[ViewVC] Diff of: cvs/AnyEvent-HTTP/HTTP.pm

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.80 by root, Sat Jan 1 21:51:22 2011 UTC vs.
Revision 1.112 by root, Wed Nov 14 22:22:24 2012 UTC

…		…
15	This module is an L<AnyEvent> user, you need to make sure that you use and	15	This module is an L<AnyEvent> user, you need to make sure that you use and
16	run a supported event loop.	16	run a supported event loop.
17		17
18	This module implements a simple, stateless and non-blocking HTTP	18	This module implements a simple, stateless and non-blocking HTTP
19	client. It supports GET, POST and other request methods, cookies and more,	19	client. It supports GET, POST and other request methods, cookies and more,
20	all on a very low level. It can follow redirects supports proxies and	20	all on a very low level. It can follow redirects, supports proxies, and
21	automatically limits the number of connections to the values specified in	21	automatically limits the number of connections to the values specified in
22	the RFC.	22	the RFC.
23		23
24	It should generally be a "good client" that is enough for most HTTP	24	It should generally be a "good client" that is enough for most HTTP
25	tasks. Simple tasks should be simple, but complex tasks should still be	25	tasks. Simple tasks should be simple, but complex tasks should still be
…		…
36		36
37	=cut	37	=cut
38		38
39	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
40		40
41	use strict;	41	use common::sense;
42	no warnings;
43		42
44	use Errno ();	43	use Errno ();
45		44
46	use AnyEvent 5.0 ();	45	use AnyEvent 5.0 ();
47	use AnyEvent::Util ();	46	use AnyEvent::Util ();
48	use AnyEvent::Handle ();	47	use AnyEvent::Handle ();
49		48
50	use base Exporter::;	49	use base Exporter::;
51		50
52	our $VERSION = '1.5';	51	our $VERSION = '2.15';
53		52
54	our @EXPORT = qw(http_get http_post http_head http_request);	53	our @EXPORT = qw(http_get http_post http_head http_request);
55		54
56	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	55	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
57	our $MAX_RECURSE = 10;	56	our $MAX_RECURSE = 10;
58	our $MAX_PERSISTENT = 8;
59	our $PERSISTENT_TIMEOUT = 2;	57	our $PERSISTENT_TIMEOUT = 3;
60	our $TIMEOUT = 300;	58	our $TIMEOUT = 300;
61		59	our $MAX_PER_HOST = 4; # changing this is evil
62	# changing these is evil
63	our $MAX_PERSISTENT_PER_HOST = 0;
64	our $MAX_PER_HOST = 4;
65		60
66	our $PROXY;	61	our $PROXY;
67	our $ACTIVE = 0;	62	our $ACTIVE = 0;
68		63
69	my %KA_COUNT; # number of open keep-alive connections per host	64	my %KA_CACHE; # indexed by uhost currently, points to [$handle...] array
70	my %CO_SLOT; # number of open connections, and wait queue, per host	65	my %CO_SLOT; # number of open connections, and wait queue, per host
71		66
72	=item http_get $url, key => value..., $cb->($data, $headers)	67	=item http_get $url, key => value..., $cb->($data, $headers)
73		68
74	Executes an HTTP-GET request. See the http_request function for details on	69	Executes an HTTP-GET request. See the http_request function for details on
…		…
159		154
160	=over 4	155	=over 4
161		156
162	=item recurse => $count (default: $MAX_RECURSE)	157	=item recurse => $count (default: $MAX_RECURSE)
163		158
164	Whether to recurse requests or not, e.g. on redirects, authentication	159	Whether to recurse requests or not, e.g. on redirects, authentication and
165	retries and so on, and how often to do so.	160	other retries and so on, and how often to do so.
166		161
167	=item headers => hashref	162	=item headers => hashref
168		163
169	The request headers to use. Currently, C<http_request> may provide its own	164	The request headers to use. Currently, C<http_request> may provide its own
170	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and	165	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
171	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>	166	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>
172	(this can be suppressed by using C<undef> for these headers in which case	167	(this can be suppressed by using C<undef> for these headers in which case
173	they won't be sent at all).	168	they won't be sent at all).
174		169
		170	You really should provide your own C<User-Agent:> header value that is
		171	appropriate for your program - I wouldn't be surprised if the default
		172	AnyEvent string gets blocked by webservers sooner or later.
		173
		174	Also, make sure that your headers names and values do not contain any
		175	embedded newlines.
		176
175	=item timeout => $seconds	177	=item timeout => $seconds
176		178
177	The time-out to use for various stages - each connect attempt will reset	179	The time-out to use for various stages - each connect attempt will reset
178	the timeout, as will read or write activity, i.e. this is not an overall	180	the timeout, as will read or write activity, i.e. this is not an overall
179	timeout.	181	timeout.
180		182
181	Default timeout is 5 minutes.	183	Default timeout is 5 minutes.
182		184
183	=item proxy => [$host, $port[, $scheme]] or undef	185	=item proxy => [$host, $port[, $scheme]] or undef
184		186
185	Use the given http proxy for all requests. If not specified, then the	187	Use the given http proxy for all requests, or no proxy if C<undef> is
186	default proxy (as specified by C<$ENV{http_proxy}>) is used.	188	used.
187		189
188	C<$scheme> must be either missing, C<http> for HTTP or C<https> for	190	C<$scheme> must be either missing or must be C<http> for HTTP.
189	HTTPS.	191
		192	If not specified, then the default proxy is used (see
		193	C<AnyEvent::HTTP::set_proxy>).
190		194
191	=item body => $string	195	=item body => $string
192		196
193	The request body, usually empty. Will be sent as-is (future versions of	197	The request body, usually empty. Will be sent as-is (future versions of
194	this module might offer more options).	198	this module might offer more options).
…		…
224	verification, highest compatibility) and high-security (CA and common-name	228	verification, highest compatibility) and high-security (CA and common-name
225	verification) TLS context.	229	verification) TLS context.
226		230
227	The default for this option is C<low>, which could be interpreted as "give	231	The default for this option is C<low>, which could be interpreted as "give
228	me the page, no matter what".	232	me the page, no matter what".
