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Revision 1.102 by root, Wed Oct 29 14:32:02 2008 UTC vs.
Revision 1.182 by root, Thu Sep 3 12:35:01 2009 UTC

1	package AnyEvent::Handle;
2
3	no warnings;
4	use strict qw(subs vars);
5
6	use AnyEvent ();
7	use AnyEvent::Util qw(WSAEWOULDBLOCK);
8	use Scalar::Util ();
9	use Carp ();
10	use Fcntl ();
11	use Errno qw(EAGAIN EINTR);
12
13	=head1 NAME	1	=head1 NAME
14		2
15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent	3	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16
17	=cut
18
19	our $VERSION = 4.3;
20		4
21	=head1 SYNOPSIS	5	=head1 SYNOPSIS
22		6
23	use AnyEvent;	7	use AnyEvent;
24	use AnyEvent::Handle;	8	use AnyEvent::Handle;
25		9
26	my $cv = AnyEvent->condvar;	10	my $cv = AnyEvent->condvar;
27		11
28	my $handle =	12	my $hdl; $hdl = new AnyEvent::Handle
29	AnyEvent::Handle->new (
30	fh => \*STDIN,	13	fh => \*STDIN,
31	on_eof => sub {	14	on_error => sub {
32	$cv->broadcast;	15	my ($hdl, $fatal, $msg) = @_;
33	},	16	warn "got error $msg\n";
		17	$hdl->destroy;
		18	$cv->send;
34	);	19	);
35		20
36	# send some request line	21	# send some request line
37	$handle->push_write ("getinfo\015\012");	22	$hdl->push_write ("getinfo\015\012");
38		23
39	# read the response line	24	# read the response line
40	$handle->push_read (line => sub {	25	$hdl->push_read (line => sub {
41	my ($handle, $line) = @_;	26	my ($hdl, $line) = @_;
42	warn "read line <$line>\n";	27	warn "got line <$line>\n";
43	$cv->send;	28	$cv->send;
44	});	29	});
45		30
46	$cv->recv;	31	$cv->recv;
47		32
48	=head1 DESCRIPTION	33	=head1 DESCRIPTION
49		34
50	This module is a helper module to make it easier to do event-based I/O on	35	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	36	filehandles.
52	on sockets see L<AnyEvent::Util>.
53		37
54	The L<AnyEvent::Intro> tutorial contains some well-documented	38	The L<AnyEvent::Intro> tutorial contains some well-documented
55	AnyEvent::Handle examples.	39	AnyEvent::Handle examples.
56		40
57	In the following, when the documentation refers to of "bytes" then this	41	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	42	means characters. As sysread and syswrite are used for all I/O, their
59	treatment of characters applies to this module as well.	43	treatment of characters applies to this module as well.
60		44
		45	At the very minimum, you should specify C<fh> or C<connect>, and the
		46	C<on_error> callback.
		47
61	All callbacks will be invoked with the handle object as their first	48	All callbacks will be invoked with the handle object as their first
62	argument.	49	argument.
63		50
		51	=cut
		52
		53	package AnyEvent::Handle;
		54
		55	use Scalar::Util ();
		56	use List::Util ();
		57	use Carp ();
		58	use Errno qw(EAGAIN EINTR);
		59
		60	use AnyEvent (); BEGIN { AnyEvent::common_sense }
		61	use AnyEvent::Util qw(WSAEWOULDBLOCK);
		62
		63	our $VERSION = $AnyEvent::VERSION;
		64
64	=head1 METHODS	65	=head1 METHODS
65		66
66	=over 4	67	=over 4
67		68
68	=item B<new (%args)>	69	=item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value...
69		70
70	The constructor supports these arguments (all as key => value pairs).	71	The constructor supports these arguments (all as C<< key => value >> pairs).
71		72
72	=over 4	73	=over 4
73		74
74	=item fh => $filehandle [MANDATORY]	75	=item fh => $filehandle [C<fh> or C<connect> MANDATORY]
75		76
76	The filehandle this L<AnyEvent::Handle> object will operate on.	77	The filehandle this L<AnyEvent::Handle> object will operate on.
77
78	NOTE: The filehandle will be set to non-blocking mode (using	78	NOTE: The filehandle will be set to non-blocking mode (using
79	C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in	79	C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in
80	that mode.	80	that mode.
81		81
		82	=item connect => [$host, $service] [C<fh> or C<connect> MANDATORY]
		83
		84	Try to connect to the specified host and service (port), using
		85	C<AnyEvent::Socket::tcp_connect>. The C<$host> additionally becomes the
		86	default C<peername>.
		87
		88	You have to specify either this parameter, or C<fh>, above.
		89
		90	It is possible to push requests on the read and write queues, and modify
		91	properties of the stream, even while AnyEvent::Handle is connecting.
		92
		93	When this parameter is specified, then the C<on_prepare>,
		94	C<on_connect_error> and C<on_connect> callbacks will be called under the
		95	appropriate circumstances:
		96
		97	=over 4
		98
		99	=item on_prepare => $cb->($handle)
		100
		101	This (rarely used) callback is called before a new connection is
		102	attempted, but after the file handle has been created. It could be used to
		103	prepare the file handle with parameters required for the actual connect
		104	(as opposed to settings that can be changed when the connection is already
		105	established).
		106
		107	The return value of this callback should be the connect timeout value in
		108	seconds (or C<0>, or C<undef>, or the empty list, to indicate the default
		109	timeout is to be used).
		110
		111	=item on_connect => $cb->($handle, $host, $port, $retry->())
		112
		113	This callback is called when a connection has been successfully established.
		114
		115	The actual numeric host and port (the socket peername) are passed as
		116	parameters, together with a retry callback.
		117
		118	When, for some reason, the handle is not acceptable, then calling
		119	C<$retry> will continue with the next conenction target (in case of
		120	multi-homed hosts or SRV records there can be multiple connection
		121	endpoints). When it is called then the read and write queues, eof status,
		122	tls status and similar properties of the handle are being reset.
		123
		124	In most cases, ignoring the C<$retry> parameter is the way to go.
		125
		126	=item on_connect_error => $cb->($handle, $message)
		127
		128	This callback is called when the conenction could not be
		129	established. C<$!> will contain the relevant error code, and C<$message> a
		130	message describing it (usually the same as C<"$!">).
		131
		132	If this callback isn't specified, then C<on_error> will be called with a
		133	fatal error instead.
		134
		135	=back
		136
		137	=item on_error => $cb->($handle, $fatal, $message)
		138
		139	This is the error callback, which is called when, well, some error
		140	occured, such as not being able to resolve the hostname, failure to
		141	connect or a read error.
		142
		143	Some errors are fatal (which is indicated by C<$fatal> being true). On
		144	fatal errors the handle object will be destroyed (by a call to C<< ->
		145	destroy >>) after invoking the error callback (which means you are free to
		146	examine the handle object). Examples of fatal errors are an EOF condition
		147	with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. In
		148	cases where the other side can close the connection at their will it is
		149	often easiest to not report C<EPIPE> errors in this callback.
		150
		151	AnyEvent::Handle tries to find an appropriate error code for you to check
		152	against, but in some cases (TLS errors), this does not work well. It is
		153	recommended to always output the C<$message> argument in human-readable
		154	error messages (it's usually the same as C<"$!">).
		155
		156	Non-fatal errors can be retried by simply returning, but it is recommended
		157	to simply ignore this parameter and instead abondon the handle object
		158	when this callback is invoked. Examples of non-fatal errors are timeouts
		159	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
		160
		161	On callback entrance, the value of C<$!> contains the operating system
		162	error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or
		163	C<EPROTO>).
		164
		165	While not mandatory, it is I<highly> recommended to set this callback, as
		166	you will not be notified of errors otherwise. The default simply calls
		167	C<croak>.
		168
		169	=item on_read => $cb->($handle)
		170
		171	This sets the default read callback, which is called when data arrives
		172	and no read request is in the queue (unlike read queue callbacks, this
		173	callback will only be called when at least one octet of data is in the
		174	read buffer).
		175
		176	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
		177	method or access the C<< $handle->{rbuf} >> member directly. Note that you
		178	must not enlarge or modify the read buffer, you can only remove data at
		179	the beginning from it.
