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

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.55 by root, Tue Jun 3 16:15:30 2008 UTC vs.
Revision 1.86 by root, Thu Aug 21 20:41:16 2008 UTC

…		…
1	package AnyEvent::Handle;	1	package AnyEvent::Handle;
2		2
3	no warnings;	3	no warnings;
4	use strict;	4	use strict qw(subs vars);
5		5
6	use AnyEvent ();	6	use AnyEvent ();
7	use AnyEvent::Util qw(WSAEWOULDBLOCK);	7	use AnyEvent::Util qw(WSAEWOULDBLOCK);
8	use Scalar::Util ();	8	use Scalar::Util ();
9	use Carp ();	9	use Carp ();
14		14
15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent	15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16		16
17	=cut	17	=cut
18		18
19	our $VERSION = 4.12;	19	our $VERSION = 4.232;
20		20
21	=head1 SYNOPSIS	21	=head1 SYNOPSIS
22		22
23	use AnyEvent;	23	use AnyEvent;
24	use AnyEvent::Handle;	24	use AnyEvent::Handle;
…		…
49		49
50	This module is a helper module to make it easier to do event-based I/O on	50	This module is a helper module to make it easier to do event-based I/O on
51	filehandles. For utility functions for doing non-blocking connects and accepts	51	filehandles. For utility functions for doing non-blocking connects and accepts
52	on sockets see L<AnyEvent::Util>.	52	on sockets see L<AnyEvent::Util>.
53		53
		54	The L<AnyEvent::Intro> tutorial contains some well-documented
		55	AnyEvent::Handle examples.
		56
54	In the following, when the documentation refers to of "bytes" then this	57	In the following, when the documentation refers to of "bytes" then this
55	means characters. As sysread and syswrite are used for all I/O, their	58	means characters. As sysread and syswrite are used for all I/O, their
56	treatment of characters applies to this module as well.	59	treatment of characters applies to this module as well.
57		60
58	All callbacks will be invoked with the handle object as their first	61	All callbacks will be invoked with the handle object as their first
…		…
70		73
71	=item fh => $filehandle [MANDATORY]	74	=item fh => $filehandle [MANDATORY]
72		75
73	The filehandle this L<AnyEvent::Handle> object will operate on.	76	The filehandle this L<AnyEvent::Handle> object will operate on.
74		77
75	NOTE: The filehandle will be set to non-blocking (using	78	NOTE: The filehandle will be set to non-blocking mode (using
76	AnyEvent::Util::fh_nonblocking).	79	C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in
		80	that mode.
77		81
78	=item on_eof => $cb->($handle)	82	=item on_eof => $cb->($handle)
79		83
80	Set the callback to be called when an end-of-file condition is detcted,	84	Set the callback to be called when an end-of-file condition is detected,
81	i.e. in the case of a socket, when the other side has closed the	85	i.e. in the case of a socket, when the other side has closed the
82	connection cleanly.	86	connection cleanly.
83		87
		88	For sockets, this just means that the other side has stopped sending data,
		89	you can still try to write data, and, in fact, one can return from the eof
		90	callback and continue writing data, as only the read part has been shut
		91	down.
		92
84	While not mandatory, it is highly recommended to set an eof callback,	93	While not mandatory, it is I<highly> recommended to set an eof callback,
85	otherwise you might end up with a closed socket while you are still	94	otherwise you might end up with a closed socket while you are still
86	waiting for data.	95	waiting for data.
		96
		97	If an EOF condition has been detected but no C<on_eof> callback has been
		98	set, then a fatal error will be raised with C<$!> set to <0>.
87		99
88	=item on_error => $cb->($handle, $fatal)	100	=item on_error => $cb->($handle, $fatal)
89		101
90	This is the error callback, which is called when, well, some error	102	This is the error callback, which is called when, well, some error
91	occured, such as not being able to resolve the hostname, failure to	103	occured, such as not being able to resolve the hostname, failure to
92	connect or a read error.	104	connect or a read error.
93		105
94	Some errors are fatal (which is indicated by C<$fatal> being true). On	106	Some errors are fatal (which is indicated by C<$fatal> being true). On
95	fatal errors the handle object will be shut down and will not be	107	fatal errors the handle object will be shut down and will not be usable
		108	(but you are free to look at the current C< ->rbuf >). Examples of fatal
		109	errors are an EOF condition with active (but unsatisifable) read watchers
		110	(C<EPIPE>) or I/O errors.
		111
96	usable. Non-fatal errors can be retried by simply returning, but it is	112	Non-fatal errors can be retried by simply returning, but it is recommended
97	recommended to simply ignore this parameter and instead abondon the handle	113	to simply ignore this parameter and instead abondon the handle object
98	object when this callback is invoked.	114	when this callback is invoked. Examples of non-fatal errors are timeouts
		115	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
99		116
100	On callback entrance, the value of C<$!> contains the operating system	117	On callback entrance, the value of C<$!> contains the operating system
101	error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>).	118	error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>).