		233
		234	See also the C<sessionid> parameter.
		235
		236	=item session => $string
		237
		238	The module might reuse connections to the same host internally. Sometimes
		239	(e.g. when using TLS), you do not want to reuse connections from other
		240	sessions. This can be achieved by setting this parameter to some unique
		241	ID (such as the address of an object storing your state data, or the TLS
		242	context) - only connections using the same unique ID will be reused.
229		243
230	=item on_prepare => $callback->($fh)	244	=item on_prepare => $callback->($fh)
231		245
232	In rare cases you need to "tune" the socket before it is used to	246	In rare cases you need to "tune" the socket before it is used to
233	connect (for exmaple, to bind it on a given IP address). This parameter	247	connect (for exmaple, to bind it on a given IP address). This parameter
…		…
303	called. Instead of the C<$body> argument containing the body data, the	317	called. Instead of the C<$body> argument containing the body data, the
304	callback will receive the L<AnyEvent::Handle> object associated with the	318	callback will receive the L<AnyEvent::Handle> object associated with the
305	connection. In error cases, C<undef> will be passed. When there is no body	319	connection. In error cases, C<undef> will be passed. When there is no body
306	(e.g. status C<304>), the empty string will be passed.	320	(e.g. status C<304>), the empty string will be passed.
307		321
308	The handle object might or might not be in TLS mode, might be connected to	322	The handle object might or might not be in TLS mode, might be connected
309	a proxy, be a persistent connection etc., and configured in unspecified	323	to a proxy, be a persistent connection, use chunked transfer encoding
310	ways. The user is responsible for this handle (it will not be used by this	324	etc., and configured in unspecified ways. The user is responsible for this
311	module anymore).	325	handle (it will not be used by this module anymore).
312		326
313	This is useful with some push-type services, where, after the initial	327	This is useful with some push-type services, where, after the initial
314	headers, an interactive protocol is used (typical example would be the	328	headers, an interactive protocol is used (typical example would be the
315	push-style twitter API which starts a JSON/XML stream).	329	push-style twitter API which starts a JSON/XML stream).
316		330
317	If you think you need this, first have a look at C<on_body>, to see if	331	If you think you need this, first have a look at C<on_body>, to see if
318	that doesn't solve your problem in a better way.	332	that doesn't solve your problem in a better way.
		333
		334	=item persistent => $boolean
		335
		336	Try to create/reuse a persistent connection. When this flag is set
		337	(default: true for idempotent requests, false for all others), then
		338	C<http_request> tries to re-use an existing (previously-created)
		339	persistent connection to the host and, failing that, tries to create a new
		340	one.
		341
		342	Requests failing in certain ways will be automatically retried once, which
		343	is dangerous for non-idempotent requests, which is why it defaults to off
		344	for them. The reason for this is because the bozos who designed HTTP/1.1
		345	made it impossible to distinguish between a fatal error and a normal
		346	connection timeout, so you never know whether there was a problem with
		347	your request or not.
		348
		349	When reusing an existent connection, many parameters (such as TLS context)
		350	will be ignored. See the C<session> parameter for a workaround.
		351
		352	=item keepalive => $boolean
		353
		354	Only used when C<persistent> is also true. This parameter decides whether
		355	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		356	(as opposed to only a HTTP/1.1 persistent connection).
		357
		358	The default is true, except when using a proxy, in which case it defaults
		359	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		360
		361	=item handle_params => { key => value ... }
		362
		363	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		364	constructor that is called - not all requests will create a handle, and
		365	sometimes more than one is created, so this parameter is only good for
		366	setting hints.
		367
		368	Example: set the maximum read size to 4096, to potentially conserve memory
		369	at the cost of speed.
		370
		371	handle_params => {
		372	max_read_size => 4096,
		373	},
319		374
320	=back	375	=back
321		376
322	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	377	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
323	the response body.	378	the response body.
…		…
329		384
330	Example: do a HTTP HEAD request on https://www.google.com/, use a	385	Example: do a HTTP HEAD request on https://www.google.com/, use a
331	timeout of 30 seconds.	386	timeout of 30 seconds.
332		387
333	http_request	388	http_request
334	GET => "https://www.google.com",	389	HEAD => "https://www.google.com",
		390	headers => { "user-agent" => "MySearchClient 1.0" },
335	timeout => 30,	391	timeout => 30,
336	sub {	392	sub {
337	my ($body, $hdr) = @_;	393	my ($body, $hdr) = @_;
338	use Data::Dumper;	394	use Data::Dumper;
339	print Dumper $hdr;	395	print Dumper $hdr;
…		…
349	};	405	};
350		406
351	undef $request;	407	undef $request;
352		408
353	=cut	409	=cut
		410
		411	#############################################################################
		412	# wait queue/slots
354		413
355	sub _slot_schedule;	414	sub _slot_schedule;
356	sub _slot_schedule($) {	415	sub _slot_schedule($) {
357	my $host = shift;	416	my $host = shift;
358		417
…		…
381		440
382	_slot_schedule $_[0];	441	_slot_schedule $_[0];
383	}	442	}
384		443
385	#############################################################################	444	#############################################################################
		445	# cookie handling
386		446
387	# expire cookies	447	# expire cookies
388	sub cookie_jar_expire($;$) {	448	sub cookie_jar_expire($;$) {
389	my ($jar, $session_end) = @_;	449	my ($jar, $session_end) = @_;
390		450
…		…
414	}	474	}
415	}	475	}
416		476
417	# extract cookies from jar	477	# extract cookies from jar
418	sub cookie_jar_extract($$$$) {	478	sub cookie_jar_extract($$$$) {
419	my ($jar, $uscheme, $uhost, $upath) = @_;	479	my ($jar, $scheme, $host, $path) = @_;
420		480
421	%$jar = () if $jar->{version} != 1;	481	%$jar = () if $jar->{version} != 1;
422		482
423	my @cookies;	483	my @cookies;
424		484
425	while (my ($chost, $paths) = each %$jar) {	485	while (my ($chost, $paths) = each %$jar) {
426	next unless ref $paths;	486	next unless ref $paths;
427		487
428	if ($chost =~ /^\./) {	488	if ($chost =~ /^\./) {
429	next unless $chost eq substr $uhost, -length $chost;	489	next unless $chost eq substr $host, -length $chost;
430	} elsif ($chost =~ /\./) {	490	} elsif ($chost =~ /\./) {
431	next unless $chost eq $uhost;	491	next unless $chost eq $host;
432	} else {	492	} else {
433	next;	493	next;
434	}	494	}
435		495
436	while (my ($cpath, $cookies) = each %$paths) {	496	while (my ($cpath, $cookies) = each %$paths) {
437	next unless $cpath eq substr $upath, 0, length $cpath;	497	next unless $cpath eq substr $path, 0, length $cpath;