		180
		181	When an EOF condition is detected then AnyEvent::Handle will first try to
		182	feed all the remaining data to the queued callbacks and C<on_read> before
		183	calling the C<on_eof> callback. If no progress can be made, then a fatal
		184	error will be raised (with C<$!> set to C<EPIPE>).
		185
		186	Note that, unlike requests in the read queue, an C<on_read> callback
		187	doesn't mean you I<require> some data: if there is an EOF and there
		188	are outstanding read requests then an error will be flagged. With an
		189	C<on_read> callback, the C<on_eof> callback will be invoked.
		190
82	=item on_eof => $cb->($handle)	191	=item on_eof => $cb->($handle)
83		192
84	Set the callback to be called when an end-of-file condition is detected,	193	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	194	i.e. in the case of a socket, when the other side has closed the
86	connection cleanly.	195	connection cleanly, and there are no outstanding read requests in the
		196	queue (if there are read requests, then an EOF counts as an unexpected
		197	connection close and will be flagged as an error).
87		198
88	For sockets, this just means that the other side has stopped sending data,	199	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	200	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	201	callback and continue writing data, as only the read part has been shut
91	down.	202	down.
92		203
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	204	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<$!> set to <0>.	205	set, then a fatal error will be raised with C<$!> 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		206
139	=item on_drain => $cb->($handle)	207	=item on_drain => $cb->($handle)
140		208
141	This sets the callback that is called when the write buffer becomes empty	209	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).	210	(or when the callback is set and the buffer is empty already).
…		…
149	memory and push it into the queue, but instead only read more data from	217	memory and push it into the queue, but instead only read more data from
150	the file when the write queue becomes empty.	218	the file when the write queue becomes empty.
151		219
152	=item timeout => $fractional_seconds	220	=item timeout => $fractional_seconds
153		221
		222	=item rtimeout => $fractional_seconds
		223
		224	=item wtimeout => $fractional_seconds
		225
154	If non-zero, then this enables an "inactivity" timeout: whenever this many	226	If non-zero, then these enables an "inactivity" timeout: whenever this
155	seconds pass without a successful read or write on the underlying file	227	many seconds pass without a successful read or write on the underlying
156	handle, the C<on_timeout> callback will be invoked (and if that one is	228	file handle (or a call to C<timeout_reset>), the C<on_timeout> callback
157	missing, a non-fatal C<ETIMEDOUT> error will be raised).	229	will be invoked (and if that one is missing, a non-fatal C<ETIMEDOUT>
		230	error will be raised).
		231
		232	There are three variants of the timeouts that work fully independent
		233	of each other, for both read and write, just read, and just write:
		234	C<timeout>, C<rtimeout> and C<wtimeout>, with corresponding callbacks
		235	C<on_timeout>, C<on_rtimeout> and C<on_wtimeout>, and reset functions
		236	C<timeout_reset>, C<rtimeout_reset>, and C<wtimeout_reset>.
158		237
159	Note that timeout processing is also active when you currently do not have	238	Note that timeout processing is also active when you currently do not have
160	any outstanding read or write requests: If you plan to keep the connection	239	any outstanding read or write requests: If you plan to keep the connection
161	idle then you should disable the timout temporarily or ignore the timeout	240	idle then you should disable the timout temporarily or ignore the timeout
162	in the C<on_timeout> callback, in which case AnyEvent::Handle will simply	241	in the C<on_timeout> callback, in which case AnyEvent::Handle will simply
…		…
206	accomplishd by setting this option to a true value.	285	accomplishd by setting this option to a true value.
207		286
208	The default is your opertaing system's default behaviour (most likely	287	The default is your opertaing system's default behaviour (most likely
209	enabled), this option explicitly enables or disables it, if possible.	288	enabled), this option explicitly enables or disables it, if possible.
210		289
		290	=item keepalive => <boolean>
		291
		292	Enables (default disable) the SO_KEEPALIVE option on the stream socket:
		293	normally, TCP connections have no time-out once established, so TCP
		294	conenctions, once established, can stay alive forever even when the other
		295	side has long gone. TCP keepalives are a cheap way to take down long-lived
		296	TCP connections whent he other side becomes unreachable. While the default
		297	is OS-dependent, TCP keepalives usually kick in after around two hours,
		298	and, if the other side doesn't reply, take down the TCP connection some 10
		299	to 15 minutes later.
		300
		301	It is harmless to specify this option for file handles that do not support
		302	keepalives, and enabling it on connections that are potentially long-lived
		303	is usually a good idea.
		304
		305	=item oobinline => <boolean>
		306
		307	BSD majorly fucked up the implementation of TCP urgent data. The result
		308	is that almost no OS implements TCP according to the specs, and every OS
		309	implements it slightly differently.
		310
		311	If you want to handle TCP urgent data, then setting this flag gives you
		312	the most portable way of getting urgent data, by putting it into the
		313	stream.
		314
211	=item read_size => <bytes>	315	=item read_size => <bytes>
212		316
213	The default read block size (the amount of bytes this module will	317	The default read block size (the amount of bytes this module will
214	try to read during each loop iteration, which affects memory	318	try to read during each loop iteration, which affects memory
215	requirements). Default: C<8192>.	319	requirements). Default: C<8192>.
…		…
235		339
236	This will not work for partial TLS data that could not be encoded	340	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	341	yet. This data will be lost. Calling the C<stoptls> method in time might
238	help.	342	help.
239		343
		344	=item peername => $string
		345
		346	A string used to identify the remote site - usually the DNS hostname
		347	(I<not> IDN!) used to create the connection, rarely the IP address.
		348
		349	Apart from being useful in error messages, this string is also used in TLS
		350	peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This
		351	verification will be skipped when C<peername> is not specified or
		352	C<undef>.
		353
240	=item tls => "accept" | "connect" | Net::SSLeay::SSL object	354	=item tls => "accept" | "connect" | Net::SSLeay::SSL object
241		355
242	When this parameter is given, it enables TLS (SSL) mode, that means	356	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	357	AnyEvent will start a TLS handshake as soon as the conenction has been
244	established and will transparently encrypt/decrypt data afterwards.	358	established and will transparently encrypt/decrypt data afterwards.
		359
		360	All TLS protocol errors will be signalled as C<EPROTO>, with an
		361	appropriate error message.
245		362
246	TLS mode requires Net::SSLeay to be installed (it will be loaded	363	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	364	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	365	have a dependency on that module, so if your module requires it, you have
249	to add the dependency yourself.	366	to add the dependency yourself.
…		…
253	mode.	370	mode.
254		371
255	You can also provide your own TLS connection object, but you have	372	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>	373	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	374	or C<Net::SSLeay::set_accept_state> on it before you pass it to
258	AnyEvent::Handle.	375	AnyEvent::Handle. Also, this module will take ownership of this connection
		376	object.
		377
		378	At some future point, AnyEvent::Handle might switch to another TLS
		379	implementation, then the option to use your own session object will go
		380	away.
		381
		382	B<IMPORTANT:> since Net::SSLeay "objects" are really only integers,
		383	passing in the wrong integer will lead to certain crash. This most often
		384	happens when one uses a stylish C<< tls => 1 >> and is surprised about the
		385	segmentation fault.
259		386
260	See the C<< ->starttls >> method for when need to start TLS negotiation later.	387	See the C<< ->starttls >> method for when need to start TLS negotiation later.
261		388
262	=item tls_ctx => $ssl_ctx	389	=item tls_ctx => $anyevent_tls
263		390
264	Use the given C<Net::SSLeay::CTX> object to create the new TLS connection	391	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	392	(unless a connection object was specified directly). If this parameter is
266	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.	393	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.
		394
		395	Instead of an object, you can also specify a hash reference with C<< key
		396	=> value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a
		397	new TLS context object.
		398
		399	=item on_starttls => $cb->($handle, $success[, $error_message])
		400
		401	This callback will be invoked when the TLS/SSL handshake has finished. If
		402	C<$success> is true, then the TLS handshake succeeded, otherwise it failed
		403	(C<on_stoptls> will not be called in this case).
		404
		405	The session in C<< $handle->{tls} >> can still be examined in this
		406	callback, even when the handshake was not successful.
		407
		408	TLS handshake failures will not cause C<on_error> to be invoked when this
		409	callback is in effect, instead, the error message will be passed to C<on_starttls>.
		410
		411	Without this callback, handshake failures lead to C<on_error> being
		412	called, as normal.
