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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.29 by root, Sat May 24 23:10:18 2008 UTC vs.
Revision 1.39 by root, Tue May 27 04:59:51 2008 UTC

… …
2 2
3no warnings; 3no warnings;
4use strict; 4use strict;
5 5
6use AnyEvent (); 6use AnyEvent ();
7use AnyEvent::Util (); 7use AnyEvent::Util qw(WSAWOULDBLOCK);
8use Scalar::Util (); 8use Scalar::Util ();
9use Carp (); 9use Carp ();
10use Fcntl (); 10use Fcntl ();
11use Errno qw/EAGAIN EINTR/; 11use Errno qw/EAGAIN EINTR/;
12 12
13=head1 NAME 13=head1 NAME
14 14
15AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent 15AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16 16
17This module is experimental.
18
19=cut 17=cut
20 18
21our $VERSION = '0.04'; 19our $VERSION = '0.04';
22 20
23=head1 SYNOPSIS 21=head1 SYNOPSIS
… …
25 use AnyEvent; 23 use AnyEvent;
26 use AnyEvent::Handle; 24 use AnyEvent::Handle;
27 25
28 my $cv = AnyEvent->condvar; 26 my $cv = AnyEvent->condvar;
29 27
30 my $ae_fh = AnyEvent::Handle->new (fh => \*STDIN); 28 my $handle =
31
32 #TODO
33
34 # or use the constructor to pass the callback:
35
36 my $ae_fh2 =
37 AnyEvent::Handle->new ( 29 AnyEvent::Handle->new (
38 fh => \*STDIN, 30 fh => \*STDIN,
39 on_eof => sub { 31 on_eof => sub {
40 $cv->broadcast; 32 $cv->broadcast;
41 }, 33 },
42 #TODO
43 ); 34 );
44 35
45 $cv->wait; 36 # send some request line
37 $handle->push_write ("getinfo\015\012");
38
39 # read the response line
40 $handle->push_read (line => sub {
41 my ($handle, $line) = @_;
42 warn "read line <$line>\n";
43 $cv->send;
44 });
45
46 $cv->recv;
46 47
47=head1 DESCRIPTION 48=head1 DESCRIPTION
48 49
49This module is a helper module to make it easier to do event-based I/O on 50This module is a helper module to make it easier to do event-based I/O on
50filehandles. For utility functions for doing non-blocking connects and accepts 51filehandles. For utility functions for doing non-blocking connects and accepts
… …
91The object will not be in a usable state when this callback has been 92The object will not be in a usable state when this callback has been
92called. 93called.
93 94
94On callback entrance, the value of C<$!> contains the operating system 95On callback entrance, the value of C<$!> contains the operating system
95error (or C<ENOSPC>, C<EPIPE> or C<EBADMSG>). 96error (or C<ENOSPC>, C<EPIPE> or C<EBADMSG>).
97
98The callback should throw an exception. If it returns, then
99AnyEvent::Handle will C<croak> for you.
96 100
97While not mandatory, it is I<highly> recommended to set this callback, as 101While not mandatory, it is I<highly> recommended to set this callback, as
98you will not be notified of errors otherwise. The default simply calls 102you will not be notified of errors otherwise. The default simply calls
99die. 103die.
100 104
… …
164 168
165Use the given Net::SSLeay::CTX object to create the new TLS connection 169Use the given Net::SSLeay::CTX object to create the new TLS connection
166(unless a connection object was specified directly). If this parameter is 170(unless a connection object was specified directly). If this parameter is
167missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. 171missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.
168 172
173=item filter_r => $cb
174
175=item filter_w => $cb
176
177These exist, but are undocumented at this time.
