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

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.9 by root, Fri May 2 16:07:46 2008 UTC vs.
Revision 1.60 by root, Thu Jun 5 18:30:08 2008 UTC

…		…
2		2
3	no warnings;	3	no warnings;
4	use strict;	4	use strict;
5		5
6	use AnyEvent ();	6	use AnyEvent ();
7	use AnyEvent::Util ();	7	use AnyEvent::Util qw(WSAEWOULDBLOCK);
8	use Scalar::Util ();	8	use Scalar::Util ();
9	use Carp ();	9	use Carp ();
10	use Fcntl ();	10	use Fcntl ();
11	use Errno qw/EAGAIN EINTR/;	11	use Errno qw(EAGAIN EINTR);
12		12
13	=head1 NAME	13	=head1 NAME
14		14
15	AnyEvent::Handle - non-blocking I/O on filehandles via AnyEvent	15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16		16
17	=cut	17	=cut
18		18
19	our $VERSION = '0.02';	19	our $VERSION = 4.14;
20		20
21	=head1 SYNOPSIS	21	=head1 SYNOPSIS
22		22
23	use AnyEvent;	23	use AnyEvent;
24	use AnyEvent::Handle;	24	use AnyEvent::Handle;
25		25
26	my $cv = AnyEvent->condvar;	26	my $cv = AnyEvent->condvar;
27		27
28	my $ae_fh = AnyEvent::Handle->new (fh => \*STDIN);	28	my $handle =
29
30	#TODO
31
32	# or use the constructor to pass the callback:
33
34	my $ae_fh2 =
35	AnyEvent::Handle->new (	29	AnyEvent::Handle->new (
36	fh => \*STDIN,	30	fh => \*STDIN,
37	on_eof => sub {	31	on_eof => sub {
38	$cv->broadcast;	32	$cv->broadcast;
39	},	33	},
40	#TODO
41	);	34	);
42		35
43	$cv->wait;	36	# send some request line
		37	$handle->push_write ("getinfo\015\012");
		38
		39	# read the response line
		40	$handle->push_read (line => sub {
		41	my ($handle, $line) = @_;
		42	warn "read line <$line>\n";
		43	$cv->send;
		44	});
		45
		46	$cv->recv;
44		47
45	=head1 DESCRIPTION	48	=head1 DESCRIPTION
46		49
47	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
48	filehandles (and sockets, see L<AnyEvent::Socket> for an easy way to make	51	filehandles. For utility functions for doing non-blocking connects and accepts
49	non-blocking resolves and connects).	52	on sockets see L<AnyEvent::Util>.
50		53
51	In the following, when the documentation refers to of "bytes" then this	54	In the following, when the documentation refers to of "bytes" then this
52	means characters. As sysread and syswrite are used for all I/O, their	55	means characters. As sysread and syswrite are used for all I/O, their
53	treatment of characters applies to this module as well.	56	treatment of characters applies to this module as well.
54		57
…		…
70	The filehandle this L<AnyEvent::Handle> object will operate on.	73	The filehandle this L<AnyEvent::Handle> object will operate on.
71		74
72	NOTE: The filehandle will be set to non-blocking (using	75	NOTE: The filehandle will be set to non-blocking (using
73	AnyEvent::Util::fh_nonblocking).	76	AnyEvent::Util::fh_nonblocking).
74		77
75	=item on_error => $cb->($self) [MANDATORY]	78	=item on_eof => $cb->($handle)
76		79
77	This is the fatal error callback, that is called when a fatal error ocurs,	80	Set the callback to be called when an end-of-file condition is detcted,
		81	i.e. in the case of a socket, when the other side has closed the
		82	connection cleanly.
		83
		84	While not mandatory, it is highly recommended to set an eof callback,
		85	otherwise you might end up with a closed socket while you are still
		86	waiting for data.
		87
		88	=item on_error => $cb->($handle, $fatal)
		89
		90	This is the error callback, which is called when, well, some error
78	such as not being able to resolve the hostname, failure to connect or a	91	occured, such as not being able to resolve the hostname, failure to
79	read error.	92	connect or a read error.
80		93
81	The object will not be in a usable state when this callback has been	94	Some errors are fatal (which is indicated by C<$fatal> being true). On
82	called.	95	fatal errors the handle object will be shut down and will not be
		96	usable. Non-fatal errors can be retried by simply returning, but it is
		97	recommended to simply ignore this parameter and instead abondon the handle
		98	object when this callback is invoked.
83		99
84	On callback entrance, the value of C<$!> contains the opertaing system	100	On callback entrance, the value of C<$!> contains the operating system
85	error (or C<ENOSPC> or C<EPIPE>).	101	error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>).
86		102
87	=item on_eof => $cb->($self) [MANDATORY]	103	While not mandatory, it is I<highly> recommended to set this callback, as
		104	you will not be notified of errors otherwise. The default simply calls
		105	C<croak>.
88		106
89	Set the callback to be called on EOF.
90
91	=item on_read => $cb->($self)	107	=item on_read => $cb->($handle)
92		108
93	This sets the default read callback, which is called when data arrives	109	This sets the default read callback, which is called when data arrives
94	and no read request is in the queue. If the read callback is C<undef>	110	and no read request is in the queue.
95	or has never been set, than AnyEvent::Handle will cease reading from the
96	filehandle.
97		111
98	To access (and remove data from) the read buffer, use the C<< ->rbuf >>	112	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
99	method or acces sthe C<$self->{rbuf}> member directly.	113	method or access the C<$handle->{rbuf}> member directly.
100		114
101	When an EOF condition is detected then AnyEvent::Handle will first try to	115	When an EOF condition is detected then AnyEvent::Handle will first try to
102	feed all the remaining data to the queued callbacks and C<on_read> before	116	feed all the remaining data to the queued callbacks and C<on_read> before
103	calling the C<on_eof> callback. If no progress can be made, then a fatal	117	calling the C<on_eof> callback. If no progress can be made, then a fatal
104	error will be raised (with C<$!> set to C<EPIPE>).	118	error will be raised (with C<$!> set to C<EPIPE>).
