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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.65 by root, Fri Dec 31 03:47:32 2010 UTC vs.
Revision 1.139 by root, Fri Aug 5 20:48:14 2022 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 = 2.25;
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 as	94	(or C<undef> if an error occurred), and a hash-ref with response headers
100	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
105	three parts of the HTTP Status-Line of the same name. If an error occurs	100	three parts of the HTTP Status-Line of the same name. If an error occurs
…		…
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	169	The request headers to use. Currently, C<http_request> may provide its own
156	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers	170	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
157	and will provide defaults for C<User-Agent:> and C<Referer:> (this can be	171	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>
158	suppressed by using C<undef> for these headers in which case they won't be	172	(this can be suppressed by using C<undef> for these headers in which case
159	sent at all).	173	they won't be sent at all).
		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.
160		181
161	=item timeout => $seconds	182	=item timeout => $seconds
162		183
163	The time-out to use for various stages - each connect attempt will reset	184	The time-out to use for various stages - each connect attempt will reset
164	the timeout, as will read or write activity, i.e. this is not an overall	185	the timeout, as will read or write activity, i.e. this is not an overall
…		…
166		187
167	Default timeout is 5 minutes.	188	Default timeout is 5 minutes.
168		189
169	=item proxy => [$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>).
		199
		200	Currently, if your proxy requires authorization, you have to specify an
		201	appropriate "Proxy-Authorization" header in every request.
		202
		203	Note that this module will prefer an existing persistent connection,
		204	even if that connection was made using another proxy. If you need to
		205	ensure that a new connection is made in this case, you can either force
		206	C<persistent> to false or e.g. use the proxy address in your C<sessionid>.
176		207
177	=item body => $string	208	=item body => $string
178		209
179	The request body, usually empty. Will be-sent as-is (future versions of	210	The request body, usually empty. Will be sent as-is (future versions of
180	this module might offer more options).	211	this module might offer more options).
181		212
182	=item cookie_jar => $hash_ref	213	=item cookie_jar => $hash_ref
183		214
184	Passing this parameter enables (simplified) cookie-processing, loosely	215	Passing this parameter enables (simplified) cookie-processing, loosely
185	based on the original netscape specification.	216	based on the original netscape specification.
186		217
187	The C<$hash_ref> must be an (initially empty) hash reference which will	218	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	219	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	220	to persistent storage with something like JSON or Storable - see the
190	recommended, as expiry times are currently being ignored.	221	C<AnyEvent::HTTP::cookie_jar_expire> function if you wish to remove
		222	expired or session-only cookies, and also for documentation on the format
		223	of the cookie jar.
191		224
192	Note that this cookie implementation is not of very high quality, nor	225	Note that this cookie implementation is not meant to be complete. If
193	meant to be complete. If you want complete cookie management you have to	226	you want complete cookie management you have to do that on your
194	do that on your own. C<cookie_jar> is meant as a quick fix to get some	227	own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites
195	cookie-using sites working. Cookies are a privacy disaster, do not use	228	working. Cookies are a privacy disaster, do not use them unless required
196	them unless required to.	229	to.
		230
		231	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
		232	headers will be set and handled by this module, otherwise they will be
		233	left untouched.
197		234
198	=item tls_ctx => $scheme | $tls_ctx	235	=item tls_ctx => $scheme | $tls_ctx
199		236
200	Specifies the AnyEvent::TLS context to be used for https connections. This	237	Specifies the AnyEvent::TLS context to be used for https connections. This
201	parameter follows the same rules as the C<tls_ctx> parameter to	238	parameter follows the same rules as the C<tls_ctx> parameter to
…		…
205	verification) TLS context.	242	verification) TLS context.
206		243
207	The default for this option is C<low>, which could be interpreted as "give	244	The default for this option is C<low>, which could be interpreted as "give
208	me the page, no matter what".	245	me the page, no matter what".
209		246
		247	See also the C<sessionid> parameter.
		248
		249	=item sessionid => $string
		250
		251	The module might reuse connections to the same host internally (regardless
		252	of other settings, such as C<tcp_connect> or C<proxy>). Sometimes (e.g.
		253	when using TLS or a specfic proxy), you do not want to reuse connections
		254	from other sessions. This can be achieved by setting this parameter to
		255	some unique ID (such as the address of an object storing your state data
		256	or the TLS context, or the proxy IP) - only connections using the same
		257	unique ID will be reused.
		258
210	=item on_prepare => $callback->($fh)	259	=item on_prepare => $callback->($fh)
211		260
212	In rare cases you need to "tune" the socket before it is used to	261	In rare cases you need to "tune" the socket before it is used to
213	connect (for exmaple, to bind it on a given IP address). This parameter	262	connect (for example, to bind it on a given IP address). This parameter
214	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	263	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
215	and behaves exactly the same way (e.g. it has to provide a	264	and behaves exactly the same way (e.g. it has to provide a
216	timeout). See the description for the C<$prepare_cb> argument of	265	timeout). See the description for the C<$prepare_cb> argument of
217	C<AnyEvent::Socket::tcp_connect> for details.	266	C<AnyEvent::Socket::tcp_connect> for details.
218		267
…		…
222	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>	271	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
223	to do this, but you can provide your own C<tcp_connect> function -	272	to do this, but you can provide your own C<tcp_connect> function -
224	obviously, it has to follow the same calling conventions, except that it	273	obviously, it has to follow the same calling conventions, except that it
225	may always return a connection guard object.	274	may always return a connection guard object.
226		275
		276	The connections made by this hook will be treated as equivalent to
		277	connections made the built-in way, specifically, they will be put into
		278	and taken from the persistent connection cache. If your C<$tcp_connect>
		279	function is incompatible with this kind of re-use, consider switching off
		280	C<persistent> connections and/or providing a C<sessionid> identifier.
		281
227	There are probably lots of weird uses for this function, starting from	282	There are probably lots of weird uses for this function, starting from
228	tracing the hosts C<http_request> actually tries to connect, to (inexact	283	tracing the hosts C<http_request> actually tries to connect, to (inexact
229	but fast) host => IP address caching or even socks protocol support.	284	but fast) host => IP address caching or even socks protocol support.
230		285
231	=item on_header => $callback->($headers)	286	=item on_header => $callback->($headers)
…		…
240		295
241	This callback is useful, among other things, to quickly reject unwanted	296	This callback is useful, among other things, to quickly reject unwanted
242	content, which, if it is supposed to be rare, can be faster than first	297	content, which, if it is supposed to be rare, can be faster than first
243	doing a C<HEAD> request.	298	doing a C<HEAD> request.
244		299
		300	The downside is that cancelling the request makes it impossible to re-use
		301	the connection. Also, the C<on_header> callback will not receive any
		302	trailer (headers sent after the response body).
		303
245	Example: cancel the request unless the content-type is "text/html".	304	Example: cancel the request unless the content-type is "text/html".
246		305
247	on_header => sub {	306	on_header => sub {
248	$_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/	307	$_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/
249	},	308	},
…		…
255	string instead of the body data.	314	string instead of the body data.
