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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.71 by root, Fri Dec 31 20:50:58 2010 UTC vs.
Revision 1.121 by root, Tue Apr 7 01:18:20 2015 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, $headers)
73		68
74	Executes an HTTP-GET request. See the http_request function for details on	69	Executes an HTTP-GET request. See the http_request function for details on
…		…
94	C<http_request> returns a "cancellation guard" - you have to keep the	89	C<http_request> returns a "cancellation guard" - you have to keep the
95	object at least alive until the callback get called. If the object gets	90	object at least alive until the callback get called. If the object gets
96	destroyed before the callback is called, the request will be cancelled.	91	destroyed before the callback is called, the request will be cancelled.
97		92
98	The callback will be called with the response body data as first argument	93	The callback will be called with the response body data as first argument
99	(or C<undef> if an error occured), and a hash-ref with response headers	94	(or C<undef> if an error occurred), and a hash-ref with response headers
100	(and trailers) as second argument.	95	(and trailers) as second argument.
101		96
102	All the headers in that hash are lowercased. In addition to the response	97	All the headers in that hash are lowercased. In addition to the response
103	headers, the "pseudo-headers" (uppercase to avoid clashing with possible	98	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
104	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the	99	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
…		…
122		117
123	If the server sends a header multiple times, then their contents will be	118	If the server sends a header multiple times, then their contents will be
124	joined together with a comma (C<,>), as per the HTTP spec.	119	joined together with a comma (C<,>), as per the HTTP spec.
125		120
126	If an internal error occurs, such as not being able to resolve a hostname,	121	If an internal error occurs, such as not being able to resolve a hostname,
127	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>	122	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be
128	(usually C<599>) and the C<Reason> pseudo-header will contain an error	123	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
129	message.	124	message. Currently the following status codes are used:
		125
		126	=over 4
		127
		128	=item 595 - errors during connection establishment, proxy handshake.
		129
		130	=item 596 - errors during TLS negotiation, request sending and header processing.
		131
		132	=item 597 - errors during body receiving or processing.
		133
		134	=item 598 - user aborted request via C<on_header> or C<on_body>.
		135
		136	=item 599 - other, usually nonretryable, errors (garbled URL etc.).
		137
		138	=back
130		139
131	A typical callback might look like this:	140	A typical callback might look like this:
132		141
133	sub {	142	sub {
134	my ($body, $hdr) = @_;	143	my ($body, $hdr) = @_;
…		…
145		154
146	=over 4	155	=over 4
147		156
148	=item recurse => $count (default: $MAX_RECURSE)	157	=item recurse => $count (default: $MAX_RECURSE)
149		158
150	Whether to recurse requests or not, e.g. on redirects, authentication	159	Whether to recurse requests or not, e.g. on redirects, authentication and
151	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.
152		166
153	=item headers => hashref	167	=item headers => hashref
154		168
155	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
156	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
157	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:>
158	(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
159	they won't be sent at all).	173	they won't be sent at all).
160		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
161	=item timeout => $seconds	182	=item timeout => $seconds
162		183
163	The time-out to use for various stages - each connect attempt will reset	184	The time-out to use for various stages - each connect attempt will reset
164	the timeout, as will read or write activity, i.e. this is not an overall	185	the timeout, as will read or write activity, i.e. this is not an overall
165	timeout.	186	timeout.
166		187
167	Default timeout is 5 minutes.	188	Default timeout is 5 minutes.
168		189
169	=item proxy => [$host, $port[, $scheme]] or undef	190	=item proxy => [$host, $port[, $scheme]] or undef
170		191
171	Use the given http proxy for all requests. If not specified, then the	192	Use the given http proxy for all requests, or no proxy if C<undef> is
172	default proxy (as specified by C<$ENV{http_proxy}>) is used.	193	used.
173		194
174	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.
175	HTTPS.	196
		197	If not specified, then the default proxy is used (see
		198	C<AnyEvent::HTTP::set_proxy>).
176		199
177	=item body => $string	200	=item body => $string
178		201
179	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
180	this module might offer more options).	203	this module might offer more options).
…		…
182	=item cookie_jar => $hash_ref	205	=item cookie_jar => $hash_ref
183		206
184	Passing this parameter enables (simplified) cookie-processing, loosely	207	Passing this parameter enables (simplified) cookie-processing, loosely
185	based on the original netscape specification.	208	based on the original netscape specification.
186		209
187	The C<$hash_ref> must be an (initially empty) hash reference which will	210	The C<$hash_ref> must be an (initially empty) hash reference which
188	get updated automatically. It is possible to save the cookie jar to	211	will get updated automatically. It is possible to save the cookie jar
189	persistent storage with something like JSON or Storable, but this is not	212	to persistent storage with something like JSON or Storable - see the
190	recommended, as session-only cookies might survive longer than expected.	213	C<AnyEvent::HTTP::cookie_jar_expire> function if you wish to remove
		214	expired or session-only cookies, and also for documentation on the format
		215	of the cookie jar.
