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

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.134 by root, Fri Jul 3 00:09:04 2009 UTC vs.
Revision 1.177 by root, Sun Aug 9 00:24:35 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 = 4.45;
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; $hdl = new AnyEvent::Handle
29	AnyEvent::Handle->new (
30	fh => \*STDIN,	13	fh => \*STDIN,
31	on_eof => sub {	14	on_error => sub {
		15	my ($hdl, $fatal, $msg) = @_;
		16	warn "got error $msg\n";
		17	$hdl->destroy;
32	$cv->send;	18	$cv->send;
33	},
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 $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value...	69	=item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value...
69		70
70	The constructor supports these arguments (all as C<< 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, $message)
101
102	This is the error callback, which is called when, well, some error
103	occured, such as not being able to resolve the hostname, failure to
104	connect or a read error.
105
106	Some errors are fatal (which is indicated by C<$fatal> being true). On
107	fatal errors the handle object will be shut down and will not be usable
108	(but you are free to look at the current C<< ->rbuf >>). Examples of fatal
109	errors are an EOF condition with active (but unsatisifable) read watchers
110	(C<EPIPE>) or I/O errors.
111
112	AnyEvent::Handle tries to find an appropriate error code for you to check
113	against, but in some cases (TLS errors), this does not work well. It is
114	recommended to always output the C<$message> argument in human-readable
115	error messages (it's usually the same as C<"$!">).
116
117	Non-fatal errors can be retried by simply returning, but it is recommended
118	to simply ignore this parameter and instead abondon the handle object
119	when this callback is invoked. Examples of non-fatal errors are timeouts
120	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
121
122	On callback entrance, the value of C<$!> contains the operating system
123	error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or
124	C<EPROTO>).
125
126	While not mandatory, it is I<highly> recommended to set this callback, as
127	you will not be notified of errors otherwise. The default simply calls
128	C<croak>.
129
130	=item on_read => $cb->($handle)
131
132	This sets the default read callback, which is called when data arrives
133	and no read request is in the queue (unlike read queue callbacks, this
134	callback will only be called when at least one octet of data is in the
135	read buffer).
136
137	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
138	method or access the C<$handle->{rbuf}> member directly. Note that you
139	must not enlarge or modify the read buffer, you can only remove data at
140	the beginning from it.
141
142	When an EOF condition is detected then AnyEvent::Handle will first try to
143	feed all the remaining data to the queued callbacks and C<on_read> before
144	calling the C<on_eof> callback. If no progress can be made, then a fatal
145	error will be raised (with C<$!> set to C<EPIPE>).
146		206
147	=item on_drain => $cb->($handle)	207	=item on_drain => $cb->($handle)
148		208
149	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
150	(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).
157	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
158	the file when the write queue becomes empty.	218	the file when the write queue becomes empty.
159		219
160	=item timeout => $fractional_seconds	220	=item timeout => $fractional_seconds
161		221
		222	=item rtimeout => $fractional_seconds
		223
		224	=item wtimeout => $fractional_seconds
		225
162	If non-zero, then this enables an "inactivity" timeout: whenever this many	226	If non-zero, then these enables an "inactivity" timeout: whenever this
163	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
164	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
165	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>.
166		237
167	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
168	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
169	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
170	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
…		…
249		320
250	A string used to identify the remote site - usually the DNS hostname	321	A string used to identify the remote site - usually the DNS hostname
251	(I<not> IDN!) used to create the connection, rarely the IP address.	322	(I<not> IDN!) used to create the connection, rarely the IP address.
252		323
253	Apart from being useful in error messages, this string is also used in TLS	324	Apart from being useful in error messages, this string is also used in TLS
254	common name verification (see C<verify_cn> in L<AnyEvent::TLS>).	325	peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This
		326	verification will be skipped when C<peername> is not specified or
		327	C<undef>.
255		328
256	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object	329	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
257		330
258	When this parameter is given, it enables TLS (SSL) mode, that means	331	When this parameter is given, it enables TLS (SSL) mode, that means
259	AnyEvent will start a TLS handshake as soon as the conenction has been	332	AnyEvent will start a TLS handshake as soon as the conenction has been
…		…
296		369
297	Instead of an object, you can also specify a hash reference with C<< key	370	Instead of an object, you can also specify a hash reference with C<< key
298	=> value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a	371	=> value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a
299	new TLS context object.	372	new TLS context object.
300		373
		374	=item on_starttls => $cb->($handle, $success[, $error_message])
		375
		376	This callback will be invoked when the TLS/SSL handshake has finished. If
		377	C<$success> is true, then the TLS handshake succeeded, otherwise it failed
		378	(C<on_stoptls> will not be called in this case).
		379
		380	The session in C<< $handle->{tls} >> can still be examined in this
		381	callback, even when the handshake was not successful.
		382
		383	TLS handshake failures will not cause C<on_error> to be invoked when this
		384	callback is in effect, instead, the error message will be passed to C<on_starttls>.
		385
		386	Without this callback, handshake failures lead to C<on_error> being
		387	called, as normal.
		388
		389	Note that you cannot call C<starttls> right again in this callback. If you
		390	need to do that, start an zero-second timer instead whose callback can
		391	then call C<< ->starttls >> again.
		392
		393	=item on_stoptls => $cb->($handle)
		394
		395	When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is
		396	set, then it will be invoked after freeing the TLS session. If it is not,
		397	then a TLS shutdown condition will be treated like a normal EOF condition
		398	on the handle.
		399
		400	The session in C<< $handle->{tls} >> can still be examined in this
		401	callback.
		402
		403	This callback will only be called on TLS shutdowns, not when the
		404	underlying handle signals EOF.
		405
301	=item json => JSON or JSON::XS object	406	=item json => JSON or JSON::XS object
302		407
303	This is the json coder object used by the C<json> read and write types.	408	This is the json coder object used by the C<json> read and write types.