102		119
103	While not mandatory, it is I<highly> recommended to set this callback, as	120	While not mandatory, it is I<highly> recommended to set this callback, as
…		…
105	C<croak>.	122	C<croak>.
106		123
107	=item on_read => $cb->($handle)	124	=item on_read => $cb->($handle)
108		125
109	This sets the default read callback, which is called when data arrives	126	This sets the default read callback, which is called when data arrives
110	and no read request is in the queue.	127	and no read request is in the queue (unlike read queue callbacks, this
		128	callback will only be called when at least one octet of data is in the
		129	read buffer).
111		130
112	To access (and remove data from) the read buffer, use the C<< ->rbuf >>	131	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
113	method or access the C<$handle->{rbuf}> member directly.	132	method or access the C<$handle->{rbuf}> member directly.
114		133
115	When an EOF condition is detected then AnyEvent::Handle will first try to	134	When an EOF condition is detected then AnyEvent::Handle will first try to
…		…
121		140
122	This sets the callback that is called when the write buffer becomes empty	141	This sets the callback that is called when the write buffer becomes empty
123	(or when the callback is set and the buffer is empty already).	142	(or when the callback is set and the buffer is empty already).
124		143
125	To append to the write buffer, use the C<< ->push_write >> method.	144	To append to the write buffer, use the C<< ->push_write >> method.
		145
		146	This callback is useful when you don't want to put all of your write data
		147	into the queue at once, for example, when you want to write the contents
		148	of some file to the socket you might not want to read the whole file into
		149	memory and push it into the queue, but instead only read more data from
		150	the file when the write queue becomes empty.
126		151
127	=item timeout => $fractional_seconds	152	=item timeout => $fractional_seconds
128		153
129	If non-zero, then this enables an "inactivity" timeout: whenever this many	154	If non-zero, then this enables an "inactivity" timeout: whenever this many
130	seconds pass without a successful read or write on the underlying file	155	seconds pass without a successful read or write on the underlying file
…		…
154	be configured to accept only so-and-so much data that it cannot act on	179	be configured to accept only so-and-so much data that it cannot act on
155	(for example, when expecting a line, an attacker could send an unlimited	180	(for example, when expecting a line, an attacker could send an unlimited
156	amount of data without a callback ever being called as long as the line	181	amount of data without a callback ever being called as long as the line
157	isn't finished).	182	isn't finished).
158		183
		184	=item autocork => <boolean>
		185
		186	When disabled (the default), then C<push_write> will try to immediately
		187	write the data to the handle if possible. This avoids having to register
		188	a write watcher and wait for the next event loop iteration, but can be
		189	inefficient if you write multiple small chunks (this disadvantage is
		190	usually avoided by your kernel's nagle algorithm, see C<low_delay>).
		191
		192	When enabled, then writes will always be queued till the next event loop
		193	iteration. This is efficient when you do many small writes per iteration,
		194	but less efficient when you do a single write only.
		195
		196	=item no_delay => <boolean>
		197
		198	When doing small writes on sockets, your operating system kernel might
		199	wait a bit for more data before actually sending it out. This is called
		200	the Nagle algorithm, and usually it is beneficial.
		201
		202	In some situations you want as low a delay as possible, which cna be
		203	accomplishd by setting this option to true.
		204
		205	The default is your opertaing system's default behaviour, this option
		206	explicitly enables or disables it, if possible.
		207
159	=item read_size => <bytes>	208	=item read_size => <bytes>
160		209
161	The default read block size (the amount of bytes this module will try to read	210	The default read block size (the amount of bytes this module will try to read
162	during each (loop iteration). Default: C<8192>.	211	during each (loop iteration). Default: C<8192>.
163		212
…		…
165		214
166	Sets the amount of bytes (default: C<0>) that make up an "empty" write	215	Sets the amount of bytes (default: C<0>) that make up an "empty" write
167	buffer: If the write reaches this size or gets even samller it is	216	buffer: If the write reaches this size or gets even samller it is
168	considered empty.	217	considered empty.
169		218
		219	=item linger => <seconds>
		220
		221	If non-zero (default: C<3600>), then the destructor of the
		222	AnyEvent::Handle object will check wether there is still outstanding write
		223	data and will install a watcher that will write out this data. No errors
		224	will be reported (this mostly matches how the operating system treats
		225	outstanding data at socket close time).
		226
		227	This will not work for partial TLS data that could not yet been
		228	encoded. This data will be lost.
		229
170	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object	230	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
171		231
172	When this parameter is given, it enables TLS (SSL) mode, that means it	232	When this parameter is given, it enables TLS (SSL) mode, that means
173	will start making tls handshake and will transparently encrypt/decrypt	233	AnyEvent will start a TLS handshake and will transparently encrypt/decrypt
174	data.	234	data.
175		235
176	TLS mode requires Net::SSLeay to be installed (it will be loaded	236	TLS mode requires Net::SSLeay to be installed (it will be loaded
177	automatically when you try to create a TLS handle).	237	automatically when you try to create a TLS handle).
178		238
179	For the TLS server side, use C<accept>, and for the TLS client side of a	239	Unlike TCP, TLS has a server and client side: for the TLS server side, use
180	connection, use C<connect> mode.	240	C<accept>, and for the TLS client side of a connection, use C<connect>
		241	mode.
