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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.64 by root, Fri Dec 31 02:53:29 2010 UTC vs.
Revision 1.138 by root, Fri Aug 5 20:45:09 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 = '1.46';	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(\%$$) {
		710	my ($state, $cb, $hdr) = @_;
		711
		712	&_destroy_state ($state);
		713
		714	$cb->(undef, $hdr);
		715	()
		716	}
		717
		718	our %IDEMPOTENT = (
		719	DELETE => 1,
		720	GET => 1,
		721	QUERY => 1,
		722	HEAD => 1,
		723	OPTIONS => 1,
		724	PUT => 1,
		725	TRACE => 1,
		726
		727	ACL => 1,
		728	"BASELINE-CONTROL" => 1,
		729	BIND => 1,
		730	CHECKIN => 1,
		731	CHECKOUT => 1,
		732	COPY => 1,
		733	LABEL => 1,
		734	LINK => 1,
		735	MERGE => 1,
		736	MKACTIVITY => 1,
		737	MKCALENDAR => 1,
		738	MKCOL => 1,
		739	MKREDIRECTREF => 1,
		740	MKWORKSPACE => 1,
		741	MOVE => 1,
		742	ORDERPATCH => 1,
		743	PROPFIND => 1,
		744	PROPPATCH => 1,
		745	REBIND => 1,
		746	REPORT => 1,
		747	SEARCH => 1,
		748	UNBIND => 1,
		749	UNCHECKOUT => 1,
		750	UNLINK => 1,
		751	UNLOCK => 1,
		752	UPDATE => 1,
		753	UPDATEREDIRECTREF => 1,
		754	"VERSION-CONTROL" => 1,
		755	);
361		756
362	sub http_request($$@) {	757	sub http_request($$@) {
363	my $cb = pop;	758	my $cb = pop;
364	my ($method, $url, %arg) = @_;	759	my ($method, $url, %arg) = @_;
365		760
…		…
383	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	778	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
384		779
385	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	780	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
386	if $recurse < 0;	781	if $recurse < 0;
387		782
388	my $proxy = $arg{proxy} || $PROXY;	783	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
389	my $timeout = $arg{timeout} || $TIMEOUT;	784	my $timeout = $arg{timeout} || $TIMEOUT;
390		785
391	my ($uscheme, $uauthority, $upath, $query, $fragment) =	786	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
392	$url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;	787	$url =~ m|^([^:]+):(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?$|;
393		788
394	$uscheme = lc $uscheme;	789	$uscheme = lc $uscheme;
395		790
396	my $uport = $uscheme eq "http" ? 80	791	my $uport = $uscheme eq "http" ? 80
397	: $uscheme eq "https" ? 443	792	: $uscheme eq "https" ? 443
398	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });	793	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
399		794
400	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	795	$uauthority =~ /^(?: .*\@ )? ([^\@]+?) (?: : (\d+) )?$/x
401	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	796	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
402		797
403	my $uhost = $1;	798	my $uhost = lc $1;
404	$uport = $2 if defined $2;	799	$uport = $2 if defined $2;
405		800
406	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	801	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
407	unless exists $hdr{host};	802	unless exists $hdr{host};
408		803
…		…
411		806
412	$upath =~ s%^/?%/%;	807	$upath =~ s%^/?%/%;
413		808
414	# cookie processing	809	# cookie processing
415	if (my $jar = $arg{cookie_jar}) {	810	if (my $jar = $arg{cookie_jar}) {
416	%$jar = () if $jar->{version} != 1;	811	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
417		812
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	813	$hdr{cookie} = join "; ", @$cookies
442	if @cookie;	814	if @$cookies;
443	}	815	}
444		816
445	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path	817	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
446		818
447	if ($proxy) {	819	if ($proxy) {
…		…
450	$rscheme = "http" unless defined $rscheme;	822	$rscheme = "http" unless defined $rscheme;
451		823
452	# don't support https requests over https-proxy transport,	824	# don't support https requests over https-proxy transport,
453	# can't be done with tls as spec'ed, unless you double-encrypt.	825	# can't be done with tls as spec'ed, unless you double-encrypt.
