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

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.161 by root, Sat Jul 25 06:16:45 2009 UTC vs.
Revision 1.202 by root, Sat Oct 16 02:01:54 2010 UTC

…		…
1	package AnyEvent::Handle;
2
3	use Scalar::Util ();
4	use Carp ();
5	use Errno qw(EAGAIN EINTR);
6
7	use AnyEvent (); BEGIN { AnyEvent::common_sense }
8	use AnyEvent::Util qw(WSAEWOULDBLOCK);
9
10	=head1 NAME	1	=head1 NAME
11		2
12	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent	3	AnyEvent::Handle - non-blocking I/O on streaming handles via AnyEvent
13
14	=cut
15
16	our $VERSION = 4.86;
17		4
18	=head1 SYNOPSIS	5	=head1 SYNOPSIS
19		6
20	use AnyEvent;	7	use AnyEvent;
21	use AnyEvent::Handle;	8	use AnyEvent::Handle;
27	on_error => sub {	14	on_error => sub {
28	my ($hdl, $fatal, $msg) = @_;	15	my ($hdl, $fatal, $msg) = @_;
29	warn "got error $msg\n";	16	warn "got error $msg\n";
30	$hdl->destroy;	17	$hdl->destroy;
31	$cv->send;	18	$cv->send;
32	);	19	};
33		20
34	# send some request line	21	# send some request line
35	$hdl->push_write ("getinfo\015\012");	22	$hdl->push_write ("getinfo\015\012");
36		23
37	# read the response line	24	# read the response line
…		…
43		30
44	$cv->recv;	31	$cv->recv;
45		32
46	=head1 DESCRIPTION	33	=head1 DESCRIPTION
47		34
48	This module is a helper module to make it easier to do event-based I/O on	35	This is a helper module to make it easier to do event-based I/O on
49	filehandles.	36	stream-based filehandles (sockets, pipes, and other stream things).
50		37
51	The L<AnyEvent::Intro> tutorial contains some well-documented	38	The L<AnyEvent::Intro> tutorial contains some well-documented
52	AnyEvent::Handle examples.	39	AnyEvent::Handle examples.
53		40
54	In the following, when the documentation refers to of "bytes" then this	41	In the following, where the documentation refers to "bytes", it means
55	means characters. As sysread and syswrite are used for all I/O, their	42	characters. As sysread and syswrite are used for all I/O, their
56	treatment of characters applies to this module as well.	43	treatment of characters applies to this module as well.
57		44
58	At the very minimum, you should specify C<fh> or C<connect>, and the	45	At the very minimum, you should specify C<fh> or C<connect>, and the
59	C<on_error> callback.	46	C<on_error> callback.
60		47
61	All callbacks will be invoked with the handle object as their first	48	All callbacks will be invoked with the handle object as their first
62	argument.	49	argument.
63		50
		51	=cut
		52
		53	package AnyEvent::Handle;
		54
		55	use Scalar::Util ();
		56	use List::Util ();
		57	use Carp ();
		58	use Errno qw(EAGAIN EINTR);
		59
		60	use AnyEvent (); BEGIN { AnyEvent::common_sense }
		61	use AnyEvent::Util qw(WSAEWOULDBLOCK);
		62
		63	our $VERSION = $AnyEvent::VERSION;
		64
		65	sub _load_func($) {
		66	my $func = $_[0];
		67
		68	unless (defined &$func) {
		69	my $pkg = $func;
		70	do {
		71	$pkg =~ s/::[^:]+$//
		72	or return;
		73	eval "require $pkg";
		74	} until defined &$func;
		75	}
		76
		77	\&$func
		78	}
		79
64	=head1 METHODS	80	=head1 METHODS
65		81
66	=over 4	82	=over 4
67		83
68	=item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value...	84	=item $handle = B<new> AnyEvent::Handle fh => $filehandle, key => value...
69		85
70	The constructor supports these arguments (all as C<< key => value >> pairs).	86	The constructor supports these arguments (all as C<< key => value >> pairs).
71		87
72	=over 4	88	=over 4
73		89
…		…
102	prepare the file handle with parameters required for the actual connect	118	prepare the file handle with parameters required for the actual connect
103	(as opposed to settings that can be changed when the connection is already	119	(as opposed to settings that can be changed when the connection is already
104	established).	120	established).
105		121
106	The return value of this callback should be the connect timeout value in	122	The return value of this callback should be the connect timeout value in
107	seconds (or C<0>, or C<undef>, or the empty list, to indicate the default	123	seconds (or C<0>, or C<undef>, or the empty list, to indicate that the
108	timeout is to be used).	124	default timeout is to be used).
109		125
110	=item on_connect => $cb->($handle, $host, $port, $retry->())	126	=item on_connect => $cb->($handle, $host, $port, $retry->())
111		127
112	This callback is called when a connection has been successfully established.	128	This callback is called when a connection has been successfully established.
113		129
114	The actual numeric host and port (the socket peername) are passed as	130	The peer's numeric host and port (the socket peername) are passed as
115	parameters, together with a retry callback.	131	parameters, together with a retry callback.
116		132
117	When, for some reason, the handle is not acceptable, then calling	133	If, for some reason, the handle is not acceptable, calling C<$retry>
118	C<$retry> will continue with the next conenction target (in case of	134	will continue with the next connection target (in case of multi-homed
119	multi-homed hosts or SRV records there can be multiple connection	135	hosts or SRV records there can be multiple connection endpoints). At the
120	endpoints). When it is called then the read and write queues, eof status,	136	time it is called the read and write queues, eof status, tls status and
121	tls status and similar properties of the handle are being reset.	137	similar properties of the handle will have been reset.
122		138
123	In most cases, ignoring the C<$retry> parameter is the way to go.	139	In most cases, you should ignore the C<$retry> parameter.
124		140
125	=item on_connect_error => $cb->($handle, $message)	141	=item on_connect_error => $cb->($handle, $message)
126		142
127	This callback is called when the conenction could not be	143	This callback is called when the connection could not be
128	established. C<$!> will contain the relevant error code, and C<$message> a	144	established. C<$!> will contain the relevant error code, and C<$message> a
129	message describing it (usually the same as C<"$!">).	145	message describing it (usually the same as C<"$!">).
130		146
131	If this callback isn't specified, then C<on_error> will be called with a	147	If this callback isn't specified, then C<on_error> will be called with a
132	fatal error instead.	148	fatal error instead.
…		…
135		151
136	=item on_error => $cb->($handle, $fatal, $message)	152	=item on_error => $cb->($handle, $fatal, $message)
137		153
138	This is the error callback, which is called when, well, some error	154	This is the error callback, which is called when, well, some error
139	occured, such as not being able to resolve the hostname, failure to	155	occured, such as not being able to resolve the hostname, failure to
140	connect or a read error.	156	connect, or a read error.
141		157
142	Some errors are fatal (which is indicated by C<$fatal> being true). On	158	Some errors are fatal (which is indicated by C<$fatal> being true). On
143	fatal errors the handle object will be destroyed (by a call to C<< ->	159	fatal errors the handle object will be destroyed (by a call to C<< ->
144	destroy >>) after invoking the error callback (which means you are free to	160	destroy >>) after invoking the error callback (which means you are free to
145	examine the handle object). Examples of fatal errors are an EOF condition	161	examine the handle object). Examples of fatal errors are an EOF condition
146	with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. In	162	with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. In
147	cases where the other side can close the connection at their will it is	163	cases where the other side can close the connection at will, it is
148	often easiest to not report C<EPIPE> errors in this callback.	164	often easiest to not report C<EPIPE> errors in this callback.
149		165
150	AnyEvent::Handle tries to find an appropriate error code for you to check	166	AnyEvent::Handle tries to find an appropriate error code for you to check
151	against, but in some cases (TLS errors), this does not work well. It is	167	against, but in some cases (TLS errors), this does not work well. It is
152	recommended to always output the C<$message> argument in human-readable	168	recommended to always output the C<$message> argument in human-readable
153	error messages (it's usually the same as C<"$!">).	169	error messages (it's usually the same as C<"$!">).
