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

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.44 by root, Thu May 29 00:00:07 2008 UTC vs.
Revision 1.87 by root, Thu Aug 21 20:52:39 2008 UTC

…		…
1	package AnyEvent::Handle;	1	package AnyEvent::Handle;
2		2
3	no warnings;	3	no warnings;
4	use strict;	4	use strict qw(subs vars);
5		5
6	use AnyEvent ();	6	use AnyEvent ();
7	use AnyEvent::Util qw(WSAEWOULDBLOCK);	7	use AnyEvent::Util qw(WSAEWOULDBLOCK);
8	use Scalar::Util ();	8	use Scalar::Util ();
9	use Carp ();	9	use Carp ();
14		14
15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent	15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16		16
17	=cut	17	=cut
18		18
19	our $VERSION = '0.04';	19	our $VERSION = 4.232;
20		20
21	=head1 SYNOPSIS	21	=head1 SYNOPSIS
22		22
23	use AnyEvent;	23	use AnyEvent;
24	use AnyEvent::Handle;	24	use AnyEvent::Handle;
…		…
49		49
50	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
51	filehandles. For utility functions for doing non-blocking connects and accepts	51	filehandles. For utility functions for doing non-blocking connects and accepts
52	on sockets see L<AnyEvent::Util>.	52	on sockets see L<AnyEvent::Util>.
53		53
		54	The L<AnyEvent::Intro> tutorial contains some well-documented
		55	AnyEvent::Handle examples.
		56
54	In the following, when the documentation refers to of "bytes" then this	57	In the following, when the documentation refers to of "bytes" then this
55	means characters. As sysread and syswrite are used for all I/O, their	58	means characters. As sysread and syswrite are used for all I/O, their
56	treatment of characters applies to this module as well.	59	treatment of characters applies to this module as well.
57		60
58	All callbacks will be invoked with the handle object as their first	61	All callbacks will be invoked with the handle object as their first
…		…
70		73
71	=item fh => $filehandle [MANDATORY]	74	=item fh => $filehandle [MANDATORY]
72		75
73	The filehandle this L<AnyEvent::Handle> object will operate on.	76	The filehandle this L<AnyEvent::Handle> object will operate on.
74		77
75	NOTE: The filehandle will be set to non-blocking (using	78	NOTE: The filehandle will be set to non-blocking mode (using
76	AnyEvent::Util::fh_nonblocking).	79	C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in
		80	that mode.
77		81
78	=item on_eof => $cb->($handle)	82	=item on_eof => $cb->($handle)
79		83
80	Set the callback to be called on EOF.	84	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
		86	connection cleanly.
81		87
		88	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
		90	callback and continue writing data, as only the read part has been shut
		91	down.
		92
82	While not mandatory, it is highly recommended to set an eof callback,	93	While not mandatory, it is I<highly> recommended to set an eof callback,
83	otherwise you might end up with a closed socket while you are still	94	otherwise you might end up with a closed socket while you are still
84	waiting for data.	95	waiting for data.
85		96
		97	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>.
		99
86	=item on_error => $cb->($handle)	100	=item on_error => $cb->($handle, $fatal)
87		101
88	This is the fatal error callback, that is called when, well, a fatal error	102	This is the error callback, which is called when, well, some error
89	occurs, such as not being able to resolve the hostname, failure to connect	103	occured, such as not being able to resolve the hostname, failure to
90	or a read error.	104	connect or a read error.
91		105
92	The object will not be in a usable state when this callback has been	106	Some errors are fatal (which is indicated by C<$fatal> being true). On
93	called.	107	fatal errors the handle object will be shut down and will not be usable
		108	(but you are free to look at the current C< ->rbuf >). Examples of fatal
		109	errors are an EOF condition with active (but unsatisifable) read watchers
		110	(C<EPIPE>) or I/O errors.
		111
		112	Non-fatal errors can be retried by simply returning, but it is recommended
		113	to simply ignore this parameter and instead abondon the handle object
		114	when this callback is invoked. Examples of non-fatal errors are timeouts
		115	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
94		116
95	On callback entrance, the value of C<$!> contains the operating system	117	On callback entrance, the value of C<$!> contains the operating system
96	error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>).	118	error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>).
97		119
98	The callback should throw an exception. If it returns, then
99	AnyEvent::Handle will C<croak> for you.
100
101	While not mandatory, it is I<highly> recommended to set this callback, as	120	While not mandatory, it is I<highly> recommended to set this callback, as
102	you will not be notified of errors otherwise. The default simply calls	121	you will not be notified of errors otherwise. The default simply calls
103	die.	122	C<croak>.
104		123
105	=item on_read => $cb->($handle)	124	=item on_read => $cb->($handle)
106		125
107	This sets the default read callback, which is called when data arrives	126	This sets the default read callback, which is called when data arrives
108	and no read request is in the queue.	127	and no read request is in the queue (unlike read queue callbacks, this
		128	callback will only be called when at least one octet of data is in the
		129	read buffer).
109		130
110	To access (and remove data from) the read buffer, use the C<< ->rbuf >>	131	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
111	method or access the C<$handle->{rbuf}> member directly.	132	method or access the C<$handle->{rbuf}> member directly.
112		133
113	When an EOF condition is detected then AnyEvent::Handle will first try to	134	When an EOF condition is detected then AnyEvent::Handle will first try to
…		…
120	This sets the callback that is called when the write buffer becomes empty	141	This sets the callback that is called when the write buffer becomes empty
121	(or when the callback is set and the buffer is empty already).	142	(or when the callback is set and the buffer is empty already).
122		143
123	To append to the write buffer, use the C<< ->push_write >> method.	144	To append to the write buffer, use the C<< ->push_write >> method.
124		145
		146	This callback is useful when you don't want to put all of your write data
		147	into the queue at once, for example, when you want to write the contents
		148	of some file to the socket you might not want to read the whole file into
		149	memory and push it into the queue, but instead only read more data from
		150	the file when the write queue becomes empty.
