[ViewVC] Diff of: cvs/AnyEvent/lib/AnyEvent/Handle.pm

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.134 by root, Fri Jul 3 00:09:04 2009 UTC vs.
Revision 1.161 by root, Sat Jul 25 06:16:45 2009 UTC

…		…
1	package AnyEvent::Handle;	1	package AnyEvent::Handle;
2		2
3	no warnings;
4	use strict qw(subs vars);
5
6	use AnyEvent ();
7	use AnyEvent::Util qw(WSAEWOULDBLOCK);
8	use Scalar::Util ();	3	use Scalar::Util ();
9	use Carp ();	4	use Carp ();
10	use Fcntl ();
11	use Errno qw(EAGAIN EINTR);	5	use Errno qw(EAGAIN EINTR);
12		6
		7	use AnyEvent (); BEGIN { AnyEvent::common_sense }
		8	use AnyEvent::Util qw(WSAEWOULDBLOCK);
		9
13	=head1 NAME	10	=head1 NAME
14		11
15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent	12	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16		13
17	=cut	14	=cut
18		15
19	our $VERSION = 4.45;	16	our $VERSION = 4.86;
20		17
21	=head1 SYNOPSIS	18	=head1 SYNOPSIS
22		19
23	use AnyEvent;	20	use AnyEvent;
24	use AnyEvent::Handle;	21	use AnyEvent::Handle;
25		22
26	my $cv = AnyEvent->condvar;	23	my $cv = AnyEvent->condvar;
27		24
28	my $handle =	25	my $hdl; $hdl = new AnyEvent::Handle
29	AnyEvent::Handle->new (
30	fh => \*STDIN,	26	fh => \*STDIN,
31	on_eof => sub {	27	on_error => sub {
		28	my ($hdl, $fatal, $msg) = @_;
		29	warn "got error $msg\n";
		30	$hdl->destroy;
32	$cv->send;	31	$cv->send;
33	},
34	);	32	);
35		33
36	# send some request line	34	# send some request line
37	$handle->push_write ("getinfo\015\012");	35	$hdl->push_write ("getinfo\015\012");
38		36
39	# read the response line	37	# read the response line
40	$handle->push_read (line => sub {	38	$hdl->push_read (line => sub {
41	my ($handle, $line) = @_;	39	my ($hdl, $line) = @_;
42	warn "read line <$line>\n";	40	warn "got line <$line>\n";
43	$cv->send;	41	$cv->send;
44	});	42	});
45		43
46	$cv->recv;	44	$cv->recv;
47		45
48	=head1 DESCRIPTION	46	=head1 DESCRIPTION
49		47
50	This module is a helper module to make it easier to do event-based I/O on	48	This module is a helper module to make it easier to do event-based I/O on
51	filehandles. For utility functions for doing non-blocking connects and accepts	49	filehandles.
52	on sockets see L<AnyEvent::Util>.
53		50
54	The L<AnyEvent::Intro> tutorial contains some well-documented	51	The L<AnyEvent::Intro> tutorial contains some well-documented
55	AnyEvent::Handle examples.	52	AnyEvent::Handle examples.
56		53
57	In the following, when the documentation refers to of "bytes" then this	54	In the following, when the documentation refers to of "bytes" then this
58	means characters. As sysread and syswrite are used for all I/O, their	55	means characters. As sysread and syswrite are used for all I/O, their
59	treatment of characters applies to this module as well.	56	treatment of characters applies to this module as well.
60		57
		58	At the very minimum, you should specify C<fh> or C<connect>, and the
		59	C<on_error> callback.
		60
61	All callbacks will be invoked with the handle object as their first	61	All callbacks will be invoked with the handle object as their first
62	argument.	62	argument.
63		63
64	=head1 METHODS	64	=head1 METHODS
65		65
69		69
70	The constructor supports these arguments (all as C<< key => value >> pairs).	70	The constructor supports these arguments (all as C<< key => value >> pairs).
71		71
72	=over 4	72	=over 4
73		73
74	=item fh => $filehandle [MANDATORY]	74	=item fh => $filehandle [C<fh> or C<connect> MANDATORY]
75		75
76	The filehandle this L<AnyEvent::Handle> object will operate on.	76	The filehandle this L<AnyEvent::Handle> object will operate on.
77
78	NOTE: The filehandle will be set to non-blocking mode (using	77	NOTE: The filehandle will be set to non-blocking mode (using
79	C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in	78	C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in
80	that mode.	79	that mode.
81		80
		81	=item connect => [$host, $service] [C<fh> or C<connect> MANDATORY]
		82
		83	Try to connect to the specified host and service (port), using
		84	C<AnyEvent::Socket::tcp_connect>. The C<$host> additionally becomes the
		85	default C<peername>.
		86
		87	You have to specify either this parameter, or C<fh>, above.
		88
		89	It is possible to push requests on the read and write queues, and modify
		90	properties of the stream, even while AnyEvent::Handle is connecting.
		91
		92	When this parameter is specified, then the C<on_prepare>,
		93	C<on_connect_error> and C<on_connect> callbacks will be called under the
		94	appropriate circumstances:
		95
		96	=over 4
		97
		98	=item on_prepare => $cb->($handle)
		99
		100	This (rarely used) callback is called before a new connection is
		101	attempted, but after the file handle has been created. It could be used to
		102	prepare the file handle with parameters required for the actual connect
		103	(as opposed to settings that can be changed when the connection is already
		104	established).
		105
		106	The return value of this callback should be the connect timeout value in
		107	seconds (or C<0>, or C<undef>, or the empty list, to indicate the default
		108	timeout is to be used).
		109
		110	=item on_connect => $cb->($handle, $host, $port, $retry->())
		111
		112	This callback is called when a connection has been successfully established.
		113
		114	The actual numeric host and port (the socket peername) are passed as
		115	parameters, together with a retry callback.
		116
		117	When, for some reason, the handle is not acceptable, then calling
		118	C<$retry> will continue with the next conenction target (in case of
		119	multi-homed hosts or SRV records there can be multiple connection
		120	endpoints). When it is called then the read and write queues, eof status,
		121	tls status and similar properties of the handle are being reset.
		122
		123	In most cases, ignoring the C<$retry> parameter is the way to go.
		124
		125	=item on_connect_error => $cb->($handle, $message)
		126
		127	This callback is called when the conenction could not be
		128	established. C<$!> will contain the relevant error code, and C<$message> a
		129	message describing it (usually the same as C<"$!">).
		130
		131	If this callback isn't specified, then C<on_error> will be called with a
		132	fatal error instead.
		133
		134	=back
		135
		136	=item on_error => $cb->($handle, $fatal, $message)
		137
		138	This is the error callback, which is called when, well, some error
		139	occured, such as not being able to resolve the hostname, failure to
		140	connect or a read error.
