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

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.17 by root, Sat May 24 04:17:45 2008 UTC vs.
Revision 1.61 by root, Fri Jun 6 10:23:50 2008 UTC

…		…
2		2
3	no warnings;	3	no warnings;
4	use strict;	4	use strict;
5		5
6	use AnyEvent ();	6	use AnyEvent ();
7	use AnyEvent::Util ();	7	use AnyEvent::Util qw(WSAEWOULDBLOCK);
8	use Scalar::Util ();	8	use Scalar::Util ();
9	use Carp ();	9	use Carp ();
10	use Fcntl ();	10	use Fcntl ();
11	use Errno qw/EAGAIN EINTR/;	11	use Errno qw(EAGAIN EINTR);
12		12
13	=head1 NAME	13	=head1 NAME
14		14
15	AnyEvent::Handle - non-blocking I/O on filehandles via AnyEvent	15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16		16
17	This module is experimental.
18
19	=cut	17	=cut
20		18
21	our $VERSION = '0.04';	19	our $VERSION = 4.14;
22		20
23	=head1 SYNOPSIS	21	=head1 SYNOPSIS
24		22
25	use AnyEvent;	23	use AnyEvent;
26	use AnyEvent::Handle;	24	use AnyEvent::Handle;
27		25
28	my $cv = AnyEvent->condvar;	26	my $cv = AnyEvent->condvar;
29		27
30	my $ae_fh = AnyEvent::Handle->new (fh => \*STDIN);	28	my $handle =
31
32	#TODO
33
34	# or use the constructor to pass the callback:
35
36	my $ae_fh2 =
37	AnyEvent::Handle->new (	29	AnyEvent::Handle->new (
38	fh => \*STDIN,	30	fh => \*STDIN,
39	on_eof => sub {	31	on_eof => sub {
40	$cv->broadcast;	32	$cv->broadcast;
41	},	33	},
42	#TODO
43	);	34	);
44		35
45	$cv->wait;	36	# send some request line
		37	$handle->push_write ("getinfo\015\012");
		38
		39	# read the response line
		40	$handle->push_read (line => sub {
		41	my ($handle, $line) = @_;
		42	warn "read line <$line>\n";
		43	$cv->send;
		44	});
		45
		46	$cv->recv;
46		47
47	=head1 DESCRIPTION	48	=head1 DESCRIPTION
48		49
49	This module is a helper module to make it easier to do event-based I/O on	50	This module is a helper module to make it easier to do event-based I/O on
50	filehandles. For utility functions for doing non-blocking connects and accepts	51	filehandles. For utility functions for doing non-blocking connects and accepts
…		…
72	The filehandle this L<AnyEvent::Handle> object will operate on.	73	The filehandle this L<AnyEvent::Handle> object will operate on.
73		74
74	NOTE: The filehandle will be set to non-blocking (using	75	NOTE: The filehandle will be set to non-blocking (using
75	AnyEvent::Util::fh_nonblocking).	76	AnyEvent::Util::fh_nonblocking).
76		77
77	=item on_eof => $cb->($self)	78	=item on_eof => $cb->($handle)
78		79
79	Set the callback to be called on EOF.	80	Set the callback to be called when an end-of-file condition is detcted,
		81	i.e. in the case of a socket, when the other side has closed the
		82	connection cleanly.
80		83
81	While not mandatory, it is highly recommended to set an eof callback,	84	While not mandatory, it is highly recommended to set an eof callback,
82	otherwise you might end up with a closed socket while you are still	85	otherwise you might end up with a closed socket while you are still
83	waiting for data.	86	waiting for data.
84		87
85	=item on_error => $cb->($self)	88	=item on_error => $cb->($handle, $fatal)
86		89
87	This is the fatal error callback, that is called when, well, a fatal error	90	This is the error callback, which is called when, well, some error
88	ocurs, such as not being able to resolve the hostname, failure to connect	91	occured, such as not being able to resolve the hostname, failure to
89	or a read error.	92	connect or a read error.
90		93
91	The object will not be in a usable state when this callback has been	94	Some errors are fatal (which is indicated by C<$fatal> being true). On
92	called.	95	fatal errors the handle object will be shut down and will not be
		96	usable. Non-fatal errors can be retried by simply returning, but it is
		97	recommended to simply ignore this parameter and instead abondon the handle
		98	object when this callback is invoked.
93		99
94	On callback entrance, the value of C<$!> contains the operating system	100	On callback entrance, the value of C<$!> contains the operating system
95	error (or C<ENOSPC> or C<EPIPE>).	101	error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>).
96		102
97	While not mandatory, it is I<highly> recommended to set this callback, as	103	While not mandatory, it is I<highly> recommended to set this callback, as
98	you will not be notified of errors otherwise. The default simply calls	104	you will not be notified of errors otherwise. The default simply calls
99	die.	105	C<croak>.
100		106
101	=item on_read => $cb->($self)	107	=item on_read => $cb->($handle)
102		108
103	This sets the default read callback, which is called when data arrives	109	This sets the default read callback, which is called when data arrives
104	and no read request is in the queue.	110	and no read request is in the queue (unlike read queue callbacks, this
		111	callback will only be called when at least one octet of data is in the
		112	read buffer).
105		113
106	To access (and remove data from) the read buffer, use the C<< ->rbuf >>	114	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
107	method or acces sthe C<$self->{rbuf}> member directly.	115	method or access the C<$handle->{rbuf}> member directly.
108		116
109	When an EOF condition is detected then AnyEvent::Handle will first try to	117	When an EOF condition is detected then AnyEvent::Handle will first try to
110	feed all the remaining data to the queued callbacks and C<on_read> before	118	feed all the remaining data to the queued callbacks and C<on_read> before
111	calling the C<on_eof> callback. If no progress can be made, then a fatal	119	calling the C<on_eof> callback. If no progress can be made, then a fatal
112	error will be raised (with C<$!> set to C<EPIPE>).	120	error will be raised (with C<$!> set to C<EPIPE>).
113		121
114	=item on_drain => $cb->()	122	=item on_drain => $cb->($handle)
115		123
116	This sets the callback that is called when the write buffer becomes empty	124	This sets the callback that is called when the write buffer becomes empty
117	(or when the callback is set and the buffer is empty already).	125	(or when the callback is set and the buffer is empty already).
118		126
119	To append to the write buffer, use the C<< ->push_write >> method.	127	To append to the write buffer, use the C<< ->push_write >> method.
