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

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.101 by root, Thu Oct 23 19:03:30 2008 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 = 4.3;	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 {
32	$cv->broadcast;	28	my ($hdl, $fatal, $msg) = @_;
33	},	29	warn "got error $msg\n";
		30	$hdl->destroy;
		31	$cv->send;
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
66	=over 4	66	=over 4
67		67
68	=item B<new (%args)>	68	=item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value...
69		69
70	The constructor supports these arguments (all as 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, $fatal)
101
102	This is the error callback, which is called when, well, some error
103	occured, such as not being able to resolve the hostname, failure to
104	connect or a read error.
105
106	Some errors are fatal (which is indicated by C<$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	Non-fatal errors can be retried by simply returning, but it is recommended
113	to simply ignore this parameter and instead abondon the handle object
114	when this callback is invoked. Examples of non-fatal errors are timeouts
115	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
116
117	On callback entrance, the value of C<$!> contains the operating system
118	error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>).
119
120	While not mandatory, it is I<highly> recommended to set this callback, as
121	you will not be notified of errors otherwise. The default simply calls
122	C<croak>.
123
124	=item on_read => $cb->($handle)
125
126	This sets the default read callback, which is called when data arrives
127	and no read request is in the queue (unlike read queue callbacks, this
128	callback will only be called when at least one octet of data is in the
129	read buffer).
130
131	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
132	method or access the C<$handle->{rbuf}> member directly.
133
134	When an EOF condition is detected then AnyEvent::Handle will first try to
135	feed all the remaining data to the queued callbacks and C<on_read> before
136	calling the C<on_eof> callback. If no progress can be made, then a fatal
137	error will be raised (with C<$!> set to C<EPIPE>).
138		205
139	=item on_drain => $cb->($handle)	206	=item on_drain => $cb->($handle)
140		207
141	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
142	(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).
235		302
236	This will not work for partial TLS data that could not be encoded	303	This will not work for partial TLS data that could not be encoded
237	yet. This data will be lost. Calling the C<stoptls> method in time might	304	yet. This data will be lost. Calling the C<stoptls> method in time might
238	help.	305	help.
239		306
		307	=item peername => $string
		308
		309	A string used to identify the remote site - usually the DNS hostname
		310	(I<not> IDN!) used to create the connection, rarely the IP address.
		311
		312	Apart from being useful in error messages, this string is also used in 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>.
		316
240	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object	317	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
241		318
242	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
243	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
244	established and will transparently encrypt/decrypt data afterwards.	321	established and will transparently encrypt/decrypt data afterwards.
		322
		323	All TLS protocol errors will be signalled as C<EPROTO>, with an
		324	appropriate error message.
245		325
246	TLS mode requires Net::SSLeay to be installed (it will be loaded	326	TLS mode requires Net::SSLeay to be installed (it will be loaded
247	automatically when you try to create a TLS handle): this module doesn't	327	automatically when you try to create a TLS handle): this module doesn't
248	have a dependency on that module, so if your module requires it, you have	328	have a dependency on that module, so if your module requires it, you have
249	to add the dependency yourself.	329	to add the dependency yourself.
…		…
253	mode.	333	mode.
254		334
255	You can also provide your own TLS connection object, but you have	335	You can also provide your own TLS connection object, but you have
256	to make sure that you call either C<Net::SSLeay::set_connect_state>	336	to make sure that you call either C<Net::SSLeay::set_connect_state>
257	or C<Net::SSLeay::set_accept_state> on it before you pass it to	337	or C<Net::SSLeay::set_accept_state> on it before you pass it to
258	AnyEvent::Handle.	338	AnyEvent::Handle. Also, this module will take ownership of this connection
		339	object.
		340
		341	At some future point, AnyEvent::Handle might switch to another TLS
		342	implementation, then the option to use your own session object will go
		343	away.
		344
		345	B<IMPORTANT:> since Net::SSLeay "objects" are really only integers,
		346	passing in the wrong integer will lead to certain crash. This most often
		347	happens when one uses a stylish C<< tls => 1 >> and is surprised about the
		348	segmentation fault.
259		349
260	See the C<< ->starttls >> method for when need to start TLS negotiation later.	350	See the C<< ->starttls >> method for when need to start TLS negotiation later.
261		351
262	=item tls_ctx => $ssl_ctx	352	=item tls_ctx => $anyevent_tls
263		353
264	Use the given C<Net::SSLeay::CTX> object to create the new TLS connection	354	Use the given C<AnyEvent::TLS> object to create the new TLS connection
265	(unless a connection object was specified directly). If this parameter is	355	(unless a connection object was specified directly). If this parameter is
266	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.	356	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.
		357
		358	Instead of an object, you can also specify a hash reference with C<< key
		359	=> value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a
		360	new TLS context object.
		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.
267		393
268	=item json => JSON or JSON::XS object	394	=item json => JSON or JSON::XS object
269		395
270	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.