154		170
155	Non-fatal errors can be retried by simply returning, but it is recommended	171	Non-fatal errors can be retried by returning, but it is recommended
156	to simply ignore this parameter and instead abondon the handle object	172	to simply ignore this parameter and instead abondon the handle object
157	when this callback is invoked. Examples of non-fatal errors are timeouts	173	when this callback is invoked. Examples of non-fatal errors are timeouts
158	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).	174	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
159		175
160	On callback entrance, the value of C<$!> contains the operating system	176	On entry to the callback, the value of C<$!> contains the operating
161	error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or	177	system error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or
162	C<EPROTO>).	178	C<EPROTO>).
163		179
164	While not mandatory, it is I<highly> recommended to set this callback, as	180	While not mandatory, it is I<highly> recommended to set this callback, as
165	you will not be notified of errors otherwise. The default simply calls	181	you will not be notified of errors otherwise. The default just calls
166	C<croak>.	182	C<croak>.
167		183
168	=item on_read => $cb->($handle)	184	=item on_read => $cb->($handle)
169		185
170	This sets the default read callback, which is called when data arrives	186	This sets the default read callback, which is called when data arrives
…		…
175	To access (and remove data from) the read buffer, use the C<< ->rbuf >>	191	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
176	method or access the C<< $handle->{rbuf} >> member directly. Note that you	192	method or access the C<< $handle->{rbuf} >> member directly. Note that you
177	must not enlarge or modify the read buffer, you can only remove data at	193	must not enlarge or modify the read buffer, you can only remove data at
178	the beginning from it.	194	the beginning from it.
179		195
		196	You can also call C<< ->push_read (...) >> or any other function that
		197	modifies the read queue. Or do both. Or ...
		198
180	When an EOF condition is detected then AnyEvent::Handle will first try to	199	When an EOF condition is detected, AnyEvent::Handle will first try to
181	feed all the remaining data to the queued callbacks and C<on_read> before	200	feed all the remaining data to the queued callbacks and C<on_read> before
182	calling the C<on_eof> callback. If no progress can be made, then a fatal	201	calling the C<on_eof> callback. If no progress can be made, then a fatal
183	error will be raised (with C<$!> set to C<EPIPE>).	202	error will be raised (with C<$!> set to C<EPIPE>).
184		203
185	Note that, unlike requests in the read queue, an C<on_read> callback	204	Note that, unlike requests in the read queue, an C<on_read> callback
…		…
204	set, then a fatal error will be raised with C<$!> set to <0>.	223	set, then a fatal error will be raised with C<$!> set to <0>.
205		224
206	=item on_drain => $cb->($handle)	225	=item on_drain => $cb->($handle)
207		226
208	This sets the callback that is called when the write buffer becomes empty	227	This sets the callback that is called when the write buffer becomes empty
209	(or when the callback is set and the buffer is empty already).	228	(or immediately if the buffer is empty already).
210		229
211	To append to the write buffer, use the C<< ->push_write >> method.	230	To append to the write buffer, use the C<< ->push_write >> method.
212		231
213	This callback is useful when you don't want to put all of your write data	232	This callback is useful when you don't want to put all of your write data
214	into the queue at once, for example, when you want to write the contents	233	into the queue at once, for example, when you want to write the contents
…		…
216	memory and push it into the queue, but instead only read more data from	235	memory and push it into the queue, but instead only read more data from
217	the file when the write queue becomes empty.	236	the file when the write queue becomes empty.
218		237
219	=item timeout => $fractional_seconds	238	=item timeout => $fractional_seconds
220		239
		240	=item rtimeout => $fractional_seconds
		241
		242	=item wtimeout => $fractional_seconds
		243
221	If non-zero, then this enables an "inactivity" timeout: whenever this many	244	If non-zero, then these enables an "inactivity" timeout: whenever this
222	seconds pass without a successful read or write on the underlying file	245	many seconds pass without a successful read or write on the underlying
223	handle, the C<on_timeout> callback will be invoked (and if that one is	246	file handle (or a call to C<timeout_reset>), the C<on_timeout> callback
224	missing, a non-fatal C<ETIMEDOUT> error will be raised).	247	will be invoked (and if that one is missing, a non-fatal C<ETIMEDOUT>
		248	error will be raised).
225		249
		250	There are three variants of the timeouts that work independently
		251	of each other, for both read and write, just read, and just write:
		252	C<timeout>, C<rtimeout> and C<wtimeout>, with corresponding callbacks
		253	C<on_timeout>, C<on_rtimeout> and C<on_wtimeout>, and reset functions
		254	C<timeout_reset>, C<rtimeout_reset>, and C<wtimeout_reset>.
		255
226	Note that timeout processing is also active when you currently do not have	256	Note that timeout processing is active even when you do not have
227	any outstanding read or write requests: If you plan to keep the connection	257	any outstanding read or write requests: If you plan to keep the connection
228	idle then you should disable the timout temporarily or ignore the timeout	258	idle then you should disable the timeout temporarily or ignore the timeout
229	in the C<on_timeout> callback, in which case AnyEvent::Handle will simply	259	in the C<on_timeout> callback, in which case AnyEvent::Handle will simply
230	restart the timeout.	260	restart the timeout.
231		261
232	Zero (the default) disables this timeout.	262	Zero (the default) disables this timeout.
233		263
…		…
249	amount of data without a callback ever being called as long as the line	279	amount of data without a callback ever being called as long as the line
250	isn't finished).	280	isn't finished).
251		281
252	=item autocork => <boolean>	282	=item autocork => <boolean>
253		283
254	When disabled (the default), then C<push_write> will try to immediately	284	When disabled (the default), C<push_write> will try to immediately
255	write the data to the handle, if possible. This avoids having to register	285	write the data to the handle if possible. This avoids having to register
256	a write watcher and wait for the next event loop iteration, but can	286	a write watcher and wait for the next event loop iteration, but can
257	be inefficient if you write multiple small chunks (on the wire, this	287	be inefficient if you write multiple small chunks (on the wire, this
258	disadvantage is usually avoided by your kernel's nagle algorithm, see	288	disadvantage is usually avoided by your kernel's nagle algorithm, see
259	C<no_delay>, but this option can save costly syscalls).	289	C<no_delay>, but this option can save costly syscalls).
260		290
261	When enabled, then writes will always be queued till the next event loop	291	When enabled, writes will always be queued till the next event loop
262	iteration. This is efficient when you do many small writes per iteration,	292	iteration. This is efficient when you do many small writes per iteration,
263	but less efficient when you do a single write only per iteration (or when	293	but less efficient when you do a single write only per iteration (or when
264	the write buffer often is full). It also increases write latency.	294	the write buffer often is full). It also increases write latency.
265		295
266	=item no_delay => <boolean>	296	=item no_delay => <boolean>
…		…
270	the Nagle algorithm, and usually it is beneficial.	300	the Nagle algorithm, and usually it is beneficial.
271		301
272	In some situations you want as low a delay as possible, which can be	302	In some situations you want as low a delay as possible, which can be
273	accomplishd by setting this option to a true value.	303	accomplishd by setting this option to a true value.
274		304
275	The default is your opertaing system's default behaviour (most likely	305	The default is your operating system's default behaviour (most likely
276	enabled), this option explicitly enables or disables it, if possible.	306	enabled). This option explicitly enables or disables it, if possible.
		307
		308	=item keepalive => <boolean>
		309
		310	Enables (default disable) the SO_KEEPALIVE option on the stream socket:
		311	normally, TCP connections have no time-out once established, so TCP
		312	connections, once established, can stay alive forever even when the other
		313	side has long gone. TCP keepalives are a cheap way to take down long-lived
		314	TCP connections when the other side becomes unreachable. While the default
		315	is OS-dependent, TCP keepalives usually kick in after around two hours,
		316	and, if the other side doesn't reply, take down the TCP connection some 10
		317	to 15 minutes later.
		318
		319	It is harmless to specify this option for file handles that do not support
		320	keepalives, and enabling it on connections that are potentially long-lived
		321	is usually a good idea.
		322
		323	=item oobinline => <boolean>
		324
		325	BSD majorly fucked up the implementation of TCP urgent data. The result
		326	is that almost no OS implements TCP according to the specs, and every OS
		327	implements it slightly differently.
		328
		329	If you want to handle TCP urgent data, then setting this flag (the default
		330	is enabled) gives you the most portable way of getting urgent data, by
		331	putting it into the stream.
		332
		333	Since BSD emulation of OOB data on top of TCP's urgent data can have
		334	security implications, AnyEvent::Handle sets this flag automatically
		335	unless explicitly specified. Note that setting this flag after
		336	establishing a connection I<may> be a bit too late (data loss could
		337	already have occured on BSD systems), but at least it will protect you
		338	from most attacks.
277		339
278	=item read_size => <bytes>	340	=item read_size => <bytes>
279		341
280	The default read block size (the amount of bytes this module will	342	The default read block size (the number of bytes this module will
281	try to read during each loop iteration, which affects memory	343	try to read during each loop iteration, which affects memory
282	requirements). Default: C<8192>.	344	requirements). Default: C<8192>.
283		345
284	=item low_water_mark => <bytes>	346	=item low_water_mark => <bytes>
285		347
286	Sets the amount of bytes (default: C<0>) that make up an "empty" write	348	Sets the number of bytes (default: C<0>) that make up an "empty" write
287	buffer: If the write reaches this size or gets even samller it is	349	buffer: If the buffer reaches this size or gets even samller it is
288	considered empty.	350	considered empty.