		128
		129	=item timeout => $fractional_seconds
		130
		131	If non-zero, then this enables an "inactivity" timeout: whenever this many
		132	seconds pass without a successful read or write on the underlying file
		133	handle, the C<on_timeout> callback will be invoked (and if that one is
		134	missing, an C<ETIMEDOUT> error will be raised).
		135
		136	Note that timeout processing is also active when you currently do not have
		137	any outstanding read or write requests: If you plan to keep the connection
		138	idle then you should disable the timout temporarily or ignore the timeout
		139	in the C<on_timeout> callback.
		140
		141	Zero (the default) disables this timeout.
		142
		143	=item on_timeout => $cb->($handle)
		144
		145	Called whenever the inactivity timeout passes. If you return from this
		146	callback, then the timeout will be reset as if some activity had happened,
		147	so this condition is not fatal in any way.
120		148
121	=item rbuf_max => <bytes>	149	=item rbuf_max => <bytes>
122		150
123	If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>)	151	If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>)
124	when the read buffer ever (strictly) exceeds this size. This is useful to	152	when the read buffer ever (strictly) exceeds this size. This is useful to
…		…
131	isn't finished).	159	isn't finished).
132		160
133	=item read_size => <bytes>	161	=item read_size => <bytes>
134		162
135	The default read block size (the amount of bytes this module will try to read	163	The default read block size (the amount of bytes this module will try to read
136	on each [loop iteration). Default: C<4096>.	164	during each (loop iteration). Default: C<8192>.
137		165
138	=item low_water_mark => <bytes>	166	=item low_water_mark => <bytes>
139		167
140	Sets the amount of bytes (default: C<0>) that make up an "empty" write	168	Sets the amount of bytes (default: C<0>) that make up an "empty" write
141	buffer: If the write reaches this size or gets even samller it is	169	buffer: If the write reaches this size or gets even samller it is
142	considered empty.	170	considered empty.
143		171
		172	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
		173
		174	When this parameter is given, it enables TLS (SSL) mode, that means it
		175	will start making tls handshake and will transparently encrypt/decrypt
		176	data.
		177
		178	TLS mode requires Net::SSLeay to be installed (it will be loaded
		179	automatically when you try to create a TLS handle).
		180
		181	For the TLS server side, use C<accept>, and for the TLS client side of a
		182	connection, use C<connect> mode.
		183
		184	You can also provide your own TLS connection object, but you have
		185	to make sure that you call either C<Net::SSLeay::set_connect_state>
		186	or C<Net::SSLeay::set_accept_state> on it before you pass it to
		187	AnyEvent::Handle.
		188
		189	See the C<starttls> method if you need to start TLs negotiation later.
		190
		191	=item tls_ctx => $ssl_ctx
		192
		193	Use the given Net::SSLeay::CTX object to create the new TLS connection
		194	(unless a connection object was specified directly). If this parameter is
		195	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.
		196
		197	=item json => JSON or JSON::XS object
		198
		199	This is the json coder object used by the C<json> read and write types.
		200
		201	If you don't supply it, then AnyEvent::Handle will create and use a
		202	suitable one, which will write and expect UTF-8 encoded JSON texts.
		203
		204	Note that you are responsible to depend on the JSON module if you want to
		205	use this functionality, as AnyEvent does not have a dependency itself.
		206
		207	=item filter_r => $cb
		208
		209	=item filter_w => $cb
		210
		211	These exist, but are undocumented at this time.
		212
144	=back	213	=back
145		214
146	=cut	215	=cut
147		216
148	sub new {	217	sub new {
…		…
152		221
153	$self->{fh} or Carp::croak "mandatory argument fh is missing";	222	$self->{fh} or Carp::croak "mandatory argument fh is missing";
154		223
155	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;	224	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;
156		225
157	$self->on_eof (delete $self->{on_eof} ) if $self->{on_eof};	226	if ($self->{tls}) {
158	$self->on_error (delete $self->{on_error}) if $self->{on_error};	227	require Net::SSLeay;
		228	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx});
		229	}
		230
		231	$self->{_activity} = AnyEvent->now;
		232	$self->_timeout;
		233
159	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};	234	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};
160	$self->on_read (delete $self->{on_read} ) if $self->{on_read};
161
162	$self->start_read;
163		235
164	$self	236	$self
165	}	237	}
166		238
167	sub _shutdown {	239	sub _shutdown {
168	my ($self) = @_;	240	my ($self) = @_;
169		241
		242	delete $self->{_tw};
170	delete $self->{rw};	243	delete $self->{_rw};
171	delete $self->{ww};	244	delete $self->{_ww};
172	delete $self->{fh};	245	delete $self->{fh};
173	}
174		246
		247	$self->stoptls;
		248	}
		249
175	sub error {	250	sub _error {
176	my ($self) = @_;	251	my ($self, $errno, $fatal) = @_;
177		252
178	{
179	local $!;
180	$self->_shutdown;	253	$self->_shutdown
181	}	254	if $fatal;
		255
		256	$! = $errno;
182		257
183	if ($self->{on_error}) {	258	if ($self->{on_error}) {
184	$self->{on_error}($self);	259	$self->{on_error}($self, $fatal);
185	} else {	260	} else {
186	die "AnyEvent::Handle uncaught fatal error: $!";	261	Carp::croak "AnyEvent::Handle uncaught error: $!";
187	}	262	}
188	}	263	}
189		264
190	=item $fh = $handle->fh	265	=item $fh = $handle->fh
191		266
192	This method returns the filehandle of the L<AnyEvent::Handle> object.	267	This method returns the file handle of the L<AnyEvent::Handle> object.
193		268
194	=cut	269	=cut
195		270
196	sub fh { $_[0]->{fh} }	271	sub fh { $_[0]{fh} }
197		272
198	=item $handle->on_error ($cb)	273	=item $handle->on_error ($cb)
199		274
200	Replace the current C<on_error> callback (see the C<on_error> constructor argument).	275	Replace the current C<on_error> callback (see the C<on_error> constructor argument).
201		276
…		…
213		288
214	sub on_eof {	289	sub on_eof {
215	$_[0]{on_eof} = $_[1];	290	$_[0]{on_eof} = $_[1];
216	}	291	}
217		292
		293	=item $handle->on_timeout ($cb)
		294
		295	Replace the current C<on_timeout> callback, or disables the callback
		296	(but not the timeout) if C<$cb> = C<undef>. See C<timeout> constructor
		297	argument.