		151
125	=item timeout => $fractional_seconds	152	=item timeout => $fractional_seconds
126		153
127	If non-zero, then this enables an "inactivity" timeout: whenever this many	154	If non-zero, then this enables an "inactivity" timeout: whenever this many
128	seconds pass without a successful read or write on the underlying file	155	seconds pass without a successful read or write on the underlying file
129	handle, the C<on_timeout> callback will be invoked (and if that one is	156	handle, the C<on_timeout> callback will be invoked (and if that one is
130	missing, an C<ETIMEDOUT> errror will be raised).	157	missing, an C<ETIMEDOUT> error will be raised).
131		158
132	Note that timeout processing is also active when you currently do not have	159	Note that timeout processing is also active when you currently do not have
133	any outstanding read or write requests: If you plan to keep the connection	160	any outstanding read or write requests: If you plan to keep the connection
134	idle then you should disable the timout temporarily or ignore the timeout	161	idle then you should disable the timout temporarily or ignore the timeout
135	in the C<on_timeout> callback.	162	in the C<on_timeout> callback.
…		…
152	be configured to accept only so-and-so much data that it cannot act on	179	be configured to accept only so-and-so much data that it cannot act on
153	(for example, when expecting a line, an attacker could send an unlimited	180	(for example, when expecting a line, an attacker could send an unlimited
154	amount of data without a callback ever being called as long as the line	181	amount of data without a callback ever being called as long as the line
155	isn't finished).	182	isn't finished).
156		183
		184	=item autocork => <boolean>
		185
		186	When disabled (the default), then C<push_write> will try to immediately
		187	write the data to the handle if possible. This avoids having to register
		188	a write watcher and wait for the next event loop iteration, but can be
		189	inefficient if you write multiple small chunks (this disadvantage is
		190	usually avoided by your kernel's nagle algorithm, see C<low_delay>).
		191
		192	When enabled, then writes will always be queued till the next event loop
		193	iteration. This is efficient when you do many small writes per iteration,
		194	but less efficient when you do a single write only.
		195
		196	=item no_delay => <boolean>
		197
		198	When doing small writes on sockets, your operating system kernel might
		199	wait a bit for more data before actually sending it out. This is called
		200	the Nagle algorithm, and usually it is beneficial.
		201
		202	In some situations you want as low a delay as possible, which cna be
		203	accomplishd by setting this option to true.
		204
		205	The default is your opertaing system's default behaviour, this option
		206	explicitly enables or disables it, if possible.
		207
157	=item read_size => <bytes>	208	=item read_size => <bytes>
158		209
159	The default read block size (the amount of bytes this module will try to read	210	The default read block size (the amount of bytes this module will try to read
160	on each [loop iteration). Default: C<4096>.	211	during each (loop iteration). Default: C<8192>.
161		212
162	=item low_water_mark => <bytes>	213	=item low_water_mark => <bytes>
163		214
164	Sets the amount of bytes (default: C<0>) that make up an "empty" write	215	Sets the amount of bytes (default: C<0>) that make up an "empty" write
165	buffer: If the write reaches this size or gets even samller it is	216	buffer: If the write reaches this size or gets even samller it is
166	considered empty.	217	considered empty.
167		218
		219	=item linger => <seconds>
		220
		221	If non-zero (default: C<3600>), then the destructor of the
		222	AnyEvent::Handle object will check wether there is still outstanding write
		223	data and will install a watcher that will write out this data. No errors
		224	will be reported (this mostly matches how the operating system treats
		225	outstanding data at socket close time).
		226
		227	This will not work for partial TLS data that could not yet been
		228	encoded. This data will be lost.
		229
168	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object	230	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
169		231
170	When this parameter is given, it enables TLS (SSL) mode, that means it	232	When this parameter is given, it enables TLS (SSL) mode, that means
171	will start making tls handshake and will transparently encrypt/decrypt	233	AnyEvent will start a TLS handshake and will transparently encrypt/decrypt
172	data.	234	data.
173		235
174	TLS mode requires Net::SSLeay to be installed (it will be loaded	236	TLS mode requires Net::SSLeay to be installed (it will be loaded
175	automatically when you try to create a TLS handle).	237	automatically when you try to create a TLS handle).
176		238
177	For the TLS server side, use C<accept>, and for the TLS client side of a	239	Unlike TCP, TLS has a server and client side: for the TLS server side, use
178	connection, use C<connect> mode.	240	C<accept>, and for the TLS client side of a connection, use C<connect>
		241	mode.
179		242
180	You can also provide your own TLS connection object, but you have	243	You can also provide your own TLS connection object, but you have
181	to make sure that you call either C<Net::SSLeay::set_connect_state>	244	to make sure that you call either C<Net::SSLeay::set_connect_state>
182	or C<Net::SSLeay::set_accept_state> on it before you pass it to	245	or C<Net::SSLeay::set_accept_state> on it before you pass it to
183	AnyEvent::Handle.	246	AnyEvent::Handle.
184		247
185	See the C<starttls> method if you need to start TLs negotiation later.	248	See the C<starttls> method for when need to start TLS negotiation later.
186		249
187	=item tls_ctx => $ssl_ctx	250	=item tls_ctx => $ssl_ctx
188		251
189	Use the given Net::SSLeay::CTX object to create the new TLS connection	252	Use the given Net::SSLeay::CTX object to create the new TLS connection
190	(unless a connection object was specified directly). If this parameter is	253	(unless a connection object was specified directly). If this parameter is
…		…
193	=item json => JSON or JSON::XS object	256	=item json => JSON or JSON::XS object
194		257
195	This is the json coder object used by the C<json> read and write types.	258	This is the json coder object used by the C<json> read and write types.
196		259
197	If you don't supply it, then AnyEvent::Handle will create and use a	260	If you don't supply it, then AnyEvent::Handle will create and use a
198	suitable one, which will write and expect UTF-8 encoded JSON texts.	261	suitable one (on demand), which will write and expect UTF-8 encoded JSON
		262	texts.
199		263
200	Note that you are responsible to depend on the JSON module if you want to	264	Note that you are responsible to depend on the JSON module if you want to
201	use this functionality, as AnyEvent does not have a dependency itself.	265	use this functionality, as AnyEvent does not have a dependency itself.
202		266
203	=item filter_r => $cb	267	=item filter_r => $cb
204		268
205	=item filter_w => $cb	269	=item filter_w => $cb
206		270
207	These exist, but are undocumented at this time.	271	These exist, but are undocumented at this time. (They are used internally
		272	by the TLS code).