256		315
257	It has to return either true (in which case AnyEvent::HTTP will continue),	316	It has to return either true (in which case AnyEvent::HTTP will continue),
258	or false, in which case AnyEvent::HTTP will cancel the download (and call	317	or false, in which case AnyEvent::HTTP will cancel the download (and call
259	the completion callback with an error code of C<598>).	318	the completion callback with an error code of C<598>).
		319
		320	The downside to cancelling the request is that it makes it impossible to
		321	re-use the connection.
260		322
261	This callback is useful when the data is too large to be held in memory	323	This callback is useful when the data is too large to be held in memory
262	(so the callback writes it to a file) or when only some information should	324	(so the callback writes it to a file) or when only some information should
263	be extracted, or when the body should be processed incrementally.	325	be extracted, or when the body should be processed incrementally.
264		326
…		…
276	called. Instead of the C<$body> argument containing the body data, the	338	called. Instead of the C<$body> argument containing the body data, the
277	callback will receive the L<AnyEvent::Handle> object associated with the	339	callback will receive the L<AnyEvent::Handle> object associated with the
278	connection. In error cases, C<undef> will be passed. When there is no body	340	connection. In error cases, C<undef> will be passed. When there is no body
279	(e.g. status C<304>), the empty string will be passed.	341	(e.g. status C<304>), the empty string will be passed.
280		342
281	The handle object might or might not be in TLS mode, might be connected to	343	The handle object might or might not be in TLS mode, might be connected
282	a proxy, be a persistent connection etc., and configured in unspecified	344	to a proxy, be a persistent connection, use chunked transfer encoding
283	ways. The user is responsible for this handle (it will not be used by this	345	etc., and configured in unspecified ways. The user is responsible for this
284	module anymore).	346	handle (it will not be used by this module anymore).
285		347
286	This is useful with some push-type services, where, after the initial	348	This is useful with some push-type services, where, after the initial
287	headers, an interactive protocol is used (typical example would be the	349	headers, an interactive protocol is used (typical example would be the
288	push-style twitter API which starts a JSON/XML stream).	350	push-style twitter API which starts a JSON/XML stream).
289		351
290	If you think you need this, first have a look at C<on_body>, to see if	352	If you think you need this, first have a look at C<on_body>, to see if
291	that doesn't solve your problem in a better way.	353	that doesn't solve your problem in a better way.
292		354
		355	=item persistent => $boolean
		356
		357	Try to create/reuse a persistent connection. When this flag is set
		358	(default: true for idempotent requests, false for all others), then
		359	C<http_request> tries to re-use an existing (previously-created)
		360	persistent connection to same host (i.e. identical URL scheme, hostname,
		361	port and sessionid) and, failing that, tries to create a new one.
		362
		363	Requests failing in certain ways will be automatically retried once, which
		364	is dangerous for non-idempotent requests, which is why it defaults to off
		365	for them. The reason for this is because the bozos who designed HTTP/1.1
		366	made it impossible to distinguish between a fatal error and a normal
		367	connection timeout, so you never know whether there was a problem with
		368	your request or not.
		369
		370	When reusing an existent connection, many parameters (such as TLS context)
		371	will be ignored. See the C<sessionid> parameter for a workaround.
		372
		373	=item keepalive => $boolean
		374
		375	Only used when C<persistent> is also true. This parameter decides whether
		376	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		377	(as opposed to only a HTTP/1.1 persistent connection).
		378
		379	The default is true, except when using a proxy, in which case it defaults
		380	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		381
		382	=item handle_params => { key => value ... }
		383
		384	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		385	constructor that is called - not all requests will create a handle, and
		386	sometimes more than one is created, so this parameter is only good for
		387	setting hints.
		388
		389	Example: set the maximum read size to 4096, to potentially conserve memory
		390	at the cost of speed.
		391
		392	handle_params => {
		393	max_read_size => 4096,
		394	},
		395
293	=back	396	=back
294		397
295	Example: make a simple HTTP GET request for http://www.nethype.de/	398	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		399	the response body.
296		400
297	http_request GET => "http://www.nethype.de/", sub {	401	http_request GET => "http://www.nethype.de/", sub {
298	my ($body, $hdr) = @_;	402	my ($body, $hdr) = @_;
299	print "$body\n";	403	print "$body\n";
300	};	404	};
301		405
302	Example: make a HTTP HEAD request on https://www.google.com/, use a	406	Example: do a HTTP HEAD request on https://www.google.com/, use a
303	timeout of 30 seconds.	407	timeout of 30 seconds.
304		408
305	http_request	409	http_request
306	GET => "https://www.google.com",	410	HEAD => "https://www.google.com",
		411	headers => { "user-agent" => "MySearchClient 1.0" },
307	timeout => 30,	412	timeout => 30,
308	sub {	413	sub {
309	my ($body, $hdr) = @_;	414	my ($body, $hdr) = @_;
310	use Data::Dumper;	415	use Data::Dumper;
311	print Dumper $hdr;	416	print Dumper $hdr;
312	}	417	}
313	;	418	;
314		419
315	Example: make another simple HTTP GET request, but immediately try to	420	Example: do another simple HTTP GET request, but immediately try to
316	cancel it.	421	cancel it.
317		422
318	my $request = http_request GET => "http://www.nethype.de/", sub {	423	my $request = http_request GET => "http://www.nethype.de/", sub {
319	my ($body, $hdr) = @_;	424	my ($body, $hdr) = @_;
320	print "$body\n";	425	print "$body\n";
321	};	426	};
322		427
323	undef $request;	428	undef $request;
324		429
325	=cut	430	=cut
		431
		432	#############################################################################
		433	# wait queue/slots
326		434
327	sub _slot_schedule;	435	sub _slot_schedule;
328	sub _slot_schedule($) {	436	sub _slot_schedule($) {
329	my $host = shift;	437	my $host = shift;
330		438
…		…
352	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	460	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
353		461
354	_slot_schedule $_[0];	462	_slot_schedule $_[0];
355	}	463	}
356		464
		465	#############################################################################
		466	# cookie handling
		467
		468	# expire cookies
		469	sub cookie_jar_expire($;$) {
		470	my ($jar, $session_end) = @_;
		471
		472	%$jar = () if $jar->{version} != 2;
		473
		474	my $anow = AE::now;
		475
		476	while (my ($chost, $paths) = each %$jar) {
		477	next unless ref $paths;
		478
		479	while (my ($cpath, $cookies) = each %$paths) {
		480	while (my ($cookie, $kv) = each %$cookies) {
		481	if (exists $kv->{_expires}) {
		482	delete $cookies->{$cookie}
		483	if $anow > $kv->{_expires};
		484	} elsif ($session_end) {
		485	delete $cookies->{$cookie};
		486	}
		487	}
		488
		489	delete $paths->{$cpath}
		490	unless %$cookies;
		491	}
		492
		493	delete $jar->{$chost}
		494	unless %$paths;
		495	}
		496	}
		497
		498	# extract cookies from jar
		499	sub cookie_jar_extract($$$$) {
		500	my ($jar, $scheme, $host, $path) = @_;
		501
		502	%$jar = () if $jar->{version} != 2;
		503
		504	$host = AnyEvent::Util::idn_to_ascii $host
		505	if $host =~ /[^\x00-\x7f]/;
		506
		507	my @cookies;
		508
		509	while (my ($chost, $paths) = each %$jar) {
		510	next unless ref $paths;
		511
		512	# exact match or suffix including . match
		513	$chost eq $host or ".$chost" eq substr $host, -1 - length $chost
		514	or next;
		515
		516	while (my ($cpath, $cookies) = each %$paths) {
		517	next unless $cpath eq substr $path, 0, length $cpath;
		518
		519	while (my ($cookie, $kv) = each %$cookies) {
		520	next if $scheme ne "https" && exists $kv->{secure};
		521
		522	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
		523	delete $cookies->{$cookie};
		524	next;
		525	}
		526
		527	my $value = $kv->{value};
		528
		529	if ($value =~ /[=;,[:space:]]/) {
		530	$value =~ s/([\\"])/\\$1/g;
		531	$value = "\"$value\"";
		532	}
		533
		534	push @cookies, "$cookie=$value";
		535	}
		536	}
		537	}
		538
		539	\@cookies
		540	}
		541
		542	# parse set_cookie header into jar
		543	sub cookie_jar_set_cookie($$$$) {
		544	my ($jar, $set_cookie, $host, $date) = @_;
		545
		546	%$jar = () if $jar->{version} != 2;
		547
		548	my $anow = int AE::now;
		549	my $snow; # server-now
		550
		551	for ($set_cookie) {
		552	# parse NAME=VALUE
		553	my @kv;
		554
		555	# expires is not http-compliant in the original cookie-spec,
		556	# we support the official date format and some extensions
		557	while (
		558	m{
		559	\G\s*
		560	(?:
		561	expires \s*=\s* ([A-Z][a-z][a-z]+,\ [^,;]+)
		562	| ([^=;,[:space:]]+) (?: \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^;,[:space:]]*) ) )?