		298
		299	=cut
		300
		301	sub on_timeout {
		302	$_[0]{on_timeout} = $_[1];
		303	}
		304
		305	#############################################################################
		306
		307	=item $handle->timeout ($seconds)
		308
		309	Configures (or disables) the inactivity timeout.
		310
		311	=cut
		312
		313	sub timeout {
		314	my ($self, $timeout) = @_;
		315
		316	$self->{timeout} = $timeout;
		317	$self->_timeout;
		318	}
		319
		320	# reset the timeout watcher, as neccessary
		321	# also check for time-outs
		322	sub _timeout {
		323	my ($self) = @_;
		324
		325	if ($self->{timeout}) {
		326	my $NOW = AnyEvent->now;
		327
		328	# when would the timeout trigger?
		329	my $after = $self->{_activity} + $self->{timeout} - $NOW;
		330
		331	# now or in the past already?
		332	if ($after <= 0) {
		333	$self->{_activity} = $NOW;
		334
		335	if ($self->{on_timeout}) {
		336	$self->{on_timeout}($self);
		337	} else {
		338	$self->_error (&Errno::ETIMEDOUT);
		339	}
		340
		341	# callback could have changed timeout value, optimise
		342	return unless $self->{timeout};
		343
		344	# calculate new after
		345	$after = $self->{timeout};
		346	}
		347
		348	Scalar::Util::weaken $self;
		349	return unless $self; # ->error could have destroyed $self
		350
		351	$self->{_tw} \|\|= AnyEvent->timer (after => $after, cb => sub {
		352	delete $self->{_tw};
		353	$self->_timeout;
		354	});
		355	} else {
		356	delete $self->{_tw};
		357	}
		358	}
		359
218	#############################################################################	360	#############################################################################
219		361
220	=back	362	=back
221		363
222	=head2 WRITE QUEUE	364	=head2 WRITE QUEUE
…		…
225	for reading.	367	for reading.
226		368
227	The write queue is very simple: you can add data to its end, and	369	The write queue is very simple: you can add data to its end, and
228	AnyEvent::Handle will automatically try to get rid of it for you.	370	AnyEvent::Handle will automatically try to get rid of it for you.
229		371
230	When data could be writtena nd the write buffer is shorter then the low	372	When data could be written and the write buffer is shorter then the low
231	water mark, the C<on_drain> callback will be invoked.	373	water mark, the C<on_drain> callback will be invoked.
232		374
233	=over 4	375	=over 4
234		376
235	=item $handle->on_drain ($cb)	377	=item $handle->on_drain ($cb)
…		…
257	=cut	399	=cut
258		400
259	sub _drain_wbuf {	401	sub _drain_wbuf {
260	my ($self) = @_;	402	my ($self) = @_;
261		403
262	unless ($self->{ww}) {	404	if (!$self->{_ww} && length $self->{wbuf}) {
		405
263	Scalar::Util::weaken $self;	406	Scalar::Util::weaken $self;
		407
264	my $cb = sub {	408	my $cb = sub {
265	my $len = syswrite $self->{fh}, $self->{wbuf};	409	my $len = syswrite $self->{fh}, $self->{wbuf};
266		410
267	if ($len > 0) {	411	if ($len >= 0) {
268	substr $self->{wbuf}, 0, $len, "";	412	substr $self->{wbuf}, 0, $len, "";
		413
		414	$self->{_activity} = AnyEvent->now;
269		415
270	$self->{on_drain}($self)	416	$self->{on_drain}($self)
271	if $self->{low_water_mark} >= length $self->{wbuf}	417	if $self->{low_water_mark} >= length $self->{wbuf}
272	&& $self->{on_drain};	418	&& $self->{on_drain};
273		419
274	delete $self->{ww} unless length $self->{wbuf};	420	delete $self->{_ww} unless length $self->{wbuf};
275	} elsif ($! != EAGAIN && $! != EINTR) {	421	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
276	$self->error;	422	$self->_error ($!, 1);
277	}	423	}
278	};	424	};
279		425
		426	# try to write data immediately
		427	$cb->();
		428
		429	# if still data left in wbuf, we need to poll
280	$self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb);	430	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)
281		431	if length $self->{wbuf};
282	$cb->($self);
283	};	432	};
		433	}
		434
		435	our %WH;
		436
		437	sub register_write_type($$) {
		438	$WH{$_[0]} = $_[1];
284	}	439	}
285		440
286	sub push_write {	441	sub push_write {
287	my $self = shift;	442	my $self = shift;
288		443
		444	if (@_ > 1) {
		445	my $type = shift;
		446
		447	@_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write")
		448	->($self, @_);
		449	}
		450
289	if ($self->{filter_w}) {	451	if ($self->{filter_w}) {
290	$self->{filter_w}->(\$_[0]);	452	$self->{filter_w}($self, \$_[0]);
291	} else {	453	} else {
292	$self->{wbuf} .= $_[0];	454	$self->{wbuf} .= $_[0];
293	$self->_drain_wbuf;	455	$self->_drain_wbuf;
294	}	456	}
295	}	457	}
		458
		459	=item $handle->push_write (type => @args)
		460
		461	Instead of formatting your data yourself, you can also let this module do
		462	the job by specifying a type and type-specific arguments.
		463
		464	Predefined types are (if you have ideas for additional types, feel free to
		465	drop by and tell us):
		466
		467	=over 4
		468
		469	=item netstring => $string
		470
		471	Formats the given value as netstring
		472	(http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them).
		473
		474	=cut
		475
		476	register_write_type netstring => sub {
		477	my ($self, $string) = @_;
		478
		479	sprintf "%d:%s,", (length $string), $string
		480	};
		481
		482	=item packstring => $format, $data
		483
		484	An octet string prefixed with an encoded length. The encoding C<$format>
		485	uses the same format as a Perl C<pack> format, but must specify a single
		486	integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an
		487	optional C<!>, C<< < >> or C<< > >> modifier).
		488
		489	=cut
		490
		491	register_write_type packstring => sub {
		492	my ($self, $format, $string) = @_;
		493
		494	pack "$format/a", $string
		495	};
		496
		497	=item json => $array_or_hashref
		498
		499	Encodes the given hash or array reference into a JSON object. Unless you
		500	provide your own JSON object, this means it will be encoded to JSON text
		501	in UTF-8.
		502
		503	JSON objects (and arrays) are self-delimiting, so you can write JSON at
		504	one end of a handle and read them at the other end without using any
		505	additional framing.
		506
		507	The generated JSON text is guaranteed not to contain any newlines: While
		508	this module doesn't need delimiters after or between JSON texts to be
		509	able to read them, many other languages depend on that.
