/usr/share/perl5/Mojo/IOLoop/Client.pm is in libmojolicious-perl 5.54+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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use Mojo::Base 'Mojo::EventEmitter';
use Errno 'EINPROGRESS';
use IO::Socket::INET;
use Mojo::IOLoop;
use Scalar::Util 'weaken';
use Socket qw(IPPROTO_TCP SO_ERROR TCP_NODELAY);
# IPv6 support requires IO::Socket::IP
use constant IPV6 => $ENV{MOJO_NO_IPV6}
? 0
: eval 'use IO::Socket::IP 0.20 (); 1';
# TLS support requires IO::Socket::SSL
use constant TLS => $ENV{MOJO_NO_TLS}
? 0
: eval 'use IO::Socket::SSL 1.84 (); 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;
# SOCKS support requires IO::Socket::Socks
use constant SOCKS => $ENV{MOJO_NO_SOCKS}
? 0
: eval 'use IO::Socket::Socks 0.64 (); 1';
use constant SOCKS_READ => SOCKS ? IO::Socket::Socks::SOCKS_WANT_READ() : 0;
use constant SOCKS_WRITE => SOCKS ? IO::Socket::Socks::SOCKS_WANT_WRITE() : 0;
has reactor => sub { Mojo::IOLoop->singleton->reactor };
sub DESTROY { shift->_cleanup }
sub connect {
my $self = shift;
my $args = ref $_[0] ? $_[0] : {@_};
weaken $self;
$self->reactor->next_tick(sub { $self && $self->_connect($args) });
}
sub _cleanup {
my $self = shift;
return $self unless my $reactor = $self->reactor;
$self->{$_} && $reactor->remove(delete $self->{$_}) for qw(timer handle);
return $self;
}
sub _connect {
my ($self, $args) = @_;
my $handle;
my $reactor = $self->reactor;
my $address = $args->{socks_address} || ($args->{address} ||= 'localhost');
my $port = $args->{socks_port} || $args->{port} || ($args->{tls} ? 443 : 80);
unless ($handle = $self->{handle} = $args->{handle}) {
my %options = (
Blocking => 0,
PeerAddr => $address eq 'localhost' ? '127.0.0.1' : $address,
PeerPort => $port
);
$options{LocalAddr} = $args->{local_address} if $args->{local_address};
$options{PeerAddr} =~ s/[\[\]]//g if $options{PeerAddr};
my $class = IPV6 ? 'IO::Socket::IP' : 'IO::Socket::INET';
return $self->emit(error => "Can't connect: $@")
unless $self->{handle} = $handle = $class->new(%options);
}
$handle->blocking(0);
# Timeout
$self->{timer} = $reactor->timer($args->{timeout} || 10,
sub { $self->emit(error => 'Connect timeout') });
# Wait for handle to become writable
weaken $self;
$reactor->io($handle => sub { $self->_ready($args) })->watch($handle, 0, 1);
}
sub _ready {
my ($self, $args) = @_;
# Retry or handle exceptions
my $handle = $self->{handle};
return $! == EINPROGRESS ? undef : $self->emit(error => $!)