454	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	826	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		827
		828	$rhost = lc $rhost;
		829	$rscheme = lc $rscheme;
455	} else {	830	} else {
456	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	831	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
457	}	832	}
458		833
459	# leave out fragment and query string, just a heuristic	834	# leave out fragment and query string, just a heuristic
460	$hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};	835	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
461	$hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};	836	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
462		837
463	$hdr{"content-length"} = length $arg{body}	838	$hdr{"content-length"} = length $arg{body}
464	if length $arg{body} || $method ne "GET";	839	if length $arg{body} || $method ne "GET";
465		840
		841	my $idempotent = $IDEMPOTENT{$method};
		842
		843	# default value for keepalive is true iff the request is for an idempotent method
		844	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
		845	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
		846	my $was_persistent; # true if this is actually a recycled connection
		847
		848	# the key to use in the keepalive cache
		849	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		850
		851	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
		852	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
		853
466	my %state = (connect_guard => 1);	854	my %state = (connect_guard => 1);
		855
		856	my $ae_error = 595; # connecting
		857
		858	# handle actual, non-tunneled, request
		859	my $handle_actual_request = sub {
		860	$ae_error = 596; # request phase
		861
		862	my $hdl = $state{handle};
		863
		864	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
		865
		866	# send request
		867	$hdl->push_write (
		868	"$method $rpath HTTP/1.1\015\012"
		869	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		870	. "\015\012"
		871	. $arg{body}
		872	);
		873
		874	# return if error occurred during push_write()
		875	return unless %state;
		876
		877	# reduce memory usage, save a kitten, also re-use it for the response headers.
		878	%hdr = ();
		879
		880	# status line and headers
		881	$state{read_response} = sub {
		882	return unless %state;
		883
		884	for ("$_[1]") {
		885	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		886
		887	/^HTTP\/0*([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/gxci
		888	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
		889
		890	# 100 Continue handling
		891	# should not happen as we don't send expect: 100-continue,
		892	# but we handle it just in case.
		893	# since we send the request body regardless, if we get an error
		894	# we are out of-sync, which we currently do NOT handle correctly.
		895	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		896	if $2 eq 100;
		897
		898	push @pseudo,
		899	HTTPVersion => $1,
		900	Status => $2,
		901	Reason => $3,
		902	;
		903
		904	my $hdr = _parse_hdr
		905	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
		906
		907	%hdr = (%$hdr, @pseudo);
		908	}
		909
		910	# redirect handling
		911	# relative uri handling forced by microsoft and other shitheads.
		912	# we give our best and fall back to URI if available.
		913	if (exists $hdr{location}) {
		914	my $loc = $hdr{location};
		915
		916	if ($loc =~ m%^//%) { # //
		917	$loc = "$uscheme:$loc";
		918
		919	} elsif ($loc eq "") {
		920	$loc = $url;
		921
		922	} elsif ($loc !~ /^(?: $ | [^:\/?\#]+ : )/x) { # anything "simple"
		923	$loc =~ s/^\.\/+//;
		924
		925	if ($loc !~ m%^[.?#]%) {
		926	my $prefix = "$uscheme://$uauthority";
		927
		928	unless ($loc =~ s/^\///) {
		929	$prefix .= $upath;
		930	$prefix =~ s/\/[^\/]*$//;
		931	}
		932
		933	$loc = "$prefix/$loc";
		934
		935	} elsif (eval { require URI }) { # uri
		936	$loc = URI->new_abs ($loc, $url)->as_string;
		937
		938	} else {
		939	return _error %state, $cb, { @pseudo, Status => 599, Reason => "Cannot parse Location (URI module missing)" };
		940	#$hdr{Status} = 599;
		941	#$hdr{Reason} = "Unparsable Redirect (URI module missing)";
		942	#$recurse = 0;
		943	}
		944	}
		945
		946	$hdr{location} = $loc;
		947	}
		948
		949	my $redirect;
		950
		951	if ($recurse) {
		952	my $status = $hdr{Status};
		953
		954	# industry standard is to redirect POST as GET for
		955	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		956	# also, the UA should ask the user for 301 and 307 and POST,
		957	# industry standard seems to be to simply follow.
