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

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.37 by root, Mon May 26 20:02:22 2008 UTC vs.
Revision 1.51 by root, Sat May 31 13:38:01 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 qw(WSAWOULDBLOCK);	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 file handles via AnyEvent	15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16		16
17	=cut	17	=cut
18		18
19	our $VERSION = '0.04';	19	our $VERSION = 4.1;
20		20
21	=head1 SYNOPSIS	21	=head1 SYNOPSIS
22		22
23	use AnyEvent;	23	use AnyEvent;
24	use AnyEvent::Handle;	24	use AnyEvent::Handle;
…		…
73	The filehandle this L<AnyEvent::Handle> object will operate on.	73	The filehandle this L<AnyEvent::Handle> object will operate on.
74		74
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 => $cb->($self)	78	=item on_eof => $cb->($handle)
79		79
80	Set the callback to be called on EOF.	80	Set the callback to be called on EOF.
81		81
82	While not mandatory, it is highly recommended to set an eof callback,	82	While not mandatory, it is highly recommended to set an eof callback,
83	otherwise you might end up with a closed socket while you are still	83	otherwise you might end up with a closed socket while you are still
84	waiting for data.	84	waiting for data.
85		85
86	=item on_error => $cb->($self)	86	=item on_error => $cb->($handle)
87		87
88	This is the fatal error callback, that is called when, well, a fatal error	88	This is the fatal error callback, that is called when, well, a fatal error
89	occurs, such as not being able to resolve the hostname, failure to connect	89	occurs, such as not being able to resolve the hostname, failure to connect
90	or a read error.	90	or a read error.
91		91
92	The object will not be in a usable state when this callback has been	92	The object will not be in a usable state when this callback has been
93	called.	93	called.
94		94
95	On callback entrance, the value of C<$!> contains the operating system	95	On callback entrance, the value of C<$!> contains the operating system
96	error (or C<ENOSPC>, C<EPIPE> or C<EBADMSG>).	96	error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>).
97		97
98	The callbakc should throw an exception. If it returns, then	98	The callback should throw an exception. If it returns, then
99	AnyEvent::Handle will C<croak> for you.	99	AnyEvent::Handle will C<croak> for you.
100		100
101	While not mandatory, it is I<highly> recommended to set this callback, as	101	While not mandatory, it is I<highly> recommended to set this callback, as
102	you will not be notified of errors otherwise. The default simply calls	102	you will not be notified of errors otherwise. The default simply calls
103	die.	103	die.
104		104
105	=item on_read => $cb->($self)	105	=item on_read => $cb->($handle)
106		106
107	This sets the default read callback, which is called when data arrives	107	This sets the default read callback, which is called when data arrives
108	and no read request is in the queue.	108	and no read request is in the queue.
109		109
110	To access (and remove data from) the read buffer, use the C<< ->rbuf >>	110	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
111	method or access the C<$self->{rbuf}> member directly.	111	method or access the C<$handle->{rbuf}> member directly.
112		112
113	When an EOF condition is detected then AnyEvent::Handle will first try to	113	When an EOF condition is detected then AnyEvent::Handle will first try to
114	feed all the remaining data to the queued callbacks and C<on_read> before	114	feed all the remaining data to the queued callbacks and C<on_read> before
115	calling the C<on_eof> callback. If no progress can be made, then a fatal	115	calling the C<on_eof> callback. If no progress can be made, then a fatal
116	error will be raised (with C<$!> set to C<EPIPE>).	116	error will be raised (with C<$!> set to C<EPIPE>).
117		117
118	=item on_drain => $cb->()	118	=item on_drain => $cb->($handle)
119		119
120	This sets the callback that is called when the write buffer becomes empty	120	This sets the callback that is called when the write buffer becomes empty
121	(or when the callback is set and the buffer is empty already).	121	(or when the callback is set and the buffer is empty already).
122		122
123	To append to the write buffer, use the C<< ->push_write >> method.	123	To append to the write buffer, use the C<< ->push_write >> method.