		141
		142	Some errors are fatal (which is indicated by C<$fatal> being true). On
		143	fatal errors the handle object will be destroyed (by a call to C<< ->
		144	destroy >>) after invoking the error callback (which means you are free to
		145	examine the handle object). Examples of fatal errors are an EOF condition
		146	with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. In
		147	cases where the other side can close the connection at their will it is
		148	often easiest to not report C<EPIPE> errors in this callback.
		149
		150	AnyEvent::Handle tries to find an appropriate error code for you to check
		151	against, but in some cases (TLS errors), this does not work well. It is
		152	recommended to always output the C<$message> argument in human-readable
		153	error messages (it's usually the same as C<"$!">).
		154
		155	Non-fatal errors can be retried by simply returning, but it is recommended
		156	to simply ignore this parameter and instead abondon the handle object
		157	when this callback is invoked. Examples of non-fatal errors are timeouts
		158	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
		159
		160	On callback entrance, the value of C<$!> contains the operating system
		161	error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or
		162	C<EPROTO>).
		163
		164	While not mandatory, it is I<highly> recommended to set this callback, as
		165	you will not be notified of errors otherwise. The default simply calls
		166	C<croak>.
		167
		168	=item on_read => $cb->($handle)
		169
		170	This sets the default read callback, which is called when data arrives
		171	and no read request is in the queue (unlike read queue callbacks, this
		172	callback will only be called when at least one octet of data is in the
		173	read buffer).
		174
		175	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
		176	method or access the C<< $handle->{rbuf} >> member directly. Note that you
		177	must not enlarge or modify the read buffer, you can only remove data at
		178	the beginning from it.
		179
		180	When an EOF condition is detected then AnyEvent::Handle will first try to
		181	feed all the remaining data to the queued callbacks and C<on_read> before
		182	calling the C<on_eof> callback. If no progress can be made, then a fatal
		183	error will be raised (with C<$!> set to C<EPIPE>).
		184
		185	Note that, unlike requests in the read queue, an C<on_read> callback
		186	doesn't mean you I<require> some data: if there is an EOF and there
		187	are outstanding read requests then an error will be flagged. With an
		188	C<on_read> callback, the C<on_eof> callback will be invoked.
		189
82	=item on_eof => $cb->($handle)	190	=item on_eof => $cb->($handle)
83		191
84	Set the callback to be called when an end-of-file condition is detected,	192	Set the callback to be called when an end-of-file condition is detected,
85	i.e. in the case of a socket, when the other side has closed the	193	i.e. in the case of a socket, when the other side has closed the
86	connection cleanly.	194	connection cleanly, and there are no outstanding read requests in the
		195	queue (if there are read requests, then an EOF counts as an unexpected
		196	connection close and will be flagged as an error).
87		197
88	For sockets, this just means that the other side has stopped sending data,	198	For sockets, this just means that the other side has stopped sending data,
89	you can still try to write data, and, in fact, one can return from the EOF	199	you can still try to write data, and, in fact, one can return from the EOF
90	callback and continue writing data, as only the read part has been shut	200	callback and continue writing data, as only the read part has been shut
91	down.	201	down.
92		202
93	While not mandatory, it is I<highly> recommended to set an EOF callback,
94	otherwise you might end up with a closed socket while you are still
95	waiting for data.
96
97	If an EOF condition has been detected but no C<on_eof> callback has been	203	If an EOF condition has been detected but no C<on_eof> callback has been
98	set, then a fatal error will be raised with C<$!> set to <0>.	204	set, then a fatal error will be raised with C<$!> set to <0>.
99
100	=item on_error => $cb->($handle, $fatal, $message)
101
102	This is the error callback, which is called when, well, some error
103	occured, such as not being able to resolve the hostname, failure to
104	connect or a read error.
105
106	Some errors are fatal (which is indicated by C<$fatal> being true). On
107	fatal errors the handle object will be shut down and will not be usable
108	(but you are free to look at the current C<< ->rbuf >>). Examples of fatal
109	errors are an EOF condition with active (but unsatisifable) read watchers
110	(C<EPIPE>) or I/O errors.
111
112	AnyEvent::Handle tries to find an appropriate error code for you to check
113	against, but in some cases (TLS errors), this does not work well. It is
114	recommended to always output the C<$message> argument in human-readable
115	error messages (it's usually the same as C<"$!">).
116
117	Non-fatal errors can be retried by simply returning, but it is recommended
118	to simply ignore this parameter and instead abondon the handle object
119	when this callback is invoked. Examples of non-fatal errors are timeouts
120	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
121
122	On callback entrance, the value of C<$!> contains the operating system
123	error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or
124	C<EPROTO>).
125
126	While not mandatory, it is I<highly> recommended to set this callback, as
127	you will not be notified of errors otherwise. The default simply calls
128	C<croak>.
129
130	=item on_read => $cb->($handle)
131
132	This sets the default read callback, which is called when data arrives
133	and no read request is in the queue (unlike read queue callbacks, this
134	callback will only be called when at least one octet of data is in the
135	read buffer).
136
137	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
138	method or access the C<$handle->{rbuf}> member directly. Note that you
139	must not enlarge or modify the read buffer, you can only remove data at
140	the beginning from it.
141
142	When an EOF condition is detected then AnyEvent::Handle will first try to
143	feed all the remaining data to the queued callbacks and C<on_read> before
144	calling the C<on_eof> callback. If no progress can be made, then a fatal
145	error will be raised (with C<$!> set to C<EPIPE>).
146		205
147	=item on_drain => $cb->($handle)	206	=item on_drain => $cb->($handle)
148		207
149	This sets the callback that is called when the write buffer becomes empty	208	This sets the callback that is called when the write buffer becomes empty
150	(or when the callback is set and the buffer is empty already).	209	(or when the callback is set and the buffer is empty already).
…		…
249		308
250	A string used to identify the remote site - usually the DNS hostname	309	A string used to identify the remote site - usually the DNS hostname
251	(I<not> IDN!) used to create the connection, rarely the IP address.	310	(I<not> IDN!) used to create the connection, rarely the IP address.
252		311
253	Apart from being useful in error messages, this string is also used in TLS	312	Apart from being useful in error messages, this string is also used in TLS
254	common name verification (see C<verify_cn> in L<AnyEvent::TLS>).	313	peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This
		314	verification will be skipped when C<peername> is not specified or
		315	C<undef>.
255		316
256	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object	317	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
257		318
258	When this parameter is given, it enables TLS (SSL) mode, that means	319	When this parameter is given, it enables TLS (SSL) mode, that means
259	AnyEvent will start a TLS handshake as soon as the conenction has been	320	AnyEvent will start a TLS handshake as soon as the conenction has been
…		…
296		357
297	Instead of an object, you can also specify a hash reference with C<< key	358	Instead of an object, you can also specify a hash reference with C<< key
298	=> value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a	359	=> value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a
299	new TLS context object.	360	new TLS context object.