		563	)
		564	}gcxsi
		565	) {
		566	my $name = $2;
		567	my $value = $4;
		568
		569	if (defined $1) {
		570	# expires
		571	$name = "expires";
		572	$value = $1;
		573	} elsif (defined $3) {
		574	# quoted
		575	$value = $3;
		576	$value =~ s/\\(.)/$1/gs;
		577	}
		578
		579	push @kv, @kv ? lc $name : $name, $value;
		580
		581	last unless /\G\s*;/gc;
		582	}
		583
		584	last unless @kv;
		585
		586	my $name = shift @kv;
		587	my %kv = (value => shift @kv, @kv);
		588
		589	if (exists $kv{"max-age"}) {
		590	$kv{_expires} = $anow + delete $kv{"max-age"};
		591	} elsif (exists $kv{expires}) {
		592	$snow ||= parse_date ($date) || $anow;
		593	$kv{_expires} = $anow + (parse_date (delete $kv{expires}) - $snow);
		594	} else {
		595	delete $kv{_expires};
		596	}
		597
		598	my $cdom;
		599	my $cpath = (delete $kv{path}) || "/";
		600
		601	if (exists $kv{domain}) {
		602	$cdom = $kv{domain};
		603
		604	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		605
		606	next if $cdom =~ /\.$/;
		607
		608	# this is not rfc-like and not netscape-like. go figure.
		609	my $ndots = $cdom =~ y/.//;
		610	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		611
		612	$cdom = substr $cdom, 1; # remove initial .
		613	} else {
		614	$cdom = $host;
		615	}
		616
		617	# store it
		618	$jar->{version} = 2;
		619	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
		620
		621	redo if /\G\s*,/gc;
		622	}
		623	}
		624
		625	#############################################################################
		626	# keepalive/persistent connection cache
		627
		628	# fetch a connection from the keepalive cache
		629	sub ka_fetch($) {
		630	my $ka_key = shift;
		631
		632	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		633	delete $KA_CACHE{$ka_key}
		634	unless @{ $KA_CACHE{$ka_key} };
		635
		636	$hdl
		637	}
		638
		639	sub ka_store($$) {
		640	my ($ka_key, $hdl) = @_;
		641
		642	my $kaa = $KA_CACHE{$ka_key} ||= [];
		643
		644	my $destroy = sub {
		645	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		646
		647	$hdl->destroy;
		648
		649	@ka
		650	? $KA_CACHE{$ka_key} = \@ka
		651	: delete $KA_CACHE{$ka_key};
		652	};
		653
		654	# on error etc., destroy
		655	$hdl->on_error ($destroy);
		656	$hdl->on_eof ($destroy);
		657	$hdl->on_read ($destroy);
		658	$hdl->timeout ($PERSISTENT_TIMEOUT);
		659
		660	push @$kaa, $hdl;
		661	shift @$kaa while @$kaa > $MAX_PER_HOST;
		662	}
		663
		664	#############################################################################
		665	# utilities
		666
		667	# continue to parse $_ for headers and place them into the arg
		668	sub _parse_hdr() {
		669	my %hdr;
		670
		671	# things seen, not parsed:
		672	# p3pP="NON CUR OTPi OUR NOR UNI"
		673
		674	$hdr{lc $1} .= ",$2"
		675	while /\G
		676	([^:\000-\037]*):
		677	[\011\040]*
		678	((?: [^\012]+ | \012[\011\040] )*)
		679	\012
		680	/gxc;
		681
		682	/\G$/
		683	or return;
		684
		685	# remove the "," prefix we added to all headers above
		686	substr $_, 0, 1, ""
		687	for values %hdr;
		688
		689	\%hdr
		690	}
		691
		692	#############################################################################
		693	# http_get
		694
357	our $qr_nlnl = qr{(?<![^\012])\015?\012};	695	our $qr_nlnl = qr{(?<![^\012])\015?\012};
358		696
359	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	697	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
360	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	698	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		699
		700	# maybe it should just become a normal object :/
		701
		702	sub _destroy_state(\%) {
		703	my ($state) = @_;
		704
		705	$state->{handle}->destroy if $state->{handle};
		706	%$state = ();
		707	}
		708
		709	sub _error(\%$$) {
		710	my ($state, $cb, $hdr) = @_;
		711
		712	&_destroy_state ($state);
		713
		714	$cb->(undef, $hdr);
		715	()
		716	}
		717
		718	our %IDEMPOTENT = (
		719	DELETE => 1,
		720	GET => 1,
		721	QUERY => 1,
		722	HEAD => 1,
		723	OPTIONS => 1,
		724	PUT => 1,
		725	TRACE => 1,
		726
		727	ACL => 1,
		728	"BASELINE-CONTROL" => 1,
		729	BIND => 1,
		730	CHECKIN => 1,
		731	CHECKOUT => 1,
		732	COPY => 1,
		733	LABEL => 1,
		734	LINK => 1,
		735	MERGE => 1,
		736	MKACTIVITY => 1,
		737	MKCALENDAR => 1,
		738	MKCOL => 1,
		739	MKREDIRECTREF => 1,
		740	MKWORKSPACE => 1,
		741	MOVE => 1,
		742	ORDERPATCH => 1,
		743	PRI => 1,
		744	PROPFIND => 1,
		745	PROPPATCH => 1,
		746	REBIND => 1,
		747	REPORT => 1,
		748	SEARCH => 1,
		749	UNBIND => 1,
		750	UNCHECKOUT => 1,
		751	UNLINK => 1,
		752	UNLOCK => 1,
		753	UPDATE => 1,
		754	UPDATEREDIRECTREF => 1,
		755	"VERSION-CONTROL" => 1,
		756	);
361		757
362	sub http_request($$@) {	758	sub http_request($$@) {
363	my $cb = pop;	759	my $cb = pop;
364	my ($method, $url, %arg) = @_;	760	my ($method, $url, %arg) = @_;
365		761
…		…
383	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	779	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
384		780
385	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	781	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
386	if $recurse < 0;	782	if $recurse < 0;
387		783
388	my $proxy = $arg{proxy} || $PROXY;	784	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
389	my $timeout = $arg{timeout} || $TIMEOUT;	785	my $timeout = $arg{timeout} || $TIMEOUT;
390		786
391	my ($uscheme, $uauthority, $upath, $query, $fragment) =	787	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
392	$url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;	788	$url =~ m|^([^:]+):(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?$|;
393		789
394	$uscheme = lc $uscheme;	790	$uscheme = lc $uscheme;
395		791
396	my $uport = $uscheme eq "http" ? 80	792	my $uport = $uscheme eq "http" ? 80
397	: $uscheme eq "https" ? 443	793	: $uscheme eq "https" ? 443
398	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });	794	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
399		795
400	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	796	$uauthority =~ /^(?: .*\@ )? ([^\@]+?) (?: : (\d+) )?$/x
401	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	797	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
402		798
403	my $uhost = $1;	799	my $uhost = lc $1;
404	$uport = $2 if defined $2;	800	$uport = $2 if defined $2;
405		801