178
169=back 179=back
170 180
171=cut 181=cut
172
173our (%RH, %WH);
174
175sub register_read_type($$) {
176 $RH{$_[0]} = $_[1];
177}
178
179sub register_write_type($$) {
180 $WH{$_[0]} = $_[1];
181}
182 182
183sub new { 183sub new {
184 my $class = shift; 184 my $class = shift;
185 185
186 my $self = bless { @_ }, $class; 186 my $self = bless { @_ }, $class;
… …
205} 205}
206 206
207sub _shutdown { 207sub _shutdown {
208 my ($self) = @_; 208 my ($self) = @_;
209 209
210 delete $self->{rw}; 210 delete $self->{_rw};
211 delete $self->{ww}; 211 delete $self->{_ww};
212 delete $self->{fh}; 212 delete $self->{fh};
213} 213}
214 214
215sub error { 215sub error {
216 my ($self) = @_; 216 my ($self) = @_;
… …
218 { 218 {
219 local $!; 219 local $!;
220 $self->_shutdown; 220 $self->_shutdown;
221 } 221 }
222 222
223 if ($self->{on_error}) {
224 $self->{on_error}($self); 223 $self->{on_error}($self)
225 } else { 224 if $self->{on_error};
225
226 Carp::croak "AnyEvent::Handle uncaught fatal error: $!"; 226 Carp::croak "AnyEvent::Handle uncaught fatal error: $!";
227 }
228} 227}
229 228
230=item $fh = $handle->fh 229=item $fh = $handle->fh
231 230
232This method returns the file handle of the L<AnyEvent::Handle> object. 231This method returns the file handle of the L<AnyEvent::Handle> object.
233 232
234=cut 233=cut
235 234
236sub fh { $_[0]->{fh} } 235sub fh { $_[0]{fh} }
237 236
238=item $handle->on_error ($cb) 237=item $handle->on_error ($cb)
239 238
240Replace the current C<on_error> callback (see the C<on_error> constructor argument). 239Replace the current C<on_error> callback (see the C<on_error> constructor argument).
241 240
… …
297=cut 296=cut
298 297
299sub _drain_wbuf { 298sub _drain_wbuf {
300 my ($self) = @_; 299 my ($self) = @_;
301 300
302 if (!$self->{ww} && length $self->{wbuf}) { 301 if (!$self->{_ww} && length $self->{wbuf}) {
302
303 Scalar::Util::weaken $self; 303 Scalar::Util::weaken $self;
304
304 my $cb = sub { 305 my $cb = sub {
305 my $len = syswrite $self->{fh}, $self->{wbuf}; 306 my $len = syswrite $self->{fh}, $self->{wbuf};
306 307
307 if ($len >= 0) { 308 if ($len >= 0) {
308 substr $self->{wbuf}, 0, $len, ""; 309 substr $self->{wbuf}, 0, $len, "";
309 310
310 $self->{on_drain}($self) 311 $self->{on_drain}($self)
311 if $self->{low_water_mark} >= length $self->{wbuf} 312 if $self->{low_water_mark} >= length $self->{wbuf}
312 && $self->{on_drain}; 313 && $self->{on_drain};
313 314
314 delete $self->{ww} unless length $self->{wbuf}; 315 delete $self->{_ww} unless length $self->{wbuf};
315 } elsif ($! != EAGAIN && $! != EINTR) { 316 } elsif ($! != EAGAIN && $! != EINTR && $! != WSAWOULDBLOCK) {
316 $self->error; 317 $self->error;
317 } 318 }
318 }; 319 };
319 320
321 # try to write data immediately
322 $cb->();
323
324 # if still data left in wbuf, we need to poll
320 $self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb); 325 $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)
321 326 if length $self->{wbuf};
322 $cb->($self);
323 }; 327 };
328}
329
330our %WH;
331
332sub register_write_type($$) {
333 $WH{$_[0]} = $_[1];
324} 334}
325 335
326sub push_write { 336sub push_write {
327 my $self = shift; 337 my $self = shift;
328 338
… …
346=item $handle->unshift_write (type => @args) 356=item $handle->unshift_write (type => @args)
347 357
348Instead of formatting your data yourself, you can also let this module do 358Instead of formatting your data yourself, you can also let this module do
349the job by specifying a type and type-specific arguments. 359the job by specifying a type and type-specific arguments.
350 360
351Predefined types are: 361Predefined types are (if you have ideas for additional types, feel free to
362drop by and tell us):
352 363
353=over 4 364=over 4
354 365
355=item netstring => $string 366=item netstring => $string
356 367
357Formats the given value as netstring 368Formats the given value as netstring
358(http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them). 369(http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them).