if $handle->isa('IO::Socket::IP') && !$handle->connect;
return $self->emit(error => $! = $handle->sockopt(SO_ERROR))
unless $handle->connected;
# Disable Nagle's algorithm
setsockopt $handle, IPPROTO_TCP, TCP_NODELAY, 1;
$self->_try_socks($args);
}
sub _socks {
my ($self, $args) = @_;
# Connected
my $handle = $self->{handle};
return $self->_try_tls($args) if $handle->ready;
# Switch between reading and writing
my $err = $IO::Socket::Socks::SOCKS_ERROR;
if ($err == SOCKS_READ) { $self->reactor->watch($handle, 1, 0) }
elsif ($err == SOCKS_WRITE) { $self->reactor->watch($handle, 1, 1) }
else { $self->emit(error => $err) }
}
sub _tls {
my $self = shift;
# Connected
my $handle = $self->{handle};
return $self->_cleanup->emit(connect => $handle) if $handle->connect_SSL;
# Switch between reading and writing
my $err = $IO::Socket::SSL::SSL_ERROR;
if ($err == TLS_READ) { $self->reactor->watch($handle, 1, 0) }
elsif ($err == TLS_WRITE) { $self->reactor->watch($handle, 1, 1) }
}
sub _try_socks {
my ($self, $args) = @_;
my $handle = $self->{handle};
return $self->_try_tls($args) unless $args->{socks_address};
return $self->emit(
error => 'IO::Socket::Socks 0.64 required for SOCKS support')
unless SOCKS;
my %options
= (ConnectAddr => $args->{address}, ConnectPort => $args->{port});
@options{qw(AuthType Username Password)}
= ('userpass', @$args{qw(socks_user socks_pass)})
if $args->{socks_user};
my $reactor = $self->reactor;
$reactor->remove($handle);
return $self->emit(error => 'SOCKS upgrade failed')
unless IO::Socket::Socks->start_SOCKS($handle, %options);
weaken $self;
$reactor->io($handle => sub { $self->_socks($args) })->watch($handle, 0, 1);
}
sub _try_tls {
my ($self, $args) = @_;
my $handle = $self->{handle};
return $self->_cleanup->emit(connect => $handle)
if !$args->{tls} || $handle->isa('IO::Socket::SSL');
return $self->emit(error => 'IO::Socket::SSL 1.84 required for TLS support')
unless TLS;
# Upgrade
weaken $self;
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->emit(error => $_[1]) },
SSL_hostname => IO::Socket::SSL->can_client_sni ? $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
);
my $reactor = $self->reactor;
$reactor->remove($handle);
return $self->emit(error => 'TLS upgrade failed')
unless IO::Socket::SSL->start_SSL($handle, %options);
$reactor->io($handle => sub { $self->_tls })->watch($handle, 0, 1);
}
1;
=encoding utf8
=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 => 'example.com', port => 80);
# Start reactor if necessary
$client->reactor->start unless $client->reactor->is_running;
=head1 DESCRIPTION
L<Mojo::IOLoop::Client> opens TCP connections for L<Mojo::IOLoop>.
=head1 EVENTS
L<Mojo::IOLoop::Client> inherits all events from L<Mojo::EventEmitter> and can
emit the following new ones.
=head2 connect
$client->on(connect => sub {
my ($client, $handle) = @_;
...
});
Emitted once the connection is established.
=head2 error
$client->on(error => sub {
my ($client, $err) = @_;
...
});
Emitted if an error occurs on the connection, fatal if unhandled.
=head1 ATTRIBUTES
L<Mojo::IOLoop::Client> implements the following attributes.
=head2 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 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> (1.84+) and IPv6 support on L<IO::Socket::IP> (0.20+).
These options are currently available:
=over 2
=item address
address => 'mojolicio.us'
Address or host name of the peer to connect to, defaults to C<localhost>.
=item handle
handle => $handle
Use an already prepared handle.
=item local_address
local_address => '127.0.0.1'
Local address to bind to.
=item port
port => 80
Port to connect to, defaults to C<80> or C<443> with C<tls> option.
=item socks_address
socks_address => '127.0.0.1'
Address or host name of SOCKS5 proxy server to use for connection.
=item socks_pass
socks_pass => 'secr3t'
Password to use for SOCKS5 authentication.
=item socks_port
socks_port => 9050
Port of SOCKS5 proxy server to use for connection.
=item socks_user
socks_user => 'sri'
Username to use for SOCKS5 authentication.
=item timeout
timeout => 15
Maximum amount of time in seconds establishing connection may take before
getting canceled, defaults to C<10>.
=item tls
tls => 1
Enable TLS.
=item tls_ca
tls_ca => '/etc/tls/ca.crt'
Path to TLS certificate authority file. Also activates hostname verification.
=item tls_cert
tls_cert => '/etc/tls/client.crt'
Path to the TLS certificate file.
=item tls_key
tls_key => '/etc/tls/client.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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