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|
package IO::Stream::EV;
use 5.010001;
use warnings;
use strict;
use utf8;
use Carp;
our $VERSION = 'v2.0.3';
use IO::Stream::const;
use Scalar::Util qw( weaken );
use Socket qw( inet_aton sockaddr_in );
use EV;
use AnyEvent::DNS;
# States:
use constant RESOLVING => 1;
use constant CONNECTING => 2;
use constant HANDLING => 3;
sub new {
my $self = bless {
fh => undef,
_state => 0, # RESOLVING -> CONNECTING -> HANDLING
_r => undef, # read watcher
_w => undef, # write watcher
_t => undef, # timer watcher
_cb_r => undef, # read callback
_cb_w => undef, # write callback
_cb_t => undef, # timer callback
}, __PACKAGE__;
my $this = $self;
weaken($this);
$self->{_cb_t} = sub { $this->T() };
$self->{_cb_r} = sub { $this->R() };
$self->{_cb_w} = sub { $this->W() };
return $self;
}
sub PREPARE {
my ($self, $fh, $host, $port) = @_;
$self->{fh} = $fh;
if (!defined $host) {
$self->{_state} = HANDLING;
$self->{_r} = EV::io($fh, EV::READ, $self->{_cb_r});
}
else {
$self->{_state} = RESOLVING;
_resolve($host, $self, sub {
my ($self, $ip) = @_;
$self->{_state} = CONNECTING;
# TODO try other ip on failed connect?
connect $self->{fh}, sockaddr_in($port, inet_aton($ip));
$self->{_r} = EV::io($fh, EV::READ, $self->{_cb_r});
$self->{_w} = EV::io($fh, EV::WRITE, $self->{_cb_w});
$self->{_t} = EV::timer(TOCONNECT, 0, $self->{_cb_t});
$self->{_master}{ip} = $ip;
$self->{_master}->EVENT(RESOLVED);
});
}
return;
}
sub WRITE {
my ($self) = @_;
if ($self->{_state} == HANDLING) {
$self->{_cb_w}->();
}
return;
}
sub _resolve {
my ($host, $plugin, $cb) = @_;
if ($host =~ /\A\d{1,3}[.]\d{1,3}[.]\d{1,3}[.]\d{1,3}\z/xms) {
$cb->($plugin, $host);
}
else {
weaken($plugin);
# AnyEvent::DNS has own timeouts, so we don't setup own here.
AnyEvent::DNS::a $host, sub {
my (@a) = @_;
return if !$plugin;
if (@a) {
$cb->($plugin, @a);
}
else {
$plugin->{_master}->EVENT(0, EDNS);
}
return;
};
}
return;
}
sub T {
my ($self) = @_;
my $m = $self->{_master};
$m->EVENT(0, $self->{_state} == CONNECTING ? ETOCONNECT : ETOWRITE);
return;
}
sub R {
my ($self) = @_;
my $m = $self->{_master};
my $n = sysread $self->{fh}, $m->{in_buf}, BUFSIZE, length $m->{in_buf};
if (defined $n) {
if ($n) {
$m->{in_bytes} += $n;
$m->EVENT(IN);
}
elsif (!$m->{is_eof}) { # EOF delivered only once
$m->{is_eof} = 1;
$m->EVENT(EOF);
}
}
elsif ($! != EAGAIN) { # may need to handle EINTR too
$m->EVENT(0, $!);
}
return;
}
sub W {
my ($self) = @_;
my $m = $self->{_master};
my $e = 0;
if ($self->{_state} == CONNECTING) {
$self->{_state} = HANDLING;
undef $self->{_t};
undef $self->{_w};
$e |= CONNECTED;
}
my $len = length $m->{out_buf};
my $has_out = defined $m->{out_pos} ? ($len > $m->{out_pos}) : ($len>0);
if ($has_out) {
my $n = syswrite $self->{fh}, $m->{out_buf}, BUFSIZE, $m->{out_pos}||0;
if (!defined $n) {
if ($! != EAGAIN) {
$m->EVENT($e, $!);
return; # WARNING leave {_w} unchanged
}
}
else {
$m->{out_bytes} += $n;
if (defined $m->{out_pos}) {
$m->{out_pos} += $n;
$has_out = $len > $m->{out_pos};
}
else {
substr $m->{out_buf}, 0, $n, q{};
$has_out = $len > $n;
}
if ($self->{_t}) {
$self->{_t} = EV::timer(TOWRITE, 0, $self->{_cb_t});
}
$e |= $has_out ? OUT : (OUT|SENT);
}
}
if ($self->{_w} && !$has_out) {
undef $self->{_w};
undef $self->{_t};
}
elsif (!$self->{_w} && $has_out) {
$self->{_w} = EV::io($self->{fh}, EV::WRITE, $self->{_cb_w});
$self->{_t} = EV::timer(TOWRITE, 0, $self->{_cb_t});
}
$m->EVENT($e);
return;
}
1;
|