289		351
290	Sometimes it can be beneficial (for performance reasons) to add data to	352	Sometimes it can be beneficial (for performance reasons) to add data to
291	the write buffer before it is fully drained, but this is a rare case, as	353	the write buffer before it is fully drained, but this is a rare case, as
292	the operating system kernel usually buffers data as well, so the default	354	the operating system kernel usually buffers data as well, so the default
293	is good in almost all cases.	355	is good in almost all cases.
294		356
295	=item linger => <seconds>	357	=item linger => <seconds>
296		358
297	If non-zero (default: C<3600>), then the destructor of the	359	If this is non-zero (default: C<3600>), the destructor of the
298	AnyEvent::Handle object will check whether there is still outstanding	360	AnyEvent::Handle object will check whether there is still outstanding
299	write data and will install a watcher that will write this data to the	361	write data and will install a watcher that will write this data to the
300	socket. No errors will be reported (this mostly matches how the operating	362	socket. No errors will be reported (this mostly matches how the operating
301	system treats outstanding data at socket close time).	363	system treats outstanding data at socket close time).
302		364
…		…
309	A string used to identify the remote site - usually the DNS hostname	371	A string used to identify the remote site - usually the DNS hostname
310	(I<not> IDN!) used to create the connection, rarely the IP address.	372	(I<not> IDN!) used to create the connection, rarely the IP address.
311		373
312	Apart from being useful in error messages, this string is also used in TLS	374	Apart from being useful in error messages, this string is also used in TLS
313	peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This	375	peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This
314	verification will be skipped when C<peername> is not specified or	376	verification will be skipped when C<peername> is not specified or is
315	C<undef>.	377	C<undef>.
316		378
317	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object	379	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
318		380
319	When this parameter is given, it enables TLS (SSL) mode, that means	381	When this parameter is given, it enables TLS (SSL) mode, that means
320	AnyEvent will start a TLS handshake as soon as the conenction has been	382	AnyEvent will start a TLS handshake as soon as the connection has been
321	established and will transparently encrypt/decrypt data afterwards.	383	established and will transparently encrypt/decrypt data afterwards.
322		384
323	All TLS protocol errors will be signalled as C<EPROTO>, with an	385	All TLS protocol errors will be signalled as C<EPROTO>, with an
324	appropriate error message.	386	appropriate error message.
325		387
…		…
345	B<IMPORTANT:> since Net::SSLeay "objects" are really only integers,	407	B<IMPORTANT:> since Net::SSLeay "objects" are really only integers,
346	passing in the wrong integer will lead to certain crash. This most often	408	passing in the wrong integer will lead to certain crash. This most often
347	happens when one uses a stylish C<< tls => 1 >> and is surprised about the	409	happens when one uses a stylish C<< tls => 1 >> and is surprised about the
348	segmentation fault.	410	segmentation fault.
349		411
350	See the C<< ->starttls >> method for when need to start TLS negotiation later.	412	Use the C<< ->starttls >> method if you need to start TLS negotiation later.
351		413
352	=item tls_ctx => $anyevent_tls	414	=item tls_ctx => $anyevent_tls
353		415
354	Use the given C<AnyEvent::TLS> object to create the new TLS connection	416	Use the given C<AnyEvent::TLS> object to create the new TLS connection
355	(unless a connection object was specified directly). If this parameter is	417	(unless a connection object was specified directly). If this parameter is
…		…
370		432
371	TLS handshake failures will not cause C<on_error> to be invoked when this	433	TLS handshake failures will not cause C<on_error> to be invoked when this
372	callback is in effect, instead, the error message will be passed to C<on_starttls>.	434	callback is in effect, instead, the error message will be passed to C<on_starttls>.
373		435
374	Without this callback, handshake failures lead to C<on_error> being	436	Without this callback, handshake failures lead to C<on_error> being
375	called, as normal.	437	called as usual.
376		438
377	Note that you cannot call C<starttls> right again in this callback. If you	439	Note that you cannot just call C<starttls> again in this callback. If you
378	need to do that, start an zero-second timer instead whose callback can	440	need to do that, start an zero-second timer instead whose callback can
379	then call C<< ->starttls >> again.	441	then call C<< ->starttls >> again.
380		442
381	=item on_stoptls => $cb->($handle)	443	=item on_stoptls => $cb->($handle)
382		444
…		…
438	delete $self->{_skip_drain_rbuf};	500	delete $self->{_skip_drain_rbuf};
439	$self->_start;	501	$self->_start;
440		502
441	$self->{on_connect}	503	$self->{on_connect}
442	and $self->{on_connect}($self, $host, $port, sub {	504	and $self->{on_connect}($self, $host, $port, sub {
443	delete @$self{qw(fh _tw _ww _rw _eof _queue rbuf _wbuf tls _tls_rbuf _tls_wbuf)};	505	delete @$self{qw(fh _tw _rtw _wtw _ww _rw _eof _queue rbuf _wbuf tls _tls_rbuf _tls_wbuf)};
444	$self->{_skip_drain_rbuf} = 1;	506	$self->{_skip_drain_rbuf} = 1;
445	&$retry;	507	&$retry;
446	});	508	});
447		509
448	} else {	510	} else {
…		…
472	}	534	}
473		535
474	sub _start {	536	sub _start {
475	my ($self) = @_;	537	my ($self) = @_;
476		538
		539	# too many clueless people try to use udp and similar sockets
		540	# with AnyEvent::Handle, do them a favour.
		541	my $type = getsockopt $self->{fh}, Socket::SOL_SOCKET (), Socket::SO_TYPE ();
		542	Carp::croak "AnyEvent::Handle: only stream sockets supported, anything else will NOT work!"
		543	if Socket::SOCK_STREAM () != (unpack "I", $type) && defined $type;
		544
477	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;	545	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;
478		546
		547	$self->{_activity} =
		548	$self->{_ractivity} =
479	$self->{_activity} = AnyEvent->now;	549	$self->{_wactivity} = AE::now;
480	$self->_timeout;
481		550
		551	$self->timeout (delete $self->{timeout} ) if $self->{timeout};
		552	$self->rtimeout (delete $self->{rtimeout} ) if $self->{rtimeout};
		553	$self->wtimeout (delete $self->{wtimeout} ) if $self->{wtimeout};
		554
482	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};	555	$self->no_delay (delete $self->{no_delay} ) if exists $self->{no_delay} && $self->{no_delay};
		556	$self->keepalive (delete $self->{keepalive}) if exists $self->{keepalive} && $self->{keepalive};
483		557
		558	$self->oobinline (exists $self->{oobinline} ? delete $self->{oobinline} : 1);
		559
484	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})	560	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})
485	if $self->{tls};	561	if $self->{tls};
486		562
487	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};	563	$self->on_drain (delete $self->{on_drain} ) if $self->{on_drain};
488		564
489	$self->start_read	565	$self->start_read
490	if $self->{on_read} \|\| @{ $self->{_queue} };	566	if $self->{on_read} \|\| @{ $self->{_queue} };
491		567
492	$self->_drain_wbuf;	568	$self->_drain_wbuf;
493	}	569	}
494
495	#sub _shutdown {
496	# my ($self) = @_;
497	#
498	# delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)};
499	# $self->{_eof} = 1; # tell starttls et. al to stop trying
500	#
501	# &_freetls;
502	#}
503		570
504	sub _error {	571	sub _error {
505	my ($self, $errno, $fatal, $message) = @_;	572	my ($self, $errno, $fatal, $message) = @_;
506		573
507	$! = $errno;	574	$! = $errno;
508	$message \|\|= "$!";	575	$message \|\|= "$!";
509		576
510	if ($self->{on_error}) {	577	if ($self->{on_error}) {
511	$self->{on_error}($self, $fatal, $message);	578	$self->{on_error}($self, $fatal, $message);
512	$self->destroy if $fatal;	579	$self->destroy if $fatal;
513	} elsif ($self->{fh}) {	580	} elsif ($self->{fh} \|\| $self->{connect}) {
514	$self->destroy;	581	$self->destroy;
515	Carp::croak "AnyEvent::Handle uncaught error: $message";	582	Carp::croak "AnyEvent::Handle uncaught error: $message";
516	}	583	}
517	}	584	}
518		585
…		…
544	$_[0]{on_eof} = $_[1];	611	$_[0]{on_eof} = $_[1];
545	}	612	}
546		613
547	=item $handle->on_timeout ($cb)	614	=item $handle->on_timeout ($cb)
548		615
549	Replace the current C<on_timeout> callback, or disables the callback (but	616	=item $handle->on_rtimeout ($cb)
550	not the timeout) if C<$cb> = C<undef>. See the C<timeout> constructor
551	argument and method.