		124
		125	=item timeout => $fractional_seconds
		126
		127	If non-zero, then this enables an "inactivity" timeout: whenever this many
		128	seconds pass without a successful read or write on the underlying file
		129	handle, the C<on_timeout> callback will be invoked (and if that one is
		130	missing, an C<ETIMEDOUT> error will be raised).
		131
		132	Note that timeout processing is also active when you currently do not have
		133	any outstanding read or write requests: If you plan to keep the connection
		134	idle then you should disable the timout temporarily or ignore the timeout
		135	in the C<on_timeout> callback.
		136
		137	Zero (the default) disables this timeout.
		138
		139	=item on_timeout => $cb->($handle)
		140
		141	Called whenever the inactivity timeout passes. If you return from this
		142	callback, then the timeout will be reset as if some activity had happened,
		143	so this condition is not fatal in any way.
124		144
125	=item rbuf_max => <bytes>	145	=item rbuf_max => <bytes>
126		146
127	If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>)	147	If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>)
128	when the read buffer ever (strictly) exceeds this size. This is useful to	148	when the read buffer ever (strictly) exceeds this size. This is useful to
…		…
135	isn't finished).	155	isn't finished).
136		156
137	=item read_size => <bytes>	157	=item read_size => <bytes>
138		158
139	The default read block size (the amount of bytes this module will try to read	159	The default read block size (the amount of bytes this module will try to read
140	on each [loop iteration). Default: C<4096>.	160	during each (loop iteration). Default: C<8192>.
141		161
142	=item low_water_mark => <bytes>	162	=item low_water_mark => <bytes>
143		163
144	Sets the amount of bytes (default: C<0>) that make up an "empty" write	164	Sets the amount of bytes (default: C<0>) that make up an "empty" write
145	buffer: If the write reaches this size or gets even samller it is	165	buffer: If the write reaches this size or gets even samller it is
…		…
168		188
169	Use the given Net::SSLeay::CTX object to create the new TLS connection	189	Use the given Net::SSLeay::CTX object to create the new TLS connection
170	(unless a connection object was specified directly). If this parameter is	190	(unless a connection object was specified directly). If this parameter is
171	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.	191	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.
172		192
		193	=item json => JSON or JSON::XS object
		194
		195	This is the json coder object used by the C<json> read and write types.
		196
		197	If you don't supply it, then AnyEvent::Handle will create and use a
		198	suitable one, which will write and expect UTF-8 encoded JSON texts.
		199
		200	Note that you are responsible to depend on the JSON module if you want to
		201	use this functionality, as AnyEvent does not have a dependency itself.
		202
		203	=item filter_r => $cb
		204
		205	=item filter_w => $cb
		206
		207	These exist, but are undocumented at this time.
		208
173	=back	209	=back
174		210
175	=cut	211	=cut
176		212
177	sub new {	213	sub new {
…		…
186	if ($self->{tls}) {	222	if ($self->{tls}) {
187	require Net::SSLeay;	223	require Net::SSLeay;
188	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx});	224	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx});
189	}	225	}
190		226
191	$self->on_eof (delete $self->{on_eof} ) if $self->{on_eof};	227	# $self->on_eof (delete $self->{on_eof} ) if $self->{on_eof}; # nop
192	$self->on_error (delete $self->{on_error}) if $self->{on_error};	228	# $self->on_error (delete $self->{on_error}) if $self->{on_error}; # nop
		229	# $self->on_read (delete $self->{on_read} ) if $self->{on_read}; # nop
193	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};	230	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};
194	$self->on_read (delete $self->{on_read} ) if $self->{on_read};	231
		232	$self->{_activity} = AnyEvent->now;
		233	$self->_timeout;
195		234
196	$self->start_read;	235	$self->start_read;
197		236
198	$self	237	$self
199	}	238	}
200		239
201	sub _shutdown {	240	sub _shutdown {
202	my ($self) = @_;	241	my ($self) = @_;
203		242
		243	delete $self->{_tw};
204	delete $self->{rw};	244	delete $self->{_rw};
205	delete $self->{ww};	245	delete $self->{_ww};
206	delete $self->{fh};	246	delete $self->{fh};
207	}	247	}
208		248
209	sub error {	249	sub error {
210	my ($self) = @_;	250	my ($self) = @_;
…		…
224		264
225	This method returns the file handle of the L<AnyEvent::Handle> object.	265	This method returns the file handle of the L<AnyEvent::Handle> object.