191		216
192	Note that this cookie implementation is not meant to be complete. If	217	Note that this cookie implementation is not meant to be complete. If
193	you want complete cookie management you have to do that on your	218	you want complete cookie management you have to do that on your
194	own. C<cookie_jar> is meant as a quick fix to get some cookie-using sites	219	own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites
195	working. Cookies are a privacy disaster, do not use them unless required	220	working. Cookies are a privacy disaster, do not use them unless required
196	to.	221	to.
197		222
198	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>	223	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
199	headers will be set and handled by this module, otherwise they will be	224	headers will be set and handled by this module, otherwise they will be
…		…
209	verification) TLS context.	234	verification) TLS context.
210		235
211	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
212	me the page, no matter what".	237	me the page, no matter what".
213		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
214	=item on_prepare => $callback->($fh)	249	=item on_prepare => $callback->($fh)
215		250
216	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
217	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
218	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	253	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
219	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
220	timeout). See the description for the C<$prepare_cb> argument of	255	timeout). See the description for the C<$prepare_cb> argument of
221	C<AnyEvent::Socket::tcp_connect> for details.	256	C<AnyEvent::Socket::tcp_connect> for details.
222		257
…		…
287	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
288	callback will receive the L<AnyEvent::Handle> object associated with the	323	callback will receive the L<AnyEvent::Handle> object associated with the
289	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
290	(e.g. status C<304>), the empty string will be passed.	325	(e.g. status C<304>), the empty string will be passed.
291		326
292	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
293	a proxy, be a persistent connection etc., and configured in unspecified	328	to a proxy, be a persistent connection, use chunked transfer encoding
294	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
295	module anymore).	330	handle (it will not be used by this module anymore).
296		331
297	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
298	headers, an interactive protocol is used (typical example would be the	333	headers, an interactive protocol is used (typical example would be the
299	push-style twitter API which starts a JSON/XML stream).	334	push-style twitter API which starts a JSON/XML stream).
300		335
301	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
302	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 => $boolean
		358
		359	Only used when C<persistent> is also true. This parameter decides whether
		360	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		361	(as opposed to only a HTTP/1.1 persistent connection).
		362
		363	The default is true, except when using a proxy, in which case it defaults
		364	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		365
		366	=item handle_params => { key => value ... }
		367
		368	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		369	constructor that is called - not all requests will create a handle, and
		370	sometimes more than one is created, so this parameter is only good for
		371	setting hints.
		372
		373	Example: set the maximum read size to 4096, to potentially conserve memory
		374	at the cost of speed.
		375
		376	handle_params => {
		377	max_read_size => 4096,
		378	},
303		379
304	=back	380	=back
305		381
306	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	382	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
307	the response body.	383	the response body.
…		…
313		389
314	Example: do a HTTP HEAD request on https://www.google.com/, use a	390	Example: do a HTTP HEAD request on https://www.google.com/, use a
315	timeout of 30 seconds.	391	timeout of 30 seconds.
316		392
317	http_request	393	http_request
318	GET => "https://www.google.com",	394	HEAD => "https://www.google.com",
		395	headers => { "user-agent" => "MySearchClient 1.0" },
319	timeout => 30,	396	timeout => 30,
320	sub {	397	sub {
321	my ($body, $hdr) = @_;	398	my ($body, $hdr) = @_;
322	use Data::Dumper;	399	use Data::Dumper;
323	print Dumper $hdr;	400	print Dumper $hdr;
…		…
333	};	410	};
334		411
335	undef $request;	412	undef $request;
336		413
337	=cut	414	=cut
		415