406	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	802	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
407	unless exists $hdr{host};	803	unless exists $hdr{host};
408		804
…		…
411		807
412	$upath =~ s%^/?%/%;	808	$upath =~ s%^/?%/%;
413		809
414	# cookie processing	810	# cookie processing
415	if (my $jar = $arg{cookie_jar}) {	811	if (my $jar = $arg{cookie_jar}) {
416	%$jar = () if $jar->{version} != 1;	812	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
417		813
418	my @cookie;
419
420	while (my ($chost, $v) = each %$jar) {
421	if ($chost =~ /^\./) {
422	next unless $chost eq substr $uhost, -length $chost;
423	} elsif ($chost =~ /\./) {
424	next unless $chost eq $uhost;
425	} else {
426	next;
427	}
428
429	while (my ($cpath, $v) = each %$v) {
430	next unless $cpath eq substr $upath, 0, length $cpath;
431
432	while (my ($k, $v) = each %$v) {
433	next if $uscheme ne "https" && exists $v->{secure};
434	my $value = $v->{value};
435	$value =~ s/([\\"])/\\$1/g;
436	push @cookie, "$k=\"$value\"";
437	}
438	}
439	}
440
441	$hdr{cookie} = join "; ", @cookie	814	$hdr{cookie} = join "; ", @$cookies
442	if @cookie;	815	if @$cookies;
443	}	816	}
444		817
445	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path	818	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
446		819
447	if ($proxy) {	820	if ($proxy) {
…		…
450	$rscheme = "http" unless defined $rscheme;	823	$rscheme = "http" unless defined $rscheme;
451		824
452	# don't support https requests over https-proxy transport,	825	# don't support https requests over https-proxy transport,
453	# can't be done with tls as spec'ed, unless you double-encrypt.	826	# can't be done with tls as spec'ed, unless you double-encrypt.
454	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	827	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		828
		829	$rhost = lc $rhost;
		830	$rscheme = lc $rscheme;
455	} else {	831	} else {
456	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	832	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
457	}	833	}
458		834
459	# leave out fragment and query string, just a heuristic	835	# leave out fragment and query string, just a heuristic
460	$hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};	836	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
461	$hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};	837	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
462		838
463	$hdr{"content-length"} = length $arg{body}	839	$hdr{"content-length"} = length $arg{body}
464	if length $arg{body} || $method ne "GET";	840	if length $arg{body} || $method ne "GET";
465		841
		842	my $idempotent = $IDEMPOTENT{$method};
		843
		844	# default value for keepalive is true iff the request is for an idempotent method
		845	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
		846	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
		847	my $was_persistent; # true if this is actually a recycled connection
		848
		849	# the key to use in the keepalive cache
		850	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		851
		852	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
		853	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
		854
466	my %state = (connect_guard => 1);	855	my %state = (connect_guard => 1);
		856
		857	my $ae_error = 595; # connecting
		858
		859	# handle actual, non-tunneled, request
		860	my $handle_actual_request = sub {
		861	$ae_error = 596; # request phase
		862
		863	my $hdl = $state{handle};
		864
		865	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
		866
		867	# send request
		868	$hdl->push_write (
		869	"$method $rpath HTTP/1.1\015\012"
		870	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		871	. "\015\012"
		872	. $arg{body}
		873	);
		874
		875	# return if error occurred during push_write()
		876	return unless %state;
		877
		878	# reduce memory usage, save a kitten, also re-use it for the response headers.
		879	%hdr = ();
		880
		881	# status line and headers
		882	$state{read_response} = sub {
		883	return unless %state;
		884
		885	for ("$_[1]") {
		886	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		887
		888	/^HTTP\/0*([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/gxci
		889	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
		890
		891	# 100 Continue handling
		892	# should not happen as we don't send expect: 100-continue,
		893	# but we handle it just in case.
		894	# since we send the request body regardless, if we get an error
		895	# we are out of-sync, which we currently do NOT handle correctly.
		896	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		897	if $2 eq 100;
		898
		899	push @pseudo,
		900	HTTPVersion => $1,
		901	Status => $2,
		902	Reason => $3,
		903	;
		904
		905	my $hdr = _parse_hdr
		906	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
		907
		908	%hdr = (%$hdr, @pseudo);
		909	}
		910
		911	# redirect handling
		912	# relative uri handling forced by microsoft and other shitheads.
		913	# we give our best and fall back to URI if available.
		914	if (exists $hdr{location}) {
		915	my $loc = $hdr{location};
		916
		917	if ($loc =~ m%^//%) { # //
		918	$loc = "$uscheme:$loc";
		919
		920	} elsif ($loc eq "") {
		921	$loc = $url;
		922
		923	} elsif ($loc !~ /^(?: $ | [^:\/?\#]+ : )/x) { # anything "simple"
		924	$loc =~ s/^\.\/+//;
		925
		926	if ($loc !~ m%^[.?#]%) {
		927	my $prefix = "$uscheme://$uauthority";
		928
		929	unless ($loc =~ s/^\///) {
		930	$prefix .= $upath;
		931	$prefix =~ s/\/[^\/]*$//;
		932	}
		933
		934	$loc = "$prefix/$loc";
		935
		936	} elsif (eval { require URI }) { # uri
		937	$loc = URI->new_abs ($loc, $url)->as_string;
		938
		939	} else {
		940	return _error %state, $cb, { @pseudo, Status => 599, Reason => "Cannot parse Location (URI module missing)" };
		941	#$hdr{Status} = 599;
		942	#$hdr{Reason} = "Unparsable Redirect (URI module missing)";
		943	#$recurse = 0;
		944	}
		945	}
		946
		947	$hdr{location} = $loc;
		948	}
		949
		950	my $redirect;
		951
		952	if ($recurse) {
		953	my $status = $hdr{Status};
		954
		955	# industry standard is to redirect POST as GET for
		956	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		957	# also, the UA should ask the user for 301 and 307 and POST,
		958	# industry standard seems to be to simply follow.