552		617
553	=cut	618	=item $handle->on_wtimeout ($cb)
554		619
555	sub on_timeout {	620	Replace the current C<on_timeout>, C<on_rtimeout> or C<on_wtimeout>
556	$_[0]{on_timeout} = $_[1];	621	callback, or disables the callback (but not the timeout) if C<$cb> =
557	}	622	C<undef>. See the C<timeout> constructor argument and method.
		623
		624	=cut
		625
		626	# see below
558		627
559	=item $handle->autocork ($boolean)	628	=item $handle->autocork ($boolean)
560		629
561	Enables or disables the current autocork behaviour (see C<autocork>	630	Enables or disables the current autocork behaviour (see C<autocork>
562	constructor argument). Changes will only take effect on the next write.	631	constructor argument). Changes will only take effect on the next write.
…		…
575	=cut	644	=cut
576		645
577	sub no_delay {	646	sub no_delay {
578	$_[0]{no_delay} = $_[1];	647	$_[0]{no_delay} = $_[1];
579		648
		649	setsockopt $_[0]{fh}, Socket::IPPROTO_TCP (), Socket::TCP_NODELAY (), int $_[1]
		650	if $_[0]{fh};
		651	}
		652
		653	=item $handle->keepalive ($boolean)
		654
		655	Enables or disables the C<keepalive> setting (see constructor argument of
		656	the same name for details).
		657
		658	=cut
		659
		660	sub keepalive {
		661	$_[0]{keepalive} = $_[1];
		662
580	eval {	663	eval {
581	local $SIG{__DIE__};	664	local $SIG{__DIE__};
582	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]	665	setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_KEEPALIVE (), int $_[1]
583	if $_[0]{fh};	666	if $_[0]{fh};
584	};	667	};
585	}	668	}
586		669
		670	=item $handle->oobinline ($boolean)
		671
		672	Enables or disables the C<oobinline> setting (see constructor argument of
		673	the same name for details).
		674
		675	=cut
		676
		677	sub oobinline {
		678	$_[0]{oobinline} = $_[1];
		679
		680	eval {
		681	local $SIG{__DIE__};
		682	setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_OOBINLINE (), int $_[1]
		683	if $_[0]{fh};
		684	};
		685	}
		686
		687	=item $handle->keepalive ($boolean)
		688
		689	Enables or disables the C<keepalive> setting (see constructor argument of
		690	the same name for details).
		691
		692	=cut
		693
		694	sub keepalive {
		695	$_[0]{keepalive} = $_[1];
		696
		697	eval {
		698	local $SIG{__DIE__};
		699	setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_KEEPALIVE (), int $_[1]
		700	if $_[0]{fh};
		701	};
		702	}
		703
587	=item $handle->on_starttls ($cb)	704	=item $handle->on_starttls ($cb)
588		705
589	Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument).	706	Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument).
590		707
591	=cut	708	=cut
…		…
598		715
599	Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument).	716	Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument).
600		717
601	=cut	718	=cut
602		719
603	sub on_starttls {	720	sub on_stoptls {
604	$_[0]{on_stoptls} = $_[1];	721	$_[0]{on_stoptls} = $_[1];
605	}	722	}
606		723
		724	=item $handle->rbuf_max ($max_octets)
		725
		726	Configures the C<rbuf_max> setting (C<undef> disables it).
		727
		728	=cut
		729
		730	sub rbuf_max {
		731	$_[0]{rbuf_max} = $_[1];
		732	}
		733
607	#############################################################################	734	#############################################################################
608		735
609	=item $handle->timeout ($seconds)	736	=item $handle->timeout ($seconds)
610		737
		738	=item $handle->rtimeout ($seconds)
		739
		740	=item $handle->wtimeout ($seconds)
		741
611	Configures (or disables) the inactivity timeout.	742	Configures (or disables) the inactivity timeout.
612		743
613	=cut	744	=item $handle->timeout_reset
614		745
615	sub timeout {	746	=item $handle->rtimeout_reset
		747
		748	=item $handle->wtimeout_reset
		749
		750	Reset the activity timeout, as if data was received or sent.
		751
		752	These methods are cheap to call.
		753
		754	=cut
		755
		756	for my $dir ("", "r", "w") {
		757	my $timeout = "${dir}timeout";
		758	my $tw = "_${dir}tw";
		759	my $on_timeout = "on_${dir}timeout";
		760	my $activity = "_${dir}activity";
		761	my $cb;
		762
		763	*$on_timeout = sub {
		764	$_[0]{$on_timeout} = $_[1];
		765	};
		766
		767	*$timeout = sub {
616	my ($self, $timeout) = @_;	768	my ($self, $new_value) = @_;
617		769
		770	$new_value >= 0
		771	or Carp::croak "AnyEvent::Handle->$timeout called with negative timeout ($new_value), caught";
		772
618	$self->{timeout} = $timeout;	773	$self->{$timeout} = $new_value;
619	$self->_timeout;	774	delete $self->{$tw}; &$cb;
620	}	775	};
621		776
		777	*{"${dir}timeout_reset"} = sub {
		778	$_[0]{$activity} = AE::now;
		779	};
		780
		781	# main workhorse:
622	# reset the timeout watcher, as neccessary	782	# reset the timeout watcher, as neccessary
623	# also check for time-outs	783	# also check for time-outs
624	sub _timeout {	784	$cb = sub {
625	my ($self) = @_;	785	my ($self) = @_;
626		786
627	if ($self->{timeout} && $self->{fh}) {	787	if ($self->{$timeout} && $self->{fh}) {
628	my $NOW = AnyEvent->now;	788	my $NOW = AE::now;
629		789
630	# when would the timeout trigger?	790	# when would the timeout trigger?
631	my $after = $self->{_activity} + $self->{timeout} - $NOW;	791	my $after = $self->{$activity} + $self->{$timeout} - $NOW;
632		792
633	# now or in the past already?	793	# now or in the past already?
634	if ($after <= 0) {	794	if ($after <= 0) {
635	$self->{_activity} = $NOW;	795	$self->{$activity} = $NOW;
636		796
637	if ($self->{on_timeout}) {	797	if ($self->{$on_timeout}) {
638	$self->{on_timeout}($self);	798	$self->{$on_timeout}($self);
639	} else {	799	} else {
640	$self->_error (Errno::ETIMEDOUT);	800	$self->_error (Errno::ETIMEDOUT);
		801	}
		802
		803	# callback could have changed timeout value, optimise
		804	return unless $self->{$timeout};
		805
		806	# calculate new after
		807	$after = $self->{$timeout};
641	}	808	}
642		809
643	# callback could have changed timeout value, optimise	810	Scalar::Util::weaken $self;
644	return unless $self->{timeout};	811	return unless $self; # ->error could have destroyed $self
645		812
646	# calculate new after	813	$self->{$tw} \|\|= AE::timer $after, 0, sub {
647	$after = $self->{timeout};	814	delete $self->{$tw};
		815	$cb->($self);
		816	};
		817	} else {
		818	delete $self->{$tw};
648	}	819	}
649
650	Scalar::Util::weaken $self;
651	return unless $self; # ->error could have destroyed $self
652
653	$self->{_tw} \|\|= AnyEvent->timer (after => $after, cb => sub {
654	delete $self->{_tw};
655	$self->_timeout;
656	});
657	} else {
658	delete $self->{_tw};
659	}	820	}
660	}	821	}
661		822
662	#############################################################################	823	#############################################################################
663		824
…		…
678		839
679	=item $handle->on_drain ($cb)	840	=item $handle->on_drain ($cb)
680		841
681	Sets the C<on_drain> callback or clears it (see the description of	842	Sets the C<on_drain> callback or clears it (see the description of
682	C<on_drain> in the constructor).	843	C<on_drain> in the constructor).
		844
		845	This method may invoke callbacks (and therefore the handle might be
		846	destroyed after it returns).
683		847
684	=cut	848	=cut
685		849
686	sub on_drain {	850	sub on_drain {
687	my ($self, $cb) = @_;	851	my ($self, $cb) = @_;
…		…
696		860
697	Queues the given scalar to be written. You can push as much data as you	861	Queues the given scalar to be written. You can push as much data as you
698	want (only limited by the available memory), as C<AnyEvent::Handle>	862	want (only limited by the available memory), as C<AnyEvent::Handle>
699	buffers it independently of the kernel.	863	buffers it independently of the kernel.
700		864
		865	This method may invoke callbacks (and therefore the handle might be
		866	destroyed after it returns).