		416	#############################################################################
		417	# wait queue/slots
338		418
339	sub _slot_schedule;	419	sub _slot_schedule;
340	sub _slot_schedule($) {	420	sub _slot_schedule($) {
341	my $host = shift;	421	my $host = shift;
342		422
…		…
364	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	444	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
365		445
366	_slot_schedule $_[0];	446	_slot_schedule $_[0];
367	}	447	}
368		448
		449	#############################################################################
		450	# cookie handling
		451
		452	# expire cookies
369	sub cookie_jar_extract($$$$) {	453	sub cookie_jar_expire($;$) {
370	my ($jar, $uscheme, $uhost, $upath) = @_;	454	my ($jar, $session_end) = @_;
371		455
372	%$jar = () if $jar->{version} != 1;	456	%$jar = () if $jar->{version} != 1;
373		457
374	my @cookies;	458	my $anow = AE::now;
375		459
376	while (my ($chost, $paths) = each %$jar) {	460	while (my ($chost, $paths) = each %$jar) {
377	next unless ref $paths;	461	next unless ref $paths;
378		462
		463	while (my ($cpath, $cookies) = each %$paths) {
		464	while (my ($cookie, $kv) = each %$cookies) {
		465	if (exists $kv->{_expires}) {
		466	delete $cookies->{$cookie}
		467	if $anow > $kv->{_expires};
		468	} elsif ($session_end) {
		469	delete $cookies->{$cookie};
		470	}
		471	}
		472
		473	delete $paths->{$cpath}
		474	unless %$cookies;
		475	}
		476
		477	delete $jar->{$chost}
		478	unless %$paths;
		479	}
		480	}
		481
		482	# extract cookies from jar
		483	sub cookie_jar_extract($$$$) {
		484	my ($jar, $scheme, $host, $path) = @_;
		485
		486	%$jar = () if $jar->{version} != 1;
		487
		488	my @cookies;
		489
		490	while (my ($chost, $paths) = each %$jar) {
		491	next unless ref $paths;
		492
379	if ($chost =~ /^\./) {	493	if ($chost =~ /^\./) {
380	next unless $chost eq substr $uhost, -length $chost;	494	next unless $chost eq substr $host, -length $chost;
381	} elsif ($chost =~ /\./) {	495	} elsif ($chost =~ /\./) {
382	next unless $chost eq $uhost;	496	next unless $chost eq $host;
383	} else {	497	} else {
384	next;	498	next;
385	}	499	}
386		500
387	while (my ($cpath, $cookies) = each %$paths) {	501	while (my ($cpath, $cookies) = each %$paths) {
388	next unless $cpath eq substr $upath, 0, length $cpath;	502	next unless $cpath eq substr $path, 0, length $cpath;
389		503
390	while (my ($cookie, $kv) = each %$cookies) {	504	while (my ($cookie, $kv) = each %$cookies) {
391	next if $uscheme ne "https" && exists $kv->{secure};	505	next if $scheme ne "https" && exists $kv->{secure};
392		506
393	if (exists $kv->{expires}) {	507	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
394	if (AE::now > parse_date ($kv->{expires})) {
395	delete $cookies->{$cookie};	508	delete $cookies->{$cookie};
396	next;	509	next;
397	}
398	}	510	}
399		511
400	my $value = $kv->{value};	512	my $value = $kv->{value};
401		513
402	if ($value =~ /[=;,[:space:]]/) {	514	if ($value =~ /[=;,[:space:]]/) {
…		…
410	}	522	}
411		523
412	\@cookies	524	\@cookies
413	}	525	}
414		526
		527	# parse set_cookie header into jar
		528	sub cookie_jar_set_cookie($$$$) {
		529	my ($jar, $set_cookie, $host, $date) = @_;
		530
		531	my $anow = int AE::now;
		532	my $snow; # server-now
		533
		534	for ($set_cookie) {
		535	# parse NAME=VALUE
		536	my @kv;
		537
		538	# expires is not http-compliant in the original cookie-spec,
		539	# we support the official date format and some extensions
		540	while (
		541	m{
		542	\G\s*
		543	(?:
		544	expires \s*=\s* ([A-Z][a-z][a-z]+,\ [^,;]+)
		545	| ([^=;,[:space:]]+) (?: \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^;,[:space:]]*) ) )?
		546	)
		547	}gcxsi
		548	) {
		549	my $name = $2;
		550	my $value = $4;
		551
		552	if (defined $1) {
		553	# expires
		554	$name = "expires";
		555	$value = $1;
		556	} elsif (defined $3) {
		557	# quoted
		558	$value = $3;
		559	$value =~ s/\\(.)/$1/gs;
		560	}
		561
		562	push @kv, @kv ? lc $name : $name, $value;
		563
		564	last unless /\G\s*;/gc;
		565	}
		566
		567	last unless @kv;
		568
		569	my $name = shift @kv;
		570	my %kv = (value => shift @kv, @kv);
		571
		572	if (exists $kv{"max-age"}) {
		573	$kv{_expires} = $anow + delete $kv{"max-age"};
		574	} elsif (exists $kv{expires}) {
		575	$snow ||= parse_date ($date) || $anow;
		576	$kv{_expires} = $anow + (parse_date (delete $kv{expires}) - $snow);
		577	} else {
		578	delete $kv{_expires};
		579	}
		580
		581	my $cdom;
		582	my $cpath = (delete $kv{path}) || "/";
		583
		584	if (exists $kv{domain}) {
		585	$cdom = delete $kv{domain};
		586
		587	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		588
		589	next if $cdom =~ /\.$/;
		590
		591	# this is not rfc-like and not netscape-like. go figure.