		510
		511	A simple RPC protocol that interoperates easily with others is to send
		512	JSON arrays (or objects, although arrays are usually the better choice as
		513	they mimic how function argument passing works) and a newline after each
		514	JSON text:
		515
		516	$handle->push_write (json => ["method", "arg1", "arg2"]); # whatever
		517	$handle->push_write ("\012");
		518
		519	An AnyEvent::Handle receiver would simply use the C<json> read type and
		520	rely on the fact that the newline will be skipped as leading whitespace:
		521
		522	$handle->push_read (json => sub { my $array = $_[1]; ... });
		523
		524	Other languages could read single lines terminated by a newline and pass
		525	this line into their JSON decoder of choice.
		526
		527	=cut
		528
		529	register_write_type json => sub {
		530	my ($self, $ref) = @_;
		531
		532	require JSON;
		533
		534	$self->{json} ? $self->{json}->encode ($ref)
		535	: JSON::encode_json ($ref)
		536	};
		537
		538	=back
		539
		540	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
		541
		542	This function (not method) lets you add your own types to C<push_write>.
		543	Whenever the given C<type> is used, C<push_write> will invoke the code
		544	reference with the handle object and the remaining arguments.
		545
		546	The code reference is supposed to return a single octet string that will
		547	be appended to the write buffer.
		548
		549	Note that this is a function, and all types registered this way will be
		550	global, so try to use unique names.
		551
		552	=cut
296		553
297	#############################################################################	554	#############################################################################
298		555
299	=back	556	=back
300		557
…		…
312	enough is there) from the read buffer (C<< $handle->rbuf >>) if you want	569	enough is there) from the read buffer (C<< $handle->rbuf >>) if you want
313	or not.	570	or not.
314		571
315	In the more complex case, you want to queue multiple callbacks. In this	572	In the more complex case, you want to queue multiple callbacks. In this
316	case, AnyEvent::Handle will call the first queued callback each time new	573	case, AnyEvent::Handle will call the first queued callback each time new
317	data arrives and removes it when it has done its job (see C<push_read>,	574	data arrives (also the first time it is queued) and removes it when it has
318	below).	575	done its job (see C<push_read>, below).
319		576
320	This way you can, for example, push three line-reads, followed by reading	577	This way you can, for example, push three line-reads, followed by reading
321	a chunk of data, and AnyEvent::Handle will execute them in order.	578	a chunk of data, and AnyEvent::Handle will execute them in order.
322		579
323	Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by	580	Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by
324	the specified number of bytes which give an XML datagram.	581	the specified number of bytes which give an XML datagram.
325		582
326	# in the default state, expect some header bytes	583	# in the default state, expect some header bytes
327	$handle->on_read (sub {	584	$handle->on_read (sub {
328	# some data is here, now queue the length-header-read (4 octets)	585	# some data is here, now queue the length-header-read (4 octets)
329	shift->unshift_read_chunk (4, sub {	586	shift->unshift_read (chunk => 4, sub {
330	# header arrived, decode	587	# header arrived, decode
331	my $len = unpack "N", $_[1];	588	my $len = unpack "N", $_[1];
332		589
333	# now read the payload	590	# now read the payload
334	shift->unshift_read_chunk ($len, sub {	591	shift->unshift_read (chunk => $len, sub {
335	my $xml = $_[1];	592	my $xml = $_[1];
336	# handle xml	593	# handle xml
337	});	594	});
338	});	595	});
339	});	596	});
…		…
346		603
347	# request one	604	# request one
348	$handle->push_write ("request 1\015\012");	605	$handle->push_write ("request 1\015\012");
349		606
350	# we expect "ERROR" or "OK" as response, so push a line read	607	# we expect "ERROR" or "OK" as response, so push a line read
351	$handle->push_read_line (sub {	608	$handle->push_read (line => sub {
352	# if we got an "OK", we have to _prepend_ another line,	609	# if we got an "OK", we have to _prepend_ another line,
353	# so it will be read before the second request reads its 64 bytes	610	# so it will be read before the second request reads its 64 bytes
354	# which are already in the queue when this callback is called	611	# which are already in the queue when this callback is called
355	# we don't do this in case we got an error	612	# we don't do this in case we got an error
356	if ($_[1] eq "OK") {	613	if ($_[1] eq "OK") {
357	$_[0]->unshift_read_line (sub {	614	$_[0]->unshift_read (line => sub {
358	my $response = $_[1];	615	my $response = $_[1];
359	...	616	...
360	});	617	});
361	}	618	}
362	});	619	});
363		620
364	# request two	621	# request two
365	$handle->push_write ("request 2\015\012");	622	$handle->push_write ("request 2\015\012");
366		623
367	# simply read 64 bytes, always	624	# simply read 64 bytes, always
368	$handle->push_read_chunk (64, sub {	625	$handle->push_read (chunk => 64, sub {
369	my $response = $_[1];	626	my $response = $_[1];
370	...	627	...