208		273
209	=back	274	=back
210		275
211	=cut	276	=cut
212		277
…		…
222	if ($self->{tls}) {	287	if ($self->{tls}) {
223	require Net::SSLeay;	288	require Net::SSLeay;
224	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx});	289	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx});
225	}	290	}
226		291
227	# $self->on_eof (delete $self->{on_eof} ) if $self->{on_eof}; # nop
228	# $self->on_error (delete $self->{on_error}) if $self->{on_error}; # nop
229	# $self->on_read (delete $self->{on_read} ) if $self->{on_read}; # nop
230	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};
231
232	$self->{_activity} = AnyEvent->now;	292	$self->{_activity} = AnyEvent->now;
233	$self->_timeout;	293	$self->_timeout;
234		294
		295	$self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain};
		296	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};
		297
235	$self->start_read;	298	$self->start_read
		299	if $self->{on_read};
236		300
237	$self	301	$self
238	}	302	}
239		303
240	sub _shutdown {	304	sub _shutdown {
241	my ($self) = @_;	305	my ($self) = @_;
242		306
		307	delete $self->{_tw};
243	delete $self->{_rw};	308	delete $self->{_rw};
244	delete $self->{_ww};	309	delete $self->{_ww};
245	delete $self->{fh};	310	delete $self->{fh};
246	}
247		311
		312	$self->stoptls;
		313
		314	delete $self->{on_read};
		315	delete $self->{_queue};
		316	}
		317
248	sub error {	318	sub _error {
249	my ($self) = @_;	319	my ($self, $errno, $fatal) = @_;
250		320
251	{
252	local $!;
253	$self->_shutdown;	321	$self->_shutdown
254	}	322	if $fatal;
255		323
256	$self->{on_error}($self)	324	$! = $errno;
		325
257	if $self->{on_error};	326	if ($self->{on_error}) {
258		327	$self->{on_error}($self, $fatal);
		328	} else {
259	Carp::croak "AnyEvent::Handle uncaught fatal error: $!";	329	Carp::croak "AnyEvent::Handle uncaught error: $!";
		330	}
260	}	331	}
261		332
262	=item $fh = $handle->fh	333	=item $fh = $handle->fh
263		334
264	This method returns the file handle of the L<AnyEvent::Handle> object.	335	This method returns the file handle of the L<AnyEvent::Handle> object.
…		…
295		366
296	=cut	367	=cut
297		368
298	sub on_timeout {	369	sub on_timeout {
299	$_[0]{on_timeout} = $_[1];	370	$_[0]{on_timeout} = $_[1];
		371	}
		372
		373	=item $handle->autocork ($boolean)
		374
		375	Enables or disables the current autocork behaviour (see C<autocork>
		376	constructor argument).
		377
		378	=cut
		379
		380	=item $handle->no_delay ($boolean)
		381
		382	Enables or disables the C<no_delay> setting (see constructor argument of
		383	the same name for details).
		384
		385	=cut
		386
		387	sub no_delay {
		388	$_[0]{no_delay} = $_[1];
		389
		390	eval {
		391	local $SIG{__DIE__};
		392	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1];
		393	};
300	}	394	}
301		395
302	#############################################################################	396	#############################################################################
303		397
304	=item $handle->timeout ($seconds)	398	=item $handle->timeout ($seconds)
…		…
328	# now or in the past already?	422	# now or in the past already?
329	if ($after <= 0) {	423	if ($after <= 0) {
330	$self->{_activity} = $NOW;	424	$self->{_activity} = $NOW;
331		425
332	if ($self->{on_timeout}) {	426	if ($self->{on_timeout}) {
333	$self->{on_timeout}->($self);	427	$self->{on_timeout}($self);
334	} else {	428	} else {
335	$! = Errno::ETIMEDOUT;	429	$self->_error (&Errno::ETIMEDOUT);
336	$self->error;
337	}	430	}
338		431
339	# callbakx could have changed timeout value, optimise	432	# callback could have changed timeout value, optimise
340	return unless $self->{timeout};	433	return unless $self->{timeout};
341		434
342	# calculate new after	435	# calculate new after
343	$after = $self->{timeout};	436	$after = $self->{timeout};
344	}	437	}
345		438
346	Scalar::Util::weaken $self;	439	Scalar::Util::weaken $self;
		440	return unless $self; # ->error could have destroyed $self
347		441
348	$self->{_tw} \|\|= AnyEvent->timer (after => $after, cb => sub {	442	$self->{_tw} \|\|= AnyEvent->timer (after => $after, cb => sub {
349	delete $self->{_tw};	443	delete $self->{_tw};
350	$self->_timeout;	444	$self->_timeout;
351	});	445	});
…		…
414	if $self->{low_water_mark} >= length $self->{wbuf}	508	if $self->{low_water_mark} >= length $self->{wbuf}
415	&& $self->{on_drain};	509	&& $self->{on_drain};
416		510
417	delete $self->{_ww} unless length $self->{wbuf};	511	delete $self->{_ww} unless length $self->{wbuf};
418	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	512	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
419	$self->error;	513	$self->_error ($!, 1);
420	}	514	}
421	};	515	};
422		516
423	# try to write data immediately	517	# try to write data immediately
424	$cb->();	518	$cb->() unless $self->{autocork};
425		519
426	# if still data left in wbuf, we need to poll	520	# if still data left in wbuf, we need to poll
427	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)	521	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)
428	if length $self->{wbuf};	522	if length $self->{wbuf};
429	};	523	};
…		…
444	@_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write")	538	@_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write")
445	->($self, @_);	539	->($self, @_);
446	}	540	}
447		541
448	if ($self->{filter_w}) {	542	if ($self->{filter_w}) {
449	$self->{filter_w}->($self, \$_[0]);	543	$self->{filter_w}($self, \$_[0]);
450	} else {	544	} else {
451	$self->{wbuf} .= $_[0];	545	$self->{wbuf} .= $_[0];
452	$self->_drain_wbuf;	546	$self->_drain_wbuf;
453	}	547	}
454	}	548	}
455		549
456	=item $handle->push_write (type => @args)	550	=item $handle->push_write (type => @args)
457		551
458	=item $handle->unshift_write (type => @args)
459
460	Instead of formatting your data yourself, you can also let this module do	552	Instead of formatting your data yourself, you can also let this module do
461	the job by specifying a type and type-specific arguments.	553	the job by specifying a type and type-specific arguments.