		592	my $ndots = $cdom =~ y/.//;
		593	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		594	} else {
		595	$cdom = $host;
		596	}
		597
		598	# store it
		599	$jar->{version} = 1;
		600	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
		601
		602	redo if /\G\s*,/gc;
		603	}
		604	}
		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
415	# continue to parse $_ for headers and place them into the arg	648	# continue to parse $_ for headers and place them into the arg
416	sub parse_hdr() {	649	sub _parse_hdr() {
417	my %hdr;	650	my %hdr;
418		651
419	# things seen, not parsed:	652	# things seen, not parsed:
420	# p3pP="NON CUR OTPi OUR NOR UNI"	653	# p3pP="NON CUR OTPi OUR NOR UNI"
421		654
…		…
435	for values %hdr;	668	for values %hdr;
436		669
437	\%hdr	670	\%hdr
438	}	671	}
439		672
		673	#############################################################################
		674	# http_get
		675
440	our $qr_nlnl = qr{(?<![^\012])\015?\012};	676	our $qr_nlnl = qr{(?<![^\012])\015?\012};
441		677
442	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	678	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
443	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(\%$$) {
		691	my ($state, $cb, $hdr) = @_;
		692
		693	&_destroy_state ($state);
		694
		695	$cb->(undef, $hdr);
		696	()
		697	}
		698
		699	our %IDEMPOTENT = (
		700	DELETE => 1,
		701	GET => 1,
		702	HEAD => 1,
		703	OPTIONS => 1,
		704	PUT => 1,
		705	TRACE => 1,
		706
		707	ACL => 1,
		708	"BASELINE-CONTROL" => 1,
		709	BIND => 1,
		710	CHECKIN => 1,
		711	CHECKOUT => 1,
		712	COPY => 1,
		713	LABEL => 1,
		714	LINK => 1,
		715	MERGE => 1,
		716	MKACTIVITY => 1,
		717	MKCALENDAR => 1,
		718	MKCOL => 1,
		719	MKREDIRECTREF => 1,
		720	MKWORKSPACE => 1,
		721	MOVE => 1,
		722	ORDERPATCH => 1,
		723	PROPFIND => 1,
		724	PROPPATCH => 1,
		725	REBIND => 1,
		726	REPORT => 1,
		727	SEARCH => 1,
		728	UNBIND => 1,
		729	UNCHECKOUT => 1,
		730	UNLINK => 1,
		731	UNLOCK => 1,
		732	UPDATE => 1,
		733	UPDATEREDIRECTREF => 1,
		734	"VERSION-CONTROL" => 1,
		735	);
444		736
445	sub http_request($$@) {	737	sub http_request($$@) {
446	my $cb = pop;	738	my $cb = pop;
447	my ($method, $url, %arg) = @_;	739	my ($method, $url, %arg) = @_;
448		740
…		…
466	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	758	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
467		759
468	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	760	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
469	if $recurse < 0;	761	if $recurse < 0;
470		762
471	my $proxy = $arg{proxy} || $PROXY;	763	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
472	my $timeout = $arg{timeout} || $TIMEOUT;	764	my $timeout = $arg{timeout} || $TIMEOUT;
473		765
474	my ($uscheme, $uauthority, $upath, $query, $fragment) =	766	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
475	$url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;	767	$url =~ m|^([^:]+):(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?$|;
476		768
477	$uscheme = lc $uscheme;	769	$uscheme = lc $uscheme;
478		770
479	my $uport = $uscheme eq "http" ? 80	771	my $uport = $uscheme eq "http" ? 80
480	: $uscheme eq "https" ? 443	772	: $uscheme eq "https" ? 443
481	: 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" });
482		774
483	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	775	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
484	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	776	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
485		777
486	my $uhost = $1;	778	my $uhost = lc $1;
487	$uport = $2 if defined $2;	779	$uport = $2 if defined $2;
488		780
489	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	781	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
490	unless exists $hdr{host};	782	unless exists $hdr{host};
491		783
…		…
510	$rscheme = "http" unless defined $rscheme;	802	$rscheme = "http" unless defined $rscheme;
511		803
512	# don't support https requests over https-proxy transport,	804	# don't support https requests over https-proxy transport,
513	# 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.