371	});	628	});
372		629
373	=over 4	630	=over 4
374		631
375	=cut	632	=cut
376		633
377	sub _drain_rbuf {	634	sub _drain_rbuf {
378	my ($self) = @_;	635	my ($self) = @_;
		636
		637	local $self->{_in_drain} = 1;
379		638
380	if (	639	if (
381	defined $self->{rbuf_max}	640	defined $self->{rbuf_max}
382	&& $self->{rbuf_max} < length $self->{rbuf}	641	&& $self->{rbuf_max} < length $self->{rbuf}
383	) {	642	) {
384	$! = &Errno::ENOSPC; return $self->error;	643	return $self->_error (&Errno::ENOSPC, 1);
385	}	644	}
386		645
387	return if $self->{in_drain};	646	while () {
388	local $self->{in_drain} = 1;
389
390	while (my $len = length $self->{rbuf}) {
391	no strict 'refs';	647	no strict 'refs';
		648
		649	my $len = length $self->{rbuf};
		650
392	if (my $cb = shift @{ $self->{queue} }) {	651	if (my $cb = shift @{ $self->{_queue} }) {
393	if (!$cb->($self)) {	652	unless ($cb->($self)) {
394	if ($self->{eof}) {	653	if ($self->{_eof}) {
395	# no progress can be made (not enough data and no data forthcoming)	654	# no progress can be made (not enough data and no data forthcoming)
396	$! = &Errno::EPIPE; return $self->error;	655	$self->_error (&Errno::EPIPE, 1), last;
397	}	656	}
398		657
399	unshift @{ $self->{queue} }, $cb;	658	unshift @{ $self->{_queue} }, $cb;
400	return;	659	last;
401	}	660	}
402	} elsif ($self->{on_read}) {	661	} elsif ($self->{on_read}) {
		662	last unless $len;
		663
403	$self->{on_read}($self);	664	$self->{on_read}($self);
404		665
405	if (	666	if (
406	$self->{eof} # if no further data will arrive
407	&& $len == length $self->{rbuf} # and no data has been consumed	667	$len == length $self->{rbuf} # if no data has been consumed
408	&& !@{ $self->{queue} } # and the queue is still empty	668	&& !@{ $self->{_queue} } # and the queue is still empty
409	&& $self->{on_read} # and we still want to read data	669	&& $self->{on_read} # but we still have on_read
410	) {	670	) {
		671	# no further data will arrive
411	# then no progress can be made	672	# so no progress can be made
412	$! = &Errno::EPIPE; return $self->error;	673	$self->_error (&Errno::EPIPE, 1), last
		674	if $self->{_eof};
		675
		676	last; # more data might arrive
413	}	677	}
414	} else {	678	} else {
415	# read side becomes idle	679	# read side becomes idle
416	delete $self->{rw};	680	delete $self->{_rw};
417	return;	681	last;
418	}	682	}
419	}	683	}
420		684
421	if ($self->{eof}) {
422	$self->_shutdown;
423	$self->{on_eof}($self)	685	$self->{on_eof}($self)
424	if $self->{on_eof};	686	if $self->{_eof} && $self->{on_eof};
		687
		688	# may need to restart read watcher
		689	unless ($self->{_rw}) {
		690	$self->start_read
		691	if $self->{on_read} \|\| @{ $self->{_queue} };
425	}	692	}
426	}	693	}
427		694
428	=item $handle->on_read ($cb)	695	=item $handle->on_read ($cb)
429		696
…		…
435		702
436	sub on_read {	703	sub on_read {
437	my ($self, $cb) = @_;	704	my ($self, $cb) = @_;
438		705
439	$self->{on_read} = $cb;	706	$self->{on_read} = $cb;
		707	$self->_drain_rbuf if $cb && !$self->{_in_drain};
440	}	708	}
441		709
442	=item $handle->rbuf	710	=item $handle->rbuf
443		711
444	Returns the read buffer (as a modifiable lvalue).	712	Returns the read buffer (as a modifiable lvalue).
…		…
463	Append the given callback to the end of the queue (C<push_read>) or	731	Append the given callback to the end of the queue (C<push_read>) or
464	prepend it (C<unshift_read>).	732	prepend it (C<unshift_read>).
465		733
466	The callback is called each time some additional read data arrives.	734	The callback is called each time some additional read data arrives.
467		735
468	It must check wether enough data is in the read buffer already.	736	It must check whether enough data is in the read buffer already.
469		737
470	If not enough data is available, it must return the empty list or a false	738	If not enough data is available, it must return the empty list or a false
471	value, in which case it will be called repeatedly until enough data is	739	value, in which case it will be called repeatedly until enough data is
472	available (or an error condition is detected).	740	available (or an error condition is detected).
473		741
…		…
475	interested in (which can be none at all) and return a true value. After returning	743	interested in (which can be none at all) and return a true value. After returning
476	true, it will be removed from the queue.	744	true, it will be removed from the queue.
477		745
478	=cut	746	=cut
479		747
		748	our %RH;
		749
		750	sub register_read_type($$) {
		751	$RH{$_[0]} = $_[1];
		752	}
		753
480	sub push_read {	754	sub push_read {
481	my ($self, $cb) = @_;	755	my $self = shift;
		756	my $cb = pop;
482		757
		758	if (@_) {
		759	my $type = shift;
		760
		761	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
		762	->($self, $cb, @_);
		763	}
		764
483	push @{ $self->{queue} }, $cb;	765	push @{ $self->{_queue} }, $cb;
484	$self->_drain_rbuf;	766	$self->_drain_rbuf unless $self->{_in_drain};
485	}	767	}
486		768
487	sub unshift_read {	769	sub unshift_read {
488	my ($self, $cb) = @_;	770	my $self = shift;
		771	my $cb = pop;
489		772
		773	if (@_) {
		774	my $type = shift;
		775
		776	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read")
		777	->($self, $cb, @_);
		778	}
		779
		780
490	push @{ $self->{queue} }, $cb;	781	unshift @{ $self->{_queue} }, $cb;
491	$self->_drain_rbuf;	782	$self->_drain_rbuf unless $self->{_in_drain};
492	}	783	}
493		784
494	=item $handle->push_read_chunk ($len, $cb->($self, $data))	785	=item $handle->push_read (type => @args, $cb)
495		786
496	=item $handle->unshift_read_chunk ($len, $cb->($self, $data))	787	=item $handle->unshift_read (type => @args, $cb)
497		788
498	Append the given callback to the end of the queue (C<push_read_chunk>) or	789	Instead of providing a callback that parses the data itself you can chose
499	prepend it (C<unshift_read_chunk>).	790	between a number of predefined parsing formats, for chunks of data, lines
		791	etc.
500		792
501	The callback will be called only once C<$len> bytes have been read, and	793	Predefined types are (if you have ideas for additional types, feel free to
502	these C<$len> bytes will be passed to the callback.	794	drop by and tell us):
503		795
504	=cut	796	=over 4
505		797
506	sub _read_chunk($$) {	798	=item chunk => $octets, $cb->($handle, $data)
		799
		800	Invoke the callback only once C<$octets> bytes have been read. Pass the
		801	data read to the callback. The callback will never be called with less
		802	data.
		803
		804	Example: read 2 bytes.
		805
		806	$handle->push_read (chunk => 2, sub {
		807	warn "yay ", unpack "H*", $_[1];
		808	});
		809
		810	=cut
		811
		812	register_read_type chunk => sub {
507	my ($self, $len, $cb) = @_;	813	my ($self, $cb, $len) = @_;
508		814
509	sub {	815	sub {
510	$len <= length $_[0]{rbuf} or return;	816	$len <= length $_[0]{rbuf} or return;
511	$cb->($_[0], substr $_[0]{rbuf}, 0, $len, "");	817	$cb->($_[0], substr $_[0]{rbuf}, 0, $len, "");
512	1	818	1
513	}	819	}
514	}	820	};
515		821
		822	# compatibility with older API
516	sub push_read_chunk {	823	sub push_read_chunk {
517	$_[0]->push_read (&_read_chunk);	824	$_[0]->push_read (chunk => $_[1], $_[2]);
518	}	825	}
519
520		826
521	sub unshift_read_chunk {	827	sub unshift_read_chunk {
522	$_[0]->unshift_read (&_read_chunk);	828	$_[0]->unshift_read (chunk => $_[1], $_[2]);
523	}	829	}
524		830
525	=item $handle->push_read_line ([$eol, ]$cb->($self, $line, $eol))	831	=item line => [$eol, ]$cb->($handle, $line, $eol)
526
527	=item $handle->unshift_read_line ([$eol, ]$cb->($self, $line, $eol))
528
529	Append the given callback to the end of the queue (C<push_read_line>) or
530	prepend it (C<unshift_read_line>).