		867
701	=cut	868	=cut
702		869
703	sub _drain_wbuf {	870	sub _drain_wbuf {
704	my ($self) = @_;	871	my ($self) = @_;
705		872
…		…
711	my $len = syswrite $self->{fh}, $self->{wbuf};	878	my $len = syswrite $self->{fh}, $self->{wbuf};
712		879
713	if (defined $len) {	880	if (defined $len) {
714	substr $self->{wbuf}, 0, $len, "";	881	substr $self->{wbuf}, 0, $len, "";
715		882
716	$self->{_activity} = AnyEvent->now;	883	$self->{_activity} = $self->{_wactivity} = AE::now;
717		884
718	$self->{on_drain}($self)	885	$self->{on_drain}($self)
719	if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf})	886	if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf})
720	&& $self->{on_drain};	887	&& $self->{on_drain};
721		888
…		…
727		894
728	# try to write data immediately	895	# try to write data immediately
729	$cb->() unless $self->{autocork};	896	$cb->() unless $self->{autocork};
730		897
731	# if still data left in wbuf, we need to poll	898	# if still data left in wbuf, we need to poll
732	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)	899	$self->{_ww} = AE::io $self->{fh}, 1, $cb
733	if length $self->{wbuf};	900	if length $self->{wbuf};
734	};	901	};
735	}	902	}
736		903
737	our %WH;	904	our %WH;
738		905
		906	# deprecated
739	sub register_write_type($$) {	907	sub register_write_type($$) {
740	$WH{$_[0]} = $_[1];	908	$WH{$_[0]} = $_[1];
741	}	909	}
742		910
743	sub push_write {	911	sub push_write {
744	my $self = shift;	912	my $self = shift;
745		913
746	if (@_ > 1) {	914	if (@_ > 1) {
747	my $type = shift;	915	my $type = shift;
748		916
		917	@_ = ($WH{$type} \|\|= _load_func "$type\::anyevent_write_type"
749	@_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write")	918	or Carp::croak "unsupported/unloadable type '$type' passed to AnyEvent::Handle::push_write")
750	->($self, @_);	919	->($self, @_);
751	}	920	}
752		921
		922	# we downgrade here to avoid hard-to-track-down bugs,
		923	# and diagnose the problem earlier and better.
		924
753	if ($self->{tls}) {	925	if ($self->{tls}) {
754	$self->{_tls_wbuf} .= $_[0];	926	utf8::downgrade $self->{_tls_wbuf} .= $_[0];
755	&_dotls ($self) if $self->{fh};	927	&_dotls ($self) if $self->{fh};
756	} else {	928	} else {
757	$self->{wbuf} .= $_[0];	929	utf8::downgrade $self->{wbuf} .= $_[0];
758	$self->_drain_wbuf if $self->{fh};	930	$self->_drain_wbuf if $self->{fh};
759	}	931	}
760	}	932	}
761		933
762	=item $handle->push_write (type => @args)	934	=item $handle->push_write (type => @args)
763		935
764	Instead of formatting your data yourself, you can also let this module do	936	Instead of formatting your data yourself, you can also let this module
765	the job by specifying a type and type-specific arguments.	937	do the job by specifying a type and type-specific arguments. You
		938	can also specify the (fully qualified) name of a package, in which
		939	case AnyEvent tries to load the package and then expects to find the
		940	C<anyevent_write_type> function inside (see "custom write types", below).
766		941
767	Predefined types are (if you have ideas for additional types, feel free to	942	Predefined types are (if you have ideas for additional types, feel free to
768	drop by and tell us):	943	drop by and tell us):
769		944
770	=over 4	945	=over 4
…		…
827	Other languages could read single lines terminated by a newline and pass	1002	Other languages could read single lines terminated by a newline and pass
828	this line into their JSON decoder of choice.	1003	this line into their JSON decoder of choice.
829		1004
830	=cut	1005	=cut
831		1006
		1007	sub json_coder() {
		1008	eval { require JSON::XS; JSON::XS->new->utf8 }
		1009	\|\| do { require JSON; JSON->new->utf8 }
		1010	}
		1011
832	register_write_type json => sub {	1012	register_write_type json => sub {
833	my ($self, $ref) = @_;	1013	my ($self, $ref) = @_;
834		1014
835	require JSON;	1015	my $json = $self->{json} \|\|= json_coder;
836		1016
837	$self->{json} ? $self->{json}->encode ($ref)	1017	$json->encode ($ref)
838	: JSON::encode_json ($ref)
839	};	1018	};
840		1019
841	=item storable => $reference	1020	=item storable => $reference
842		1021
843	Freezes the given reference using L<Storable> and writes it to the	1022	Freezes the given reference using L<Storable> and writes it to the
…		…
869	the peer.	1048	the peer.
870		1049
871	You can rely on the normal read queue and C<on_eof> handling	1050	You can rely on the normal read queue and C<on_eof> handling
872	afterwards. This is the cleanest way to close a connection.	1051	afterwards. This is the cleanest way to close a connection.
873		1052
		1053	This method may invoke callbacks (and therefore the handle might be
		1054	destroyed after it returns).
		1055
874	=cut	1056	=cut
875		1057
876	sub push_shutdown {	1058	sub push_shutdown {
877	my ($self) = @_;	1059	my ($self) = @_;
878		1060
879	delete $self->{low_water_mark};	1061	delete $self->{low_water_mark};
880	$self->on_drain (sub { shutdown $_[0]{fh}, 1 });	1062	$self->on_drain (sub { shutdown $_[0]{fh}, 1 });
881	}	1063	}
882		1064
883	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	1065	=item custom write types - Package::anyevent_write_type $handle, @args
884		1066
885	This function (not method) lets you add your own types to C<push_write>.	1067	Instead of one of the predefined types, you can also specify the name of
		1068	a package. AnyEvent will try to load the package and then expects to find
		1069	a function named C<anyevent_write_type> inside. If it isn't found, it
		1070	progressively tries to load the parent package until it either finds the
		1071	function (good) or runs out of packages (bad).
		1072
886	Whenever the given C<type> is used, C<push_write> will invoke the code	1073	Whenever the given C<type> is used, C<push_write> will the function with
887	reference with the handle object and the remaining arguments.	1074	the handle object and the remaining arguments.
888		1075
889	The code reference is supposed to return a single octet string that will	1076	The function is supposed to return a single octet string that will be
890	be appended to the write buffer.	1077	appended to the write buffer, so you cna mentally treat this function as a
		1078	"arguments to on-the-wire-format" converter.
891		1079
892	Note that this is a function, and all types registered this way will be	1080	Example: implement a custom write type C<join> that joins the remaining
893	global, so try to use unique names.	1081	arguments using the first one.
		1082
		1083	$handle->push_write (My::Type => " ", 1,2,3);
		1084
		1085	# uses the following package, which can be defined in the "My::Type" or in
		1086	# the "My" modules to be auto-loaded, or just about anywhere when the
		1087	# My::Type::anyevent_write_type is defined before invoking it.
		1088
		1089	package My::Type;
		1090
		1091	sub anyevent_write_type {
		1092	my ($handle, $delim, @args) = @_;
		1093
		1094	join $delim, @args
		1095	}
894		1096
895	=cut	1097	=cut
896		1098
897	#############################################################################	1099	#############################################################################
898		1100
…		…
907	ways, the "simple" way, using only C<on_read> and the "complex" way, using	1109	ways, the "simple" way, using only C<on_read> and the "complex" way, using
908	a queue.	1110	a queue.
909		1111
910	In the simple case, you just install an C<on_read> callback and whenever	1112	In the simple case, you just install an C<on_read> callback and whenever
911	new data arrives, it will be called. You can then remove some data (if	1113	new data arrives, it will be called. You can then remove some data (if
912	enough is there) from the read buffer (C<< $handle->rbuf >>). Or you cna	1114	enough is there) from the read buffer (C<< $handle->rbuf >>). Or you can
913	leave the data there if you want to accumulate more (e.g. when only a	1115	leave the data there if you want to accumulate more (e.g. when only a
914	partial message has been received so far).	1116	partial message has been received so far), or change the read queue with
		1117	e.g. C<push_read>.
915		1118
916	In the more complex case, you want to queue multiple callbacks. In this	1119	In the more complex case, you want to queue multiple callbacks. In this
917	case, AnyEvent::Handle will call the first queued callback each time new	1120	case, AnyEvent::Handle will call the first queued callback each time new
918	data arrives (also the first time it is queued) and removes it when it has	1121	data arrives (also the first time it is queued) and remove it when it has
919	done its job (see C<push_read>, below).	1122	done its job (see C<push_read>, below).
920		1123
921	This way you can, for example, push three line-reads, followed by reading	1124	This way you can, for example, push three line-reads, followed by reading
922	a chunk of data, and AnyEvent::Handle will execute them in order.	1125	a chunk of data, and AnyEvent::Handle will execute them in order.
