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  $client->on(error => sub ($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/IP and UNIX domain socket 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

  $client->on(connect => sub ($client, $handle) {...});

Emitted once the connection is established.

=head2 error

  $client->on(error => sub ($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. Note that
this attribute is weakened.

=head1 METHODS

L<Mojo::IOLoop::Client> inherits all methods from L<Mojo::EventEmitter> and implements the following new ones.

=head2 can_nnr

  my $bool = Mojo::IOLoop::Client->can_nnr;

True if L<Net::DNS::Native> 0.15+ is installed and non-blocking name resolution support enabled.

=head2 can_socks

  my $bool = Mojo::IOLoop::Client->can_socks;

True if L<IO::Socket::SOCKS> 0.64+ is installed and SOCKS5 support enabled.

=head2 connect

  $client->connect(address => '127.0.0.1', port => 3000);
  $client->connect({address => '127.0.0.1', port => 3000});

Open a socket connection to a remote host. Note that non-blocking name resolution depends on L<Net::DNS::Native>
(0.15+), SOCKS5 support on L<IO::Socket::Socks> (0.64), and TLS support on L<IO::Socket::SSL> (2.009+).

These options are currently available:

=over 2

=item address

  address => 'mojolicious.org'

Address or host name of the peer to connect to, defaults to C<127.0.0.1>.

=item handle

  handle => $handle

Use an already prepared L<IO::Socket::IP> object.

=item path

  path => '/tmp/myapp.sock'

Path of UNIX domain socket to connect to.

=item port

  port => 80

Port to connect to, defaults to C<80> or C<443> with C<tls> option.

=item socket_options

  socket_options => {LocalAddr => '127.0.0.1'}

Additional options for L<IO::Socket::IP> when opening new connections.

=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.

=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.

=item tls_options

  tls_options => {SSL_alpn_protocols => ['foo', 'bar'], SSL_verify_mode => 0x00}

Additional options for L<IO::Socket::SSL>.

=back

=head1 SEE ALSO

L<Mojolicious>, L<Mojolicious::Guides>, L<https://mojolicious.org>.

=cut