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

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.58 by root, Wed Jun 4 22:51:15 2008 UTC vs.
Revision 1.80 by root, Sun Jul 27 08:43:32 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 = 4.13;	19	our $VERSION = 4.22;
20		20
21	=head1 SYNOPSIS	21	=head1 SYNOPSIS
22		22
23	use AnyEvent;	23	use AnyEvent;
24	use AnyEvent::Handle;	24	use AnyEvent::Handle;
…		…
75	NOTE: The filehandle will be set to non-blocking (using	75	NOTE: The filehandle will be set to non-blocking (using
76	AnyEvent::Util::fh_nonblocking).	76	AnyEvent::Util::fh_nonblocking).
77		77
78	=item on_eof => $cb->($handle)	78	=item on_eof => $cb->($handle)
79		79
80	Set the callback to be called when an end-of-file condition is detcted,	80	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	81	i.e. in the case of a socket, when the other side has closed the
82	connection cleanly.	82	connection cleanly.
83		83
84	While not mandatory, it is highly recommended to set an eof callback,	84	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	85	otherwise you might end up with a closed socket while you are still
86	waiting for data.	86	waiting for data.
		87
		88	If an EOF condition has been detected but no C<on_eof> callback has been
		89	set, then a fatal error will be raised with C<$!> set to <0>.
87		90
88	=item on_error => $cb->($handle, $fatal)	91	=item on_error => $cb->($handle, $fatal)
89		92
90	This is the error callback, which is called when, well, some error	93	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	94	occured, such as not being able to resolve the hostname, failure to
…		…
105	C<croak>.	108	C<croak>.
106		109
107	=item on_read => $cb->($handle)	110	=item on_read => $cb->($handle)
108		111
109	This sets the default read callback, which is called when data arrives	112	This sets the default read callback, which is called when data arrives
110	and no read request is in the queue.	113	and no read request is in the queue (unlike read queue callbacks, this
		114	callback will only be called when at least one octet of data is in the
		115	read buffer).
111		116
112	To access (and remove data from) the read buffer, use the C<< ->rbuf >>	117	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
113	method or access the C<$handle->{rbuf}> member directly.	118	method or access the C<$handle->{rbuf}> member directly.
114		119
115	When an EOF condition is detected then AnyEvent::Handle will first try to	120	When an EOF condition is detected then AnyEvent::Handle will first try to
…		…
121		126
122	This sets the callback that is called when the write buffer becomes empty	127	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).	128	(or when the callback is set and the buffer is empty already).
124		129
125	To append to the write buffer, use the C<< ->push_write >> method.	130	To append to the write buffer, use the C<< ->push_write >> method.
		131
		132	This callback is useful when you don't want to put all of your write data
		133	into the queue at once, for example, when you want to write the contents
		134	of some file to the socket you might not want to read the whole file into
		135	memory and push it into the queue, but instead only read more data from
		136	the file when the write queue becomes empty.
126		137
127	=item timeout => $fractional_seconds	138	=item timeout => $fractional_seconds
128		139
129	If non-zero, then this enables an "inactivity" timeout: whenever this many	140	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	141	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	165	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	166	(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	167	amount of data without a callback ever being called as long as the line
157	isn't finished).	168	isn't finished).
158		169
		170	=item autocork => <boolean>
		171
		172	When disabled (the default), then C<push_write> will try to immediately
		173	write the data to the handle if possible. This avoids having to register
		174	a write watcher and wait for the next event loop iteration, but can be
		175	inefficient if you write multiple small chunks (this disadvantage is
		176	usually avoided by your kernel's nagle algorithm, see C<low_delay>).
		177
		178	When enabled, then writes will always be queued till the next event loop
		179	iteration. This is efficient when you do many small writes per iteration,
		180	but less efficient when you do a single write only.
		181
		182	=item no_delay => <boolean>
		183
		184	When doing small writes on sockets, your operating system kernel might
		185	wait a bit for more data before actually sending it out. This is called
		186	the Nagle algorithm, and usually it is beneficial.
		187
		188	In some situations you want as low a delay as possible, which cna be
		189	accomplishd by setting this option to true.
		190
		191	The default is your opertaing system's default behaviour, this option
		192	explicitly enables or disables it, if possible.