300		361
		362	=item on_starttls => $cb->($handle, $success[, $error_message])
		363
		364	This callback will be invoked when the TLS/SSL handshake has finished. If
		365	C<$success> is true, then the TLS handshake succeeded, otherwise it failed
		366	(C<on_stoptls> will not be called in this case).
		367
		368	The session in C<< $handle->{tls} >> can still be examined in this
		369	callback, even when the handshake was not successful.
		370
		371	TLS handshake failures will not cause C<on_error> to be invoked when this
		372	callback is in effect, instead, the error message will be passed to C<on_starttls>.
		373
		374	Without this callback, handshake failures lead to C<on_error> being
		375	called, as normal.
		376
		377	Note that you cannot call C<starttls> right again in this callback. If you
		378	need to do that, start an zero-second timer instead whose callback can
		379	then call C<< ->starttls >> again.
		380
		381	=item on_stoptls => $cb->($handle)
		382
		383	When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is
		384	set, then it will be invoked after freeing the TLS session. If it is not,
		385	then a TLS shutdown condition will be treated like a normal EOF condition
		386	on the handle.
		387
		388	The session in C<< $handle->{tls} >> can still be examined in this
		389	callback.
		390
		391	This callback will only be called on TLS shutdowns, not when the
		392	underlying handle signals EOF.
		393
301	=item json => JSON or JSON::XS object	394	=item json => JSON or JSON::XS object
302		395
303	This is the json coder object used by the C<json> read and write types.	396	This is the json coder object used by the C<json> read and write types.
304		397
305	If you don't supply it, then AnyEvent::Handle will create and use a	398	If you don't supply it, then AnyEvent::Handle will create and use a
…		…
315		408
316	sub new {	409	sub new {
317	my $class = shift;	410	my $class = shift;
318	my $self = bless { @_ }, $class;	411	my $self = bless { @_ }, $class;
319		412
320	$self->{fh} or Carp::croak "mandatory argument fh is missing";	413	if ($self->{fh}) {
		414	$self->_start;
		415	return unless $self->{fh}; # could be gone by now
		416
		417	} elsif ($self->{connect}) {
		418	require AnyEvent::Socket;
		419
		420	$self->{peername} = $self->{connect}[0]
		421	unless exists $self->{peername};
		422
		423	$self->{_skip_drain_rbuf} = 1;
		424
		425	{
		426	Scalar::Util::weaken (my $self = $self);
		427
		428	$self->{_connect} =
		429	AnyEvent::Socket::tcp_connect (
		430	$self->{connect}[0],
		431	$self->{connect}[1],
		432	sub {
		433	my ($fh, $host, $port, $retry) = @_;
		434
		435	if ($fh) {
		436	$self->{fh} = $fh;
		437
		438	delete $self->{_skip_drain_rbuf};
		439	$self->_start;
		440
		441	$self->{on_connect}
		442	and $self->{on_connect}($self, $host, $port, sub {
		443	delete @$self{qw(fh _tw _ww _rw _eof _queue rbuf _wbuf tls _tls_rbuf _tls_wbuf)};
		444	$self->{_skip_drain_rbuf} = 1;
		445	&$retry;
		446	});
		447
		448	} else {
		449	if ($self->{on_connect_error}) {
		450	$self->{on_connect_error}($self, "$!");
		451	$self->destroy;
		452	} else {
		453	$self->_error ($!, 1);
		454	}
		455	}
		456	},
		457	sub {
		458	local $self->{fh} = $_[0];
		459
		460	$self->{on_prepare}
		461	? $self->{on_prepare}->($self)
		462	: ()
		463	}
		464	);
		465	}
		466
		467	} else {
		468	Carp::croak "AnyEvent::Handle: either an existing fh or the connect parameter must be specified";
		469	}
		470
		471	$self
		472	}
		473
		474	sub _start {
		475	my ($self) = @_;
321		476
322	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;	477	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;
323		478
324	$self->{_activity} = AnyEvent->now;	479	$self->{_activity} = AnyEvent->now;
325	$self->_timeout;	480	$self->_timeout;
…		…
327	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};	482	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};
328		483
329	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})	484	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})
330	if $self->{tls};	485	if $self->{tls};
331		486
332	$self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain};	487	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};
333		488
334	$self->start_read	489	$self->start_read
335	if $self->{on_read};	490	if $self->{on_read} \|\| @{ $self->{_queue} };
336		491
337	$self->{fh} && $self	492	$self->_drain_wbuf;
338	}	493	}
339		494
340	sub _shutdown {	495	#sub _shutdown {
341	my ($self) = @_;	496	# my ($self) = @_;
342		497	#
343	delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)};	498	# delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)};
344	$self->{_eof} = 1; # tell starttls et. al to stop trying	499	# $self->{_eof} = 1; # tell starttls et. al to stop trying
345		500	#
346	&_freetls;	501	# &_freetls;
347	}	502	#}
348		503
349	sub _error {	504	sub _error {
350	my ($self, $errno, $fatal, $message) = @_;	505	my ($self, $errno, $fatal, $message) = @_;
351		506
352	$self->_shutdown
353	if $fatal;
354
355	$! = $errno;	507	$! = $errno;
356	$message \|\|= "$!";	508	$message \|\|= "$!";
357		509
358	if ($self->{on_error}) {	510	if ($self->{on_error}) {
359	$self->{on_error}($self, $fatal, $message);	511	$self->{on_error}($self, $fatal, $message);
		512	$self->destroy if $fatal;
360	} elsif ($self->{fh}) {	513	} elsif ($self->{fh}) {
		514	$self->destroy;
361	Carp::croak "AnyEvent::Handle uncaught error: $message";	515	Carp::croak "AnyEvent::Handle uncaught error: $message";
362	}	516	}
363	}	517	}
364		518
365	=item $fh = $handle->fh	519	=item $fh = $handle->fh
…		…
423	sub no_delay {	577	sub no_delay {
424	$_[0]{no_delay} = $_[1];	578	$_[0]{no_delay} = $_[1];
425		579
426	eval {	580	eval {
427	local $SIG{__DIE__};	581	local $SIG{__DIE__};
428	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1];	582	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]
		583	if $_[0]{fh};
429	};	584	};
		585	}
		586
		587	=item $handle->on_starttls ($cb)
		588
		589	Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument).