226		266
227	=cut	267	=cut
228		268
229	sub fh { $_[0]->{fh} }	269	sub fh { $_[0]{fh} }
230		270
231	=item $handle->on_error ($cb)	271	=item $handle->on_error ($cb)
232		272
233	Replace the current C<on_error> callback (see the C<on_error> constructor argument).	273	Replace the current C<on_error> callback (see the C<on_error> constructor argument).
234		274
…		…
244		284
245	=cut	285	=cut
246		286
247	sub on_eof {	287	sub on_eof {
248	$_[0]{on_eof} = $_[1];	288	$_[0]{on_eof} = $_[1];
		289	}
		290
		291	=item $handle->on_timeout ($cb)
		292
		293	Replace the current C<on_timeout> callback, or disables the callback
		294	(but not the timeout) if C<$cb> = C<undef>. See C<timeout> constructor
		295	argument.
		296
		297	=cut
		298
		299	sub on_timeout {
		300	$_[0]{on_timeout} = $_[1];
		301	}
		302
		303	#############################################################################
		304
		305	=item $handle->timeout ($seconds)
		306
		307	Configures (or disables) the inactivity timeout.
		308
		309	=cut
		310
		311	sub timeout {
		312	my ($self, $timeout) = @_;
		313
		314	$self->{timeout} = $timeout;
		315	$self->_timeout;
		316	}
		317
		318	# reset the timeout watcher, as neccessary
		319	# also check for time-outs
		320	sub _timeout {
		321	my ($self) = @_;
		322
		323	if ($self->{timeout}) {
		324	my $NOW = AnyEvent->now;
		325
		326	# when would the timeout trigger?
		327	my $after = $self->{_activity} + $self->{timeout} - $NOW;
		328
		329	# now or in the past already?
		330	if ($after <= 0) {
		331	$self->{_activity} = $NOW;
		332
		333	if ($self->{on_timeout}) {
		334	$self->{on_timeout}($self);
		335	} else {
		336	$! = Errno::ETIMEDOUT;
		337	$self->error;
		338	}
		339
		340	# callbakx 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
		349	$self->{_tw} \|\|= AnyEvent->timer (after => $after, cb => sub {
		350	delete $self->{_tw};
		351	$self->_timeout;
		352	});
		353	} else {
		354	delete $self->{_tw};
		355	}
249	}	356	}
250		357
251	#############################################################################	358	#############################################################################
252		359
253	=back	360	=back
…		…
290	=cut	397	=cut
291		398
292	sub _drain_wbuf {	399	sub _drain_wbuf {
293	my ($self) = @_;	400	my ($self) = @_;
294		401
295	if (!$self->{ww} && length $self->{wbuf}) {	402	if (!$self->{_ww} && length $self->{wbuf}) {
296		403
297	Scalar::Util::weaken $self;	404	Scalar::Util::weaken $self;
298		405
299	my $cb = sub {	406	my $cb = sub {
300	my $len = syswrite $self->{fh}, $self->{wbuf};	407	my $len = syswrite $self->{fh}, $self->{wbuf};
301		408
302	if ($len >= 0) {	409	if ($len >= 0) {
303	substr $self->{wbuf}, 0, $len, "";	410	substr $self->{wbuf}, 0, $len, "";
		411
		412	$self->{_activity} = AnyEvent->now;
304		413
305	$self->{on_drain}($self)	414	$self->{on_drain}($self)
306	if $self->{low_water_mark} >= length $self->{wbuf}	415	if $self->{low_water_mark} >= length $self->{wbuf}
307	&& $self->{on_drain};	416	&& $self->{on_drain};
308		417
309	delete $self->{ww} unless length $self->{wbuf};	418	delete $self->{_ww} unless length $self->{wbuf};
310	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAWOULDBLOCK) {	419	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
