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pbot/PBot/SelectHandler.pm
2020-07-15 11:07:35 -07:00

67 lines
1.7 KiB
Perl

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
package PBot::SelectHandler;
use parent 'PBot::Class';
use warnings; use strict;
use feature 'unicode_strings';
use IO::Select;
sub initialize {
my ($self, %conf) = @_;
$self->{select} = IO::Select->new();
$self->{readers} = {};
$self->{buffers} = {};
}
sub add_reader {
my ($self, $handle, $sub) = @_;
$self->{select}->add($handle);
$self->{readers}->{$handle} = $sub;
$self->{buffers}->{$handle} = "";
}
sub remove_reader {
my ($self, $handle) = @_;
$self->{select}->remove($handle);
delete $self->{readers}->{$handle};
delete $self->{buffers}->{$handle};
}
sub do_select {
my ($self) = @_;
my $length = 8192;
my @ready = $self->{select}->can_read(.1);
foreach my $fh (@ready) {
my $ret = sysread($fh, my $buf, $length);
if (not defined $ret) {
$self->{pbot}->{logger}->log("Error with $fh: $!\n");
$self->remove_reader($fh);
next;
}
if ($ret == 0) {
if (length $self->{buffers}->{$fh}) { $self->{readers}->{$fh}->($self->{buffers}->{$fh}); }
$self->remove_reader($fh);
next;
}
$self->{buffers}->{$fh} .= $buf;
if (not exists $self->{readers}->{$fh}) { $self->{pbot}->{logger}->log("Error: no reader for $fh\n"); }
else {
if ($ret < $length) {
$self->{readers}->{$fh}->($self->{buffers}->{$fh});
$self->{buffers}->{$fh} = "";
}
}
}
}
1;