		590
		591	=cut
		592
		593	sub on_starttls {
		594	$_[0]{on_starttls} = $_[1];
		595	}
		596
		597	=item $handle->on_stoptls ($cb)
		598
		599	Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument).
		600
		601	=cut
		602
		603	sub on_starttls {
		604	$_[0]{on_stoptls} = $_[1];
430	}	605	}
431		606
432	#############################################################################	607	#############################################################################
433		608
434	=item $handle->timeout ($seconds)	609	=item $handle->timeout ($seconds)
…		…
447	# reset the timeout watcher, as neccessary	622	# reset the timeout watcher, as neccessary
448	# also check for time-outs	623	# also check for time-outs
449	sub _timeout {	624	sub _timeout {
450	my ($self) = @_;	625	my ($self) = @_;
451		626
452	if ($self->{timeout}) {	627	if ($self->{timeout} && $self->{fh}) {
453	my $NOW = AnyEvent->now;	628	my $NOW = AnyEvent->now;
454		629
455	# when would the timeout trigger?	630	# when would the timeout trigger?
456	my $after = $self->{_activity} + $self->{timeout} - $NOW;	631	my $after = $self->{_activity} + $self->{timeout} - $NOW;
457		632
…		…
460	$self->{_activity} = $NOW;	635	$self->{_activity} = $NOW;
461		636
462	if ($self->{on_timeout}) {	637	if ($self->{on_timeout}) {
463	$self->{on_timeout}($self);	638	$self->{on_timeout}($self);
464	} else {	639	} else {
465	$self->_error (&Errno::ETIMEDOUT);	640	$self->_error (Errno::ETIMEDOUT);
466	}	641	}
467		642
468	# callback could have changed timeout value, optimise	643	# callback could have changed timeout value, optimise
469	return unless $self->{timeout};	644	return unless $self->{timeout};
470		645
…		…
533	Scalar::Util::weaken $self;	708	Scalar::Util::weaken $self;
534		709
535	my $cb = sub {	710	my $cb = sub {
536	my $len = syswrite $self->{fh}, $self->{wbuf};	711	my $len = syswrite $self->{fh}, $self->{wbuf};
537		712
538	if ($len >= 0) {	713	if (defined $len) {
539	substr $self->{wbuf}, 0, $len, "";	714	substr $self->{wbuf}, 0, $len, "";
540		715
541	$self->{_activity} = AnyEvent->now;	716	$self->{_activity} = AnyEvent->now;
542		717
543	$self->{on_drain}($self)	718	$self->{on_drain}($self)
…		…
575	->($self, @_);	750	->($self, @_);
576	}	751	}
577		752
578	if ($self->{tls}) {	753	if ($self->{tls}) {
579	$self->{_tls_wbuf} .= $_[0];	754	$self->{_tls_wbuf} .= $_[0];
580		755	&_dotls ($self) if $self->{fh};
581	&_dotls ($self);
582	} else {	756	} else {
583	$self->{wbuf} .= $_[0];	757	$self->{wbuf} .= $_[0];
584	$self->_drain_wbuf;	758	$self->_drain_wbuf if $self->{fh};
585	}	759	}
586	}	760	}
587		761
588	=item $handle->push_write (type => @args)	762	=item $handle->push_write (type => @args)
589		763
…		…
683		857
684	=item $handle->push_shutdown	858	=item $handle->push_shutdown
685		859
686	Sometimes you know you want to close the socket after writing your data	860	Sometimes you know you want to close the socket after writing your data
687	before it was actually written. One way to do that is to replace your	861	before it was actually written. One way to do that is to replace your
688	C<on_drain> handler by a callback that shuts down the socket. This method	862	C<on_drain> handler by a callback that shuts down the socket (and set
689	is a shorthand for just that, and replaces the C<on_drain> callback with:	863	C<low_water_mark> to C<0>). This method is a shorthand for just that, and
		864	replaces the C<on_drain> callback with:
690		865
691	sub { shutdown $_[0]{fh}, 1 } # for push_shutdown	866	sub { shutdown $_[0]{fh}, 1 } # for push_shutdown
692		867
693	This simply shuts down the write side and signals an EOF condition to the	868	This simply shuts down the write side and signals an EOF condition to the
694	the peer.	869	the peer.
…		…
697	afterwards. This is the cleanest way to close a connection.	872	afterwards. This is the cleanest way to close a connection.
698		873
699	=cut	874	=cut
700		875
701	sub push_shutdown {	876	sub push_shutdown {
		877	my ($self) = @_;
		878
		879	delete $self->{low_water_mark};
702	$_[0]->{on_drain} = sub { shutdown $_[0]{fh}, 1 };	880	$self->on_drain (sub { shutdown $_[0]{fh}, 1 });
703	}	881	}
704		882
705	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	883	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
706		884
707	This function (not method) lets you add your own types to C<push_write>.	885	This function (not method) lets you add your own types to C<push_write>.
…		…
802	=cut	980	=cut
803		981
804	sub _drain_rbuf {	982	sub _drain_rbuf {
805	my ($self) = @_;	983	my ($self) = @_;
806		984
		985	# avoid recursion
		986	return if exists $self->{_skip_drain_rbuf};
807	local $self->{_in_drain} = 1;	987	local $self->{_skip_drain_rbuf} = 1;
808		988
809	if (	989	if (
810	defined $self->{rbuf_max}	990	defined $self->{rbuf_max}
811	&& $self->{rbuf_max} < length $self->{rbuf}	991	&& $self->{rbuf_max} < length $self->{rbuf}
812	) {	992	) {
813	$self->_error (&Errno::ENOSPC, 1), return;	993	$self->_error (Errno::ENOSPC, 1), return;
814	}	994	}
815		995
816	while () {	996	while () {
817	# we need to use a separate tls read buffer, as we must not receive data while	997	# we need to use a separate tls read buffer, as we must not receive data while
818	# we are draining the buffer, and this can only happen with TLS.	998	# we are draining the buffer, and this can only happen with TLS.