359 370
371=back
372
360=cut 373=cut
361 374
362register_write_type netstring => sub { 375register_write_type netstring => sub {
363 my ($self, $string) = @_; 376 my ($self, $string) = @_;
364 377
365 sprintf "%d:%s,", (length $string), $string 378 sprintf "%d:%s,", (length $string), $string
366}; 379};
367 380
368=back 381=item json => $array_or_hashref
369 382
370=cut 383=item AnyEvent::Handle::register_write_type type => $coderef->($self, @args)
371 384
385This function (not method) lets you add your own types to C<push_write>.
386Whenever the given C<type> is used, C<push_write> will invoke the code
387reference with the handle object and the remaining arguments.
372 388
389The code reference is supposed to return a single octet string that will
390be appended to the write buffer.
391
392Note that this is a function, and all types registered this way will be
393global, so try to use unique names.
394
395=cut
373 396
374############################################################################# 397#############################################################################
375 398
376=back 399=back
377 400
… …
456 479
457 if ( 480 if (
458 defined $self->{rbuf_max} 481 defined $self->{rbuf_max}
459 && $self->{rbuf_max} < length $self->{rbuf} 482 && $self->{rbuf_max} < length $self->{rbuf}
460 ) { 483 ) {
461 $! = &Errno::ENOSPC; return $self->error; 484 $! = &Errno::ENOSPC;
485 $self->error;
462 } 486 }
463 487
464 return if $self->{in_drain}; 488 return if $self->{in_drain};
465 local $self->{in_drain} = 1; 489 local $self->{in_drain} = 1;
466 490
467 while (my $len = length $self->{rbuf}) { 491 while (my $len = length $self->{rbuf}) {
468 no strict 'refs'; 492 no strict 'refs';
469 if (my $cb = shift @{ $self->{queue} }) { 493 if (my $cb = shift @{ $self->{_queue} }) {
470 unless ($cb->($self)) { 494 unless ($cb->($self)) {
471 if ($self->{eof}) { 495 if ($self->{_eof}) {
472 # no progress can be made (not enough data and no data forthcoming) 496 # no progress can be made (not enough data and no data forthcoming)
473 $! = &Errno::EPIPE; return $self->error; 497 $! = &Errno::EPIPE;
498 $self->error;
474 } 499 }
475 500
476 unshift @{ $self->{queue} }, $cb; 501 unshift @{ $self->{_queue} }, $cb;
477 return; 502 return;
478 } 503 }
479 } elsif ($self->{on_read}) { 504 } elsif ($self->{on_read}) {
480 $self->{on_read}($self); 505 $self->{on_read}($self);
481 506
482 if ( 507 if (
483 $self->{eof} # if no further data will arrive 508 $self->{_eof} # if no further data will arrive
484 && $len == length $self->{rbuf} # and no data has been consumed 509 && $len == length $self->{rbuf} # and no data has been consumed
485 && !@{ $self->{queue} } # and the queue is still empty 510 && !@{ $self->{_queue} } # and the queue is still empty
486 && $self->{on_read} # and we still want to read data 511 && $self->{on_read} # and we still want to read data
487 ) { 512 ) {
488 # then no progress can be made 513 # then no progress can be made
489 $! = &Errno::EPIPE; return $self->error; 514 $! = &Errno::EPIPE;
515 $self->error;
490 } 516 }
491 } else { 517 } else {
492 # read side becomes idle 518 # read side becomes idle
493 delete $self->{rw}; 519 delete $self->{_rw};
494 return; 520 return;
495 } 521 }
496 } 522 }
497 523
498 if ($self->{eof}) { 524 if ($self->{_eof}) {
499 $self->_shutdown; 525 $self->_shutdown;
500 $self->{on_eof}($self) 526 $self->{on_eof}($self)
501 if $self->{on_eof}; 527 if $self->{on_eof};
502 } 528 }
503} 529}
… …
552interested in (which can be none at all) and return a true value. After returning 578interested in (which can be none at all) and return a true value. After returning
553true, it will be removed from the queue. 579true, it will be removed from the queue.
