1 | package AnyEvent::Handle; |
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2 | |
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3 | use Scalar::Util (); |
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4 | use Carp (); |
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5 | use Errno qw(EAGAIN EINTR); |
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6 | |
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7 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
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8 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
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9 | |
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10 | =head1 NAME |
1 | =head1 NAME |
11 | |
2 | |
12 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
3 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
13 | |
4 | |
14 | =cut |
5 | =cut |
15 | |
6 | |
16 | our $VERSION = 4.87; |
7 | our $VERSION = 4.92; |
17 | |
8 | |
18 | =head1 SYNOPSIS |
9 | =head1 SYNOPSIS |
19 | |
10 | |
20 | use AnyEvent; |
11 | use AnyEvent; |
21 | use AnyEvent::Handle; |
12 | use AnyEvent::Handle; |
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59 | C<on_error> callback. |
50 | C<on_error> callback. |
60 | |
51 | |
61 | All callbacks will be invoked with the handle object as their first |
52 | All callbacks will be invoked with the handle object as their first |
62 | argument. |
53 | argument. |
63 | |
54 | |
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55 | =cut |
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56 | |
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57 | package AnyEvent::Handle; |
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58 | |
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59 | use Scalar::Util (); |
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60 | use List::Util (); |
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61 | use Carp (); |
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62 | use Errno qw(EAGAIN EINTR); |
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63 | |
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64 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
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65 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
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66 | |
64 | =head1 METHODS |
67 | =head1 METHODS |
65 | |
68 | |
66 | =over 4 |
69 | =over 4 |
67 | |
70 | |
68 | =item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value... |
71 | =item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value... |
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216 | memory and push it into the queue, but instead only read more data from |
219 | memory and push it into the queue, but instead only read more data from |
217 | the file when the write queue becomes empty. |
220 | the file when the write queue becomes empty. |
218 | |
221 | |
219 | =item timeout => $fractional_seconds |
222 | =item timeout => $fractional_seconds |
220 | |
223 | |
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224 | =item rtimeout => $fractional_seconds |
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225 | |
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226 | =item wtimeout => $fractional_seconds |
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227 | |
221 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
228 | If non-zero, then these enables an "inactivity" timeout: whenever this |
222 | seconds pass without a successful read or write on the underlying file |
229 | many seconds pass without a successful read or write on the underlying |
223 | handle, the C<on_timeout> callback will be invoked (and if that one is |
230 | file handle (or a call to C<timeout_reset>), the C<on_timeout> callback |
224 | missing, a non-fatal C<ETIMEDOUT> error will be raised). |
231 | will be invoked (and if that one is missing, a non-fatal C<ETIMEDOUT> |
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232 | error will be raised). |
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233 | |
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234 | There are three variants of the timeouts that work fully independent |
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235 | of each other, for both read and write, just read, and just write: |
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236 | C<timeout>, C<rtimeout> and C<wtimeout>, with corresponding callbacks |
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237 | C<on_timeout>, C<on_rtimeout> and C<on_wtimeout>, and reset functions |
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238 | C<timeout_reset>, C<rtimeout_reset>, and C<wtimeout_reset>. |
225 | |
239 | |
226 | Note that timeout processing is also active when you currently do not have |
240 | Note that timeout processing is also active when you currently do not have |
227 | any outstanding read or write requests: If you plan to keep the connection |
241 | any outstanding read or write requests: If you plan to keep the connection |
228 | idle then you should disable the timout temporarily or ignore the timeout |