		958	# we go with the industry standard. 308 is defined
		959	# by rfc7538
		960	if ($status == 301 or $status == 302 or $status == 303) {
		961	$redirect = 1;
		962	# HTTP/1.1 is unclear on how to mutate the method
		963	unless ($method eq "HEAD") {
		964	$method = "GET";
		965	delete $arg{body};
		966	}
		967	} elsif ($status == 307 or $status == 308) {
		968	$redirect = 1;
		969	}
		970	}
		971
		972	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
		973	if ($state{handle}) {
		974	# handle keepalive
		975	if (
		976	$persistent
		977	&& $_[3]
		978	&& ($hdr{HTTPVersion} < 1.1
		979	? $hdr{connection} =~ /\bkeep-?alive\b/i
		980	: $hdr{connection} !~ /\bclose\b/i)
		981	) {
		982	ka_store $ka_key, delete $state{handle};
		983	} else {
		984	# no keepalive, destroy the handle
		985	$state{handle}->destroy;
		986	}
		987	}
		988
		989	%state = ();
		990
		991	if (defined $_[1]) {
		992	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		993	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		994	}
		995
		996	# set-cookie processing
		997	if ($arg{cookie_jar}) {
		998	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		999	}
		1000
		1001	if ($redirect && exists $hdr{location}) {
		1002	# we ignore any errors, as it is very common to receive
		1003	# Content-Length != 0 but no actual body
		1004	# we also access %hdr, as $_[1] might be an erro
		1005	$state{recurse} =
		1006	http_request (
		1007	$method => $hdr{location},
		1008	%arg,
		1009	recurse => $recurse - 1,
		1010	Redirect => [$_[0], \%hdr],
		1011	sub {
		1012	%state = ();
		1013	&$cb
		1014	},
		1015	);
		1016	} else {
		1017	$cb->($_[0], \%hdr);
		1018	}
		1019	};
		1020
		1021	$ae_error = 597; # body phase
		1022
		1023	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		1024
		1025	my $len = $chunked ? undef : $hdr{"content-length"};
		1026
		1027	# body handling, many different code paths
		1028	# - no body expected
		1029	# - want_body_handle
		1030	# - te chunked
		1031	# - 2x length known (with or without on_body)
		1032	# - 2x length not known (with or without on_body)
		1033	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		1034	$finish->(undef, 598 => "Request cancelled by on_header");
		1035	} elsif (
		1036	$hdr{Status} =~ /^(?:1..|204|205|304)$/
		1037	or $method eq "HEAD"
		1038	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		1039	) {
		1040	# no body
		1041	$finish->("", undef, undef, 1);
		1042
		1043	} elsif (!$redirect && $arg{want_body_handle}) {
		1044	$_[0]->on_eof (undef);
		1045	$_[0]->on_error (undef);
		1046	$_[0]->on_read (undef);
		1047
		1048	$finish->(delete $state{handle});
		1049
		1050	} elsif ($chunked) {
		1051	my $cl = 0;
		1052	my $body = "";
		1053	my $on_body = (!$redirect && $arg{on_body}) || sub { $body .= shift; 1 };
		1054
		1055	$state{read_chunk} = sub {
		1056	$_[1] =~ /^([0-9a-fA-F]+)/
		1057	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1058
		1059	my $len = hex $1;
		1060
		1061	if ($len) {
		1062	$cl += $len;
		1063
		1064	$_[0]->push_read (chunk => $len, sub {
		1065	$on_body->($_[1], \%hdr)
		1066	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1067
		1068	$_[0]->push_read (line => sub {
		1069	length $_[1]
		1070	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1071	$_[0]->push_read (line => $state{read_chunk});
		1072	});
		1073	});
		1074	} else {
		1075	$hdr{"content-length"} ||= $cl;
		1076
		1077	$_[0]->push_read (line => $qr_nlnl, sub {
		1078	if (length $_[1]) {
		1079	for ("$_[1]") {
		1080	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		1081
		1082	my $hdr = _parse_hdr
		1083	or return $finish->(undef, $ae_error => "Garbled response trailers");
		1084
		1085	%hdr = (%hdr, %$hdr);
		1086	}
		1087	}
		1088
		1089	$finish->($body, undef, undef, 1);
		1090	});
		1091	}
		1092	};
		1093
		1094	$_[0]->push_read (line => $state{read_chunk});
		1095
		1096	} elsif (!$redirect && $arg{on_body}) {
		1097	if (defined $len) {
		1098	$_[0]->on_read (sub {
		1099	$len -= length $_[0]{rbuf};
		1100
		1101	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1102	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1103
		1104	$len > 0
		1105	or $finish->("", undef, undef, 1);
		1106	});
		1107	} else {
		1108	$_[0]->on_eof (sub {
		1109	$finish->("");
		1110	});
		1111	$_[0]->on_read (sub {
		1112	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1113	or $finish->(undef, 598 => "Request cancelled by on_body");
		1114	});
		1115	}
		1116	} else {
		1117	$_[0]->on_eof (undef);
		1118
		1119	if (defined $len) {
		1120	$_[0]->on_read (sub {
		1121	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1122	if $len <= length $_[0]{rbuf};
		1123	});
		1124	} else {
		1125	$_[0]->on_error (sub {
		1126	($! == Errno::EPIPE || !$!)