923		1126
…		…
981		1184
982	sub _drain_rbuf {	1185	sub _drain_rbuf {
983	my ($self) = @_;	1186	my ($self) = @_;
984		1187
985	# avoid recursion	1188	# avoid recursion
986	return if exists $self->{_skip_drain_rbuf};	1189	return if $self->{_skip_drain_rbuf};
987	local $self->{_skip_drain_rbuf} = 1;	1190	local $self->{_skip_drain_rbuf} = 1;
988
989	if (
990	defined $self->{rbuf_max}
991	&& $self->{rbuf_max} < length $self->{rbuf}
992	) {
993	$self->_error (Errno::ENOSPC, 1), return;
994	}
995		1191
996	while () {	1192	while () {
997	# we need to use a separate tls read buffer, as we must not receive data while	1193	# we need to use a separate tls read buffer, as we must not receive data while
998	# we are draining the buffer, and this can only happen with TLS.	1194	# we are draining the buffer, and this can only happen with TLS.
999	$self->{rbuf} .= delete $self->{_tls_rbuf} if exists $self->{_tls_rbuf};	1195	$self->{rbuf} .= delete $self->{_tls_rbuf}
		1196	if exists $self->{_tls_rbuf};
1000		1197
1001	my $len = length $self->{rbuf};	1198	my $len = length $self->{rbuf};
1002		1199
1003	if (my $cb = shift @{ $self->{_queue} }) {	1200	if (my $cb = shift @{ $self->{_queue} }) {
1004	unless ($cb->($self)) {	1201	unless ($cb->($self)) {
1005	if ($self->{_eof}) {	1202	# no progress can be made
1006	# no progress can be made (not enough data and no data forthcoming)	1203	# (not enough data and no data forthcoming)
1007	$self->_error (Errno::EPIPE, 1), return;	1204	$self->_error (Errno::EPIPE, 1), return
1008	}	1205	if $self->{_eof};
1009		1206
1010	unshift @{ $self->{_queue} }, $cb;	1207	unshift @{ $self->{_queue} }, $cb;
1011	last;	1208	last;
1012	}	1209	}
1013	} elsif ($self->{on_read}) {	1210	} elsif ($self->{on_read}) {
…		…
1033	last;	1230	last;
1034	}	1231	}
1035	}	1232	}
1036		1233
1037	if ($self->{_eof}) {	1234	if ($self->{_eof}) {
1038	if ($self->{on_eof}) {	1235	$self->{on_eof}
1039	$self->{on_eof}($self)	1236	? $self->{on_eof}($self)
1040	} else {
1041	$self->_error (0, 1, "Unexpected end-of-file");	1237	: $self->_error (0, 1, "Unexpected end-of-file");
1042	}	1238
		1239	return;
		1240	}
		1241
		1242	if (
		1243	defined $self->{rbuf_max}
		1244	&& $self->{rbuf_max} < length $self->{rbuf}
		1245	) {
		1246	$self->_error (Errno::ENOSPC, 1), return;
1043	}	1247	}
1044		1248
1045	# may need to restart read watcher	1249	# may need to restart read watcher
1046	unless ($self->{_rw}) {	1250	unless ($self->{_rw}) {
1047	$self->start_read	1251	$self->start_read
…		…
1053		1257
1054	This replaces the currently set C<on_read> callback, or clears it (when	1258	This replaces the currently set C<on_read> callback, or clears it (when
1055	the new callback is C<undef>). See the description of C<on_read> in the	1259	the new callback is C<undef>). See the description of C<on_read> in the
1056	constructor.	1260	constructor.
1057		1261
		1262	This method may invoke callbacks (and therefore the handle might be
		1263	destroyed after it returns).
		1264
1058	=cut	1265	=cut
1059		1266
1060	sub on_read {	1267	sub on_read {
1061	my ($self, $cb) = @_;	1268	my ($self, $cb) = @_;
1062		1269
…		…
1064	$self->_drain_rbuf if $cb;	1271	$self->_drain_rbuf if $cb;
1065	}	1272	}
1066		1273
1067	=item $handle->rbuf	1274	=item $handle->rbuf
1068		1275
1069	Returns the read buffer (as a modifiable lvalue).	1276	Returns the read buffer (as a modifiable lvalue). You can also access the
		1277	read buffer directly as the C<< ->{rbuf} >> member, if you want (this is
		1278	much faster, and no less clean).
1070		1279
1071	You can access the read buffer directly as the C<< ->{rbuf} >>	1280	The only operation allowed on the read buffer (apart from looking at it)
1072	member, if you want. However, the only operation allowed on the	1281	is removing data from its beginning. Otherwise modifying or appending to
1073	read buffer (apart from looking at it) is removing data from its	1282	it is not allowed and will lead to hard-to-track-down bugs.
1074	beginning. Otherwise modifying or appending to it is not allowed and will
1075	lead to hard-to-track-down bugs.
1076		1283
1077	NOTE: The read buffer should only be used or modified if the C<on_read>,	1284	NOTE: The read buffer should only be used or modified in the C<on_read>
1078	C<push_read> or C<unshift_read> methods are used. The other read methods	1285	callback or when C<push_read> or C<unshift_read> are used with a single
1079	automatically manage the read buffer.	1286	callback (i.e. untyped). Typed C<push_read> and C<unshift_read> methods
		1287	will manage the read buffer on their own.
1080		1288
1081	=cut	1289	=cut
1082		1290
1083	sub rbuf : lvalue {	1291	sub rbuf : lvalue {
1084	$_[0]{rbuf}	1292	$_[0]{rbuf}
…		…
1101		1309
1102	If enough data was available, then the callback must remove all data it is	1310	If enough data was available, then the callback must remove all data it is
1103	interested in (which can be none at all) and return a true value. After returning	1311	interested in (which can be none at all) and return a true value. After returning
1104	true, it will be removed from the queue.	1312	true, it will be removed from the queue.
1105		1313
		1314	These methods may invoke callbacks (and therefore the handle might be
		1315	destroyed after it returns).
		1316
1106	=cut	1317	=cut
1107		1318
1108	our %RH;	1319	our %RH;
1109		1320
1110	sub register_read_type($$) {	1321	sub register_read_type($$) {
…		…
1116	my $cb = pop;	1327	my $cb = pop;
1117		1328
1118	if (@_) {	1329	if (@_) {
1119	my $type = shift;	1330	my $type = shift;
1120		1331
		1332	$cb = ($RH{$type} \|\|= _load_func "$type\::anyevent_read_type"
1121	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	1333	or Carp::croak "unsupported/unloadable type '$type' passed to AnyEvent::Handle::push_read")
1122	->($self, $cb, @_);	1334	->($self, $cb, @_);
1123	}	1335	}
1124		1336
1125	push @{ $self->{_queue} }, $cb;	1337	push @{ $self->{_queue} }, $cb;
1126	$self->_drain_rbuf;	1338	$self->_drain_rbuf;
…		…
1131	my $cb = pop;	1343	my $cb = pop;
1132		1344
1133	if (@_) {	1345	if (@_) {
1134	my $type = shift;	1346	my $type = shift;
1135		1347
		1348	$cb = ($RH{$type} \|\|= _load_func "$type\::anyevent_read_type"
1136	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read")	1349	or Carp::croak "unsupported/unloadable type '$type' passed to AnyEvent::Handle::unshift_read")
1137	->($self, $cb, @_);	1350	->($self, $cb, @_);
1138	}	1351	}
1139
1140		1352
1141	unshift @{ $self->{_queue} }, $cb;	1353	unshift @{ $self->{_queue} }, $cb;
1142	$self->_drain_rbuf;	1354	$self->_drain_rbuf;
1143	}	1355	}
1144		1356
…		…
1146		1358
1147	=item $handle->unshift_read (type => @args, $cb)	1359	=item $handle->unshift_read (type => @args, $cb)
1148		1360
1149	Instead of providing a callback that parses the data itself you can chose	1361	Instead of providing a callback that parses the data itself you can chose
1150	between a number of predefined parsing formats, for chunks of data, lines	1362	between a number of predefined parsing formats, for chunks of data, lines
1151	etc.	1363	etc. You can also specify the (fully qualified) name of a package, in
		1364	which case AnyEvent tries to load the package and then expects to find the
		1365	C<anyevent_read_type> function inside (see "custom read types", below).
1152		1366
1153	Predefined types are (if you have ideas for additional types, feel free to	1367	Predefined types are (if you have ideas for additional types, feel free to
1154	drop by and tell us):	1368	drop by and tell us):
1155		1369
1156	=over 4	1370	=over 4
…		…
1248	the receive buffer when neither C<$accept> nor C<$reject> match,	1462	the receive buffer when neither C<$accept> nor C<$reject> match,
1249	and everything preceding and including the match will be accepted	1463	and everything preceding and including the match will be accepted
1250	unconditionally. This is useful to skip large amounts of data that you	1464	unconditionally. This is useful to skip large amounts of data that you
1251	know cannot be matched, so that the C<$accept> or C<$reject> regex do not	1465	know cannot be matched, so that the C<$accept> or C<$reject> regex do not
1252	have to start matching from the beginning. This is purely an optimisation	1466	have to start matching from the beginning. This is purely an optimisation
1253	and is usually worth only when you expect more than a few kilobytes.	1467	and is usually worth it only when you expect more than a few kilobytes.
