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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 1.120 by root, Sun Jun 8 23:36:36 2014 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 = 2.21;
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
…		…
94	C<http_request> returns a "cancellation guard" - you have to keep the	89	C<http_request> returns a "cancellation guard" - you have to keep the
95	object at least alive until the callback get called. If the object gets	90	object at least alive until the callback get called. If the object gets
96	destroyed before the callback is called, the request will be cancelled.	91	destroyed before the callback is called, the request will be cancelled.
97		92
98	The callback will be called with the response body data as first argument	93	The callback will be called with the response body data as first argument
99	(or C<undef> if an error occured), and a hash-ref with response headers	94	(or C<undef> if an error occurred), and a hash-ref with response headers
100	(and trailers) as second argument.	95	(and trailers) as second argument.
101		96
102	All the headers in that hash are lowercased. In addition to the response	97	All the headers in that hash are lowercased. In addition to the response
103	headers, the "pseudo-headers" (uppercase to avoid clashing with possible	98	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
104	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the	99	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
…		…
128	C<590>-C<599> and the C<Reason> pseudo-header will contain an error	123	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
129	message. Currently the following status codes are used:	124	message. Currently the following status codes are used:
130		125
131	=over 4	126	=over 4
132		127
133	=item 595 - errors during connection etsbalishment, proxy handshake.	128	=item 595 - errors during connection establishment, proxy handshake.
134		129
135	=item 596 - errors during TLS negotiation, request sending and header processing.	130	=item 596 - errors during TLS negotiation, request sending and header processing.
136		131
137	=item 597 - errors during body receiving or processing.	132	=item 597 - errors during body receiving or processing.
138		133
…		…
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.
		161
		162	Only redirects to http and https URLs are supported. While most common
		163	redirection forms are handled entirely within this module, some require
		164	the use of the optional L<URI> module. If it is required but missing, then
		165	the request will fail with an error.
166		166
167	=item headers => hashref	167	=item headers => hashref
168		168
169	The request headers to use. Currently, C<http_request> may provide its own	169	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	170	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:>	171	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	172	(this can be suppressed by using C<undef> for these headers in which case
173	they won't be sent at all).	173	they won't be sent at all).
174		174
		175	You really should provide your own C<User-Agent:> header value that is
		176	appropriate for your program - I wouldn't be surprised if the default
		177	AnyEvent string gets blocked by webservers sooner or later.
		178
		179	Also, make sure that your headers names and values do not contain any
		180	embedded newlines.
		181
175	=item timeout => $seconds	182	=item timeout => $seconds
176		183
177	The time-out to use for various stages - each connect attempt will reset	184	The time-out to use for various stages - each connect attempt will reset
178	the timeout, as will read or write activity, i.e. this is not an overall	185	the timeout, as will read or write activity, i.e. this is not an overall
179	timeout.	186	timeout.
180		187
181	Default timeout is 5 minutes.	188	Default timeout is 5 minutes.
182		189
183	=item proxy => [$host, $port[, $scheme]] or undef	190	=item proxy => [$host, $port[, $scheme]] or undef
184		191
185	Use the given http proxy for all requests. If not specified, then the	192	Use the given http proxy for all requests, or no proxy if C<undef> is
186	default proxy (as specified by C<$ENV{http_proxy}>) is used.	193	used.
187		194
188	C<$scheme> must be either missing, C<http> for HTTP or C<https> for	195	C<$scheme> must be either missing or must be C<http> for HTTP.
189	HTTPS.	196
		197	If not specified, then the default proxy is used (see
		198	C<AnyEvent::HTTP::set_proxy>).
190		199
191	=item body => $string	200	=item body => $string
192		201
193	The request body, usually empty. Will be sent as-is (future versions of	202	The request body, usually empty. Will be sent as-is (future versions of
194	this module might offer more options).	203	this module might offer more options).
…		…
225	verification) TLS context.	234	verification) TLS context.
226		235
227	The default for this option is C<low>, which could be interpreted as "give	236	The default for this option is C<low>, which could be interpreted as "give
228	me the page, no matter what".	237	me the page, no matter what".
229		238
		239	See also the C<sessionid> parameter.
		240
		241	=item session => $string
		242
		243	The module might reuse connections to the same host internally. Sometimes
		244	(e.g. when using TLS), you do not want to reuse connections from other
		245	sessions. This can be achieved by setting this parameter to some unique
		246	ID (such as the address of an object storing your state data, or the TLS
		247	context) - only connections using the same unique ID will be reused.
		248
230	=item on_prepare => $callback->($fh)	249	=item on_prepare => $callback->($fh)
231		250
232	In rare cases you need to "tune" the socket before it is used to	251	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	252	connect (for example, to bind it on a given IP address). This parameter
234	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	253	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
235	and behaves exactly the same way (e.g. it has to provide a	254	and behaves exactly the same way (e.g. it has to provide a
236	timeout). See the description for the C<$prepare_cb> argument of	255	timeout). See the description for the C<$prepare_cb> argument of
237	C<AnyEvent::Socket::tcp_connect> for details.	256	C<AnyEvent::Socket::tcp_connect> for details.
238		257
…		…
303	called. Instead of the C<$body> argument containing the body data, the	322	called. Instead of the C<$body> argument containing the body data, the
304	callback will receive the L<AnyEvent::Handle> object associated with the	323	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	324	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.	325	(e.g. status C<304>), the empty string will be passed.