…		…
822		1002
823	if (my $cb = shift @{ $self->{_queue} }) {	1003	if (my $cb = shift @{ $self->{_queue} }) {
824	unless ($cb->($self)) {	1004	unless ($cb->($self)) {
825	if ($self->{_eof}) {	1005	if ($self->{_eof}) {
826	# no progress can be made (not enough data and no data forthcoming)	1006	# no progress can be made (not enough data and no data forthcoming)
827	$self->_error (&Errno::EPIPE, 1), return;	1007	$self->_error (Errno::EPIPE, 1), return;
828	}	1008	}
829		1009
830	unshift @{ $self->{_queue} }, $cb;	1010	unshift @{ $self->{_queue} }, $cb;
831	last;	1011	last;
832	}	1012	}
…		…
840	&& !@{ $self->{_queue} } # and the queue is still empty	1020	&& !@{ $self->{_queue} } # and the queue is still empty
841	&& $self->{on_read} # but we still have on_read	1021	&& $self->{on_read} # but we still have on_read
842	) {	1022	) {
843	# no further data will arrive	1023	# no further data will arrive
844	# so no progress can be made	1024	# so no progress can be made
845	$self->_error (&Errno::EPIPE, 1), return	1025	$self->_error (Errno::EPIPE, 1), return
846	if $self->{_eof};	1026	if $self->{_eof};
847		1027
848	last; # more data might arrive	1028	last; # more data might arrive
849	}	1029	}
850	} else {	1030	} else {
…		…
856		1036
857	if ($self->{_eof}) {	1037	if ($self->{_eof}) {
858	if ($self->{on_eof}) {	1038	if ($self->{on_eof}) {
859	$self->{on_eof}($self)	1039	$self->{on_eof}($self)
860	} else {	1040	} else {
861	$self->_error (0, 1);	1041	$self->_error (0, 1, "Unexpected end-of-file");
862	}	1042	}
863	}	1043	}
864		1044
865	# may need to restart read watcher	1045	# may need to restart read watcher
866	unless ($self->{_rw}) {	1046	unless ($self->{_rw}) {
…		…
879		1059
880	sub on_read {	1060	sub on_read {
881	my ($self, $cb) = @_;	1061	my ($self, $cb) = @_;
882		1062
883	$self->{on_read} = $cb;	1063	$self->{on_read} = $cb;
884	$self->_drain_rbuf if $cb && !$self->{_in_drain};	1064	$self->_drain_rbuf if $cb;
885	}	1065	}
886		1066
887	=item $handle->rbuf	1067	=item $handle->rbuf
888		1068
889	Returns the read buffer (as a modifiable lvalue).	1069	Returns the read buffer (as a modifiable lvalue).
…		…
941	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	1121	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
942	->($self, $cb, @_);	1122	->($self, $cb, @_);
943	}	1123	}
944		1124
945	push @{ $self->{_queue} }, $cb;	1125	push @{ $self->{_queue} }, $cb;
946	$self->_drain_rbuf unless $self->{_in_drain};	1126	$self->_drain_rbuf;
947	}	1127	}
948		1128
949	sub unshift_read {	1129	sub unshift_read {
950	my $self = shift;	1130	my $self = shift;
951	my $cb = pop;	1131	my $cb = pop;
…		…
957	->($self, $cb, @_);	1137	->($self, $cb, @_);
958	}	1138	}
959		1139
960		1140
961	unshift @{ $self->{_queue} }, $cb;	1141	unshift @{ $self->{_queue} }, $cb;
962	$self->_drain_rbuf unless $self->{_in_drain};	1142	$self->_drain_rbuf;
963	}	1143	}
964		1144
965	=item $handle->push_read (type => @args, $cb)	1145	=item $handle->push_read (type => @args, $cb)
966		1146
967	=item $handle->unshift_read (type => @args, $cb)	1147	=item $handle->unshift_read (type => @args, $cb)
…		…
1100	return 1;	1280	return 1;
1101	}	1281	}
1102		1282
1103	# reject	1283	# reject
1104	if ($reject && $$rbuf =~ $reject) {	1284	if ($reject && $$rbuf =~ $reject) {
1105	$self->_error (&Errno::EBADMSG);	1285	$self->_error (Errno::EBADMSG);
1106	}	1286	}
1107		1287
1108	# skip	1288	# skip
1109	if ($skip && $$rbuf =~ $skip) {	1289	if ($skip && $$rbuf =~ $skip) {
1110	$data .= substr $$rbuf, 0, $+[0], "";	1290	$data .= substr $$rbuf, 0, $+[0], "";
…		…
1126	my ($self, $cb) = @_;	1306	my ($self, $cb) = @_;
1127		1307
1128	sub {	1308	sub {
1129	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {	1309	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {
1130	if ($_[0]{rbuf} =~ /[^0-9]/) {	1310	if ($_[0]{rbuf} =~ /[^0-9]/) {
1131	$self->_error (&Errno::EBADMSG);	1311	$self->_error (Errno::EBADMSG);
1132	}	1312	}
1133	return;	1313	return;
1134	}	1314	}
1135		1315
1136	my $len = $1;	1316	my $len = $1;
…		…
1139	my $string = $_[1];	1319	my $string = $_[1];
1140	$_[0]->unshift_read (chunk => 1, sub {	1320	$_[0]->unshift_read (chunk => 1, sub {
1141	if ($_[1] eq ",") {	1321	if ($_[1] eq ",") {
1142	$cb->($_[0], $string);	1322	$cb->($_[0], $string);
1143	} else {	1323	} else {
1144	$self->_error (&Errno::EBADMSG);	1324	$self->_error (Errno::EBADMSG);
1145	}	1325	}
1146	});	1326	});
1147	});	1327	});
1148		1328
1149	1	1329	1
…		…
1216	=cut	1396	=cut
1217		1397
1218	register_read_type json => sub {	1398	register_read_type json => sub {
1219	my ($self, $cb) = @_;	1399	my ($self, $cb) = @_;
1220		1400
1221	require JSON;	1401	my $json = $self->{json} \|\|=
		1402	eval { require JSON::XS; JSON::XS->new->utf8 }
		1403	\|\| do { require JSON; JSON->new->utf8 };
1222		1404
1223	my $data;	1405	my $data;
1224	my $rbuf = \$self->{rbuf};	1406	my $rbuf = \$self->{rbuf};
1225
1226	my $json = $self->{json} \|\|= JSON->new->utf8;
1227		1407
1228	sub {	1408	sub {
1229	my $ref = eval { $json->incr_parse ($self->{rbuf}) };	1409	my $ref = eval { $json->incr_parse ($self->{rbuf}) };
1230		1410
1231	if ($ref) {	1411	if ($ref) {
…		…
1239	$json->incr_skip;	1419	$json->incr_skip;
1240		1420
1241	$self->{rbuf} = $json->incr_text;	1421	$self->{rbuf} = $json->incr_text;
1242	$json->incr_text = "";	1422	$json->incr_text = "";
1243		1423
1244	$self->_error (&Errno::EBADMSG);	1424	$self->_error (Errno::EBADMSG);
1245		1425
1246	()	1426	()
1247	} else {	1427	} else {
1248	$self->{rbuf} = "";	1428	$self->{rbuf} = "";
1249		1429
…		…
1286	# read remaining chunk	1466	# read remaining chunk
1287	$_[0]->unshift_read (chunk => $len, sub {	1467	$_[0]->unshift_read (chunk => $len, sub {