462		554
463	Predefined types are (if you have ideas for additional types, feel free to	555	Predefined types are (if you have ideas for additional types, feel free to
464	drop by and tell us):	556	drop by and tell us):
…		…
468	=item netstring => $string	560	=item netstring => $string
469		561
470	Formats the given value as netstring	562	Formats the given value as netstring
471	(http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them).	563	(http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them).
472		564
473	=back
474
475	=cut	565	=cut
476		566
477	register_write_type netstring => sub {	567	register_write_type netstring => sub {
478	my ($self, $string) = @_;	568	my ($self, $string) = @_;
479		569
480	sprintf "%d:%s,", (length $string), $string	570	sprintf "%d:%s,", (length $string), $string
		571	};
		572
		573	=item packstring => $format, $data
		574
		575	An octet string prefixed with an encoded length. The encoding C<$format>
		576	uses the same format as a Perl C<pack> format, but must specify a single
		577	integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an
		578	optional C<!>, C<< < >> or C<< > >> modifier).
		579
		580	=cut
		581
		582	register_write_type packstring => sub {
		583	my ($self, $format, $string) = @_;
		584
		585	pack "$format/a*", $string
481	};	586	};
482		587
483	=item json => $array_or_hashref	588	=item json => $array_or_hashref
484		589
485	Encodes the given hash or array reference into a JSON object. Unless you	590	Encodes the given hash or array reference into a JSON object. Unless you
…		…
519		624
520	$self->{json} ? $self->{json}->encode ($ref)	625	$self->{json} ? $self->{json}->encode ($ref)
521	: JSON::encode_json ($ref)	626	: JSON::encode_json ($ref)
522	};	627	};
523		628
		629	=item storable => $reference
		630
		631	Freezes the given reference using L<Storable> and writes it to the
		632	handle. Uses the C<nfreeze> format.
		633
		634	=cut
		635
		636	register_write_type storable => sub {
		637	my ($self, $ref) = @_;
		638
		639	require Storable;
		640
		641	pack "w/a*", Storable::nfreeze ($ref)
		642	};
		643
		644	=back
		645
524	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	646	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
525		647
526	This function (not method) lets you add your own types to C<push_write>.	648	This function (not method) lets you add your own types to C<push_write>.
527	Whenever the given C<type> is used, C<push_write> will invoke the code	649	Whenever the given C<type> is used, C<push_write> will invoke the code
528	reference with the handle object and the remaining arguments.	650	reference with the handle object and the remaining arguments.
…		…
548	ways, the "simple" way, using only C<on_read> and the "complex" way, using	670	ways, the "simple" way, using only C<on_read> and the "complex" way, using
549	a queue.	671	a queue.
550		672
551	In the simple case, you just install an C<on_read> callback and whenever	673	In the simple case, you just install an C<on_read> callback and whenever
552	new data arrives, it will be called. You can then remove some data (if	674	new data arrives, it will be called. You can then remove some data (if
553	enough is there) from the read buffer (C<< $handle->rbuf >>) if you want	675	enough is there) from the read buffer (C<< $handle->rbuf >>). Or you cna
554	or not.	676	leave the data there if you want to accumulate more (e.g. when only a
		677	partial message has been received so far).
555		678
556	In the more complex case, you want to queue multiple callbacks. In this	679	In the more complex case, you want to queue multiple callbacks. In this
557	case, AnyEvent::Handle will call the first queued callback each time new	680	case, AnyEvent::Handle will call the first queued callback each time new
558	data arrives and removes it when it has done its job (see C<push_read>,	681	data arrives (also the first time it is queued) and removes it when it has
559	below).	682	done its job (see C<push_read>, below).
560		683
561	This way you can, for example, push three line-reads, followed by reading	684	This way you can, for example, push three line-reads, followed by reading
562	a chunk of data, and AnyEvent::Handle will execute them in order.	685	a chunk of data, and AnyEvent::Handle will execute them in order.
563		686
564	Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by	687	Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by
565	the specified number of bytes which give an XML datagram.	688	the specified number of bytes which give an XML datagram.
566		689
567	# in the default state, expect some header bytes	690	# in the default state, expect some header bytes
568	$handle->on_read (sub {	691	$handle->on_read (sub {
569	# some data is here, now queue the length-header-read (4 octets)	692	# some data is here, now queue the length-header-read (4 octets)
570	shift->unshift_read_chunk (4, sub {	693	shift->unshift_read (chunk => 4, sub {
571	# header arrived, decode	694	# header arrived, decode
572	my $len = unpack "N", $_[1];	695	my $len = unpack "N", $_[1];
573		696
574	# now read the payload	697	# now read the payload
575	shift->unshift_read_chunk ($len, sub {	698	shift->unshift_read (chunk => $len, sub {
576	my $xml = $_[1];	699	my $xml = $_[1];
577	# handle xml	700	# handle xml
578	});	701	});
579	});	702	});
580	});	703	});
581		704
582	Example 2: Implement a client for a protocol that replies either with	705	Example 2: Implement a client for a protocol that replies either with "OK"
583	"OK" and another line or "ERROR" for one request, and 64 bytes for the	706	and another line or "ERROR" for the first request that is sent, and 64
584	second request. Due tot he availability of a full queue, we can just	707	bytes for the second request. Due to the availability of a queue, we can
585	pipeline sending both requests and manipulate the queue as necessary in	708	just pipeline sending both requests and manipulate the queue as necessary
586	the callbacks:	709	in the callbacks.
587		710
588	# request one	711	When the first callback is called and sees an "OK" response, it will
		712	C<unshift> another line-read. This line-read will be queued I<before> the
		713	64-byte chunk callback.