307		326
308	The handle object might or might not be in TLS mode, might be connected to	327	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	328	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	329	etc., and configured in unspecified ways. The user is responsible for this
311	module anymore).	330	handle (it will not be used by this module anymore).
312		331
313	This is useful with some push-type services, where, after the initial	332	This is useful with some push-type services, where, after the initial
314	headers, an interactive protocol is used (typical example would be the	333	headers, an interactive protocol is used (typical example would be the
315	push-style twitter API which starts a JSON/XML stream).	334	push-style twitter API which starts a JSON/XML stream).
316		335
317	If you think you need this, first have a look at C<on_body>, to see if	336	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.	337	that doesn't solve your problem in a better way.
		338
		339	=item persistent => $boolean
		340
		341	Try to create/reuse a persistent connection. When this flag is set
		342	(default: true for idempotent requests, false for all others), then
		343	C<http_request> tries to re-use an existing (previously-created)
		344	persistent connection to the host and, failing that, tries to create a new
		345	one.
		346
		347	Requests failing in certain ways will be automatically retried once, which
		348	is dangerous for non-idempotent requests, which is why it defaults to off
		349	for them. The reason for this is because the bozos who designed HTTP/1.1
		350	made it impossible to distinguish between a fatal error and a normal
		351	connection timeout, so you never know whether there was a problem with
		352	your request or not.
		353
		354	When reusing an existent connection, many parameters (such as TLS context)
		355	will be ignored. See the C<session> parameter for a workaround.
		356
		357	=item keepalive => $boolean
		358
		359	Only used when C<persistent> is also true. This parameter decides whether
		360	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		361	(as opposed to only a HTTP/1.1 persistent connection).
		362
		363	The default is true, except when using a proxy, in which case it defaults
		364	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		365
		366	=item handle_params => { key => value ... }
		367
		368	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		369	constructor that is called - not all requests will create a handle, and
		370	sometimes more than one is created, so this parameter is only good for
		371	setting hints.
		372
		373	Example: set the maximum read size to 4096, to potentially conserve memory
		374	at the cost of speed.
		375
		376	handle_params => {
		377	max_read_size => 4096,
		378	},
319		379
320	=back	380	=back
321		381
322	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	382	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
323	the response body.	383	the response body.
…		…
329		389
330	Example: do a HTTP HEAD request on https://www.google.com/, use a	390	Example: do a HTTP HEAD request on https://www.google.com/, use a
331	timeout of 30 seconds.	391	timeout of 30 seconds.
332		392
333	http_request	393	http_request
334	GET => "https://www.google.com",	394	HEAD => "https://www.google.com",
		395	headers => { "user-agent" => "MySearchClient 1.0" },
335	timeout => 30,	396	timeout => 30,
336	sub {	397	sub {
337	my ($body, $hdr) = @_;	398	my ($body, $hdr) = @_;
338	use Data::Dumper;	399	use Data::Dumper;
339	print Dumper $hdr;	400	print Dumper $hdr;
…		…
349	};	410	};
350		411
351	undef $request;	412	undef $request;
352		413
353	=cut	414	=cut
		415
		416	#############################################################################
		417	# wait queue/slots
354		418
355	sub _slot_schedule;	419	sub _slot_schedule;
356	sub _slot_schedule($) {	420	sub _slot_schedule($) {
357	my $host = shift;	421	my $host = shift;
358		422
…		…
381		445
382	_slot_schedule $_[0];	446	_slot_schedule $_[0];
383	}	447	}
384		448
385	#############################################################################	449	#############################################################################
		450	# cookie handling
386		451
387	# expire cookies	452	# expire cookies
388	sub cookie_jar_expire($;$) {	453	sub cookie_jar_expire($;$) {
389	my ($jar, $session_end) = @_;	454	my ($jar, $session_end) = @_;
390		455
…		…
414	}	479	}
415	}	480	}
416		481
417	# extract cookies from jar	482	# extract cookies from jar
418	sub cookie_jar_extract($$$$) {	483	sub cookie_jar_extract($$$$) {
419	my ($jar, $uscheme, $uhost, $upath) = @_;	484	my ($jar, $scheme, $host, $path) = @_;
420		485
421	%$jar = () if $jar->{version} != 1;	486	%$jar = () if $jar->{version} != 1;
422		487
423	my @cookies;	488	my @cookies;
424		489
425	while (my ($chost, $paths) = each %$jar) {	490	while (my ($chost, $paths) = each %$jar) {
426	next unless ref $paths;	491	next unless ref $paths;
427		492
428	if ($chost =~ /^\./) {	493	if ($chost =~ /^\./) {
429	next unless $chost eq substr $uhost, -length $chost;	494	next unless $chost eq substr $host, -length $chost;
430	} elsif ($chost =~ /\./) {	495	} elsif ($chost =~ /\./) {
431	next unless $chost eq $uhost;	496	next unless $chost eq $host;
432	} else {	497	} else {
433	next;	498	next;
434	}	499	}
435		500
436	while (my ($cpath, $cookies) = each %$paths) {	501	while (my ($cpath, $cookies) = each %$paths) {
437	next unless $cpath eq substr $upath, 0, length $cpath;	502	next unless $cpath eq substr $path, 0, length $cpath;
438		503
439	while (my ($cookie, $kv) = each %$cookies) {	504	while (my ($cookie, $kv) = each %$cookies) {
440	next if $uscheme ne "https" && exists $kv->{secure};	505	next if $scheme ne "https" && exists $kv->{secure};
441		506
442	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {	507	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
443	delete $cookies->{$cookie};	508	delete $cookies->{$cookie};
444	next;	509	next;
445	}	510	}
…		…
459	\@cookies	524	\@cookies
460	}	525	}
461		526
462	# parse set_cookie header into jar	527	# parse set_cookie header into jar
463	sub cookie_jar_set_cookie($$$$) {	528	sub cookie_jar_set_cookie($$$$) {
464	my ($jar, $set_cookie, $uhost, $date) = @_;	529	my ($jar, $set_cookie, $host, $date) = @_;
465		530
466	my $anow = int AE::now;	531	my $anow = int AE::now;
467	my $snow; # server-now	532	my $snow; # server-now
468		533
469	for ($set_cookie) {	534	for ($set_cookie) {
…		…
475	while (	540	while (
476	m{	541	m{
477	\G\s*	542	\G\s*
478	(?:	543	(?:
479	expires \s*=\s* ([A-Z][a-z][a-z]+,\ [^,;]+)	544	expires \s*=\s* ([A-Z][a-z][a-z]+,\ [^,;]+)
480	| ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )	545	| ([^=;,[:space:]]+) (?: \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^;,[:space:]]*) ) )?