514	$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;
515	} else {	810	} else {
516	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	811	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
517	}	812	}
518		813
519	# leave out fragment and query string, just a heuristic	814	# leave out fragment and query string, just a heuristic
…		…
521	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	816	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
522		817
523	$hdr{"content-length"} = length $arg{body}	818	$hdr{"content-length"} = length $arg{body}
524	if length $arg{body} || $method ne "GET";	819	if length $arg{body} || $method ne "GET";
525		820
526	$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
527	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	832	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
528		833
529	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 rfc7538
		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	};
530		1198
531	_get_slot $uhost, sub {	1199	_get_slot $uhost, sub {
532	$state{slot_guard} = shift;	1200	$state{slot_guard} = shift;
533		1201
534	return unless $state{connect_guard};	1202	return unless $state{connect_guard};
535		1203
536	my $connect_cb = sub {	1204	# try to use an existing keepalive connection, but only if we, ourselves, plan
537	$state{fh} = shift	1205	# on a keepalive request (in theory, this should be a separate config option).
538	or do {	1206	if ($persistent && $KA_CACHE{$ka_key}) {
539	my $err = "$!";	1207	$was_persistent = 1;
540	%state = ();
541	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
542	};
543		1208
544	pop; # free memory, save a tree	1209	$state{handle} = ka_fetch $ka_key;
545
546	return unless delete $state{connect_guard};
547
548	# get handle
549	$state{handle} = new AnyEvent::Handle
550	fh => $state{fh},
551	peername => $rhost,
552	tls_ctx => $arg{tls_ctx},
553	# these need to be reconfigured on keepalive handles
554	timeout => $timeout,
555	on_error => sub {
556	%state = ();
557	$cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
558	},
559	on_eof => sub {
560	%state = ();
561	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
562	},
563	;
564
565	# limit the number of persistent connections
566	# keepalive not yet supported
567	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
568	# ++$KA_COUNT{$_[1]};
569	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
570	# --$KA_COUNT{$_[1]}
571	# };
572	# $hdr{connection} = "keep-alive";
573	# }
574
575	$state{handle}->starttls ("connect") if $rscheme eq "https";
576
577	# handle actual, non-tunneled, request
578	my $handle_actual_request = sub {
579	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
580
581	# send request
582	$state{handle}->push_write (	1210	$state{handle}->destroyed
583	"$method $rpath HTTP/1.1\015\012"	1211	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
584	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)	1212	$prepare_handle->();
585	. "\015\012"	1213	$state{handle}->destroyed
586	. (delete $arg{body})	1214	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
587	);
588
589	# return if error occured during push_write()
590	return unless %state;
591
592	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
593
594	# status line and headers
595	$state{read_response} = sub {
596	for ("$_[1]") {
597	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
598
599	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc
600	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
601
602	# 100 Continue handling
603	# should not happen as we don't send expect: 100-continue,
604	# but we handle it just in case.
605	# since we send the request body regardless, if we get an error
606	# we are out of-sync, which we currently do NOT handle correctly.
607	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
608	if $2 eq 100;
609
610	push @pseudo,
611	HTTPVersion => $1,
612	Status => $2,
613	Reason => $3,
614	;
615
616	my $hdr = parse_hdr
617	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
618
619	%hdr = (%$hdr, @pseudo);
620	}
621
622	# redirect handling
623	# microsoft and other shitheads don't give a shit for following standards,
624	# try to support some common forms of broken Location headers.
625	if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
626	$hdr{location} =~ s/^\.\/+//;
627
628	my $url = "$rscheme://$uhost:$uport";
629
630	unless ($hdr{location} =~ s/^\///) {
631	$url .= $upath;
632	$url =~ s/\/[^\/]*$//;
633	}
634
635	$hdr{location} = "$url/$hdr{location}";
636	}
637
638	my $redirect;
639
640	if ($recurse) {
641	my $status = $hdr{Status};
642
643	# industry standard is to redirect POST as GET for
644	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
645	# also, the UA should ask the user for 301 and 307 and POST,
646	# industry standard seems to be to simply follow.
647	# we go with the industry standard.
648	if ($status == 301 or $status == 302 or $status == 303) {
649	# HTTP/1.1 is unclear on how to mutate the method
650	$method = "GET" unless $method eq "HEAD";
651	$redirect = 1;
652	} elsif ($status == 307) {
653	$redirect = 1;
654	}
655	}
656
657	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
658	my $keepalive = pop;
659
660	$state{handle}->destroy if $state{handle};
661	%state = ();
662
663	if (defined $_[1]) {
664	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
665	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
666	}
667
668	# set-cookie processing
669	if ($arg{cookie_jar}) {
670	for ($hdr{"set-cookie"}) {
671	# parse NAME=VALUE
672	my @kv;
673
674	while (
675	m{
676	\G\s*
677	(?:
678	expires \s*=\s* ([A-Z][a-z][a-z],\ [^,;]+)
679	| ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )
680	)
681	}gcxsi
682	) {
683	my $name = $2;
684	my $value = $4;
685
686	unless (defined $name) {
687	# expires
688	$name = "expires";
689	$value = $1;
690	} elsif (!defined $value) {
691	# quoted
692	$value = $3;
693	$value =~ s/\\(.)/$1/gs;
694	}
695
696	push @kv, lc $name, $value;
697
698	last unless /\G\s*;/gc;
699	}
700
701	last unless @kv;
702
703	my $name = shift @kv;
704	my %kv = (value => shift @kv, @kv);
705
706	$kv{expires} ||= format_date (AE::now + $kv{"max-age"})
707	if exists $kv{"max-age"};
708
709	my $cdom;
710	my $cpath = (delete $kv{path}) || "/";
711
712	if (exists $kv{domain}) {
713	$cdom = delete $kv{domain};
714
715	$cdom =~ s/^\.?/./; # make sure it starts with a "."