105		119
106	=item on_drain => $cb->()	120	=item on_drain => $cb->($handle)
107		121
108	This sets the callback that is called when the write buffer becomes empty	122	This sets the callback that is called when the write buffer becomes empty
109	(or when the callback is set and the buffer is empty already).	123	(or when the callback is set and the buffer is empty already).
110		124
111	To append to the write buffer, use the C<< ->push_write >> method.	125	To append to the write buffer, use the C<< ->push_write >> method.
		126
		127	=item timeout => $fractional_seconds
		128
		129	If non-zero, then this enables an "inactivity" timeout: whenever this many
		130	seconds pass without a successful read or write on the underlying file
		131	handle, the C<on_timeout> callback will be invoked (and if that one is
		132	missing, an C<ETIMEDOUT> error will be raised).
		133
		134	Note that timeout processing is also active when you currently do not have
		135	any outstanding read or write requests: If you plan to keep the connection
		136	idle then you should disable the timout temporarily or ignore the timeout
		137	in the C<on_timeout> callback.
		138
		139	Zero (the default) disables this timeout.
		140
		141	=item on_timeout => $cb->($handle)
		142
		143	Called whenever the inactivity timeout passes. If you return from this
		144	callback, then the timeout will be reset as if some activity had happened,
		145	so this condition is not fatal in any way.
112		146
113	=item rbuf_max => <bytes>	147	=item rbuf_max => <bytes>
114		148
115	If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>)	149	If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>)
116	when the read buffer ever (strictly) exceeds this size. This is useful to	150	when the read buffer ever (strictly) exceeds this size. This is useful to
…		…
123	isn't finished).	157	isn't finished).
124		158
125	=item read_size => <bytes>	159	=item read_size => <bytes>
126		160
127	The default read block size (the amount of bytes this module will try to read	161	The default read block size (the amount of bytes this module will try to read
128	on each [loop iteration). Default: C<4096>.	162	during each (loop iteration). Default: C<8192>.
129		163
130	=item low_water_mark => <bytes>	164	=item low_water_mark => <bytes>
131		165
132	Sets the amount of bytes (default: C<0>) that make up an "empty" write	166	Sets the amount of bytes (default: C<0>) that make up an "empty" write
133	buffer: If the write reaches this size or gets even samller it is	167	buffer: If the write reaches this size or gets even samller it is
134	considered empty.	168	considered empty.
135		169
		170	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
		171
		172	When this parameter is given, it enables TLS (SSL) mode, that means it
		173	will start making tls handshake and will transparently encrypt/decrypt
		174	data.
		175
		176	TLS mode requires Net::SSLeay to be installed (it will be loaded
		177	automatically when you try to create a TLS handle).
		178
		179	For the TLS server side, use C<accept>, and for the TLS client side of a
		180	connection, use C<connect> mode.
		181
		182	You can also provide your own TLS connection object, but you have
		183	to make sure that you call either C<Net::SSLeay::set_connect_state>
		184	or C<Net::SSLeay::set_accept_state> on it before you pass it to
		185	AnyEvent::Handle.
		186
		187	See the C<starttls> method if you need to start TLs negotiation later.
		188
		189	=item tls_ctx => $ssl_ctx
		190
		191	Use the given Net::SSLeay::CTX object to create the new TLS connection
		192	(unless a connection object was specified directly). If this parameter is
		193	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.
		194
		195	=item json => JSON or JSON::XS object
		196
		197	This is the json coder object used by the C<json> read and write types.
		198
		199	If you don't supply it, then AnyEvent::Handle will create and use a
		200	suitable one, which will write and expect UTF-8 encoded JSON texts.
		201
		202	Note that you are responsible to depend on the JSON module if you want to
		203	use this functionality, as AnyEvent does not have a dependency itself.
		204
		205	=item filter_r => $cb
		206
		207	=item filter_w => $cb
		208
		209	These exist, but are undocumented at this time.
		210
136	=back	211	=back
137		212
138	=cut	213	=cut
139		214
140	sub new {	215	sub new {
…		…
144		219
145	$self->{fh} or Carp::croak "mandatory argument fh is missing";	220	$self->{fh} or Carp::croak "mandatory argument fh is missing";
146		221
147	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;	222	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;
148		223
149	$self->on_error ((delete $self->{on_error}) or Carp::croak "mandatory argument on_error is missing");	224	if ($self->{tls}) {
150	$self->on_eof ((delete $self->{on_eof} ) or Carp::croak "mandatory argument on_eof is missing");	225	require Net::SSLeay;
		226	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx});
		227	}
		228
		229	$self->{_activity} = AnyEvent->now;
		230	$self->_timeout;
151		231
152	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};	232	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};
153	$self->on_read (delete $self->{on_read} ) if $self->{on_read};	233	$self->on_read (delete $self->{on_read} ) if $self->{on_read};
154		234
155	$self	235	$self
156	}	236	}
157		237
158	sub _shutdown {	238	sub _shutdown {
159	my ($self) = @_;	239	my ($self) = @_;
160		240
		241	delete $self->{_tw};
161	delete $self->{rw};	242	delete $self->{_rw};
162	delete $self->{ww};	243	delete $self->{_ww};
163	delete $self->{fh};	244	delete $self->{fh};
164	}
165		245
		246	$self->stoptls;
		247	}
		248
166	sub error {	249	sub _error {
167	my ($self) = @_;	250	my ($self, $errno, $fatal) = @_;
168		251
169	{
170	local $!;
171	$self->_shutdown;	252	$self->_shutdown
172	}	253	if $fatal;
173		254
		255	$! = $errno;
		256
		257	if ($self->{on_error}) {
174	$self->{on_error}($self);	258	$self->{on_error}($self, $fatal);
		259	} else {
		260	Carp::croak "AnyEvent::Handle uncaught error: $!";
		261	}
175	}	262	}
176		263
177	=item $fh = $handle->fh	264	=item $fh = $handle->fh
178		265
179	This method returns the filehandle of the L<AnyEvent::Handle> object.	266	This method returns the file handle of the L<AnyEvent::Handle> object.