304		409
305	If you don't supply it, then AnyEvent::Handle will create and use a	410	If you don't supply it, then AnyEvent::Handle will create and use a
…		…
315		420
316	sub new {	421	sub new {
317	my $class = shift;	422	my $class = shift;
318	my $self = bless { @_ }, $class;	423	my $self = bless { @_ }, $class;
319		424
320	$self->{fh} or Carp::croak "mandatory argument fh is missing";	425	if ($self->{fh}) {
		426	$self->_start;
		427	return unless $self->{fh}; # could be gone by now
		428
		429	} elsif ($self->{connect}) {
		430	require AnyEvent::Socket;
		431
		432	$self->{peername} = $self->{connect}[0]
		433	unless exists $self->{peername};
		434
		435	$self->{_skip_drain_rbuf} = 1;
		436
		437	{
		438	Scalar::Util::weaken (my $self = $self);
		439
		440	$self->{_connect} =
		441	AnyEvent::Socket::tcp_connect (
		442	$self->{connect}[0],
		443	$self->{connect}[1],
		444	sub {
		445	my ($fh, $host, $port, $retry) = @_;
		446
		447	if ($fh) {
		448	$self->{fh} = $fh;
		449
		450	delete $self->{_skip_drain_rbuf};
		451	$self->_start;
		452
		453	$self->{on_connect}
		454	and $self->{on_connect}($self, $host, $port, sub {
		455	delete @$self{qw(fh _tw _ww _rw _eof _queue rbuf _wbuf tls _tls_rbuf _tls_wbuf)};
		456	$self->{_skip_drain_rbuf} = 1;
		457	&$retry;
		458	});
		459
		460	} else {
		461	if ($self->{on_connect_error}) {
		462	$self->{on_connect_error}($self, "$!");
		463	$self->destroy;
		464	} else {
		465	$self->_error ($!, 1);
		466	}
		467	}
		468	},
		469	sub {
		470	local $self->{fh} = $_[0];
		471
		472	$self->{on_prepare}
		473	? $self->{on_prepare}->($self)
		474	: ()
		475	}
		476	);
		477	}
		478
		479	} else {
		480	Carp::croak "AnyEvent::Handle: either an existing fh or the connect parameter must be specified";
		481	}
		482
		483	$self
		484	}
		485
		486	sub _start {
		487	my ($self) = @_;
321		488
322	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;	489	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;
323		490
		491	$self->{_activity} =
		492	$self->{_ractivity} =
324	$self->{_activity} = AnyEvent->now;	493	$self->{_wactivity} = AE::now;
325	$self->_timeout;	494
		495	$self->timeout (delete $self->{timeout} ) if $self->{timeout};
		496	$self->rtimeout (delete $self->{rtimeout}) if $self->{rtimeout};
		497	$self->wtimeout (delete $self->{wtimeout}) if $self->{wtimeout};
326		498
327	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};	499	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};
328		500
329	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})	501	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})
330	if $self->{tls};	502	if $self->{tls};
331		503
332	$self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain};	504	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};
333		505
334	$self->start_read	506	$self->start_read
335	if $self->{on_read};	507	if $self->{on_read} \|\| @{ $self->{_queue} };
336		508
337	$self->{fh} && $self	509	$self->_drain_wbuf;
338	}	510	}
339		511
340	sub _shutdown {	512	#sub _shutdown {
341	my ($self) = @_;	513	# my ($self) = @_;
342		514	#
343	delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)};	515	# delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)};
344	$self->{_eof} = 1; # tell starttls et. al to stop trying	516	# $self->{_eof} = 1; # tell starttls et. al to stop trying
345		517	#
346	&_freetls;	518	# &_freetls;
347	}	519	#}
348		520
349	sub _error {	521	sub _error {
350	my ($self, $errno, $fatal, $message) = @_;	522	my ($self, $errno, $fatal, $message) = @_;
351		523
352	$self->_shutdown
353	if $fatal;
354
355	$! = $errno;	524	$! = $errno;
356	$message \|\|= "$!";	525	$message \|\|= "$!";
357		526
358	if ($self->{on_error}) {	527	if ($self->{on_error}) {
359	$self->{on_error}($self, $fatal, $message);	528	$self->{on_error}($self, $fatal, $message);
		529	$self->destroy if $fatal;
360	} elsif ($self->{fh}) {	530	} elsif ($self->{fh}) {
		531	$self->destroy;
361	Carp::croak "AnyEvent::Handle uncaught error: $message";	532	Carp::croak "AnyEvent::Handle uncaught error: $message";
362	}	533	}
363	}	534	}
364		535
365	=item $fh = $handle->fh	536	=item $fh = $handle->fh
…		…
390	$_[0]{on_eof} = $_[1];	561	$_[0]{on_eof} = $_[1];
391	}	562	}
392		563
393	=item $handle->on_timeout ($cb)	564	=item $handle->on_timeout ($cb)
394		565
395	Replace the current C<on_timeout> callback, or disables the callback (but	566	=item $handle->on_rtimeout ($cb)
396	not the timeout) if C<$cb> = C<undef>. See the C<timeout> constructor
397	argument and method.
398		567
399	=cut	568	=item $handle->on_wtimeout ($cb)
400		569
401	sub on_timeout {	570	Replace the current C<on_timeout>, C<on_rtimeout> or C<on_wtimeout>
402	$_[0]{on_timeout} = $_[1];	571	callback, or disables the callback (but not the timeout) if C<$cb> =
403	}	572	C<undef>. See the C<timeout> constructor argument and method.
		573
		574	=cut
		575
		576	# see below
404		577
405	=item $handle->autocork ($boolean)	578	=item $handle->autocork ($boolean)
406		579
407	Enables or disables the current autocork behaviour (see C<autocork>	580	Enables or disables the current autocork behaviour (see C<autocork>
408	constructor argument). Changes will only take effect on the next write.	581	constructor argument). Changes will only take effect on the next write.
…		…
423	sub no_delay {	596	sub no_delay {
424	$_[0]{no_delay} = $_[1];	597	$_[0]{no_delay} = $_[1];
425		598
426	eval {	599	eval {
427	local $SIG{__DIE__};	600	local $SIG{__DIE__};
428	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1];	601	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]
		602	if $_[0]{fh};
429	};	603	};
430	}	604	}
431		605
		606	=item $handle->on_starttls ($cb)
		607
		608	Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument).
		609
		610	=cut
		611
		612	sub on_starttls {
		613	$_[0]{on_starttls} = $_[1];
		614	}
		615
		616	=item $handle->on_stoptls ($cb)
		617
		618	Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument).