181		242
182	You can also provide your own TLS connection object, but you have	243	You can also provide your own TLS connection object, but you have
183	to make sure that you call either C<Net::SSLeay::set_connect_state>	244	to make sure that you call either C<Net::SSLeay::set_connect_state>
184	or C<Net::SSLeay::set_accept_state> on it before you pass it to	245	or C<Net::SSLeay::set_accept_state> on it before you pass it to
185	AnyEvent::Handle.	246	AnyEvent::Handle.
186		247
187	See the C<starttls> method if you need to start TLs negotiation later.	248	See the C<starttls> method for when need to start TLS negotiation later.
188		249
189	=item tls_ctx => $ssl_ctx	250	=item tls_ctx => $ssl_ctx
190		251
191	Use the given Net::SSLeay::CTX object to create the new TLS connection	252	Use the given Net::SSLeay::CTX object to create the new TLS connection
192	(unless a connection object was specified directly). If this parameter is	253	(unless a connection object was specified directly). If this parameter is
…		…
195	=item json => JSON or JSON::XS object	256	=item json => JSON or JSON::XS object
196		257
197	This is the json coder object used by the C<json> read and write types.	258	This is the json coder object used by the C<json> read and write types.
198		259
199	If you don't supply it, then AnyEvent::Handle will create and use a	260	If you don't supply it, then AnyEvent::Handle will create and use a
200	suitable one, which will write and expect UTF-8 encoded JSON texts.	261	suitable one (on demand), which will write and expect UTF-8 encoded JSON
		262	texts.
201		263
202	Note that you are responsible to depend on the JSON module if you want to	264	Note that you are responsible to depend on the JSON module if you want to
203	use this functionality, as AnyEvent does not have a dependency itself.	265	use this functionality, as AnyEvent does not have a dependency itself.
204		266
205	=item filter_r => $cb	267	=item filter_r => $cb
…		…
224	if ($self->{tls}) {	286	if ($self->{tls}) {
225	require Net::SSLeay;	287	require Net::SSLeay;
226	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx});	288	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx});
227	}	289	}
228		290
229	# $self->on_eof (delete $self->{on_eof} ) if $self->{on_eof}; # nop
230	# $self->on_error (delete $self->{on_error}) if $self->{on_error}; # nop
231	# $self->on_read (delete $self->{on_read} ) if $self->{on_read}; # nop
232	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};
233
234	$self->{_activity} = AnyEvent->now;	291	$self->{_activity} = AnyEvent->now;
235	$self->_timeout;	292	$self->_timeout;
236		293
		294	$self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain};
		295	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};
		296
237	$self->start_read;	297	$self->start_read
		298	if $self->{on_read};
238		299
239	$self	300	$self
240	}	301	}
241		302
242	sub _shutdown {	303	sub _shutdown {
…		…
246	delete $self->{_rw};	307	delete $self->{_rw};
247	delete $self->{_ww};	308	delete $self->{_ww};
248	delete $self->{fh};	309	delete $self->{fh};
249		310
250	$self->stoptls;	311	$self->stoptls;
		312
		313	delete $self->{on_read};
		314	delete $self->{_queue};
251	}	315	}
252		316
253	sub _error {	317	sub _error {
254	my ($self, $errno, $fatal) = @_;	318	my ($self, $errno, $fatal) = @_;
255		319
…		…
301		365
302	=cut	366	=cut
303		367
304	sub on_timeout {	368	sub on_timeout {
305	$_[0]{on_timeout} = $_[1];	369	$_[0]{on_timeout} = $_[1];
		370	}
		371
		372	=item $handle->autocork ($boolean)
		373
		374	Enables or disables the current autocork behaviour (see C<autocork>
		375	constructor argument).
		376
		377	=cut
		378
		379	=item $handle->no_delay ($boolean)
		380
		381	Enables or disables the C<no_delay> setting (see constructor argument of
		382	the same name for details).
		383
		384	=cut
		385
		386	sub no_delay {
		387	$_[0]{no_delay} = $_[1];
		388
		389	eval {
		390	local $SIG{__DIE__};
		391	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1];
		392	};
306	}	393	}
307		394
308	#############################################################################	395	#############################################################################
309		396
310	=item $handle->timeout ($seconds)	397	=item $handle->timeout ($seconds)
…		…
339	$self->{on_timeout}($self);	426	$self->{on_timeout}($self);
340	} else {	427	} else {
341	$self->_error (&Errno::ETIMEDOUT);	428	$self->_error (&Errno::ETIMEDOUT);
342	}	429	}
343		430
344	# callbakx could have changed timeout value, optimise	431	# callback could have changed timeout value, optimise
345	return unless $self->{timeout};	432	return unless $self->{timeout};
346		433
347	# calculate new after	434	# calculate new after
348	$after = $self->{timeout};	435	$after = $self->{timeout};
349	}	436	}
350		437
351	Scalar::Util::weaken $self;	438	Scalar::Util::weaken $self;
		439	return unless $self; # ->error could have destroyed $self
352		440
353	$self->{_tw} \|\|= AnyEvent->timer (after => $after, cb => sub {	441	$self->{_tw} \|\|= AnyEvent->timer (after => $after, cb => sub {
354	delete $self->{_tw};	442	delete $self->{_tw};
355	$self->_timeout;	443	$self->_timeout;
356	});	444	});
…		…
424	$self->_error ($!, 1);	512	$self->_error ($!, 1);
425	}	513	}
426	};	514	};
427		515
428	# try to write data immediately	516	# try to write data immediately
429	$cb->();	517	$cb->() unless $self->{autocork};
430		518
431	# if still data left in wbuf, we need to poll	519	# if still data left in wbuf, we need to poll
432	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)	520	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)
433	if length $self->{wbuf};	521	if length $self->{wbuf};
434	};	522	};
…		…
479	my ($self, $string) = @_;	567	my ($self, $string) = @_;
480		568
481	sprintf "%d:%s,", (length $string), $string	569	sprintf "%d:%s,", (length $string), $string
482	};	570	};
483		571
		572	=item packstring => $format, $data
		573
		574	An octet string prefixed with an encoded length. The encoding C<$format>
		575	uses the same format as a Perl C<pack> format, but must specify a single
		576	integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an
		577	optional C<!>, C<< < >> or C<< > >> modifier).