481	)	546	)
482	}gcxsi	547	}gcxsi
483	) {	548	) {
484	my $name = $2;	549	my $name = $2;
485	my $value = $4;	550	my $value = $4;
486		551
487	unless (defined $name) {	552	if (defined $1) {
488	# expires	553	# expires
489	$name = "expires";	554	$name = "expires";
490	$value = $1;	555	$value = $1;
491	} elsif (!defined $value) {	556	} elsif (defined $3) {
492	# quoted	557	# quoted
493	$value = $3;	558	$value = $3;
494	$value =~ s/\\(.)/$1/gs;	559	$value =~ s/\\(.)/$1/gs;
495	}	560	}
496		561
497	push @kv, lc $name, $value;	562	push @kv, @kv ? lc $name : $name, $value;
498		563
499	last unless /\G\s*;/gc;	564	last unless /\G\s*;/gc;
500	}	565	}
501		566
502	last unless @kv;	567	last unless @kv;
…		…
525		590
526	# this is not rfc-like and not netscape-like. go figure.	591	# this is not rfc-like and not netscape-like. go figure.
527	my $ndots = $cdom =~ y/.//;	592	my $ndots = $cdom =~ y/.//;
528	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	593	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
529	} else {	594	} else {
530	$cdom = $uhost;	595	$cdom = $host;
531	}	596	}
532		597
533	# store it	598	# store it
534	$jar->{version} = 1;	599	$jar->{version} = 1;
535	$jar->{$cdom}{$cpath}{$name} = \%kv;	600	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
536		601
537	redo if /\G\s*,/gc;	602	redo if /\G\s*,/gc;
538	}	603	}
539	}	604	}
540		605
		606	#############################################################################
		607	# keepalive/persistent connection cache
		608
		609	# fetch a connection from the keepalive cache
		610	sub ka_fetch($) {
		611	my $ka_key = shift;
		612
		613	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		614	delete $KA_CACHE{$ka_key}
		615	unless @{ $KA_CACHE{$ka_key} };
		616
		617	$hdl
		618	}
		619
		620	sub ka_store($$) {
		621	my ($ka_key, $hdl) = @_;
		622
		623	my $kaa = $KA_CACHE{$ka_key} ||= [];
		624
		625	my $destroy = sub {
		626	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		627
		628	$hdl->destroy;
		629
		630	@ka
		631	? $KA_CACHE{$ka_key} = \@ka
		632	: delete $KA_CACHE{$ka_key};
		633	};
		634
		635	# on error etc., destroy
		636	$hdl->on_error ($destroy);
		637	$hdl->on_eof ($destroy);
		638	$hdl->on_read ($destroy);
		639	$hdl->timeout ($PERSISTENT_TIMEOUT);
		640
		641	push @$kaa, $hdl;
		642	shift @$kaa while @$kaa > $MAX_PER_HOST;
		643	}
		644
		645	#############################################################################
		646	# utilities
		647
541	# continue to parse $_ for headers and place them into the arg	648	# continue to parse $_ for headers and place them into the arg
542	sub parse_hdr() {	649	sub _parse_hdr() {
543	my %hdr;	650	my %hdr;
544		651
545	# things seen, not parsed:	652	# things seen, not parsed:
546	# p3pP="NON CUR OTPi OUR NOR UNI"	653	# p3pP="NON CUR OTPi OUR NOR UNI"
547		654
…		…
561	for values %hdr;	668	for values %hdr;
562		669
563	\%hdr	670	\%hdr
564	}	671	}
565		672
		673	#############################################################################
		674	# http_get
		675
566	our $qr_nlnl = qr{(?<![^\012])\015?\012};	676	our $qr_nlnl = qr{(?<![^\012])\015?\012};
567		677
568	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	678	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
569	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	679	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		680
		681	# maybe it should just become a normal object :/
		682
		683	sub _destroy_state(\%) {
		684	my ($state) = @_;
		685
		686	$state->{handle}->destroy if $state->{handle};
		687	%$state = ();
		688	}
		689
		690	sub _error(\%$$) {
		691	my ($state, $cb, $hdr) = @_;
		692
		693	&_destroy_state ($state);
		694
		695	$cb->(undef, $hdr);
		696	()
		697	}
		698
		699	our %IDEMPOTENT = (
		700	DELETE => 1,
		701	GET => 1,
		702	HEAD => 1,
		703	OPTIONS => 1,
		704	PUT => 1,
		705	TRACE => 1,
		706
		707	ACL => 1,
		708	"BASELINE-CONTROL" => 1,
		709	BIND => 1,
		710	CHECKIN => 1,
		711	CHECKOUT => 1,
		712	COPY => 1,
		713	LABEL => 1,
		714	LINK => 1,
		715	MERGE => 1,
		716	MKACTIVITY => 1,
		717	MKCALENDAR => 1,
		718	MKCOL => 1,
		719	MKREDIRECTREF => 1,
		720	MKWORKSPACE => 1,
		721	MOVE => 1,
		722	ORDERPATCH => 1,
		723	PROPFIND => 1,
		724	PROPPATCH => 1,
		725	REBIND => 1,
		726	REPORT => 1,
		727	SEARCH => 1,
		728	UNBIND => 1,
		729	UNCHECKOUT => 1,
		730	UNLINK => 1,
		731	UNLOCK => 1,
		732	UPDATE => 1,
		733	UPDATEREDIRECTREF => 1,
		734	"VERSION-CONTROL" => 1,
		735	);
570		736
571	sub http_request($$@) {	737	sub http_request($$@) {
572	my $cb = pop;	738	my $cb = pop;
573	my ($method, $url, %arg) = @_;	739	my ($method, $url, %arg) = @_;
574		740
…		…
592	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	758	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
593		759
594	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	760	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
595	if $recurse < 0;	761	if $recurse < 0;
596		762