438		498
439	while (my ($cookie, $kv) = each %$cookies) {	499	while (my ($cookie, $kv) = each %$cookies) {
440	next if $uscheme ne "https" && exists $kv->{secure};	500	next if $scheme ne "https" && exists $kv->{secure};
441		501
442	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {	502	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
443	delete $cookies->{$cookie};	503	delete $cookies->{$cookie};
444	next;	504	next;
445	}	505	}
…		…
459	\@cookies	519	\@cookies
460	}	520	}
461		521
462	# parse set_cookie header into jar	522	# parse set_cookie header into jar
463	sub cookie_jar_set_cookie($$$$) {	523	sub cookie_jar_set_cookie($$$$) {
464	my ($jar, $set_cookie, $uhost, $date) = @_;	524	my ($jar, $set_cookie, $host, $date) = @_;
465		525
466	my $anow = int AE::now;	526	my $anow = int AE::now;
467	my $snow; # server-now	527	my $snow; # server-now
468		528
469	for ($set_cookie) {	529	for ($set_cookie) {
…		…
475	while (	535	while (
476	m{	536	m{
477	\G\s*	537	\G\s*
478	(?:	538	(?:
479	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)	539	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
480	\| ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )	540	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^;,[:space:]]) ) )?
481	)	541	)
482	}gcxsi	542	}gcxsi
483	) {	543	) {
484	my $name = $2;	544	my $name = $2;
485	my $value = $4;	545	my $value = $4;
486		546
487	unless (defined $name) {	547	if (defined $1) {
488	# expires	548	# expires
489	$name = "expires";	549	$name = "expires";
490	$value = $1;	550	$value = $1;
491	} elsif (!defined $value) {	551	} elsif (defined $3) {
492	# quoted	552	# quoted
493	$value = $3;	553	$value = $3;
494	$value =~ s/\\(.)/$1/gs;	554	$value =~ s/\\(.)/$1/gs;
495	}	555	}
496		556
497	push @kv, lc $name, $value;	557	push @kv, @kv ? lc $name : $name, $value;
498		558
499	last unless /\G\s*;/gc;	559	last unless /\G\s*;/gc;
500	}	560	}
501		561
502	last unless @kv;	562	last unless @kv;
…		…
525		585
526	# this is not rfc-like and not netscape-like. go figure.	586	# this is not rfc-like and not netscape-like. go figure.
527	my $ndots = $cdom =~ y/.//;	587	my $ndots = $cdom =~ y/.//;
528	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	588	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
529	} else {	589	} else {
530	$cdom = $uhost;	590	$cdom = $host;
531	}	591	}
532		592
533	# store it	593	# store it
534	$jar->{version} = 1;	594	$jar->{version} = 1;
535	$jar->{$cdom}{$cpath}{$name} = \%kv;	595	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
536		596
537	redo if /\G\s*,/gc;	597	redo if /\G\s*,/gc;
538	}	598	}
539	}	599	}
540		600
		601	#############################################################################
		602	# keepalive/persistent connection cache
		603
		604	# fetch a connection from the keepalive cache
		605	sub ka_fetch($) {
		606	my $ka_key = shift;
		607
		608	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		609	delete $KA_CACHE{$ka_key}
		610	unless @{ $KA_CACHE{$ka_key} };
		611
		612	$hdl
		613	}
		614
		615	sub ka_store($$) {
		616	my ($ka_key, $hdl) = @_;
		617
		618	my $kaa = $KA_CACHE{$ka_key} \|\|= [];
		619
		620	my $destroy = sub {
		621	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		622
		623	$hdl->destroy;
		624
		625	@ka
		626	? $KA_CACHE{$ka_key} = \@ka
		627	: delete $KA_CACHE{$ka_key};
		628	};
		629
		630	# on error etc., destroy
		631	$hdl->on_error ($destroy);
		632	$hdl->on_eof ($destroy);
		633	$hdl->on_read ($destroy);
		634	$hdl->timeout ($PERSISTENT_TIMEOUT);
		635
		636	push @$kaa, $hdl;
		637	shift @$kaa while @$kaa > $MAX_PER_HOST;
		638	}
		639
		640	#############################################################################
		641	# utilities
		642
541	# continue to parse $_ for headers and place them into the arg	643	# continue to parse $_ for headers and place them into the arg
542	sub parse_hdr() {	644	sub _parse_hdr() {
543	my %hdr;	645	my %hdr;
544		646
545	# things seen, not parsed:	647	# things seen, not parsed:
546	# p3pP="NON CUR OTPi OUR NOR UNI"	648	# p3pP="NON CUR OTPi OUR NOR UNI"
547		649
…		…
561	for values %hdr;	663	for values %hdr;
562		664
563	\%hdr	665	\%hdr
564	}	666	}
565		667
		668	#############################################################################
		669	# http_get
		670
566	our $qr_nlnl = qr{(?<![^\012])\015?\012};	671	our $qr_nlnl = qr{(?<![^\012])\015?\012};
567		672
568	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	673	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
569	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	674	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		675
		676	# maybe it should just become a normal object :/
		677
		678	sub _destroy_state(\%) {
		679	my ($state) = @_;
		680
		681	$state->{handle}->destroy if $state->{handle};
		682	%$state = ();
		683	}
		684
		685	sub _error(\%$$) {
		686	my ($state, $cb, $hdr) = @_;
		687
		688	&_destroy_state ($state);
		689
		690	$cb->(undef, $hdr);
		691	()
		692	}
570		693
571	sub http_request($$@) {	694	sub http_request($$@) {
572	my $cb = pop;	695	my $cb = pop;
573	my ($method, $url, %arg) = @_;	696	my ($method, $url, %arg) = @_;
574		697
…		…
592	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	715	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
593		716
594	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	717	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
595	if $recurse < 0;	718	if $recurse < 0;
596		719
597	my $proxy = $arg{proxy} \|\| $PROXY;	720	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
598	my $timeout = $arg{timeout} \|\| $TIMEOUT;	721	my $timeout = $arg{timeout} \|\| $TIMEOUT;
599		722
600	my ($uscheme, $uauthority, $upath, $query, $fragment) =	723	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
601	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;	724	$url =~ m\|^([^:]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
602		725
603	$uscheme = lc $uscheme;	726	$uscheme = lc $uscheme;
604		727
605	my $uport = $uscheme eq "http" ? 80	728	my $uport = $uscheme eq "http" ? 80
606	: $uscheme eq "https" ? 443	729	: $uscheme eq "https" ? 443
607	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });	730	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
608		731
609	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	732	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
610	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	733	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
611		734
612	my $uhost = $1;	735	my $uhost = lc $1;
613	$uport = $2 if defined $2;	736	$uport = $2 if defined $2;
614		737
615	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	738	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
616	unless exists $hdr{host};	739	unless exists $hdr{host};
617		740
…		…
636	$rscheme = "http" unless defined $rscheme;	759	$rscheme = "http" unless defined $rscheme;
637		760
638	# don't support https requests over https-proxy transport,	761	# don't support https requests over https-proxy transport,
639	# can't be done with tls as spec'ed, unless you double-encrypt.	762	# can't be done with tls as spec'ed, unless you double-encrypt.