271		397
…		…
280		406
281	=cut	407	=cut
282		408
283	sub new {	409	sub new {
284	my $class = shift;	410	my $class = shift;
285
286	my $self = bless { @_ }, $class;	411	my $self = bless { @_ }, $class;
287		412
288	$self->{fh} or Carp::croak "mandatory argument fh is missing";	413	if ($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) = @_;
289		476
290	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;	477	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;
		478
		479	$self->{_activity} = AnyEvent->now;
		480	$self->_timeout;
		481
		482	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};
291		483
292	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})	484	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})
293	if $self->{tls};	485	if $self->{tls};
294		486
295	$self->{_activity} = AnyEvent->now;
296	$self->_timeout;
297
298	$self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain};	487	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};
299	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};
300		488
301	$self->start_read	489	$self->start_read
302	if $self->{on_read};	490	if $self->{on_read} \|\| @{ $self->{_queue} };
303		491
304	$self	492	$self->_drain_wbuf;
305	}	493	}
306		494
307	sub _shutdown {	495	#sub _shutdown {
308	my ($self) = @_;	496	# my ($self) = @_;
309		497	#
310	delete $self->{_tw};	498	# delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)};
311	delete $self->{_rw};	499	# $self->{_eof} = 1; # tell starttls et. al to stop trying
312	delete $self->{_ww};	500	#
313	delete $self->{fh};
314
315	&_freetls;	501	# &_freetls;
316		502	#}
317	delete $self->{on_read};
318	delete $self->{_queue};
319	}
320		503
321	sub _error {	504	sub _error {
322	my ($self, $errno, $fatal) = @_;	505	my ($self, $errno, $fatal, $message) = @_;
323
324	$self->_shutdown
325	if $fatal;
326		506
327	$! = $errno;	507	$! = $errno;
		508	$message \|\|= "$!";
328		509
329	if ($self->{on_error}) {	510	if ($self->{on_error}) {
330	$self->{on_error}($self, $fatal);	511	$self->{on_error}($self, $fatal, $message);
		512	$self->destroy if $fatal;
331	} elsif ($self->{fh}) {	513	} elsif ($self->{fh}) {
		514	$self->destroy;
332	Carp::croak "AnyEvent::Handle uncaught error: $!";	515	Carp::croak "AnyEvent::Handle uncaught error: $message";
333	}	516	}
334	}	517	}
335		518
336	=item $fh = $handle->fh	519	=item $fh = $handle->fh
337		520
…		…
374	}	557	}
375		558
376	=item $handle->autocork ($boolean)	559	=item $handle->autocork ($boolean)
377		560
378	Enables or disables the current autocork behaviour (see C<autocork>	561	Enables or disables the current autocork behaviour (see C<autocork>
379	constructor argument).	562	constructor argument). Changes will only take effect on the next write.
380		563
381	=cut	564	=cut
		565
		566	sub autocork {
		567	$_[0]{autocork} = $_[1];
		568	}
382		569
383	=item $handle->no_delay ($boolean)	570	=item $handle->no_delay ($boolean)
384		571
385	Enables or disables the C<no_delay> setting (see constructor argument of	572	Enables or disables the C<no_delay> setting (see constructor argument of
386	the same name for details).	573	the same name for details).
…		…
390	sub no_delay {	577	sub no_delay {
391	$_[0]{no_delay} = $_[1];	578	$_[0]{no_delay} = $_[1];
392		579
393	eval {	580	eval {
394	local $SIG{__DIE__};	581	local $SIG{__DIE__};
395	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};
396	};	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];
397	}	605	}
398		606
399	#############################################################################	607	#############################################################################
400		608
401	=item $handle->timeout ($seconds)	609	=item $handle->timeout ($seconds)
…		…
414	# reset the timeout watcher, as neccessary	622	# reset the timeout watcher, as neccessary
415	# also check for time-outs	623	# also check for time-outs
416	sub _timeout {	624	sub _timeout {
417	my ($self) = @_;	625	my ($self) = @_;
418		626
419	if ($self->{timeout}) {	627	if ($self->{timeout} && $self->{fh}) {
420	my $NOW = AnyEvent->now;	628	my $NOW = AnyEvent->now;
421		629
422	# when would the timeout trigger?	630	# when would the timeout trigger?