554 580
555=cut 581=cut
556 582
583our %RH;
584
585sub register_read_type($$) {
586 $RH{$_[0]} = $_[1];
587}
588
557sub push_read { 589sub push_read {
558 my $self = shift; 590 my $self = shift;
559 my $cb = pop; 591 my $cb = pop;
560 592
561 if (@_) { 593 if (@_) {
… …
563 595
564 $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") 596 $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
565 ->($self, $cb, @_); 597 ->($self, $cb, @_);
566 } 598 }
567 599
568 push @{ $self->{queue} }, $cb; 600 push @{ $self->{_queue} }, $cb;
569 $self->_drain_rbuf; 601 $self->_drain_rbuf;
570} 602}
571 603
572sub unshift_read { 604sub unshift_read {
573 my $self = shift; 605 my $self = shift;
… …
579 $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read") 611 $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read")
580 ->($self, $cb, @_); 612 ->($self, $cb, @_);
581 } 613 }
582 614
583 615
584 unshift @{ $self->{queue} }, $cb; 616 unshift @{ $self->{_queue} }, $cb;
585 $self->_drain_rbuf; 617 $self->_drain_rbuf;
586} 618}
587 619
588=item $handle->push_read (type => @args, $cb) 620=item $handle->push_read (type => @args, $cb)
589 621
… …
591 623
592Instead of providing a callback that parses the data itself you can chose 624Instead of providing a callback that parses the data itself you can chose
593between a number of predefined parsing formats, for chunks of data, lines 625between a number of predefined parsing formats, for chunks of data, lines
594etc. 626etc.
595 627
596The types currently supported are: 628Predefined types are (if you have ideas for additional types, feel free to
629drop by and tell us):
597 630
598=over 4 631=over 4
599 632
600=item chunk => $octets, $cb->($self, $data) 633=item chunk => $octets, $cb->($self, $data)
601 634
… …
713 746
714 1 747 1
715 } 748 }
716}; 749};
717 750
751=item regex => $accept[, $reject[, $skip], $cb->($data)
752
753Makes a regex match against the regex object C<$accept> and returns
754everything up to and including the match.
755
756Example: read a single line terminated by '\n'.
757
758 $handle->push_read (regex => qr<\n>, sub { ... });
759
760If C<$reject> is given and not undef, then it determines when the data is
761to be rejected: it is matched against the data when the C<$accept> regex
762does not match and generates an C<EBADMSG> error when it matches. This is
763useful to quickly reject wrong data (to avoid waiting for a timeout or a
764receive buffer overflow).
765
766Example: expect a single decimal number followed by whitespace, reject
767anything else (not the use of an anchor).
768
769 $handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... });
770
771If C<$skip> is given and not C<undef>, then it will be matched against
772the receive buffer when neither C<$accept> nor C<$reject> match,
773and everything preceding and including the match will be accepted
774unconditionally. This is useful to skip large amounts of data that you
775know cannot be matched, so that the C<$accept> or C<$reject> regex do not
776have to start matching from the beginning. This is purely an optimisation
777and is usually worth only when you expect more than a few kilobytes.
778
779Example: expect a http header, which ends at C<\015\012\015\012>. Since we
780expect the header to be very large (it isn't in practise, but...), we use
781a skip regex to skip initial portions. The skip regex is tricky in that
782it only accepts something not ending in either \015 or \012, as these are
783required for the accept regex.
784
785 $handle->push_read (regex =>
786 qr<\015\012\015\012>,
787 undef, # no reject
788 qr<^.*[^\015\012]>,
789 sub { ... });
790
791=cut
792
793register_read_type regex => sub {
794 my ($self, $cb, $accept, $reject, $skip) = @_;
795
796 my $data;
797 my $rbuf = \$self->{rbuf};
798
799 sub {
800 # accept
801 if ($$rbuf =~ $accept) {
802 $data .= substr $$rbuf, 0, $+[0], "";
803 $cb->($self, $data);
804 return 1;
805 }
806
807 # reject
808 if ($reject && $$rbuf =~ $reject) {
809 $! = &Errno::EBADMSG;
810 $self->error;
811 }
812
813 # skip
814 if ($skip && $$rbuf =~ $skip) {
815 $data .= substr $$rbuf, 0, $+[0], "";
816 }
817
818 ()
819 }
820};
821
718=back 822=back
823
824=item AnyEvent::Handle::register_read_type type => $coderef->($self, $cb, @args)
825
826This function (not method) lets you add your own types to C<push_read>.