640	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	763	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		764
		765	$rhost = lc $rhost;
		766	$rscheme = lc $rscheme;
641	} else {	767	} else {
642	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	768	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
643	}	769	}
644		770
645	# leave out fragment and query string, just a heuristic	771	# leave out fragment and query string, just a heuristic
…		…
647	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	773	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
648		774
649	$hdr{"content-length"} = length $arg{body}	775	$hdr{"content-length"} = length $arg{body}
650	if length $arg{body} \|\| $method ne "GET";	776	if length $arg{body} \|\| $method ne "GET";
651		777
652	$hdr{connection} = "close TE"; #1.1	778	my $idempotent = $method =~ /^(?:GET\|HEAD\|PUT\|DELETE\|OPTIONS\|TRACE)$/;
		779
		780	# default value for keepalive is true iff the request is for an idempotent method
		781	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
		782	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
		783	my $was_persistent; # true if this is actually a recycled connection
		784
		785	# the key to use in the keepalive cache
		786	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		787
		788	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive " : "" : "close ") . "Te"; #1.1
653	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	789	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
654		790
655	my %state = (connect_guard => 1);	791	my %state = (connect_guard => 1);
		792
		793	my $ae_error = 595; # connecting
		794
		795	# handle actual, non-tunneled, request
		796	my $handle_actual_request = sub {
		797	$ae_error = 596; # request phase
		798
		799	my $hdl = $state{handle};
		800
		801	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
		802
		803	# send request
		804	$hdl->push_write (
		805	"$method $rpath HTTP/1.1\015\012"
		806	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		807	. "\015\012"
		808	. (delete $arg{body})
		809	);
		810
		811	# return if error occured during push_write()
		812	return unless %state;
		813
		814	# reduce memory usage, save a kitten, also re-use it for the response headers.
		815	%hdr = ();
		816
		817	# status line and headers
		818	$state{read_response} = sub {
		819	return unless %state;
		820
		821	for ("$_[1]") {
		822	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		823
		824	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
		825	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
		826
		827	# 100 Continue handling
		828	# should not happen as we don't send expect: 100-continue,
		829	# but we handle it just in case.
		830	# since we send the request body regardless, if we get an error
		831	# we are out of-sync, which we currently do NOT handle correctly.
		832	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		833	if $2 eq 100;
		834
		835	push @pseudo,
		836	HTTPVersion => $1,
		837	Status => $2,
		838	Reason => $3,
		839	;
		840
		841	my $hdr = _parse_hdr
		842	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
		843
		844	%hdr = (%$hdr, @pseudo);
		845	}
		846
		847	# redirect handling
		848	# microsoft and other shitheads don't give a shit for following standards,
		849	# try to support some common forms of broken Location headers.
		850	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		851	$hdr{location} =~ s/^\.\/+//;
		852
		853	my $url = "$rscheme://$uhost:$uport";
		854
		855	unless ($hdr{location} =~ s/^\///) {
		856	$url .= $upath;
		857	$url =~ s/\/[^\/]*$//;
		858	}
		859
		860	$hdr{location} = "$url/$hdr{location}";
		861	}
		862
		863	my $redirect;
		864
		865	if ($recurse) {
		866	my $status = $hdr{Status};
		867
		868	# industry standard is to redirect POST as GET for
		869	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		870	# also, the UA should ask the user for 301 and 307 and POST,
		871	# industry standard seems to be to simply follow.
		872	# we go with the industry standard.