		714
		715	# request one, returns either "OK + extra line" or "ERROR"
589	$handle->push_write ("request 1\015\012");	716	$handle->push_write ("request 1\015\012");
590		717
591	# we expect "ERROR" or "OK" as response, so push a line read	718	# we expect "ERROR" or "OK" as response, so push a line read
592	$handle->push_read_line (sub {	719	$handle->push_read (line => sub {
593	# if we got an "OK", we have to _prepend_ another line,	720	# if we got an "OK", we have to _prepend_ another line,
594	# so it will be read before the second request reads its 64 bytes	721	# so it will be read before the second request reads its 64 bytes
595	# which are already in the queue when this callback is called	722	# which are already in the queue when this callback is called
596	# we don't do this in case we got an error	723	# we don't do this in case we got an error
597	if ($_[1] eq "OK") {	724	if ($_[1] eq "OK") {
598	$_[0]->unshift_read_line (sub {	725	$_[0]->unshift_read (line => sub {
599	my $response = $_[1];	726	my $response = $_[1];
600	...	727	...
601	});	728	});
602	}	729	}
603	});	730	});
604		731
605	# request two	732	# request two, simply returns 64 octets
606	$handle->push_write ("request 2\015\012");	733	$handle->push_write ("request 2\015\012");
607		734
608	# simply read 64 bytes, always	735	# simply read 64 bytes, always
609	$handle->push_read_chunk (64, sub {	736	$handle->push_read (chunk => 64, sub {
610	my $response = $_[1];	737	my $response = $_[1];
611	...	738	...
612	});	739	});
613		740
614	=over 4	741	=over 4
615		742
616	=cut	743	=cut
617		744
618	sub _drain_rbuf {	745	sub _drain_rbuf {
619	my ($self) = @_;	746	my ($self) = @_;
		747
		748	local $self->{_in_drain} = 1;
620		749
621	if (	750	if (
622	defined $self->{rbuf_max}	751	defined $self->{rbuf_max}
623	&& $self->{rbuf_max} < length $self->{rbuf}	752	&& $self->{rbuf_max} < length $self->{rbuf}
624	) {	753	) {
625	$! = &Errno::ENOSPC;	754	$self->_error (&Errno::ENOSPC, 1), return;
626	$self->error;
627	}	755	}
628		756
629	return if $self->{in_drain};	757	while () {
630	local $self->{in_drain} = 1;
631
632	while (my $len = length $self->{rbuf}) {	758	my $len = length $self->{rbuf};
633	no strict 'refs';	759
634	if (my $cb = shift @{ $self->{_queue} }) {	760	if (my $cb = shift @{ $self->{_queue} }) {
635	unless ($cb->($self)) {	761	unless ($cb->($self)) {
636	if ($self->{_eof}) {	762	if ($self->{_eof}) {
637	# no progress can be made (not enough data and no data forthcoming)	763	# no progress can be made (not enough data and no data forthcoming)
638	$! = &Errno::EPIPE;	764	$self->_error (&Errno::EPIPE, 1), return;
639	$self->error;
640	}	765	}
641		766
642	unshift @{ $self->{_queue} }, $cb;	767	unshift @{ $self->{_queue} }, $cb;
643	return;	768	last;
644	}	769	}
645	} elsif ($self->{on_read}) {	770	} elsif ($self->{on_read}) {
		771	last unless $len;
		772
646	$self->{on_read}($self);	773	$self->{on_read}($self);
647		774
648	if (	775	if (
649	$self->{_eof} # if no further data will arrive
650	&& $len == length $self->{rbuf} # and no data has been consumed	776	$len == length $self->{rbuf} # if no data has been consumed
651	&& !@{ $self->{_queue} } # and the queue is still empty	777	&& !@{ $self->{_queue} } # and the queue is still empty
652	&& $self->{on_read} # and we still want to read data	778	&& $self->{on_read} # but we still have on_read
653	) {	779	) {
		780	# no further data will arrive
654	# then no progress can be made	781	# so no progress can be made
655	$! = &Errno::EPIPE;	782	$self->_error (&Errno::EPIPE, 1), return
656	$self->error;	783	if $self->{_eof};
		784
		785	last; # more data might arrive
657	}	786	}
658	} else {	787	} else {
659	# read side becomes idle	788	# read side becomes idle
660	delete $self->{_rw};	789	delete $self->{_rw};
661	return;	790	last;
662	}	791	}
663	}	792	}
664		793
665	if ($self->{_eof}) {	794	if ($self->{_eof}) {
666	$self->_shutdown;	795	if ($self->{on_eof}) {
667	$self->{on_eof}($self)	796	$self->{on_eof}($self)
668	if $self->{on_eof};	797	} else {
		798	$self->_error (0, 1);
		799	}
		800	}
		801
		802	# may need to restart read watcher
		803	unless ($self->{_rw}) {
		804	$self->start_read
		805	if $self->{on_read} \|\| @{ $self->{_queue} };
669	}	806	}
670	}	807	}
671		808
672	=item $handle->on_read ($cb)	809	=item $handle->on_read ($cb)
673		810
…		…
679		816
680	sub on_read {	817	sub on_read {
681	my ($self, $cb) = @_;	818	my ($self, $cb) = @_;
682		819
683	$self->{on_read} = $cb;	820	$self->{on_read} = $cb;
		821	$self->_drain_rbuf if $cb && !$self->{_in_drain};