242 | idle then you should disable the timout temporarily or ignore the timeout |
229 | in the C<on_timeout> callback, in which case AnyEvent::Handle will simply |
243 | in the C<on_timeout> callback, in which case AnyEvent::Handle will simply |
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474 | sub _start { |
488 | sub _start { |
475 | my ($self) = @_; |
489 | my ($self) = @_; |
476 | |
490 | |
477 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
491 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
478 | |
492 | |
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493 | $self->{_activity} = |
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494 | $self->{_ractivity} = |
479 | $self->{_activity} = AnyEvent->now; |
495 | $self->{_wactivity} = AE::now; |
480 | $self->_timeout; |
496 | |
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497 | $self->timeout (delete $self->{timeout} ) if $self->{timeout}; |
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498 | $self->rtimeout (delete $self->{rtimeout}) if $self->{rtimeout}; |
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499 | $self->wtimeout (delete $self->{wtimeout}) if $self->{wtimeout}; |
481 | |
500 | |
482 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
501 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
483 | |
502 | |
484 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
503 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
485 | if $self->{tls}; |
504 | if $self->{tls}; |
… | |
… | |
544 | $_[0]{on_eof} = $_[1]; |
563 | $_[0]{on_eof} = $_[1]; |
545 | } |
564 | } |
546 | |
565 | |
547 | =item $handle->on_timeout ($cb) |
566 | =item $handle->on_timeout ($cb) |
548 | |
567 | |
549 | Replace the current C<on_timeout> callback, or disables the callback (but |
568 | =item $handle->on_rtimeout ($cb) |
550 | not the timeout) if C<$cb> = C<undef>. See the C<timeout> constructor |
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551 | argument and method. |
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552 | |
569 | |
553 | =cut |
570 | =item $handle->on_wtimeout ($cb) |
554 | |
571 | |
555 | sub on_timeout { |
572 | Replace the current C<on_timeout>, C<on_rtimeout> or C<on_wtimeout> |
556 | $_[0]{on_timeout} = $_[1]; |
573 | callback, or disables the callback (but not the timeout) if C<$cb> = |
557 | } |
574 | C<undef>. See the C<timeout> constructor argument and method. |
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575 | |
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576 | =cut |
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577 | |
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578 | # see below |
558 | |
579 | |
559 | =item $handle->autocork ($boolean) |
580 | =item $handle->autocork ($boolean) |
560 | |
581 | |
561 | Enables or disables the current autocork behaviour (see C<autocork> |
582 | Enables or disables the current autocork behaviour (see C<autocork> |
562 | constructor argument). Changes will only take effect on the next write. |
583 | constructor argument). Changes will only take effect on the next write. |
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602 | |
623 | |
603 | sub on_starttls { |
624 | sub on_starttls { |
604 | $_[0]{on_stoptls} = $_[1]; |
625 | $_[0]{on_stoptls} = $_[1]; |
605 | } |
626 | } |
606 | |
627 | |
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628 | =item $handle->rbuf_max ($max_octets) |
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629 | |
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630 | Configures the C<rbuf_max> setting (C<undef> disables it). |
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631 | |
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632 | =cut |
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633 | |
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634 | sub rbuf_max { |
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635 | $_[0]{rbuf_max} = $_[1]; |
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636 | } |
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637 | |
607 | ############################################################################# |
638 | ############################################################################# |
608 | |
639 | |
609 | =item $handle->timeout ($seconds) |
640 | =item $handle->timeout ($seconds) |
610 | |
641 | |
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642 | =item $handle->rtimeout ($seconds) |
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643 | |
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644 | =item $handle->wtimeout ($seconds) |
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645 | |
611 | Configures (or disables) the inactivity timeout. |
646 | Configures (or disables) the inactivity timeout. |
612 | |
647 | |
613 | =cut |
648 | =item $handle->timeout_reset |
614 | |
649 | |
615 | sub timeout { |
650 | =item $handle->rtimeout_reset |
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651 | |
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652 | =item $handle->wtimeout_reset |
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653 | |
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654 | Reset the activity timeout, as if data was received or sent. |