		873	if ($status == 301 or $status == 302 or $status == 303) {
		874	# HTTP/1.1 is unclear on how to mutate the method
		875	$method = "GET" unless $method eq "HEAD";
		876	$redirect = 1;
		877	} elsif ($status == 307) {
		878	$redirect = 1;
		879	}
		880	}
		881
		882	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
		883	if ($state{handle}) {
		884	# handle keepalive
		885	if (
		886	$persistent
		887	&& $_[3]
		888	&& ($hdr{HTTPVersion} < 1.1
		889	? $hdr{connection} =~ /\bkeep-?alive\b/i
		890	: $hdr{connection} !~ /\bclose\b/i)
		891	) {
		892	ka_store $ka_key, delete $state{handle};
		893	} else {
		894	# no keepalive, destroy the handle
		895	$state{handle}->destroy;
		896	}
		897	}
		898
		899	%state = ();
		900
		901	if (defined $_[1]) {
		902	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		903	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		904	}
		905
		906	# set-cookie processing
		907	if ($arg{cookie_jar}) {
		908	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		909	}
		910
		911	if ($redirect && exists $hdr{location}) {
		912	# we ignore any errors, as it is very common to receive
		913	# Content-Length != 0 but no actual body
		914	# we also access %hdr, as $_[1] might be an erro
		915	$state{recurse} =
		916	http_request (
		917	$method => $hdr{location},
		918	%arg,
		919	recurse => $recurse - 1,
		920	Redirect => [$_[0], \%hdr],
		921	sub {
		922	%state = ();
		923	&$cb
		924	},
		925	);
		926	} else {
		927	$cb->($_[0], \%hdr);
		928	}
		929	};
		930
		931	$ae_error = 597; # body phase
		932
		933	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		934
		935	my $len = $chunked ? undef : $hdr{"content-length"};
		936
		937	# body handling, many different code paths
		938	# - no body expected
		939	# - want_body_handle
		940	# - te chunked
		941	# - 2x length known (with or without on_body)
		942	# - 2x length not known (with or without on_body)
		943	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		944	$finish->(undef, 598 => "Request cancelled by on_header");
		945	} elsif (
		946	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		947	or $method eq "HEAD"
		948	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		949	) {
		950	# no body
		951	$finish->("", undef, undef, 1);
		952
		953	} elsif (!$redirect && $arg{want_body_handle}) {
		954	$_[0]->on_eof (undef);
		955	$_[0]->on_error (undef);
		956	$_[0]->on_read (undef);
		957
		958	$finish->(delete $state{handle});
		959
		960	} elsif ($chunked) {
		961	my $cl = 0;
		962	my $body = "";
		963	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		964
		965	$state{read_chunk} = sub {
		966	$_[1] =~ /^([0-9a-fA-F]+)/
		967	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		968
		969	my $len = hex $1;
		970
		971	if ($len) {
		972	$cl += $len;
		973
		974	$_[0]->push_read (chunk => $len, sub {
		975	$on_body->($_[1], \%hdr)
		976	or return $finish->(undef, 598 => "Request cancelled by on_body");
		977
		978	$_[0]->push_read (line => sub {
		979	length $_[1]
		980	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		981	$_[0]->push_read (line => $state{read_chunk});
		982	});
		983	});
		984	} else {
		985	$hdr{"content-length"} \|\|= $cl;
		986
		987	$_[0]->push_read (line => $qr_nlnl, sub {
		988	if (length $_[1]) {
		989	for ("$_[1]") {
		990	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		991
		992	my $hdr = _parse_hdr
		993	or return $finish->(undef, $ae_error => "Garbled response trailers");
		994
		995	%hdr = (%hdr, %$hdr);
		996	}
		997	}
		998
		999	$finish->($body, undef, undef, 1);
		1000	});
		1001	}
		1002	};
		1003
		1004	$_[0]->push_read (line => $state{read_chunk});
		1005
		1006	} elsif ($arg{on_body}) {
		1007	if (defined $len) {
		1008	$_[0]->on_read (sub {
		1009	$len -= length $_[0]{rbuf};
		1010
		1011	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1012	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1013
		1014	$len > 0
		1015	or $finish->("", undef, undef, 1);
		1016	});
		1017	} else {
		1018	$_[0]->on_eof (sub {
		1019	$finish->("");
		1020	});
		1021	$_[0]->on_read (sub {
		1022	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1023	or $finish->(undef, 598 => "Request cancelled by on_body");
		1024	});
		1025	}
		1026	} else {
		1027	$_[0]->on_eof (undef);
		1028
		1029	if (defined $len) {
		1030	$_[0]->on_read (sub {
		1031	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1032	if $len <= length $_[0]{rbuf};
		1033	});
		1034	} else {
		1035	$_[0]->on_error (sub {
		1036	($! == Errno::EPIPE \|\| !$!)
		1037	? $finish->(delete $_[0]{rbuf})
		1038	: $finish->(undef, $ae_error => $_[2]);
		1039	});
		1040	$_[0]->on_read (sub { });
		1041	}
		1042	}
		1043	};
		1044
		1045	# if keepalive is enabled, then the server closing the connection
		1046	# before a response can happen legally - we retry on idempotent methods.
		1047	if ($was_persistent && $idempotent) {
		1048	my $old_eof = $hdl->{on_eof};
		1049	$hdl->{on_eof} = sub {
		1050	_destroy_state %state;
		1051
		1052	%state = ();
		1053	$state{recurse} =
		1054	http_request (
		1055	$method => $url,
		1056	%arg,
		1057	recurse => $recurse - 1,
		1058	keepalive => 0,
		1059	sub {
		1060	%state = ();
		1061	&$cb
		1062	}
		1063	);
		1064	};
		1065	$hdl->on_read (sub {
		1066	return unless %state;
		1067
		1068	# as soon as we receive something, a connection close
		1069	# once more becomes a hard error
		1070	$hdl->{on_eof} = $old_eof;
		1071	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1072	});
		1073	} else {
		1074	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1075	}
		1076	};
		1077
		1078	my $prepare_handle = sub {
		1079	my ($hdl) = $state{handle};
		1080
		1081	$hdl->on_error (sub {
		1082	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1083	});
		1084	$hdl->on_eof (sub {
		1085	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1086	});
		1087	$hdl->timeout_reset;
		1088	$hdl->timeout ($timeout);
		1089	};
		1090
		1091	# connected to proxy (or origin server)
		1092	my $connect_cb = sub {
		1093	my $fh = shift
		1094	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1095
		1096	return unless delete $state{connect_guard};
		1097
		1098	# get handle
		1099	$state{handle} = new AnyEvent::Handle
		1100	%{ $arg{handle_params} },
		1101	fh => $fh,
		1102	peername => $uhost,
		1103	tls_ctx => $arg{tls_ctx},
		1104	;
		1105
		1106	$prepare_handle->();
		1107
		1108	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1109
		1110	# now handle proxy-CONNECT method
		1111	if ($proxy && $uscheme eq "https") {
		1112	# oh dear, we have to wrap it into a connect request
		1113
		1114	# maybe re-use $uauthority with patched port?