684	}	822	}
685		823
686	=item $handle->rbuf	824	=item $handle->rbuf
687		825
688	Returns the read buffer (as a modifiable lvalue).	826	Returns the read buffer (as a modifiable lvalue).
…		…
737	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	875	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
738	->($self, $cb, @_);	876	->($self, $cb, @_);
739	}	877	}
740		878
741	push @{ $self->{_queue} }, $cb;	879	push @{ $self->{_queue} }, $cb;
742	$self->_drain_rbuf;	880	$self->_drain_rbuf unless $self->{_in_drain};
743	}	881	}
744		882
745	sub unshift_read {	883	sub unshift_read {
746	my $self = shift;	884	my $self = shift;
747	my $cb = pop;	885	my $cb = pop;
…		…
753	->($self, $cb, @_);	891	->($self, $cb, @_);
754	}	892	}
755		893
756		894
757	unshift @{ $self->{_queue} }, $cb;	895	unshift @{ $self->{_queue} }, $cb;
758	$self->_drain_rbuf;	896	$self->_drain_rbuf unless $self->{_in_drain};
759	}	897	}
760		898
761	=item $handle->push_read (type => @args, $cb)	899	=item $handle->push_read (type => @args, $cb)
762		900
763	=item $handle->unshift_read (type => @args, $cb)	901	=item $handle->unshift_read (type => @args, $cb)
…		…
793	$cb->($_[0], substr $_[0]{rbuf}, 0, $len, "");	931	$cb->($_[0], substr $_[0]{rbuf}, 0, $len, "");
794	1	932	1
795	}	933	}
796	};	934	};
797		935
798	# compatibility with older API
799	sub push_read_chunk {
800	$_[0]->push_read (chunk => $_[1], $_[2]);
801	}
802
803	sub unshift_read_chunk {
804	$_[0]->unshift_read (chunk => $_[1], $_[2]);
805	}
806
807	=item line => [$eol, ]$cb->($handle, $line, $eol)	936	=item line => [$eol, ]$cb->($handle, $line, $eol)
808		937
809	The callback will be called only once a full line (including the end of	938	The callback will be called only once a full line (including the end of
810	line marker, C<$eol>) has been read. This line (excluding the end of line	939	line marker, C<$eol>) has been read. This line (excluding the end of line
811	marker) will be passed to the callback as second argument (C<$line>), and	940	marker) will be passed to the callback as second argument (C<$line>), and
…		…
826	=cut	955	=cut
827		956
828	register_read_type line => sub {	957	register_read_type line => sub {
829	my ($self, $cb, $eol) = @_;	958	my ($self, $cb, $eol) = @_;
830		959
831	$eol = qr\|(\015?\012)\| if @_ < 3;	960	if (@_ < 3) {
832	$eol = quotemeta $eol unless ref $eol;	961	# this is more than twice as fast as the generic code below
833	$eol = qr\|^(.*?)($eol)\|s;
834
835	sub {	962	sub {
836	$_[0]{rbuf} =~ s/$eol// or return;	963	$_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return;
837		964
838	$cb->($_[0], $1, $2);	965	$cb->($_[0], $1, $2);
839	1
840	}
841	};
842
843	# compatibility with older API
844	sub push_read_line {
845	my $self = shift;
846	$self->push_read (line => @_);
847	}
848
849	sub unshift_read_line {
850	my $self = shift;
851	$self->unshift_read (line => @_);
852	}
853
854	=item netstring => $cb->($handle, $string)
855
856	A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement).
857
858	Throws an error with C<$!> set to EBADMSG on format violations.
859
860	=cut
861
862	register_read_type netstring => sub {
863	my ($self, $cb) = @_;
864
865	sub {
866	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {
867	if ($_[0]{rbuf} =~ /[^0-9]/) {
868	$! = &Errno::EBADMSG;
869	$self->error;
870	}	966	1
871	return;
872	}	967	}
		968	} else {
		969	$eol = quotemeta $eol unless ref $eol;
		970	$eol = qr\|^(.*?)($eol)\|s;
873		971
874	my $len = $1;	972	sub {
		973	$_[0]{rbuf} =~ s/$eol// or return;
875		974
876	$self->unshift_read (chunk => $len, sub {	975	$cb->($_[0], $1, $2);
877	my $string = $_[1];
878	$_[0]->unshift_read (chunk => 1, sub {
879	if ($_[1] eq ",") {
880	$cb->($_[0], $string);
881	} else {
882	$! = &Errno::EBADMSG;
883	$self->error;
884	}
885	});	976	1
886	});	977	}
887
888	1
889	}	978	}
890	};	979	};
891		980
892	=item regex => $accept[, $reject[, $skip], $cb->($handle, $data)	981	=item regex => $accept[, $reject[, $skip], $cb->($handle, $data)
893		982
…		…
945	return 1;	1034	return 1;
946	}	1035	}
947		1036
948	# reject	1037	# reject
949	if ($reject && $$rbuf =~ $reject) {	1038	if ($reject && $$rbuf =~ $reject) {
950	$! = &Errno::EBADMSG;	1039	$self->_error (&Errno::EBADMSG);
951	$self->error;
952	}	1040	}
953		1041
954	# skip	1042	# skip
955	if ($skip && $$rbuf =~ $skip) {	1043	if ($skip && $$rbuf =~ $skip) {
956	$data .= substr $$rbuf, 0, $+[0], "";	1044	$data .= substr $$rbuf, 0, $+[0], "";
…		…
958		1046
959	()	1047	()
960	}	1048	}
961	};	1049	};
962		1050
		1051	=item netstring => $cb->($handle, $string)
		1052
		1053	A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement).
		1054
		1055	Throws an error with C<$!> set to EBADMSG on format violations.
		1056
		1057	=cut
		1058
		1059	register_read_type netstring => sub {
		1060	my ($self, $cb) = @_;
		1061
		1062	sub {
		1063	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {
		1064	if ($_[0]{rbuf} =~ /[^0-9]/) {
		1065	$self->_error (&Errno::EBADMSG);
		1066	}
		1067	return;
		1068	}
		1069
		1070	my $len = $1;
		1071
		1072	$self->unshift_read (chunk => $len, sub {
		1073	my $string = $_[1];
		1074	$_[0]->unshift_read (chunk => 1, sub {
		1075	if ($_[1] eq ",") {
		1076	$cb->($_[0], $string);
		1077	} else {
		1078	$self->_error (&Errno::EBADMSG);
		1079	}
		1080	});
		1081	});
		1082
		1083	1
		1084	}
		1085	};
		1086
		1087	=item packstring => $format, $cb->($handle, $string)
		1088
		1089	An octet string prefixed with an encoded length. The encoding C<$format>
		1090	uses the same format as a Perl C<pack> format, but must specify a single
		1091	integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an
		1092	optional C<!>, C<< < >> or C<< > >> modifier).
		1093
		1094	DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>.
		1095
		1096	Example: read a block of data prefixed by its length in BER-encoded
		1097	format (very efficient).