		193
159	=item read_size => <bytes>	194	=item read_size => <bytes>
160		195
161	The default read block size (the amount of bytes this module will try to read	196	The default read block size (the amount of bytes this module will try to read
162	during each (loop iteration). Default: C<8192>.	197	during each (loop iteration). Default: C<8192>.
163		198
164	=item low_water_mark => <bytes>	199	=item low_water_mark => <bytes>
165		200
166	Sets the amount of bytes (default: C<0>) that make up an "empty" write	201	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	202	buffer: If the write reaches this size or gets even samller it is
168	considered empty.	203	considered empty.
		204
		205	=item linger => <seconds>
		206
		207	If non-zero (default: C<3600>), then the destructor of the
		208	AnyEvent::Handle object will check wether there is still outstanding write
		209	data and will install a watcher that will write out this data. No errors
		210	will be reported (this mostly matches how the operating system treats
		211	outstanding data at socket close time).
		212
		213	This will not work for partial TLS data that could not yet been
		214	encoded. This data will be lost.
169		215
170	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object	216	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
171		217
172	When this parameter is given, it enables TLS (SSL) mode, that means it	218	When this parameter is given, it enables TLS (SSL) mode, that means it
173	will start making tls handshake and will transparently encrypt/decrypt	219	will start making tls handshake and will transparently encrypt/decrypt
…		…
182	You can also provide your own TLS connection object, but you have	228	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>	229	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	230	or C<Net::SSLeay::set_accept_state> on it before you pass it to
185	AnyEvent::Handle.	231	AnyEvent::Handle.
186		232
187	See the C<starttls> method if you need to start TLs negotiation later.	233	See the C<starttls> method if you need to start TLS negotiation later.
188		234
189	=item tls_ctx => $ssl_ctx	235	=item tls_ctx => $ssl_ctx
190		236
191	Use the given Net::SSLeay::CTX object to create the new TLS connection	237	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	238	(unless a connection object was specified directly). If this parameter is
…		…
227	}	273	}
228		274
229	$self->{_activity} = AnyEvent->now;	275	$self->{_activity} = AnyEvent->now;
230	$self->_timeout;	276	$self->_timeout;
231		277
232	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};	278	$self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain};
233	$self->on_read (delete $self->{on_read} ) if $self->{on_read};	279	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};
		280
		281	$self->start_read
		282	if $self->{on_read};
234		283
235	$self	284	$self
236	}	285	}
237		286
238	sub _shutdown {	287	sub _shutdown {
…		…
297		346
298	=cut	347	=cut
299		348
300	sub on_timeout {	349	sub on_timeout {
301	$_[0]{on_timeout} = $_[1];	350	$_[0]{on_timeout} = $_[1];
		351	}
		352
		353	=item $handle->autocork ($boolean)
		354
		355	Enables or disables the current autocork behaviour (see C<autocork>
		356	constructor argument).
		357
		358	=cut
		359
		360	=item $handle->no_delay ($boolean)
		361
		362	Enables or disables the C<no_delay> setting (see constructor argument of
		363	the same name for details).
		364
		365	=cut
		366
		367	sub no_delay {
		368	$_[0]{no_delay} = $_[1];
		369
		370	eval {
		371	local $SIG{__DIE__};
		372	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1];
		373	};
302	}	374	}
303		375
304	#############################################################################	376	#############################################################################
305		377
306	=item $handle->timeout ($seconds)	378	=item $handle->timeout ($seconds)
…		…
421	$self->_error ($!, 1);	493	$self->_error ($!, 1);
422	}	494	}
423	};	495	};
424		496
425	# try to write data immediately	497	# try to write data immediately
426	$cb->();	498	$cb->() unless $self->{autocork};
427		499
428	# if still data left in wbuf, we need to poll	500	# if still data left in wbuf, we need to poll
429	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)	501	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)
430	if length $self->{wbuf};	502	if length $self->{wbuf};
431	};	503	};
…		…
476	my ($self, $string) = @_;	548	my ($self, $string) = @_;
477		549
478	sprintf "%d:%s,", (length $string), $string	550	sprintf "%d:%s,", (length $string), $string
479	};	551	};
480		552
		553	=item packstring => $format, $data
		554
		555	An octet string prefixed with an encoded length. The encoding C<$format>
		556	uses the same format as a Perl C<pack> format, but must specify a single
		557	integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an
		558	optional C<!>, C<< < >> or C<< > >> modifier).