		1115	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");
		1116	$state{handle}->push_read (line => $qr_nlnl, sub {
		1117	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1118	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1119
		1120	if ($2 == 200) {
		1121	$rpath = $upath;
		1122	$handle_actual_request->();
		1123	} else {
		1124	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1125	}
		1126	});
		1127	} else {
		1128	$handle_actual_request->();
		1129	}
		1130	};
656		1131
657	_get_slot $uhost, sub {	1132	_get_slot $uhost, sub {
658	$state{slot_guard} = shift;	1133	$state{slot_guard} = shift;
659		1134
660	return unless $state{connect_guard};	1135	return unless $state{connect_guard};
661		1136
662	my $ae_error = 595; # connecting	1137	# try to use an existing keepalive connection, but only if we, ourselves, plan
		1138	# on a keepalive request (in theory, this should be a separate config option).
		1139	if ($persistent && $KA_CACHE{$ka_key}) {
		1140	$was_persistent = 1;
663		1141
664	my $connect_cb = sub {	1142	$state{handle} = ka_fetch $ka_key;
665	$state{fh} = shift
666	or do {
667	my $err = "$!";
668	%state = ();
669	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });
670	};
671
672	return unless delete $state{connect_guard};
673
674	# get handle
675	$state{handle} = new AnyEvent::Handle
676	fh => $state{fh},
677	peername => $rhost,
678	tls_ctx => $arg{tls_ctx},
679	# these need to be reconfigured on keepalive handles
680	timeout => $timeout,
681	on_error => sub {
682	%state = ();
683	$cb->(undef, { @pseudo, Status => $ae_error, Reason => $_[2] });
684	},
685	on_eof => sub {
686	%state = ();
687	$cb->(undef, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" });
688	},
689	;
690
691	# limit the number of persistent connections
692	# keepalive not yet supported
693	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
694	# ++$KA_COUNT{$_[1]};
695	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
696	# --$KA_COUNT{$_[1]}
697	# };
698	# $hdr{connection} = "keep-alive";
699	# }
700
701	$state{handle}->starttls ("connect") if $rscheme eq "https";
702
703	# handle actual, non-tunneled, request
704	my $handle_actual_request = sub {
705	$ae_error = 596; # request phase
706
707	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
708
709	# send request
710	$state{handle}->push_write (	1143	$state{handle}->destroyed
711	"$method $rpath HTTP/1.1\015\012"	1144	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
712	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)	1145	$prepare_handle->();
713	. "\015\012"	1146	$state{handle}->destroyed
714	. (delete $arg{body})	1147	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
715	);
716
717	# return if error occured during push_write()
718	return unless %state;
719
720	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
721
722	# status line and headers
723	$state{read_response} = sub {
724	for ("$_[1]") {
725	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
726
727	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
728	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
729
730	# 100 Continue handling
731	# should not happen as we don't send expect: 100-continue,
732	# but we handle it just in case.
733	# since we send the request body regardless, if we get an error
734	# we are out of-sync, which we currently do NOT handle correctly.
735	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
736	if $2 eq 100;
737
738	push @pseudo,
739	HTTPVersion => $1,
740	Status => $2,
741	Reason => $3,
742	;
743
744	my $hdr = parse_hdr
745	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
746
747	%hdr = (%$hdr, @pseudo);
748	}
749
750	# redirect handling
751	# microsoft and other shitheads don't give a shit for following standards,
752	# try to support some common forms of broken Location headers.
753	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
754	$hdr{location} =~ s/^\.\/+//;
755
756	my $url = "$rscheme://$uhost:$uport";
757
758	unless ($hdr{location} =~ s/^\///) {
759	$url .= $upath;
760	$url =~ s/\/[^\/]*$//;
761	}
762
763	$hdr{location} = "$url/$hdr{location}";
764	}
765
766	my $redirect;
767
768	if ($recurse) {
769	my $status = $hdr{Status};
770
771	# industry standard is to redirect POST as GET for
772	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
773	# also, the UA should ask the user for 301 and 307 and POST,
774	# industry standard seems to be to simply follow.
775	# we go with the industry standard.
776	if ($status == 301 or $status == 302 or $status == 303) {
777	# HTTP/1.1 is unclear on how to mutate the method
778	$method = "GET" unless $method eq "HEAD";
779	$redirect = 1;
780	} elsif ($status == 307) {
781	$redirect = 1;
782	}
783	}
784
785	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
786	my $may_keep_alive = $_[3];
787
788	$state{handle}->destroy if $state{handle};
789	%state = ();
790
791	if (defined $_[1]) {
792	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
793	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
794	}
795
796	# set-cookie processing
797	if ($arg{cookie_jar}) {
798	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
799	}
800
801	if ($redirect && exists $hdr{location}) {
802	# we ignore any errors, as it is very common to receive
803	# Content-Length != 0 but no actual body
804	# we also access %hdr, as $_[1] might be an erro
805	http_request (
806	$method => $hdr{location},
807	%arg,
808	recurse => $recurse - 1,
809	Redirect => [$_[0], \%hdr],
810	$cb);
811	} else {
812	$cb->($_[0], \%hdr);
813	}
814	};
815
816	$ae_error = 597; # body phase
817
818	my $len = $hdr{"content-length"};
819
820	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
821	$finish->(undef, 598 => "Request cancelled by on_header");
822	} elsif (
823	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
824	or $method eq "HEAD"
825	or (defined $len && !$len)
826	) {
827	# no body
828	$finish->("", undef, undef, 1);
829	} else {
830	# body handling, many different code paths
831	# - no body expected
832	# - want_body_handle
833	# - te chunked
834	# - 2x length known (with or without on_body)
835	# - 2x length not known (with or without on_body)
836	if (!$redirect && $arg{want_body_handle}) {
837	$_[0]->on_eof (undef);
838	$_[0]->on_error (undef);
839	$_[0]->on_read (undef);
840
841	$finish->(delete $state{handle});
842
843	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
844	my $cl = 0;
845	my $body = undef;
846	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
847
848	my $read_chunk; $read_chunk = sub {
849	$_[1] =~ /^([0-9a-fA-F]+)/
850	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
851
852	my $len = hex $1;
853
854	if ($len) {
855	$cl += $len;
856
857	$_[0]->push_read (chunk => $len, sub {
858	$on_body->($_[1], \%hdr)
859	or return $finish->(undef, 598 => "Request cancelled by on_body");
860
861	$_[0]->push_read (line => sub {
862	length $_[1]
863	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
864	$_[0]->push_read (line => $read_chunk);
865	});
866	});
867	} else {
868	$hdr{"content-length"} \|\|= $cl;
869
870	$_[0]->push_read (line => $qr_nlnl, sub {
871	if (length $_[1]) {
872	for ("$_[1]") {
873	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
874
875	my $hdr = parse_hdr
876	or return $finish->(undef, $ae_error => "Garbled response trailers");
877
878	%hdr = (%hdr, %$hdr);
879	}
880	}
881
882	$finish->($body, undef, undef, 1);
883	});
884	}
885	};
886
887	$_[0]->push_read (line => $read_chunk);
888
889	} elsif ($arg{on_body}) {
890	if ($len) {
891	$_[0]->on_read (sub {
892	$len -= length $_[0]{rbuf};
893
894	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
895	or return $finish->(undef, 598 => "Request cancelled by on_body");
896
897	$len > 0
898	or $finish->("", undef, undef, 1);
899	});
900	} else {
901	$_[0]->on_eof (sub {
902	$finish->("");
903	});
904	$_[0]->on_read (sub {
905	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
906	or $finish->(undef, 598 => "Request cancelled by on_body");
907	});
908	}
909	} else {
910	$_[0]->on_eof (undef);
911
912	if ($len) {
913	$_[0]->on_read (sub {
914	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
915	if $len <= length $_[0]{rbuf};
916	});
917	} else {
918	$_[0]->on_error (sub {
919	($! == Errno::EPIPE \|\| !$!)