311	$self->error;	420	$self->error;
312	}	421	}
313	};	422	};
314		423
315	# try to write data immediately	424	# try to write data immediately
316	$cb->();	425	$cb->();
317		426
318	# if still data left in wbuf, we need to poll	427	# if still data left in wbuf, we need to poll
319	$self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)	428	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)
320	if length $self->{wbuf};	429	if length $self->{wbuf};
321	};	430	};
322	}	431	}
323		432
324	our %WH;	433	our %WH;
…		…
336	@_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write")	445	@_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write")
337	->($self, @_);	446	->($self, @_);
338	}	447	}
339		448
340	if ($self->{filter_w}) {	449	if ($self->{filter_w}) {
341	$self->{filter_w}->($self, \$_[0]);	450	$self->{filter_w}($self, \$_[0]);
342	} else {	451	} else {
343	$self->{wbuf} .= $_[0];	452	$self->{wbuf} .= $_[0];
344	$self->_drain_wbuf;	453	$self->_drain_wbuf;
345	}	454	}
346	}	455	}
…		…
370	my ($self, $string) = @_;	479	my ($self, $string) = @_;
371		480
372	sprintf "%d:%s,", (length $string), $string	481	sprintf "%d:%s,", (length $string), $string
373	};	482	};
374		483
		484	=item json => $array_or_hashref
		485
		486	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
		488	in UTF-8.
		489
		490	JSON objects (and arrays) are self-delimiting, so you can write JSON at
		491	one end of a handle and read them at the other end without using any
		492	additional framing.
		493
		494	The generated JSON text is guaranteed not to contain any newlines: While
		495	this module doesn't need delimiters after or between JSON texts to be
		496	able to read them, many other languages depend on that.
		497
		498	A simple RPC protocol that interoperates easily with others is to send
		499	JSON arrays (or objects, although arrays are usually the better choice as
		500	they mimic how function argument passing works) and a newline after each
		501	JSON text:
		502
		503	$handle->push_write (json => ["method", "arg1", "arg2"]); # whatever
		504	$handle->push_write ("\012");
		505
		506	An AnyEvent::Handle receiver would simply use the C<json> read type and
		507	rely on the fact that the newline will be skipped as leading whitespace:
		508
		509	$handle->push_read (json => sub { my $array = $_[1]; ... });
		510
		511	Other languages could read single lines terminated by a newline and pass
		512	this line into their JSON decoder of choice.
		513
		514	=cut
		515
		516	register_write_type json => sub {
		517	my ($self, $ref) = @_;
		518
		519	require JSON;
		520
		521	$self->{json} ? $self->{json}->encode ($ref)
		522	: JSON::encode_json ($ref)
		523	};
		524
375	=item AnyEvent::Handle::register_write_type type => $coderef->($self, @args)	525	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
376		526
377	This function (not method) lets you add your own types to C<push_write>.	527	This function (not method) lets you add your own types to C<push_write>.
378	Whenever the given C<type> is used, C<push_write> will invoke the code	528	Whenever the given C<type> is used, C<push_write> will invoke the code
379	reference with the handle object and the remaining arguments.	529	reference with the handle object and the remaining arguments.