		559
		560	=cut
		561
		562	register_write_type packstring => sub {
		563	my ($self, $format, $string) = @_;
		564
		565	pack "$format/a*", $string
		566	};
		567
481	=item json => $array_or_hashref	568	=item json => $array_or_hashref
482		569
483	Encodes the given hash or array reference into a JSON object. Unless you	570	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	571	provide your own JSON object, this means it will be encoded to JSON text
485	in UTF-8.	572	in UTF-8.
…		…
517		604
518	$self->{json} ? $self->{json}->encode ($ref)	605	$self->{json} ? $self->{json}->encode ($ref)
519	: JSON::encode_json ($ref)	606	: JSON::encode_json ($ref)
520	};	607	};
521		608
		609	=item storable => $reference
		610
		611	Freezes the given reference using L<Storable> and writes it to the
		612	handle. Uses the C<nfreeze> format.
		613
		614	=cut
		615
		616	register_write_type storable => sub {
		617	my ($self, $ref) = @_;
		618
		619	require Storable;
		620
		621	pack "w/a*", Storable::nfreeze ($ref)
		622	};
		623
522	=back	624	=back
523		625
524	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	626	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
525		627
526	This function (not method) lets you add your own types to C<push_write>.	628	This function (not method) lets you add your own types to C<push_write>.
…		…
548	ways, the "simple" way, using only C<on_read> and the "complex" way, using	650	ways, the "simple" way, using only C<on_read> and the "complex" way, using
549	a queue.	651	a queue.
550		652
551	In the simple case, you just install an C<on_read> callback and whenever	653	In the simple case, you just install an C<on_read> callback and whenever
552	new data arrives, it will be called. You can then remove some data (if	654	new data arrives, it will be called. You can then remove some data (if
553	enough is there) from the read buffer (C<< $handle->rbuf >>) if you want	655	enough is there) from the read buffer (C<< $handle->rbuf >>). Or you cna
554	or not.	656	leave the data there if you want to accumulate more (e.g. when only a
		657	partial message has been received so far).
555		658
556	In the more complex case, you want to queue multiple callbacks. In this	659	In the more complex case, you want to queue multiple callbacks. In this
557	case, AnyEvent::Handle will call the first queued callback each time new	660	case, AnyEvent::Handle will call the first queued callback each time new
558	data arrives and removes it when it has done its job (see C<push_read>,	661	data arrives (also the first time it is queued) and removes it when it has
559	below).	662	done its job (see C<push_read>, below).
560		663
561	This way you can, for example, push three line-reads, followed by reading	664	This way you can, for example, push three line-reads, followed by reading
562	a chunk of data, and AnyEvent::Handle will execute them in order.	665	a chunk of data, and AnyEvent::Handle will execute them in order.
563		666
564	Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by	667	Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by
…		…
577	# handle xml	680	# handle xml
578	});	681	});
579	});	682	});
580	});	683	});
581		684
582	Example 2: Implement a client for a protocol that replies either with	685	Example 2: Implement a client for a protocol that replies either with "OK"
583	"OK" and another line or "ERROR" for one request, and 64 bytes for the	686	and another line or "ERROR" for the first request that is sent, and 64
584	second request. Due tot he availability of a full queue, we can just	687	bytes for the second request. Due to the availability of a queue, we can
585	pipeline sending both requests and manipulate the queue as necessary in	688	just pipeline sending both requests and manipulate the queue as necessary
586	the callbacks:	689	in the callbacks.
587		690
588	# request one	691	When the first callback is called and sees an "OK" response, it will
		692	C<unshift> another line-read. This line-read will be queued I<before> the
		693	64-byte chunk callback.
		694
		695	# request one, returns either "OK + extra line" or "ERROR"
589	$handle->push_write ("request 1\015\012");	696	$handle->push_write ("request 1\015\012");
590		697
591	# we expect "ERROR" or "OK" as response, so push a line read	698	# we expect "ERROR" or "OK" as response, so push a line read
592	$handle->push_read (line => sub {	699	$handle->push_read (line => sub {
593	# if we got an "OK", we have to _prepend_ another line,	700	# if we got an "OK", we have to _prepend_ another line,
…		…
600	...	707	...