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655 | |
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656 | These methods are cheap to call. |
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657 | |
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658 | =cut |
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659 | |
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660 | for my $dir ("", "r", "w") { |
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661 | my $timeout = "${dir}timeout"; |
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662 | my $tw = "_${dir}tw"; |
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663 | my $on_timeout = "on_${dir}timeout"; |
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664 | my $activity = "_${dir}activity"; |
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665 | my $cb; |
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666 | |
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667 | *$on_timeout = sub { |
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668 | $_[0]{$on_timeout} = $_[1]; |
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669 | }; |
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670 | |
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671 | *$timeout = sub { |
616 | my ($self, $timeout) = @_; |
672 | my ($self, $new_value) = @_; |
617 | |
673 | |
618 | $self->{timeout} = $timeout; |
674 | $self->{$timeout} = $new_value; |
619 | $self->_timeout; |
675 | delete $self->{$tw}; &$cb; |
620 | } |
676 | }; |
621 | |
677 | |
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678 | *{"${dir}timeout_reset"} = sub { |
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679 | $_[0]{$activity} = AE::now; |
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680 | }; |
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681 | |
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682 | # main workhorse: |
622 | # reset the timeout watcher, as neccessary |
683 | # reset the timeout watcher, as neccessary |
623 | # also check for time-outs |
684 | # also check for time-outs |
624 | sub _timeout { |
685 | $cb = sub { |
625 | my ($self) = @_; |
686 | my ($self) = @_; |
626 | |
687 | |
627 | if ($self->{timeout} && $self->{fh}) { |
688 | if ($self->{$timeout} && $self->{fh}) { |
628 | my $NOW = AnyEvent->now; |
689 | my $NOW = AE::now; |
629 | |
690 | |
630 | # when would the timeout trigger? |
691 | # when would the timeout trigger? |
631 | my $after = $self->{_activity} + $self->{timeout} - $NOW; |
692 | my $after = $self->{$activity} + $self->{$timeout} - $NOW; |
632 | |
693 | |
633 | # now or in the past already? |
694 | # now or in the past already? |
634 | if ($after <= 0) { |
695 | if ($after <= 0) { |
635 | $self->{_activity} = $NOW; |
696 | $self->{$activity} = $NOW; |
636 | |
697 | |
637 | if ($self->{on_timeout}) { |
698 | if ($self->{$on_timeout}) { |
638 | $self->{on_timeout}($self); |
699 | $self->{$on_timeout}($self); |
639 | } else { |
700 | } else { |
640 | $self->_error (Errno::ETIMEDOUT); |
701 | $self->_error (Errno::ETIMEDOUT); |
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702 | } |
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703 | |
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704 | # callback could have changed timeout value, optimise |
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705 | return unless $self->{$timeout}; |
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706 | |
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707 | # calculate new after |
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708 | $after = $self->{$timeout}; |
641 | } |
709 | } |
642 | |
710 | |
643 | # callback could have changed timeout value, optimise |
711 | Scalar::Util::weaken $self; |
644 | return unless $self->{timeout}; |
712 | return unless $self; # ->error could have destroyed $self |
645 | |
713 | |
646 | # calculate new after |
714 | $self->{$tw} ||= AE::timer $after, 0, sub { |
647 | $after = $self->{timeout}; |
715 | delete $self->{$tw}; |
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716 | $cb->($self); |
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717 | }; |
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718 | } else { |
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719 | delete $self->{$tw}; |
648 | } |
720 | } |
649 | |
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650 | Scalar::Util::weaken $self; |
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651 | return unless $self; # ->error could have destroyed $self |
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652 | |
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653 | $self->{_tw} ||= AnyEvent->timer (after => $after, cb => sub { |
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654 | delete $self->{_tw}; |
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655 | $self->_timeout; |
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656 | }); |
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657 | } else { |
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658 | delete $self->{_tw}; |
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659 | } |
721 | } |
660 | } |