		413
		414	Note that you cannot call C<starttls> right again in this callback. If you
		415	need to do that, start an zero-second timer instead whose callback can
		416	then call C<< ->starttls >> again.
		417
		418	=item on_stoptls => $cb->($handle)
		419
		420	When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is
		421	set, then it will be invoked after freeing the TLS session. If it is not,
		422	then a TLS shutdown condition will be treated like a normal EOF condition
		423	on the handle.
		424
		425	The session in C<< $handle->{tls} >> can still be examined in this
		426	callback.
		427
		428	This callback will only be called on TLS shutdowns, not when the
		429	underlying handle signals EOF.
267		430
268	=item json => JSON or JSON::XS object	431	=item json => JSON or JSON::XS object
269		432
270	This is the json coder object used by the C<json> read and write types.	433	This is the json coder object used by the C<json> read and write types.
271		434
…		…
280		443
281	=cut	444	=cut
282		445
283	sub new {	446	sub new {
284	my $class = shift;	447	my $class = shift;
285
286	my $self = bless { @_ }, $class;	448	my $self = bless { @_ }, $class;
287		449
288	$self->{fh} or Carp::croak "mandatory argument fh is missing";	450	if ($self->{fh}) {
		451	$self->_start;
		452	return unless $self->{fh}; # could be gone by now
		453
		454	} elsif ($self->{connect}) {
		455	require AnyEvent::Socket;
		456
		457	$self->{peername} = $self->{connect}[0]
		458	unless exists $self->{peername};
		459
		460	$self->{_skip_drain_rbuf} = 1;
		461
		462	{
		463	Scalar::Util::weaken (my $self = $self);
		464
		465	$self->{_connect} =
		466	AnyEvent::Socket::tcp_connect (
		467	$self->{connect}[0],
		468	$self->{connect}[1],
		469	sub {
		470	my ($fh, $host, $port, $retry) = @_;
		471
		472	if ($fh) {
		473	$self->{fh} = $fh;
		474
		475	delete $self->{_skip_drain_rbuf};
		476	$self->_start;
		477
		478	$self->{on_connect}
		479	and $self->{on_connect}($self, $host, $port, sub {
		480	delete @$self{qw(fh _tw _rtw _wtw _ww _rw _eof _queue rbuf _wbuf tls _tls_rbuf _tls_wbuf)};
		481	$self->{_skip_drain_rbuf} = 1;
		482	&$retry;
		483	});
		484
		485	} else {
		486	if ($self->{on_connect_error}) {
		487	$self->{on_connect_error}($self, "$!");
		488	$self->destroy;
		489	} else {
		490	$self->_error ($!, 1);
		491	}
		492	}
		493	},
		494	sub {
		495	local $self->{fh} = $_[0];
		496
		497	$self->{on_prepare}
		498	? $self->{on_prepare}->($self)
		499	: ()
		500	}
		501	);
		502	}
		503
		504	} else {
		505	Carp::croak "AnyEvent::Handle: either an existing fh or the connect parameter must be specified";
		506	}
		507
		508	$self
		509	}
		510
		511	sub _start {
		512	my ($self) = @_;
289		513
290	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;	514	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;
291		515
		516	$self->{_activity} =
		517	$self->{_ractivity} =
		518	$self->{_wactivity} = AE::now;
		519
		520	$self->timeout (delete $self->{timeout} ) if $self->{timeout};
		521	$self->rtimeout (delete $self->{rtimeout} ) if $self->{rtimeout};
		522	$self->wtimeout (delete $self->{wtimeout} ) if $self->{wtimeout};
		523
		524	$self->no_delay (delete $self->{no_delay} ) if exists $self->{no_delay};
		525	$self->keepalive (delete $self->{keepalive}) if exists $self->{keepalive};
		526	$self->oobinline (delete $self->{oobinline}) if exists $self->{oobinline};
		527
292	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})	528	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})
293	if $self->{tls};	529	if $self->{tls};
294		530
295	$self->{_activity} = AnyEvent->now;
296	$self->_timeout;
297
298	$self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain};	531	$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		532
301	$self->start_read	533	$self->start_read
302	if $self->{on_read};	534	if $self->{on_read} || @{ $self->{_queue} };
303		535
304	$self	536	$self->_drain_wbuf;
305	}
306
307	sub _shutdown {
308	my ($self) = @_;
309
310	delete $self->{_tw};
311	delete $self->{_rw};
312	delete $self->{_ww};
313	delete $self->{fh};
314
315	&_freetls;
316
317	delete $self->{on_read};
318	delete $self->{_queue};
319	}	537	}
320		538
321	sub _error {	539	sub _error {
322	my ($self, $errno, $fatal) = @_;	540	my ($self, $errno, $fatal, $message) = @_;
323
324	$self->_shutdown
325	if $fatal;
326		541
327	$! = $errno;	542	$! = $errno;
		543	$message ||= "$!";
328		544
329	if ($self->{on_error}) {	545	if ($self->{on_error}) {
330	$self->{on_error}($self, $fatal);	546	$self->{on_error}($self, $fatal, $message);
		547	$self->destroy if $fatal;
331	} elsif ($self->{fh}) {	548	} elsif ($self->{fh}) {
		549	$self->destroy;
332	Carp::croak "AnyEvent::Handle uncaught error: $!";	550	Carp::croak "AnyEvent::Handle uncaught error: $message";
333	}	551	}
334	}	552	}
335		553
336	=item $fh = $handle->fh	554	=item $fh = $handle->fh
337		555
…		…
361	$_[0]{on_eof} = $_[1];	579	$_[0]{on_eof} = $_[1];
362	}	580	}
363		581
364	=item $handle->on_timeout ($cb)	582	=item $handle->on_timeout ($cb)
365		583
366	Replace the current C<on_timeout> callback, or disables the callback (but	584	=item $handle->on_rtimeout ($cb)
367	not the timeout) if C<$cb> = C<undef>. See the C<timeout> constructor
368	argument and method.
369		585
370	=cut	586	=item $handle->on_wtimeout ($cb)
371		587
372	sub on_timeout {	588	Replace the current C<on_timeout>, C<on_rtimeout> or C<on_wtimeout>
373	$_[0]{on_timeout} = $_[1];	589	callback, or disables the callback (but not the timeout) if C<$cb> =
374	}	590	C<undef>. See the C<timeout> constructor argument and method.
		591
		592	=cut
		593
		594	# see below
375		595
376	=item $handle->autocork ($boolean)	596	=item $handle->autocork ($boolean)
377		597
378	Enables or disables the current autocork behaviour (see C<autocork>	598	Enables or disables the current autocork behaviour (see C<autocork>
379	constructor argument).	599	constructor argument). Changes will only take effect on the next write.
380		600
381	=cut	601	=cut
		602
		603	sub autocork {
		604	$_[0]{autocork} = $_[1];
		605	}
382		606
383	=item $handle->no_delay ($boolean)	607	=item $handle->no_delay ($boolean)
384		608
385	Enables or disables the C<no_delay> setting (see constructor argument of	609	Enables or disables the C<no_delay> setting (see constructor argument of
386	the same name for details).	610	the same name for details).
…		…
390	sub no_delay {	614	sub no_delay {
391	$_[0]{no_delay} = $_[1];	615	$_[0]{no_delay} = $_[1];
392		616
393	eval {	617	eval {
394	local $SIG{__DIE__};	618	local $SIG{__DIE__};
395	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1];	619	setsockopt $_[0]{fh}, Socket::IPPROTO_TCP (), Socket::TCP_NODELAY (), int $_[1]
		620	if $_[0]{fh};
396	};	621	};
397	}	622	}
398		623
		624	=item $handle->keepalive ($boolean)
		625
		626	Enables or disables the C<keepalive> setting (see constructor argument of
		627	the same name for details).
		628
		629	=cut
		630
		631	sub keepalive {
		632	$_[0]{keepalive} = $_[1];
		633
		634	eval {
		635	local $SIG{__DIE__};
		636	setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_KEEPALIVE (), int $_[1]
		637	if $_[0]{fh};
		638	};
		639	}
		640
		641	=item $handle->oobinline ($boolean)
		642
		643	Enables or disables the C<oobinline> setting (see constructor argument of
		644	the same name for details).