601	});	708	});
602	}	709	}
603	});	710	});
604		711
605	# request two	712	# request two, simply returns 64 octets
606	$handle->push_write ("request 2\015\012");	713	$handle->push_write ("request 2\015\012");
607		714
608	# simply read 64 bytes, always	715	# simply read 64 bytes, always
609	$handle->push_read (chunk => 64, sub {	716	$handle->push_read (chunk => 64, sub {
610	my $response = $_[1];	717	my $response = $_[1];
…		…
616	=cut	723	=cut
617		724
618	sub _drain_rbuf {	725	sub _drain_rbuf {
619	my ($self) = @_;	726	my ($self) = @_;
620		727
		728	local $self->{_in_drain} = 1;
		729
621	if (	730	if (
622	defined $self->{rbuf_max}	731	defined $self->{rbuf_max}
623	&& $self->{rbuf_max} < length $self->{rbuf}	732	&& $self->{rbuf_max} < length $self->{rbuf}
624	) {	733	) {
625	return $self->_error (&Errno::ENOSPC, 1);	734	return $self->_error (&Errno::ENOSPC, 1);
626	}	735	}
627		736
628	return if $self->{in_drain};	737	while () {
629	local $self->{in_drain} = 1;
630
631	while (my $len = length $self->{rbuf}) {	738	my $len = length $self->{rbuf};
632	no strict 'refs';	739
633	if (my $cb = shift @{ $self->{_queue} }) {	740	if (my $cb = shift @{ $self->{_queue} }) {
634	unless ($cb->($self)) {	741	unless ($cb->($self)) {
635	if ($self->{_eof}) {	742	if ($self->{_eof}) {
636	# no progress can be made (not enough data and no data forthcoming)	743	# no progress can be made (not enough data and no data forthcoming)
637	return $self->_error (&Errno::EPIPE, 1);	744	$self->_error (&Errno::EPIPE, 1), last;
638	}	745	}
639		746
640	unshift @{ $self->{_queue} }, $cb;	747	unshift @{ $self->{_queue} }, $cb;
641	last;	748	last;
642	}	749	}
643	} elsif ($self->{on_read}) {	750	} elsif ($self->{on_read}) {
		751	last unless $len;
		752
644	$self->{on_read}($self);	753	$self->{on_read}($self);
645		754
646	if (	755	if (
647	$len == length $self->{rbuf} # if no data has been consumed	756	$len == length $self->{rbuf} # if no data has been consumed
648	&& !@{ $self->{_queue} } # and the queue is still empty	757	&& !@{ $self->{_queue} } # and the queue is still empty
649	&& $self->{on_read} # but we still have on_read	758	&& $self->{on_read} # but we still have on_read
650	) {	759	) {
651	# no further data will arrive	760	# no further data will arrive
652	# so no progress can be made	761	# so no progress can be made
653	return $self->_error (&Errno::EPIPE, 1)	762	$self->_error (&Errno::EPIPE, 1), last
654	if $self->{_eof};	763	if $self->{_eof};
655		764
656	last; # more data might arrive	765	last; # more data might arrive
657	}	766	}
658	} else {	767	} else {
…		…
660	delete $self->{_rw};	769	delete $self->{_rw};
661	last;	770	last;
662	}	771	}
663	}	772	}
664		773
		774	if ($self->{_eof}) {
		775	if ($self->{on_eof}) {
665	$self->{on_eof}($self)	776	$self->{on_eof}($self)
666	if $self->{_eof} && $self->{on_eof};	777	} else {
		778	$self->_error (0, 1);
		779	}
		780	}
667		781
668	# may need to restart read watcher	782	# may need to restart read watcher
669	unless ($self->{_rw}) {	783	unless ($self->{_rw}) {
670	$self->start_read	784	$self->start_read
671	if $self->{on_read} \|\| @{ $self->{_queue} };	785	if $self->{on_read} \|\| @{ $self->{_queue} };
…		…
682		796
683	sub on_read {	797	sub on_read {
684	my ($self, $cb) = @_;	798	my ($self, $cb) = @_;
685		799
686	$self->{on_read} = $cb;	800	$self->{on_read} = $cb;
687	$self->_drain_rbuf if $cb;	801	$self->_drain_rbuf if $cb && !$self->{_in_drain};