380		530
…		…
480	return if $self->{in_drain};	630	return if $self->{in_drain};
481	local $self->{in_drain} = 1;	631	local $self->{in_drain} = 1;
482		632
483	while (my $len = length $self->{rbuf}) {	633	while (my $len = length $self->{rbuf}) {
484	no strict 'refs';	634	no strict 'refs';
485	if (my $cb = shift @{ $self->{queue} }) {	635	if (my $cb = shift @{ $self->{_queue} }) {
486	unless ($cb->($self)) {	636	unless ($cb->($self)) {
487	if ($self->{eof}) {	637	if ($self->{_eof}) {
488	# 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)
489	$! = &Errno::EPIPE;	639	$! = &Errno::EPIPE;
490	$self->error;	640	$self->error;
491	}	641	}
492		642
493	unshift @{ $self->{queue} }, $cb;	643	unshift @{ $self->{_queue} }, $cb;
494	return;	644	return;
495	}	645	}
496	} elsif ($self->{on_read}) {	646	} elsif ($self->{on_read}) {
497	$self->{on_read}($self);	647	$self->{on_read}($self);
498		648
499	if (	649	if (
500	$self->{eof} # if no further data will arrive	650	$self->{_eof} # if no further data will arrive
501	&& $len == length $self->{rbuf} # and no data has been consumed	651	&& $len == length $self->{rbuf} # and no data has been consumed
502	&& !@{ $self->{queue} } # and the queue is still empty	652	&& !@{ $self->{_queue} } # and the queue is still empty
503	&& $self->{on_read} # and we still want to read data	653	&& $self->{on_read} # and we still want to read data
504	) {	654	) {
505	# then no progress can be made	655	# then no progress can be made
506	$! = &Errno::EPIPE;	656	$! = &Errno::EPIPE;
507	$self->error;	657	$self->error;
508	}	658	}
509	} else {	659	} else {
510	# read side becomes idle	660	# read side becomes idle
511	delete $self->{rw};	661	delete $self->{_rw};
512	return;	662	return;
513	}	663	}
514	}	664	}
515		665
516	if ($self->{eof}) {
517	$self->_shutdown;
518	$self->{on_eof}($self)	666	$self->{on_eof}($self)
519	if $self->{on_eof};	667	if $self->{_eof} && $self->{on_eof};
520	}
521	}	668	}
522		669
523	=item $handle->on_read ($cb)	670	=item $handle->on_read ($cb)
524		671
525	This replaces the currently set C<on_read> callback, or clears it (when	672	This replaces the currently set C<on_read> callback, or clears it (when
…		…
587		734
588	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	735	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
589	->($self, $cb, @_);	736	->($self, $cb, @_);
590	}	737	}
591		738
592	push @{ $self->{queue} }, $cb;	739	push @{ $self->{_queue} }, $cb;
593	$self->_drain_rbuf;	740	$self->_drain_rbuf;
594	}	741	}
595		742
596	sub unshift_read {	743	sub unshift_read {
597	my $self = shift;	744	my $self = shift;
…		…
603	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read")	750	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read")
604	->($self, $cb, @_);	751	->($self, $cb, @_);
605	}	752	}
606		753
607		754
608	unshift @{ $self->{queue} }, $cb;	755	unshift @{ $self->{_queue} }, $cb;
609	$self->_drain_rbuf;	756	$self->_drain_rbuf;
610	}	757	}
611		758
612	=item $handle->push_read (type => @args, $cb)	759	=item $handle->push_read (type => @args, $cb)
613		760
…		…
620	Predefined types are (if you have ideas for additional types, feel free to	767	Predefined types are (if you have ideas for additional types, feel free to
621	drop by and tell us):	768	drop by and tell us):
622		769
623	=over 4	770	=over 4
624		771
625	=item chunk => $octets, $cb->($self, $data)	772	=item chunk => $octets, $cb->($handle, $data)
626		773
627	Invoke the callback only once C<$octets> bytes have been read. Pass the	774	Invoke the callback only once C<$octets> bytes have been read. Pass the
628	data read to the callback. The callback will never be called with less	775	data read to the callback. The callback will never be called with less
629	data.	776	data.
630		777
…		…
653		800
654	sub unshift_read_chunk {	801	sub unshift_read_chunk {
655	$_[0]->unshift_read (chunk => $_[1], $_[2]);	802	$_[0]->unshift_read (chunk => $_[1], $_[2]);
656	}	803	}
657		804
658	=item line => [$eol, ]$cb->($self, $line, $eol)	805	=item line => [$eol, ]$cb->($handle, $line, $eol)
659		806
660	The callback will be called only once a full line (including the end of	807	The callback will be called only once a full line (including the end of
661	line marker, C<$eol>) has been read. This line (excluding the end of line	808	line marker, C<$eol>) has been read. This line (excluding the end of line
662	marker) will be passed to the callback as second argument (C<$line>), and	809	marker) will be passed to the callback as second argument (C<$line>), and
663	the end of line marker as the third argument (C<$eol>).	810	the end of line marker as the third argument (C<$eol>).