180		267
181	=cut	268	=cut
182		269
183	sub fh { $_[0]->{fh} }	270	sub fh { $_[0]{fh} }
184		271
185	=item $handle->on_error ($cb)	272	=item $handle->on_error ($cb)
186		273
187	Replace the current C<on_error> callback (see the C<on_error> constructor argument).	274	Replace the current C<on_error> callback (see the C<on_error> constructor argument).
188		275
…		…
200		287
201	sub on_eof {	288	sub on_eof {
202	$_[0]{on_eof} = $_[1];	289	$_[0]{on_eof} = $_[1];
203	}	290	}
204		291
		292	=item $handle->on_timeout ($cb)
		293
		294	Replace the current C<on_timeout> callback, or disables the callback
		295	(but not the timeout) if C<$cb> = C<undef>. See C<timeout> constructor
		296	argument.
		297
		298	=cut
		299
		300	sub on_timeout {
		301	$_[0]{on_timeout} = $_[1];
		302	}
		303
		304	#############################################################################
		305
		306	=item $handle->timeout ($seconds)
		307
		308	Configures (or disables) the inactivity timeout.
		309
		310	=cut
		311
		312	sub timeout {
		313	my ($self, $timeout) = @_;
		314
		315	$self->{timeout} = $timeout;
		316	$self->_timeout;
		317	}
		318
		319	# reset the timeout watcher, as neccessary
		320	# also check for time-outs
		321	sub _timeout {
		322	my ($self) = @_;
		323
		324	if ($self->{timeout}) {
		325	my $NOW = AnyEvent->now;
		326
		327	# when would the timeout trigger?
		328	my $after = $self->{_activity} + $self->{timeout} - $NOW;
		329
		330	# now or in the past already?
		331	if ($after <= 0) {
		332	$self->{_activity} = $NOW;
		333
		334	if ($self->{on_timeout}) {
		335	$self->{on_timeout}($self);
		336	} else {
		337	$self->_error (&Errno::ETIMEDOUT);
		338	}
		339
		340	# callback could have changed timeout value, optimise
		341	return unless $self->{timeout};
		342
		343	# calculate new after
		344	$after = $self->{timeout};
		345	}
		346
		347	Scalar::Util::weaken $self;
		348	return unless $self; # ->error could have destroyed $self
		349
		350	$self->{_tw} \|\|= AnyEvent->timer (after => $after, cb => sub {
		351	delete $self->{_tw};
		352	$self->_timeout;
		353	});
		354	} else {
		355	delete $self->{_tw};
		356	}
		357	}
		358
205	#############################################################################	359	#############################################################################
206		360
207	=back	361	=back
208		362
209	=head2 WRITE QUEUE	363	=head2 WRITE QUEUE
…		…
212	for reading.	366	for reading.
213		367
214	The write queue is very simple: you can add data to its end, and	368	The write queue is very simple: you can add data to its end, and
215	AnyEvent::Handle will automatically try to get rid of it for you.	369	AnyEvent::Handle will automatically try to get rid of it for you.
216		370
217	When data could be writtena nd the write buffer is shorter then the low	371	When data could be written and the write buffer is shorter then the low
218	water mark, the C<on_drain> callback will be invoked.	372	water mark, the C<on_drain> callback will be invoked.
219		373
220	=over 4	374	=over 4
221		375
222	=item $handle->on_drain ($cb)	376	=item $handle->on_drain ($cb)
…		…
241	want (only limited by the available memory), as C<AnyEvent::Handle>	395	want (only limited by the available memory), as C<AnyEvent::Handle>
242	buffers it independently of the kernel.	396	buffers it independently of the kernel.
243		397
244	=cut	398	=cut
245		399
246	sub push_write {	400	sub _drain_wbuf {
247	my ($self, $data) = @_;	401	my ($self) = @_;
248		402
249	$self->{wbuf} .= $data;	403	if (!$self->{_ww} && length $self->{wbuf}) {
250		404
251	unless ($self->{ww}) {
252	Scalar::Util::weaken $self;	405	Scalar::Util::weaken $self;
		406
253	my $cb = sub {	407	my $cb = sub {
254	my $len = syswrite $self->{fh}, $self->{wbuf};	408	my $len = syswrite $self->{fh}, $self->{wbuf};
255		409
256	if ($len > 0) {	410	if ($len >= 0) {
257	substr $self->{wbuf}, 0, $len, "";	411	substr $self->{wbuf}, 0, $len, "";
258		412
		413	$self->{_activity} = AnyEvent->now;
259		414
260	$self->{on_drain}($self)	415	$self->{on_drain}($self)
261	if $self->{low_water_mark} >= length $self->{wbuf}	416	if $self->{low_water_mark} >= length $self->{wbuf}
262	&& $self->{on_drain};	417	&& $self->{on_drain};
263		418
264	delete $self->{ww} unless length $self->{wbuf};	419	delete $self->{_ww} unless length $self->{wbuf};
265	} elsif ($! != EAGAIN && $! != EINTR) {	420	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
266	$self->error;	421	$self->_error ($!, 1);
267	}	422	}
268	};	423	};
269		424
		425	# try to write data immediately
		426	$cb->();
		427
		428	# if still data left in wbuf, we need to poll
270	$self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb);	429	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)
271		430	if length $self->{wbuf};
272	$cb->($self);
273	};	431	};
274	}	432	}
		433
		434	our %WH;
		435
		436	sub register_write_type($$) {
		437	$WH{$_[0]} = $_[1];
		438	}
		439
		440	sub push_write {
		441	my $self = shift;
		442
		443	if (@_ > 1) {
		444	my $type = shift;
		445
		446	@_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write")
		447	->($self, @_);
		448	}
		449
		450	if ($self->{filter_w}) {
		451	$self->{filter_w}($self, \$_[0]);
		452	} else {
		453	$self->{wbuf} .= $_[0];
		454	$self->_drain_wbuf;
		455	}
		456	}
		457
		458	=item $handle->push_write (type => @args)
		459
		460	Instead of formatting your data yourself, you can also let this module do
		461	the job by specifying a type and type-specific arguments.
		462
		463	Predefined types are (if you have ideas for additional types, feel free to
		464	drop by and tell us):
		465
		466	=over 4
		467
		468	=item netstring => $string
		469
		470	Formats the given value as netstring
		471	(http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them).