		578
		579	=cut
		580
		581	register_write_type packstring => sub {
		582	my ($self, $format, $string) = @_;
		583
		584	pack "$format/a*", $string
		585	};
		586
484	=item json => $array_or_hashref	587	=item json => $array_or_hashref
485		588
486	Encodes the given hash or array reference into a JSON object. Unless you	589	Encodes the given hash or array reference into a JSON object. Unless you
487	provide your own JSON object, this means it will be encoded to JSON text	590	provide your own JSON object, this means it will be encoded to JSON text
488	in UTF-8.	591	in UTF-8.
…		…
520		623
521	$self->{json} ? $self->{json}->encode ($ref)	624	$self->{json} ? $self->{json}->encode ($ref)
522	: JSON::encode_json ($ref)	625	: JSON::encode_json ($ref)
523	};	626	};
524		627
		628	=item storable => $reference
		629
		630	Freezes the given reference using L<Storable> and writes it to the
		631	handle. Uses the C<nfreeze> format.
		632
		633	=cut
		634
		635	register_write_type storable => sub {
		636	my ($self, $ref) = @_;
		637
		638	require Storable;
		639
		640	pack "w/a*", Storable::nfreeze ($ref)
		641	};
		642
525	=back	643	=back
526		644
527	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	645	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
528		646
529	This function (not method) lets you add your own types to C<push_write>.	647	This function (not method) lets you add your own types to C<push_write>.
…		…
551	ways, the "simple" way, using only C<on_read> and the "complex" way, using	669	ways, the "simple" way, using only C<on_read> and the "complex" way, using
552	a queue.	670	a queue.
553		671
554	In the simple case, you just install an C<on_read> callback and whenever	672	In the simple case, you just install an C<on_read> callback and whenever
555	new data arrives, it will be called. You can then remove some data (if	673	new data arrives, it will be called. You can then remove some data (if
556	enough is there) from the read buffer (C<< $handle->rbuf >>) if you want	674	enough is there) from the read buffer (C<< $handle->rbuf >>). Or you cna
557	or not.	675	leave the data there if you want to accumulate more (e.g. when only a
		676	partial message has been received so far).
558		677
559	In the more complex case, you want to queue multiple callbacks. In this	678	In the more complex case, you want to queue multiple callbacks. In this
560	case, AnyEvent::Handle will call the first queued callback each time new	679	case, AnyEvent::Handle will call the first queued callback each time new
561	data arrives and removes it when it has done its job (see C<push_read>,	680	data arrives (also the first time it is queued) and removes it when it has
562	below).	681	done its job (see C<push_read>, below).
563		682
564	This way you can, for example, push three line-reads, followed by reading	683	This way you can, for example, push three line-reads, followed by reading
565	a chunk of data, and AnyEvent::Handle will execute them in order.	684	a chunk of data, and AnyEvent::Handle will execute them in order.
566		685
567	Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by	686	Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by
…		…
580	# handle xml	699	# handle xml
581	});	700	});
582	});	701	});
583	});	702	});
584		703
585	Example 2: Implement a client for a protocol that replies either with	704	Example 2: Implement a client for a protocol that replies either with "OK"
586	"OK" and another line or "ERROR" for one request, and 64 bytes for the	705	and another line or "ERROR" for the first request that is sent, and 64
587	second request. Due tot he availability of a full queue, we can just	706	bytes for the second request. Due to the availability of a queue, we can
588	pipeline sending both requests and manipulate the queue as necessary in	707	just pipeline sending both requests and manipulate the queue as necessary
589	the callbacks:	708	in the callbacks.
590		709
591	# request one	710	When the first callback is called and sees an "OK" response, it will
		711	C<unshift> another line-read. This line-read will be queued I<before> the
		712	64-byte chunk callback.
		713
		714	# request one, returns either "OK + extra line" or "ERROR"
592	$handle->push_write ("request 1\015\012");	715	$handle->push_write ("request 1\015\012");
593		716
594	# we expect "ERROR" or "OK" as response, so push a line read	717	# we expect "ERROR" or "OK" as response, so push a line read
595	$handle->push_read (line => sub {	718	$handle->push_read (line => sub {
596	# if we got an "OK", we have to _prepend_ another line,	719	# if we got an "OK", we have to _prepend_ another line,
…		…
603	...	726	...