423	my $after = $self->{_activity} + $self->{timeout} - $NOW;	631	my $after = $self->{_activity} + $self->{timeout} - $NOW;
424		632
…		…
427	$self->{_activity} = $NOW;	635	$self->{_activity} = $NOW;
428		636
429	if ($self->{on_timeout}) {	637	if ($self->{on_timeout}) {
430	$self->{on_timeout}($self);	638	$self->{on_timeout}($self);
431	} else {	639	} else {
432	$self->_error (&Errno::ETIMEDOUT);	640	$self->_error (Errno::ETIMEDOUT);
433	}	641	}
434		642
435	# callback could have changed timeout value, optimise	643	# callback could have changed timeout value, optimise
436	return unless $self->{timeout};	644	return unless $self->{timeout};
437		645
…		…
500	Scalar::Util::weaken $self;	708	Scalar::Util::weaken $self;
501		709
502	my $cb = sub {	710	my $cb = sub {
503	my $len = syswrite $self->{fh}, $self->{wbuf};	711	my $len = syswrite $self->{fh}, $self->{wbuf};
504		712
505	if ($len >= 0) {	713	if (defined $len) {
506	substr $self->{wbuf}, 0, $len, "";	714	substr $self->{wbuf}, 0, $len, "";
507		715
508	$self->{_activity} = AnyEvent->now;	716	$self->{_activity} = AnyEvent->now;
509		717
510	$self->{on_drain}($self)	718	$self->{on_drain}($self)
…		…
542	->($self, @_);	750	->($self, @_);
543	}	751	}
544		752
545	if ($self->{tls}) {	753	if ($self->{tls}) {
546	$self->{_tls_wbuf} .= $_[0];	754	$self->{_tls_wbuf} .= $_[0];
547		755	&_dotls ($self) if $self->{fh};
548	&_dotls ($self);
549	} else {	756	} else {
550	$self->{wbuf} .= $_[0];	757	$self->{wbuf} .= $_[0];
551	$self->_drain_wbuf;	758	$self->_drain_wbuf if $self->{fh};
552	}	759	}
553	}	760	}
554		761
555	=item $handle->push_write (type => @args)	762	=item $handle->push_write (type => @args)
556		763
…		…
645		852
646	pack "w/a*", Storable::nfreeze ($ref)	853	pack "w/a*", Storable::nfreeze ($ref)
647	};	854	};
648		855
649	=back	856	=back
		857
		858	=item $handle->push_shutdown
		859
		860	Sometimes you know you want to close the socket after writing your data
		861	before it was actually written. One way to do that is to replace your
		862	C<on_drain> handler by a callback that shuts down the socket (and set
		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:
		865
		866	sub { shutdown $_[0]{fh}, 1 } # for push_shutdown
		867
		868	This simply shuts down the write side and signals an EOF condition to the
		869	the peer.
		870
		871	You can rely on the normal read queue and C<on_eof> handling
		872	afterwards. This is the cleanest way to close a connection.
		873
		874	=cut
		875
		876	sub push_shutdown {
		877	my ($self) = @_;
		878
		879	delete $self->{low_water_mark};
		880	$self->on_drain (sub { shutdown $_[0]{fh}, 1 });
		881	}
650		882
651	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	883	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
652		884
653	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>.
654	Whenever the given C<type> is used, C<push_write> will invoke the code	886	Whenever the given C<type> is used, C<push_write> will invoke the code
…		…
748	=cut	980	=cut
749		981
750	sub _drain_rbuf {	982	sub _drain_rbuf {
751	my ($self) = @_;	983	my ($self) = @_;
752		984
		985	# avoid recursion
		986	return if exists $self->{_skip_drain_rbuf};
753	local $self->{_in_drain} = 1;	987	local $self->{_skip_drain_rbuf} = 1;
754		988
755	if (	989	if (
756	defined $self->{rbuf_max}	990	defined $self->{rbuf_max}
757	&& $self->{rbuf_max} < length $self->{rbuf}	991	&& $self->{rbuf_max} < length $self->{rbuf}
758	) {	992	) {
759	$self->_error (&Errno::ENOSPC, 1), return;	993	$self->_error (Errno::ENOSPC, 1), return;
760	}	994	}
761		995
762	while () {	996	while () {
		997	# 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.
		999	$self->{rbuf} .= delete $self->{_tls_rbuf} if exists $self->{_tls_rbuf};
		1000
763	my $len = length $self->{rbuf};	1001	my $len = length $self->{rbuf};
764		1002
765	if (my $cb = shift @{ $self->{_queue} }) {	1003	if (my $cb = shift @{ $self->{_queue} }) {
766	unless ($cb->($self)) {	1004	unless ($cb->($self)) {
767	if ($self->{_eof}) {	1005	if ($self->{_eof}) {
768	# 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)
769	$self->_error (&Errno::EPIPE, 1), return;	1007	$self->_error (Errno::EPIPE, 1), return;
770	}	1008	}
771		1009
772	unshift @{ $self->{_queue} }, $cb;	1010	unshift @{ $self->{_queue} }, $cb;
773	last;	1011	last;
774	}	1012	}
…		…
782	&& !@{ $self->{_queue} } # and the queue is still empty	1020	&& !@{ $self->{_queue} } # and the queue is still empty
783	&& $self->{on_read} # but we still have on_read	1021	&& $self->{on_read} # but we still have on_read
784	) {	1022	) {
785	# no further data will arrive	1023	# no further data will arrive
786	# so no progress can be made	1024	# so no progress can be made
787	$self->_error (&Errno::EPIPE, 1), return	1025	$self->_error (Errno::EPIPE, 1), return
788	if $self->{_eof};	1026	if $self->{_eof};
789		1027
790	last; # more data might arrive	1028	last; # more data might arrive
791	}	1029	}
792	} else {	1030	} else {
…		…
798		1036
799	if ($self->{_eof}) {	1037	if ($self->{_eof}) {
800	if ($self->{on_eof}) {	1038	if ($self->{on_eof}) {
801	$self->{on_eof}($self)	1039	$self->{on_eof}($self)
802	} else {	1040	} else {
803	$self->_error (0, 1);	1041	$self->_error (0, 1, "Unexpected end-of-file");
804	}	1042	}
805	}	1043	}
806		1044
807	# may need to restart read watcher	1045	# may need to restart read watcher
808	unless ($self->{_rw}) {	1046	unless ($self->{_rw}) {
…		…
821		1059
822	sub on_read {	1060	sub on_read {
823	my ($self, $cb) = @_;	1061	my ($self, $cb) = @_;
824		1062
825	$self->{on_read} = $cb;	1063	$self->{on_read} = $cb;
826	$self->_drain_rbuf if $cb && !$self->{_in_drain};	1064	$self->_drain_rbuf if $cb;