716
717	next if $cdom =~ /\.$/;
718
719	# this is not rfc-like and not netscape-like. go figure.
720	my $ndots = $cdom =~ y/.//;
721	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
722	} else {
723	$cdom = $uhost;
724	}
725
726	# store it
727	$arg{cookie_jar}{version} = 1;
728	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
729
730	redo if /\G\s*,/gc;
731	}
732	}
733
734	if ($redirect && exists $hdr{location}) {
735	# we ignore any errors, as it is very common to receive
736	# Content-Length != 0 but no actual body
737	# we also access %hdr, as $_[1] might be an erro
738	http_request (
739	$method => $hdr{location},
740	%arg,
741	recurse => $recurse - 1,
742	Redirect => [$_[0], \%hdr],
743	$cb);
744	} else {
745	$cb->($_[0], \%hdr);
746	}
747	};
748
749	my $len = $hdr{"content-length"};
750
751	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
752	$finish->(undef, 598 => "Request cancelled by on_header");
753	} elsif (
754	$hdr{Status} =~ /^(?:1..|204|205|304)$/
755	or $method eq "HEAD"
756	or (defined $len && !$len)
757	) {
758	# no body
759	$finish->("", undef, undef, 1);
760	} else {
761	# body handling, many different code paths
762	# - no body expected
763	# - want_body_handle
764	# - te chunked
765	# - 2x length known (with or without on_body)
766	# - 2x length not known (with or without on_body)
767	if (!$redirect && $arg{want_body_handle}) {
768	$_[0]->on_eof (undef);
769	$_[0]->on_error (undef);
770	$_[0]->on_read (undef);
771
772	$finish->(delete $state{handle});
773
774	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
775	my $cl = 0;
776	my $body = undef;
777	my $on_body = $arg{on_body} || sub { $body .= shift; 1 };
778
779	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
780
781	my $read_chunk; $read_chunk = sub {
782	$_[1] =~ /^([0-9a-fA-F]+)/
783	or $finish->(undef, 599 => "Garbled chunked transfer encoding");
784
785	my $len = hex $1;
786
787	if ($len) {
788	$cl += $len;
789
790	$_[0]->push_read (chunk => $len, sub {
791	$on_body->($_[1], \%hdr)
792	or return $finish->(undef, 598 => "Request cancelled by on_body");
793
794	$_[0]->push_read (line => sub {
795	length $_[1]
796	and return $finish->(undef, 599 => "Garbled chunked transfer encoding");
797	$_[0]->push_read (line => $read_chunk);
798	});
799	});
800	} else {
801	$hdr{"content-length"} ||= $cl;
802
803	$_[0]->push_read (line => $qr_nlnl, sub {
804	if (length $_[1]) {
805	for ("$_[1]") {
806	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
807
808	my $hdr = parse_hdr
809	or return $finish->(undef, 599 => "Garbled response trailers");
810
811	%hdr = (%hdr, %$hdr);
812	}
813	}
814
815	$finish->($body, undef, undef, 1);
816	});
817	}
818	};
819
820	$_[0]->push_read (line => $read_chunk);
821
822	} elsif ($arg{on_body}) {
823	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
824
825	if ($len) {
826	$_[0]->on_read (sub {
827	$len -= length $_[0]{rbuf};
828
829	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
830	or return $finish->(undef, 598 => "Request cancelled by on_body");
831
832	$len > 0
833	or $finish->("", undef, undef, 1);
834	});
835	} else {
836	$_[0]->on_eof (sub {
837	$finish->("");
838	});
839	$_[0]->on_read (sub {
840	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
841	or $finish->(undef, 598 => "Request cancelled by on_body");
842	});
843	}
844	} else {
845	$_[0]->on_eof (undef);
846
847	if ($len) {
848	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
849	$_[0]->on_read (sub {
850	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
851	if $len <= length $_[0]{rbuf};
852	});
853	} else {
854	$_[0]->on_error (sub {
855	($! == Errno::EPIPE || !$!)
