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Daemon.pm
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Daemon.pm
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package Mojo::Server::Daemon;
use Mojo::Base 'Mojo::Server';
use Carp 'croak';
use Mojo::IOLoop;
use Mojo::URL;
use POSIX;
use Scalar::Util 'weaken';
use constant DEBUG => $ENV{MOJO_DAEMON_DEBUG} || 0;
has [qw(backlog group silent user)];
has inactivity_timeout => sub { $ENV{MOJO_INACTIVITY_TIMEOUT} // 15 };
has ioloop => sub { Mojo::IOLoop->singleton };
has listen => sub { [split /,/, $ENV{MOJO_LISTEN} || 'http://*:3000'] };
has max_clients => 1000;
has max_requests => 25;
sub DESTROY {
my $self = shift;
return unless my $loop = $self->ioloop;
$loop->remove($_) for keys %{$self->{connections} || {}};
$loop->remove($_) for @{$self->{listening} || []};
}
# "40 dollars!? This better be the best damn beer ever..
# *drinks beer* You got lucky."
sub run {
my $self = shift;
# Start accepting connections
$self->start;
# Signals
$SIG{INT} = $SIG{TERM} = sub { exit 0 };
# Change user/group and start loop
$self->setuidgid->ioloop->start;
}
sub setuidgid {
my $self = shift;
$self->_group;
$self->_user;
return $self;
}
sub start {
my $self = shift;
$self->_listen($_) for @{$self->listen};
$self->ioloop->max_connections($self->max_clients);
}
sub _build_tx {
my ($self, $id, $c) = @_;
# Build transaction
my $tx = $self->build_tx->connection($id);
# Identify
$tx->res->headers->server('Mojolicious (Perl)');
# Store connection information
my $handle = $self->ioloop->stream($id)->handle;
$tx->local_address($handle->sockhost)->local_port($handle->sockport);
$tx->remote_address($handle->peerhost)->remote_port($handle->peerport);
# TLS
$tx->req->url->base->scheme('https') if $c->{tls};
# Handle upgrades and requests
weaken $self;
$tx->on(
upgrade => sub {
my ($tx, $ws) = @_;
$ws->server_handshake;
$self->{connections}{$id}{ws} = $ws;
}
);
$tx->on(
request => sub {
my $tx = shift;
$self->emit(request => $self->{connections}{$id}{ws} || $tx);
$tx->on(resume => sub { $self->_write($id) });
}
);
# Kept alive if we have more than one request on the connection
$tx->kept_alive(1) if ++$c->{requests} > 1;
return $tx;
}
sub _finish {
my ($self, $id, $tx) = @_;
# Always remove connection for WebSockets
if ($tx->is_websocket) {
$self->_remove($id);
return $self->ioloop->remove($id);
}
# Finish transaction
$tx->server_close;
# Upgrade connection to WebSocket
my $c = $self->{connections}{$id};
if (my $ws = $c->{tx} = delete $c->{ws}) {
# Successful upgrade
if ($ws->res->code eq '101') {
weaken $self;
$ws->on(resume => sub { $self->_write($id) });
}
# Failed upgrade
else {
delete $c->{tx};
$ws->server_close;
}
}
# Close connection if necessary
if ($tx->req->error || !$tx->keep_alive) {
$self->_remove($id);
$self->ioloop->remove($id);
}
# Build new transaction for leftovers
elsif (defined(my $leftovers = $tx->server_leftovers)) {
$tx = $c->{tx} = $self->_build_tx($id, $c);
$tx->server_read($leftovers);
}
}
sub _group {
my $self = shift;
return unless my $group = $self->group;
croak qq{Group "$group" does not exist}
unless defined(my $gid = (getgrnam($group))[2]);
POSIX::setgid($gid) or croak qq{Can't switch to group "$group": $!};
}
sub _listen {
my ($self, $listen) = @_;
# Options
my $url = Mojo::URL->new($listen);
my $query = $url->query;
my $options = {
address => $url->host,
backlog => $self->backlog,
port => $url->port,