		959	# we go with the industry standard. 308 is defined
		960	# by rfc7538
		961	if ($status == 301 or $status == 302 or $status == 303) {
		962	$redirect = 1;
		963	# HTTP/1.1 is unclear on how to mutate the method
		964	unless ($method eq "HEAD") {
		965	$method = "GET";
		966	delete $arg{body};
		967	}
		968	} elsif ($status == 307 or $status == 308) {
		969	$redirect = 1;
		970	}
		971	}
		972
		973	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
		974	if ($state{handle}) {
		975	# handle keepalive
		976	if (
		977	$persistent
		978	&& $_[3]
		979	&& ($hdr{HTTPVersion} < 1.1
		980	? $hdr{connection} =~ /\bkeep-?alive\b/i
		981	: $hdr{connection} !~ /\bclose\b/i)
		982	) {
		983	ka_store $ka_key, delete $state{handle};
		984	} else {
		985	# no keepalive, destroy the handle
		986	$state{handle}->destroy;
		987	}
		988	}
		989
		990	%state = ();
		991
		992	if (defined $_[1]) {
		993	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		994	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		995	}
		996
		997	# set-cookie processing
		998	if ($arg{cookie_jar}) {
		999	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		1000	}
		1001
		1002	if ($redirect && exists $hdr{location}) {
		1003	# we ignore any errors, as it is very common to receive
		1004	# Content-Length != 0 but no actual body
		1005	# we also access %hdr, as $_[1] might be an erro
		1006	$state{recurse} =
		1007	http_request (
		1008	$method => $hdr{location},
		1009	%arg,
		1010	recurse => $recurse - 1,
		1011	Redirect => [$_[0], \%hdr],
		1012	sub {
		1013	%state = ();
		1014	&$cb
		1015	},
		1016	);
		1017	} else {
		1018	$cb->($_[0], \%hdr);
		1019	}
		1020	};
		1021
		1022	$ae_error = 597; # body phase
		1023
		1024	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		1025
		1026	my $len = $chunked ? undef : $hdr{"content-length"};
		1027
		1028	# body handling, many different code paths
		1029	# - no body expected
		1030	# - want_body_handle
		1031	# - te chunked
		1032	# - 2x length known (with or without on_body)
		1033	# - 2x length not known (with or without on_body)
		1034	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		1035	$finish->(undef, 598 => "Request cancelled by on_header");
		1036	} elsif (
		1037	$hdr{Status} =~ /^(?:1..|204|205|304)$/
		1038	or $method eq "HEAD"
		1039	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		1040	) {
		1041	# no body
		1042	$finish->("", undef, undef, 1);
		1043
		1044	} elsif (!$redirect && $arg{want_body_handle}) {
		1045	$_[0]->on_eof (undef);
		1046	$_[0]->on_error (undef);
		1047	$_[0]->on_read (undef);
		1048
		1049	$finish->(delete $state{handle});
		1050
		1051	} elsif ($chunked) {
		1052	my $cl = 0;
		1053	my $body = "";
		1054	my $on_body = (!$redirect && $arg{on_body}) || sub { $body .= shift; 1 };
		1055
		1056	$state{read_chunk} = sub {
		1057	$_[1] =~ /^([0-9a-fA-F]+)/
		1058	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1059
		1060	my $len = hex $1;
		1061
		1062	if ($len) {
		1063	$cl += $len;
		1064
		1065	$_[0]->push_read (chunk => $len, sub {
		1066	$on_body->($_[1], \%hdr)
		1067	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1068
		1069	$_[0]->push_read (line => sub {
		1070	length $_[1]
		1071	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1072	$_[0]->push_read (line => $state{read_chunk});
		1073	});
		1074	});
		1075	} else {
		1076	$hdr{"content-length"} ||= $cl;
		1077
		1078	$_[0]->push_read (line => $qr_nlnl, sub {
		1079	if (length $_[1]) {
		1080	for ("$_[1]") {
		1081	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		1082
		1083	my $hdr = _parse_hdr
		1084	or return $finish->(undef, $ae_error => "Garbled response trailers");
		1085
		1086	%hdr = (%hdr, %$hdr);
		1087	}
		1088	}
		1089
		1090	$finish->($body, undef, undef, 1);
		1091	});
		1092	}
		1093	};
		1094
		1095	$_[0]->push_read (line => $state{read_chunk});
		1096
		1097	} elsif (!$redirect && $arg{on_body}) {
		1098	if (defined $len) {
		1099	$_[0]->on_read (sub {
		1100	$len -= length $_[0]{rbuf};
		1101
		1102	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1103	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1104
		1105	$len > 0
		1106	or $finish->("", undef, undef, 1);
		1107	});
		1108	} else {
		1109	$_[0]->on_eof (sub {
		1110	$finish->("");
		1111	});
		1112	$_[0]->on_read (sub {
		1113	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1114	or $finish->(undef, 598 => "Request cancelled by on_body");
		1115	});
		1116	}
		1117	} else {
		1118	$_[0]->on_eof (undef);
		1119
		1120	if (defined $len) {
		1121	$_[0]->on_read (sub {
		1122	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1123	if $len <= length $_[0]{rbuf};
		1124	});
		1125	} else {
		1126	$_[0]->on_error (sub {
		1127	($! == Errno::EPIPE || !$!)
		1128	? $finish->(delete $_[0]{rbuf})
		1129	: $finish->(undef, $ae_error => $_[2]);
		1130	});
		1131	$_[0]->on_read (sub { });
		1132	}
		1133	}
		1134	};
		1135
		1136	# if keepalive is enabled, then the server closing the connection
		1137	# before a response can happen legally - we retry on idempotent methods.
		1138	if ($was_persistent && $idempotent) {
		1139	my $old_eof = $hdl->{on_eof};
		1140	$hdl->{on_eof} = sub {
		1141	_destroy_state %state;
		1142
		1143	%state = ();
		1144	$state{recurse} =
		1145	http_request (
		1146	$method => $url,
		1147	%arg,
		1148	recurse => $recurse - 1,
		1149	persistent => 0,
		1150	sub {
		1151	%state = ();
		1152	&$cb
		1153	}
		1154	);
		1155	};
		1156	$hdl->on_read (sub {
		1157	return unless %state;
		1158
		1159	# as soon as we receive something, a connection close
		1160	# once more becomes a hard error
		1161	$hdl->{on_eof} = $old_eof;
		1162	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1163	});
		1164	} else {
		1165	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1166	}
		1167	};
		1168
		1169	my $prepare_handle = sub {
		1170	my ($hdl) = $state{handle};
		1171
		1172	$hdl->on_error (sub {
		1173	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1174	});
		1175	$hdl->on_eof (sub {
		1176	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1177	});
		1178	$hdl->timeout_reset;
		1179	$hdl->timeout ($timeout);
		1180	};
		1181
		1182	# connected to proxy (or origin server)
		1183	my $connect_cb = sub {
		1184	my $fh = shift
		1185	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1186
		1187	return unless delete $state{connect_guard};
		1188
		1189	# get handle
		1190	$state{handle} = new AnyEvent::Handle
		1191	%{ $arg{handle_params} },
		1192	fh => $fh,
		1193	peername => $uhost,
		1194	tls_ctx => $arg{tls_ctx},
		1195	;
		1196
		1197	$prepare_handle->();
		1198
		1199	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1200
		1201	# now handle proxy-CONNECT method
		1202	if ($proxy && $uscheme eq "https") {
		1203	# oh dear, we have to wrap it into a connect request
		1204
		1205	my $auth = exists $hdr{"proxy-authorization"}
		1206	? "proxy-authorization: " . (delete $hdr{"proxy-authorization"}) . "\015\012"
		1207	: "";
		1208
		1209	# maybe re-use $uauthority with patched port?