		472
		473	=cut
		474
		475	register_write_type netstring => sub {
		476	my ($self, $string) = @_;
		477
		478	sprintf "%d:%s,", (length $string), $string
		479	};
		480
		481	=item json => $array_or_hashref
		482
		483	Encodes the given hash or array reference into a JSON object. Unless you
		484	provide your own JSON object, this means it will be encoded to JSON text
		485	in UTF-8.
		486
		487	JSON objects (and arrays) are self-delimiting, so you can write JSON at
		488	one end of a handle and read them at the other end without using any
		489	additional framing.
		490
		491	The generated JSON text is guaranteed not to contain any newlines: While
		492	this module doesn't need delimiters after or between JSON texts to be
		493	able to read them, many other languages depend on that.
		494
		495	A simple RPC protocol that interoperates easily with others is to send
		496	JSON arrays (or objects, although arrays are usually the better choice as
		497	they mimic how function argument passing works) and a newline after each
		498	JSON text:
		499
		500	$handle->push_write (json => ["method", "arg1", "arg2"]); # whatever
		501	$handle->push_write ("\012");
		502
		503	An AnyEvent::Handle receiver would simply use the C<json> read type and
		504	rely on the fact that the newline will be skipped as leading whitespace:
		505
		506	$handle->push_read (json => sub { my $array = $_[1]; ... });
		507
		508	Other languages could read single lines terminated by a newline and pass
		509	this line into their JSON decoder of choice.
		510
		511	=cut
		512
		513	register_write_type json => sub {
		514	my ($self, $ref) = @_;
		515
		516	require JSON;
		517
		518	$self->{json} ? $self->{json}->encode ($ref)
		519	: JSON::encode_json ($ref)
		520	};
		521
		522	=back
		523
		524	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
		525
		526	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
		528	reference with the handle object and the remaining arguments.
		529
		530	The code reference is supposed to return a single octet string that will
		531	be appended to the write buffer.
		532
		533	Note that this is a function, and all types registered this way will be
		534	global, so try to use unique names.
		535
		536	=cut
275		537
276	#############################################################################	538	#############################################################################
277		539
278	=back	540	=back
279		541
…		…
303	the specified number of bytes which give an XML datagram.	565	the specified number of bytes which give an XML datagram.
304		566
305	# in the default state, expect some header bytes	567	# in the default state, expect some header bytes
306	$handle->on_read (sub {	568	$handle->on_read (sub {
307	# some data is here, now queue the length-header-read (4 octets)	569	# some data is here, now queue the length-header-read (4 octets)
308	shift->unshift_read_chunk (4, sub {	570	shift->unshift_read (chunk => 4, sub {
309	# header arrived, decode	571	# header arrived, decode
310	my $len = unpack "N", $_[1];	572	my $len = unpack "N", $_[1];
311		573
312	# now read the payload	574	# now read the payload
313	shift->unshift_read_chunk ($len, sub {	575	shift->unshift_read (chunk => $len, sub {
314	my $xml = $_[1];	576	my $xml = $_[1];
315	# handle xml	577	# handle xml
316	});	578	});
317	});	579	});
318	});	580	});
…		…
325		587
326	# request one	588	# request one
327	$handle->push_write ("request 1\015\012");	589	$handle->push_write ("request 1\015\012");
328		590
329	# we expect "ERROR" or "OK" as response, so push a line read	591	# we expect "ERROR" or "OK" as response, so push a line read
330	$handle->push_read_line (sub {	592	$handle->push_read (line => sub {
331	# if we got an "OK", we have to _prepend_ another line,	593	# if we got an "OK", we have to _prepend_ another line,
332	# so it will be read before the second request reads its 64 bytes	594	# so it will be read before the second request reads its 64 bytes
333	# which are already in the queue when this callback is called	595	# which are already in the queue when this callback is called
334	# we don't do this in case we got an error	596	# we don't do this in case we got an error
335	if ($_[1] eq "OK") {	597	if ($_[1] eq "OK") {
336	$_[0]->unshift_read_line (sub {	598	$_[0]->unshift_read (line => sub {
337	my $response = $_[1];	599	my $response = $_[1];
338	...	600	...
339	});	601	});
340	}	602	}
341	});	603	});
342		604
343	# request two	605	# request two
344	$handle->push_write ("request 2\015\012");	606	$handle->push_write ("request 2\015\012");
345		607
346	# simply read 64 bytes, always	608	# simply read 64 bytes, always
347	$handle->push_read_chunk (64, sub {	609	$handle->push_read (chunk => 64, sub {
348	my $response = $_[1];	610	my $response = $_[1];
349	...	611	...
