SSL_key_file.
For example, here is a basic server that will bind to all interfaces,
will speak both HTTP on port 8080 as well as HTTPS on 8443, and will
speak both IPv4, as well as IPv6 if it is available.
use base qw(Net::Server::PSGI);
__PACKAGE__->run(
port => [8080, "8443/ssl"],
ipv => '*', # IPv6 if available
SSL_key_file => '/my/key',
SSL_cert_file => '/my/cert',
);
METHODS
"process_request"
This method has been overridden in Net::Server::PSGI - you should
not use it while using Net::Server::PSGI. This overridden method
parses the environment and sets up request alarms and handles dying
failures. It calls process_psgi_request once the request is ready
and headers have been parsed.
"process_psgi_request"
Used when psgi_enabled is true. During this method,
find_psgi_handler will be called to return the appropriate psgi
response handler. Once finished, print_psgi_headers and
print_psgi_body are used to print out the response. See PSGI.
Typically this method should not be overridden. Instead, an
appropriate method for finding the app should be given to
find_psgi_handler or app.
"find_psgi_handler"
Used to lookup the appropriate PSGI handler. A reference to the
already parsed $env hashref is passed. PATH_INFO will be
initialized to the full path portion of the URI. SCRIPT_NAME will
be initialized to the empty string. This handler should set the
appropriate values for SCRIPT_NAME and PATH_INFO depending upon the
path matched. A code reference for the handler should be returned.
The default find_psgi_handler will call the "app" method. If that
fails a reference to the psgi_echo_handler is returned as the
default application.
sub find_psgi_handler {
my ($self, $env) = @_;
if ($env->{'PATH_INFO'} && $env->{'PATH_INFO'} =~ s{^ (/foo) (?= $ | /) }{}x) {
$env->{'SCRIPT_NAME'} = $1;
return \&foo_app;
}
return $self->SUPER::find_psgi_handler($env);
}
"app"
Return a reference to the application being served. This should be
a valid PSGI application. See PSGI. By default it will look at
the value of the "app" configuration option. The "app" method may
also be used to set the "app" configuration option.
package MyApp;
use base qw(Net::Server::PSGI);
sub default_server_type { 'Prefork' }
sub my_app {
my $env = shift;
return [200, ['Content-type', 'text/html'], ["Hello world"]];
}
MyApp->run(app => \&my_app);
# OR
sub app { \&my_app }
MyApp->run;
# OR
my $server = MyApp->new;
$server->app(\&my_app);
$server->run;
OPTIONS
In addition to the command line arguments of the Net::Server::HTTP base
classes you can also set the following options.
app Should return a coderef of the PSGI application. Is returned by
the app method.
AUTHOR
Paul T. Seamons paul@seamons.com
SEE ALSO
Please see also Plack, Starman,
Net::Server::Fork, Net::Server::INET, Net::Server::PreFork,
Net::Server::PreForkSimple, Net::Server::MultiType, Net::Server::Single
Net::Server::SIG Net::Server::Daemonize Net::Server::Proto
Net::Server::HTTP
perl v5.30.0 2020-04-03 Net::Server::PSGI(3pm)
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