827	}	1065	}
828		1066
829	=item $handle->rbuf	1067	=item $handle->rbuf
830		1068
831	Returns the read buffer (as a modifiable lvalue).	1069	Returns the read buffer (as a modifiable lvalue).
832		1070
833	You can access the read buffer directly as the C<< ->{rbuf} >> member, if	1071	You can access the read buffer directly as the C<< ->{rbuf} >>
834	you want.	1072	member, if you want. However, the only operation allowed on the
		1073	read buffer (apart from looking at it) is removing data from its
		1074	beginning. Otherwise modifying or appending to it is not allowed and will
		1075	lead to hard-to-track-down bugs.
835		1076
836	NOTE: The read buffer should only be used or modified if the C<on_read>,	1077	NOTE: The read buffer should only be used or modified if the C<on_read>,
837	C<push_read> or C<unshift_read> methods are used. The other read methods	1078	C<push_read> or C<unshift_read> methods are used. The other read methods
838	automatically manage the read buffer.	1079	automatically manage the read buffer.
839		1080
…		…
880	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	1121	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
881	->($self, $cb, @_);	1122	->($self, $cb, @_);
882	}	1123	}
883		1124
884	push @{ $self->{_queue} }, $cb;	1125	push @{ $self->{_queue} }, $cb;
885	$self->_drain_rbuf unless $self->{_in_drain};	1126	$self->_drain_rbuf;
886	}	1127	}
887		1128
888	sub unshift_read {	1129	sub unshift_read {
889	my $self = shift;	1130	my $self = shift;
890	my $cb = pop;	1131	my $cb = pop;
…		…
896	->($self, $cb, @_);	1137	->($self, $cb, @_);
897	}	1138	}
898		1139
899		1140
900	unshift @{ $self->{_queue} }, $cb;	1141	unshift @{ $self->{_queue} }, $cb;
901	$self->_drain_rbuf unless $self->{_in_drain};	1142	$self->_drain_rbuf;
902	}	1143	}
903		1144
904	=item $handle->push_read (type => @args, $cb)	1145	=item $handle->push_read (type => @args, $cb)
905		1146
906	=item $handle->unshift_read (type => @args, $cb)	1147	=item $handle->unshift_read (type => @args, $cb)
…		…
1039	return 1;	1280	return 1;
1040	}	1281	}
1041		1282
1042	# reject	1283	# reject
1043	if ($reject && $$rbuf =~ $reject) {	1284	if ($reject && $$rbuf =~ $reject) {
1044	$self->_error (&Errno::EBADMSG);	1285	$self->_error (Errno::EBADMSG);
1045	}	1286	}
1046		1287
1047	# skip	1288	# skip
1048	if ($skip && $$rbuf =~ $skip) {	1289	if ($skip && $$rbuf =~ $skip) {
1049	$data .= substr $$rbuf, 0, $+[0], "";	1290	$data .= substr $$rbuf, 0, $+[0], "";
…		…
1065	my ($self, $cb) = @_;	1306	my ($self, $cb) = @_;
1066		1307
1067	sub {	1308	sub {
1068	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {	1309	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {
1069	if ($_[0]{rbuf} =~ /[^0-9]/) {	1310	if ($_[0]{rbuf} =~ /[^0-9]/) {
1070	$self->_error (&Errno::EBADMSG);	1311	$self->_error (Errno::EBADMSG);
1071	}	1312	}
1072	return;	1313	return;
1073	}	1314	}
1074		1315
1075	my $len = $1;	1316	my $len = $1;
…		…
1078	my $string = $_[1];	1319	my $string = $_[1];
1079	$_[0]->unshift_read (chunk => 1, sub {	1320	$_[0]->unshift_read (chunk => 1, sub {
1080	if ($_[1] eq ",") {	1321	if ($_[1] eq ",") {
1081	$cb->($_[0], $string);	1322	$cb->($_[0], $string);
1082	} else {	1323	} else {
1083	$self->_error (&Errno::EBADMSG);	1324	$self->_error (Errno::EBADMSG);
1084	}	1325	}
1085	});	1326	});
1086	});	1327	});
1087		1328
1088	1	1329	1
…		…
1135	}	1376	}
1136	};	1377	};
1137		1378
1138	=item json => $cb->($handle, $hash_or_arrayref)	1379	=item json => $cb->($handle, $hash_or_arrayref)
1139		1380
1140	Reads a JSON object or array, decodes it and passes it to the callback.	1381	Reads a JSON object or array, decodes it and passes it to the
		1382	callback. When a parse error occurs, an C<EBADMSG> error will be raised.