350	});	612	});
351		613
352	=over 4	614	=over 4
353		615
		616	=cut
		617
354	sub _drain_rbuf {	618	sub _drain_rbuf {
355	my ($self) = @_;	619	my ($self) = @_;
356		620
357	return if exists $self->{in_drain};
358	local $self->{in_drain} = 1;	621	local $self->{_in_drain} = 1;
359		622
360	while (my $len = length $self->{rbuf}) {	623	if (
		624	defined $self->{rbuf_max}
		625	&& $self->{rbuf_max} < length $self->{rbuf}
		626	) {
		627	return $self->_error (&Errno::ENOSPC, 1);
		628	}
		629
		630	while () {
361	no strict 'refs';	631	no strict 'refs';
		632
		633	my $len = length $self->{rbuf};
		634
362	if (@{ $self->{queue} }) {	635	if (my $cb = shift @{ $self->{_queue} }) {
363	if ($self->{queue}[0]($self)) {	636	unless ($cb->($self)) {
364	shift @{ $self->{queue} };
365	} elsif ($self->{eof}) {	637	if ($self->{_eof}) {
366	# no progress can be made (not enough data and no data forthcoming)	638	# no progress can be made (not enough data and no data forthcoming)
367	$! = &Errno::EPIPE; return $self->error;	639	return $self->_error (&Errno::EPIPE, 1);
368	} else {	640	}
		641
		642	unshift @{ $self->{_queue} }, $cb;
369	return;	643	last;
370	}	644	}
371	} elsif ($self->{on_read}) {	645	} elsif ($self->{on_read}) {
372	$self->{on_read}($self);	646	$self->{on_read}($self);
373		647
374	if (	648	if (
375	$self->{eof} # if no further data will arrive
376	&& $len == length $self->{rbuf} # and no data has been consumed	649	$len == length $self->{rbuf} # if no data has been consumed
377	&& !@{ $self->{queue} } # and the queue is still empty	650	&& !@{ $self->{_queue} } # and the queue is still empty
378	&& $self->{on_read} # and we still want to read data	651	&& $self->{on_read} # but we still have on_read
379	) {	652	) {
		653	# no further data will arrive
380	# then no progress can be made	654	# so no progress can be made
381	$! = &Errno::EPIPE; return $self->error;	655	return $self->_error (&Errno::EPIPE, 1)
		656	if $self->{_eof};
		657
		658	last; # more data might arrive
382	}	659	}
383	} else {	660	} else {
384	# read side becomes idle	661	# read side becomes idle
385	delete $self->{rw};	662	delete $self->{_rw};
386	return;	663	last;
387	}	664	}
388	}	665	}
389		666
390	if ($self->{eof}) {
391	$self->_shutdown;
392	$self->{on_eof}($self);	667	$self->{on_eof}($self)
		668	if $self->{_eof} && $self->{on_eof};
		669
		670	# may need to restart read watcher
		671	unless ($self->{_rw}) {
		672	$self->start_read
		673	if $self->{on_read} \|\| @{ $self->{_queue} };
393	}	674	}
394	}	675	}
395		676
396	=item $handle->on_read ($cb)	677	=item $handle->on_read ($cb)
397		678
…		…
403		684
404	sub on_read {	685	sub on_read {
405	my ($self, $cb) = @_;	686	my ($self, $cb) = @_;
406		687
407	$self->{on_read} = $cb;	688	$self->{on_read} = $cb;
408		689	$self->_drain_rbuf if $cb && !$self->{_in_drain};
409	unless ($self->{rw} \|\| $self->{eof}) {
410	Scalar::Util::weaken $self;
411
412	$self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {
413	my $len = sysread $self->{fh}, $self->{rbuf}, $self->{read_size} \|\| 8192, length $self->{rbuf};
414
415	if ($len > 0) {
416	if (exists $self->{rbuf_max}) {
417	if ($self->{rbuf_max} < length $self->{rbuf}) {
418	$! = &Errno::ENOSPC; return $self->error;
419	}
420	}
421
422	} elsif (defined $len) {
423	$self->{eof} = 1;
424	delete $self->{rw};
425
426	} elsif ($! != EAGAIN && $! != EINTR) {
427	return $self->error;
428	}
429
430	$self->_drain_rbuf;
431	});
432	}
433	}	690	}
434		691
435	=item $handle->rbuf	692	=item $handle->rbuf
436		693
437	Returns the read buffer (as a modifiable lvalue).	694	Returns the read buffer (as a modifiable lvalue).
…		…
456	Append the given callback to the end of the queue (C<push_read>) or	713	Append the given callback to the end of the queue (C<push_read>) or
457	prepend it (C<unshift_read>).	714	prepend it (C<unshift_read>).
458		715
459	The callback is called each time some additional read data arrives.	716	The callback is called each time some additional read data arrives.
460		717
461	It must check wether enough data is in the read buffer already.	718	It must check whether enough data is in the read buffer already.
462		719
463	If not enough data is available, it must return the empty list or a false	720	If not enough data is available, it must return the empty list or a false
464	value, in which case it will be called repeatedly until enough data is	721	value, in which case it will be called repeatedly until enough data is
465	available (or an error condition is detected).	722	available (or an error condition is detected).
466		723
…		…
468	interested in (which can be none at all) and return a true value. After returning	725	interested in (which can be none at all) and return a true value. After returning
469	true, it will be removed from the queue.	726	true, it will be removed from the queue.
470		727
471	=cut	728	=cut
472		729
		730	our %RH;
		731
		732	sub register_read_type($$) {
		733	$RH{$_[0]} = $_[1];
		734	}
		735
473	sub push_read {	736	sub push_read {
474	my ($self, $cb) = @_;	737	my $self = shift;
		738	my $cb = pop;
475		739
		740	if (@_) {
		741	my $type = shift;
		742
		743	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
		744	->($self, $cb, @_);
		745	}
		746
476	push @{ $self->{queue} }, $cb;	747	push @{ $self->{_queue} }, $cb;
477	$self->_drain_rbuf;	748	$self->_drain_rbuf unless $self->{_in_drain};
478	}	749	}
479		750
480	sub unshift_read {	751	sub unshift_read {
481	my ($self, $cb) = @_;	752	my $self = shift;
		753	my $cb = pop;
482		754
		755	if (@_) {
		756	my $type = shift;
		757
		758	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read")
		759	->($self, $cb, @_);
		760	}
		761
		762
483	push @{ $self->{queue} }, $cb;	763	unshift @{ $self->{_queue} }, $cb;
484	$self->_drain_rbuf;	764	$self->_drain_rbuf unless $self->{_in_drain};
485	}	765	}
486		766
487	=item $handle->push_read_chunk ($len, $cb->($self, $data))	767	=item $handle->push_read (type => @args, $cb)
488		768
489	=item $handle->unshift_read_chunk ($len, $cb->($self, $data))	769	=item $handle->unshift_read (type => @args, $cb)
490		770
491	Append the given callback to the end of the queue (C<push_read_chunk>) or	771	Instead of providing a callback that parses the data itself you can chose
492	prepend it (C<unshift_read_chunk>).	772	between a number of predefined parsing formats, for chunks of data, lines
		773	etc.
493		774
494	The callback will be called only once C<$len> bytes have been read, and	775	Predefined types are (if you have ideas for additional types, feel free to
495	these C<$len> bytes will be passed to the callback.	776	drop by and tell us):
496		777
497	=cut	778	=over 4
498		779
499	sub _read_chunk($$) {	780	=item chunk => $octets, $cb->($handle, $data)
500	my ($len, $cb) = @_;	781
		782	Invoke the callback only once C<$octets> bytes have been read. Pass the
		783	data read to the callback. The callback will never be called with less
		784	data.