531		832
532	The callback will be called only once a full line (including the end of	833	The callback will be called only once a full line (including the end of
533	line marker, C<$eol>) has been read. This line (excluding the end of line	834	line marker, C<$eol>) has been read. This line (excluding the end of line
534	marker) will be passed to the callback as second argument (C<$line>), and	835	marker) will be passed to the callback as second argument (C<$line>), and
535	the end of line marker as the third argument (C<$eol>).	836	the end of line marker as the third argument (C<$eol>).
…		…
546	Partial lines at the end of the stream will never be returned, as they are	847	Partial lines at the end of the stream will never be returned, as they are
547	not marked by the end of line marker.	848	not marked by the end of line marker.
548		849
549	=cut	850	=cut
550		851
551	sub _read_line($$) {	852	register_read_type line => sub {
552	my $self = shift;	853	my ($self, $cb, $eol) = @_;
553	my $cb = pop;
554	my $eol = @_ ? shift : qr\|(\015?\012)\|;
555	my $pos;
556		854
		855	$eol = qr\|(\015?\012)\| if @_ < 3;
557	$eol = quotemeta $eol unless ref $eol;	856	$eol = quotemeta $eol unless ref $eol;
558	$eol = qr\|^(.*?)($eol)\|s;	857	$eol = qr\|^(.*?)($eol)\|s;
559		858
560	sub {	859	sub {
561	$_[0]{rbuf} =~ s/$eol// or return;	860	$_[0]{rbuf} =~ s/$eol// or return;
562		861
563	$cb->($_[0], $1, $2);	862	$cb->($_[0], $1, $2);
564	1	863	1
565	}	864	}
566	}	865	};
567		866
		867	# compatibility with older API
568	sub push_read_line {	868	sub push_read_line {
569	$_[0]->push_read (&_read_line);	869	my $self = shift;
		870	$self->push_read (line => @_);
570	}	871	}
571		872
572	sub unshift_read_line {	873	sub unshift_read_line {
573	$_[0]->unshift_read (&_read_line);	874	my $self = shift;
		875	$self->unshift_read (line => @_);
574	}	876	}
		877
		878	=item regex => $accept[, $reject[, $skip], $cb->($handle, $data)
		879
		880	Makes a regex match against the regex object C<$accept> and returns
		881	everything up to and including the match.
		882
		883	Example: read a single line terminated by '\n'.
		884
		885	$handle->push_read (regex => qr<\n>, sub { ... });
		886
		887	If C<$reject> is given and not undef, then it determines when the data is
		888	to be rejected: it is matched against the data when the C<$accept> regex
		889	does not match and generates an C<EBADMSG> error when it matches. This is
		890	useful to quickly reject wrong data (to avoid waiting for a timeout or a
		891	receive buffer overflow).
		892
		893	Example: expect a single decimal number followed by whitespace, reject
		894	anything else (not the use of an anchor).
		895
		896	$handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... });
		897
		898	If C<$skip> is given and not C<undef>, then it will be matched against
		899	the receive buffer when neither C<$accept> nor C<$reject> match,
		900	and everything preceding and including the match will be accepted
		901	unconditionally. This is useful to skip large amounts of data that you
		902	know cannot be matched, so that the C<$accept> or C<$reject> regex do not
		903	have to start matching from the beginning. This is purely an optimisation
		904	and is usually worth only when you expect more than a few kilobytes.
		905
		906	Example: expect a http header, which ends at C<\015\012\015\012>. Since we
		907	expect the header to be very large (it isn't in practise, but...), we use
		908	a skip regex to skip initial portions. The skip regex is tricky in that
		909	it only accepts something not ending in either \015 or \012, as these are
		910	required for the accept regex.
		911
		912	$handle->push_read (regex =>
		913	qr<\015\012\015\012>,
		914	undef, # no reject
		915	qr<^.*[^\015\012]>,
		916	sub { ... });
		917
		918	=cut
		919
		920	register_read_type regex => sub {
		921	my ($self, $cb, $accept, $reject, $skip) = @_;
		922
		923	my $data;
		924	my $rbuf = \$self->{rbuf};
		925
		926	sub {
		927	# accept
		928	if ($$rbuf =~ $accept) {
		929	$data .= substr $$rbuf, 0, $+[0], "";
		930	$cb->($self, $data);
		931	return 1;
		932	}
		933
		934	# reject
		935	if ($reject && $$rbuf =~ $reject) {
		936	$self->_error (&Errno::EBADMSG);
		937	}
		938
		939	# skip
		940	if ($skip && $$rbuf =~ $skip) {
		941	$data .= substr $$rbuf, 0, $+[0], "";
		942	}
		943
		944	()
		945	}
		946	};
		947
		948	=item netstring => $cb->($handle, $string)
		949
		950	A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement).
		951
		952	Throws an error with C<$!> set to EBADMSG on format violations.
		953
		954	=cut
		955
		956	register_read_type netstring => sub {
		957	my ($self, $cb) = @_;
		958
		959	sub {
		960	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {
		961	if ($_[0]{rbuf} =~ /[^0-9]/) {
		962	$self->_error (&Errno::EBADMSG);
		963	}
		964	return;
		965	}
		966
		967	my $len = $1;
		968
		969	$self->unshift_read (chunk => $len, sub {
		970	my $string = $_[1];
		971	$_[0]->unshift_read (chunk => 1, sub {
		972	if ($_[1] eq ",") {
		973	$cb->($_[0], $string);
		974	} else {
		975	$self->_error (&Errno::EBADMSG);
		976	}
		977	});
		978	});
		979
		980	1
		981	}
		982	};
		983
		984	=item packstring => $format, $cb->($handle, $string)
		985
		986	An octet string prefixed with an encoded length. The encoding C<$format>
		987	uses the same format as a Perl C<pack> format, but must specify a single
		988	integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an
		989	optional C<!>, C<< < >> or C<< > >> modifier).
		990
		991	DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>.
		992
		993	Example: read a block of data prefixed by its length in BER-encoded
		994	format (very efficient).