1141		1383
1142	If a C<json> object was passed to the constructor, then that will be used	1384	If a C<json> object was passed to the constructor, then that will be used
1143	for the final decode, otherwise it will create a JSON coder expecting UTF-8.	1385	for the final decode, otherwise it will create a JSON coder expecting UTF-8.
1144		1386
1145	This read type uses the incremental parser available with JSON version	1387	This read type uses the incremental parser available with JSON version
…		…
1154	=cut	1396	=cut
1155		1397
1156	register_read_type json => sub {	1398	register_read_type json => sub {
1157	my ($self, $cb) = @_;	1399	my ($self, $cb) = @_;
1158		1400
1159	require JSON;	1401	my $json = $self->{json} \|\|=
		1402	eval { require JSON::XS; JSON::XS->new->utf8 }
		1403	\|\| do { require JSON; JSON->new->utf8 };
1160		1404
1161	my $data;	1405	my $data;
1162	my $rbuf = \$self->{rbuf};	1406	my $rbuf = \$self->{rbuf};
1163		1407
1164	my $json = $self->{json} \|\|= JSON->new->utf8;
1165
1166	sub {	1408	sub {
1167	my $ref = $json->incr_parse ($self->{rbuf});	1409	my $ref = eval { $json->incr_parse ($self->{rbuf}) };
1168		1410
1169	if ($ref) {	1411	if ($ref) {
1170	$self->{rbuf} = $json->incr_text;	1412	$self->{rbuf} = $json->incr_text;
1171	$json->incr_text = "";	1413	$json->incr_text = "";
1172	$cb->($self, $ref);	1414	$cb->($self, $ref);
1173		1415
1174	1	1416	1
		1417	} elsif ($@) {
		1418	# error case
		1419	$json->incr_skip;
		1420
		1421	$self->{rbuf} = $json->incr_text;
		1422	$json->incr_text = "";
		1423
		1424	$self->_error (Errno::EBADMSG);
		1425
		1426	()
1175	} else {	1427	} else {
1176	$self->{rbuf} = "";	1428	$self->{rbuf} = "";
		1429
1177	()	1430	()
1178	}	1431	}
1179	}	1432	}
1180	};	1433	};
1181		1434
…		…
1213	# read remaining chunk	1466	# read remaining chunk
1214	$_[0]->unshift_read (chunk => $len, sub {	1467	$_[0]->unshift_read (chunk => $len, sub {
1215	if (my $ref = eval { Storable::thaw ($_[1]) }) {	1468	if (my $ref = eval { Storable::thaw ($_[1]) }) {
1216	$cb->($_[0], $ref);	1469	$cb->($_[0], $ref);
1217	} else {	1470	} else {
1218	$self->_error (&Errno::EBADMSG);	1471	$self->_error (Errno::EBADMSG);
1219	}	1472	}
1220	});	1473	});
1221	}	1474	}
1222		1475
1223	1	1476	1
…		…
1287	if ($self->{tls}) {	1540	if ($self->{tls}) {
1288	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);	1541	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);
1289		1542
1290	&_dotls ($self);	1543	&_dotls ($self);
1291	} else {	1544	} else {
1292	$self->_drain_rbuf unless $self->{_in_drain};	1545	$self->_drain_rbuf;
1293	}	1546	}
1294		1547
1295	} elsif (defined $len) {	1548	} elsif (defined $len) {
1296	delete $self->{_rw};	1549	delete $self->{_rw};
1297	$self->{_eof} = 1;	1550	$self->{_eof} = 1;
1298	$self->_drain_rbuf unless $self->{_in_drain};	1551	$self->_drain_rbuf;
1299		1552
1300	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	1553	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
1301	return $self->_error ($!, 1);	1554	return $self->_error ($!, 1);
1302	}	1555	}
1303	});	1556	});
1304	}	1557	}
1305	}	1558	}
1306		1559
		1560	our $ERROR_SYSCALL;
		1561	our $ERROR_WANT_READ;
		1562
		1563	sub _tls_error {
		1564	my ($self, $err) = @_;
		1565
		1566	return $self->_error ($!, 1)
		1567	if $err == Net::SSLeay::ERROR_SYSCALL ();
		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;
		1579	$self->_error (Errno::EPROTO, 1, $err);
		1580	}
		1581	}
		1582
1307	# poll the write BIO and send the data if applicable	1583	# poll the write BIO and send the data if applicable
		1584	# also decode read data if possible
		1585	# this is basiclaly our TLS state machine
		1586	# more efficient implementations are possible with openssl,
		1587	# but not with the buggy and incomplete Net::SSLeay.