		785
		786	Example: read 2 bytes.
		787
		788	$handle->push_read (chunk => 2, sub {
		789	warn "yay ", unpack "H*", $_[1];
		790	});
		791
		792	=cut
		793
		794	register_read_type chunk => sub {
		795	my ($self, $cb, $len) = @_;
501		796
502	sub {	797	sub {
503	$len <= length $_[0]{rbuf} or return;	798	$len <= length $_[0]{rbuf} or return;
504	$cb->($_[0], substr $_[0]{rbuf}, 0, $len, "");	799	$cb->($_[0], substr $_[0]{rbuf}, 0, $len, "");
505	1	800	1
506	}	801	}
507	}	802	};
508		803
		804	# compatibility with older API
509	sub push_read_chunk {	805	sub push_read_chunk {
510	my ($self, $len, $cb) = @_;	806	$_[0]->push_read (chunk => $_[1], $_[2]);
511
512	$self->push_read (_read_chunk $len, $cb);
513	}	807	}
514
515		808
516	sub unshift_read_chunk {	809	sub unshift_read_chunk {
517	my ($self, $len, $cb) = @_;	810	$_[0]->unshift_read (chunk => $_[1], $_[2]);
518
519	$self->unshift_read (_read_chunk $len, $cb);
520	}	811	}
521		812
522	=item $handle->push_read_line ([$eol, ]$cb->($self, $line, $eol))	813	=item line => [$eol, ]$cb->($handle, $line, $eol)
523
524	=item $handle->unshift_read_line ([$eol, ]$cb->($self, $line, $eol))
525
526	Append the given callback to the end of the queue (C<push_read_line>) or
527	prepend it (C<unshift_read_line>).
528		814
529	The callback will be called only once a full line (including the end of	815	The callback will be called only once a full line (including the end of
530	line marker, C<$eol>) has been read. This line (excluding the end of line	816	line marker, C<$eol>) has been read. This line (excluding the end of line
531	marker) will be passed to the callback as second argument (C<$line>), and	817	marker) will be passed to the callback as second argument (C<$line>), and
532	the end of line marker as the third argument (C<$eol>).	818	the end of line marker as the third argument (C<$eol>).
…		…
543	Partial lines at the end of the stream will never be returned, as they are	829	Partial lines at the end of the stream will never be returned, as they are
544	not marked by the end of line marker.	830	not marked by the end of line marker.
545		831
546	=cut	832	=cut
547		833
548	sub _read_line($$) {	834	register_read_type line => sub {
549	my $cb = pop;	835	my ($self, $cb, $eol) = @_;
550	my $eol = @_ ? shift : qr\|(\015?\012)\|;
551	my $pos;
552		836
		837	$eol = qr\|(\015?\012)\| if @_ < 3;
553	$eol = qr\|(\Q$eol\E)\| unless ref $eol;	838	$eol = quotemeta $eol unless ref $eol;
554	$eol = qr\|^(.*?)($eol)\|;	839	$eol = qr\|^(.*?)($eol)\|s;
555		840
556	sub {	841	sub {
557	$_[0]{rbuf} =~ s/$eol// or return;	842	$_[0]{rbuf} =~ s/$eol// or return;
558		843
559	$cb->($1, $2);	844	$cb->($_[0], $1, $2);
560	1	845	1
561	}	846	}
562	}	847	};
563		848
		849	# compatibility with older API
564	sub push_read_line {	850	sub push_read_line {
565	my $self = shift;	851	my $self = shift;
566
567	$self->push_read (&_read_line);	852	$self->push_read (line => @_);
568	}	853	}
569		854
570	sub unshift_read_line {	855	sub unshift_read_line {
571	my $self = shift;	856	my $self = shift;
572
573	$self->unshift_read (&_read_line);	857	$self->unshift_read (line => @_);
574	}	858	}
		859
		860	=item netstring => $cb->($handle, $string)
		861
		862	A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement).
		863
		864	Throws an error with C<$!> set to EBADMSG on format violations.
		865
		866	=cut
		867
		868	register_read_type netstring => sub {
		869	my ($self, $cb) = @_;
		870
		871	sub {
		872	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {
		873	if ($_[0]{rbuf} =~ /[^0-9]/) {
		874	$self->_error (&Errno::EBADMSG);
		875	}
		876	return;
		877	}
		878
		879	my $len = $1;
		880
		881	$self->unshift_read (chunk => $len, sub {
		882	my $string = $_[1];
		883	$_[0]->unshift_read (chunk => 1, sub {
		884	if ($_[1] eq ",") {
		885	$cb->($_[0], $string);
		886	} else {
		887	$self->_error (&Errno::EBADMSG);
		888	}
		889	});
		890	});
		891
		892	1
		893	}
		894	};
		895
		896	=item regex => $accept[, $reject[, $skip], $cb->($handle, $data)
		897
		898	Makes a regex match against the regex object C<$accept> and returns
		899	everything up to and including the match.
		900
		901	Example: read a single line terminated by '\n'.
		902
		903	$handle->push_read (regex => qr<\n>, sub { ... });
		904
		905	If C<$reject> is given and not undef, then it determines when the data is
		906	to be rejected: it is matched against the data when the C<$accept> regex
		907	does not match and generates an C<EBADMSG> error when it matches. This is
		908	useful to quickly reject wrong data (to avoid waiting for a timeout or a
		909	receive buffer overflow).
		910
		911	Example: expect a single decimal number followed by whitespace, reject
		912	anything else (not the use of an anchor).
		913
		914	$handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... });
		915
		916	If C<$skip> is given and not C<undef>, then it will be matched against
		917	the receive buffer when neither C<$accept> nor C<$reject> match,
		918	and everything preceding and including the match will be accepted
		919	unconditionally. This is useful to skip large amounts of data that you
		920	know cannot be matched, so that the C<$accept> or C<$reject> regex do not
		921	have to start matching from the beginning. This is purely an optimisation
		922	and is usually worth only when you expect more than a few kilobytes.
		923
		924	Example: expect a http header, which ends at C<\015\012\015\012>. Since we
		925	expect the header to be very large (it isn't in practise, but...), we use
		926	a skip regex to skip initial portions. The skip regex is tricky in that
		927	it only accepts something not ending in either \015 or \012, as these are
		928	required for the accept regex.