1254		1468
1255	Example: expect a http header, which ends at C<\015\012\015\012>. Since we	1469	Example: expect a http header, which ends at C<\015\012\015\012>. Since we
1256	expect the header to be very large (it isn't in practise, but...), we use	1470	expect the header to be very large (it isn't in practice, but...), we use
1257	a skip regex to skip initial portions. The skip regex is tricky in that	1471	a skip regex to skip initial portions. The skip regex is tricky in that
1258	it only accepts something not ending in either \015 or \012, as these are	1472	it only accepts something not ending in either \015 or \012, as these are
1259	required for the accept regex.	1473	required for the accept regex.
1260		1474
1261	$handle->push_read (regex =>	1475	$handle->push_read (regex =>
…		…
1396	=cut	1610	=cut
1397		1611
1398	register_read_type json => sub {	1612	register_read_type json => sub {
1399	my ($self, $cb) = @_;	1613	my ($self, $cb) = @_;
1400		1614
1401	my $json = $self->{json} \|\|=	1615	my $json = $self->{json} \|\|= json_coder;
1402	eval { require JSON::XS; JSON::XS->new->utf8 }
1403	\|\| do { require JSON; JSON->new->utf8 };
1404		1616
1405	my $data;	1617	my $data;
1406	my $rbuf = \$self->{rbuf};	1618	my $rbuf = \$self->{rbuf};
1407		1619
1408	sub {	1620	sub {
…		…
1477	}	1689	}
1478	};	1690	};
1479		1691
1480	=back	1692	=back
1481		1693
1482	=item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args)	1694	=item custom read types - Package::anyevent_read_type $handle, $cb, @args
1483		1695
1484	This function (not method) lets you add your own types to C<push_read>.	1696	Instead of one of the predefined types, you can also specify the name
		1697	of a package. AnyEvent will try to load the package and then expects to
		1698	find a function named C<anyevent_read_type> inside. If it isn't found, it
		1699	progressively tries to load the parent package until it either finds the
		1700	function (good) or runs out of packages (bad).
1485		1701
1486	Whenever the given C<type> is used, C<push_read> will invoke the code	1702	Whenever this type is used, C<push_read> will invoke the function with the
1487	reference with the handle object, the callback and the remaining	1703	handle object, the original callback and the remaining arguments.
1488	arguments.
1489		1704
1490	The code reference is supposed to return a callback (usually a closure)	1705	The function is supposed to return a callback (usually a closure) that
1491	that works as a plain read callback (see C<< ->push_read ($cb) >>).	1706	works as a plain read callback (see C<< ->push_read ($cb) >>), so you can
		1707	mentally treat the function as a "configurable read type to read callback"
		1708	converter.
1492		1709
1493	It should invoke the passed callback when it is done reading (remember to	1710	It should invoke the original callback when it is done reading (remember
1494	pass C<$handle> as first argument as all other callbacks do that).	1711	to pass C<$handle> as first argument as all other callbacks do that,
		1712	although there is no strict requirement on this).
1495		1713
1496	Note that this is a function, and all types registered this way will be
1497	global, so try to use unique names.
1498
1499	For examples, see the source of this module (F<perldoc -m AnyEvent::Handle>,	1714	For examples, see the source of this module (F<perldoc -m
1500	search for C<register_read_type>)).	1715	AnyEvent::Handle>, search for C<register_read_type>)).
1501		1716
1502	=item $handle->stop_read	1717	=item $handle->stop_read
1503		1718
1504	=item $handle->start_read	1719	=item $handle->start_read
1505		1720
…		…
1525	}	1740	}
1526		1741
1527	sub start_read {	1742	sub start_read {
1528	my ($self) = @_;	1743	my ($self) = @_;
1529		1744
1530	unless ($self->{_rw} \|\| $self->{_eof}) {	1745	unless ($self->{_rw} \|\| $self->{_eof} \|\| !$self->{fh}) {
1531	Scalar::Util::weaken $self;	1746	Scalar::Util::weaken $self;
1532		1747
1533	$self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {	1748	$self->{_rw} = AE::io $self->{fh}, 0, sub {
1534	my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf});	1749	my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf});
1535	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} \|\| 8192, length $$rbuf;	1750	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} \|\| 8192, length $$rbuf;
1536		1751
1537	if ($len > 0) {	1752	if ($len > 0) {
1538	$self->{_activity} = AnyEvent->now;	1753	$self->{_activity} = $self->{_ractivity} = AE::now;
1539		1754
1540	if ($self->{tls}) {	1755	if ($self->{tls}) {
1541	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);	1756	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);
1542		1757
1543	&_dotls ($self);	1758	&_dotls ($self);
…		…
1551	$self->_drain_rbuf;	1766	$self->_drain_rbuf;
1552		1767
1553	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	1768	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
1554	return $self->_error ($!, 1);	1769	return $self->_error ($!, 1);
1555	}	1770	}
1556	});	1771	};
1557	}	1772	}
1558	}	1773	}
1559		1774
1560	our $ERROR_SYSCALL;	1775	our $ERROR_SYSCALL;
1561	our $ERROR_WANT_READ;	1776	our $ERROR_WANT_READ;
…		…
1628	&& ($tmp != $ERROR_SYSCALL \|\| $!);	1843	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1629		1844
1630	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {	1845	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {
1631	$self->{wbuf} .= $tmp;	1846	$self->{wbuf} .= $tmp;
1632	$self->_drain_wbuf;	1847	$self->_drain_wbuf;
		1848	$self->{tls} or return; # tls session might have gone away in callback
1633	}	1849	}
1634		1850
1635	$self->{_on_starttls}	1851	$self->{_on_starttls}
1636	and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK ()	1852	and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK ()
1637	and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established");	1853	and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established");
…		…
1659	context in C<< $handle->{tls_ctx} >> after this call and can be used or	1875	context in C<< $handle->{tls_ctx} >> after this call and can be used or
1660	changed to your liking. Note that the handshake might have already started	1876	changed to your liking. Note that the handshake might have already started
1661	when this function returns.	1877	when this function returns.
1662		1878
1663	Due to bugs in OpenSSL, it might or might not be possible to do multiple	1879	Due to bugs in OpenSSL, it might or might not be possible to do multiple
1664	handshakes on the same stream. Best do not attempt to use the stream after	1880	handshakes on the same stream. It is best to not attempt to use the
1665	stopping TLS.	1881	stream after stopping TLS.
		1882
		1883	This method may invoke callbacks (and therefore the handle might be
		1884	destroyed after it returns).
1666		1885
1667	=cut	1886	=cut
1668		1887
1669	our %TLS_CACHE; #TODO not yet documented, should we?	1888	our %TLS_CACHE; #TODO not yet documented, should we?
1670		1889
…		…
1682	require Net::SSLeay;	1901	require Net::SSLeay;
1683		1902
1684	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();	1903	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();
1685	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();	1904	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();
1686		1905
1687	$tls = $self->{tls};	1906	$tls = delete $self->{tls};
1688	$ctx = $self->{tls_ctx};	1907	$ctx = $self->{tls_ctx};
1689		1908
1690	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session	1909	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session
1691		1910
1692	if ("HASH" eq ref $ctx) {	1911	if ("HASH" eq ref $ctx) {
…		…
1721	Net::SSLeay::CTX_set_mode ($tls, 1\|2);	1940	Net::SSLeay::CTX_set_mode ($tls, 1\|2);
1722		1941
1723	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1942	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1724	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1943	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1725		1944
		1945	Net::SSLeay::BIO_write ($self->{_rbio}, delete $self->{rbuf});
		1946
1726	Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio});	1947	Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio});
1727		1948
1728	$self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) }	1949	$self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) }
1729	if $self->{on_starttls};	1950	if $self->{on_starttls};
1730		1951
…		…
1734		1955
1735	=item $handle->stoptls	1956	=item $handle->stoptls
1736		1957
1737	Shuts down the SSL connection - this makes a proper EOF handshake by	1958	Shuts down the SSL connection - this makes a proper EOF handshake by
1738	sending a close notify to the other side, but since OpenSSL doesn't	1959	sending a close notify to the other side, but since OpenSSL doesn't
1739	support non-blocking shut downs, it is not guarenteed that you can re-use	1960	support non-blocking shut downs, it is not guaranteed that you can re-use
1740	the stream afterwards.	1961	the stream afterwards.
		1962
		1963	This method may invoke callbacks (and therefore the handle might be
		1964	destroyed after it returns).