1308	sub _dotls {	1588	sub _dotls {
1309	my ($self) = @_;	1589	my ($self) = @_;
1310		1590
1311	my $tmp;	1591	my $tmp;
1312		1592
1313	if (length $self->{_tls_wbuf}) {	1593	if (length $self->{_tls_wbuf}) {
1314	while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {	1594	while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
1315	substr $self->{_tls_wbuf}, 0, $tmp, "";	1595	substr $self->{_tls_wbuf}, 0, $tmp, "";
1316	}	1596	}
		1597
		1598	$tmp = Net::SSLeay::get_error ($self->{tls}, $tmp);
		1599	return $self->_tls_error ($tmp)
		1600	if $tmp != $ERROR_WANT_READ
		1601	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1317	}	1602	}
1318		1603
1319	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {	1604	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {
1320	unless (length $tmp) {	1605	unless (length $tmp) {
1321	# let's treat SSL-eof as we treat normal EOF	1606	$self->{_on_starttls}
1322	delete $self->{_rw};	1607	and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ???
1323	$self->{_eof} = 1;
1324	&_freetls;	1608	&_freetls;
		1609
		1610	if ($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	}
1325	}	1618	}
1326		1619
1327	$self->{rbuf} .= $tmp;	1620	$self->{_tls_rbuf} .= $tmp;
1328	$self->_drain_rbuf unless $self->{_in_drain};	1621	$self->_drain_rbuf;
1329	$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
1330	}	1623	}
1331		1624
1332	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);	1625	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);
1333
1334	if ($tmp != Net::SSLeay::ERROR_WANT_READ ()) {
1335	if ($tmp == Net::SSLeay::ERROR_SYSCALL ()) {
1336	return $self->_error ($!, 1);	1626	return $self->_tls_error ($tmp)
1337	} elsif ($tmp == Net::SSLeay::ERROR_SSL ()) {	1627	if $tmp != $ERROR_WANT_READ
1338	return $self->_error (&Errno::EIO, 1);	1628	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1339	}
1340
1341	# all other errors are fine for our purposes
1342	}
1343		1629
1344	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {	1630	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {
1345	$self->{wbuf} .= $tmp;	1631	$self->{wbuf} .= $tmp;
1346	$self->_drain_wbuf;	1632	$self->_drain_wbuf;
1347	}	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");
1348	}	1638	}
1349		1639
1350	=item $handle->starttls ($tls[, $tls_ctx])	1640	=item $handle->starttls ($tls[, $tls_ctx])
1351		1641
1352	Instead of starting TLS negotiation immediately when the AnyEvent::Handle	1642	Instead of starting TLS negotiation immediately when the AnyEvent::Handle
1353	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
1354	C<starttls>.	1644	C<starttls>.
1355		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.
		1649
1356	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
1357	C<"connect">, C<"accept"> or an existing Net::SSLeay object).	1651	C<"connect">, C<"accept"> or an existing Net::SSLeay object).
1358		1652
1359	The second argument is the optional C<Net::SSLeay::CTX> object that is	1653	The second argument is the optional C<AnyEvent::TLS> object that is used
1360	used when AnyEvent::Handle has to create its own TLS connection object.	1654	when AnyEvent::Handle has to create its own TLS connection object, or
		1655	a hash reference with C<< key => value >> pairs that will be used to
		1656	construct a new context.
1361		1657
1362	The TLS connection object will end up in C<< $handle->{tls} >> after this	1658	The TLS connection object will end up in C<< $handle->{tls} >>, the TLS
1363	call and can be used or changed to your liking. Note that the handshake	1659	context in C<< $handle->{tls_ctx} >> after this call and can be used or
1364	might have already started when this function returns.	1660	changed to your liking. Note that the handshake might have already started
		1661	when this function returns.
1365		1662
1366	If it an error to start a TLS handshake more than once per	1663	Due to bugs in OpenSSL, it might or might not be possible to do multiple
1367	AnyEvent::Handle object (this is due to bugs in OpenSSL).	1664	handshakes on the same stream. Best do not attempt to use the stream after
		1665	stopping TLS.
1368		1666
1369	=cut	1667	=cut
		1668
		1669	our %TLS_CACHE; #TODO not yet documented, should we?