722 | } |
661 | |
723 | |
662 | ############################################################################# |
724 | ############################################################################# |
663 | |
725 | |
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711 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
773 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
712 | |
774 | |
713 | if (defined $len) { |
775 | if (defined $len) { |
714 | substr $self->{wbuf}, 0, $len, ""; |
776 | substr $self->{wbuf}, 0, $len, ""; |
715 | |
777 | |
716 | $self->{_activity} = AnyEvent->now; |
778 | $self->{_activity} = $self->{_wactivity} = AE::now; |
717 | |
779 | |
718 | $self->{on_drain}($self) |
780 | $self->{on_drain}($self) |
719 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
781 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
720 | && $self->{on_drain}; |
782 | && $self->{on_drain}; |
721 | |
783 | |
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727 | |
789 | |
728 | # try to write data immediately |
790 | # try to write data immediately |
729 | $cb->() unless $self->{autocork}; |
791 | $cb->() unless $self->{autocork}; |
730 | |
792 | |
731 | # if still data left in wbuf, we need to poll |
793 | # if still data left in wbuf, we need to poll |
732 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
794 | $self->{_ww} = AE::io $self->{fh}, 1, $cb |
733 | if length $self->{wbuf}; |
795 | if length $self->{wbuf}; |
734 | }; |
796 | }; |
735 | } |
797 | } |
736 | |
798 | |
737 | our %WH; |
799 | our %WH; |
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981 | |
1043 | |
982 | sub _drain_rbuf { |
1044 | sub _drain_rbuf { |
983 | my ($self) = @_; |
1045 | my ($self) = @_; |
984 | |
1046 | |
985 | # avoid recursion |
1047 | # avoid recursion |
986 | return if exists $self->{_skip_drain_rbuf}; |
1048 | return if $self->{_skip_drain_rbuf}; |
987 | local $self->{_skip_drain_rbuf} = 1; |
1049 | local $self->{_skip_drain_rbuf} = 1; |
988 | |
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989 | if ( |
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990 | defined $self->{rbuf_max} |
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991 | && $self->{rbuf_max} < length $self->{rbuf} |
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992 | ) { |
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993 | $self->_error (Errno::ENOSPC, 1), return; |
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994 | } |
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995 | |
1050 | |
996 | while () { |
1051 | while () { |
997 | # we need to use a separate tls read buffer, as we must not receive data while |
1052 | # we need to use a separate tls read buffer, as we must not receive data while |
998 | # we are draining the buffer, and this can only happen with TLS. |
1053 | # we are draining the buffer, and this can only happen with TLS. |
999 | $self->{rbuf} .= delete $self->{_tls_rbuf} |
1054 | $self->{rbuf} .= delete $self->{_tls_rbuf} |
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1039 | $self->{on_eof} |
1094 | $self->{on_eof} |
1040 | ? $self->{on_eof}($self) |
1095 | ? $self->{on_eof}($self) |
1041 | : $self->_error (0, 1, "Unexpected end-of-file"); |
1096 | : $self->_error (0, 1, "Unexpected end-of-file"); |
1042 | |
1097 | |
1043 | return; |
1098 | return; |
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1099 | } |
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1100 | |
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1101 | if ( |
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1102 | defined $self->{rbuf_max} |
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1103 | && $self->{rbuf_max} < length $self->{rbuf} |
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1104 | ) { |
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1105 | $self->_error (Errno::ENOSPC, 1), return; |
1044 | } |
1106 | } |
1045 | |
1107 | |
1046 | # may need to restart read watcher |
1108 | # may need to restart read watcher |
1047 | unless ($self->{_rw}) { |
1109 | unless ($self->{_rw}) { |
1048 | $self->start_read |
1110 | $self->start_read |
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… | |
1529 | my ($self) = @_; |
1591 | my ($self) = @_; |
1530 | |
1592 | |
1531 | unless ($self->{_rw} || $self->{_eof}) { |
1593 | unless ($self->{_rw} || $self->{_eof}) { |
1532 | Scalar::Util::weaken $self; |
1594 | Scalar::Util::weaken $self; |
1533 | |
1595 | |
1534 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1596 | $self->{_rw} = AE::io $self->{fh}, 0, sub { |
1535 | my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf}); |
1597 | my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf}); |
1536 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1598 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1537 | |
1599 | |
1538 | if ($len > 0) { |
1600 | if ($len > 0) { |
1539 | $self->{_activity} = AnyEvent->now; |
1601 | $self->{_activity} = $self->{_ractivity} = AE::now; |
1540 | |
1602 | |
1541 | if ($self->{tls}) { |
1603 | if ($self->{tls}) { |
1542 | Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf); |
1604 | Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf); |
1543 | |
1605 | |
1544 | &_dotls ($self); |