827
828Whenever the given C<type> is used, C<push_read> will invoke the code
829reference with the handle object, the callback and the remaining
830arguments.
831
832The code reference is supposed to return a callback (usually a closure)
833that works as a plain read callback (see C<< ->push_read ($cb) >>).
834
835It should invoke the passed callback when it is done reading (remember to
836pass C<$self> as first argument as all other callbacks do that).
837
838Note that this is a function, and all types registered this way will be
839global, so try to use unique names.
840
841For examples, see the source of this module (F<perldoc -m AnyEvent::Handle>,
842search for C<register_read_type>)).
719 843
720=item $handle->stop_read 844=item $handle->stop_read
721 845
722=item $handle->start_read 846=item $handle->start_read
723 847
… …
729=cut 853=cut
730 854
731sub stop_read { 855sub stop_read {
732 my ($self) = @_; 856 my ($self) = @_;
733 857
734 delete $self->{rw}; 858 delete $self->{_rw};
735} 859}
736 860
737sub start_read { 861sub start_read {
738 my ($self) = @_; 862 my ($self) = @_;
739 863
740 unless ($self->{rw} || $self->{eof}) { 864 unless ($self->{_rw} || $self->{_eof}) {
741 Scalar::Util::weaken $self; 865 Scalar::Util::weaken $self;
742 866
743 $self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { 867 $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {
744 my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; 868 my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf};
745 my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; 869 my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf;
746 870
747 if ($len > 0) { 871 if ($len > 0) {
748 $self->{filter_r} 872 $self->{filter_r}
749 ? $self->{filter_r}->($self, $rbuf) 873 ? $self->{filter_r}->($self, $rbuf)
750 : $self->_drain_rbuf; 874 : $self->_drain_rbuf;
751 875
752 } elsif (defined $len) { 876 } elsif (defined $len) {
753 delete $self->{rw}; 877 delete $self->{_rw};
754 $self->{eof} = 1; 878 $self->{_eof} = 1;
755 $self->_drain_rbuf; 879 $self->_drain_rbuf;
756 880
757 } elsif ($! != EAGAIN && $! != EINTR) { 881 } elsif ($! != EAGAIN && $! != EINTR && $! != &AnyEvent::Util::WSAWOULDBLOCK) {
758 return $self->error; 882 return $self->error;
759 } 883 }
760 }); 884 });
761 } 885 }
762} 886}
763 887
764sub _dotls { 888sub _dotls {
765 my ($self) = @_; 889 my ($self) = @_;
766 890
767 if (length $self->{tls_wbuf}) { 891 if (length $self->{_tls_wbuf}) {
768 while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{tls_wbuf})) > 0) { 892 while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
769 substr $self->{tls_wbuf}, 0, $len, ""; 893 substr $self->{_tls_wbuf}, 0, $len, "";
770 } 894 }
771 } 895 }
772 896
773 if (defined (my $buf = Net::SSLeay::BIO_read ($self->{tls_wbio}))) { 897 if (defined (my $buf = Net::SSLeay::BIO_read ($self->{_wbio}))) {
774 $self->{wbuf} .= $buf; 898 $self->{wbuf} .= $buf;
775 $self->_drain_wbuf; 899 $self->_drain_wbuf;
776 } 900 }
777 901
778 while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) { 902 while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) {
… …
804C<"connect">, C<"accept"> or an existing Net::SSLeay object). 928C<"connect">, C<"accept"> or an existing Net::SSLeay object).
805 929
806The second argument is the optional C<Net::SSLeay::CTX> object that is 930The second argument is the optional C<Net::SSLeay::CTX> object that is
807used when AnyEvent::Handle has to create its own TLS connection object. 931used when AnyEvent::Handle has to create its own TLS connection object.