		645
		646	=cut
		647
		648	sub oobinline {
		649	$_[0]{oobinline} = $_[1];
		650
		651	eval {
		652	local $SIG{__DIE__};
		653	setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_OOBINLINE (), int $_[1]
		654	if $_[0]{fh};
		655	};
		656	}
		657
		658	=item $handle->keepalive ($boolean)
		659
		660	Enables or disables the C<keepalive> setting (see constructor argument of
		661	the same name for details).
		662
		663	=cut
		664
		665	sub keepalive {
		666	$_[0]{keepalive} = $_[1];
		667
		668	eval {
		669	local $SIG{__DIE__};
		670	setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_KEEPALIVE (), int $_[1]
		671	if $_[0]{fh};
		672	};
		673	}
		674
		675	=item $handle->on_starttls ($cb)
		676
		677	Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument).
		678
		679	=cut
		680
		681	sub on_starttls {
		682	$_[0]{on_starttls} = $_[1];
		683	}
		684
		685	=item $handle->on_stoptls ($cb)
		686
		687	Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument).
		688
		689	=cut
		690
		691	sub on_starttls {
		692	$_[0]{on_stoptls} = $_[1];
		693	}
		694
		695	=item $handle->rbuf_max ($max_octets)
		696
		697	Configures the C<rbuf_max> setting (C<undef> disables it).
		698
		699	=cut
		700
		701	sub rbuf_max {
		702	$_[0]{rbuf_max} = $_[1];
		703	}
		704
399	#############################################################################	705	#############################################################################
400		706
401	=item $handle->timeout ($seconds)	707	=item $handle->timeout ($seconds)
402		708
		709	=item $handle->rtimeout ($seconds)
		710
		711	=item $handle->wtimeout ($seconds)
		712
403	Configures (or disables) the inactivity timeout.	713	Configures (or disables) the inactivity timeout.
404		714
405	=cut	715	=item $handle->timeout_reset
406		716
407	sub timeout {	717	=item $handle->rtimeout_reset
		718
		719	=item $handle->wtimeout_reset
		720
		721	Reset the activity timeout, as if data was received or sent.
		722
		723	These methods are cheap to call.
		724
		725	=cut
		726
		727	for my $dir ("", "r", "w") {
		728	my $timeout = "${dir}timeout";
		729	my $tw = "_${dir}tw";
		730	my $on_timeout = "on_${dir}timeout";
		731	my $activity = "_${dir}activity";
		732	my $cb;
		733
		734	*$on_timeout = sub {
		735	$_[0]{$on_timeout} = $_[1];
		736	};
		737
		738	*$timeout = sub {
408	my ($self, $timeout) = @_;	739	my ($self, $new_value) = @_;
409		740
410	$self->{timeout} = $timeout;	741	$self->{$timeout} = $new_value;
411	$self->_timeout;	742	delete $self->{$tw}; &$cb;
412	}	743	};
413		744
		745	*{"${dir}timeout_reset"} = sub {
		746	$_[0]{$activity} = AE::now;
		747	};
		748
		749	# main workhorse:
414	# reset the timeout watcher, as neccessary	750	# reset the timeout watcher, as neccessary
415	# also check for time-outs	751	# also check for time-outs
416	sub _timeout {	752	$cb = sub {
417	my ($self) = @_;	753	my ($self) = @_;
418		754
419	if ($self->{timeout}) {	755	if ($self->{$timeout} && $self->{fh}) {
420	my $NOW = AnyEvent->now;	756	my $NOW = AE::now;
421		757
422	# when would the timeout trigger?	758	# when would the timeout trigger?
423	my $after = $self->{_activity} + $self->{timeout} - $NOW;	759	my $after = $self->{$activity} + $self->{$timeout} - $NOW;
424		760
425	# now or in the past already?	761	# now or in the past already?
426	if ($after <= 0) {	762	if ($after <= 0) {
427	$self->{_activity} = $NOW;	763	$self->{$activity} = $NOW;
428		764
429	if ($self->{on_timeout}) {	765	if ($self->{$on_timeout}) {
430	$self->{on_timeout}($self);	766	$self->{$on_timeout}($self);
431	} else {	767	} else {
432	$self->_error (&Errno::ETIMEDOUT);	768	$self->_error (Errno::ETIMEDOUT);
		769	}
		770
		771	# callback could have changed timeout value, optimise
		772	return unless $self->{$timeout};
		773
		774	# calculate new after
		775	$after = $self->{$timeout};
433	}	776	}
434		777
435	# callback could have changed timeout value, optimise	778	Scalar::Util::weaken $self;
436	return unless $self->{timeout};	779	return unless $self; # ->error could have destroyed $self
437		780
438	# calculate new after	781	$self->{$tw} ||= AE::timer $after, 0, sub {
439	$after = $self->{timeout};	782	delete $self->{$tw};
		783	$cb->($self);
		784	};
		785	} else {
		786	delete $self->{$tw};
440	}	787	}
441
442	Scalar::Util::weaken $self;
443	return unless $self; # ->error could have destroyed $self
444
445	$self->{_tw} ||= AnyEvent->timer (after => $after, cb => sub {
446	delete $self->{_tw};
447	$self->_timeout;
448	});
449	} else {
450	delete $self->{_tw};
451	}	788	}
452	}	789	}
453		790
454	#############################################################################	791	#############################################################################
455		792
…		…
500	Scalar::Util::weaken $self;	837	Scalar::Util::weaken $self;
501		838
502	my $cb = sub {	839	my $cb = sub {
503	my $len = syswrite $self->{fh}, $self->{wbuf};	840	my $len = syswrite $self->{fh}, $self->{wbuf};
504		841
505	if ($len >= 0) {	842	if (defined $len) {
506	substr $self->{wbuf}, 0, $len, "";	843	substr $self->{wbuf}, 0, $len, "";
507		844
508	$self->{_activity} = AnyEvent->now;	845	$self->{_activity} = $self->{_wactivity} = AE::now;
509		846
510	$self->{on_drain}($self)	847	$self->{on_drain}($self)
511	if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf})	848	if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf})
512	&& $self->{on_drain};	849	&& $self->{on_drain};
513		850
…		…
519		856
520	# try to write data immediately	857	# try to write data immediately
521	$cb->() unless $self->{autocork};	858	$cb->() unless $self->{autocork};
522		859
523	# if still data left in wbuf, we need to poll	860	# if still data left in wbuf, we need to poll
524	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)	861	$self->{_ww} = AE::io $self->{fh}, 1, $cb
525	if length $self->{wbuf};	862	if length $self->{wbuf};
526	};	863	};
527	}	864	}
528		865
529	our %WH;	866	our %WH;
…		…
542	->($self, @_);	879	->($self, @_);
543	}	880	}
544		881
545	if ($self->{tls}) {	882	if ($self->{tls}) {
546	$self->{_tls_wbuf} .= $_[0];	883	$self->{_tls_wbuf} .= $_[0];
547		884	&_dotls ($self) if $self->{fh};
548	&_dotls ($self);
549	} else {	885	} else {
550	$self->{wbuf} .= $_[0];	886	$self->{wbuf} .= $_[0];
551	$self->_drain_wbuf;	887	$self->_drain_wbuf if $self->{fh};
552	}	888	}
553	}	889	}
554		890
555	=item $handle->push_write (type => @args)	891	=item $handle->push_write (type => @args)
556		892
…		…
620	Other languages could read single lines terminated by a newline and pass	956	Other languages could read single lines terminated by a newline and pass
621	this line into their JSON decoder of choice.	957	this line into their JSON decoder of choice.
622		958
623	=cut	959	=cut
624		960
		961	sub json_coder() {
		962	eval { require JSON::XS; JSON::XS->new->utf8 }
		963	|| do { require JSON; JSON->new->utf8 }
		964	}
		965
625	register_write_type json => sub {	966	register_write_type json => sub {
626	my ($self, $ref) = @_;	967	my ($self, $ref) = @_;
627		968
628	require JSON;	969	my $json = $self->{json} ||= json_coder;
629		970
630	$self->{json} ? $self->{json}->encode ($ref)	971	$json->encode ($ref)
631	: JSON::encode_json ($ref)
632	};	972	};
633		973
634	=item storable => $reference	974	=item storable => $reference
635		975
636	Freezes the given reference using L<Storable> and writes it to the	976	Freezes the given reference using L<Storable> and writes it to the
…		…
645		985
646	pack "w/a*", Storable::nfreeze ($ref)	986	pack "w/a*", Storable::nfreeze ($ref)
647	};	987	};
648		988
649	=back	989	=back
		990
		991	=item $handle->push_shutdown
		992
		993	Sometimes you know you want to close the socket after writing your data
		994	before it was actually written. One way to do that is to replace your
		995	C<on_drain> handler by a callback that shuts down the socket (and set
		996	C<low_water_mark> to C<0>). This method is a shorthand for just that, and
		997	replaces the C<on_drain> callback with:
		998
		999	sub { shutdown $_[0]{fh}, 1 } # for push_shutdown
		1000
		1001	This simply shuts down the write side and signals an EOF condition to the
		1002	the peer.