920	? $finish->(delete $_[0]{rbuf})
921	: $finish->(undef, $ae_error => $_[2]);
922	});
923	$_[0]->on_read (sub { });
924	}
925	}
926	}
927	};
928
929	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
930	};
931
932	# now handle proxy-CONNECT method
933	if ($proxy && $uscheme eq "https") {
934	# oh dear, we have to wrap it into a connect request
935
936	# maybe re-use $uauthority with patched port?
937	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
938	$state{handle}->push_read (line => $qr_nlnl, sub {
939	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
940	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
941
942	if ($2 == 200) {
943	$rpath = $upath;
944	&$handle_actual_request;	1148	$handle_actual_request->();
945	} else {	1149
946	%state = ();
947	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
948	}
949	});
950	} else {	1150	} else {
951	&$handle_actual_request;
952	}
953	};
954
955	my $tcp_connect = $arg{tcp_connect}	1151	my $tcp_connect = $arg{tcp_connect}
956	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1152	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
957		1153
958	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });	1154	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
959		1155	}
960	};	1156	};
961		1157
962	defined wantarray && AnyEvent::Util::guard { %state = () }	1158	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
963	}	1159	}
964		1160
965	sub http_get($@) {	1161	sub http_get($@) {
966	unshift @_, "GET";	1162	unshift @_, "GET";
967	&http_request	1163	&http_request
…		…
985	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1181	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
986	the actual connection, which in turn uses AnyEvent::DNS to resolve	1182	the actual connection, which in turn uses AnyEvent::DNS to resolve
987	hostnames. The latter is a simple stub resolver and does no caching	1183	hostnames. The latter is a simple stub resolver and does no caching
988	on its own. If you want DNS caching, you currently have to provide	1184	on its own. If you want DNS caching, you currently have to provide
989	your own default resolver (by storing a suitable resolver object in	1185	your own default resolver (by storing a suitable resolver object in
990	C<$AnyEvent::DNS::RESOLVER>).	1186	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
991		1187
992	=head2 GLOBAL FUNCTIONS AND VARIABLES	1188	=head2 GLOBAL FUNCTIONS AND VARIABLES
993		1189
994	=over 4	1190	=over 4
995		1191
996	=item AnyEvent::HTTP::set_proxy "proxy-url"	1192	=item AnyEvent::HTTP::set_proxy "proxy-url"
997		1193
998	Sets the default proxy server to use. The proxy-url must begin with a	1194	Sets the default proxy server to use. The proxy-url must begin with a
999	string of the form C<http://host:port> (optionally C<https:...>), croaks	1195	string of the form C<http://host:port>, croaks otherwise.
1000	otherwise.
1001		1196
1002	To clear an already-set proxy, use C<undef>.	1197	To clear an already-set proxy, use C<undef>.
		1198
		1199	When AnyEvent::HTTP is laoded for the first time it will query the
		1200	default proxy from the operating system, currently by looking at
		1201	C<$ENV{http_proxy>}.
1003		1202
1004	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]	1203	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
1005		1204
1006	Remove all cookies from the cookie jar that have been expired. If	1205	Remove all cookies from the cookie jar that have been expired. If
1007	C<$session_end> is given and true, then additionally remove all session	1206	C<$session_end> is given and true, then additionally remove all session
…		…
1053		1252
1054	=item $AnyEvent::HTTP::MAX_RECURSE	1253	=item $AnyEvent::HTTP::MAX_RECURSE
1055		1254
1056	The default value for the C<recurse> request parameter (default: C<10>).	1255	The default value for the C<recurse> request parameter (default: C<10>).
1057		1256
		1257	=item $AnyEvent::HTTP::TIMEOUT
		1258
		1259	The default timeout for connection operations (default: C<300>).
		1260
1058	=item $AnyEvent::HTTP::USERAGENT	1261	=item $AnyEvent::HTTP::USERAGENT
1059		1262
1060	The default value for the C<User-Agent> header (the default is	1263	The default value for the C<User-Agent> header (the default is
1061	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1264	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
1062		1265
1063	=item $AnyEvent::HTTP::MAX_PER_HOST	1266	=item $AnyEvent::HTTP::MAX_PER_HOST
1064		1267
1065	The maximum number of concurrent connections to the same host (identified	1268	The maximum number of concurrent connections to the same host (identified
1066	by the hostname). If the limit is exceeded, then the additional requests	1269	by the hostname). If the limit is exceeded, then the additional requests
1067	are queued until previous connections are closed.	1270	are queued until previous connections are closed. Both persistent and
		1271	non-persistent connections are counted in this limit.