597	my $proxy = $arg{proxy} || $PROXY;	763	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
598	my $timeout = $arg{timeout} || $TIMEOUT;	764	my $timeout = $arg{timeout} || $TIMEOUT;
599		765
600	my ($uscheme, $uauthority, $upath, $query, $fragment) =	766	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
601	$url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;	767	$url =~ m|^([^:]+):(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?$|;
602		768
603	$uscheme = lc $uscheme;	769	$uscheme = lc $uscheme;
604		770
605	my $uport = $uscheme eq "http" ? 80	771	my $uport = $uscheme eq "http" ? 80
606	: $uscheme eq "https" ? 443	772	: $uscheme eq "https" ? 443
607	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });	773	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
608		774
609	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	775	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
610	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	776	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
611		777
612	my $uhost = $1;	778	my $uhost = lc $1;
613	$uport = $2 if defined $2;	779	$uport = $2 if defined $2;
614		780
615	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	781	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
616	unless exists $hdr{host};	782	unless exists $hdr{host};
617		783
…		…
636	$rscheme = "http" unless defined $rscheme;	802	$rscheme = "http" unless defined $rscheme;
637		803
638	# don't support https requests over https-proxy transport,	804	# don't support https requests over https-proxy transport,
639	# can't be done with tls as spec'ed, unless you double-encrypt.	805	# can't be done with tls as spec'ed, unless you double-encrypt.
640	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	806	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		807
		808	$rhost = lc $rhost;
		809	$rscheme = lc $rscheme;
641	} else {	810	} else {
642	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	811	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
643	}	812	}
644		813
645	# leave out fragment and query string, just a heuristic	814	# leave out fragment and query string, just a heuristic
…		…
647	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	816	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
648		817
649	$hdr{"content-length"} = length $arg{body}	818	$hdr{"content-length"} = length $arg{body}
650	if length $arg{body} || $method ne "GET";	819	if length $arg{body} || $method ne "GET";
651		820
652	$hdr{connection} = "close TE"; #1.1	821	my $idempotent = $IDEMPOTENT{$method};
		822
		823	# default value for keepalive is true iff the request is for an idempotent method
		824	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
		825	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
		826	my $was_persistent; # true if this is actually a recycled connection
		827
		828	# the key to use in the keepalive cache
		829	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		830
		831	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
653	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	832	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
654		833
655	my %state = (connect_guard => 1);	834	my %state = (connect_guard => 1);
		835
		836	my $ae_error = 595; # connecting
		837
		838	# handle actual, non-tunneled, request
		839	my $handle_actual_request = sub {
		840	$ae_error = 596; # request phase
		841
		842	my $hdl = $state{handle};
		843
		844	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
		845
		846	# send request
		847	$hdl->push_write (
		848	"$method $rpath HTTP/1.1\015\012"
		849	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		850	. "\015\012"
		851	. $arg{body}
		852	);
		853
		854	# return if error occurred during push_write()
		855	return unless %state;
		856
		857	# reduce memory usage, save a kitten, also re-use it for the response headers.
		858	%hdr = ();
		859
		860	# status line and headers
		861	$state{read_response} = sub {
		862	return unless %state;
		863
		864	for ("$_[1]") {
		865	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		866
		867	/^HTTP\/0*([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/gxci
		868	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
		869
		870	# 100 Continue handling
		871	# should not happen as we don't send expect: 100-continue,
		872	# but we handle it just in case.
		873	# since we send the request body regardless, if we get an error
		874	# we are out of-sync, which we currently do NOT handle correctly.
		875	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		876	if $2 eq 100;
		877
		878	push @pseudo,
		879	HTTPVersion => $1,
		880	Status => $2,
		881	Reason => $3,
		882	;
		883
		884	my $hdr = _parse_hdr
		885	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
		886
		887	%hdr = (%$hdr, @pseudo);
		888	}
		889
		890	# redirect handling
		891	# relative uri handling forced by microsoft and other shitheads.