		1003
		1004	You can rely on the normal read queue and C<on_eof> handling
		1005	afterwards. This is the cleanest way to close a connection.
		1006
		1007	=cut
		1008
		1009	sub push_shutdown {
		1010	my ($self) = @_;
		1011
		1012	delete $self->{low_water_mark};
		1013	$self->on_drain (sub { shutdown $_[0]{fh}, 1 });
		1014	}
650		1015
651	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	1016	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
652		1017
653	This function (not method) lets you add your own types to C<push_write>.	1018	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	1019	Whenever the given C<type> is used, C<push_write> will invoke the code
…		…
748	=cut	1113	=cut
749		1114
750	sub _drain_rbuf {	1115	sub _drain_rbuf {
751	my ($self) = @_;	1116	my ($self) = @_;
752		1117
		1118	# avoid recursion
		1119	return if $self->{_skip_drain_rbuf};
753	local $self->{_in_drain} = 1;	1120	local $self->{_skip_drain_rbuf} = 1;
754
755	if (
756	defined $self->{rbuf_max}
757	&& $self->{rbuf_max} < length $self->{rbuf}
758	) {
759	$self->_error (&Errno::ENOSPC, 1), return;
760	}
761		1121
762	while () {	1122	while () {
		1123	# we need to use a separate tls read buffer, as we must not receive data while
		1124	# we are draining the buffer, and this can only happen with TLS.
		1125	$self->{rbuf} .= delete $self->{_tls_rbuf}
		1126	if exists $self->{_tls_rbuf};
		1127
763	my $len = length $self->{rbuf};	1128	my $len = length $self->{rbuf};
764		1129
765	if (my $cb = shift @{ $self->{_queue} }) {	1130	if (my $cb = shift @{ $self->{_queue} }) {
766	unless ($cb->($self)) {	1131	unless ($cb->($self)) {
767	if ($self->{_eof}) {	1132	# no progress can be made
768	# no progress can be made (not enough data and no data forthcoming)	1133	# (not enough data and no data forthcoming)
769	$self->_error (&Errno::EPIPE, 1), return;	1134	$self->_error (Errno::EPIPE, 1), return
770	}	1135	if $self->{_eof};
771		1136
772	unshift @{ $self->{_queue} }, $cb;	1137	unshift @{ $self->{_queue} }, $cb;
773	last;	1138	last;
774	}	1139	}
775	} elsif ($self->{on_read}) {	1140	} elsif ($self->{on_read}) {
…		…
782	&& !@{ $self->{_queue} } # and the queue is still empty	1147	&& !@{ $self->{_queue} } # and the queue is still empty
783	&& $self->{on_read} # but we still have on_read	1148	&& $self->{on_read} # but we still have on_read
784	) {	1149	) {
785	# no further data will arrive	1150	# no further data will arrive
786	# so no progress can be made	1151	# so no progress can be made
787	$self->_error (&Errno::EPIPE, 1), return	1152	$self->_error (Errno::EPIPE, 1), return
788	if $self->{_eof};	1153	if $self->{_eof};
789		1154
790	last; # more data might arrive	1155	last; # more data might arrive
791	}	1156	}
792	} else {	1157	} else {
…		…
795	last;	1160	last;
796	}	1161	}
797	}	1162	}
798		1163
799	if ($self->{_eof}) {	1164	if ($self->{_eof}) {
800	if ($self->{on_eof}) {	1165	$self->{on_eof}
801	$self->{on_eof}($self)	1166	? $self->{on_eof}($self)
802	} else {	1167	: $self->_error (0, 1, "Unexpected end-of-file");
803	$self->_error (0, 1);	1168
804	}	1169	return;
		1170	}
		1171
		1172	if (
		1173	defined $self->{rbuf_max}
		1174	&& $self->{rbuf_max} < length $self->{rbuf}
		1175	) {
		1176	$self->_error (Errno::ENOSPC, 1), return;
805	}	1177	}
806		1178
807	# may need to restart read watcher	1179	# may need to restart read watcher
808	unless ($self->{_rw}) {	1180	unless ($self->{_rw}) {
809	$self->start_read	1181	$self->start_read
…		…
821		1193
822	sub on_read {	1194	sub on_read {
823	my ($self, $cb) = @_;	1195	my ($self, $cb) = @_;
824		1196
825	$self->{on_read} = $cb;	1197	$self->{on_read} = $cb;
826	$self->_drain_rbuf if $cb && !$self->{_in_drain};	1198	$self->_drain_rbuf if $cb;
827	}	1199	}
828		1200
829	=item $handle->rbuf	1201	=item $handle->rbuf
830		1202
831	Returns the read buffer (as a modifiable lvalue).	1203	Returns the read buffer (as a modifiable lvalue).
832		1204
833	You can access the read buffer directly as the C<< ->{rbuf} >> member, if	1205	You can access the read buffer directly as the C<< ->{rbuf} >>
834	you want.	1206	member, if you want. However, the only operation allowed on the
		1207	read buffer (apart from looking at it) is removing data from its
		1208	beginning. Otherwise modifying or appending to it is not allowed and will
		1209	lead to hard-to-track-down bugs.
835		1210
836	NOTE: The read buffer should only be used or modified if the C<on_read>,	1211	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	1212	C<push_read> or C<unshift_read> methods are used. The other read methods
838	automatically manage the read buffer.	1213	automatically manage the read buffer.
839		1214
…		…
880	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	1255	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
881	->($self, $cb, @_);	1256	->($self, $cb, @_);
882	}	1257	}
883		1258
884	push @{ $self->{_queue} }, $cb;	1259	push @{ $self->{_queue} }, $cb;
885	$self->_drain_rbuf unless $self->{_in_drain};	1260	$self->_drain_rbuf;
886	}	1261	}
887		1262
888	sub unshift_read {	1263	sub unshift_read {
889	my $self = shift;	1264	my $self = shift;
890	my $cb = pop;	1265	my $cb = pop;
…		…
894		1269
895	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read")	1270	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read")
896	->($self, $cb, @_);	1271	->($self, $cb, @_);
897	}	1272	}
898		1273
899
900	unshift @{ $self->{_queue} }, $cb;	1274	unshift @{ $self->{_queue} }, $cb;
901	$self->_drain_rbuf unless $self->{_in_drain};	1275	$self->_drain_rbuf;
902	}	1276	}
903		1277
904	=item $handle->push_read (type => @args, $cb)	1278	=item $handle->push_read (type => @args, $cb)
905		1279
906	=item $handle->unshift_read (type => @args, $cb)	1280	=item $handle->unshift_read (type => @args, $cb)
…		…
1039	return 1;	1413	return 1;
1040	}	1414	}
1041		1415
1042	# reject	1416	# reject
1043	if ($reject && $$rbuf =~ $reject) {	1417	if ($reject && $$rbuf =~ $reject) {
1044	$self->_error (&Errno::EBADMSG);	1418	$self->_error (Errno::EBADMSG);
1045	}	1419	}
1046		1420
1047	# skip	1421	# skip
1048	if ($skip && $$rbuf =~ $skip) {	1422	if ($skip && $$rbuf =~ $skip) {
1049	$data .= substr $$rbuf, 0, $+[0], "";	1423	$data .= substr $$rbuf, 0, $+[0], "";
…		…
1065	my ($self, $cb) = @_;	1439	my ($self, $cb) = @_;
1066		1440
1067	sub {	1441	sub {
1068	unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) {	1442	unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) {
1069	if ($_[0]{rbuf} =~ /[^0-9]/) {	1443	if ($_[0]{rbuf} =~ /[^0-9]/) {
1070	$self->_error (&Errno::EBADMSG);	1444	$self->_error (Errno::EBADMSG);
1071	}	1445	}
1072	return;	1446	return;
1073	}	1447	}
1074		1448
1075	my $len = $1;	1449	my $len = $1;
…		…
1078	my $string = $_[1];	1452	my $string = $_[1];
1079	$_[0]->unshift_read (chunk => 1, sub {	1453	$_[0]->unshift_read (chunk => 1, sub {
1080	if ($_[1] eq ",") {	1454	if ($_[1] eq ",") {
1081	$cb->($_[0], $string);	1455	$cb->($_[0], $string);
1082	} else {	1456	} else {
1083	$self->_error (&Errno::EBADMSG);	1457	$self->_error (Errno::EBADMSG);
1084	}	1458	}
1085	});	1459	});
1086	});	1460	});
1087		1461
1088	1	1462	1
…		…
1135	}	1509	}
1136	};	1510	};
1137		1511
1138	=item json => $cb->($handle, $hash_or_arrayref)	1512	=item json => $cb->($handle, $hash_or_arrayref)
1139		1513
1140	Reads a JSON object or array, decodes it and passes it to the callback.	1514	Reads a JSON object or array, decodes it and passes it to the
		1515	callback. When a parse error occurs, an C<EBADMSG> error will be raised.