tls_ca => scalar $query->param('ca'),
tls_cert => scalar $query->param('cert'),
tls_key => scalar $query->param('key')
};
my $verify = $query->param('verify');
$options->{tls_verify} = hex $verify if defined $verify;
delete $options->{address} if $options->{address} eq '*';
my $tls = $options->{tls} = $url->scheme eq 'https' ? 1 : undef;
# Listen
weaken $self;
my $id = $self->ioloop->server(
$options => sub {
my ($loop, $stream, $id) = @_;
# Add new connection
my $c = $self->{connections}{$id} = {tls => $tls};
warn "-- Accept (@{[$stream->handle->peerhost]})\n" if DEBUG;
# Inactivity timeout
$stream->timeout($self->inactivity_timeout);
# Events
$stream->on(close => sub { $self->_remove($id) });
$stream->on(
error => sub {
$self->app->log->error(pop);
$self->_remove($id);
}
);
$stream->on(read => sub { $self->_read($id => pop) });
$stream->on(timeout =>
sub { $self->app->log->debug('Inactivity timeout.') if $c->{tx} });
}
);
push @{$self->{listening} ||= []}, $id;
# Friendly message
return if $self->silent;
$self->app->log->info(qq{Listening at "$listen".});
$listen =~ s!//\*!//127.0.0.1!i;
say "Server available at $listen.";
}
sub _read {
my ($self, $id, $chunk) = @_;
# Make sure we have a transaction
my $c = $self->{connections}{$id};
my $tx = $c->{tx} ||= $self->_build_tx($id, $c);
# Parse chunk
warn "-- Server <<< Client (@{[$tx->req->url->to_abs]})\n$chunk\n" if DEBUG;
$tx->server_read($chunk);
# Last keep alive request
$tx->res->headers->connection('close')
if ($c->{requests} || 0) >= $self->max_requests;
# Finish or start writing
if ($tx->is_finished) { $self->_finish($id, $tx) }
elsif ($tx->is_writing) { $self->_write($id) }
}
sub _remove {
my ($self, $id) = @_;
# Finish gracefully
if (my $tx = $self->{connections}{$id}{tx}) { $tx->server_close }
# Remove connection
delete $self->{connections}{$id};
}
sub _user {
my $self = shift;
return unless my $user = $self->user;
croak qq{User "$user" does not exist}
unless defined(my $uid = (getpwnam($self->user))[2]);
POSIX::setuid($uid) or croak qq{Can't switch to user "$user": $!};
}
sub _write {
my ($self, $id) = @_;
# Not writing
my $c = $self->{connections}{$id};
return unless my $tx = $c->{tx};
return unless $tx->is_writing;
# Get chunk
return if $c->{writing}++;
my $chunk = $tx->server_write;
delete $c->{writing};
warn "-- Server >>> Client (@{[$tx->req->url->to_abs]})\n$chunk\n" if DEBUG;
# Write chunk
my $stream = $self->ioloop->stream($id);
$stream->write($chunk);
# Finish or continue writing
weaken $self;
my $cb = sub { $self->_write($id) };
if ($tx->is_finished) {
if ($tx->has_subscribers('finish')) {
$cb = sub { $self->_finish($id, $tx) }
}
else {
$self->_finish($id, $tx);
return unless $c->{tx};
}
}
$stream->write('', $cb);
}
1;
=head1 NAME
Mojo::Server::Daemon - Non-blocking I/O HTTP and WebSocket server
=head1 SYNOPSIS
use Mojo::Server::Daemon;
my $daemon = Mojo::Server::Daemon->new(listen => ['http://*:8080']);
$daemon->unsubscribe('request');
$daemon->on(request => sub {
my ($daemon, $tx) = @_;
# Request
my $method = $tx->req->method;
my $path = $tx->req->url->path;
# Response
$tx->res->code(200);
$tx->res->headers->content_type('text/plain');
$tx->res->body("$method request for $path!");
# Resume transaction
$tx->resume;
});
$daemon->run;
=head1 DESCRIPTION
L<Mojo::Server::Daemon> is a full featured non-blocking I/O HTTP and WebSocket
server with C<IPv6>, C<TLS> and C<libev> support.