1288	if (my $ref = eval { Storable::thaw ($_[1]) }) {	1468	if (my $ref = eval { Storable::thaw ($_[1]) }) {
1289	$cb->($_[0], $ref);	1469	$cb->($_[0], $ref);
1290	} else {	1470	} else {
1291	$self->_error (&Errno::EBADMSG);	1471	$self->_error (Errno::EBADMSG);
1292	}	1472	}
1293	});	1473	});
1294	}	1474	}
1295		1475
1296	1	1476	1
…		…
1360	if ($self->{tls}) {	1540	if ($self->{tls}) {
1361	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);	1541	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);
1362		1542
1363	&_dotls ($self);	1543	&_dotls ($self);
1364	} else {	1544	} else {
1365	$self->_drain_rbuf unless $self->{_in_drain};	1545	$self->_drain_rbuf;
1366	}	1546	}
1367		1547
1368	} elsif (defined $len) {	1548	} elsif (defined $len) {
1369	delete $self->{_rw};	1549	delete $self->{_rw};
1370	$self->{_eof} = 1;	1550	$self->{_eof} = 1;
1371	$self->_drain_rbuf unless $self->{_in_drain};	1551	$self->_drain_rbuf;
1372		1552
1373	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	1553	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
1374	return $self->_error ($!, 1);	1554	return $self->_error ($!, 1);
1375	}	1555	}
1376	});	1556	});
1377	}	1557	}
1378	}	1558	}
1379		1559
1380	our $ERROR_SYSCALL;	1560	our $ERROR_SYSCALL;
1381	our $ERROR_WANT_READ;	1561	our $ERROR_WANT_READ;
1382	our $ERROR_ZERO_RETURN;
1383		1562
1384	sub _tls_error {	1563	sub _tls_error {
1385	my ($self, $err) = @_;	1564	my ($self, $err) = @_;
1386	warn "$err,$!\n";#d#
1387		1565
1388	return $self->_error ($!, 1)	1566	return $self->_error ($!, 1)
1389	if $err == Net::SSLeay::ERROR_SYSCALL ();	1567	if $err == Net::SSLeay::ERROR_SYSCALL ();
1390		1568
		1569	my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ());
		1570
		1571	# reduce error string to look less scary
		1572	$err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /;
		1573
		1574	if ($self->{_on_starttls}) {
		1575	(delete $self->{_on_starttls})->($self, undef, $err);
		1576	&_freetls;
		1577	} else {
		1578	&_freetls;
1391	$self->_error (&Errno::EPROTO, 1,	1579	$self->_error (Errno::EPROTO, 1, $err);
1392	Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ()));	1580	}
1393	}	1581	}
1394		1582
1395	# poll the write BIO and send the data if applicable	1583	# poll the write BIO and send the data if applicable
1396	# also decode read data if possible	1584	# also decode read data if possible
1397	# this is basiclaly our TLS state machine	1585	# this is basiclaly our TLS state machine
…		…
1408	}	1596	}
1409		1597
1410	$tmp = Net::SSLeay::get_error ($self->{tls}, $tmp);	1598	$tmp = Net::SSLeay::get_error ($self->{tls}, $tmp);
1411	return $self->_tls_error ($tmp)	1599	return $self->_tls_error ($tmp)
1412	if $tmp != $ERROR_WANT_READ	1600	if $tmp != $ERROR_WANT_READ
1413	&& ($tmp != $ERROR_SYSCALL \|\| $!)	1601	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1414	&& $tmp != $ERROR_ZERO_RETURN;
1415	}	1602	}
1416		1603
1417	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {	1604	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {
1418	unless (length $tmp) {	1605	unless (length $tmp) {
1419	# let's treat SSL-eof as we treat normal EOF	1606	$self->{_on_starttls}
1420	delete $self->{_rw};	1607	and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ???
1421	$self->{_eof} = 1;
1422	&_freetls;	1608	&_freetls;
		1609
		1610	if ($self->{on_stoptls}) {
		1611	$self->{on_stoptls}($self);
		1612	return;
		1613	} else {
		1614	# let's treat SSL-eof as we treat normal EOF
		1615	delete $self->{_rw};
		1616	$self->{_eof} = 1;
		1617	}
1423	}	1618	}
1424		1619
1425	$self->{_tls_rbuf} .= $tmp;	1620	$self->{_tls_rbuf} .= $tmp;
1426	$self->_drain_rbuf unless $self->{_in_drain};	1621	$self->_drain_rbuf;
1427	$self->{tls} or return; # tls session might have gone away in callback	1622	$self->{tls} or return; # tls session might have gone away in callback
1428	}	1623	}
1429		1624
1430	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);	1625	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);
1431	return $self->_tls_error ($tmp)	1626	return $self->_tls_error ($tmp)
1432	if $tmp != $ERROR_WANT_READ	1627	if $tmp != $ERROR_WANT_READ
1433	&& ($tmp != $ERROR_SYSCALL \|\| $!)	1628	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1434	&& $tmp != $ERROR_ZERO_RETURN;
1435		1629
1436	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {	1630	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {
1437	$self->{wbuf} .= $tmp;	1631	$self->{wbuf} .= $tmp;
1438	$self->_drain_wbuf;	1632	$self->_drain_wbuf;
1439	}	1633	}
		1634
		1635	$self->{_on_starttls}
		1636	and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK ()
		1637	and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established");
1440	}	1638	}
1441		1639
1442	=item $handle->starttls ($tls[, $tls_ctx])	1640	=item $handle->starttls ($tls[, $tls_ctx])
1443		1641
1444	Instead of starting TLS negotiation immediately when the AnyEvent::Handle	1642	Instead of starting TLS negotiation immediately when the AnyEvent::Handle
1445	object is created, you can also do that at a later time by calling	1643	object is created, you can also do that at a later time by calling
1446	C<starttls>.	1644	C<starttls>.
		1645
		1646	Starting TLS is currently an asynchronous operation - when you push some
		1647	write data and then call C<< ->starttls >> then TLS negotiation will start
		1648	immediately, after which the queued write data is then sent.
1447		1649
1448	The first argument is the same as the C<tls> constructor argument (either	1650	The first argument is the same as the C<tls> constructor argument (either
1449	C<"connect">, C<"accept"> or an existing Net::SSLeay object).	1651	C<"connect">, C<"accept"> or an existing Net::SSLeay object).