1141		1516
1142	If a C<json> object was passed to the constructor, then that will be used	1517	If a C<json> object was passed to the constructor, then that will be used
1143	for the final decode, otherwise it will create a JSON coder expecting UTF-8.	1518	for the final decode, otherwise it will create a JSON coder expecting UTF-8.
1144		1519
1145	This read type uses the incremental parser available with JSON version	1520	This read type uses the incremental parser available with JSON version
…		…
1154	=cut	1529	=cut
1155		1530
1156	register_read_type json => sub {	1531	register_read_type json => sub {
1157	my ($self, $cb) = @_;	1532	my ($self, $cb) = @_;
1158		1533
1159	require JSON;	1534	my $json = $self->{json} ||= json_coder;
1160		1535
1161	my $data;	1536	my $data;
1162	my $rbuf = \$self->{rbuf};	1537	my $rbuf = \$self->{rbuf};
1163		1538
1164	my $json = $self->{json} ||= JSON->new->utf8;
1165
1166	sub {	1539	sub {
1167	my $ref = $json->incr_parse ($self->{rbuf});	1540	my $ref = eval { $json->incr_parse ($self->{rbuf}) };
1168		1541
1169	if ($ref) {	1542	if ($ref) {
1170	$self->{rbuf} = $json->incr_text;	1543	$self->{rbuf} = $json->incr_text;
1171	$json->incr_text = "";	1544	$json->incr_text = "";
1172	$cb->($self, $ref);	1545	$cb->($self, $ref);
1173		1546
1174	1	1547	1
		1548	} elsif ($@) {
		1549	# error case
		1550	$json->incr_skip;
		1551
		1552	$self->{rbuf} = $json->incr_text;
		1553	$json->incr_text = "";
		1554
		1555	$self->_error (Errno::EBADMSG);
		1556
		1557	()
1175	} else {	1558	} else {
1176	$self->{rbuf} = "";	1559	$self->{rbuf} = "";
		1560
1177	()	1561	()
1178	}	1562	}
1179	}	1563	}
1180	};	1564	};
1181		1565
…		…
1213	# read remaining chunk	1597	# read remaining chunk
1214	$_[0]->unshift_read (chunk => $len, sub {	1598	$_[0]->unshift_read (chunk => $len, sub {
1215	if (my $ref = eval { Storable::thaw ($_[1]) }) {	1599	if (my $ref = eval { Storable::thaw ($_[1]) }) {
1216	$cb->($_[0], $ref);	1600	$cb->($_[0], $ref);
1217	} else {	1601	} else {
1218	$self->_error (&Errno::EBADMSG);	1602	$self->_error (Errno::EBADMSG);
1219	}	1603	}
1220	});	1604	});
1221	}	1605	}
1222		1606
1223	1	1607	1
…		…
1275	my ($self) = @_;	1659	my ($self) = @_;
1276		1660
1277	unless ($self->{_rw} || $self->{_eof}) {	1661	unless ($self->{_rw} || $self->{_eof}) {
1278	Scalar::Util::weaken $self;	1662	Scalar::Util::weaken $self;
1279		1663
1280	$self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {	1664	$self->{_rw} = AE::io $self->{fh}, 0, sub {
1281	my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf});	1665	my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf});
1282	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf;	1666	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf;
1283		1667
1284	if ($len > 0) {	1668	if ($len > 0) {
1285	$self->{_activity} = AnyEvent->now;	1669	$self->{_activity} = $self->{_ractivity} = AE::now;
1286		1670
1287	if ($self->{tls}) {	1671	if ($self->{tls}) {
1288	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);	1672	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);
1289		1673
1290	&_dotls ($self);	1674	&_dotls ($self);
1291	} else {	1675	} else {
1292	$self->_drain_rbuf unless $self->{_in_drain};	1676	$self->_drain_rbuf;
1293	}	1677	}
1294		1678
1295	} elsif (defined $len) {	1679	} elsif (defined $len) {
1296	delete $self->{_rw};	1680	delete $self->{_rw};
1297	$self->{_eof} = 1;	1681	$self->{_eof} = 1;
1298	$self->_drain_rbuf unless $self->{_in_drain};	1682	$self->_drain_rbuf;
1299		1683
1300	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	1684	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
1301	return $self->_error ($!, 1);	1685	return $self->_error ($!, 1);
1302	}	1686	}
1303	});	1687	};
		1688	}
		1689	}
		1690
		1691	our $ERROR_SYSCALL;
		1692	our $ERROR_WANT_READ;
		1693
		1694	sub _tls_error {
		1695	my ($self, $err) = @_;
		1696
		1697	return $self->_error ($!, 1)
		1698	if $err == Net::SSLeay::ERROR_SYSCALL ();
		1699
		1700	my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ());
		1701
		1702	# reduce error string to look less scary
		1703	$err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /;
		1704
		1705	if ($self->{_on_starttls}) {
		1706	(delete $self->{_on_starttls})->($self, undef, $err);
		1707	&_freetls;
		1708	} else {
		1709	&_freetls;
		1710	$self->_error (Errno::EPROTO, 1, $err);
1304	}	1711	}
1305	}	1712	}
1306		1713
1307	# poll the write BIO and send the data if applicable	1714	# poll the write BIO and send the data if applicable
		1715	# also decode read data if possible
		1716	# this is basiclaly our TLS state machine
		1717	# more efficient implementations are possible with openssl,
		1718	# but not with the buggy and incomplete Net::SSLeay.
1308	sub _dotls {	1719	sub _dotls {
1309	my ($self) = @_;	1720	my ($self) = @_;
1310		1721
1311	my $tmp;	1722	my $tmp;
1312		1723
1313	if (length $self->{_tls_wbuf}) {	1724	if (length $self->{_tls_wbuf}) {
1314	while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {	1725	while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
1315	substr $self->{_tls_wbuf}, 0, $tmp, "";	1726	substr $self->{_tls_wbuf}, 0, $tmp, "";
1316	}	1727	}
		1728
		1729	$tmp = Net::SSLeay::get_error ($self->{tls}, $tmp);
		1730	return $self->_tls_error ($tmp)
		1731	if $tmp != $ERROR_WANT_READ
		1732	&& ($tmp != $ERROR_SYSCALL || $!);
1317	}	1733	}
1318		1734
1319	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {	1735	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {
1320	unless (length $tmp) {	1736	unless (length $tmp) {
1321	# let's treat SSL-eof as we treat normal EOF	1737	$self->{_on_starttls}
1322	delete $self->{_rw};	1738	and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ???