		1210	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012$auth\015\012");
		1211	$state{handle}->push_read (line => $qr_nlnl, sub {
		1212	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1213	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1214
		1215	if ($2 == 200) {
		1216	$rpath = $upath;
		1217	$handle_actual_request->();
		1218	} else {
		1219	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1220	}
		1221	});
		1222	} else {
		1223	delete $hdr{"proxy-authorization"} unless $proxy;
		1224
		1225	$handle_actual_request->();
		1226	}
		1227	};
467		1228
468	_get_slot $uhost, sub {	1229	_get_slot $uhost, sub {
469	$state{slot_guard} = shift;	1230	$state{slot_guard} = shift;
470		1231
471	return unless $state{connect_guard};	1232	return unless $state{connect_guard};
472		1233
473	my $connect_cb = sub {	1234	# try to use an existing keepalive connection, but only if we, ourselves, plan
474	$state{fh} = shift	1235	# on a keepalive request (in theory, this should be a separate config option).
475	or do {	1236	if ($persistent && $KA_CACHE{$ka_key}) {
476	my $err = "$!";	1237	$was_persistent = 1;
477	%state = ();
478	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
479	};
480		1238
481	pop; # free memory, save a tree	1239	$state{handle} = ka_fetch $ka_key;
482		1240	# $state{handle}->destroyed
483	return unless delete $state{connect_guard};	1241	# and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
484		1242	$prepare_handle->();
485	# get handle	1243	# $state{handle}->destroyed
486	$state{handle} = new AnyEvent::Handle	1244	# and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
487	fh => $state{fh},
488	peername => $rhost,
489	tls_ctx => $arg{tls_ctx},
490	# these need to be reconfigured on keepalive handles
491	timeout => $timeout,
492	on_error => sub {
493	%state = ();
494	$cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
495	},
496	on_eof => sub {
497	%state = ();
498	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
499	},
500	;
501
502	# limit the number of persistent connections
503	# keepalive not yet supported
504	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
505	# ++$KA_COUNT{$_[1]};
506	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
507	# --$KA_COUNT{$_[1]}
508	# };
509	# $hdr{connection} = "keep-alive";
510	# } else {
511	delete $hdr{connection};
512	# }
513
514	$state{handle}->starttls ("connect") if $rscheme eq "https";
515
516	# handle actual, non-tunneled, request
517	my $handle_actual_request = sub {
518	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
519
520	# send request
521	$state{handle}->push_write (
522	"$method $rpath HTTP/1.0\015\012"
523	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
524	. "\015\012"
525	. (delete $arg{body})
526	);
527
528	# return if error occured during push_write()
529	return unless %state;
530
531	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
532
533	# status line and headers
534	$state{handle}->push_read (line => $qr_nlnl, sub {
535	my $keepalive = pop;
536
537	for ("$_[1]") {
538	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
539
540	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc
541	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
542
543	push @pseudo,
544	HTTPVersion => $1,
545	Status => $2,
546	Reason => $3,
547	;
548
549	# things seen, not parsed:
550	# p3pP="NON CUR OTPi OUR NOR UNI"
551
552	$hdr{lc $1} .= ",$2"
553	while /\G
554	([^:\000-\037]*):
555	[\011\040]*
556	((?: [^\012]+ | \012[\011\040] )*)
557	\012
558	/gxc;
559
560	/\G$/
561	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
562	}
563
564	# remove the "," prefix we added to all headers above
565	substr $_, 0, 1, ""
566	for values %hdr;
567
568	# patch in all pseudo headers
569	%hdr = (%hdr, @pseudo);
570
571	# redirect handling
572	# microsoft and other shitheads don't give a shit for following standards,
573	# try to support some common forms of broken Location headers.
574	if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
575	$hdr{location} =~ s/^\.\/+//;
576
577	my $url = "$rscheme://$uhost:$uport";
578
579	unless ($hdr{location} =~ s/^\///) {
580	$url .= $upath;
581	$url =~ s/\/[^\/]*$//;
582	}
583
584	$hdr{location} = "$url/$hdr{location}";
585	}
586
587	my $redirect;
588
589	if ($recurse) {
590	my $status = $hdr{Status};
591
592	# industry standard is to redirect POST as GET for
593	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
594	# also, the UA should ask the user for 301 and 307 and POST,
595	# industry standard seems to be to simply follow.
596	# we go with the industry standard.
597	if ($status == 301 or $status == 302 or $status == 303) {
598	# HTTP/1.1 is unclear on how to mutate the method
599	$method = "GET" unless $method eq "HEAD";
600	$redirect = 1;
601	} elsif ($status == 307) {
602	$redirect = 1;
603	}
604	}
605
606	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
607	$state{handle}->destroy if $state{handle};
608	%state = ();
609
610	if (defined $_[1]) {
611	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
612	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
613	}
614
615	# set-cookie processing
616	if ($arg{cookie_jar}) {
617	for ($hdr{"set-cookie"}) {
618	# parse NAME=VALUE
619	my @kv;
620
621	while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
622	my $name = $1;
623	my $value = $3;
624
625	unless ($value) {
626	$value = $2;
627	$value =~ s/\\(.)/$1/gs;
628	}
629
630	push @kv, $name => $value;
631
632	last unless /\G\s*;/gc;
633	}
634
635	last unless @kv;
636
637	my $name = shift @kv;
638	my %kv = (value => shift @kv, @kv);
639
640	my $cdom;
641	my $cpath = (delete $kv{path}) || "/";
642
643	if (exists $kv{domain}) {
644	$cdom = delete $kv{domain};
645
646	$cdom =~ s/^\.?/./; # make sure it starts with a "."
647
648	next if $cdom =~ /\.$/;
649
650	# this is not rfc-like and not netscape-like. go figure.