604	});	727	});
605	}	728	}
606	});	729	});
607		730
608	# request two	731	# request two, simply returns 64 octets
609	$handle->push_write ("request 2\015\012");	732	$handle->push_write ("request 2\015\012");
610		733
611	# simply read 64 bytes, always	734	# simply read 64 bytes, always
612	$handle->push_read (chunk => 64, sub {	735	$handle->push_read (chunk => 64, sub {
613	my $response = $_[1];	736	my $response = $_[1];
…		…
619	=cut	742	=cut
620		743
621	sub _drain_rbuf {	744	sub _drain_rbuf {
622	my ($self) = @_;	745	my ($self) = @_;
623		746
		747	local $self->{_in_drain} = 1;
		748
624	if (	749	if (
625	defined $self->{rbuf_max}	750	defined $self->{rbuf_max}
626	&& $self->{rbuf_max} < length $self->{rbuf}	751	&& $self->{rbuf_max} < length $self->{rbuf}
627	) {	752	) {
628	return $self->_error (&Errno::ENOSPC, 1);	753	$self->_error (&Errno::ENOSPC, 1), return;
629	}	754	}
630		755
631	return if $self->{in_drain};	756	while () {
632	local $self->{in_drain} = 1;
633
634	while (my $len = length $self->{rbuf}) {	757	my $len = length $self->{rbuf};
635	no strict 'refs';	758
636	if (my $cb = shift @{ $self->{_queue} }) {	759	if (my $cb = shift @{ $self->{_queue} }) {
637	unless ($cb->($self)) {	760	unless ($cb->($self)) {
638	if ($self->{_eof}) {	761	if ($self->{_eof}) {
639	# no progress can be made (not enough data and no data forthcoming)	762	# no progress can be made (not enough data and no data forthcoming)
640	return $self->_error (&Errno::EPIPE, 1);	763	$self->_error (&Errno::EPIPE, 1), return;
641	}	764	}
642		765
643	unshift @{ $self->{_queue} }, $cb;	766	unshift @{ $self->{_queue} }, $cb;
644	last;	767	last;
645	}	768	}
646	} elsif ($self->{on_read}) {	769	} elsif ($self->{on_read}) {
		770	last unless $len;
		771
647	$self->{on_read}($self);	772	$self->{on_read}($self);
648		773
649	if (	774	if (
650	$len == length $self->{rbuf} # if no data has been consumed	775	$len == length $self->{rbuf} # if no data has been consumed
651	&& !@{ $self->{_queue} } # and the queue is still empty	776	&& !@{ $self->{_queue} } # and the queue is still empty
652	&& $self->{on_read} # but we still have on_read	777	&& $self->{on_read} # but we still have on_read
653	) {	778	) {
654	# no further data will arrive	779	# no further data will arrive
655	# so no progress can be made	780	# so no progress can be made
656	return $self->_error (&Errno::EPIPE, 1)	781	$self->_error (&Errno::EPIPE, 1), return
657	if $self->{_eof};	782	if $self->{_eof};
658		783
659	last; # more data might arrive	784	last; # more data might arrive
660	}	785	}
661	} else {	786	} else {
…		…
663	delete $self->{_rw};	788	delete $self->{_rw};
664	last;	789	last;
665	}	790	}
666	}	791	}
667		792
		793	if ($self->{_eof}) {
		794	if ($self->{on_eof}) {
668	$self->{on_eof}($self)	795	$self->{on_eof}($self)
669	if $self->{_eof} && $self->{on_eof};	796	} else {
		797	$self->_error (0, 1);
		798	}
		799	}
670		800
671	# may need to restart read watcher	801	# may need to restart read watcher
672	unless ($self->{_rw}) {	802	unless ($self->{_rw}) {
673	$self->start_read	803	$self->start_read
674	if $self->{on_read} \|\| @{ $self->{_queue} };	804	if $self->{on_read} \|\| @{ $self->{_queue} };
…		…
685		815
686	sub on_read {	816	sub on_read {
687	my ($self, $cb) = @_;	817	my ($self, $cb) = @_;
688		818
689	$self->{on_read} = $cb;	819	$self->{on_read} = $cb;
		820	$self->_drain_rbuf if $cb && !$self->{_in_drain};