		619
		620	=cut
		621
		622	sub on_starttls {
		623	$_[0]{on_stoptls} = $_[1];
		624	}
		625
		626	=item $handle->rbuf_max ($max_octets)
		627
		628	Configures the C<rbuf_max> setting (C<undef> disables it).
		629
		630	=cut
		631
		632	sub rbuf_max {
		633	$_[0]{rbuf_max} = $_[1];
		634	}
		635
432	#############################################################################	636	#############################################################################
433		637
434	=item $handle->timeout ($seconds)	638	=item $handle->timeout ($seconds)
435		639
		640	=item $handle->rtimeout ($seconds)
		641
		642	=item $handle->wtimeout ($seconds)
		643
436	Configures (or disables) the inactivity timeout.	644	Configures (or disables) the inactivity timeout.
437		645
438	=cut	646	=item $handle->timeout_reset
439		647
440	sub timeout {	648	=item $handle->rtimeout_reset
		649
		650	=item $handle->wtimeout_reset
		651
		652	Reset the activity timeout, as if data was received or sent.
		653
		654	These methods are cheap to call.
		655
		656	=cut
		657
		658	for my $dir ("", "r", "w") {
		659	my $timeout = "${dir}timeout";
		660	my $tw = "_${dir}tw";
		661	my $on_timeout = "on_${dir}timeout";
		662	my $activity = "_${dir}activity";
		663	my $cb;
		664
		665	*$on_timeout = sub {
		666	$_[0]{$on_timeout} = $_[1];
		667	};
		668
		669	*$timeout = sub {
441	my ($self, $timeout) = @_;	670	my ($self, $new_value) = @_;
442		671
443	$self->{timeout} = $timeout;	672	$self->{$timeout} = $new_value;
444	$self->_timeout;	673	delete $self->{$tw}; &$cb;
445	}	674	};
446		675
		676	*{"${dir}timeout_reset"} = sub {
		677	$_[0]{$activity} = AE::now;
		678	};
		679
		680	# main workhorse:
447	# reset the timeout watcher, as neccessary	681	# reset the timeout watcher, as neccessary
448	# also check for time-outs	682	# also check for time-outs
449	sub _timeout {	683	$cb = sub {
450	my ($self) = @_;	684	my ($self) = @_;
451		685
452	if ($self->{timeout}) {	686	if ($self->{$timeout} && $self->{fh}) {
453	my $NOW = AnyEvent->now;	687	my $NOW = AE::now;
454		688
455	# when would the timeout trigger?	689	# when would the timeout trigger?
456	my $after = $self->{_activity} + $self->{timeout} - $NOW;	690	my $after = $self->{$activity} + $self->{$timeout} - $NOW;
457		691
458	# now or in the past already?	692	# now or in the past already?
459	if ($after <= 0) {	693	if ($after <= 0) {
460	$self->{_activity} = $NOW;	694	$self->{$activity} = $NOW;
461		695
462	if ($self->{on_timeout}) {	696	if ($self->{$on_timeout}) {
463	$self->{on_timeout}($self);	697	$self->{$on_timeout}($self);
464	} else {	698	} else {
465	$self->_error (&Errno::ETIMEDOUT);	699	$self->_error (Errno::ETIMEDOUT);
		700	}
		701
		702	# callback could have changed timeout value, optimise
		703	return unless $self->{$timeout};
		704
		705	# calculate new after
		706	$after = $self->{$timeout};
466	}	707	}
467		708
468	# callback could have changed timeout value, optimise	709	Scalar::Util::weaken $self;
469	return unless $self->{timeout};	710	return unless $self; # ->error could have destroyed $self
470		711
471	# calculate new after	712	$self->{$tw} \|\|= AE::timer $after, 0, sub {
472	$after = $self->{timeout};	713	delete $self->{$tw};
		714	$cb->($self);
		715	};
		716	} else {
		717	delete $self->{$tw};
473	}	718	}
474
475	Scalar::Util::weaken $self;
476	return unless $self; # ->error could have destroyed $self
477
478	$self->{_tw} \|\|= AnyEvent->timer (after => $after, cb => sub {
479	delete $self->{_tw};
480	$self->_timeout;
481	});
482	} else {
483	delete $self->{_tw};
484	}	719	}
485	}	720	}
486		721
487	#############################################################################	722	#############################################################################
488		723
…		…
533	Scalar::Util::weaken $self;	768	Scalar::Util::weaken $self;
534		769
535	my $cb = sub {	770	my $cb = sub {
536	my $len = syswrite $self->{fh}, $self->{wbuf};	771	my $len = syswrite $self->{fh}, $self->{wbuf};
537		772
538	if ($len >= 0) {	773	if (defined $len) {
539	substr $self->{wbuf}, 0, $len, "";	774	substr $self->{wbuf}, 0, $len, "";
540		775
541	$self->{_activity} = AnyEvent->now;	776	$self->{_activity} = $self->{_wactivity} = AE::now;
542		777
543	$self->{on_drain}($self)	778	$self->{on_drain}($self)
544	if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf})	779	if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf})
545	&& $self->{on_drain};	780	&& $self->{on_drain};
546		781
…		…
552		787
553	# try to write data immediately	788	# try to write data immediately
554	$cb->() unless $self->{autocork};	789	$cb->() unless $self->{autocork};
555		790
556	# if still data left in wbuf, we need to poll	791	# if still data left in wbuf, we need to poll
557	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)	792	$self->{_ww} = AE::io $self->{fh}, 1, $cb
558	if length $self->{wbuf};	793	if length $self->{wbuf};
559	};	794	};
560	}	795	}
561		796
562	our %WH;	797	our %WH;
…		…
575	->($self, @_);	810	->($self, @_);
576	}	811	}
577		812
578	if ($self->{tls}) {	813	if ($self->{tls}) {
579	$self->{_tls_wbuf} .= $_[0];	814	$self->{_tls_wbuf} .= $_[0];
580		815	&_dotls ($self) if $self->{fh};
581	&_dotls ($self);
582	} else {	816	} else {
583	$self->{wbuf} .= $_[0];	817	$self->{wbuf} .= $_[0];
584	$self->_drain_wbuf;	818	$self->_drain_wbuf if $self->{fh};
585	}	819	}
586	}	820	}
587		821
588	=item $handle->push_write (type => @args)	822	=item $handle->push_write (type => @args)
589		823
…		…
683		917
684	=item $handle->push_shutdown	918	=item $handle->push_shutdown
685		919
686	Sometimes you know you want to close the socket after writing your data	920	Sometimes you know you want to close the socket after writing your data
687	before it was actually written. One way to do that is to replace your	921	before it was actually written. One way to do that is to replace your
688	C<on_drain> handler by a callback that shuts down the socket. This method	922	C<on_drain> handler by a callback that shuts down the socket (and set
689	is a shorthand for just that, and replaces the C<on_drain> callback with:	923	C<low_water_mark> to C<0>). This method is a shorthand for just that, and
		924	replaces the C<on_drain> callback with:
690		925
691	sub { shutdown $_[0]{fh}, 1 } # for push_shutdown	926	sub { shutdown $_[0]{fh}, 1 } # for push_shutdown
692		927
693	This simply shuts down the write side and signals an EOF condition to the	928	This simply shuts down the write side and signals an EOF condition to the
694	the peer.	929	the peer.