856	? $finish->(delete $_[0]{rbuf})
857	: $finish->(undef, 599 => $_[2]);
858	});
859	$_[0]->on_read (sub { });
860	}
861	}
862	}
863	};
864
865	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
866	};
867
868	# now handle proxy-CONNECT method
869	if ($proxy && $uscheme eq "https") {
870	# oh dear, we have to wrap it into a connect request
871
872	# maybe re-use $uauthority with patched port?
873	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
874	$state{handle}->push_read (line => $qr_nlnl, sub {
875	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
876	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
877
878	if ($2 == 200) {
879	$rpath = $upath;
880	&$handle_actual_request;	1215	$handle_actual_request->();
881	} else {	1216
882	%state = ();
883	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
884	}
885	});
886	} else {	1217	} else {
887	&$handle_actual_request;
888	}
889	};
890
891	my $tcp_connect = $arg{tcp_connect}	1218	my $tcp_connect = $arg{tcp_connect}
892	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1219	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
893		1220
894	$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 });
895		1222	}
896	};	1223	};
897		1224
898	defined wantarray && AnyEvent::Util::guard { %state = () }	1225	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
899	}	1226	}
900		1227
901	sub http_get($@) {	1228	sub http_get($@) {
902	unshift @_, "GET";	1229	unshift @_, "GET";
903	&http_request	1230	&http_request
…		…
921	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1248	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
922	the actual connection, which in turn uses AnyEvent::DNS to resolve	1249	the actual connection, which in turn uses AnyEvent::DNS to resolve
923	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
924	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
925	your own default resolver (by storing a suitable resolver object in	1252	your own default resolver (by storing a suitable resolver object in
926	C<$AnyEvent::DNS::RESOLVER>).	1253	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
927		1254
928	=head2 GLOBAL FUNCTIONS AND VARIABLES	1255	=head2 GLOBAL FUNCTIONS AND VARIABLES
929		1256
930	=over 4	1257	=over 4
931		1258
932	=item AnyEvent::HTTP::set_proxy "proxy-url"	1259	=item AnyEvent::HTTP::set_proxy "proxy-url"
933		1260
934	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
935	string of the form C<http://host:port> (optionally C<https:...>), croaks	1262	string of the form C<http://host:port>, croaks otherwise.
936	otherwise.
937		1263
938	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>}.
		1269
		1270	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
		1271
		1272	Remove all cookies from the cookie jar that have been expired. If
		1273	C<$session_end> is given and true, then additionally remove all session
		1274	cookies.
		1275
		1276	You should call this function (with a true C<$session_end>) before you
		1277	save cookies to disk, and you should call this function after loading them
		1278	again. If you have a long-running program you can additionally call this
		1279	function from time to time.
		1280
		1281	A cookie jar is initially an empty hash-reference that is managed by this
		1282	module. Its format is subject to change, but currently it is as follows:
		1283
		1284	The key C<version> has to contain C<1>, otherwise the hash gets
		1285	emptied. All other keys are hostnames or IP addresses pointing to
		1286	hash-references. The key for these inner hash references is the
		1287	server path for which this cookie is meant, and the values are again
		1288	hash-references. Each key of those hash-references is a cookie name, and
		1289	the value, you guessed it, is another hash-reference, this time with the
		1290	key-value pairs from the cookie, except for C<expires> and C<max-age>,
		1291	which have been replaced by a C<_expires> key that contains the cookie
		1292	expiry timestamp. Session cookies are indicated by not having an
		1293	C<_expires> key.
		1294
		1295	Here is an example of a cookie jar with a single cookie, so you have a
		1296	chance of understanding the above paragraph:
		1297
		1298	{
		1299	version => 1,
		1300	"10.0.0.1" => {
		1301	"/" => {
		1302	"mythweb_id" => {
		1303	_expires => 1293917923,
		1304	value => "ooRung9dThee3ooyXooM1Ohm",
		1305	},
		1306	},
		1307	},
		1308	}
939		1309
940	=item $date = AnyEvent::HTTP::format_date $timestamp	1310	=item $date = AnyEvent::HTTP::format_date $timestamp
941		1311
942	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP	1312	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
943	Date (RFC 2616).	1313	Date (RFC 2616).
944		1314
945	=item $timestamp = AnyEvent::HTTP::parse_date $date	1315	=item $timestamp = AnyEvent::HTTP::parse_date $date
946		1316
947	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) and	1317	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
948	returns the corresponding POSIX timestamp, or C<undef> if the date cannot	1318	bunch of minor variations of those, and returns the corresponding POSIX
949	be parsed.	1319	timestamp, or C<undef> if the date cannot be parsed.