		1098
		1099	$handle->push_read (packstring => "w", sub {
		1100	my ($handle, $data) = @_;
		1101	});
		1102
		1103	=cut
		1104
		1105	register_read_type packstring => sub {
		1106	my ($self, $cb, $format) = @_;
		1107
		1108	sub {
		1109	# when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method
		1110	defined (my $len = eval { unpack $format, $_[0]{rbuf} })
		1111	or return;
		1112
		1113	$format = length pack $format, $len;
		1114
		1115	# bypass unshift if we already have the remaining chunk
		1116	if ($format + $len <= length $_[0]{rbuf}) {
		1117	my $data = substr $_[0]{rbuf}, $format, $len;
		1118	substr $_[0]{rbuf}, 0, $format + $len, "";
		1119	$cb->($_[0], $data);
		1120	} else {
		1121	# remove prefix
		1122	substr $_[0]{rbuf}, 0, $format, "";
		1123
		1124	# read remaining chunk
		1125	$_[0]->unshift_read (chunk => $len, $cb);
		1126	}
		1127
		1128	1
		1129	}
		1130	};
		1131
963	=item json => $cb->($handle, $hash_or_arrayref)	1132	=item json => $cb->($handle, $hash_or_arrayref)
964		1133
965	Reads a JSON object or array, decodes it and passes it to the callback.	1134	Reads a JSON object or array, decodes it and passes it to the callback.
966		1135
967	If a C<json> object was passed to the constructor, then that will be used	1136	If a C<json> object was passed to the constructor, then that will be used
…		…
977	the C<json> write type description, above, for an actual example.	1146	the C<json> write type description, above, for an actual example.
978		1147
979	=cut	1148	=cut
980		1149
981	register_read_type json => sub {	1150	register_read_type json => sub {
982	my ($self, $cb, $accept, $reject, $skip) = @_;	1151	my ($self, $cb) = @_;
983		1152
984	require JSON;	1153	require JSON;
985		1154
986	my $data;	1155	my $data;
987	my $rbuf = \$self->{rbuf};	1156	my $rbuf = \$self->{rbuf};
…		…
1002	()	1171	()
1003	}	1172	}
1004	}	1173	}
1005	};	1174	};
1006		1175
		1176	=item storable => $cb->($handle, $ref)
		1177
		1178	Deserialises a L<Storable> frozen representation as written by the
		1179	C<storable> write type (BER-encoded length prefix followed by nfreeze'd
		1180	data).
		1181
		1182	Raises C<EBADMSG> error if the data could not be decoded.
		1183
		1184	=cut
		1185
		1186	register_read_type storable => sub {
		1187	my ($self, $cb) = @_;
		1188
		1189	require Storable;
		1190
		1191	sub {
		1192	# when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method
		1193	defined (my $len = eval { unpack "w", $_[0]{rbuf} })
		1194	or return;
		1195
		1196	my $format = length pack "w", $len;
		1197
		1198	# bypass unshift if we already have the remaining chunk
		1199	if ($format + $len <= length $_[0]{rbuf}) {
		1200	my $data = substr $_[0]{rbuf}, $format, $len;
		1201	substr $_[0]{rbuf}, 0, $format + $len, "";
		1202	$cb->($_[0], Storable::thaw ($data));
		1203	} else {
		1204	# remove prefix
		1205	substr $_[0]{rbuf}, 0, $format, "";
		1206
		1207	# read remaining chunk
		1208	$_[0]->unshift_read (chunk => $len, sub {
		1209	if (my $ref = eval { Storable::thaw ($_[1]) }) {
		1210	$cb->($_[0], $ref);
		1211	} else {
		1212	$self->_error (&Errno::EBADMSG);
		1213	}
		1214	});
		1215	}
		1216
		1217	1
		1218	}
		1219	};
		1220
1007	=back	1221	=back
1008		1222
1009	=item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args)	1223	=item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args)
1010		1224
1011	This function (not method) lets you add your own types to C<push_read>.	1225	This function (not method) lets you add your own types to C<push_read>.
…		…
1029	=item $handle->stop_read	1243	=item $handle->stop_read
1030		1244
1031	=item $handle->start_read	1245	=item $handle->start_read
1032		1246
1033	In rare cases you actually do not want to read anything from the	1247	In rare cases you actually do not want to read anything from the
1034	socket. In this case you can call C<stop_read>. Neither C<on_read> no	1248	socket. In this case you can call C<stop_read>. Neither C<on_read> nor
1035	any queued callbacks will be executed then. To start reading again, call	1249	any queued callbacks will be executed then. To start reading again, call
1036	C<start_read>.	1250	C<start_read>.
		1251
		1252	Note that AnyEvent::Handle will automatically C<start_read> for you when
		1253	you change the C<on_read> callback or push/unshift a read callback, and it
		1254	will automatically C<stop_read> for you when neither C<on_read> is set nor
		1255	there are any read requests in the queue.