…		…
697	afterwards. This is the cleanest way to close a connection.	932	afterwards. This is the cleanest way to close a connection.
698		933
699	=cut	934	=cut
700		935
701	sub push_shutdown {	936	sub push_shutdown {
		937	my ($self) = @_;
		938
		939	delete $self->{low_water_mark};
702	$_[0]->{on_drain} = sub { shutdown $_[0]{fh}, 1 };	940	$self->on_drain (sub { shutdown $_[0]{fh}, 1 });
703	}	941	}
704		942
705	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	943	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
706		944
707	This function (not method) lets you add your own types to C<push_write>.	945	This function (not method) lets you add your own types to C<push_write>.
…		…
802	=cut	1040	=cut
803		1041
804	sub _drain_rbuf {	1042	sub _drain_rbuf {
805	my ($self) = @_;	1043	my ($self) = @_;
806		1044
		1045	# avoid recursion
		1046	return if $self->{_skip_drain_rbuf};
807	local $self->{_in_drain} = 1;	1047	local $self->{_skip_drain_rbuf} = 1;
808
809	if (
810	defined $self->{rbuf_max}
811	&& $self->{rbuf_max} < length $self->{rbuf}
812	) {
813	$self->_error (&Errno::ENOSPC, 1), return;
814	}
815		1048
816	while () {	1049	while () {
817	# we need to use a separate tls read buffer, as we must not receive data while	1050	# we need to use a separate tls read buffer, as we must not receive data while
818	# we are draining the buffer, and this can only happen with TLS.	1051	# we are draining the buffer, and this can only happen with TLS.
819	$self->{rbuf} .= delete $self->{_tls_rbuf} if exists $self->{_tls_rbuf};	1052	$self->{rbuf} .= delete $self->{_tls_rbuf}
		1053	if exists $self->{_tls_rbuf};
820		1054
821	my $len = length $self->{rbuf};	1055	my $len = length $self->{rbuf};
822		1056
823	if (my $cb = shift @{ $self->{_queue} }) {	1057	if (my $cb = shift @{ $self->{_queue} }) {
824	unless ($cb->($self)) {	1058	unless ($cb->($self)) {
825	if ($self->{_eof}) {	1059	# no progress can be made
826	# no progress can be made (not enough data and no data forthcoming)	1060	# (not enough data and no data forthcoming)
827	$self->_error (&Errno::EPIPE, 1), return;	1061	$self->_error (Errno::EPIPE, 1), return
828	}	1062	if $self->{_eof};
829		1063
830	unshift @{ $self->{_queue} }, $cb;	1064	unshift @{ $self->{_queue} }, $cb;
831	last;	1065	last;
832	}	1066	}
833	} elsif ($self->{on_read}) {	1067	} elsif ($self->{on_read}) {
…		…
840	&& !@{ $self->{_queue} } # and the queue is still empty	1074	&& !@{ $self->{_queue} } # and the queue is still empty
841	&& $self->{on_read} # but we still have on_read	1075	&& $self->{on_read} # but we still have on_read
842	) {	1076	) {
843	# no further data will arrive	1077	# no further data will arrive
844	# so no progress can be made	1078	# so no progress can be made
845	$self->_error (&Errno::EPIPE, 1), return	1079	$self->_error (Errno::EPIPE, 1), return
846	if $self->{_eof};	1080	if $self->{_eof};
847		1081
848	last; # more data might arrive	1082	last; # more data might arrive
849	}	1083	}
850	} else {	1084	} else {
…		…
853	last;	1087	last;
854	}	1088	}
855	}	1089	}
856		1090
857	if ($self->{_eof}) {	1091	if ($self->{_eof}) {
858	if ($self->{on_eof}) {	1092	$self->{on_eof}
859	$self->{on_eof}($self)	1093	? $self->{on_eof}($self)
860	} else {	1094	: $self->_error (0, 1, "Unexpected end-of-file");
861	$self->_error (0, 1);	1095
862	}	1096	return;
		1097	}
		1098
		1099	if (
		1100	defined $self->{rbuf_max}
		1101	&& $self->{rbuf_max} < length $self->{rbuf}
		1102	) {
		1103	$self->_error (Errno::ENOSPC, 1), return;
863	}	1104	}
864		1105
865	# may need to restart read watcher	1106	# may need to restart read watcher
866	unless ($self->{_rw}) {	1107	unless ($self->{_rw}) {
867	$self->start_read	1108	$self->start_read
…		…
879		1120
880	sub on_read {	1121	sub on_read {
881	my ($self, $cb) = @_;	1122	my ($self, $cb) = @_;
882		1123
883	$self->{on_read} = $cb;	1124	$self->{on_read} = $cb;
884	$self->_drain_rbuf if $cb && !$self->{_in_drain};	1125	$self->_drain_rbuf if $cb;