950		1320
951	=item $AnyEvent::HTTP::MAX_RECURSE	1321	=item $AnyEvent::HTTP::MAX_RECURSE
952		1322
953	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>).
		1324
		1325	=item $AnyEvent::HTTP::TIMEOUT
		1326
		1327	The default timeout for connection operations (default: C<300>).
954		1328
955	=item $AnyEvent::HTTP::USERAGENT	1329	=item $AnyEvent::HTTP::USERAGENT
956		1330
957	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
958	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)>).
959		1333
960	=item $AnyEvent::HTTP::MAX_PER_HOST	1334	=item $AnyEvent::HTTP::MAX_PER_HOST
961		1335
962	The maximum number of concurrent connections to the same host (identified	1336	The maximum number of concurrent connections to the same host (identified
963	by the hostname). If the limit is exceeded, then the additional requests	1337	by the hostname). If the limit is exceeded, then additional requests
964	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.
965		1340
966	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
967	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>).
968		1353
969	=item $AnyEvent::HTTP::ACTIVE	1354	=item $AnyEvent::HTTP::ACTIVE
970		1355
971	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
972	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
973	connections. This number of can be useful for load-leveling.	1358	connections. This number can be useful for load-leveling.
974		1359
975	=back	1360	=back
976		1361
977	=cut	1362	=cut
978		1363
…		…
993	sub parse_date($) {	1378	sub parse_date($) {
994	my ($date) = @_;	1379	my ($date) = @_;
995		1380
996	my ($d, $m, $y, $H, $M, $S);	1381	my ($d, $m, $y, $H, $M, $S);
997		1382
998	if ($date =~ /^[A-Z][a-z][a-z], ([0-9][0-9])[\- ]([A-Z][a-z][a-z])[\- ]([0-9][0-9][0-9][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) GMT$/) {	1383	if ($date =~ /^[A-Z][a-z][a-z]+, ([0-9][0-9]?)[\- ]([A-Z][a-z][a-z])[\- ]([0-9][0-9][0-9][0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) GMT$/) {
999	# RFC 822/1123, required by RFC 2616 (with " ")	1384	# RFC 822/1123, required by RFC 2616 (with " ")
1000	# cookie dates (with "-")	1385	# cookie dates (with "-")
1001		1386
1002	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);	1387	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
1003		1388
1004	} elsif ($date =~ /^[A-Z][a-z]+, ([0-9][0-9])-([A-Z][a-z][a-z])-([0-9][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) GMT$/) {	1389	} elsif ($date =~ /^[A-Z][a-z][a-z]+, ([0-9][0-9]?)-([A-Z][a-z][a-z])-([0-9][0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) GMT$/) {
1005	# RFC 850	1390	# RFC 850
1006	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);	1391	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
1007		1392
1008	} elsif ($date =~ /^[A-Z][a-z][a-z] ([A-Z][a-z][a-z]) ([0-9 ][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) ([0-9][0-9][0-9][0-9])$/) {	1393	} elsif ($date =~ /^[A-Z][a-z][a-z]+ ([A-Z][a-z][a-z]) ([0-9 ]?[0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) ([0-9][0-9][0-9][0-9])$/) {
1009	# ISO C's asctime	1394	# ISO C's asctime
1010	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);	1395	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
1011	}	1396	}
1012	# other formats fail in the loop below	1397	# other formats fail in the loop below
1013		1398
1014	for (0..11) {	1399	for (0..11) {
1015	if ($m eq $month[$_]) {	1400	if ($m eq $month[$_]) {
1016	require Time::Local;	1401	require Time::Local;
1017	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1402	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
1018	}	1403	}
1019	}	1404	}
1020		1405
1021	undef	1406	undef
1022	}	1407	}
1023		1408
1024	sub set_proxy($) {	1409	sub set_proxy($) {
1025	if (length $_[0]) {	1410	if (length $_[0]) {
1026	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1411	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1027	or Carp::croak "$_[0]: invalid proxy URL";	1412	or Carp::croak "$_[0]: invalid proxy URL";
1028	$PROXY = [$2, $3 || 3128, $1]	1413	$PROXY = [$2, $3 || 3128, $1]
1029	} else {	1414	} else {
1030	undef $PROXY;	1415	undef $PROXY;
1031	}	1416	}
…		…
1034	# initialise proxy from environment	1419	# initialise proxy from environment
1035	eval {	1420	eval {
1036	set_proxy $ENV{http_proxy};	1421	set_proxy $ENV{http_proxy};
1037	};	1422	};
1038		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
1039	=head2 SOCKS PROXIES	1526	=head3 SOCKS PROXIES
1040		1527
1041	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1528	Socks proxies are not directly supported by AnyEvent::HTTP. You can
1042	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
1043	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
1044	transparently.	1531	transparently.

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