1741		1965
1742	=cut	1966	=cut
1743		1967
1744	sub stoptls {	1968	sub stoptls {
1745	my ($self) = @_;	1969	my ($self) = @_;
1746		1970
1747	if ($self->{tls}) {	1971	if ($self->{tls} && $self->{fh}) {
1748	Net::SSLeay::shutdown ($self->{tls});	1972	Net::SSLeay::shutdown ($self->{tls});
1749		1973
1750	&_dotls;	1974	&_dotls;
1751		1975
1752	# # we don't give a shit. no, we do, but we can't. no...#d#	1976	# # we don't give a shit. no, we do, but we can't. no...#d#
…		…
1759	my ($self) = @_;	1983	my ($self) = @_;
1760		1984
1761	return unless $self->{tls};	1985	return unless $self->{tls};
1762		1986
1763	$self->{tls_ctx}->_put_session (delete $self->{tls})	1987	$self->{tls_ctx}->_put_session (delete $self->{tls})
1764	if ref $self->{tls};	1988	if $self->{tls} > 0;
1765		1989
1766	delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)};	1990	delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)};
1767	}	1991	}
1768		1992
1769	sub DESTROY {	1993	sub DESTROY {
…		…
1777	my $fh = delete $self->{fh};	2001	my $fh = delete $self->{fh};
1778	my $wbuf = delete $self->{wbuf};	2002	my $wbuf = delete $self->{wbuf};
1779		2003
1780	my @linger;	2004	my @linger;
1781		2005
1782	push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub {	2006	push @linger, AE::io $fh, 1, sub {
1783	my $len = syswrite $fh, $wbuf, length $wbuf;	2007	my $len = syswrite $fh, $wbuf, length $wbuf;
1784		2008
1785	if ($len > 0) {	2009	if ($len > 0) {
1786	substr $wbuf, 0, $len, "";	2010	substr $wbuf, 0, $len, "";
1787	} else {	2011	} elsif (defined $len \|\| ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK)) {
1788	@linger = (); # end	2012	@linger = (); # end
1789	}	2013	}
1790	});	2014	};
1791	push @linger, AnyEvent->timer (after => $linger, cb => sub {	2015	push @linger, AE::timer $linger, 0, sub {
1792	@linger = ();	2016	@linger = ();
1793	});	2017	};
1794	}	2018	}
1795	}	2019	}
1796		2020
1797	=item $handle->destroy	2021	=item $handle->destroy
1798		2022
1799	Shuts down the handle object as much as possible - this call ensures that	2023	Shuts down the handle object as much as possible - this call ensures that
1800	no further callbacks will be invoked and as many resources as possible	2024	no further callbacks will be invoked and as many resources as possible
1801	will be freed. You must not call any methods on the object afterwards.	2025	will be freed. Any method you will call on the handle object after
		2026	destroying it in this way will be silently ignored (and it will return the
		2027	empty list).
1802		2028
1803	Normally, you can just "forget" any references to an AnyEvent::Handle	2029	Normally, you can just "forget" any references to an AnyEvent::Handle
1804	object and it will simply shut down. This works in fatal error and EOF	2030	object and it will simply shut down. This works in fatal error and EOF
1805	callbacks, as well as code outside. It does I<NOT> work in a read or write	2031	callbacks, as well as code outside. It does I<NOT> work in a read or write
1806	callback, so when you want to destroy the AnyEvent::Handle object from	2032	callback, so when you want to destroy the AnyEvent::Handle object from
…		…
1820	sub destroy {	2046	sub destroy {
1821	my ($self) = @_;	2047	my ($self) = @_;
1822		2048
1823	$self->DESTROY;	2049	$self->DESTROY;
1824	%$self = ();	2050	%$self = ();
		2051	bless $self, "AnyEvent::Handle::destroyed";
1825	}	2052	}
		2053
		2054	sub AnyEvent::Handle::destroyed::AUTOLOAD {
		2055	#nop
		2056	}
		2057
		2058	=item $handle->destroyed
		2059
		2060	Returns false as long as the handle hasn't been destroyed by a call to C<<
		2061	->destroy >>, true otherwise.
		2062
		2063	Can be useful to decide whether the handle is still valid after some
		2064	callback possibly destroyed the handle. For example, C<< ->push_write >>,
		2065	C<< ->starttls >> and other methods can call user callbacks, which in turn
		2066	can destroy the handle, so work can be avoided by checking sometimes:
		2067
		2068	$hdl->starttls ("accept");
		2069	return if $hdl->destroyed;
		2070	$hdl->push_write (...
		2071
		2072	Note that the call to C<push_write> will silently be ignored if the handle
		2073	has been destroyed, so often you can just ignore the possibility of the
		2074	handle being destroyed.
		2075
		2076	=cut
		2077
		2078	sub destroyed { 0 }
		2079	sub AnyEvent::Handle::destroyed::destroyed { 1 }
1826		2080
1827	=item AnyEvent::Handle::TLS_CTX	2081	=item AnyEvent::Handle::TLS_CTX
1828		2082
1829	This function creates and returns the AnyEvent::TLS object used by default	2083	This function creates and returns the AnyEvent::TLS object used by default
1830	for TLS mode.	2084	for TLS mode.
…		…
1862		2116
1863	=item I get different callback invocations in TLS mode/Why can't I pause	2117	=item I get different callback invocations in TLS mode/Why can't I pause
1864	reading?	2118	reading?
1865		2119
1866	Unlike, say, TCP, TLS connections do not consist of two independent	2120	Unlike, say, TCP, TLS connections do not consist of two independent
1867	communication channels, one for each direction. Or put differently. The	2121	communication channels, one for each direction. Or put differently, the
1868	read and write directions are not independent of each other: you cannot	2122	read and write directions are not independent of each other: you cannot
1869	write data unless you are also prepared to read, and vice versa.	2123	write data unless you are also prepared to read, and vice versa.
1870		2124
1871	This can mean than, in TLS mode, you might get C<on_error> or C<on_eof>	2125	This means that, in TLS mode, you might get C<on_error> or C<on_eof>
1872	callback invocations when you are not expecting any read data - the reason	2126	callback invocations when you are not expecting any read data - the reason
1873	is that AnyEvent::Handle always reads in TLS mode.	2127	is that AnyEvent::Handle always reads in TLS mode.
1874		2128
1875	During the connection, you have to make sure that you always have a	2129	During the connection, you have to make sure that you always have a
1876	non-empty read-queue, or an C<on_read> watcher. At the end of the	2130	non-empty read-queue, or an C<on_read> watcher. At the end of the
…		…
1890	my $data = delete $_[0]{rbuf};	2144	my $data = delete $_[0]{rbuf};
1891	});	2145	});
1892		2146
1893	The reason to use C<on_error> is that TCP connections, due to latencies	2147	The reason to use C<on_error> is that TCP connections, due to latencies
1894	and packets loss, might get closed quite violently with an error, when in	2148	and packets loss, might get closed quite violently with an error, when in
1895	fact, all data has been received.	2149	fact all data has been received.
1896		2150
1897	It is usually better to use acknowledgements when transferring data,	2151	It is usually better to use acknowledgements when transferring data,
1898	to make sure the other side hasn't just died and you got the data	2152	to make sure the other side hasn't just died and you got the data
1899	intact. This is also one reason why so many internet protocols have an	2153	intact. This is also one reason why so many internet protocols have an
1900	explicit QUIT command.	2154	explicit QUIT command.
…		…
1917	consider using C<< ->push_shutdown >> instead.	2171	consider using C<< ->push_shutdown >> instead.
1918		2172
1919	=item I want to contact a TLS/SSL server, I don't care about security.	2173	=item I want to contact a TLS/SSL server, I don't care about security.
1920		2174
1921	If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS,	2175	If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS,
1922	simply connect to it and then create the AnyEvent::Handle with the C<tls>	2176	connect to it and then create the AnyEvent::Handle with the C<tls>
1923	parameter:	2177	parameter:
1924		2178
1925	tcp_connect $host, $port, sub {	2179	tcp_connect $host, $port, sub {
1926	my ($fh) = @_;	2180	my ($fh) = @_;
1927		2181
…		…
2027		2281
2028	=item * all members not documented here and not prefixed with an underscore	2282	=item * all members not documented here and not prefixed with an underscore
2029	are free to use in subclasses.	2283	are free to use in subclasses.
2030		2284
2031	Of course, new versions of AnyEvent::Handle may introduce more "public"	2285	Of course, new versions of AnyEvent::Handle may introduce more "public"
2032	member variables, but thats just life, at least it is documented.	2286	member variables, but that's just life. At least it is documented.
2033		2287
2034	=back	2288	=back
2035		2289
2036	=head1 AUTHOR	2290	=head1 AUTHOR
2037		2291

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.161 by root, Sat Jul 25 06:16:45 2009 UTC vs. Revision 1.202 by root, Sat Oct 16 02:01:54 2010 UTC

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.161 by root, Sat Jul 25 06:16:45 2009 UTC vs.
Revision 1.202 by root, Sat Oct 16 02:01:54 2010 UTC