885	}	1126	}
886		1127
887	=item $handle->rbuf	1128	=item $handle->rbuf
888		1129
889	Returns the read buffer (as a modifiable lvalue).	1130	Returns the read buffer (as a modifiable lvalue).
…		…
941	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	1182	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
942	->($self, $cb, @_);	1183	->($self, $cb, @_);
943	}	1184	}
944		1185
945	push @{ $self->{_queue} }, $cb;	1186	push @{ $self->{_queue} }, $cb;
946	$self->_drain_rbuf unless $self->{_in_drain};	1187	$self->_drain_rbuf;
947	}	1188	}
948		1189
949	sub unshift_read {	1190	sub unshift_read {
950	my $self = shift;	1191	my $self = shift;
951	my $cb = pop;	1192	my $cb = pop;
…		…
957	->($self, $cb, @_);	1198	->($self, $cb, @_);
958	}	1199	}
959		1200
960		1201
961	unshift @{ $self->{_queue} }, $cb;	1202	unshift @{ $self->{_queue} }, $cb;
962	$self->_drain_rbuf unless $self->{_in_drain};	1203	$self->_drain_rbuf;
963	}	1204	}
964		1205
965	=item $handle->push_read (type => @args, $cb)	1206	=item $handle->push_read (type => @args, $cb)
966		1207
967	=item $handle->unshift_read (type => @args, $cb)	1208	=item $handle->unshift_read (type => @args, $cb)
…		…
1100	return 1;	1341	return 1;
1101	}	1342	}
1102		1343
1103	# reject	1344	# reject
1104	if ($reject && $$rbuf =~ $reject) {	1345	if ($reject && $$rbuf =~ $reject) {
1105	$self->_error (&Errno::EBADMSG);	1346	$self->_error (Errno::EBADMSG);
1106	}	1347	}
1107		1348
1108	# skip	1349	# skip
1109	if ($skip && $$rbuf =~ $skip) {	1350	if ($skip && $$rbuf =~ $skip) {
1110	$data .= substr $$rbuf, 0, $+[0], "";	1351	$data .= substr $$rbuf, 0, $+[0], "";
…		…
1126	my ($self, $cb) = @_;	1367	my ($self, $cb) = @_;
1127		1368
1128	sub {	1369	sub {
1129	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {	1370	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {
1130	if ($_[0]{rbuf} =~ /[^0-9]/) {	1371	if ($_[0]{rbuf} =~ /[^0-9]/) {
1131	$self->_error (&Errno::EBADMSG);	1372	$self->_error (Errno::EBADMSG);
1132	}	1373	}
1133	return;	1374	return;
1134	}	1375	}
1135		1376
1136	my $len = $1;	1377	my $len = $1;
…		…
1139	my $string = $_[1];	1380	my $string = $_[1];
1140	$_[0]->unshift_read (chunk => 1, sub {	1381	$_[0]->unshift_read (chunk => 1, sub {
1141	if ($_[1] eq ",") {	1382	if ($_[1] eq ",") {
1142	$cb->($_[0], $string);	1383	$cb->($_[0], $string);
1143	} else {	1384	} else {
1144	$self->_error (&Errno::EBADMSG);	1385	$self->_error (Errno::EBADMSG);
1145	}	1386	}
1146	});	1387	});
1147	});	1388	});
1148		1389
1149	1	1390	1
…		…
1216	=cut	1457	=cut
1217		1458
1218	register_read_type json => sub {	1459	register_read_type json => sub {
1219	my ($self, $cb) = @_;	1460	my ($self, $cb) = @_;
1220		1461
1221	require JSON;	1462	my $json = $self->{json} \|\|=
		1463	eval { require JSON::XS; JSON::XS->new->utf8 }
		1464	\|\| do { require JSON; JSON->new->utf8 };
1222		1465
1223	my $data;	1466	my $data;
1224	my $rbuf = \$self->{rbuf};	1467	my $rbuf = \$self->{rbuf};
1225
1226	my $json = $self->{json} \|\|= JSON->new->utf8;
1227		1468
1228	sub {	1469	sub {
1229	my $ref = eval { $json->incr_parse ($self->{rbuf}) };	1470	my $ref = eval { $json->incr_parse ($self->{rbuf}) };
1230		1471
1231	if ($ref) {	1472	if ($ref) {
…		…
1239	$json->incr_skip;	1480	$json->incr_skip;
1240		1481
1241	$self->{rbuf} = $json->incr_text;	1482	$self->{rbuf} = $json->incr_text;
1242	$json->incr_text = "";	1483	$json->incr_text = "";
1243		1484
1244	$self->_error (&Errno::EBADMSG);	1485	$self->_error (Errno::EBADMSG);
1245		1486
1246	()	1487	()
1247	} else {	1488	} else {
1248	$self->{rbuf} = "";	1489	$self->{rbuf} = "";
1249		1490
…		…
1286	# read remaining chunk	1527	# read remaining chunk
1287	$_[0]->unshift_read (chunk => $len, sub {	1528	$_[0]->unshift_read (chunk => $len, sub {
1288	if (my $ref = eval { Storable::thaw ($_[1]) }) {	1529	if (my $ref = eval { Storable::thaw ($_[1]) }) {
1289	$cb->($_[0], $ref);	1530	$cb->($_[0], $ref);
1290	} else {	1531	} else {
1291	$self->_error (&Errno::EBADMSG);	1532	$self->_error (Errno::EBADMSG);
1292	}	1533	}
1293	});	1534	});
1294	}	1535	}
1295		1536
1296	1	1537	1
…		…
1348	my ($self) = @_;	1589	my ($self) = @_;
1349		1590
1350	unless ($self->{_rw} \|\| $self->{_eof}) {	1591	unless ($self->{_rw} \|\| $self->{_eof}) {
1351	Scalar::Util::weaken $self;	1592	Scalar::Util::weaken $self;
1352		1593
1353	$self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {	1594	$self->{_rw} = AE::io $self->{fh}, 0, sub {
1354	my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf});	1595	my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf});
1355	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} \|\| 8192, length $$rbuf;	1596	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} \|\| 8192, length $$rbuf;
1356		1597
1357	if ($len > 0) {	1598	if ($len > 0) {
1358	$self->{_activity} = AnyEvent->now;	1599	$self->{_activity} = $self->{_ractivity} = AE::now;
1359		1600
1360	if ($self->{tls}) {	1601	if ($self->{tls}) {
1361	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);	1602	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);
1362		1603
1363	&_dotls ($self);	1604	&_dotls ($self);
1364	} else {	1605	} else {
1365	$self->_drain_rbuf unless $self->{_in_drain};	1606	$self->_drain_rbuf;
1366	}	1607	}
1367		1608
1368	} elsif (defined $len) {	1609	} elsif (defined $len) {
1369	delete $self->{_rw};	1610	delete $self->{_rw};
1370	$self->{_eof} = 1;	1611	$self->{_eof} = 1;
1371	$self->_drain_rbuf unless $self->{_in_drain};	1612	$self->_drain_rbuf;
1372		1613
1373	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	1614	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
1374	return $self->_error ($!, 1);	1615	return $self->_error ($!, 1);
1375	}	1616	}
1376	});	1617	};
1377	}	1618	}
1378	}	1619	}
1379		1620
1380	our $ERROR_SYSCALL;	1621	our $ERROR_SYSCALL;
1381	our $ERROR_WANT_READ;	1622	our $ERROR_WANT_READ;
1382	our $ERROR_ZERO_RETURN;
1383		1623
1384	sub _tls_error {	1624	sub _tls_error {
1385	my ($self, $err) = @_;	1625	my ($self, $err) = @_;
1386	warn "$err,$!\n";#d#
1387		1626
1388	return $self->_error ($!, 1)	1627	return $self->_error ($!, 1)
1389	if $err == Net::SSLeay::ERROR_SYSCALL ();	1628	if $err == Net::SSLeay::ERROR_SYSCALL ();
1390		1629
		1630	my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ());
		1631
		1632	# reduce error string to look less scary
		1633	$err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /;
		1634
		1635	if ($self->{_on_starttls}) {
		1636	(delete $self->{_on_starttls})->($self, undef, $err);
		1637	&_freetls;
		1638	} else {
		1639	&_freetls;
1391	$self->_error (&Errno::EPROTO, 1,	1640	$self->_error (Errno::EPROTO, 1, $err);
1392	Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ()));	1641	}
1393	}	1642	}
1394		1643
1395	# poll the write BIO and send the data if applicable	1644	# poll the write BIO and send the data if applicable
1396	# also decode read data if possible	1645	# also decode read data if possible
1397	# this is basiclaly our TLS state machine	1646	# this is basiclaly our TLS state machine
…		…
1408	}	1657	}
1409		1658
1410	$tmp = Net::SSLeay::get_error ($self->{tls}, $tmp);	1659	$tmp = Net::SSLeay::get_error ($self->{tls}, $tmp);
1411	return $self->_tls_error ($tmp)	1660	return $self->_tls_error ($tmp)
1412	if $tmp != $ERROR_WANT_READ	1661	if $tmp != $ERROR_WANT_READ
1413	&& ($tmp != $ERROR_SYSCALL \|\| $!)	1662	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1414	&& $tmp != $ERROR_ZERO_RETURN;
1415	}	1663	}
1416		1664
1417	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {	1665	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {
1418	unless (length $tmp) {	1666	unless (length $tmp) {
1419	# let's treat SSL-eof as we treat normal EOF	1667	$self->{_on_starttls}
1420	delete $self->{_rw};	1668	and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ???