690	}	821	}
691		822
692	=item $handle->rbuf	823	=item $handle->rbuf
693		824
694	Returns the read buffer (as a modifiable lvalue).	825	Returns the read buffer (as a modifiable lvalue).
…		…
743	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	874	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
744	->($self, $cb, @_);	875	->($self, $cb, @_);
745	}	876	}
746		877
747	push @{ $self->{_queue} }, $cb;	878	push @{ $self->{_queue} }, $cb;
748	$self->_drain_rbuf;	879	$self->_drain_rbuf unless $self->{_in_drain};
749	}	880	}
750		881
751	sub unshift_read {	882	sub unshift_read {
752	my $self = shift;	883	my $self = shift;
753	my $cb = pop;	884	my $cb = pop;
…		…
759	->($self, $cb, @_);	890	->($self, $cb, @_);
760	}	891	}
761		892
762		893
763	unshift @{ $self->{_queue} }, $cb;	894	unshift @{ $self->{_queue} }, $cb;
764	$self->_drain_rbuf;	895	$self->_drain_rbuf unless $self->{_in_drain};
765	}	896	}
766		897
767	=item $handle->push_read (type => @args, $cb)	898	=item $handle->push_read (type => @args, $cb)
768		899
769	=item $handle->unshift_read (type => @args, $cb)	900	=item $handle->unshift_read (type => @args, $cb)
…		…
799	$cb->($_[0], substr $_[0]{rbuf}, 0, $len, "");	930	$cb->($_[0], substr $_[0]{rbuf}, 0, $len, "");
800	1	931	1
801	}	932	}
802	};	933	};
803		934
804	# compatibility with older API
805	sub push_read_chunk {
806	$_[0]->push_read (chunk => $_[1], $_[2]);
807	}
808
809	sub unshift_read_chunk {
810	$_[0]->unshift_read (chunk => $_[1], $_[2]);
811	}
812
813	=item line => [$eol, ]$cb->($handle, $line, $eol)	935	=item line => [$eol, ]$cb->($handle, $line, $eol)
814		936
815	The callback will be called only once a full line (including the end of	937	The callback will be called only once a full line (including the end of
816	line marker, C<$eol>) has been read. This line (excluding the end of line	938	line marker, C<$eol>) has been read. This line (excluding the end of line
817	marker) will be passed to the callback as second argument (C<$line>), and	939	marker) will be passed to the callback as second argument (C<$line>), and
…		…
832	=cut	954	=cut
833		955
834	register_read_type line => sub {	956	register_read_type line => sub {
835	my ($self, $cb, $eol) = @_;	957	my ($self, $cb, $eol) = @_;
836		958
837	$eol = qr\|(\015?\012)\| if @_ < 3;	959	if (@_ < 3) {
838	$eol = quotemeta $eol unless ref $eol;	960	# this is more than twice as fast as the generic code below
839	$eol = qr\|^(.*?)($eol)\|s;
840
841	sub {	961	sub {
842	$_[0]{rbuf} =~ s/$eol// or return;	962	$_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return;
843		963
844	$cb->($_[0], $1, $2);	964	$cb->($_[0], $1, $2);
845	1
846	}
847	};
848
849	# compatibility with older API
850	sub push_read_line {
851	my $self = shift;
852	$self->push_read (line => @_);
853	}
854
855	sub unshift_read_line {
856	my $self = shift;
857	$self->unshift_read (line => @_);
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	}	965	1
876	return;
877	}	966	}
		967	} else {
		968	$eol = quotemeta $eol unless ref $eol;
		969	$eol = qr\|^(.*?)($eol)\|s;
878		970
879	my $len = $1;	971	sub {
		972	$_[0]{rbuf} =~ s/$eol// or return;
880		973
881	$self->unshift_read (chunk => $len, sub {	974	$cb->($_[0], $1, $2);
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	});	975	1
890	});	976	}
891
892	1
893	}	977	}
894	};	978	};
895		979
896	=item regex => $accept[, $reject[, $skip], $cb->($handle, $data)	980	=item regex => $accept[, $reject[, $skip], $cb->($handle, $data)
897		981
…		…
961		1045
962	()	1046	()
963	}	1047	}
964	};	1048	};
965		1049
		1050	=item netstring => $cb->($handle, $string)
		1051
		1052	A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement).
		1053
		1054	Throws an error with C<$!> set to EBADMSG on format violations.
		1055
		1056	=cut
		1057
		1058	register_read_type netstring => sub {
		1059	my ($self, $cb) = @_;
		1060
		1061	sub {
		1062	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {
		1063	if ($_[0]{rbuf} =~ /[^0-9]/) {
		1064	$self->_error (&Errno::EBADMSG);
		1065	}
		1066	return;
		1067	}
		1068
		1069	my $len = $1;
		1070
		1071	$self->unshift_read (chunk => $len, sub {
		1072	my $string = $_[1];
		1073	$_[0]->unshift_read (chunk => 1, sub {
		1074	if ($_[1] eq ",") {
		1075	$cb->($_[0], $string);
		1076	} else {
		1077	$self->_error (&Errno::EBADMSG);
		1078	}
		1079	});
		1080	});
		1081
		1082	1
		1083	}
		1084	};
		1085
		1086	=item packstring => $format, $cb->($handle, $string)
		1087
		1088	An octet string prefixed with an encoded length. The encoding C<$format>
		1089	uses the same format as a Perl C<pack> format, but must specify a single
		1090	integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an
		1091	optional C<!>, C<< < >> or C<< > >> modifier).
		1092
		1093	DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>.
		1094
		1095	Example: read a block of data prefixed by its length in BER-encoded
		1096	format (very efficient).