1370		1670
1371	sub starttls {	1671	sub starttls {
1372	my ($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};
1373		1681
1374	require Net::SSLeay;	1682	require Net::SSLeay;
1375		1683
1376	Carp::croak "it is an error to call starttls more than once on an Anyevent::Handle object"	1684	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();
		1685	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();
		1686
1377	if $self->{tls};	1687	$tls = $self->{tls};
		1688	$ctx = $self->{tls_ctx};
		1689
		1690	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session
		1691
		1692	if ("HASH" eq ref $ctx) {
		1693	require AnyEvent::TLS;
		1694
		1695	if ($ctx->{cache}) {
		1696	my $key = $ctx+0;
		1697	$ctx = $TLS_CACHE{$key} \|\|= new AnyEvent::TLS %$ctx;
		1698	} else {
		1699	$ctx = new AnyEvent::TLS %$ctx;
		1700	}
		1701	}
1378		1702
1379	if ($ssl eq "accept") {	1703	$self->{tls_ctx} = $ctx \|\| TLS_CTX ();
1380	$ssl = Net::SSLeay::new ($ctx \|\| TLS_CTX ());	1704	$self->{tls} = $tls = $self->{tls_ctx}->_get_session ($tls, $self, $self->{peername});
1381	Net::SSLeay::set_accept_state ($ssl);
1382	} elsif ($ssl eq "connect") {
1383	$ssl = Net::SSLeay::new ($ctx \|\| TLS_CTX ());
1384	Net::SSLeay::set_connect_state ($ssl);
1385	}
1386
1387	$self->{tls} = $ssl;
1388		1705
1389	# basically, this is deep magic (because SSL_read should have the same issues)	1706	# basically, this is deep magic (because SSL_read should have the same issues)
1390	# but the openssl maintainers basically said: "trust us, it just works".	1707	# but the openssl maintainers basically said: "trust us, it just works".
1391	# (unfortunately, we have to hardcode constants because the abysmally misdesigned	1708	# (unfortunately, we have to hardcode constants because the abysmally misdesigned
1392	# and mismaintained ssleay-module doesn't even offer them).	1709	# and mismaintained ssleay-module doesn't even offer them).
…		…
1396	#	1713	#
1397	# note that we do not try to keep the length constant between writes as we are required to do.	1714	# note that we do not try to keep the length constant between writes as we are required to do.
1398	# we assume that most (but not all) of this insanity only applies to non-blocking cases,	1715	# we assume that most (but not all) of this insanity only applies to non-blocking cases,
1399	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to	1716	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to
1400	# have identity issues in that area.	1717	# have identity issues in that area.
1401	Net::SSLeay::CTX_set_mode ($self->{tls},	1718	# Net::SSLeay::CTX_set_mode ($ssl,
1402	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)	1719	# (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)
1403	\| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));	1720	# \| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));
		1721	Net::SSLeay::CTX_set_mode ($tls, 1\|2);
1404		1722
1405	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1723	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1406	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1724	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1407		1725
1408	Net::SSLeay::set_bio ($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};
1409		1730
1410	&_dotls; # need to trigger the initial handshake	1731	&_dotls; # need to trigger the initial handshake
1411	$self->start_read; # make sure we actually do read	1732	$self->start_read; # make sure we actually do read
1412	}	1733	}
1413		1734
1414	=item $handle->stoptls	1735	=item $handle->stoptls
1415		1736
1416	Shuts down the SSL connection - this makes a proper EOF handshake by	1737	Shuts down the SSL connection - this makes a proper EOF handshake by
1417	sending a close notify to the other side, but since OpenSSL doesn't	1738	sending a close notify to the other side, but since OpenSSL doesn't
1418	support non-blocking shut downs, it is not possible to re-use the stream	1739	support non-blocking shut downs, it is not guarenteed that you can re-use
1419	afterwards.	1740	the stream afterwards.
1420		1741
1421	=cut	1742	=cut
1422		1743
1423	sub stoptls {	1744	sub stoptls {
1424	my ($self) = @_;	1745	my ($self) = @_;
…		…
1426	if ($self->{tls}) {	1747	if ($self->{tls}) {
1427	Net::SSLeay::shutdown ($self->{tls});	1748	Net::SSLeay::shutdown ($self->{tls});
1428		1749
1429	&_dotls;	1750	&_dotls;
1430		1751
1431	# we don't give a shit. no, we do, but we can't. no...	1752	# # we don't give a shit. no, we do, but we can't. no...#d#
1432	# we, we... have to use openssl :/	1753	# # we, we... have to use openssl :/#d#
1433	&_freetls;	1754	# &_freetls;#d#
1434	}	1755	}
1435	}	1756	}
1436		1757
1437	sub _freetls {	1758	sub _freetls {
1438	my ($self) = @_;	1759	my ($self) = @_;
1439		1760
1440	return unless $self->{tls};	1761	return unless $self->{tls};
1441		1762
1442	Net::SSLeay::free (delete $self->{tls});	1763	$self->{tls_ctx}->_put_session (delete $self->{tls})
		1764	if ref $self->{tls};
1443		1765
1444	delete @$self{qw(_rbio _wbio _tls_wbuf)};	1766	delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)};
1445	}	1767	}
1446		1768
1447	sub DESTROY {	1769	sub DESTROY {
1448	my $self = shift;	1770	my ($self) = @_;
1449		1771
1450	&_freetls;	1772	&_freetls;
1451		1773
1452	my $linger = exists $self->{linger} ? $self->{linger} : 3600;	1774	my $linger = exists $self->{linger} ? $self->{linger} : 3600;
1453		1775
1454	if ($linger && length $self->{wbuf}) {	1776	if ($linger && length $self->{wbuf} && $self->{fh}) {
1455	my $fh = delete $self->{fh};	1777	my $fh = delete $self->{fh};
1456	my $wbuf = delete $self->{wbuf};	1778	my $wbuf = delete $self->{wbuf};
1457		1779
1458	my @linger;	1780	my @linger;
1459		1781
…		…
1473	}	1795	}
1474		1796
1475	=item $handle->destroy	1797	=item $handle->destroy
1476		1798
1477	Shuts down the handle object as much as possible - this call ensures that	1799	Shuts down the handle object as much as possible - this call ensures that
1478	no further callbacks will be invoked and resources will be freed as much	1800	no further callbacks will be invoked and as many resources as possible
1479	as possible. You must not call any methods on the object afterwards.	1801	will be freed. You must not call any methods on the object afterwards.