1421	$self->{_eof} = 1;
1422	&_freetls;	1669	&_freetls;
		1670
		1671	if ($self->{on_stoptls}) {
		1672	$self->{on_stoptls}($self);
		1673	return;
		1674	} else {
		1675	# let's treat SSL-eof as we treat normal EOF
		1676	delete $self->{_rw};
		1677	$self->{_eof} = 1;
		1678	}
1423	}	1679	}
1424		1680
1425	$self->{_tls_rbuf} .= $tmp;	1681	$self->{_tls_rbuf} .= $tmp;
1426	$self->_drain_rbuf unless $self->{_in_drain};	1682	$self->_drain_rbuf;
1427	$self->{tls} or return; # tls session might have gone away in callback	1683	$self->{tls} or return; # tls session might have gone away in callback
1428	}	1684	}
1429		1685
1430	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);	1686	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);
1431	return $self->_tls_error ($tmp)	1687	return $self->_tls_error ($tmp)
1432	if $tmp != $ERROR_WANT_READ	1688	if $tmp != $ERROR_WANT_READ
1433	&& ($tmp != $ERROR_SYSCALL \|\| $!)	1689	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1434	&& $tmp != $ERROR_ZERO_RETURN;
1435		1690
1436	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {	1691	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {
1437	$self->{wbuf} .= $tmp;	1692	$self->{wbuf} .= $tmp;
1438	$self->_drain_wbuf;	1693	$self->_drain_wbuf;
1439	}	1694	}
		1695
		1696	$self->{_on_starttls}
		1697	and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK ()
		1698	and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established");
1440	}	1699	}
1441		1700
1442	=item $handle->starttls ($tls[, $tls_ctx])	1701	=item $handle->starttls ($tls[, $tls_ctx])
1443		1702
1444	Instead of starting TLS negotiation immediately when the AnyEvent::Handle	1703	Instead of starting TLS negotiation immediately when the AnyEvent::Handle
1445	object is created, you can also do that at a later time by calling	1704	object is created, you can also do that at a later time by calling
1446	C<starttls>.	1705	C<starttls>.
		1706
		1707	Starting TLS is currently an asynchronous operation - when you push some
		1708	write data and then call C<< ->starttls >> then TLS negotiation will start
		1709	immediately, after which the queued write data is then sent.
1447		1710
1448	The first argument is the same as the C<tls> constructor argument (either	1711	The first argument is the same as the C<tls> constructor argument (either
1449	C<"connect">, C<"accept"> or an existing Net::SSLeay object).	1712	C<"connect">, C<"accept"> or an existing Net::SSLeay object).
1450		1713
1451	The second argument is the optional C<AnyEvent::TLS> object that is used	1714	The second argument is the optional C<AnyEvent::TLS> object that is used
…		…
1456	The TLS connection object will end up in C<< $handle->{tls} >>, the TLS	1719	The TLS connection object will end up in C<< $handle->{tls} >>, the TLS
1457	context in C<< $handle->{tls_ctx} >> after this call and can be used or	1720	context in C<< $handle->{tls_ctx} >> after this call and can be used or
1458	changed to your liking. Note that the handshake might have already started	1721	changed to your liking. Note that the handshake might have already started
1459	when this function returns.	1722	when this function returns.
1460		1723
1461	If it an error to start a TLS handshake more than once per	1724	Due to bugs in OpenSSL, it might or might not be possible to do multiple
1462	AnyEvent::Handle object (this is due to bugs in OpenSSL).	1725	handshakes on the same stream. Best do not attempt to use the stream after
		1726	stopping TLS.
1463		1727
1464	=cut	1728	=cut
		1729
		1730	our %TLS_CACHE; #TODO not yet documented, should we?
1465		1731
1466	sub starttls {	1732	sub starttls {
1467	my ($self, $ssl, $ctx) = @_;	1733	my ($self, $tls, $ctx) = @_;
		1734
		1735	Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught"
		1736	if $self->{tls};
		1737
		1738	$self->{tls} = $tls;
		1739	$self->{tls_ctx} = $ctx if @_ > 2;
		1740
		1741	return unless $self->{fh};
1468		1742
1469	require Net::SSLeay;	1743	require Net::SSLeay;
1470		1744
1471	Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object"
1472	if $self->{tls};
1473
1474	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();	1745	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();
1475	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();	1746	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();
1476	$ERROR_ZERO_RETURN = Net::SSLeay::ERROR_ZERO_RETURN ();
1477		1747
		1748	$tls = $self->{tls};
1478	$ctx \|\|= $self->{tls_ctx};	1749	$ctx = $self->{tls_ctx};
		1750
		1751	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session
1479		1752
1480	if ("HASH" eq ref $ctx) {	1753	if ("HASH" eq ref $ctx) {
1481	require AnyEvent::TLS;	1754	require AnyEvent::TLS;
1482		1755
1483	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context	1756	if ($ctx->{cache}) {
		1757	my $key = $ctx+0;
		1758	$ctx = $TLS_CACHE{$key} \|\|= new AnyEvent::TLS %$ctx;
		1759	} else {
1484	$ctx = new AnyEvent::TLS %$ctx;	1760	$ctx = new AnyEvent::TLS %$ctx;
		1761	}
1485	}	1762	}
1486		1763
1487	$self->{tls_ctx} = $ctx \|\| TLS_CTX ();	1764	$self->{tls_ctx} = $ctx \|\| TLS_CTX ();
1488	$self->{tls} = $ssl = $self->{tls_ctx}->_get_session ($ssl, $self, $self->{peername});	1765	$self->{tls} = $tls = $self->{tls_ctx}->_get_session ($tls, $self, $self->{peername});
1489		1766
1490	# basically, this is deep magic (because SSL_read should have the same issues)	1767	# basically, this is deep magic (because SSL_read should have the same issues)
1491	# but the openssl maintainers basically said: "trust us, it just works".	1768	# but the openssl maintainers basically said: "trust us, it just works".