688	}	802	}
689		803
690	=item $handle->rbuf	804	=item $handle->rbuf
691		805
692	Returns the read buffer (as a modifiable lvalue).	806	Returns the read buffer (as a modifiable lvalue).
…		…
741	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	855	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
742	->($self, $cb, @_);	856	->($self, $cb, @_);
743	}	857	}
744		858
745	push @{ $self->{_queue} }, $cb;	859	push @{ $self->{_queue} }, $cb;
746	$self->_drain_rbuf;	860	$self->_drain_rbuf unless $self->{_in_drain};
747	}	861	}
748		862
749	sub unshift_read {	863	sub unshift_read {
750	my $self = shift;	864	my $self = shift;
751	my $cb = pop;	865	my $cb = pop;
…		…
757	->($self, $cb, @_);	871	->($self, $cb, @_);
758	}	872	}
759		873
760		874
761	unshift @{ $self->{_queue} }, $cb;	875	unshift @{ $self->{_queue} }, $cb;
762	$self->_drain_rbuf;	876	$self->_drain_rbuf unless $self->{_in_drain};
763	}	877	}
764		878
765	=item $handle->push_read (type => @args, $cb)	879	=item $handle->push_read (type => @args, $cb)
766		880
767	=item $handle->unshift_read (type => @args, $cb)	881	=item $handle->unshift_read (type => @args, $cb)
…		…
797	$cb->($_[0], substr $_[0]{rbuf}, 0, $len, "");	911	$cb->($_[0], substr $_[0]{rbuf}, 0, $len, "");
798	1	912	1
799	}	913	}
800	};	914	};
801		915
802	# compatibility with older API
803	sub push_read_chunk {
804	$_[0]->push_read (chunk => $_[1], $_[2]);
805	}
806
807	sub unshift_read_chunk {
808	$_[0]->unshift_read (chunk => $_[1], $_[2]);
809	}
810
811	=item line => [$eol, ]$cb->($handle, $line, $eol)	916	=item line => [$eol, ]$cb->($handle, $line, $eol)
812		917
813	The callback will be called only once a full line (including the end of	918	The callback will be called only once a full line (including the end of
814	line marker, C<$eol>) has been read. This line (excluding the end of line	919	line marker, C<$eol>) has been read. This line (excluding the end of line
815	marker) will be passed to the callback as second argument (C<$line>), and	920	marker) will be passed to the callback as second argument (C<$line>), and
…		…
830	=cut	935	=cut
831		936
832	register_read_type line => sub {	937	register_read_type line => sub {
833	my ($self, $cb, $eol) = @_;	938	my ($self, $cb, $eol) = @_;
834		939
835	$eol = qr\|(\015?\012)\| if @_ < 3;	940	if (@_ < 3) {
		941	# this is more than twice as fast as the generic code below
		942	sub {
		943	$_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return;
		944
		945	$cb->($_[0], $1, $2);
		946	1
		947	}
		948	} else {
836	$eol = quotemeta $eol unless ref $eol;	949	$eol = quotemeta $eol unless ref $eol;
837	$eol = qr\|^(.*?)($eol)\|s;	950	$eol = qr\|^(.*?)($eol)\|s;
		951
		952	sub {
		953	$_[0]{rbuf} =~ s/$eol// or return;
		954
		955	$cb->($_[0], $1, $2);
		956	1
		957	}
		958	}
		959	};
		960
		961	=item regex => $accept[, $reject[, $skip], $cb->($handle, $data)
		962
		963	Makes a regex match against the regex object C<$accept> and returns
		964	everything up to and including the match.
		965
		966	Example: read a single line terminated by '\n'.
		967
		968	$handle->push_read (regex => qr<\n>, sub { ... });
		969
		970	If C<$reject> is given and not undef, then it determines when the data is
		971	to be rejected: it is matched against the data when the C<$accept> regex
		972	does not match and generates an C<EBADMSG> error when it matches. This is
		973	useful to quickly reject wrong data (to avoid waiting for a timeout or a
		974	receive buffer overflow).
		975
		976	Example: expect a single decimal number followed by whitespace, reject
		977	anything else (not the use of an anchor).
		978
		979	$handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... });
		980
		981	If C<$skip> is given and not C<undef>, then it will be matched against
		982	the receive buffer when neither C<$accept> nor C<$reject> match,
		983	and everything preceding and including the match will be accepted
		984	unconditionally. This is useful to skip large amounts of data that you
		985	know cannot be matched, so that the C<$accept> or C<$reject> regex do not
		986	have to start matching from the beginning. This is purely an optimisation
		987	and is usually worth only when you expect more than a few kilobytes.