		929
		930	$handle->push_read (regex =>
		931	qr<\015\012\015\012>,
		932	undef, # no reject
		933	qr<^.*[^\015\012]>,
		934	sub { ... });
		935
		936	=cut
		937
		938	register_read_type regex => sub {
		939	my ($self, $cb, $accept, $reject, $skip) = @_;
		940
		941	my $data;
		942	my $rbuf = \$self->{rbuf};
		943
		944	sub {
		945	# accept
		946	if ($$rbuf =~ $accept) {
		947	$data .= substr $$rbuf, 0, $+[0], "";
		948	$cb->($self, $data);
		949	return 1;
		950	}
		951
		952	# reject
		953	if ($reject && $$rbuf =~ $reject) {
		954	$self->_error (&Errno::EBADMSG);
		955	}
		956
		957	# skip
		958	if ($skip && $$rbuf =~ $skip) {
		959	$data .= substr $$rbuf, 0, $+[0], "";
		960	}
		961
		962	()
		963	}
		964	};
		965
		966	=item json => $cb->($handle, $hash_or_arrayref)
		967
		968	Reads a JSON object or array, decodes it and passes it to the callback.
		969
		970	If a C<json> object was passed to the constructor, then that will be used
		971	for the final decode, otherwise it will create a JSON coder expecting UTF-8.
		972
		973	This read type uses the incremental parser available with JSON version
		974	2.09 (and JSON::XS version 2.2) and above. You have to provide a
		975	dependency on your own: this module will load the JSON module, but
		976	AnyEvent does not depend on it itself.
		977
		978	Since JSON texts are fully self-delimiting, the C<json> read and write
		979	types are an ideal simple RPC protocol: just exchange JSON datagrams. See
		980	the C<json> write type description, above, for an actual example.
		981
		982	=cut
		983
		984	register_read_type json => sub {
		985	my ($self, $cb, $accept, $reject, $skip) = @_;
		986
		987	require JSON;
		988
		989	my $data;
		990	my $rbuf = \$self->{rbuf};
		991
		992	my $json = $self->{json} \|\|= JSON->new->utf8;
		993
		994	sub {
		995	my $ref = $json->incr_parse ($self->{rbuf});
		996
		997	if ($ref) {
		998	$self->{rbuf} = $json->incr_text;
		999	$json->incr_text = "";
		1000	$cb->($self, $ref);
		1001
		1002	1
		1003	} else {
		1004	$self->{rbuf} = "";
		1005	()
		1006	}
		1007	}
		1008	};
575		1009
576	=back	1010	=back
577		1011
		1012	=item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args)
		1013
		1014	This function (not method) lets you add your own types to C<push_read>.
		1015
		1016	Whenever the given C<type> is used, C<push_read> will invoke the code
		1017	reference with the handle object, the callback and the remaining
		1018	arguments.
		1019
		1020	The code reference is supposed to return a callback (usually a closure)
		1021	that works as a plain read callback (see C<< ->push_read ($cb) >>).
		1022
		1023	It should invoke the passed callback when it is done reading (remember to
		1024	pass C<$handle> as first argument as all other callbacks do that).
		1025
		1026	Note that this is a function, and all types registered this way will be
		1027	global, so try to use unique names.
		1028
		1029	For examples, see the source of this module (F<perldoc -m AnyEvent::Handle>,
		1030	search for C<register_read_type>)).
		1031
		1032	=item $handle->stop_read
		1033
		1034	=item $handle->start_read
		1035
		1036	In rare cases you actually do not want to read anything from the
		1037	socket. In this case you can call C<stop_read>. Neither C<on_read> nor
		1038	any queued callbacks will be executed then. To start reading again, call
		1039	C<start_read>.
		1040
		1041	Note that AnyEvent::Handle will automatically C<start_read> for you when
		1042	you change the C<on_read> callback or push/unshift a read callback, and it
		1043	will automatically C<stop_read> for you when neither C<on_read> is set nor
		1044	there are any read requests in the queue.
		1045
		1046	=cut
		1047
		1048	sub stop_read {
		1049	my ($self) = @_;
		1050
		1051	delete $self->{_rw};
		1052	}
		1053
		1054	sub start_read {
		1055	my ($self) = @_;
		1056
		1057	unless ($self->{_rw} \|\| $self->{_eof}) {
		1058	Scalar::Util::weaken $self;
		1059
		1060	$self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {
		1061	my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf};
		1062	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} \|\| 8192, length $$rbuf;
		1063
		1064	if ($len > 0) {
		1065	$self->{_activity} = AnyEvent->now;
		1066
		1067	$self->{filter_r}
		1068	? $self->{filter_r}($self, $rbuf)
		1069	: $self->{_in_drain} \|\| $self->_drain_rbuf;
		1070
		1071	} elsif (defined $len) {
		1072	delete $self->{_rw};
		1073	$self->{_eof} = 1;
		1074	$self->_drain_rbuf unless $self->{_in_drain};
		1075
		1076	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
		1077	return $self->_error ($!, 1);
		1078	}
		1079	});
		1080	}
		1081	}
		1082
		1083	sub _dotls {
		1084	my ($self) = @_;
		1085
		1086	my $buf;
		1087
		1088	if (length $self->{_tls_wbuf}) {
		1089	while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
		1090	substr $self->{_tls_wbuf}, 0, $len, "";
		1091	}
		1092	}
		1093
		1094	if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) {
		1095	$self->{wbuf} .= $buf;
		1096	$self->_drain_wbuf;
		1097	}
		1098
		1099	while (defined ($buf = Net::SSLeay::read ($self->{tls}))) {
		1100	if (length $buf) {
		1101	$self->{rbuf} .= $buf;
		1102	$self->_drain_rbuf unless $self->{_in_drain};
		1103	} else {
		1104	# let's treat SSL-eof as we treat normal EOF
		1105	$self->{_eof} = 1;
		1106	$self->_shutdown;
		1107	return;
		1108	}
		1109	}
		1110
		1111	my $err = Net::SSLeay::get_error ($self->{tls}, -1);
		1112
		1113	if ($err!= Net::SSLeay::ERROR_WANT_READ ()) {
		1114	if ($err == Net::SSLeay::ERROR_SYSCALL ()) {
		1115	return $self->_error ($!, 1);
		1116	} elsif ($err == Net::SSLeay::ERROR_SSL ()) {
		1117	return $self->_error (&Errno::EIO, 1);
		1118	}
		1119
		1120	# all others are fine for our purposes
		1121	}
		1122	}
		1123
		1124	=item $handle->starttls ($tls[, $tls_ctx])