		1127	? $finish->(delete $_[0]{rbuf})
		1128	: $finish->(undef, $ae_error => $_[2]);
		1129	});
		1130	$_[0]->on_read (sub { });
		1131	}
		1132	}
		1133	};
		1134
		1135	# if keepalive is enabled, then the server closing the connection
		1136	# before a response can happen legally - we retry on idempotent methods.
		1137	if ($was_persistent && $idempotent) {
		1138	my $old_eof = $hdl->{on_eof};
		1139	$hdl->{on_eof} = sub {
		1140	_destroy_state %state;
		1141
		1142	%state = ();
		1143	$state{recurse} =
		1144	http_request (
		1145	$method => $url,
		1146	%arg,
		1147	recurse => $recurse - 1,
		1148	persistent => 0,
		1149	sub {
		1150	%state = ();
		1151	&$cb
		1152	}
		1153	);
		1154	};
		1155	$hdl->on_read (sub {
		1156	return unless %state;
		1157
		1158	# as soon as we receive something, a connection close
		1159	# once more becomes a hard error
		1160	$hdl->{on_eof} = $old_eof;
		1161	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1162	});
		1163	} else {
		1164	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1165	}
		1166	};
		1167
		1168	my $prepare_handle = sub {
		1169	my ($hdl) = $state{handle};
		1170
		1171	$hdl->on_error (sub {
		1172	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1173	});
		1174	$hdl->on_eof (sub {
		1175	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1176	});
		1177	$hdl->timeout_reset;
		1178	$hdl->timeout ($timeout);
		1179	};
		1180
		1181	# connected to proxy (or origin server)
		1182	my $connect_cb = sub {
		1183	my $fh = shift
		1184	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1185
		1186	return unless delete $state{connect_guard};
		1187
		1188	# get handle
		1189	$state{handle} = new AnyEvent::Handle
		1190	%{ $arg{handle_params} },
		1191	fh => $fh,
		1192	peername => $uhost,
		1193	tls_ctx => $arg{tls_ctx},
		1194	;
		1195
		1196	$prepare_handle->();
		1197
		1198	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1199
		1200	# now handle proxy-CONNECT method
		1201	if ($proxy && $uscheme eq "https") {
		1202	# oh dear, we have to wrap it into a connect request
		1203
		1204	my $auth = exists $hdr{"proxy-authorization"}
		1205	? "proxy-authorization: " . (delete $hdr{"proxy-authorization"}) . "\015\012"
		1206	: "";
		1207
		1208	# maybe re-use $uauthority with patched port?
		1209	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012$auth\015\012");
		1210	$state{handle}->push_read (line => $qr_nlnl, sub {
		1211	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1212	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1213
		1214	if ($2 == 200) {
		1215	$rpath = $upath;
		1216	$handle_actual_request->();
		1217	} else {
		1218	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1219	}
		1220	});
		1221	} else {
		1222	delete $hdr{"proxy-authorization"} unless $proxy;
		1223
		1224	$handle_actual_request->();
		1225	}
		1226	};
467		1227
468	_get_slot $uhost, sub {	1228	_get_slot $uhost, sub {
469	$state{slot_guard} = shift;	1229	$state{slot_guard} = shift;
470		1230
471	return unless $state{connect_guard};	1231	return unless $state{connect_guard};
472		1232
473	my $connect_cb = sub {	1233	# try to use an existing keepalive connection, but only if we, ourselves, plan
474	$state{fh} = shift	1234	# on a keepalive request (in theory, this should be a separate config option).