1492	# (unfortunately, we have to hardcode constants because the abysmally misdesigned	1769	# (unfortunately, we have to hardcode constants because the abysmally misdesigned
1493	# and mismaintained ssleay-module doesn't even offer them).	1770	# and mismaintained ssleay-module doesn't even offer them).
…		…
1500	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to	1777	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to
1501	# have identity issues in that area.	1778	# have identity issues in that area.
1502	# Net::SSLeay::CTX_set_mode ($ssl,	1779	# Net::SSLeay::CTX_set_mode ($ssl,
1503	# (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)	1780	# (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)
1504	# \| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));	1781	# \| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));
1505	Net::SSLeay::CTX_set_mode ($ssl, 1\|2);	1782	Net::SSLeay::CTX_set_mode ($tls, 1\|2);
1506		1783
1507	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1784	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1508	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1785	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1509		1786
		1787	Net::SSLeay::BIO_write ($self->{_rbio}, delete $self->{rbuf});
		1788
1510	Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});	1789	Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio});
		1790
		1791	$self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) }
		1792	if $self->{on_starttls};
1511		1793
1512	&_dotls; # need to trigger the initial handshake	1794	&_dotls; # need to trigger the initial handshake
1513	$self->start_read; # make sure we actually do read	1795	$self->start_read; # make sure we actually do read
1514	}	1796	}
1515		1797
1516	=item $handle->stoptls	1798	=item $handle->stoptls
1517		1799
1518	Shuts down the SSL connection - this makes a proper EOF handshake by	1800	Shuts down the SSL connection - this makes a proper EOF handshake by
1519	sending a close notify to the other side, but since OpenSSL doesn't	1801	sending a close notify to the other side, but since OpenSSL doesn't
1520	support non-blocking shut downs, it is not possible to re-use the stream	1802	support non-blocking shut downs, it is not guarenteed that you can re-use
1521	afterwards.	1803	the stream afterwards.
1522		1804
1523	=cut	1805	=cut
1524		1806
1525	sub stoptls {	1807	sub stoptls {
1526	my ($self) = @_;	1808	my ($self) = @_;
…		…
1528	if ($self->{tls}) {	1810	if ($self->{tls}) {
1529	Net::SSLeay::shutdown ($self->{tls});	1811	Net::SSLeay::shutdown ($self->{tls});
1530		1812
1531	&_dotls;	1813	&_dotls;
1532		1814
1533	# we don't give a shit. no, we do, but we can't. no...	1815	# # we don't give a shit. no, we do, but we can't. no...#d#
1534	# we, we... have to use openssl :/	1816	# # we, we... have to use openssl :/#d#
1535	&_freetls;	1817	# &_freetls;#d#
1536	}	1818	}
1537	}	1819	}
1538		1820
1539	sub _freetls {	1821	sub _freetls {
1540	my ($self) = @_;	1822	my ($self) = @_;
1541		1823
1542	return unless $self->{tls};	1824	return unless $self->{tls};
1543		1825
1544	$self->{tls_ctx}->_put_session (delete $self->{tls});	1826	$self->{tls_ctx}->_put_session (delete $self->{tls})
		1827	if $self->{tls} > 0;
1545		1828
1546	delete @$self{qw(_rbio _wbio _tls_wbuf)};	1829	delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)};
1547	}	1830	}
1548		1831
1549	sub DESTROY {	1832	sub DESTROY {
1550	my ($self) = @_;	1833	my ($self) = @_;
1551		1834
1552	&_freetls;	1835	&_freetls;
1553		1836
1554	my $linger = exists $self->{linger} ? $self->{linger} : 3600;	1837	my $linger = exists $self->{linger} ? $self->{linger} : 3600;
1555		1838
1556	if ($linger && length $self->{wbuf}) {	1839	if ($linger && length $self->{wbuf} && $self->{fh}) {
1557	my $fh = delete $self->{fh};	1840	my $fh = delete $self->{fh};
1558	my $wbuf = delete $self->{wbuf};	1841	my $wbuf = delete $self->{wbuf};
1559		1842
1560	my @linger;	1843	my @linger;
1561		1844
1562	push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub {	1845	push @linger, AE::io $fh, 1, sub {
1563	my $len = syswrite $fh, $wbuf, length $wbuf;	1846	my $len = syswrite $fh, $wbuf, length $wbuf;
1564		1847
1565	if ($len > 0) {	1848	if ($len > 0) {
1566	substr $wbuf, 0, $len, "";	1849	substr $wbuf, 0, $len, "";
1567	} else {	1850	} else {
1568	@linger = (); # end	1851	@linger = (); # end
1569	}	1852	}
1570	});	1853	};
1571	push @linger, AnyEvent->timer (after => $linger, cb => sub {	1854	push @linger, AE::timer $linger, 0, sub {
1572	@linger = ();	1855	@linger = ();
1573	});	1856	};
1574	}	1857	}
1575	}	1858	}
1576		1859
1577	=item $handle->destroy	1860	=item $handle->destroy
1578		1861
1579	Shuts down the handle object as much as possible - this call ensures that	1862	Shuts down the handle object as much as possible - this call ensures that
1580	no further callbacks will be invoked and resources will be freed as much	1863	no further callbacks will be invoked and as many resources as possible
1581	as possible. You must not call any methods on the object afterwards.	1864	will be freed. Any method you will call on the handle object after
		1865	destroying it in this way will be silently ignored (and it will return the
		1866	empty list).