808 932
933The TLS connection object will end up in C<< $handle->{tls} >> after this
934call and can be used or changed to your liking. Note that the handshake
935might have already started when this function returns.
936
809=cut 937=cut
810 938
811# TODO: maybe document... 939# TODO: maybe document...
812sub starttls { 940sub starttls {
813 my ($self, $ssl, $ctx) = @_; 941 my ($self, $ssl, $ctx) = @_;
… …
828 # but the openssl maintainers basically said: "trust us, it just works". 956 # but the openssl maintainers basically said: "trust us, it just works".
829 # (unfortunately, we have to hardcode constants because the abysmally misdesigned 957 # (unfortunately, we have to hardcode constants because the abysmally misdesigned
830 # and mismaintained ssleay-module doesn't even offer them). 958 # and mismaintained ssleay-module doesn't even offer them).
831 # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html 959 # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html
832 Net::SSLeay::CTX_set_mode ($self->{tls}, 960 Net::SSLeay::CTX_set_mode ($self->{tls},
833 (eval { Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) 961 (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1)
834 | (eval { Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); 962 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2));
835 963
836 $self->{tls_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); 964 $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
837 $self->{tls_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); 965 $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
838 966
839 Net::SSLeay::set_bio ($ssl, $self->{tls_rbio}, $self->{tls_wbio}); 967 Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});
840 968
841 $self->{filter_w} = sub { 969 $self->{filter_w} = sub {
842 $_[0]{tls_wbuf} .= ${$_[1]}; 970 $_[0]{_tls_wbuf} .= ${$_[1]};
843 &_dotls; 971 &_dotls;
844 }; 972 };
845 $self->{filter_r} = sub { 973 $self->{filter_r} = sub {
846 Net::SSLeay::BIO_write ($_[0]{tls_rbio}, ${$_[1]}); 974 Net::SSLeay::BIO_write ($_[0]{_rbio}, ${$_[1]});
847 &_dotls; 975 &_dotls;
848 }; 976 };
849} 977}
850 978
851=item $handle->stoptls 979=item $handle->stoptls
… …
857 985
858sub stoptls { 986sub stoptls {
859 my ($self) = @_; 987 my ($self) = @_;
860 988
861 Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; 989 Net::SSLeay::free (delete $self->{tls}) if $self->{tls};
990
862 delete $self->{tls_rbio}; 991 delete $self->{_rbio};
863 delete $self->{tls_wbio}; 992 delete $self->{_wbio};
864 delete $self->{tls_wbuf}; 993 delete $self->{_tls_wbuf};
865 delete $self->{filter_r}; 994 delete $self->{filter_r};
866 delete $self->{filter_w}; 995 delete $self->{filter_w};
867} 996}
868 997
869sub DESTROY { 998sub DESTROY {
… …
907 } 1036 }
908} 1037}
909 1038
910=back 1039=back
911 1040
1041=head1 SUBCLASSING AnyEvent::Handle
1042
1043In many cases, you might want to subclass AnyEvent::Handle.
1044
1045To make this easier, a given version of AnyEvent::Handle uses these
1046conventions:
1047
1048=over 4
1049
1050=item * all constructor arguments become object members.
1051
1052At least initially, when you pass a C<tls>-argument to the constructor it
1053will end up in C<< $handle->{tls} >>. Those members might be changes or
1054mutated later on (for example C<tls> will hold the TLS connection object).
1055
1056=item * other object member names are prefixed with an C<_>.
1057
1058All object members not explicitly documented (internal use) are prefixed
1059with an underscore character, so the remaining non-C<_>-namespace is free
1060for use for subclasses.
1061
1062=item * all members not documented here and not prefixed with an underscore
1063are free to use in subclasses.
1064
1065Of course, new versions of AnyEvent::Handle may introduce more "public"
1066member variables, but thats just life, at least it is documented.
1067
1068=back
1069
912=head1 AUTHOR 1070=head1 AUTHOR
913 1071
914Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. 1072Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>.
915 1073
916=cut 1074=cut

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