		988
		989	Example: expect a http header, which ends at C<\015\012\015\012>. Since we
		990	expect the header to be very large (it isn't in practise, but...), we use
		991	a skip regex to skip initial portions. The skip regex is tricky in that
		992	it only accepts something not ending in either \015 or \012, as these are
		993	required for the accept regex.
		994
		995	$handle->push_read (regex =>
		996	qr<\015\012\015\012>,
		997	undef, # no reject
		998	qr<^.*[^\015\012]>,
		999	sub { ... });
		1000
		1001	=cut
		1002
		1003	register_read_type regex => sub {
		1004	my ($self, $cb, $accept, $reject, $skip) = @_;
		1005
		1006	my $data;
		1007	my $rbuf = \$self->{rbuf};
838		1008
839	sub {	1009	sub {
840	$_[0]{rbuf} =~ s/$eol// or return;	1010	# accept
841		1011	if ($$rbuf =~ $accept) {
842	$cb->($_[0], $1, $2);	1012	$data .= substr $$rbuf, 0, $+[0], "";
		1013	$cb->($self, $data);
		1014	return 1;
		1015	}
843	1	1016
		1017	# reject
		1018	if ($reject && $$rbuf =~ $reject) {
		1019	$self->_error (&Errno::EBADMSG);
		1020	}
		1021
		1022	# skip
		1023	if ($skip && $$rbuf =~ $skip) {
		1024	$data .= substr $$rbuf, 0, $+[0], "";
		1025	}
		1026
		1027	()
844	}	1028	}
845	};	1029	};
846
847	# compatibility with older API
848	sub push_read_line {
849	my $self = shift;
850	$self->push_read (line => @_);
851	}
852
853	sub unshift_read_line {
854	my $self = shift;
855	$self->unshift_read (line => @_);
856	}
857		1030
858	=item netstring => $cb->($handle, $string)	1031	=item netstring => $cb->($handle, $string)
859		1032
860	A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement).	1033	A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement).
861		1034
…		…
889		1062
890	1	1063	1
891	}	1064	}
892	};	1065	};
893		1066
894	=item regex => $accept[, $reject[, $skip], $cb->($handle, $data)	1067	=item packstring => $format, $cb->($handle, $string)
895		1068
896	Makes a regex match against the regex object C<$accept> and returns	1069	An octet string prefixed with an encoded length. The encoding C<$format>
897	everything up to and including the match.	1070	uses the same format as a Perl C<pack> format, but must specify a single
		1071	integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an
		1072	optional C<!>, C<< < >> or C<< > >> modifier).
898		1073
899	Example: read a single line terminated by '\n'.	1074	DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>.
900		1075
901	$handle->push_read (regex => qr<\n>, sub { ... });	1076	Example: read a block of data prefixed by its length in BER-encoded
		1077	format (very efficient).
902		1078
903	If C<$reject> is given and not undef, then it determines when the data is	1079	$handle->push_read (packstring => "w", sub {
904	to be rejected: it is matched against the data when the C<$accept> regex	1080	my ($handle, $data) = @_;
905	does not match and generates an C<EBADMSG> error when it matches. This is	1081	});
906	useful to quickly reject wrong data (to avoid waiting for a timeout or a
907	receive buffer overflow).
908		1082
909	Example: expect a single decimal number followed by whitespace, reject
910	anything else (not the use of an anchor).
911
912	$handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... });
913
914	If C<$skip> is given and not C<undef>, then it will be matched against
915	the receive buffer when neither C<$accept> nor C<$reject> match,
916	and everything preceding and including the match will be accepted
917	unconditionally. This is useful to skip large amounts of data that you
918	know cannot be matched, so that the C<$accept> or C<$reject> regex do not
919	have to start matching from the beginning. This is purely an optimisation
920	and is usually worth only when you expect more than a few kilobytes.
921
922	Example: expect a http header, which ends at C<\015\012\015\012>. Since we
923	expect the header to be very large (it isn't in practise, but...), we use
924	a skip regex to skip initial portions. The skip regex is tricky in that
925	it only accepts something not ending in either \015 or \012, as these are
926	required for the accept regex.