1450		1652
1451	The second argument is the optional C<AnyEvent::TLS> object that is used	1653	The second argument is the optional C<AnyEvent::TLS> object that is used
…		…
1456	The TLS connection object will end up in C<< $handle->{tls} >>, the TLS	1658	The TLS connection object will end up in C<< $handle->{tls} >>, the TLS
1457	context in C<< $handle->{tls_ctx} >> after this call and can be used or	1659	context in C<< $handle->{tls_ctx} >> after this call and can be used or
1458	changed to your liking. Note that the handshake might have already started	1660	changed to your liking. Note that the handshake might have already started
1459	when this function returns.	1661	when this function returns.
1460		1662
1461	If it an error to start a TLS handshake more than once per	1663	Due to bugs in OpenSSL, it might or might not be possible to do multiple
1462	AnyEvent::Handle object (this is due to bugs in OpenSSL).	1664	handshakes on the same stream. Best do not attempt to use the stream after
		1665	stopping TLS.
1463		1666
1464	=cut	1667	=cut
		1668
		1669	our %TLS_CACHE; #TODO not yet documented, should we?
1465		1670
1466	sub starttls {	1671	sub starttls {
1467	my ($self, $ssl, $ctx) = @_;	1672	my ($self, $tls, $ctx) = @_;
		1673
		1674	Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught"
		1675	if $self->{tls};
		1676
		1677	$self->{tls} = $tls;
		1678	$self->{tls_ctx} = $ctx if @_ > 2;
		1679
		1680	return unless $self->{fh};
1468		1681
1469	require Net::SSLeay;	1682	require Net::SSLeay;
1470		1683
1471	Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object"
1472	if $self->{tls};
1473
1474	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();	1684	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();
1475	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();	1685	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();
1476	$ERROR_ZERO_RETURN = Net::SSLeay::ERROR_ZERO_RETURN ();
1477		1686
		1687	$tls = $self->{tls};
1478	$ctx \|\|= $self->{tls_ctx};	1688	$ctx = $self->{tls_ctx};
		1689
		1690	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session
1479		1691
1480	if ("HASH" eq ref $ctx) {	1692	if ("HASH" eq ref $ctx) {
1481	require AnyEvent::TLS;	1693	require AnyEvent::TLS;
1482		1694
1483	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context	1695	if ($ctx->{cache}) {
		1696	my $key = $ctx+0;
		1697	$ctx = $TLS_CACHE{$key} \|\|= new AnyEvent::TLS %$ctx;
		1698	} else {
1484	$ctx = new AnyEvent::TLS %$ctx;	1699	$ctx = new AnyEvent::TLS %$ctx;
		1700	}
1485	}	1701	}
1486		1702
1487	$self->{tls_ctx} = $ctx \|\| TLS_CTX ();	1703	$self->{tls_ctx} = $ctx \|\| TLS_CTX ();
1488	$self->{tls} = $ssl = $self->{tls_ctx}->_get_session ($ssl, $self, $self->{peername});	1704	$self->{tls} = $tls = $self->{tls_ctx}->_get_session ($tls, $self, $self->{peername});
1489		1705
1490	# basically, this is deep magic (because SSL_read should have the same issues)	1706	# basically, this is deep magic (because SSL_read should have the same issues)
1491	# but the openssl maintainers basically said: "trust us, it just works".	1707	# but the openssl maintainers basically said: "trust us, it just works".
1492	# (unfortunately, we have to hardcode constants because the abysmally misdesigned	1708	# (unfortunately, we have to hardcode constants because the abysmally misdesigned
1493	# and mismaintained ssleay-module doesn't even offer them).	1709	# and mismaintained ssleay-module doesn't even offer them).
…		…
1500	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to	1716	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to
1501	# have identity issues in that area.	1717	# have identity issues in that area.
1502	# Net::SSLeay::CTX_set_mode ($ssl,	1718	# Net::SSLeay::CTX_set_mode ($ssl,
1503	# (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)	1719	# (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)
1504	# \| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));	1720	# \| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));
1505	Net::SSLeay::CTX_set_mode ($ssl, 1\|2);	1721	Net::SSLeay::CTX_set_mode ($tls, 1\|2);
1506		1722
1507	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1723	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1508	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1724	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1509		1725
1510	Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});	1726	Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio});
		1727
		1728	$self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) }
		1729	if $self->{on_starttls};
1511		1730
1512	&_dotls; # need to trigger the initial handshake	1731	&_dotls; # need to trigger the initial handshake
1513	$self->start_read; # make sure we actually do read	1732	$self->start_read; # make sure we actually do read
1514	}	1733	}
1515		1734
1516	=item $handle->stoptls	1735	=item $handle->stoptls
1517		1736
1518	Shuts down the SSL connection - this makes a proper EOF handshake by	1737	Shuts down the SSL connection - this makes a proper EOF handshake by
1519	sending a close notify to the other side, but since OpenSSL doesn't	1738	sending a close notify to the other side, but since OpenSSL doesn't
1520	support non-blocking shut downs, it is not possible to re-use the stream	1739	support non-blocking shut downs, it is not guarenteed that you can re-use
1521	afterwards.	1740	the stream afterwards.
1522		1741
1523	=cut	1742	=cut
1524		1743
1525	sub stoptls {	1744	sub stoptls {
1526	my ($self) = @_;	1745	my ($self) = @_;
…		…
1528	if ($self->{tls}) {	1747	if ($self->{tls}) {
1529	Net::SSLeay::shutdown ($self->{tls});	1748	Net::SSLeay::shutdown ($self->{tls});
1530		1749
1531	&_dotls;	1750	&_dotls;
1532		1751
1533	# we don't give a shit. no, we do, but we can't. no...	1752	# # we don't give a shit. no, we do, but we can't. no...#d#
1534	# we, we... have to use openssl :/	1753	# # we, we... have to use openssl :/#d#
1535	&_freetls;	1754	# &_freetls;#d#
1536	}	1755	}
1537	}	1756	}
1538		1757
1539	sub _freetls {	1758	sub _freetls {
1540	my ($self) = @_;	1759	my ($self) = @_;
1541		1760
1542	return unless $self->{tls};	1761	return unless $self->{tls};
1543		1762
1544	$self->{tls_ctx}->_put_session (delete $self->{tls});	1763	$self->{tls_ctx}->_put_session (delete $self->{tls})
		1764	if ref $self->{tls};
1545		1765
1546	delete @$self{qw(_rbio _wbio _tls_wbuf)};	1766	delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)};
1547	}	1767	}
1548		1768
1549	sub DESTROY {	1769	sub DESTROY {
1550	my ($self) = @_;	1770	my ($self) = @_;
1551		1771
1552	&_freetls;	1772	&_freetls;
1553		1773
1554	my $linger = exists $self->{linger} ? $self->{linger} : 3600;	1774	my $linger = exists $self->{linger} ? $self->{linger} : 3600;
1555		1775
1556	if ($linger && length $self->{wbuf}) {	1776	if ($linger && length $self->{wbuf} && $self->{fh}) {
1557	my $fh = delete $self->{fh};	1777	my $fh = delete $self->{fh};
1558	my $wbuf = delete $self->{wbuf};	1778	my $wbuf = delete $self->{wbuf};
1559		1779
1560	my @linger;	1780	my @linger;
1561		1781
…		…
1575	}	1795	}
1576		1796
1577	=item $handle->destroy	1797	=item $handle->destroy
1578		1798
1579	Shuts down the handle object as much as possible - this call ensures that	1799	Shuts down the handle object as much as possible - this call ensures that
1580	no further callbacks will be invoked and resources will be freed as much	1800	no further callbacks will be invoked and as many resources as possible
1581	as possible. You must not call any methods on the object afterwards.	1801	will be freed. You must not call any methods on the object afterwards.