		1097
		1098	$handle->push_read (packstring => "w", sub {
		1099	my ($handle, $data) = @_;
		1100	});
		1101
		1102	=cut
		1103
		1104	register_read_type packstring => sub {
		1105	my ($self, $cb, $format) = @_;
		1106
		1107	sub {
		1108	# when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method
		1109	defined (my $len = eval { unpack $format, $_[0]{rbuf} })
		1110	or return;
		1111
		1112	$format = length pack $format, $len;
		1113
		1114	# bypass unshift if we already have the remaining chunk
		1115	if ($format + $len <= length $_[0]{rbuf}) {
		1116	my $data = substr $_[0]{rbuf}, $format, $len;
		1117	substr $_[0]{rbuf}, 0, $format + $len, "";
		1118	$cb->($_[0], $data);
		1119	} else {
		1120	# remove prefix
		1121	substr $_[0]{rbuf}, 0, $format, "";
		1122
		1123	# read remaining chunk
		1124	$_[0]->unshift_read (chunk => $len, $cb);
		1125	}
		1126
		1127	1
		1128	}
		1129	};
		1130
966	=item json => $cb->($handle, $hash_or_arrayref)	1131	=item json => $cb->($handle, $hash_or_arrayref)
967		1132
968	Reads a JSON object or array, decodes it and passes it to the callback.	1133	Reads a JSON object or array, decodes it and passes it to the callback.
969		1134
970	If a C<json> object was passed to the constructor, then that will be used	1135	If a C<json> object was passed to the constructor, then that will be used
…		…
980	the C<json> write type description, above, for an actual example.	1145	the C<json> write type description, above, for an actual example.
981		1146
982	=cut	1147	=cut
983		1148
984	register_read_type json => sub {	1149	register_read_type json => sub {
985	my ($self, $cb, $accept, $reject, $skip) = @_;	1150	my ($self, $cb) = @_;
986		1151
987	require JSON;	1152	require JSON;
988		1153
989	my $data;	1154	my $data;
990	my $rbuf = \$self->{rbuf};	1155	my $rbuf = \$self->{rbuf};
…		…
1005	()	1170	()
1006	}	1171	}
1007	}	1172	}
1008	};	1173	};
1009		1174
		1175	=item storable => $cb->($handle, $ref)
		1176
		1177	Deserialises a L<Storable> frozen representation as written by the
		1178	C<storable> write type (BER-encoded length prefix followed by nfreeze'd
		1179	data).
		1180
		1181	Raises C<EBADMSG> error if the data could not be decoded.
		1182
		1183	=cut
		1184
		1185	register_read_type storable => sub {
		1186	my ($self, $cb) = @_;
		1187
		1188	require Storable;
		1189
		1190	sub {
		1191	# when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method
		1192	defined (my $len = eval { unpack "w", $_[0]{rbuf} })
		1193	or return;
		1194
		1195	my $format = length pack "w", $len;
		1196
		1197	# bypass unshift if we already have the remaining chunk
		1198	if ($format + $len <= length $_[0]{rbuf}) {
		1199	my $data = substr $_[0]{rbuf}, $format, $len;
		1200	substr $_[0]{rbuf}, 0, $format + $len, "";
		1201	$cb->($_[0], Storable::thaw ($data));
		1202	} else {
		1203	# remove prefix
		1204	substr $_[0]{rbuf}, 0, $format, "";
		1205
		1206	# read remaining chunk
		1207	$_[0]->unshift_read (chunk => $len, sub {
		1208	if (my $ref = eval { Storable::thaw ($_[1]) }) {
		1209	$cb->($_[0], $ref);
		1210	} else {
		1211	$self->_error (&Errno::EBADMSG);
		1212	}
		1213	});
		1214	}
		1215
		1216	1
		1217	}
		1218	};
		1219
1010	=back	1220	=back
1011		1221
1012	=item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args)	1222	=item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args)
1013		1223
1014	This function (not method) lets you add your own types to C<push_read>.	1224	This function (not method) lets you add your own types to C<push_read>.
…		…
1032	=item $handle->stop_read	1242	=item $handle->stop_read
1033		1243
1034	=item $handle->start_read	1244	=item $handle->start_read
1035		1245
1036	In rare cases you actually do not want to read anything from the	1246	In rare cases you actually do not want to read anything from the
1037	socket. In this case you can call C<stop_read>. Neither C<on_read> no	1247	socket. In this case you can call C<stop_read>. Neither C<on_read> nor
1038	any queued callbacks will be executed then. To start reading again, call	1248	any queued callbacks will be executed then. To start reading again, call
1039	C<start_read>.	1249	C<start_read>.
		1250
		1251	Note that AnyEvent::Handle will automatically C<start_read> for you when
		1252	you change the C<on_read> callback or push/unshift a read callback, and it
		1253	will automatically C<stop_read> for you when neither C<on_read> is set nor
		1254	there are any read requests in the queue.