1068		1272
1069	The default value for this is C<4>, and it is highly advisable to not	1273	The default value for this is C<4>, and it is highly advisable to not
1070	increase it.	1274	increase it much.
		1275
		1276	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1277	connections, older browsers used 2, newers (such as firefox 3) typically
		1278	use 6, and Opera uses 8 because like, they have the fastest browser and
		1279	give a shit for everybody else on the planet.
		1280
		1281	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1282
		1283	The time after which idle persistent conenctions get closed by
		1284	AnyEvent::HTTP (default: C<3>).
1071		1285
1072	=item $AnyEvent::HTTP::ACTIVE	1286	=item $AnyEvent::HTTP::ACTIVE
1073		1287
1074	The number of active connections. This is not the number of currently	1288	The number of active connections. This is not the number of currently
1075	running requests, but the number of currently open and non-idle TCP	1289	running requests, but the number of currently open and non-idle TCP
1076	connections. This number of can be useful for load-leveling.	1290	connections. This number can be useful for load-leveling.
1077		1291
1078	=back	1292	=back
1079		1293
1080	=cut	1294	=cut
1081		1295
…		…
1115	# other formats fail in the loop below	1329	# other formats fail in the loop below
1116		1330
1117	for (0..11) {	1331	for (0..11) {
1118	if ($m eq $month[$_]) {	1332	if ($m eq $month[$_]) {
1119	require Time::Local;	1333	require Time::Local;
1120	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1334	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
1121	}	1335	}
1122	}	1336	}
1123		1337
1124	undef	1338	undef
1125	}	1339	}
1126		1340
1127	sub set_proxy($) {	1341	sub set_proxy($) {
1128	if (length $_[0]) {	1342	if (length $_[0]) {
1129	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1343	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1130	or Carp::croak "$_[0]: invalid proxy URL";	1344	or Carp::croak "$_[0]: invalid proxy URL";
1131	$PROXY = [$2, $3 \|\| 3128, $1]	1345	$PROXY = [$2, $3 \|\| 3128, $1]
1132	} else {	1346	} else {
1133	undef $PROXY;	1347	undef $PROXY;
1134	}	1348	}
…		…
1137	# initialise proxy from environment	1351	# initialise proxy from environment
1138	eval {	1352	eval {
1139	set_proxy $ENV{http_proxy};	1353	set_proxy $ENV{http_proxy};
1140	};	1354	};
1141		1355
		1356	=head2 SHOWCASE
		1357
		1358	This section contaisn some more elaborate "real-world" examples or code
		1359	snippets.
		1360
		1361	=head2 HTTP/1.1 FILE DOWNLOAD
		1362
		1363	Downloading files with HTTP can be quite tricky, especially when something
		1364	goes wrong and you want to resume.
		1365
		1366	Here is a function that initiates and resumes a download. It uses the
		1367	last modified time to check for file content changes, and works with many
		1368	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1369	on older servers.
		1370
		1371	It calls the completion callback with either C<undef>, which means a
		1372	nonretryable error occured, C<0> when the download was partial and should
		1373	be retried, and C<1> if it was successful.
		1374
		1375	use AnyEvent::HTTP;
		1376
		1377	sub download($$$) {
		1378	my ($url, $file, $cb) = @_;
		1379
		1380	open my $fh, "+<", $file
		1381	or die "$file: $!";
		1382
		1383	my %hdr;
		1384	my $ofs = 0;
		1385
		1386	warn stat $fh;
		1387	warn -s _;
		1388	if (stat $fh and -s _) {
		1389	$ofs = -s _;
		1390	warn "-s is ", $ofs;
		1391	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1392	$hdr{"range"} = "bytes=$ofs-";
		1393	}
		1394
		1395	http_get $url,
		1396	headers => \%hdr,
		1397	on_header => sub {
		1398	my ($hdr) = @_;
		1399
		1400	if ($hdr->{Status} == 200 && $ofs) {
		1401	# resume failed
		1402	truncate $fh, $ofs = 0;
		1403	}
		1404
		1405	sysseek $fh, $ofs, 0;
		1406
		1407	1
		1408	},
		1409	on_body => sub {
		1410	my ($data, $hdr) = @_;
		1411
		1412	if ($hdr->{Status} =~ /^2/) {
		1413	length $data == syswrite $fh, $data
		1414	or return; # abort on write errors
		1415	}
		1416
		1417	1
		1418	},
		1419	sub {
		1420	my (undef, $hdr) = @_;
		1421
		1422	my $status = $hdr->{Status};
		1423
		1424	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1425	utime $fh, $time, $time;
		1426	}
		1427
		1428	if ($status == 200 \|\| $status == 206 \|\| $status == 416) {
		1429	# download ok \|\| resume ok \|\| file already fully downloaded
		1430	$cb->(1, $hdr);
		1431
		1432	} elsif ($status == 412) {
		1433	# file has changed while resuming, delete and retry
		1434	unlink $file;
		1435	$cb->(0, $hdr);
		1436
		1437	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1438	# retry later
		1439	$cb->(0, $hdr);
		1440
		1441	} else {
		1442	$cb->(undef, $hdr);
		1443	}
		1444	}
		1445	;
		1446	}
		1447
		1448	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1449	if ($_[0]) {
		1450	print "OK!\n";
		1451	} elsif (defined $_[0]) {
		1452	print "please retry later\n";
		1453	} else {
		1454	print "ERROR\n";
		1455	}
		1456	};
		1457
1142	=head2 SOCKS PROXIES	1458	=head3 SOCKS PROXIES
1143		1459
1144	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1460	Socks proxies are not directly supported by AnyEvent::HTTP. You can
1145	compile your perl to support socks, or use an external program such as	1461	compile your perl to support socks, or use an external program such as
1146	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy	1462	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
1147	transparently.	1463	transparently.

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.80 by root, Sat Jan 1 21:51:22 2011 UTC vs. Revision 1.112 by root, Wed Nov 14 22:22:24 2012 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.80 by root, Sat Jan 1 21:51:22 2011 UTC vs.
Revision 1.112 by root, Wed Nov 14 22:22:24 2012 UTC