1480		1802
1481	Normally, you can just "forget" any references to an AnyEvent::Handle	1803	Normally, you can just "forget" any references to an AnyEvent::Handle
1482	object and it will simply shut down. This works in fatal error and EOF	1804	object and it will simply shut down. This works in fatal error and EOF
1483	callbacks, as well as code outside. It does I<NOT> work in a read or write	1805	callbacks, as well as code outside. It does I<NOT> work in a read or write
1484	callback, so when you want to destroy the AnyEvent::Handle object from	1806	callback, so when you want to destroy the AnyEvent::Handle object from
1485	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in	1807	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in
1486	that case.	1808	that case.
1487		1809
		1810	Destroying the handle object in this way has the advantage that callbacks
		1811	will be removed as well, so if those are the only reference holders (as
		1812	is common), then one doesn't need to do anything special to break any
		1813	reference cycles.
		1814
1488	The handle might still linger in the background and write out remaining	1815	The handle might still linger in the background and write out remaining
1489	data, as specified by the C<linger> option, however.	1816	data, as specified by the C<linger> option, however.
1490		1817
1491	=cut	1818	=cut
1492		1819
…		…
1497	%$self = ();	1824	%$self = ();
1498	}	1825	}
1499		1826
1500	=item AnyEvent::Handle::TLS_CTX	1827	=item AnyEvent::Handle::TLS_CTX
1501		1828
1502	This function creates and returns the Net::SSLeay::CTX object used by	1829	This function creates and returns the AnyEvent::TLS object used by default
1503	default for TLS mode.	1830	for TLS mode.
1504		1831
1505	The context is created like this:	1832	The context is created by calling L<AnyEvent::TLS> without any arguments.
1506
1507	Net::SSLeay::load_error_strings;
1508	Net::SSLeay::SSLeay_add_ssl_algorithms;
1509	Net::SSLeay::randomize;
1510
1511	my $CTX = Net::SSLeay::CTX_new;
1512
1513	Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL
1514		1833
1515	=cut	1834	=cut
1516		1835
1517	our $TLS_CTX;	1836	our $TLS_CTX;
1518		1837
1519	sub TLS_CTX() {	1838	sub TLS_CTX() {
1520	$TLS_CTX \|\| do {	1839	$TLS_CTX \|\|= do {
1521	require Net::SSLeay;	1840	require AnyEvent::TLS;
1522		1841
1523	Net::SSLeay::load_error_strings ();	1842	new AnyEvent::TLS
1524	Net::SSLeay::SSLeay_add_ssl_algorithms ();
1525	Net::SSLeay::randomize ();
1526
1527	$TLS_CTX = Net::SSLeay::CTX_new ();
1528
1529	Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ());
1530
1531	$TLS_CTX
1532	}	1843	}
1533	}	1844	}
1534		1845
1535	=back	1846	=back
1536		1847
…		…
1575		1886
1576	$handle->on_read (sub { });	1887	$handle->on_read (sub { });
1577	$handle->on_eof (undef);	1888	$handle->on_eof (undef);
1578	$handle->on_error (sub {	1889	$handle->on_error (sub {
1579	my $data = delete $_[0]{rbuf};	1890	my $data = delete $_[0]{rbuf};
1580	undef $handle;
1581	});	1891	});
1582		1892
1583	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
1584	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
1585	fact, all data has been received.	1895	fact, all data has been received.
…		…
1601	$handle->on_drain (sub {	1911	$handle->on_drain (sub {
1602	warn "all data submitted to the kernel\n";	1912	warn "all data submitted to the kernel\n";
1603	undef $handle;	1913	undef $handle;
1604	});	1914	});
1605		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
1606	=back	2004	=back
1607		2005
1608		2006
1609	=head1 SUBCLASSING AnyEvent::Handle	2007	=head1 SUBCLASSING AnyEvent::Handle
1610		2008

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.101 by root, Thu Oct 23 19:03:30 2008 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 1.101 by root, Thu Oct 23 19:03:30 2008 UTC vs.
Revision 1.161 by root, Sat Jul 25 06:16:45 2009 UTC