651	my $ndots = $cdom =~ y/.//;
652	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
653	} else {
654	$cdom = $uhost;
655	}
656
657	# store it
658	$arg{cookie_jar}{version} = 1;
659	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
660
661	redo if /\G\s*,/gc;
662	}
663	}
664
665	if ($redirect && exists $hdr{location}) {
666	# we ignore any errors, as it is very common to receive
667	# Content-Length != 0 but no actual body
668	# we also access %hdr, as $_[1] might be an erro
669	http_request (
670	$method => $hdr{location},
671	%arg,
672	recurse => $recurse - 1,
673	Redirect => [$_[0], \%hdr],
674	$cb);
675	} else {
676	$cb->($_[0], \%hdr);
677	}
678	};
679
680	my $len = $hdr{"content-length"};
681
682	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
683	$finish->(undef, 598 => "Request cancelled by on_header");
684	} elsif (
685	$hdr{Status} =~ /^(?:1..|204|205|304)$/
686	or $method eq "HEAD"
687	or (defined $len && !$len)
688	) {
689	# no body
690	$finish->("", undef, undef, 1);
691	} else {
692	# body handling, four different code paths
693	# for want_body_handle, on_body (2x), normal (2x)
694	# we might read too much here, but it does not matter yet (no pipelining)
695	if (!$redirect && $arg{want_body_handle}) {
696	$_[0]->on_eof (undef);
697	$_[0]->on_error (undef);
698	$_[0]->on_read (undef);
699
700	$finish->(delete $state{handle});
701
702	} elsif ($arg{on_body}) {
703	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
704	if ($len) {
705	$_[0]->on_read (sub {
706	$len -= length $_[0]{rbuf};
707
708	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
709	or $finish->(undef, 598 => "Request cancelled by on_body");
710
711	$len > 0
712	or $finish->("", undef, undef, 1);
713	});
714	} else {
715	$_[0]->on_eof (sub {
716	$finish->("");
717	});
718	$_[0]->on_read (sub {
719	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
720	or $finish->(undef, 598 => "Request cancelled by on_body");
721	});
722	}
723	} else {
724	$_[0]->on_eof (undef);
725
726	if ($len) {
727	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
728	$_[0]->on_read (sub {
729	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
730	if $len <= length $_[0]{rbuf};
731	});
732	} else {
733	$_[0]->on_error (sub {
734	($! == Errno::EPIPE || !$!)
735	? $finish->(delete $_[0]{rbuf})
736	: $finish->(undef, 599 => $_[2]);
737	});
738	$_[0]->on_read (sub { });
739	}
740	}
741	}
742	});
743	};
744
745	# now handle proxy-CONNECT method
746	if ($proxy && $uscheme eq "https") {
747	# oh dear, we have to wrap it into a connect request
748
749	# maybe re-use $uauthority with patched port?
750	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
751	$state{handle}->push_read (line => $qr_nlnl, sub {
752	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
753	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
754
755	if ($2 == 200) {
756	$rpath = $upath;	1245	$rpath = $upath;
757	&$handle_actual_request;	1246	$handle_actual_request->();
758	} else {	1247
759	%state = ();
760	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
761	}
762	});
763	} else {	1248	} else {
764	&$handle_actual_request;
765	}
766	};
767
768	my $tcp_connect = $arg{tcp_connect}	1249	my $tcp_connect = $arg{tcp_connect}
769	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1250	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
770		1251
771	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });	1252	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });
772		1253	}
773	};	1254	};
774		1255
775	defined wantarray && AnyEvent::Util::guard { %state = () }	1256	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
776	}	1257	}
777		1258
778	sub http_get($@) {	1259	sub http_get($@) {
779	unshift @_, "GET";	1260	unshift @_, "GET";
780	&http_request	1261	&http_request
…		…
798	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1279	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
799	the actual connection, which in turn uses AnyEvent::DNS to resolve	1280	the actual connection, which in turn uses AnyEvent::DNS to resolve
800	hostnames. The latter is a simple stub resolver and does no caching	1281	hostnames. The latter is a simple stub resolver and does no caching
801	on its own. If you want DNS caching, you currently have to provide	1282	on its own. If you want DNS caching, you currently have to provide
802	your own default resolver (by storing a suitable resolver object in	1283	your own default resolver (by storing a suitable resolver object in
803	C<$AnyEvent::DNS::RESOLVER>).	1284	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
804		1285
805	=head2 GLOBAL FUNCTIONS AND VARIABLES	1286	=head2 GLOBAL FUNCTIONS AND VARIABLES
806		1287
807	=over 4	1288	=over 4
808		1289
809	=item AnyEvent::HTTP::set_proxy "proxy-url"	1290	=item AnyEvent::HTTP::set_proxy "proxy-url"
810		1291
811	Sets the default proxy server to use. The proxy-url must begin with a	1292	Sets the default proxy server to use. The proxy-url must begin with a
812	string of the form C<http://host:port> (optionally C<https:...>), croaks	1293	string of the form C<http://host:port>, croaks otherwise.
813	otherwise.
814		1294
815	To clear an already-set proxy, use C<undef>.	1295	To clear an already-set proxy, use C<undef>.
		1296
		1297	When AnyEvent::HTTP is loaded for the first time it will query the
		1298	default proxy from the operating system, currently by looking at
		1299	C<$ENV{http_proxy>}.
		1300
		1301	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
		1302
		1303	Remove all cookies from the cookie jar that have been expired. If
		1304	C<$session_end> is given and true, then additionally remove all session
		1305	cookies.
		1306
		1307	You should call this function (with a true C<$session_end>) before you
		1308	save cookies to disk, and you should call this function after loading them
		1309	again. If you have a long-running program you can additionally call this
		1310	function from time to time.
		1311
		1312	A cookie jar is initially an empty hash-reference that is managed by this
		1313	module. Its format is subject to change, but currently it is as follows:
		1314
		1315	The key C<version> has to contain C<2>, otherwise the hash gets
		1316	cleared. All other keys are hostnames or IP addresses pointing to
		1317	hash-references. The key for these inner hash references is the
		1318	server path for which this cookie is meant, and the values are again
		1319	hash-references. Each key of those hash-references is a cookie name, and
		1320	the value, you guessed it, is another hash-reference, this time with the
		1321	key-value pairs from the cookie, except for C<expires> and C<max-age>,
		1322	which have been replaced by a C<_expires> key that contains the cookie
		1323	expiry timestamp. Session cookies are indicated by not having an
		1324	C<_expires> key.
		1325
		1326	Here is an example of a cookie jar with a single cookie, so you have a
		1327	chance of understanding the above paragraph:
		1328
		1329	{
		1330	version => 2,
		1331	"10.0.0.1" => {
		1332	"/" => {
		1333	"mythweb_id" => {
		1334	_expires => 1293917923,
		1335	value => "ooRung9dThee3ooyXooM1Ohm",
		1336	},
		1337	},
		1338	},
		1339	}
816		1340
817	=item $date = AnyEvent::HTTP::format_date $timestamp	1341	=item $date = AnyEvent::HTTP::format_date $timestamp
818		1342
819	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP	1343	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
820	Date (RFC 2616).	1344	Date (RFC 2616).
821		1345
822	=item $timestamp = AnyEvent::HTTP::parse_date $date	1346	=item $timestamp = AnyEvent::HTTP::parse_date $date
823		1347
824	Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX	1348	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
		1349	bunch of minor variations of those, and returns the corresponding POSIX
825	timestamp, or C<undef> if the date cannot be parsed.	1350	timestamp, or C<undef> if the date cannot be parsed.
826		1351
827	=item $AnyEvent::HTTP::MAX_RECURSE	1352	=item $AnyEvent::HTTP::MAX_RECURSE
828		1353
829	The default value for the C<recurse> request parameter (default: C<10>).	1354	The default value for the C<recurse> request parameter (default: C<10>).