		892	# we give our best and fall back to URI if available.
		893	if (exists $hdr{location}) {
		894	my $loc = $hdr{location};
		895
		896	if ($loc =~ m%^//%) { # //
		897	$loc = "$rscheme:$loc";
		898
		899	} elsif ($loc eq "") {
		900	$loc = $url;
		901
		902	} elsif ($loc !~ /^(?: $ | [^:\/?\#]+ : )/x) { # anything "simple"
		903	$loc =~ s/^\.\/+//;
		904
		905	if ($loc !~ m%^[.?#]%) {
		906	my $prefix = "$rscheme://$uhost:$uport";
		907
		908	unless ($loc =~ s/^\///) {
		909	$prefix .= $upath;
		910	$prefix =~ s/\/[^\/]*$//;
		911	}
		912
		913	$loc = "$prefix/$loc";
		914
		915	} elsif (eval { require URI }) { # uri
		916	$loc = URI->new_abs ($loc, $url)->as_string;
		917
		918	} else {
		919	return _error %state, $cb, { @pseudo, Status => 599, Reason => "Cannot parse Location (URI module missing)" };
		920	#$hdr{Status} = 599;
		921	#$hdr{Reason} = "Unparsable Redirect (URI module missing)";
		922	#$recurse = 0;
		923	}
		924	}
		925
		926	$hdr{location} = $loc;
		927	}
		928
		929	my $redirect;
		930
		931	if ($recurse) {
		932	my $status = $hdr{Status};
		933
		934	# industry standard is to redirect POST as GET for
		935	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		936	# also, the UA should ask the user for 301 and 307 and POST,
		937	# industry standard seems to be to simply follow.
		938	# we go with the industry standard. 308 is defined
		939	# by rfc7238
		940	if ($status == 301 or $status == 302 or $status == 303) {
		941	# HTTP/1.1 is unclear on how to mutate the method
		942	$method = "GET" unless $method eq "HEAD";
		943	$redirect = 1;
		944	} elsif ($status == 307 or $status == 308) {
		945	$redirect = 1;
		946	}
		947	}
		948
		949	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
		950	if ($state{handle}) {
		951	# handle keepalive
		952	if (
		953	$persistent
		954	&& $_[3]
		955	&& ($hdr{HTTPVersion} < 1.1
		956	? $hdr{connection} =~ /\bkeep-?alive\b/i
		957	: $hdr{connection} !~ /\bclose\b/i)
		958	) {
		959	ka_store $ka_key, delete $state{handle};
		960	} else {
		961	# no keepalive, destroy the handle
		962	$state{handle}->destroy;
		963	}
		964	}
		965
		966	%state = ();
		967
		968	if (defined $_[1]) {
		969	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		970	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		971	}
		972
		973	# set-cookie processing
		974	if ($arg{cookie_jar}) {
		975	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		976	}
		977
		978	if ($redirect && exists $hdr{location}) {
		979	# we ignore any errors, as it is very common to receive
		980	# Content-Length != 0 but no actual body
		981	# we also access %hdr, as $_[1] might be an erro
		982	$state{recurse} =
		983	http_request (
		984	$method => $hdr{location},
		985	%arg,
		986	recurse => $recurse - 1,
		987	Redirect => [$_[0], \%hdr],
		988	sub {
		989	%state = ();
		990	&$cb
		991	},
		992	);
		993	} else {
		994	$cb->($_[0], \%hdr);
		995	}
		996	};
		997
		998	$ae_error = 597; # body phase
		999
		1000	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		1001
		1002	my $len = $chunked ? undef : $hdr{"content-length"};
		1003
		1004	# body handling, many different code paths
		1005	# - no body expected
		1006	# - want_body_handle
		1007	# - te chunked
		1008	# - 2x length known (with or without on_body)
		1009	# - 2x length not known (with or without on_body)
		1010	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		1011	$finish->(undef, 598 => "Request cancelled by on_header");
		1012	} elsif (
		1013	$hdr{Status} =~ /^(?:1..|204|205|304)$/
		1014	or $method eq "HEAD"
		1015	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		1016	) {
		1017	# no body
		1018	$finish->("", undef, undef, 1);
		1019
		1020	} elsif (!$redirect && $arg{want_body_handle}) {
		1021	$_[0]->on_eof (undef);
		1022	$_[0]->on_error (undef);
		1023	$_[0]->on_read (undef);
		1024
		1025	$finish->(delete $state{handle});
		1026
		1027	} elsif ($chunked) {
		1028	my $cl = 0;
		1029	my $body = "";
		1030	my $on_body = $arg{on_body} || sub { $body .= shift; 1 };
		1031
		1032	$state{read_chunk} = sub {
		1033	$_[1] =~ /^([0-9a-fA-F]+)/
		1034	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1035
		1036	my $len = hex $1;
		1037
		1038	if ($len) {
		1039	$cl += $len;
		1040
		1041	$_[0]->push_read (chunk => $len, sub {
		1042	$on_body->($_[1], \%hdr)
		1043	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1044
		1045	$_[0]->push_read (line => sub {
		1046	length $_[1]
		1047	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1048	$_[0]->push_read (line => $state{read_chunk});
		1049	});
		1050	});
		1051	} else {
		1052	$hdr{"content-length"} ||= $cl;
		1053
		1054	$_[0]->push_read (line => $qr_nlnl, sub {
		1055	if (length $_[1]) {
		1056	for ("$_[1]") {
		1057	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		1058
		1059	my $hdr = _parse_hdr
		1060	or return $finish->(undef, $ae_error => "Garbled response trailers");
		1061
		1062	%hdr = (%hdr, %$hdr);
		1063	}
		1064	}
		1065
		1066	$finish->($body, undef, undef, 1);
		1067	});
		1068	}
		1069	};
		1070
		1071	$_[0]->push_read (line => $state{read_chunk});
		1072
		1073	} elsif ($arg{on_body}) {
		1074	if (defined $len) {
		1075	$_[0]->on_read (sub {
		1076	$len -= length $_[0]{rbuf};
		1077
		1078	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1079	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1080
		1081	$len > 0
		1082	or $finish->("", undef, undef, 1);
		1083	});
		1084	} else {
		1085	$_[0]->on_eof (sub {
		1086	$finish->("");
		1087	});
		1088	$_[0]->on_read (sub {
		1089	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1090	or $finish->(undef, 598 => "Request cancelled by on_body");
		1091	});
		1092	}
		1093	} else {
		1094	$_[0]->on_eof (undef);
		1095
		1096	if (defined $len) {
		1097	$_[0]->on_read (sub {
		1098	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1099	if $len <= length $_[0]{rbuf};
		1100	});
		1101	} else {
		1102	$_[0]->on_error (sub {
		1103	($! == Errno::EPIPE || !$!)