1323	$self->{_eof} = 1;
1324	&_freetls;	1739	&_freetls;
		1740
		1741	if ($self->{on_stoptls}) {
		1742	$self->{on_stoptls}($self);
		1743	return;
		1744	} else {
		1745	# let's treat SSL-eof as we treat normal EOF
		1746	delete $self->{_rw};
		1747	$self->{_eof} = 1;
		1748	}
1325	}	1749	}
1326		1750
1327	$self->{rbuf} .= $tmp;	1751	$self->{_tls_rbuf} .= $tmp;
1328	$self->_drain_rbuf unless $self->{_in_drain};	1752	$self->_drain_rbuf;
1329	$self->{tls} or return; # tls session might have gone away in callback	1753	$self->{tls} or return; # tls session might have gone away in callback
1330	}	1754	}
1331		1755
1332	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);	1756	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);
1333
1334	if ($tmp != Net::SSLeay::ERROR_WANT_READ ()) {
1335	if ($tmp == Net::SSLeay::ERROR_SYSCALL ()) {
1336	return $self->_error ($!, 1);	1757	return $self->_tls_error ($tmp)
1337	} elsif ($tmp == Net::SSLeay::ERROR_SSL ()) {	1758	if $tmp != $ERROR_WANT_READ
1338	return $self->_error (&Errno::EIO, 1);	1759	&& ($tmp != $ERROR_SYSCALL || $!);
1339	}
1340
1341	# all other errors are fine for our purposes
1342	}
1343		1760
1344	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {	1761	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {
1345	$self->{wbuf} .= $tmp;	1762	$self->{wbuf} .= $tmp;
1346	$self->_drain_wbuf;	1763	$self->_drain_wbuf;
1347	}	1764	}
		1765
		1766	$self->{_on_starttls}
		1767	and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK ()
		1768	and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established");
1348	}	1769	}
1349		1770
1350	=item $handle->starttls ($tls[, $tls_ctx])	1771	=item $handle->starttls ($tls[, $tls_ctx])
1351		1772
1352	Instead of starting TLS negotiation immediately when the AnyEvent::Handle	1773	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	1774	object is created, you can also do that at a later time by calling
1354	C<starttls>.	1775	C<starttls>.
1355		1776
		1777	Starting TLS is currently an asynchronous operation - when you push some
		1778	write data and then call C<< ->starttls >> then TLS negotiation will start
		1779	immediately, after which the queued write data is then sent.
		1780
1356	The first argument is the same as the C<tls> constructor argument (either	1781	The first argument is the same as the C<tls> constructor argument (either
1357	C<"connect">, C<"accept"> or an existing Net::SSLeay object).	1782	C<"connect">, C<"accept"> or an existing Net::SSLeay object).
1358		1783
1359	The second argument is the optional C<Net::SSLeay::CTX> object that is	1784	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.	1785	when AnyEvent::Handle has to create its own TLS connection object, or
		1786	a hash reference with C<< key => value >> pairs that will be used to
		1787	construct a new context.
1361		1788
1362	The TLS connection object will end up in C<< $handle->{tls} >> after this	1789	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	1790	context in C<< $handle->{tls_ctx} >> after this call and can be used or
1364	might have already started when this function returns.	1791	changed to your liking. Note that the handshake might have already started
		1792	when this function returns.
1365		1793
1366	If it an error to start a TLS handshake more than once per	1794	Due to bugs in OpenSSL, it might or might not be possible to do multiple
1367	AnyEvent::Handle object (this is due to bugs in OpenSSL).	1795	handshakes on the same stream. Best do not attempt to use the stream after
		1796	stopping TLS.
1368		1797
1369	=cut	1798	=cut
		1799
		1800	our %TLS_CACHE; #TODO not yet documented, should we?
1370		1801
1371	sub starttls {	1802	sub starttls {
1372	my ($self, $ssl, $ctx) = @_;	1803	my ($self, $tls, $ctx) = @_;
		1804
		1805	Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught"
		1806	if $self->{tls};
		1807
		1808	$self->{tls} = $tls;
		1809	$self->{tls_ctx} = $ctx if @_ > 2;
		1810
		1811	return unless $self->{fh};
1373		1812
1374	require Net::SSLeay;	1813	require Net::SSLeay;
1375		1814
1376	Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object"	1815	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();
1377	if $self->{tls};	1816	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();
		1817
		1818	$tls = delete $self->{tls};
		1819	$ctx = $self->{tls_ctx};
		1820
		1821	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session
		1822
		1823	if ("HASH" eq ref $ctx) {
		1824	require AnyEvent::TLS;
		1825
		1826	if ($ctx->{cache}) {
		1827	my $key = $ctx+0;
		1828	$ctx = $TLS_CACHE{$key} ||= new AnyEvent::TLS %$ctx;
		1829	} else {
		1830	$ctx = new AnyEvent::TLS %$ctx;
		1831	}
		1832	}
1378		1833
1379	if ($ssl eq "accept") {	1834	$self->{tls_ctx} = $ctx || TLS_CTX ();
1380	$ssl = Net::SSLeay::new ($ctx || TLS_CTX ());	1835	$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} = $ssl;
1388		1836
1389	# basically, this is deep magic (because SSL_read should have the same issues)	1837	# basically, this is deep magic (because SSL_read should have the same issues)
1390	# but the openssl maintainers basically said: "trust us, it just works".	1838	# but the openssl maintainers basically said: "trust us, it just works".
1391	# (unfortunately, we have to hardcode constants because the abysmally misdesigned	1839	# (unfortunately, we have to hardcode constants because the abysmally misdesigned
1392	# and mismaintained ssleay-module doesn't even offer them).	1840	# and mismaintained ssleay-module doesn't even offer them).
…		…
1396	#	1844	#
1397	# note that we do not try to keep the length constant between writes as we are required to do.	1845	# note that we do not try to keep the length constant between writes as we are required to do.
1398	# we assume that most (but not all) of this insanity only applies to non-blocking cases,	1846	# we assume that most (but not all) of this insanity only applies to non-blocking cases,
1399	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to	1847	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to
1400	# have identity issues in that area.	1848	# have identity issues in that area.
1401	Net::SSLeay::CTX_set_mode ($self->{tls},	1849	# Net::SSLeay::CTX_set_mode ($ssl,
1402	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1)	1850	# (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1)
1403	| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2));	1851	# | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2));
		1852	Net::SSLeay::CTX_set_mode ($tls, 1|2);
1404		1853
1405	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1854	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1406	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1855	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1407		1856
		1857	Net::SSLeay::BIO_write ($self->{_rbio}, delete $self->{rbuf});
		1858
1408	Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});	1859	Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio});
		1860
		1861	$self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) }
		1862	if $self->{on_starttls};
1409		1863
1410	&_dotls; # need to trigger the initial handshake	1864	&_dotls; # need to trigger the initial handshake
1411	$self->start_read; # make sure we actually do read	1865	$self->start_read; # make sure we actually do read
1412	}	1866	}
1413		1867
1414	=item $handle->stoptls	1868	=item $handle->stoptls
1415		1869
1416	Shuts down the SSL connection - this makes a proper EOF handshake by	1870	Shuts down the SSL connection - this makes a proper EOF handshake by
1417	sending a close notify to the other side, but since OpenSSL doesn't	1871	sending a close notify to the other side, but since OpenSSL doesn't
1418	support non-blocking shut downs, it is not possible to re-use the stream	1872	support non-blocking shut downs, it is not guarenteed that you can re-use
1419	afterwards.	1873	the stream afterwards.