1582		1802
1583	Normally, you can just "forget" any references to an AnyEvent::Handle	1803	Normally, you can just "forget" any references to an AnyEvent::Handle
1584	object and it will simply shut down. This works in fatal error and EOF	1804	object and it will simply shut down. This works in fatal error and EOF
1585	callbacks, as well as code outside. It does I<NOT> work in a read or write	1805	callbacks, as well as code outside. It does I<NOT> work in a read or write
1586	callback, so when you want to destroy the AnyEvent::Handle object from	1806	callback, so when you want to destroy the AnyEvent::Handle object from
1587	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in	1807	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in
1588	that case.	1808	that case.
1589		1809
		1810	Destroying the handle object in this way has the advantage that callbacks
		1811	will be removed as well, so if those are the only reference holders (as
		1812	is common), then one doesn't need to do anything special to break any
		1813	reference cycles.
		1814
1590	The handle might still linger in the background and write out remaining	1815	The handle might still linger in the background and write out remaining
1591	data, as specified by the C<linger> option, however.	1816	data, as specified by the C<linger> option, however.
1592		1817
1593	=cut	1818	=cut
1594		1819
…		…
1661		1886
1662	$handle->on_read (sub { });	1887	$handle->on_read (sub { });
1663	$handle->on_eof (undef);	1888	$handle->on_eof (undef);
1664	$handle->on_error (sub {	1889	$handle->on_error (sub {
1665	my $data = delete $_[0]{rbuf};	1890	my $data = delete $_[0]{rbuf};
1666	undef $handle;
1667	});	1891	});
1668		1892
1669	The reason to use C<on_error> is that TCP connections, due to latencies	1893	The reason to use C<on_error> is that TCP connections, due to latencies
1670	and packets loss, might get closed quite violently with an error, when in	1894	and packets loss, might get closed quite violently with an error, when in
1671	fact, all data has been received.	1895	fact, all data has been received.
…		…
1687	$handle->on_drain (sub {	1911	$handle->on_drain (sub {
1688	warn "all data submitted to the kernel\n";	1912	warn "all data submitted to the kernel\n";
1689	undef $handle;	1913	undef $handle;
1690	});	1914	});
1691		1915
		1916	If you just want to queue some data and then signal EOF to the other side,
		1917	consider using C<< ->push_shutdown >> instead.
		1918
		1919	=item I want to contact a TLS/SSL server, I don't care about security.
		1920
		1921	If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS,
		1922	simply connect to it and then create the AnyEvent::Handle with the C<tls>
		1923	parameter:
		1924
		1925	tcp_connect $host, $port, sub {
		1926	my ($fh) = @_;
		1927
		1928	my $handle = new AnyEvent::Handle
		1929	fh => $fh,
		1930	tls => "connect",
		1931	on_error => sub { ... };
		1932
		1933	$handle->push_write (...);
		1934	};
		1935
		1936	=item I want to contact a TLS/SSL server, I do care about security.
		1937
		1938	Then you should additionally enable certificate verification, including
		1939	peername verification, if the protocol you use supports it (see
		1940	L<AnyEvent::TLS>, C<verify_peername>).
		1941
		1942	E.g. for HTTPS:
		1943
		1944	tcp_connect $host, $port, sub {
		1945	my ($fh) = @_;
		1946
		1947	my $handle = new AnyEvent::Handle
		1948	fh => $fh,
		1949	peername => $host,
		1950	tls => "connect",
		1951	tls_ctx => { verify => 1, verify_peername => "https" },
		1952	...
		1953
		1954	Note that you must specify the hostname you connected to (or whatever
		1955	"peername" the protocol needs) as the C<peername> argument, otherwise no
		1956	peername verification will be done.
		1957
		1958	The above will use the system-dependent default set of trusted CA
		1959	certificates. If you want to check against a specific CA, add the
		1960	C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>:
		1961
		1962	tls_ctx => {
		1963	verify => 1,
		1964	verify_peername => "https",
		1965	ca_file => "my-ca-cert.pem",
		1966	},
		1967
		1968	=item I want to create a TLS/SSL server, how do I do that?
		1969
		1970	Well, you first need to get a server certificate and key. You have
		1971	three options: a) ask a CA (buy one, use cacert.org etc.) b) create a
		1972	self-signed certificate (cheap. check the search engine of your choice,
		1973	there are many tutorials on the net) or c) make your own CA (tinyca2 is a
		1974	nice program for that purpose).
		1975
		1976	Then create a file with your private key (in PEM format, see
		1977	L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The
		1978	file should then look like this:
		1979
		1980	-----BEGIN RSA PRIVATE KEY-----
		1981	...header data
		1982	... lots of base64'y-stuff
		1983	-----END RSA PRIVATE KEY-----
		1984
		1985	-----BEGIN CERTIFICATE-----
		1986	... lots of base64'y-stuff
		1987	-----END CERTIFICATE-----
		1988
		1989	The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then
		1990	specify this file as C<cert_file>:
		1991
		1992	tcp_server undef, $port, sub {
		1993	my ($fh) = @_;
		1994
		1995	my $handle = new AnyEvent::Handle
		1996	fh => $fh,
		1997	tls => "accept",
		1998	tls_ctx => { cert_file => "my-server-keycert.pem" },
		1999	...
		2000
		2001	When you have intermediate CA certificates that your clients might not
		2002	know about, just append them to the C<cert_file>.
		2003
1692	=back	2004	=back
1693		2005
1694		2006
1695	=head1 SUBCLASSING AnyEvent::Handle	2007	=head1 SUBCLASSING AnyEvent::Handle
1696		2008

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.134 by root, Fri Jul 3 00:09:04 2009 UTC vs. Revision 1.161 by root, Sat Jul 25 06:16:45 2009 UTC

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.134 by root, Fri Jul 3 00:09:04 2009 UTC vs.
Revision 1.161 by root, Sat Jul 25 06:16:45 2009 UTC