1582		1867
1583	Normally, you can just "forget" any references to an AnyEvent::Handle	1868	Normally, you can just "forget" any references to an AnyEvent::Handle
1584	object and it will simply shut down. This works in fatal error and EOF	1869	object and it will simply shut down. This works in fatal error and EOF
1585	callbacks, as well as code outside. It does I<NOT> work in a read or write	1870	callbacks, as well as code outside. It does I<NOT> work in a read or write
1586	callback, so when you want to destroy the AnyEvent::Handle object from	1871	callback, so when you want to destroy the AnyEvent::Handle object from
1587	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in	1872	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in
1588	that case.	1873	that case.
1589		1874
		1875	Destroying the handle object in this way has the advantage that callbacks
		1876	will be removed as well, so if those are the only reference holders (as
		1877	is common), then one doesn't need to do anything special to break any
		1878	reference cycles.
		1879
1590	The handle might still linger in the background and write out remaining	1880	The handle might still linger in the background and write out remaining
1591	data, as specified by the C<linger> option, however.	1881	data, as specified by the C<linger> option, however.
1592		1882
1593	=cut	1883	=cut
1594		1884
1595	sub destroy {	1885	sub destroy {
1596	my ($self) = @_;	1886	my ($self) = @_;
1597		1887
1598	$self->DESTROY;	1888	$self->DESTROY;
1599	%$self = ();	1889	%$self = ();
		1890	bless $self, "AnyEvent::Handle::destroyed";
		1891	}
		1892
		1893	sub AnyEvent::Handle::destroyed::AUTOLOAD {
		1894	#nop
1600	}	1895	}
1601		1896
1602	=item AnyEvent::Handle::TLS_CTX	1897	=item AnyEvent::Handle::TLS_CTX
1603		1898
1604	This function creates and returns the AnyEvent::TLS object used by default	1899	This function creates and returns the AnyEvent::TLS object used by default
…		…
1661		1956
1662	$handle->on_read (sub { });	1957	$handle->on_read (sub { });
1663	$handle->on_eof (undef);	1958	$handle->on_eof (undef);
1664	$handle->on_error (sub {	1959	$handle->on_error (sub {
1665	my $data = delete $_[0]{rbuf};	1960	my $data = delete $_[0]{rbuf};
1666	undef $handle;
1667	});	1961	});
1668		1962
1669	The reason to use C<on_error> is that TCP connections, due to latencies	1963	The reason to use C<on_error> is that TCP connections, due to latencies
1670	and packets loss, might get closed quite violently with an error, when in	1964	and packets loss, might get closed quite violently with an error, when in
1671	fact, all data has been received.	1965	fact, all data has been received.
…		…
1687	$handle->on_drain (sub {	1981	$handle->on_drain (sub {
1688	warn "all data submitted to the kernel\n";	1982	warn "all data submitted to the kernel\n";
1689	undef $handle;	1983	undef $handle;
1690	});	1984	});
1691		1985
		1986	If you just want to queue some data and then signal EOF to the other side,
		1987	consider using C<< ->push_shutdown >> instead.
		1988
		1989	=item I want to contact a TLS/SSL server, I don't care about security.
		1990
		1991	If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS,
		1992	simply connect to it and then create the AnyEvent::Handle with the C<tls>
		1993	parameter:
		1994
		1995	tcp_connect $host, $port, sub {
		1996	my ($fh) = @_;
		1997
		1998	my $handle = new AnyEvent::Handle
		1999	fh => $fh,
		2000	tls => "connect",
		2001	on_error => sub { ... };
		2002
		2003	$handle->push_write (...);
		2004	};
		2005
		2006	=item I want to contact a TLS/SSL server, I do care about security.
		2007
		2008	Then you should additionally enable certificate verification, including
		2009	peername verification, if the protocol you use supports it (see
		2010	L<AnyEvent::TLS>, C<verify_peername>).
		2011
		2012	E.g. for HTTPS:
		2013
		2014	tcp_connect $host, $port, sub {
		2015	my ($fh) = @_;
		2016
		2017	my $handle = new AnyEvent::Handle
		2018	fh => $fh,
		2019	peername => $host,
		2020	tls => "connect",
		2021	tls_ctx => { verify => 1, verify_peername => "https" },
		2022	...
		2023
		2024	Note that you must specify the hostname you connected to (or whatever
		2025	"peername" the protocol needs) as the C<peername> argument, otherwise no
		2026	peername verification will be done.
		2027
		2028	The above will use the system-dependent default set of trusted CA
		2029	certificates. If you want to check against a specific CA, add the
		2030	C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>:
		2031
		2032	tls_ctx => {
		2033	verify => 1,
		2034	verify_peername => "https",
		2035	ca_file => "my-ca-cert.pem",
		2036	},
		2037
		2038	=item I want to create a TLS/SSL server, how do I do that?
		2039
		2040	Well, you first need to get a server certificate and key. You have
		2041	three options: a) ask a CA (buy one, use cacert.org etc.) b) create a
		2042	self-signed certificate (cheap. check the search engine of your choice,
		2043	there are many tutorials on the net) or c) make your own CA (tinyca2 is a
		2044	nice program for that purpose).
		2045
		2046	Then create a file with your private key (in PEM format, see
		2047	L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The
		2048	file should then look like this:
		2049
		2050	-----BEGIN RSA PRIVATE KEY-----
		2051	...header data
		2052	... lots of base64'y-stuff
		2053	-----END RSA PRIVATE KEY-----
		2054
		2055	-----BEGIN CERTIFICATE-----
		2056	... lots of base64'y-stuff
		2057	-----END CERTIFICATE-----
		2058
		2059	The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then
		2060	specify this file as C<cert_file>:
		2061
		2062	tcp_server undef, $port, sub {
		2063	my ($fh) = @_;
		2064
		2065	my $handle = new AnyEvent::Handle
		2066	fh => $fh,
		2067	tls => "accept",
		2068	tls_ctx => { cert_file => "my-server-keycert.pem" },
		2069	...
		2070
		2071	When you have intermediate CA certificates that your clients might not
		2072	know about, just append them to the C<cert_file>.
		2073
1692	=back	2074	=back
1693		2075
1694		2076
1695	=head1 SUBCLASSING AnyEvent::Handle	2077	=head1 SUBCLASSING AnyEvent::Handle
1696		2078

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.134 by root, Fri Jul 3 00:09:04 2009 UTC vs. Revision 1.177 by root, Sun Aug 9 00:24:35 2009 UTC

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.134 by root, Fri Jul 3 00:09:04 2009 UTC vs.
Revision 1.177 by root, Sun Aug 9 00:24:35 2009 UTC