927
928	$handle->push_read (regex =>
929	qr<\015\012\015\012>,
930	undef, # no reject
931	qr<^.*[^\015\012]>,
932	sub { ... });
933
934	=cut	1083	=cut
935		1084
936	register_read_type regex => sub {	1085	register_read_type packstring => sub {
937	my ($self, $cb, $accept, $reject, $skip) = @_;	1086	my ($self, $cb, $format) = @_;
938
939	my $data;
940	my $rbuf = \$self->{rbuf};
941		1087
942	sub {	1088	sub {
943	# accept	1089	# when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method
944	if ($$rbuf =~ $accept) {	1090	defined (my $len = eval { unpack $format, $_[0]{rbuf} })
945	$data .= substr $$rbuf, 0, $+[0], "";
946	$cb->($self, $data);
947	return 1;	1091	or return;
948	}	1092
		1093	$format = length pack $format, $len;
		1094
		1095	# bypass unshift if we already have the remaining chunk
		1096	if ($format + $len <= length $_[0]{rbuf}) {
		1097	my $data = substr $_[0]{rbuf}, $format, $len;
		1098	substr $_[0]{rbuf}, 0, $format + $len, "";
		1099	$cb->($_[0], $data);
		1100	} else {
		1101	# remove prefix
		1102	substr $_[0]{rbuf}, 0, $format, "";
		1103
		1104	# read remaining chunk
		1105	$_[0]->unshift_read (chunk => $len, $cb);
949		1106	}
950	# reject	1107
951	if ($reject && $$rbuf =~ $reject) {
952	$self->_error (&Errno::EBADMSG);
953	}	1108	1
954
955	# skip
956	if ($skip && $$rbuf =~ $skip) {
957	$data .= substr $$rbuf, 0, $+[0], "";
958	}
959
960	()
961	}	1109	}
962	};	1110	};
963		1111
964	=item json => $cb->($handle, $hash_or_arrayref)	1112	=item json => $cb->($handle, $hash_or_arrayref)
965		1113
…		…
978	the C<json> write type description, above, for an actual example.	1126	the C<json> write type description, above, for an actual example.
979		1127
980	=cut	1128	=cut
981		1129
982	register_read_type json => sub {	1130	register_read_type json => sub {
983	my ($self, $cb, $accept, $reject, $skip) = @_;	1131	my ($self, $cb) = @_;
984		1132
985	require JSON;	1133	require JSON;
986		1134
987	my $data;	1135	my $data;
988	my $rbuf = \$self->{rbuf};	1136	my $rbuf = \$self->{rbuf};
…		…
1003	()	1151	()
1004	}	1152	}
1005	}	1153	}
1006	};	1154	};
1007		1155
		1156	=item storable => $cb->($handle, $ref)
		1157
		1158	Deserialises a L<Storable> frozen representation as written by the
		1159	C<storable> write type (BER-encoded length prefix followed by nfreeze'd
		1160	data).
		1161
		1162	Raises C<EBADMSG> error if the data could not be decoded.
		1163
		1164	=cut
		1165
		1166	register_read_type storable => sub {
		1167	my ($self, $cb) = @_;
		1168
		1169	require Storable;
		1170
		1171	sub {
		1172	# when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method
		1173	defined (my $len = eval { unpack "w", $_[0]{rbuf} })
		1174	or return;
		1175
		1176	my $format = length pack "w", $len;
		1177
		1178	# bypass unshift if we already have the remaining chunk
		1179	if ($format + $len <= length $_[0]{rbuf}) {
		1180	my $data = substr $_[0]{rbuf}, $format, $len;
		1181	substr $_[0]{rbuf}, 0, $format + $len, "";
		1182	$cb->($_[0], Storable::thaw ($data));
		1183	} else {
		1184	# remove prefix
		1185	substr $_[0]{rbuf}, 0, $format, "";
		1186
		1187	# read remaining chunk
		1188	$_[0]->unshift_read (chunk => $len, sub {
		1189	if (my $ref = eval { Storable::thaw ($_[1]) }) {
		1190	$cb->($_[0], $ref);
		1191	} else {
		1192	$self->_error (&Errno::EBADMSG);
		1193	}
		1194	});
		1195	}
		1196
		1197	1
		1198	}
		1199	};
		1200
1008	=back	1201	=back
1009		1202
1010	=item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args)	1203	=item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args)
1011		1204
1012	This function (not method) lets you add your own types to C<push_read>.	1205	This function (not method) lets you add your own types to C<push_read>.