…		…
700	sub unshift_read_line {	847	sub unshift_read_line {
701	my $self = shift;	848	my $self = shift;
702	$self->unshift_read (line => @_);	849	$self->unshift_read (line => @_);
703	}	850	}
704		851
705	=item netstring => $cb->($string)	852	=item netstring => $cb->($handle, $string)
706		853
707	A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement).	854	A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement).
708		855
709	Throws an error with C<$!> set to EBADMSG on format violations.	856	Throws an error with C<$!> set to EBADMSG on format violations.
710		857
…		…
738		885
739	1	886	1
740	}	887	}
741	};	888	};
742		889
743	=item regex => $accept[, $reject[, $skip], $cb->($data)	890	=item regex => $accept[, $reject[, $skip], $cb->($handle, $data)
744		891
745	Makes a regex match against the regex object C<$accept> and returns	892	Makes a regex match against the regex object C<$accept> and returns
746	everything up to and including the match.	893	everything up to and including the match.
747		894
748	Example: read a single line terminated by '\n'.	895	Example: read a single line terminated by '\n'.
…		…
809		956
810	()	957	()
811	}	958	}
812	};	959	};
813		960
		961	=item json => $cb->($handle, $hash_or_arrayref)
		962
		963	Reads a JSON object or array, decodes it and passes it to the callback.
		964
		965	If a C<json> object was passed to the constructor, then that will be used
		966	for the final decode, otherwise it will create a JSON coder expecting UTF-8.
		967
		968	This read type uses the incremental parser available with JSON version
		969	2.09 (and JSON::XS version 2.2) and above. You have to provide a
		970	dependency on your own: this module will load the JSON module, but
		971	AnyEvent does not depend on it itself.
		972
		973	Since JSON texts are fully self-delimiting, the C<json> read and write
		974	types are an ideal simple RPC protocol: just exchange JSON datagrams. See
		975	the C<json> write type description, above, for an actual example.
		976
		977	=cut
		978
		979	register_read_type json => sub {
		980	my ($self, $cb, $accept, $reject, $skip) = @_;
		981
		982	require JSON;
		983
		984	my $data;
		985	my $rbuf = \$self->{rbuf};
		986
		987	my $json = $self->{json} \|\|= JSON->new->utf8;
		988
		989	sub {
		990	my $ref = $json->incr_parse ($self->{rbuf});
		991
		992	if ($ref) {
		993	$self->{rbuf} = $json->incr_text;
		994	$json->incr_text = "";
		995	$cb->($self, $ref);
		996
		997	1
		998	} else {
		999	$self->{rbuf} = "";
		1000	()
		1001	}
		1002	}
		1003	};
		1004
814	=back	1005	=back
815		1006
816	=item AnyEvent::Handle::register_read_type type => $coderef->($self, $cb, @args)	1007	=item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args)
817		1008
818	This function (not method) lets you add your own types to C<push_read>.	1009	This function (not method) lets you add your own types to C<push_read>.
819		1010
820	Whenever the given C<type> is used, C<push_read> will invoke the code	1011	Whenever the given C<type> is used, C<push_read> will invoke the code
821	reference with the handle object, the callback and the remaining	1012	reference with the handle object, the callback and the remaining
…		…
823		1014
824	The code reference is supposed to return a callback (usually a closure)	1015	The code reference is supposed to return a callback (usually a closure)
825	that works as a plain read callback (see C<< ->push_read ($cb) >>).	1016	that works as a plain read callback (see C<< ->push_read ($cb) >>).
826		1017
827	It should invoke the passed callback when it is done reading (remember to	1018	It should invoke the passed callback when it is done reading (remember to
828	pass C<$self> as first argument as all other callbacks do that).	1019	pass C<$handle> as first argument as all other callbacks do that).