Optional modules L<EV> (4.0+), L<IO::Socket::IP> (0.16+) and
L<IO::Socket::SSL> (1.75+) are supported transparently and used if installed.
Individual features can also be disabled with the C<MOJO_NO_IPV6> and
C<MOJO_NO_TLS> environment variables.
See L<Mojolicious::Guides::Cookbook> for more.
=head1 EVENTS
L<Mojo::Server::Daemon> inherits all events from L<Mojo::Server>.
=head1 ATTRIBUTES
L<Mojo::Server::Daemon> inherits all attributes from L<Mojo::Server> and
implements the following new ones.
=head2 C<backlog>
my $backlog = $daemon->backlog;
$daemon = $daemon->backlog(128);
Listen backlog size, defaults to C<SOMAXCONN>.
=head2 C<group>
my $group = $daemon->group;
$daemon = $daemon->group('users');
Group for server process.
=head2 C<inactivity_timeout>
my $timeout = $daemon->inactivity_timeout;
$daemon = $daemon->inactivity_timeout(5);
Maximum amount of time in seconds a connection can be inactive before getting
closed, defaults to the value of the C<MOJO_INACTIVITY_TIMEOUT> environment
variable or C<15>. Setting the value to C<0> will allow connections to be
inactive indefinitely.
=head2 C<ioloop>
my $loop = $daemon->ioloop;
$daemon = $daemon->ioloop(Mojo::IOLoop->new);
Loop object to use for I/O operations, defaults to the global L<Mojo::IOLoop>
singleton.
=head2 C<listen>
my $listen = $daemon->listen;
$daemon = $daemon->listen(['https://localhost:3000']);
List of one or more locations to listen on, defaults to the value of the
C<MOJO_LISTEN> environment variable or C<http://*:3000>.
# Listen on IPv6 interface
$daemon->listen(['http://[::1]:4000']);
# Listen on two ports with HTTP and HTTPS at the same time
$daemon->listen([qw(http://*:3000 https://*:4000)]);
# Use a custom certificate and key
$daemon->listen(['https://*:3000?cert=/x/server.crt&key=/y/server.key']);
# Or even a custom certificate authority
$daemon->listen(
['https://*:3000?cert=/x/server.crt&key=/y/server.key&ca=/z/ca.crt']);
These parameters are currently available:
=over 4
=item C<ca>
Path to TLS certificate authority file.
=item C<cert>
Path to the TLS cert file, defaults to a built-in test certificate.
=item C<key>
Path to the TLS key file, defaults to a built-in test key.
=item C<verify>
TLS verification mode, defaults to C<0x03>.
=back
=head2 C<max_clients>
my $max_clients = $daemon->max_clients;
$daemon = $daemon->max_clients(1000);
Maximum number of parallel client connections, defaults to C<1000>.
=head2 C<max_requests>
my $max_requests = $daemon->max_requests;
$daemon = $daemon->max_requests(100);
Maximum number of keep alive requests per connection, defaults to C<25>.
=head2 C<silent>
my $silent = $daemon->silent;
$daemon = $daemon->silent(1);
Disable console messages.
=head2 C<user>
my $user = $daemon->user;
$daemon = $daemon->user('web');
User for the server process.
=head1 METHODS
L<Mojo::Server::Daemon> inherits all methods from L<Mojo::Server> and
implements the following new ones.
=head2 C<run>
$daemon->run;
Run server.
=head2 C<setuidgid>
$daemon = $daemon->setuidgid;
Set user and group for process.
=head2 C<start>
$daemon->start;
Start accepting connections.
=head1 DEBUGGING
You can set the C<MOJO_DAEMON_DEBUG> environment variable to get some advanced
diagnostics information printed to C<STDERR>.
MOJO_DAEMON_DEBUG=1
=head1 SEE ALSO
L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>.
=cut