…		…
1062	if ($len > 0) {	1255	if ($len > 0) {
1063	$self->{_activity} = AnyEvent->now;	1256	$self->{_activity} = AnyEvent->now;
1064		1257
1065	$self->{filter_r}	1258	$self->{filter_r}
1066	? $self->{filter_r}($self, $rbuf)	1259	? $self->{filter_r}($self, $rbuf)
1067	: $self->_drain_rbuf;	1260	: $self->{_in_drain} \|\| $self->_drain_rbuf;
1068		1261
1069	} elsif (defined $len) {	1262	} elsif (defined $len) {
1070	delete $self->{_rw};	1263	delete $self->{_rw};
1071	$self->{_eof} = 1;	1264	$self->{_eof} = 1;
1072	$self->_drain_rbuf;	1265	$self->_drain_rbuf unless $self->{_in_drain};
1073		1266
1074	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	1267	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
1075	return $self->_error ($!, 1);	1268	return $self->_error ($!, 1);
1076	}	1269	}
1077	});	1270	});
…		…
1095	}	1288	}
1096		1289
1097	while (defined ($buf = Net::SSLeay::read ($self->{tls}))) {	1290	while (defined ($buf = Net::SSLeay::read ($self->{tls}))) {
1098	if (length $buf) {	1291	if (length $buf) {
1099	$self->{rbuf} .= $buf;	1292	$self->{rbuf} .= $buf;
1100	$self->_drain_rbuf;	1293	$self->_drain_rbuf unless $self->{_in_drain};
1101	} else {	1294	} else {
1102	# let's treat SSL-eof as we treat normal EOF	1295	# let's treat SSL-eof as we treat normal EOF
1103	$self->{_eof} = 1;	1296	$self->{_eof} = 1;
1104	$self->_shutdown;	1297	$self->_shutdown;
1105	return;	1298	return;
…		…
1197		1390
1198	sub DESTROY {	1391	sub DESTROY {
1199	my $self = shift;	1392	my $self = shift;
1200		1393
1201	$self->stoptls;	1394	$self->stoptls;
		1395
		1396	my $linger = exists $self->{linger} ? $self->{linger} : 3600;
		1397
		1398	if ($linger && length $self->{wbuf}) {
		1399	my $fh = delete $self->{fh};
		1400	my $wbuf = delete $self->{wbuf};
		1401
		1402	my @linger;
		1403
		1404	push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub {
		1405	my $len = syswrite $fh, $wbuf, length $wbuf;
		1406
		1407	if ($len > 0) {
		1408	substr $wbuf, 0, $len, "";
		1409	} else {
		1410	@linger = (); # end
		1411	}
		1412	});
		1413	push @linger, AnyEvent->timer (after => $linger, cb => sub {
		1414	@linger = ();
		1415	});
		1416	}
1202	}	1417	}
1203		1418
1204	=item AnyEvent::Handle::TLS_CTX	1419	=item AnyEvent::Handle::TLS_CTX
1205		1420
1206	This function creates and returns the Net::SSLeay::CTX object used by	1421	This function creates and returns the Net::SSLeay::CTX object used by
…		…
1248	=over 4	1463	=over 4
1249		1464
1250	=item * all constructor arguments become object members.	1465	=item * all constructor arguments become object members.
1251		1466
1252	At least initially, when you pass a C<tls>-argument to the constructor it	1467	At least initially, when you pass a C<tls>-argument to the constructor it
1253	will end up in C<< $handle->{tls} >>. Those members might be changes or	1468	will end up in C<< $handle->{tls} >>. Those members might be changed or
1254	mutated later on (for example C<tls> will hold the TLS connection object).	1469	mutated later on (for example C<tls> will hold the TLS connection object).
1255		1470
1256	=item * other object member names are prefixed with an C<_>.	1471	=item * other object member names are prefixed with an C<_>.
1257		1472
1258	All object members not explicitly documented (internal use) are prefixed	1473	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 1.58 by root, Wed Jun 4 22:51:15 2008 UTC vs. Revision 1.80 by root, Sun Jul 27 08:43:32 2008 UTC

Diff Legend

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.58 by root, Wed Jun 4 22:51:15 2008 UTC vs.
Revision 1.80 by root, Sun Jul 27 08:43:32 2008 UTC