475	or do {	1235	if ($persistent && $KA_CACHE{$ka_key}) {
476	my $err = "$!";	1236	$was_persistent = 1;
477	%state = ();
478	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
479	};
480		1237
481	pop; # free memory, save a tree	1238	$state{handle} = ka_fetch $ka_key;
482		1239	# $state{handle}->destroyed
483	return unless delete $state{connect_guard};	1240	# and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
484		1241	$prepare_handle->();
485	# get handle	1242	# $state{handle}->destroyed
486	$state{handle} = new AnyEvent::Handle	1243	# 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;	1244	$rpath = $upath;
757	&$handle_actual_request;	1245	$handle_actual_request->();
758	} else {	1246
759	%state = ();
760	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
761	}
762	});
763	} else {	1247	} else {
764	&$handle_actual_request;
765	}
766	};
767
768	my $tcp_connect = $arg{tcp_connect}	1248	my $tcp_connect = $arg{tcp_connect}
769	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1249	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
770		1250
771	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });	1251	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });
772		1252	}
773	};	1253	};
774		1254
775	defined wantarray && AnyEvent::Util::guard { %state = () }	1255	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
776	}	1256	}
777		1257
778	sub http_get($@) {	1258	sub http_get($@) {
779	unshift @_, "GET";	1259	unshift @_, "GET";
780	&http_request	1260	&http_request
…		…
798	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1278	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
799	the actual connection, which in turn uses AnyEvent::DNS to resolve	1279	the actual connection, which in turn uses AnyEvent::DNS to resolve
800	hostnames. The latter is a simple stub resolver and does no caching	1280	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	1281	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	1282	your own default resolver (by storing a suitable resolver object in
803	C<$AnyEvent::DNS::RESOLVER>).	1283	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
804		1284
805	=head2 GLOBAL FUNCTIONS AND VARIABLES	1285	=head2 GLOBAL FUNCTIONS AND VARIABLES
806		1286
807	=over 4	1287	=over 4
808		1288
809	=item AnyEvent::HTTP::set_proxy "proxy-url"	1289	=item AnyEvent::HTTP::set_proxy "proxy-url"
810		1290
811	Sets the default proxy server to use. The proxy-url must begin with a	1291	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	1292	string of the form C<http://host:port>, croaks otherwise.
813	otherwise.
814		1293
815	To clear an already-set proxy, use C<undef>.	1294	To clear an already-set proxy, use C<undef>.
		1295
		1296	When AnyEvent::HTTP is loaded for the first time it will query the
		1297	default proxy from the operating system, currently by looking at
		1298	C<$ENV{http_proxy>}.
		1299
		1300	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
		1301
		1302	Remove all cookies from the cookie jar that have been expired. If
		1303	C<$session_end> is given and true, then additionally remove all session
		1304	cookies.
		1305
		1306	You should call this function (with a true C<$session_end>) before you
		1307	save cookies to disk, and you should call this function after loading them
		1308	again. If you have a long-running program you can additionally call this
		1309	function from time to time.
		1310
		1311	A cookie jar is initially an empty hash-reference that is managed by this
		1312	module. Its format is subject to change, but currently it is as follows:
