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package Mojo::IOLoop::Client;
use Mojo::Base 'Mojo::EventEmitter';
use IO::Socket::INET;
use Scalar::Util 'weaken';
use Socket qw(IPPROTO_TCP SO_ERROR TCP_NODELAY);
# IPv6 support requires IO::Socket::INET6
use constant IPV6 => $ENV{MOJO_NO_IPV6}
? 0
: eval 'use IO::Socket::INET6 2.69 (); 1';
# TLS support requires IO::Socket::SSL
use constant TLS => $ENV{MOJO_NO_TLS} ? 0
: eval(IPV6 ? 'use IO::Socket::SSL 1.37 (); 1'
: 'use IO::Socket::SSL 1.37 "inet4"; 1');
use constant TLS_READ => TLS ? IO::Socket::SSL::SSL_WANT_READ() : 0;
use constant TLS_WRITE => TLS ? IO::Socket::SSL::SSL_WANT_WRITE() : 0;
# "It's like my dad always said: eventually, everybody gets shot."
has reactor => sub {
require Mojo::IOLoop;
Mojo::IOLoop->singleton->reactor;
};
sub DESTROY { shift->_cleanup }
# "I wonder where Bart is, his dinner's getting all cold... and eaten."
sub connect {
my $self = shift;
my $args = ref $_[0] ? $_[0] : {@_};
weaken $self;
$self->{delay} = $self->reactor->timer(0 => sub { $self->_connect($args) });
}
sub _cleanup {
my $self = shift;
return unless my $reactor = $self->{reactor};
$reactor->remove(delete $self->{delay}) if $self->{delay};
$reactor->remove(delete $self->{timer}) if $self->{timer};
$reactor->remove(delete $self->{handle}) if $self->{handle};
}
sub _connect {
my ($self, $args) = @_;
# New socket
my $handle;
my $reactor = $self->reactor;
my $address = $args->{address} ||= 'localhost';
unless ($handle = $args->{handle}) {
my %options = (
Blocking => 0,
PeerAddr => $address eq 'localhost' ? '127.0.0.1' : $address,
PeerPort => $args->{port} || ($args->{tls} ? 443 : 80),
Proto => 'tcp'
);
$options{LocalAddr} = $args->{local_address} if $args->{local_address};
$options{PeerAddr} =~ s/[\[\]]//g if $options{PeerAddr};
my $class = IPV6 ? 'IO::Socket::INET6' : 'IO::Socket::INET';
return $self->emit_safe(error => "Couldn't connect.")
unless $handle = $class->new(%options);
# Timer
$self->{timer} = $reactor->timer($args->{timeout} || 10,
sub { $self->emit_safe(error => 'Connect timeout.') });
}
$handle->blocking(0);
# Disable Nagle's algorithm
setsockopt $handle, IPPROTO_TCP, TCP_NODELAY, 1;
# TLS
weaken $self;
if ($args->{tls} && !$handle->isa('IO::Socket::SSL')) {
# No TLS support
return $self->emit_safe(
error => 'IO::Socket::SSL 1.37 required for TLS support.')
unless TLS;
# Upgrade
my %options = (
SSL_ca_file => $args->{tls_ca}
&& -T $args->{tls_ca} ? $args->{tls_ca} : undef,
SSL_cert_file => $args->{tls_cert},
SSL_error_trap => sub {
$self->_cleanup;
$self->emit_safe(error => $_[1]);
},
SSL_hostname => $args->{address},
SSL_key_file => $args->{tls_key},
SSL_startHandshake => 0,
SSL_verify_mode => $args->{tls_ca} ? 0x01 : 0x00,
SSL_verifycn_name => $args->{address},
SSL_verifycn_scheme => $args->{tls_ca} ? 'http' : undef
);
$self->{tls} = 1;
return $self->emit_safe(error => 'TLS upgrade failed.')
unless $handle = IO::Socket::SSL->start_SSL($handle, %options);
}
# Wait for handle to become writable
$self->{handle} = $handle;
$reactor->io($handle => sub { $self->_connecting })->watch($handle, 0, 1);
}
# "Have you ever seen that Blue Man Group? Total ripoff of the Smurfs.
# And the Smurfs, well, they SUCK."
sub _connecting {
my $self = shift;
# Switch between reading and writing
my $handle = $self->{handle};
my $reactor = $self->reactor;
if ($self->{tls} && !$handle->connect_SSL) {
my $err = $IO::Socket::SSL::SSL_ERROR;
if ($err == TLS_READ) { $reactor->watch($handle, 1, 0) }
elsif ($err == TLS_WRITE) { $reactor->watch($handle, 1, 1) }
return;
}
# Check for errors
return $self->emit_safe(error => $! = $handle->sockopt(SO_ERROR))
unless $handle->connected;
# Connected
$self->_cleanup;
$self->emit_safe(connect => $handle);
}
1;
=head1 NAME
Mojo::IOLoop::Client - Non-blocking TCP client
=head1 SYNOPSIS
use Mojo::IOLoop::Client;
# Create socket connection
my $client = Mojo::IOLoop::Client->new;
$client->on(connect => sub {
my ($client, $handle) = @_;
...
});
$client->on(error => sub {
my ($client, $err) = @_;
...
});
$client->connect(address => 'mojolicio.us', port => 80);
=head1 DESCRIPTION
L<Mojo::IOLoop::Client> opens TCP connections for L<Mojo::IOLoop>.
=head1 EVENTS
L<Mojo::IOLoop::Client> can emit the following events.
=head2 C<connect>
$client->on(connect => sub {
my ($client, $handle) = @_;
...
});
Emitted safely once the connection is established.
=head2 C<error>
$client->on(error => sub {
my ($client, $err) = @_;
...
});
Emitted safely if an error happens on the connection.
=head1 ATTRIBUTES
L<Mojo::IOLoop::Client> implements the following attributes.
=head2 C<reactor>
my $reactor = $client->reactor;
$client = $client->reactor(Mojo::Reactor::Poll->new);
Low level event reactor, defaults to the C<reactor> attribute value of the
global L<Mojo::IOLoop> singleton.
=head1 METHODS
L<Mojo::IOLoop::Client> inherits all methods from L<Mojo::EventEmitter> and
implements the following new ones.
=head2 C<connect>
$client->connect(address => '127.0.0.1', port => 3000);
Open a socket connection to a remote host. Note that TLS support depends on
L<IO::Socket::SSL> and IPv6 support on L<IO::Socket::INET6>.
These options are currently available:
=over 2
=item C<address>
Address or host name of the peer to connect to, defaults to C<localhost>.
=item C<handle>
Use an already prepared handle.
=item C<local_address>
Local address to bind to.
=item C<port>
Port to connect to.
=item C<timeout>
Maximum amount of time in seconds establishing connection may take before
getting canceled, defaults to C<10>.
=item C<tls>
Enable TLS.
=item C<tls_ca>
Path to TLS certificate authority file. Also activates hostname verification.
=item C<tls_cert>
Path to the TLS certificate file.
=item C<tls_key>
Path to the TLS key file.
=back
=head1 SEE ALSO
L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>.
=cut
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