1420		1874
1421	=cut	1875	=cut
1422		1876
1423	sub stoptls {	1877	sub stoptls {
1424	my ($self) = @_;	1878	my ($self) = @_;
…		…
1426	if ($self->{tls}) {	1880	if ($self->{tls}) {
1427	Net::SSLeay::shutdown ($self->{tls});	1881	Net::SSLeay::shutdown ($self->{tls});
1428		1882
1429	&_dotls;	1883	&_dotls;
1430		1884
1431	# we don't give a shit. no, we do, but we can't. no...	1885	# # we don't give a shit. no, we do, but we can't. no...#d#
1432	# we, we... have to use openssl :/	1886	# # we, we... have to use openssl :/#d#
1433	&_freetls;	1887	# &_freetls;#d#
1434	}	1888	}
1435	}	1889	}
1436		1890
1437	sub _freetls {	1891	sub _freetls {
1438	my ($self) = @_;	1892	my ($self) = @_;
1439		1893
1440	return unless $self->{tls};	1894	return unless $self->{tls};
1441		1895
1442	Net::SSLeay::free (delete $self->{tls});	1896	$self->{tls_ctx}->_put_session (delete $self->{tls})
		1897	if $self->{tls} > 0;
1443		1898
1444	delete @$self{qw(_rbio _wbio _tls_wbuf)};	1899	delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)};
1445	}	1900	}
1446		1901
1447	sub DESTROY {	1902	sub DESTROY {
1448	my $self = shift;	1903	my ($self) = @_;
1449		1904
1450	&_freetls;	1905	&_freetls;
1451		1906
1452	my $linger = exists $self->{linger} ? $self->{linger} : 3600;	1907	my $linger = exists $self->{linger} ? $self->{linger} : 3600;
1453		1908
1454	if ($linger && length $self->{wbuf}) {	1909	if ($linger && length $self->{wbuf} && $self->{fh}) {
1455	my $fh = delete $self->{fh};	1910	my $fh = delete $self->{fh};
1456	my $wbuf = delete $self->{wbuf};	1911	my $wbuf = delete $self->{wbuf};
1457		1912
1458	my @linger;	1913	my @linger;
1459		1914
1460	push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub {	1915	push @linger, AE::io $fh, 1, sub {
1461	my $len = syswrite $fh, $wbuf, length $wbuf;	1916	my $len = syswrite $fh, $wbuf, length $wbuf;
1462		1917
1463	if ($len > 0) {	1918	if ($len > 0) {
1464	substr $wbuf, 0, $len, "";	1919	substr $wbuf, 0, $len, "";
1465	} else {	1920	} else {
1466	@linger = (); # end	1921	@linger = (); # end
1467	}	1922	}
1468	});	1923	};
1469	push @linger, AnyEvent->timer (after => $linger, cb => sub {	1924	push @linger, AE::timer $linger, 0, sub {
1470	@linger = ();	1925	@linger = ();
1471	});	1926	};
1472	}	1927	}
1473	}	1928	}
1474		1929
1475	=item $handle->destroy	1930	=item $handle->destroy
1476		1931
1477	Shuts down the handle object as much as possible - this call ensures that	1932	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	1933	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.	1934	will be freed. Any method you will call on the handle object after
		1935	destroying it in this way will be silently ignored (and it will return the
		1936	empty list).
1480		1937
1481	Normally, you can just "forget" any references to an AnyEvent::Handle	1938	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	1939	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	1940	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	1941	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	1942	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in
1486	that case.	1943	that case.
1487		1944
		1945	Destroying the handle object in this way has the advantage that callbacks
		1946	will be removed as well, so if those are the only reference holders (as
		1947	is common), then one doesn't need to do anything special to break any
		1948	reference cycles.
		1949
1488	The handle might still linger in the background and write out remaining	1950	The handle might still linger in the background and write out remaining
1489	data, as specified by the C<linger> option, however.	1951	data, as specified by the C<linger> option, however.
1490		1952
1491	=cut	1953	=cut
1492		1954
1493	sub destroy {	1955	sub destroy {
1494	my ($self) = @_;	1956	my ($self) = @_;
1495		1957
1496	$self->DESTROY;	1958	$self->DESTROY;
1497	%$self = ();	1959	%$self = ();
		1960	bless $self, "AnyEvent::Handle::destroyed";
		1961	}
		1962
		1963	sub AnyEvent::Handle::destroyed::AUTOLOAD {
		1964	#nop
1498	}	1965	}
1499		1966
1500	=item AnyEvent::Handle::TLS_CTX	1967	=item AnyEvent::Handle::TLS_CTX
1501		1968
1502	This function creates and returns the Net::SSLeay::CTX object used by	1969	This function creates and returns the AnyEvent::TLS object used by default
1503	default for TLS mode.	1970	for TLS mode.
1504		1971
1505	The context is created like this:	1972	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		1973
1515	=cut	1974	=cut
1516		1975
1517	our $TLS_CTX;	1976	our $TLS_CTX;
1518		1977
1519	sub TLS_CTX() {	1978	sub TLS_CTX() {
1520	$TLS_CTX || do {	1979	$TLS_CTX ||= do {
1521	require Net::SSLeay;	1980	require AnyEvent::TLS;
1522		1981
1523	Net::SSLeay::load_error_strings ();	1982	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	}	1983	}
1533	}	1984	}
1534		1985
1535	=back	1986	=back
1536		1987
…		…
1575		2026
1576	$handle->on_read (sub { });	2027	$handle->on_read (sub { });
1577	$handle->on_eof (undef);	2028	$handle->on_eof (undef);
1578	$handle->on_error (sub {	2029	$handle->on_error (sub {
1579	my $data = delete $_[0]{rbuf};	2030	my $data = delete $_[0]{rbuf};
1580	undef $handle;
1581	});	2031	});
1582		2032
1583	The reason to use C<on_error> is that TCP connections, due to latencies	2033	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	2034	and packets loss, might get closed quite violently with an error, when in
1585	fact, all data has been received.	2035	fact, all data has been received.
…		…
1601	$handle->on_drain (sub {	2051	$handle->on_drain (sub {
1602	warn "all data submitted to the kernel\n";	2052	warn "all data submitted to the kernel\n";
1603	undef $handle;	2053	undef $handle;
1604	});	2054	});
1605		2055
		2056	If you just want to queue some data and then signal EOF to the other side,
		2057	consider using C<< ->push_shutdown >> instead.
		2058
		2059	=item I want to contact a TLS/SSL server, I don't care about security.
		2060
		2061	If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS,
		2062	simply connect to it and then create the AnyEvent::Handle with the C<tls>
		2063	parameter:
		2064
		2065	tcp_connect $host, $port, sub {
		2066	my ($fh) = @_;
		2067
		2068	my $handle = new AnyEvent::Handle
		2069	fh => $fh,
		2070	tls => "connect",
		2071	on_error => sub { ... };
		2072
		2073	$handle->push_write (...);
		2074	};
		2075
		2076	=item I want to contact a TLS/SSL server, I do care about security.
		2077
		2078	Then you should additionally enable certificate verification, including
		2079	peername verification, if the protocol you use supports it (see
		2080	L<AnyEvent::TLS>, C<verify_peername>).
		2081
		2082	E.g. for HTTPS:
		2083
		2084	tcp_connect $host, $port, sub {
		2085	my ($fh) = @_;
		2086
		2087	my $handle = new AnyEvent::Handle
		2088	fh => $fh,
		2089	peername => $host,
		2090	tls => "connect",
		2091	tls_ctx => { verify => 1, verify_peername => "https" },
		2092	...
		2093
		2094	Note that you must specify the hostname you connected to (or whatever
		2095	"peername" the protocol needs) as the C<peername> argument, otherwise no
		2096	peername verification will be done.
		2097
		2098	The above will use the system-dependent default set of trusted CA
		2099	certificates. If you want to check against a specific CA, add the
		2100	C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>:
		2101
		2102	tls_ctx => {
		2103	verify => 1,
		2104	verify_peername => "https",
		2105	ca_file => "my-ca-cert.pem",
		2106	},
		2107
		2108	=item I want to create a TLS/SSL server, how do I do that?
		2109
		2110	Well, you first need to get a server certificate and key. You have
		2111	three options: a) ask a CA (buy one, use cacert.org etc.) b) create a
		2112	self-signed certificate (cheap. check the search engine of your choice,
		2113	there are many tutorials on the net) or c) make your own CA (tinyca2 is a
		2114	nice program for that purpose).
		2115
		2116	Then create a file with your private key (in PEM format, see
		2117	L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The
		2118	file should then look like this:
		2119
		2120	-----BEGIN RSA PRIVATE KEY-----
		2121	...header data
		2122	... lots of base64'y-stuff
		2123	-----END RSA PRIVATE KEY-----
		2124
		2125	-----BEGIN CERTIFICATE-----
		2126	... lots of base64'y-stuff
		2127	-----END CERTIFICATE-----
		2128
		2129	The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then
		2130	specify this file as C<cert_file>:
		2131
		2132	tcp_server undef, $port, sub {
		2133	my ($fh) = @_;
		2134
		2135	my $handle = new AnyEvent::Handle
		2136	fh => $fh,
		2137	tls => "accept",
		2138	tls_ctx => { cert_file => "my-server-keycert.pem" },
		2139	...
		2140
		2141	When you have intermediate CA certificates that your clients might not
		2142	know about, just append them to the C<cert_file>.
		2143
1606	=back	2144	=back
1607		2145
1608		2146
1609	=head1 SUBCLASSING AnyEvent::Handle	2147	=head1 SUBCLASSING AnyEvent::Handle
1610		2148

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