		995
		996	$handle->push_read (packstring => "w", sub {
		997	my ($handle, $data) = @_;
		998	});
		999
		1000	=cut
		1001
		1002	register_read_type packstring => sub {
		1003	my ($self, $cb, $format) = @_;
		1004
		1005	sub {
		1006	# when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method
		1007	defined (my $len = eval { unpack $format, $_[0]->{rbuf} })
		1008	or return;
		1009
		1010	# remove prefix
		1011	substr $_[0]->{rbuf}, 0, (length pack $format, $len), "";
		1012
		1013	# read rest
		1014	$_[0]->unshift_read (chunk => $len, $cb);
		1015
		1016	1
		1017	}
		1018	};
		1019
		1020	=item json => $cb->($handle, $hash_or_arrayref)
		1021
		1022	Reads a JSON object or array, decodes it and passes it to the callback.
		1023
		1024	If a C<json> object was passed to the constructor, then that will be used
		1025	for the final decode, otherwise it will create a JSON coder expecting UTF-8.
		1026
		1027	This read type uses the incremental parser available with JSON version
		1028	2.09 (and JSON::XS version 2.2) and above. You have to provide a
		1029	dependency on your own: this module will load the JSON module, but
		1030	AnyEvent does not depend on it itself.
		1031
		1032	Since JSON texts are fully self-delimiting, the C<json> read and write
		1033	types are an ideal simple RPC protocol: just exchange JSON datagrams. See
		1034	the C<json> write type description, above, for an actual example.
		1035
		1036	=cut
		1037
		1038	register_read_type json => sub {
		1039	my ($self, $cb, $accept, $reject, $skip) = @_;
		1040
		1041	require JSON;
		1042
		1043	my $data;
		1044	my $rbuf = \$self->{rbuf};
		1045
		1046	my $json = $self->{json} \|\|= JSON->new->utf8;
		1047
		1048	sub {
		1049	my $ref = $json->incr_parse ($self->{rbuf});
		1050
		1051	if ($ref) {
		1052	$self->{rbuf} = $json->incr_text;
		1053	$json->incr_text = "";
		1054	$cb->($self, $ref);
		1055
		1056	1
		1057	} else {
		1058	$self->{rbuf} = "";
		1059	()
		1060	}
		1061	}
		1062	};
		1063
		1064	=back
		1065
		1066	=item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args)
		1067
		1068	This function (not method) lets you add your own types to C<push_read>.
		1069
		1070	Whenever the given C<type> is used, C<push_read> will invoke the code
		1071	reference with the handle object, the callback and the remaining
		1072	arguments.
		1073
		1074	The code reference is supposed to return a callback (usually a closure)
		1075	that works as a plain read callback (see C<< ->push_read ($cb) >>).
		1076
		1077	It should invoke the passed callback when it is done reading (remember to
		1078	pass C<$handle> as first argument as all other callbacks do that).
		1079
		1080	Note that this is a function, and all types registered this way will be
		1081	global, so try to use unique names.
		1082
		1083	For examples, see the source of this module (F<perldoc -m AnyEvent::Handle>,
		1084	search for C<register_read_type>)).
575		1085
576	=item $handle->stop_read	1086	=item $handle->stop_read
577		1087
578	=item $handle->start_read	1088	=item $handle->start_read
579		1089
580	In rare cases you actually do not want to read anything form the	1090	In rare cases you actually do not want to read anything from the
581	socket. In this case you can call C<stop_read>. Neither C<on_read> no	1091	socket. In this case you can call C<stop_read>. Neither C<on_read> nor
582	any queued callbacks will be executed then. To start readign again, call	1092	any queued callbacks will be executed then. To start reading again, call
583	C<start_read>.	1093	C<start_read>.
		1094
		1095	Note that AnyEvent::Handle will automatically C<start_read> for you when
		1096	you change the C<on_read> callback or push/unshift a read callback, and it
		1097	will automatically C<stop_read> for you when neither C<on_read> is set nor
		1098	there are any read requests in the queue.
584		1099
585	=cut	1100	=cut
586		1101
587	sub stop_read {	1102	sub stop_read {
588	my ($self) = @_;	1103	my ($self) = @_;
589		1104
590	delete $self->{rw};	1105	delete $self->{_rw};
591	}	1106	}
592		1107
593	sub start_read {	1108	sub start_read {
594	my ($self) = @_;	1109	my ($self) = @_;
595		1110
596	unless ($self->{rw} \|\| $self->{eof}) {	1111	unless ($self->{_rw} \|\| $self->{_eof}) {
597	Scalar::Util::weaken $self;	1112	Scalar::Util::weaken $self;
598		1113
599	$self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {	1114	$self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {
600	my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf};	1115	my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf};
601	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} \|\| 8192, length $$rbuf;	1116	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} \|\| 8192, length $$rbuf;
602		1117
603	if ($len > 0) {	1118	if ($len > 0) {
		1119	$self->{_activity} = AnyEvent->now;
		1120
604	$self->{filter_r}	1121	$self->{filter_r}
605	? $self->{filter_r}->($rbuf)	1122	? $self->{filter_r}($self, $rbuf)
606	: $self->_drain_rbuf;	1123	: $self->{_in_drain} \|\| $self->_drain_rbuf;
607		1124
608	} elsif (defined $len) {	1125	} elsif (defined $len) {
609	delete $self->{rw};	1126	delete $self->{_rw};
610	$self->{eof} = 1;	1127	$self->{_eof} = 1;
611	$self->_drain_rbuf;	1128	$self->_drain_rbuf unless $self->{_in_drain};
612		1129
613	} elsif ($! != EAGAIN && $! != EINTR) {	1130	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
614	return $self->error;	1131	return $self->_error ($!, 1);
615	}	1132	}
616	});	1133	});
617	}	1134	}
618	}	1135	}
619		1136
		1137	sub _dotls {
		1138	my ($self) = @_;
		1139
		1140	my $buf;
		1141
		1142	if (length $self->{_tls_wbuf}) {
		1143	while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
		1144	substr $self->{_tls_wbuf}, 0, $len, "";
		1145	}
		1146	}
		1147
		1148	if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) {
		1149	$self->{wbuf} .= $buf;
		1150	$self->_drain_wbuf;
		1151	}
		1152
		1153	while (defined ($buf = Net::SSLeay::read ($self->{tls}))) {
		1154	if (length $buf) {
		1155	$self->{rbuf} .= $buf;
		1156	$self->_drain_rbuf unless $self->{_in_drain};
		1157	} else {
		1158	# let's treat SSL-eof as we treat normal EOF
		1159	$self->{_eof} = 1;
		1160	$self->_shutdown;
		1161	return;
		1162	}
		1163	}
		1164
		1165	my $err = Net::SSLeay::get_error ($self->{tls}, -1);
		1166
		1167	if ($err!= Net::SSLeay::ERROR_WANT_READ ()) {
		1168	if ($err == Net::SSLeay::ERROR_SYSCALL ()) {
		1169	return $self->_error ($!, 1);
		1170	} elsif ($err == Net::SSLeay::ERROR_SSL ()) {
		1171	return $self->_error (&Errno::EIO, 1);
		1172	}
		1173
		1174	# all others are fine for our purposes
		1175	}
		1176	}
		1177
		1178	=item $handle->starttls ($tls[, $tls_ctx])