		1104	? $finish->(delete $_[0]{rbuf})
		1105	: $finish->(undef, $ae_error => $_[2]);
		1106	});
		1107	$_[0]->on_read (sub { });
		1108	}
		1109	}
		1110	};
		1111
		1112	# if keepalive is enabled, then the server closing the connection
		1113	# before a response can happen legally - we retry on idempotent methods.
		1114	if ($was_persistent && $idempotent) {
		1115	my $old_eof = $hdl->{on_eof};
		1116	$hdl->{on_eof} = sub {
		1117	_destroy_state %state;
		1118
		1119	%state = ();
		1120	$state{recurse} =
		1121	http_request (
		1122	$method => $url,
		1123	%arg,
		1124	recurse => $recurse - 1,
		1125	keepalive => 0,
		1126	sub {
		1127	%state = ();
		1128	&$cb
		1129	}
		1130	);
		1131	};
		1132	$hdl->on_read (sub {
		1133	return unless %state;
		1134
		1135	# as soon as we receive something, a connection close
		1136	# once more becomes a hard error
		1137	$hdl->{on_eof} = $old_eof;
		1138	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1139	});
		1140	} else {
		1141	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1142	}
		1143	};
		1144
		1145	my $prepare_handle = sub {
		1146	my ($hdl) = $state{handle};
		1147
		1148	$hdl->on_error (sub {
		1149	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1150	});
		1151	$hdl->on_eof (sub {
		1152	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1153	});
		1154	$hdl->timeout_reset;
		1155	$hdl->timeout ($timeout);
		1156	};
		1157
		1158	# connected to proxy (or origin server)
		1159	my $connect_cb = sub {
		1160	my $fh = shift
		1161	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1162
		1163	return unless delete $state{connect_guard};
		1164
		1165	# get handle
		1166	$state{handle} = new AnyEvent::Handle
		1167	%{ $arg{handle_params} },
		1168	fh => $fh,
		1169	peername => $uhost,
		1170	tls_ctx => $arg{tls_ctx},
		1171	;
		1172
		1173	$prepare_handle->();
		1174
		1175	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1176
		1177	# now handle proxy-CONNECT method
		1178	if ($proxy && $uscheme eq "https") {
		1179	# oh dear, we have to wrap it into a connect request
		1180
		1181	# maybe re-use $uauthority with patched port?
		1182	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");
		1183	$state{handle}->push_read (line => $qr_nlnl, sub {
		1184	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1185	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1186
		1187	if ($2 == 200) {
		1188	$rpath = $upath;
		1189	$handle_actual_request->();
		1190	} else {
		1191	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1192	}
		1193	});
		1194	} else {
		1195	$handle_actual_request->();
		1196	}
		1197	};
656		1198
657	_get_slot $uhost, sub {	1199	_get_slot $uhost, sub {
658	$state{slot_guard} = shift;	1200	$state{slot_guard} = shift;
659		1201
660	return unless $state{connect_guard};	1202	return unless $state{connect_guard};
661		1203
662	my $ae_error = 595; # connecting	1204	# try to use an existing keepalive connection, but only if we, ourselves, plan
		1205	# on a keepalive request (in theory, this should be a separate config option).