		1355
		1356	=item $AnyEvent::HTTP::TIMEOUT
		1357
		1358	The default timeout for connection operations (default: C<300>).
830		1359
831	=item $AnyEvent::HTTP::USERAGENT	1360	=item $AnyEvent::HTTP::USERAGENT
832		1361
833	The default value for the C<User-Agent> header (the default is	1362	The default value for the C<User-Agent> header (the default is
834	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1363	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
835		1364
836	=item $AnyEvent::HTTP::MAX_PER_HOST	1365	=item $AnyEvent::HTTP::MAX_PER_HOST
837		1366
838	The maximum number of concurrent connections to the same host (identified	1367	The maximum number of concurrent connections to the same host (identified
839	by the hostname). If the limit is exceeded, then the additional requests	1368	by the hostname). If the limit is exceeded, then additional requests
840	are queued until previous connections are closed.	1369	are queued until previous connections are closed. Both persistent and
		1370	non-persistent connections are counted in this limit.
841		1371
842	The default value for this is C<4>, and it is highly advisable to not	1372	The default value for this is C<4>, and it is highly advisable to not
843	increase it.	1373	increase it much.
		1374
		1375	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1376	connections, older browsers used 2, newer ones (such as firefox 3)
		1377	typically use 6, and Opera uses 8 because like, they have the fastest
		1378	browser and give a shit for everybody else on the planet.
		1379
		1380	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1381
		1382	The time after which idle persistent connections get closed by
		1383	AnyEvent::HTTP (default: C<3>).
844		1384
845	=item $AnyEvent::HTTP::ACTIVE	1385	=item $AnyEvent::HTTP::ACTIVE
846		1386
847	The number of active connections. This is not the number of currently	1387	The number of active connections. This is not the number of currently
848	running requests, but the number of currently open and non-idle TCP	1388	running requests, but the number of currently open and non-idle TCP
849	connections. This number of can be useful for load-leveling.	1389	connections. This number can be useful for load-leveling.
850		1390
851	=back	1391	=back
852		1392
853	=cut	1393	=cut
854		1394
…		…
869	sub parse_date($) {	1409	sub parse_date($) {
870	my ($date) = @_;	1410	my ($date) = @_;
871		1411
872	my ($d, $m, $y, $H, $M, $S);	1412	my ($d, $m, $y, $H, $M, $S);
873		1413
874	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$/) {	1414	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$/) {
875	# RFC 822/1123, required by RFC 2616	1415	# RFC 822/1123, required by RFC 2616 (with " ")
		1416	# cookie dates (with "-")
		1417
876	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);	1418	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
877		1419
878	} 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$/) {	1420	} 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$/) {
879	# RFC 850	1421	# RFC 850
880	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);	1422	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
881		1423
882	} 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])$/) {	1424	} 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])$/) {
883	# ISO C's asctime	1425	# ISO C's asctime
884	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);	1426	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
885	}	1427	}
886	# other formats fail in the loop below	1428	# other formats fail in the loop below
887		1429
888	for (0..11) {	1430	for (0..11) {
889	if ($m eq $month[$_]) {	1431	if ($m eq $month[$_]) {
890	require Time::Local;	1432	require Time::Local;
891	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1433	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
892	}	1434	}
893	}	1435	}
894		1436
895	undef	1437	undef
896	}	1438	}
897		1439
898	sub set_proxy($) {	1440	sub set_proxy($) {
899	if (length $_[0]) {	1441	if (length $_[0]) {
900	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1442	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
901	or Carp::croak "$_[0]: invalid proxy URL";	1443	or Carp::croak "$_[0]: invalid proxy URL";
902	$PROXY = [$2, $3 || 3128, $1]	1444	$PROXY = [$2, $3 || 3128, $1]
903	} else {	1445	} else {
904	undef $PROXY;	1446	undef $PROXY;
905	}	1447	}
…		…
908	# initialise proxy from environment	1450	# initialise proxy from environment
909	eval {	1451	eval {
910	set_proxy $ENV{http_proxy};	1452	set_proxy $ENV{http_proxy};
911	};	1453	};
912		1454
		1455	=head2 SHOWCASE
		1456
		1457	This section contains some more elaborate "real-world" examples or code
		1458	snippets.
		1459
		1460	=head2 HTTP/1.1 FILE DOWNLOAD
		1461
		1462	Downloading files with HTTP can be quite tricky, especially when something
		1463	goes wrong and you want to resume.
		1464
		1465	Here is a function that initiates and resumes a download. It uses the
		1466	last modified time to check for file content changes, and works with many
		1467	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1468	on older servers.
		1469
		1470	It calls the completion callback with either C<undef>, which means a
		1471	nonretryable error occurred, C<0> when the download was partial and should
		1472	be retried, and C<1> if it was successful.
		1473
		1474	use AnyEvent::HTTP;
		1475
		1476	sub download($$$) {
		1477	my ($url, $file, $cb) = @_;
		1478
		1479	open my $fh, "+<", $file
		1480	or die "$file: $!";
		1481
		1482	my %hdr;
		1483	my $ofs = 0;
		1484
		1485	if (stat $fh and -s _) {
		1486	$ofs = -s _;
		1487	warn "-s is ", $ofs;
		1488	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1489	$hdr{"range"} = "bytes=$ofs-";
		1490	}
		1491
		1492	http_get $url,
		1493	headers => \%hdr,
		1494	on_header => sub {
		1495	my ($hdr) = @_;
		1496
		1497	if ($hdr->{Status} == 200 && $ofs) {
		1498	# resume failed
		1499	truncate $fh, $ofs = 0;
		1500	}
		1501
		1502	sysseek $fh, $ofs, 0;
		1503
		1504	1
		1505	},
		1506	on_body => sub {
		1507	my ($data, $hdr) = @_;
		1508
		1509	if ($hdr->{Status} =~ /^2/) {
		1510	length $data == syswrite $fh, $data
		1511	or return; # abort on write errors
		1512	}
		1513
		1514	1
		1515	},
		1516	sub {
		1517	my (undef, $hdr) = @_;
		1518
		1519	my $status = $hdr->{Status};
		1520
		1521	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1522	utime $time, $time, $fh;
		1523	}
		1524
		1525	if ($status == 200 || $status == 206 || $status == 416) {
		1526	# download ok || resume ok || file already fully downloaded
		1527	$cb->(1, $hdr);
		1528
		1529	} elsif ($status == 412) {
		1530	# file has changed while resuming, delete and retry
		1531	unlink $file;
		1532	$cb->(0, $hdr);
		1533
		1534	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1535	# retry later
		1536	$cb->(0, $hdr);
		1537
		1538	} else {
		1539	$cb->(undef, $hdr);
		1540	}
		1541	}
		1542	;
		1543	}
		1544
		1545	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1546	if ($_[0]) {
		1547	print "OK!\n";
		1548	} elsif (defined $_[0]) {
		1549	print "please retry later\n";
		1550	} else {
		1551	print "ERROR\n";
		1552	}
		1553	};
		1554
913	=head2 SOCKS PROXIES	1555	=head3 SOCKS PROXIES
914		1556
915	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1557	Socks proxies are not directly supported by AnyEvent::HTTP. You can
916	compile your perl to support socks, or use an external program such as	1558	compile your perl to support socks, or use an external program such as
917	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy	1559	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
918	transparently.	1560	transparently.

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