		1179
		1180	Instead of starting TLS negotiation immediately when the AnyEvent::Handle
		1181	object is created, you can also do that at a later time by calling
		1182	C<starttls>.
		1183
		1184	The first argument is the same as the C<tls> constructor argument (either
		1185	C<"connect">, C<"accept"> or an existing Net::SSLeay object).
		1186
		1187	The second argument is the optional C<Net::SSLeay::CTX> object that is
		1188	used when AnyEvent::Handle has to create its own TLS connection object.
		1189
		1190	The TLS connection object will end up in C<< $handle->{tls} >> after this
		1191	call and can be used or changed to your liking. Note that the handshake
		1192	might have already started when this function returns.
		1193
		1194	=cut
		1195
		1196	sub starttls {
		1197	my ($self, $ssl, $ctx) = @_;
		1198
		1199	$self->stoptls;
		1200
		1201	if ($ssl eq "accept") {
		1202	$ssl = Net::SSLeay::new ($ctx \|\| TLS_CTX ());
		1203	Net::SSLeay::set_accept_state ($ssl);
		1204	} elsif ($ssl eq "connect") {
		1205	$ssl = Net::SSLeay::new ($ctx \|\| TLS_CTX ());
		1206	Net::SSLeay::set_connect_state ($ssl);
		1207	}
		1208
		1209	$self->{tls} = $ssl;
		1210
		1211	# basically, this is deep magic (because SSL_read should have the same issues)
		1212	# but the openssl maintainers basically said: "trust us, it just works".
		1213	# (unfortunately, we have to hardcode constants because the abysmally misdesigned
		1214	# and mismaintained ssleay-module doesn't even offer them).
		1215	# http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html
		1216	Net::SSLeay::CTX_set_mode ($self->{tls},
		1217	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)
		1218	\| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));
		1219
		1220	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
		1221	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
		1222
		1223	Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});
		1224
		1225	$self->{filter_w} = sub {
		1226	$_[0]{_tls_wbuf} .= ${$_[1]};
		1227	&_dotls;
		1228	};
		1229	$self->{filter_r} = sub {
		1230	Net::SSLeay::BIO_write ($_[0]{_rbio}, ${$_[1]});
		1231	&_dotls;
		1232	};
		1233	}
		1234
		1235	=item $handle->stoptls
		1236
		1237	Destroys the SSL connection, if any. Partial read or write data will be
		1238	lost.
		1239
		1240	=cut
		1241
		1242	sub stoptls {
		1243	my ($self) = @_;
		1244
		1245	Net::SSLeay::free (delete $self->{tls}) if $self->{tls};
		1246
		1247	delete $self->{_rbio};
		1248	delete $self->{_wbio};
		1249	delete $self->{_tls_wbuf};
		1250	delete $self->{filter_r};
		1251	delete $self->{filter_w};
		1252	}
		1253
		1254	sub DESTROY {
		1255	my $self = shift;
		1256
		1257	$self->stoptls;
		1258	}
		1259
		1260	=item AnyEvent::Handle::TLS_CTX
		1261
		1262	This function creates and returns the Net::SSLeay::CTX object used by
		1263	default for TLS mode.
		1264
		1265	The context is created like this:
		1266
		1267	Net::SSLeay::load_error_strings;
		1268	Net::SSLeay::SSLeay_add_ssl_algorithms;
		1269	Net::SSLeay::randomize;
		1270
		1271	my $CTX = Net::SSLeay::CTX_new;
		1272
		1273	Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL
		1274
		1275	=cut
		1276
		1277	our $TLS_CTX;
		1278
		1279	sub TLS_CTX() {
		1280	$TLS_CTX \|\| do {
		1281	require Net::SSLeay;
		1282
		1283	Net::SSLeay::load_error_strings ();
		1284	Net::SSLeay::SSLeay_add_ssl_algorithms ();
		1285	Net::SSLeay::randomize ();
		1286
		1287	$TLS_CTX = Net::SSLeay::CTX_new ();
		1288
		1289	Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ());
		1290
		1291	$TLS_CTX
		1292	}
		1293	}
		1294
620	=back	1295	=back
621		1296
		1297	=head1 SUBCLASSING AnyEvent::Handle
		1298
		1299	In many cases, you might want to subclass AnyEvent::Handle.
		1300
		1301	To make this easier, a given version of AnyEvent::Handle uses these
		1302	conventions:
		1303
		1304	=over 4
		1305
		1306	=item * all constructor arguments become object members.
		1307
		1308	At least initially, when you pass a C<tls>-argument to the constructor it
		1309	will end up in C<< $handle->{tls} >>. Those members might be changes or
		1310	mutated later on (for example C<tls> will hold the TLS connection object).
		1311
		1312	=item * other object member names are prefixed with an C<_>.
		1313
		1314	All object members not explicitly documented (internal use) are prefixed
		1315	with an underscore character, so the remaining non-C<_>-namespace is free
		1316	for use for subclasses.
		1317
		1318	=item * all members not documented here and not prefixed with an underscore
		1319	are free to use in subclasses.
		1320
		1321	Of course, new versions of AnyEvent::Handle may introduce more "public"
		1322	member variables, but thats just life, at least it is documented.
		1323
		1324	=back
		1325
622	=head1 AUTHOR	1326	=head1 AUTHOR
623		1327
624	Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>.	1328	Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>.
625		1329
626	=cut	1330	=cut

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.17 by root, Sat May 24 04:17:45 2008 UTC vs. Revision 1.61 by root, Fri Jun 6 10:23:50 2008 UTC

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.17 by root, Sat May 24 04:17:45 2008 UTC vs.
Revision 1.61 by root, Fri Jun 6 10:23:50 2008 UTC