1040		1255
1041	=cut	1256	=cut
1042		1257
1043	sub stop_read {	1258	sub stop_read {
1044	my ($self) = @_;	1259	my ($self) = @_;
…		…
1059	if ($len > 0) {	1274	if ($len > 0) {
1060	$self->{_activity} = AnyEvent->now;	1275	$self->{_activity} = AnyEvent->now;
1061		1276
1062	$self->{filter_r}	1277	$self->{filter_r}
1063	? $self->{filter_r}($self, $rbuf)	1278	? $self->{filter_r}($self, $rbuf)
1064	: $self->_drain_rbuf;	1279	: $self->{_in_drain} \|\| $self->_drain_rbuf;
1065		1280
1066	} elsif (defined $len) {	1281	} elsif (defined $len) {
1067	delete $self->{_rw};	1282	delete $self->{_rw};
1068	$self->{_eof} = 1;	1283	$self->{_eof} = 1;
1069	$self->_drain_rbuf;	1284	$self->_drain_rbuf unless $self->{_in_drain};
1070		1285
1071	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	1286	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
1072	return $self->_error ($!, 1);	1287	return $self->_error ($!, 1);
1073	}	1288	}
1074	});	1289	});
…		…
1076	}	1291	}
1077		1292
1078	sub _dotls {	1293	sub _dotls {
1079	my ($self) = @_;	1294	my ($self) = @_;
1080		1295
		1296	my $buf;
		1297
1081	if (length $self->{_tls_wbuf}) {	1298	if (length $self->{_tls_wbuf}) {
1082	while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {	1299	while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
1083	substr $self->{_tls_wbuf}, 0, $len, "";	1300	substr $self->{_tls_wbuf}, 0, $len, "";
1084	}	1301	}
1085	}	1302	}
1086		1303
1087	if (defined (my $buf = Net::SSLeay::BIO_read ($self->{_wbio}))) {	1304	if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) {
1088	$self->{wbuf} .= $buf;	1305	$self->{wbuf} .= $buf;
1089	$self->_drain_wbuf;	1306	$self->_drain_wbuf;
1090	}	1307	}
1091		1308
1092	while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) {	1309	while (defined ($buf = Net::SSLeay::read ($self->{tls}))) {
		1310	if (length $buf) {
1093	$self->{rbuf} .= $buf;	1311	$self->{rbuf} .= $buf;
1094	$self->_drain_rbuf;	1312	$self->_drain_rbuf unless $self->{_in_drain};
		1313	} else {
		1314	# let's treat SSL-eof as we treat normal EOF
		1315	$self->{_eof} = 1;
		1316	$self->_shutdown;
		1317	return;
		1318	}
1095	}	1319	}
1096		1320
1097	my $err = Net::SSLeay::get_error ($self->{tls}, -1);	1321	my $err = Net::SSLeay::get_error ($self->{tls}, -1);
1098		1322
1099	if ($err!= Net::SSLeay::ERROR_WANT_READ ()) {	1323	if ($err!= Net::SSLeay::ERROR_WANT_READ ()) {
…		…
1185		1409
1186	sub DESTROY {	1410	sub DESTROY {
1187	my $self = shift;	1411	my $self = shift;
1188		1412
1189	$self->stoptls;	1413	$self->stoptls;
		1414
		1415	my $linger = exists $self->{linger} ? $self->{linger} : 3600;
		1416
		1417	if ($linger && length $self->{wbuf}) {
		1418	my $fh = delete $self->{fh};
		1419	my $wbuf = delete $self->{wbuf};
		1420
		1421	my @linger;
		1422
		1423	push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub {
		1424	my $len = syswrite $fh, $wbuf, length $wbuf;
		1425
		1426	if ($len > 0) {
		1427	substr $wbuf, 0, $len, "";
		1428	} else {
		1429	@linger = (); # end
		1430	}
		1431	});
		1432	push @linger, AnyEvent->timer (after => $linger, cb => sub {
		1433	@linger = ();
		1434	});
		1435	}
1190	}	1436	}
1191		1437
1192	=item AnyEvent::Handle::TLS_CTX	1438	=item AnyEvent::Handle::TLS_CTX
1193		1439
1194	This function creates and returns the Net::SSLeay::CTX object used by	1440	This function creates and returns the Net::SSLeay::CTX object used by
…		…
1236	=over 4	1482	=over 4
1237		1483
1238	=item * all constructor arguments become object members.	1484	=item * all constructor arguments become object members.
1239		1485
1240	At least initially, when you pass a C<tls>-argument to the constructor it	1486	At least initially, when you pass a C<tls>-argument to the constructor it
1241	will end up in C<< $handle->{tls} >>. Those members might be changes or	1487	will end up in C<< $handle->{tls} >>. Those members might be changed or
1242	mutated later on (for example C<tls> will hold the TLS connection object).	1488	mutated later on (for example C<tls> will hold the TLS connection object).
1243		1489
1244	=item * other object member names are prefixed with an C<_>.	1490	=item * other object member names are prefixed with an C<_>.
1245		1491
1246	All object members not explicitly documented (internal use) are prefixed	1492	All object members not explicitly documented (internal use) are prefixed

Diff Legend

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+Removed lines
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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.55 by root, Tue Jun 3 16:15:30 2008 UTC vs. Revision 1.86 by root, Thu Aug 21 20:41:16 2008 UTC

Diff Legend

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.55 by root, Tue Jun 3 16:15:30 2008 UTC vs.
Revision 1.86 by root, Thu Aug 21 20:41:16 2008 UTC