829		1020
830	Note that this is a function, and all types registered this way will be	1021	Note that this is a function, and all types registered this way will be
831	global, so try to use unique names.	1022	global, so try to use unique names.
832		1023
833	For examples, see the source of this module (F<perldoc -m AnyEvent::Handle>,	1024	For examples, see the source of this module (F<perldoc -m AnyEvent::Handle>,
…		…
845	=cut	1036	=cut
846		1037
847	sub stop_read {	1038	sub stop_read {
848	my ($self) = @_;	1039	my ($self) = @_;
849		1040
850	delete $self->{rw};	1041	delete $self->{_rw};
851	}	1042	}
852		1043
853	sub start_read {	1044	sub start_read {
854	my ($self) = @_;	1045	my ($self) = @_;
855		1046
856	unless ($self->{rw} \|\| $self->{eof}) {	1047	unless ($self->{_rw} \|\| $self->{_eof}) {
857	Scalar::Util::weaken $self;	1048	Scalar::Util::weaken $self;
858		1049
859	$self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {	1050	$self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {
860	my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf};	1051	my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf};
861	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} \|\| 8192, length $$rbuf;	1052	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} \|\| 8192, length $$rbuf;
862		1053
863	if ($len > 0) {	1054	if ($len > 0) {
		1055	$self->{_activity} = AnyEvent->now;
		1056
864	$self->{filter_r}	1057	$self->{filter_r}
865	? $self->{filter_r}->($self, $rbuf)	1058	? $self->{filter_r}($self, $rbuf)
866	: $self->_drain_rbuf;	1059	: $self->_drain_rbuf;
867		1060
868	} elsif (defined $len) {	1061	} elsif (defined $len) {
869	delete $self->{rw};	1062	delete $self->{_rw};
870	$self->{eof} = 1;	1063	$self->{_eof} = 1;
871	$self->_drain_rbuf;	1064	$self->_drain_rbuf;
872		1065
873	} elsif ($! != EAGAIN && $! != EINTR && $! != &AnyEvent::Util::WSAWOULDBLOCK) {	1066	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
874	return $self->error;	1067	return $self->error;
875	}	1068	}
876	});	1069	});
877	}	1070	}
878	}	1071	}
879		1072
880	sub _dotls {	1073	sub _dotls {
881	my ($self) = @_;	1074	my ($self) = @_;
882		1075
883	if (length $self->{tls_wbuf}) {	1076	if (length $self->{_tls_wbuf}) {
884	while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{tls_wbuf})) > 0) {	1077	while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
885	substr $self->{tls_wbuf}, 0, $len, "";	1078	substr $self->{_tls_wbuf}, 0, $len, "";
886	}	1079	}
887	}	1080	}
888		1081
889	if (defined (my $buf = Net::SSLeay::BIO_read ($self->{tls_wbio}))) {	1082	if (defined (my $buf = Net::SSLeay::BIO_read ($self->{_wbio}))) {
890	$self->{wbuf} .= $buf;	1083	$self->{wbuf} .= $buf;
891	$self->_drain_wbuf;	1084	$self->_drain_wbuf;
892	}	1085	}
893		1086
894	while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) {	1087	while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) {
…		…
920	C<"connect">, C<"accept"> or an existing Net::SSLeay object).	1113	C<"connect">, C<"accept"> or an existing Net::SSLeay object).
921		1114
922	The second argument is the optional C<Net::SSLeay::CTX> object that is	1115	The second argument is the optional C<Net::SSLeay::CTX> object that is
923	used when AnyEvent::Handle has to create its own TLS connection object.	1116	used when AnyEvent::Handle has to create its own TLS connection object.
924		1117
925	=cut	1118	The TLS connection object will end up in C<< $handle->{tls} >> after this
		1119	call and can be used or changed to your liking. Note that the handshake
		1120	might have already started when this function returns.