		1125
		1126	Instead of starting TLS negotiation immediately when the AnyEvent::Handle
		1127	object is created, you can also do that at a later time by calling
		1128	C<starttls>.
		1129
		1130	The first argument is the same as the C<tls> constructor argument (either
		1131	C<"connect">, C<"accept"> or an existing Net::SSLeay object).
		1132
		1133	The second argument is the optional C<Net::SSLeay::CTX> object that is
		1134	used when AnyEvent::Handle has to create its own TLS connection object.
		1135
		1136	The TLS connection object will end up in C<< $handle->{tls} >> after this
		1137	call and can be used or changed to your liking. Note that the handshake
		1138	might have already started when this function returns.
		1139
		1140	=cut
		1141
		1142	sub starttls {
		1143	my ($self, $ssl, $ctx) = @_;
		1144
		1145	$self->stoptls;
		1146
		1147	if ($ssl eq "accept") {
		1148	$ssl = Net::SSLeay::new ($ctx \|\| TLS_CTX ());
		1149	Net::SSLeay::set_accept_state ($ssl);
		1150	} elsif ($ssl eq "connect") {
		1151	$ssl = Net::SSLeay::new ($ctx \|\| TLS_CTX ());
		1152	Net::SSLeay::set_connect_state ($ssl);
		1153	}
		1154
		1155	$self->{tls} = $ssl;
		1156
		1157	# basically, this is deep magic (because SSL_read should have the same issues)
		1158	# but the openssl maintainers basically said: "trust us, it just works".
		1159	# (unfortunately, we have to hardcode constants because the abysmally misdesigned
		1160	# and mismaintained ssleay-module doesn't even offer them).
		1161	# http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html
		1162	Net::SSLeay::CTX_set_mode ($self->{tls},
		1163	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)
		1164	\| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));
		1165
		1166	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
		1167	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
		1168
		1169	Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});
		1170
		1171	$self->{filter_w} = sub {
		1172	$_[0]{_tls_wbuf} .= ${$_[1]};
		1173	&_dotls;
		1174	};
		1175	$self->{filter_r} = sub {
		1176	Net::SSLeay::BIO_write ($_[0]{_rbio}, ${$_[1]});
		1177	&_dotls;
		1178	};
		1179	}
		1180
		1181	=item $handle->stoptls
		1182
		1183	Destroys the SSL connection, if any. Partial read or write data will be
		1184	lost.
		1185
		1186	=cut
		1187
		1188	sub stoptls {
		1189	my ($self) = @_;
		1190
		1191	Net::SSLeay::free (delete $self->{tls}) if $self->{tls};
		1192
		1193	delete $self->{_rbio};
		1194	delete $self->{_wbio};
		1195	delete $self->{_tls_wbuf};
		1196	delete $self->{filter_r};
		1197	delete $self->{filter_w};
		1198	}
		1199
		1200	sub DESTROY {
		1201	my $self = shift;
		1202
		1203	$self->stoptls;
		1204	}
		1205
		1206	=item AnyEvent::Handle::TLS_CTX
		1207
		1208	This function creates and returns the Net::SSLeay::CTX object used by
		1209	default for TLS mode.
		1210
		1211	The context is created like this:
		1212
		1213	Net::SSLeay::load_error_strings;
		1214	Net::SSLeay::SSLeay_add_ssl_algorithms;
		1215	Net::SSLeay::randomize;
		1216
		1217	my $CTX = Net::SSLeay::CTX_new;
		1218
		1219	Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL
		1220
		1221	=cut
		1222
		1223	our $TLS_CTX;
		1224
		1225	sub TLS_CTX() {
		1226	$TLS_CTX \|\| do {
		1227	require Net::SSLeay;
		1228
		1229	Net::SSLeay::load_error_strings ();
		1230	Net::SSLeay::SSLeay_add_ssl_algorithms ();
		1231	Net::SSLeay::randomize ();
		1232
		1233	$TLS_CTX = Net::SSLeay::CTX_new ();
		1234
		1235	Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ());
		1236
		1237	$TLS_CTX
		1238	}
		1239	}
		1240
		1241	=back
		1242
		1243	=head1 SUBCLASSING AnyEvent::Handle
		1244
		1245	In many cases, you might want to subclass AnyEvent::Handle.
		1246
		1247	To make this easier, a given version of AnyEvent::Handle uses these
		1248	conventions:
		1249
		1250	=over 4
		1251
		1252	=item * all constructor arguments become object members.
		1253
		1254	At least initially, when you pass a C<tls>-argument to the constructor it
		1255	will end up in C<< $handle->{tls} >>. Those members might be changes or
		1256	mutated later on (for example C<tls> will hold the TLS connection object).
		1257
		1258	=item * other object member names are prefixed with an C<_>.
		1259
		1260	All object members not explicitly documented (internal use) are prefixed
		1261	with an underscore character, so the remaining non-C<_>-namespace is free
		1262	for use for subclasses.
		1263
		1264	=item * all members not documented here and not prefixed with an underscore
		1265	are free to use in subclasses.
		1266
		1267	Of course, new versions of AnyEvent::Handle may introduce more "public"
		1268	member variables, but thats just life, at least it is documented.
		1269
		1270	=back
		1271
578	=head1 AUTHOR	1272	=head1 AUTHOR
579		1273
580	Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>.	1274	Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>.
581		1275
582	=cut	1276	=cut

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.9 by root, Fri May 2 16:07:46 2008 UTC vs. Revision 1.60 by root, Thu Jun 5 18:30:08 2008 UTC

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.9 by root, Fri May 2 16:07:46 2008 UTC vs.
Revision 1.60 by root, Thu Jun 5 18:30:08 2008 UTC