		1206	if ($persistent && $KA_CACHE{$ka_key}) {
		1207	$was_persistent = 1;
663		1208
664	my $connect_cb = sub {	1209	$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 (	1210	$state{handle}->destroyed
711	"$method $rpath HTTP/1.1\015\012"	1211	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)	1212	$prepare_handle->();
713	. "\015\012"	1213	$state{handle}->destroyed
714	. (delete $arg{body})	1214	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;	1215	$handle_actual_request->();
945	} else {	1216
946	%state = ();
947	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
948	}
949	});
950	} else {	1217	} else {
951	&$handle_actual_request;
952	}
953	};
954
955	my $tcp_connect = $arg{tcp_connect}	1218	my $tcp_connect = $arg{tcp_connect}
956	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1219	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
957		1220
958	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });	1221	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });
959		1222	}
960	};	1223	};
961		1224
962	defined wantarray && AnyEvent::Util::guard { %state = () }	1225	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
963	}	1226	}
964		1227
965	sub http_get($@) {	1228	sub http_get($@) {
966	unshift @_, "GET";	1229	unshift @_, "GET";
967	&http_request	1230	&http_request
…		…
985	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1248	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
986	the actual connection, which in turn uses AnyEvent::DNS to resolve	1249	the actual connection, which in turn uses AnyEvent::DNS to resolve
987	hostnames. The latter is a simple stub resolver and does no caching	1250	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	1251	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	1252	your own default resolver (by storing a suitable resolver object in
990	C<$AnyEvent::DNS::RESOLVER>).	1253	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
991		1254
992	=head2 GLOBAL FUNCTIONS AND VARIABLES	1255	=head2 GLOBAL FUNCTIONS AND VARIABLES
993		1256
994	=over 4	1257	=over 4
995		1258
996	=item AnyEvent::HTTP::set_proxy "proxy-url"	1259	=item AnyEvent::HTTP::set_proxy "proxy-url"
997		1260
998	Sets the default proxy server to use. The proxy-url must begin with a	1261	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	1262	string of the form C<http://host:port>, croaks otherwise.
1000	otherwise.
1001		1263
1002	To clear an already-set proxy, use C<undef>.	1264	To clear an already-set proxy, use C<undef>.
		1265
		1266	When AnyEvent::HTTP is loaded for the first time it will query the
		1267	default proxy from the operating system, currently by looking at
		1268	C<$ENV{http_proxy>}.
1003		1269
1004	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]	1270	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
1005		1271
1006	Remove all cookies from the cookie jar that have been expired. If	1272	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	1273	C<$session_end> is given and true, then additionally remove all session
1008	cookies.	1274	cookies.
1009		1275
1010	You should call this function (with a true C<$session_end>) before you	1276	You should call this function (with a true C<$session_end>) before you
1011	save cookies to disk, and you should call this function after loading them	1277	save cookies to disk, and you should call this function after loading them
1012	again. If you have a long-running program you can additonally call this	1278	again. If you have a long-running program you can additionally call this
1013	function from time to time.	1279	function from time to time.
1014		1280
1015	A cookie jar is initially an empty hash-reference that is managed by this	1281	A cookie jar is initially an empty hash-reference that is managed by this
1016	module. It's format is subject to change, but currently it is like this:	1282	module. It's format is subject to change, but currently it is like this:
1017		1283
1018	The key C<version> has to contain C<1>, otherwise the hash gets	1284	The key C<version> has to contain C<1>, otherwise the hash gets
1019	emptied. All other keys are hostnames or IP addresses pointing to	1285	emptied. All other keys are hostnames or IP addresses pointing to
1020	hash-references. The key for these inner hash references is the	1286	hash-references. The key for these inner hash references is the
1021	server path for which this cookie is meant, and the values are again	1287	server path for which this cookie is meant, and the values are again
1022	hash-references. The keys of those hash-references is the cookie name, and	1288	hash-references. Each key of those hash-references is a cookie name, and
1023	the value, you guessed it, is another hash-reference, this time with the	1289	the value, you guessed it, is another hash-reference, this time with the
1024	key-value pairs from the cookie, except for C<expires> and C<max-age>,	1290	key-value pairs from the cookie, except for C<expires> and C<max-age>,
1025	which have been replaced by a C<_expires> key that contains the cookie	1291	which have been replaced by a C<_expires> key that contains the cookie
1026	expiry timestamp.	1292	expiry timestamp. Session cookies are indicated by not having an
		1293	C<_expires> key.
1027		1294
1028	Here is an example of a cookie jar with a single cookie, so you have a	1295	Here is an example of a cookie jar with a single cookie, so you have a
1029	chance of understanding the above paragraph:	1296	chance of understanding the above paragraph:
1030		1297
1031	{	1298	{
…		…
1053		1320
1054	=item $AnyEvent::HTTP::MAX_RECURSE	1321	=item $AnyEvent::HTTP::MAX_RECURSE
1055		1322
1056	The default value for the C<recurse> request parameter (default: C<10>).	1323	The default value for the C<recurse> request parameter (default: C<10>).
1057		1324
		1325	=item $AnyEvent::HTTP::TIMEOUT
		1326
		1327	The default timeout for connection operations (default: C<300>).
		1328
1058	=item $AnyEvent::HTTP::USERAGENT	1329	=item $AnyEvent::HTTP::USERAGENT
1059		1330
1060	The default value for the C<User-Agent> header (the default is	1331	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)>).	1332	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
1062		1333
1063	=item $AnyEvent::HTTP::MAX_PER_HOST	1334	=item $AnyEvent::HTTP::MAX_PER_HOST
1064		1335
1065	The maximum number of concurrent connections to the same host (identified	1336	The maximum number of concurrent connections to the same host (identified
1066	by the hostname). If the limit is exceeded, then the additional requests	1337	by the hostname). If the limit is exceeded, then the additional requests
1067	are queued until previous connections are closed.	1338	are queued until previous connections are closed. Both persistent and
		1339	non-persistent connections are counted in this limit.