926		1121
927	# TODO: maybe document...	1122	=cut
		1123
928	sub starttls {	1124	sub starttls {
929	my ($self, $ssl, $ctx) = @_;	1125	my ($self, $ssl, $ctx) = @_;
930		1126
931	$self->stoptls;	1127	$self->stoptls;
932		1128
…		…
947	# http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html	1143	# http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html
948	Net::SSLeay::CTX_set_mode ($self->{tls},	1144	Net::SSLeay::CTX_set_mode ($self->{tls},
949	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)	1145	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)
950	\| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));	1146	\| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));
951		1147
952	$self->{tls_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1148	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
953	$self->{tls_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1149	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
954		1150
955	Net::SSLeay::set_bio ($ssl, $self->{tls_rbio}, $self->{tls_wbio});	1151	Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});
956		1152
957	$self->{filter_w} = sub {	1153	$self->{filter_w} = sub {
958	$_[0]{tls_wbuf} .= ${$_[1]};	1154	$_[0]{_tls_wbuf} .= ${$_[1]};
959	&_dotls;	1155	&_dotls;
960	};	1156	};
961	$self->{filter_r} = sub {	1157	$self->{filter_r} = sub {
962	Net::SSLeay::BIO_write ($_[0]{tls_rbio}, ${$_[1]});	1158	Net::SSLeay::BIO_write ($_[0]{_rbio}, ${$_[1]});
963	&_dotls;	1159	&_dotls;
964	};	1160	};
965	}	1161	}
966		1162
967	=item $handle->stoptls	1163	=item $handle->stoptls
…		…
973		1169
974	sub stoptls {	1170	sub stoptls {
975	my ($self) = @_;	1171	my ($self) = @_;
976		1172
977	Net::SSLeay::free (delete $self->{tls}) if $self->{tls};	1173	Net::SSLeay::free (delete $self->{tls}) if $self->{tls};
		1174
978	delete $self->{tls_rbio};	1175	delete $self->{_rbio};
979	delete $self->{tls_wbio};	1176	delete $self->{_wbio};
980	delete $self->{tls_wbuf};	1177	delete $self->{_tls_wbuf};
981	delete $self->{filter_r};	1178	delete $self->{filter_r};
982	delete $self->{filter_w};	1179	delete $self->{filter_w};
983	}	1180	}
984		1181
985	sub DESTROY {	1182	sub DESTROY {
…		…
1023	}	1220	}
1024	}	1221	}
1025		1222
1026	=back	1223	=back
1027		1224
		1225	=head1 SUBCLASSING AnyEvent::Handle
		1226
		1227	In many cases, you might want to subclass AnyEvent::Handle.
		1228
		1229	To make this easier, a given version of AnyEvent::Handle uses these
		1230	conventions:
		1231
		1232	=over 4
		1233
		1234	=item * all constructor arguments become object members.
		1235
		1236	At least initially, when you pass a C<tls>-argument to the constructor it
		1237	will end up in C<< $handle->{tls} >>. Those members might be changes or
		1238	mutated later on (for example C<tls> will hold the TLS connection object).
		1239
		1240	=item * other object member names are prefixed with an C<_>.
		1241
		1242	All object members not explicitly documented (internal use) are prefixed
		1243	with an underscore character, so the remaining non-C<_>-namespace is free
		1244	for use for subclasses.
		1245
		1246	=item * all members not documented here and not prefixed with an underscore
		1247	are free to use in subclasses.
		1248
		1249	Of course, new versions of AnyEvent::Handle may introduce more "public"
		1250	member variables, but thats just life, at least it is documented.
		1251
		1252	=back
		1253
1028	=head1 AUTHOR	1254	=head1 AUTHOR
1029		1255
1030	Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>.	1256	Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>.
1031		1257
1032	=cut	1258	=cut

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.37 by root, Mon May 26 20:02:22 2008 UTC vs. Revision 1.51 by root, Sat May 31 13:38:01 2008 UTC

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.37 by root, Mon May 26 20:02:22 2008 UTC vs.
Revision 1.51 by root, Sat May 31 13:38:01 2008 UTC