1606 | &_dotls ($self); |
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1552 | $self->_drain_rbuf; |
1614 | $self->_drain_rbuf; |
1553 | |
1615 | |
1554 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1616 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1555 | return $self->_error ($!, 1); |
1617 | return $self->_error ($!, 1); |
1556 | } |
1618 | } |
1557 | }); |
1619 | }; |
1558 | } |
1620 | } |
1559 | } |
1621 | } |
1560 | |
1622 | |
1561 | our $ERROR_SYSCALL; |
1623 | our $ERROR_SYSCALL; |
1562 | our $ERROR_WANT_READ; |
1624 | our $ERROR_WANT_READ; |
… | |
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1722 | Net::SSLeay::CTX_set_mode ($tls, 1|2); |
1784 | Net::SSLeay::CTX_set_mode ($tls, 1|2); |
1723 | |
1785 | |
1724 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1786 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1725 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1787 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1726 | |
1788 | |
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1789 | Net::SSLeay::BIO_write ($self->{_rbio}, delete $self->{rbuf}); |
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1790 | |
1727 | Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio}); |
1791 | Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio}); |
1728 | |
1792 | |
1729 | $self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) } |
1793 | $self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) } |
1730 | if $self->{on_starttls}; |
1794 | if $self->{on_starttls}; |
1731 | |
1795 | |
… | |
… | |
1760 | my ($self) = @_; |
1824 | my ($self) = @_; |
1761 | |
1825 | |
1762 | return unless $self->{tls}; |
1826 | return unless $self->{tls}; |
1763 | |
1827 | |
1764 | $self->{tls_ctx}->_put_session (delete $self->{tls}) |
1828 | $self->{tls_ctx}->_put_session (delete $self->{tls}) |
1765 | if ref $self->{tls}; |
1829 | if $self->{tls} > 0; |
1766 | |
1830 | |
1767 | delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)}; |
1831 | delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)}; |
1768 | } |
1832 | } |
1769 | |
1833 | |
1770 | sub DESTROY { |
1834 | sub DESTROY { |
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… | |
1778 | my $fh = delete $self->{fh}; |
1842 | my $fh = delete $self->{fh}; |
1779 | my $wbuf = delete $self->{wbuf}; |
1843 | my $wbuf = delete $self->{wbuf}; |
1780 | |
1844 | |
1781 | my @linger; |
1845 | my @linger; |
1782 | |
1846 | |
1783 | push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub { |
1847 | push @linger, AE::io $fh, 1, sub { |
1784 | my $len = syswrite $fh, $wbuf, length $wbuf; |
1848 | my $len = syswrite $fh, $wbuf, length $wbuf; |
1785 | |
1849 | |
1786 | if ($len > 0) { |
1850 | if ($len > 0) { |
1787 | substr $wbuf, 0, $len, ""; |
1851 | substr $wbuf, 0, $len, ""; |
1788 | } else { |
1852 | } else { |
1789 | @linger = (); # end |
1853 | @linger = (); # end |
1790 | } |
1854 | } |
1791 | }); |
1855 | }; |
1792 | push @linger, AnyEvent->timer (after => $linger, cb => sub { |
1856 | push @linger, AE::timer $linger, 0, sub { |
1793 | @linger = (); |
1857 | @linger = (); |
1794 | }); |
1858 | }; |
1795 | } |
1859 | } |
1796 | } |
1860 | } |
1797 | |
1861 | |
1798 | =item $handle->destroy |
1862 | =item $handle->destroy |
1799 | |
1863 | |
1800 | Shuts down the handle object as much as possible - this call ensures that |
1864 | Shuts down the handle object as much as possible - this call ensures that |
1801 | no further callbacks will be invoked and as many resources as possible |
1865 | no further callbacks will be invoked and as many resources as possible |
1802 | will be freed. You must not call any methods on the object afterwards. |
1866 | will be freed. Any method you will call on the handle object after |
|
|
1867 | destroying it in this way will be silently ignored (and it will return the |
|
|
1868 | empty list). |
1803 | |
1869 | |
1804 | Normally, you can just "forget" any references to an AnyEvent::Handle |
1870 | Normally, you can just "forget" any references to an AnyEvent::Handle |
1805 | object and it will simply shut down. This works in fatal error and EOF |
1871 | object and it will simply shut down. This works in fatal error and EOF |
1806 | callbacks, as well as code outside. It does I<NOT> work in a read or write |
1872 | callbacks, as well as code outside. It does I<NOT> work in a read or write |
1807 | callback, so when you want to destroy the AnyEvent::Handle object from |
1873 | callback, so when you want to destroy the AnyEvent::Handle object from |
… | |
… | |
1821 | sub destroy { |
1887 | sub destroy { |
1822 | my ($self) = @_; |
1888 | my ($self) = @_; |
1823 | |
1889 | |
1824 | $self->DESTROY; |
1890 | $self->DESTROY; |
1825 | %$self = (); |
1891 | %$self = (); |
|
|
1892 | bless $self, "AnyEvent::Handle::destroyed"; |
|
|
1893 | } |
|
|
1894 | |
|
|
1895 | sub AnyEvent::Handle::destroyed::AUTOLOAD { |
|
|
1896 | #nop |
1826 | } |
1897 | } |
1827 | |
1898 | |
1828 | =item AnyEvent::Handle::TLS_CTX |
1899 | =item AnyEvent::Handle::TLS_CTX |
1829 | |
1900 | |
1830 | This function creates and returns the AnyEvent::TLS object used by default |
1901 | This function creates and returns the AnyEvent::TLS object used by default |