1037		1256
1038	=cut	1257	=cut
1039		1258
1040	sub stop_read {	1259	sub stop_read {
1041	my ($self) = @_;	1260	my ($self) = @_;
…		…
1055		1274
1056	if ($len > 0) {	1275	if ($len > 0) {
1057	$self->{_activity} = AnyEvent->now;	1276	$self->{_activity} = AnyEvent->now;
1058		1277
1059	$self->{filter_r}	1278	$self->{filter_r}
1060	? $self->{filter_r}->($self, $rbuf)	1279	? $self->{filter_r}($self, $rbuf)
1061	: $self->_drain_rbuf;	1280	: $self->{_in_drain} \|\| $self->_drain_rbuf;
1062		1281
1063	} elsif (defined $len) {	1282	} elsif (defined $len) {
1064	delete $self->{_rw};	1283	delete $self->{_rw};
1065	delete $self->{_ww};
1066	delete $self->{_tw};
1067	$self->{_eof} = 1;	1284	$self->{_eof} = 1;
1068	$self->_drain_rbuf;	1285	$self->_drain_rbuf unless $self->{_in_drain};
1069		1286
1070	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	1287	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
1071	return $self->error;	1288	return $self->_error ($!, 1);
1072	}	1289	}
1073	});	1290	});
1074	}	1291	}
1075	}	1292	}
1076		1293
1077	sub _dotls {	1294	sub _dotls {
1078	my ($self) = @_;	1295	my ($self) = @_;
		1296
		1297	my $buf;
1079		1298
1080	if (length $self->{_tls_wbuf}) {	1299	if (length $self->{_tls_wbuf}) {
1081	while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {	1300	while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
1082	substr $self->{_tls_wbuf}, 0, $len, "";	1301	substr $self->{_tls_wbuf}, 0, $len, "";
1083	}	1302	}
1084	}	1303	}
1085		1304
1086	if (defined (my $buf = Net::SSLeay::BIO_read ($self->{_wbio}))) {	1305	if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) {
1087	$self->{wbuf} .= $buf;	1306	$self->{wbuf} .= $buf;
1088	$self->_drain_wbuf;	1307	$self->_drain_wbuf;
1089	}	1308	}
1090		1309
1091	while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) {	1310	while (defined ($buf = Net::SSLeay::read ($self->{tls}))) {
		1311	if (length $buf) {
1092	$self->{rbuf} .= $buf;	1312	$self->{rbuf} .= $buf;
1093	$self->_drain_rbuf;	1313	$self->_drain_rbuf unless $self->{_in_drain};
		1314	} else {
		1315	# let's treat SSL-eof as we treat normal EOF
		1316	$self->{_eof} = 1;
		1317	$self->_shutdown;
		1318	return;
		1319	}
1094	}	1320	}
1095		1321
1096	my $err = Net::SSLeay::get_error ($self->{tls}, -1);	1322	my $err = Net::SSLeay::get_error ($self->{tls}, -1);
1097		1323
1098	if ($err!= Net::SSLeay::ERROR_WANT_READ ()) {	1324	if ($err!= Net::SSLeay::ERROR_WANT_READ ()) {
1099	if ($err == Net::SSLeay::ERROR_SYSCALL ()) {	1325	if ($err == Net::SSLeay::ERROR_SYSCALL ()) {
1100	$self->error;	1326	return $self->_error ($!, 1);
1101	} elsif ($err == Net::SSLeay::ERROR_SSL ()) {	1327	} elsif ($err == Net::SSLeay::ERROR_SSL ()) {
1102	$! = &Errno::EIO;	1328	return $self->_error (&Errno::EIO, 1);
1103	$self->error;
1104	}	1329	}
1105		1330
1106	# all others are fine for our purposes	1331	# all others are fine for our purposes
1107	}	1332	}
1108	}	1333	}
…		…
1123	call and can be used or changed to your liking. Note that the handshake	1348	call and can be used or changed to your liking. Note that the handshake
1124	might have already started when this function returns.	1349	might have already started when this function returns.
1125		1350
1126	=cut	1351	=cut
1127		1352
1128	# TODO: maybe document...
1129	sub starttls {	1353	sub starttls {
1130	my ($self, $ssl, $ctx) = @_;	1354	my ($self, $ssl, $ctx) = @_;
1131		1355
1132	$self->stoptls;	1356	$self->stoptls;
1133		1357
…		…
1144	# basically, this is deep magic (because SSL_read should have the same issues)	1368	# basically, this is deep magic (because SSL_read should have the same issues)
1145	# but the openssl maintainers basically said: "trust us, it just works".	1369	# but the openssl maintainers basically said: "trust us, it just works".
1146	# (unfortunately, we have to hardcode constants because the abysmally misdesigned	1370	# (unfortunately, we have to hardcode constants because the abysmally misdesigned
1147	# and mismaintained ssleay-module doesn't even offer them).	1371	# and mismaintained ssleay-module doesn't even offer them).
1148	# http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html	1372	# http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html
		1373	#
		1374	# in short: this is a mess.
		1375	#
		1376	# note that we do not try to kepe the length constant between writes as we are required to do.
		1377	# we assume that most (but not all) of this insanity only applies to non-blocking cases,
		1378	# and we drive openssl fully in blocking mode here.
1149	Net::SSLeay::CTX_set_mode ($self->{tls},	1379	Net::SSLeay::CTX_set_mode ($self->{tls},
1150	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)	1380	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)
1151	\| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));	1381	\| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));
1152		1382
1153	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1383	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
…		…
1186		1416
1187	sub DESTROY {	1417	sub DESTROY {
1188	my $self = shift;	1418	my $self = shift;
1189		1419
1190	$self->stoptls;	1420	$self->stoptls;
		1421
		1422	my $linger = exists $self->{linger} ? $self->{linger} : 3600;
		1423
		1424	if ($linger && length $self->{wbuf}) {
		1425	my $fh = delete $self->{fh};
		1426	my $wbuf = delete $self->{wbuf};
		1427
		1428	my @linger;
		1429
		1430	push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub {
		1431	my $len = syswrite $fh, $wbuf, length $wbuf;
		1432
		1433	if ($len > 0) {
		1434	substr $wbuf, 0, $len, "";
		1435	} else {
		1436	@linger = (); # end
		1437	}
		1438	});
		1439	push @linger, AnyEvent->timer (after => $linger, cb => sub {
		1440	@linger = ();
		1441	});
		1442	}
1191	}	1443	}
1192		1444
1193	=item AnyEvent::Handle::TLS_CTX	1445	=item AnyEvent::Handle::TLS_CTX
1194		1446
1195	This function creates and returns the Net::SSLeay::CTX object used by	1447	This function creates and returns the Net::SSLeay::CTX object used by
…		…
1237	=over 4	1489	=over 4
1238		1490
1239	=item * all constructor arguments become object members.	1491	=item * all constructor arguments become object members.
1240		1492
1241	At least initially, when you pass a C<tls>-argument to the constructor it	1493	At least initially, when you pass a C<tls>-argument to the constructor it
1242	will end up in C<< $handle->{tls} >>. Those members might be changes or	1494	will end up in C<< $handle->{tls} >>. Those members might be changed or
1243	mutated later on (for example C<tls> will hold the TLS connection object).	1495	mutated later on (for example C<tls> will hold the TLS connection object).
1244		1496
1245	=item * other object member names are prefixed with an C<_>.	1497	=item * other object member names are prefixed with an C<_>.
1246		1498
1247	All object members not explicitly documented (internal use) are prefixed	1499	All object members not explicitly documented (internal use) are prefixed

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.44 by root, Thu May 29 00:00:07 2008 UTC vs. Revision 1.87 by root, Thu Aug 21 20:52:39 2008 UTC

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.44 by root, Thu May 29 00:00:07 2008 UTC vs.
Revision 1.87 by root, Thu Aug 21 20:52:39 2008 UTC