1068		1340
1069	The default value for this is C<4>, and it is highly advisable to not	1341	The default value for this is C<4>, and it is highly advisable to not
1070	increase it.	1342	increase it much.
		1343
		1344	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1345	connections, older browsers used 2, newer ones (such as firefox 3)
		1346	typically use 6, and Opera uses 8 because like, they have the fastest
		1347	browser and give a shit for everybody else on the planet.
		1348
		1349	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1350
		1351	The time after which idle persistent connections get closed by
		1352	AnyEvent::HTTP (default: C<3>).
1071		1353
1072	=item $AnyEvent::HTTP::ACTIVE	1354	=item $AnyEvent::HTTP::ACTIVE
1073		1355
1074	The number of active connections. This is not the number of currently	1356	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	1357	running requests, but the number of currently open and non-idle TCP
1076	connections. This number of can be useful for load-leveling.	1358	connections. This number can be useful for load-leveling.
1077		1359
1078	=back	1360	=back
1079		1361
1080	=cut	1362	=cut
1081		1363
…		…
1115	# other formats fail in the loop below	1397	# other formats fail in the loop below
1116		1398
1117	for (0..11) {	1399	for (0..11) {
1118	if ($m eq $month[$_]) {	1400	if ($m eq $month[$_]) {
1119	require Time::Local;	1401	require Time::Local;
1120	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1402	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
1121	}	1403	}
1122	}	1404	}
1123		1405
1124	undef	1406	undef
1125	}	1407	}
1126		1408
1127	sub set_proxy($) {	1409	sub set_proxy($) {
1128	if (length $_[0]) {	1410	if (length $_[0]) {
1129	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1411	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1130	or Carp::croak "$_[0]: invalid proxy URL";	1412	or Carp::croak "$_[0]: invalid proxy URL";
1131	$PROXY = [$2, $3 || 3128, $1]	1413	$PROXY = [$2, $3 || 3128, $1]
1132	} else {	1414	} else {
1133	undef $PROXY;	1415	undef $PROXY;
1134	}	1416	}
…		…
1137	# initialise proxy from environment	1419	# initialise proxy from environment
1138	eval {	1420	eval {
1139	set_proxy $ENV{http_proxy};	1421	set_proxy $ENV{http_proxy};
1140	};	1422	};
1141		1423
		1424	=head2 SHOWCASE
		1425
		1426	This section contains some more elaborate "real-world" examples or code
		1427	snippets.
		1428
		1429	=head2 HTTP/1.1 FILE DOWNLOAD
		1430
		1431	Downloading files with HTTP can be quite tricky, especially when something
		1432	goes wrong and you want to resume.
		1433
		1434	Here is a function that initiates and resumes a download. It uses the
		1435	last modified time to check for file content changes, and works with many
		1436	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1437	on older servers.
		1438
		1439	It calls the completion callback with either C<undef>, which means a
		1440	nonretryable error occurred, C<0> when the download was partial and should
		1441	be retried, and C<1> if it was successful.
		1442
		1443	use AnyEvent::HTTP;
		1444
		1445	sub download($$$) {
		1446	my ($url, $file, $cb) = @_;
		1447
		1448	open my $fh, "+<", $file
		1449	or die "$file: $!";
		1450
		1451	my %hdr;
		1452	my $ofs = 0;
		1453
		1454	warn stat $fh;
		1455	warn -s _;
		1456	if (stat $fh and -s _) {
		1457	$ofs = -s _;
		1458	warn "-s is ", $ofs;
		1459	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1460	$hdr{"range"} = "bytes=$ofs-";
		1461	}
		1462
		1463	http_get $url,
		1464	headers => \%hdr,
		1465	on_header => sub {
		1466	my ($hdr) = @_;
		1467
		1468	if ($hdr->{Status} == 200 && $ofs) {
		1469	# resume failed
		1470	truncate $fh, $ofs = 0;
		1471	}
		1472
		1473	sysseek $fh, $ofs, 0;
		1474
		1475	1
		1476	},
		1477	on_body => sub {
		1478	my ($data, $hdr) = @_;
		1479
		1480	if ($hdr->{Status} =~ /^2/) {
		1481	length $data == syswrite $fh, $data
		1482	or return; # abort on write errors
		1483	}
		1484
		1485	1
		1486	},
		1487	sub {
		1488	my (undef, $hdr) = @_;
		1489
		1490	my $status = $hdr->{Status};
		1491
		1492	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1493	utime $fh, $time, $time;
		1494	}
		1495
		1496	if ($status == 200 || $status == 206 || $status == 416) {
		1497	# download ok || resume ok || file already fully downloaded
		1498	$cb->(1, $hdr);
		1499
		1500	} elsif ($status == 412) {
		1501	# file has changed while resuming, delete and retry
		1502	unlink $file;
		1503	$cb->(0, $hdr);
		1504
		1505	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1506	# retry later
		1507	$cb->(0, $hdr);
		1508
		1509	} else {
		1510	$cb->(undef, $hdr);
		1511	}
		1512	}
		1513	;
		1514	}
		1515
		1516	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1517	if ($_[0]) {
		1518	print "OK!\n";
		1519	} elsif (defined $_[0]) {
		1520	print "please retry later\n";
		1521	} else {
		1522	print "ERROR\n";
		1523	}
		1524	};
		1525
1142	=head2 SOCKS PROXIES	1526	=head3 SOCKS PROXIES
1143		1527
1144	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1528	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	1529	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	1530	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
1147	transparently.	1531	transparently.

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