		1313
		1314	The key C<version> has to contain C<2>, otherwise the hash gets
		1315	cleared. All other keys are hostnames or IP addresses pointing to
		1316	hash-references. The key for these inner hash references is the
		1317	server path for which this cookie is meant, and the values are again
		1318	hash-references. Each key of those hash-references is a cookie name, and
		1319	the value, you guessed it, is another hash-reference, this time with the
		1320	key-value pairs from the cookie, except for C<expires> and C<max-age>,
		1321	which have been replaced by a C<_expires> key that contains the cookie
		1322	expiry timestamp. Session cookies are indicated by not having an
		1323	C<_expires> key.
		1324
		1325	Here is an example of a cookie jar with a single cookie, so you have a
		1326	chance of understanding the above paragraph:
		1327
		1328	{
		1329	version => 2,
		1330	"10.0.0.1" => {
		1331	"/" => {
		1332	"mythweb_id" => {
		1333	_expires => 1293917923,
		1334	value => "ooRung9dThee3ooyXooM1Ohm",
		1335	},
		1336	},
		1337	},
		1338	}
816		1339
817	=item $date = AnyEvent::HTTP::format_date $timestamp	1340	=item $date = AnyEvent::HTTP::format_date $timestamp
818		1341
819	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP	1342	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
820	Date (RFC 2616).	1343	Date (RFC 2616).
821		1344
822	=item $timestamp = AnyEvent::HTTP::parse_date $date	1345	=item $timestamp = AnyEvent::HTTP::parse_date $date
823		1346
824	Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX	1347	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
		1348	bunch of minor variations of those, and returns the corresponding POSIX
825	timestamp, or C<undef> if the date cannot be parsed.	1349	timestamp, or C<undef> if the date cannot be parsed.
826		1350
827	=item $AnyEvent::HTTP::MAX_RECURSE	1351	=item $AnyEvent::HTTP::MAX_RECURSE
828		1352
829	The default value for the C<recurse> request parameter (default: C<10>).	1353	The default value for the C<recurse> request parameter (default: C<10>).
		1354
		1355	=item $AnyEvent::HTTP::TIMEOUT
		1356
		1357	The default timeout for connection operations (default: C<300>).
830		1358
831	=item $AnyEvent::HTTP::USERAGENT	1359	=item $AnyEvent::HTTP::USERAGENT
832		1360
833	The default value for the C<User-Agent> header (the default is	1361	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)>).	1362	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
835		1363
836	=item $AnyEvent::HTTP::MAX_PER_HOST	1364	=item $AnyEvent::HTTP::MAX_PER_HOST
837		1365
838	The maximum number of concurrent connections to the same host (identified	1366	The maximum number of concurrent connections to the same host (identified
839	by the hostname). If the limit is exceeded, then the additional requests	1367	by the hostname). If the limit is exceeded, then additional requests
840	are queued until previous connections are closed.	1368	are queued until previous connections are closed. Both persistent and
		1369	non-persistent connections are counted in this limit.
841		1370
842	The default value for this is C<4>, and it is highly advisable to not	1371	The default value for this is C<4>, and it is highly advisable to not
843	increase it.	1372	increase it much.
		1373
		1374	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1375	connections, older browsers used 2, newer ones (such as firefox 3)
		1376	typically use 6, and Opera uses 8 because like, they have the fastest
		1377	browser and give a shit for everybody else on the planet.
		1378
		1379	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1380
		1381	The time after which idle persistent connections get closed by
		1382	AnyEvent::HTTP (default: C<3>).
844		1383
845	=item $AnyEvent::HTTP::ACTIVE	1384	=item $AnyEvent::HTTP::ACTIVE
846		1385
847	The number of active connections. This is not the number of currently	1386	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	1387	running requests, but the number of currently open and non-idle TCP
849	connections. This number of can be useful for load-leveling.	1388	connections. This number can be useful for load-leveling.
850		1389
851	=back	1390	=back
852		1391
853	=cut	1392	=cut
854		1393
…		…
869	sub parse_date($) {	1408	sub parse_date($) {
870	my ($date) = @_;	1409	my ($date) = @_;
871		1410
872	my ($d, $m, $y, $H, $M, $S);	1411	my ($d, $m, $y, $H, $M, $S);
873		1412
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$/) {	1413	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	1414	# RFC 822/1123, required by RFC 2616 (with " ")
		1415	# cookie dates (with "-")
		1416
876	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);	1417	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
877		1418
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$/) {	1419	} 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	1420	# RFC 850
880	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);	1421	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
881		1422
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])$/) {	1423	} 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	1424	# ISO C's asctime
884	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);	1425	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
885	}	1426	}
886	# other formats fail in the loop below	1427	# other formats fail in the loop below
887		1428
888	for (0..11) {	1429	for (0..11) {
889	if ($m eq $month[$_]) {	1430	if ($m eq $month[$_]) {
890	require Time::Local;	1431	require Time::Local;
891	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1432	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
892	}	1433	}
893	}	1434	}
894		1435
895	undef	1436	undef
896	}	1437	}
897		1438
898	sub set_proxy($) {	1439	sub set_proxy($) {
899	if (length $_[0]) {	1440	if (length $_[0]) {
900	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1441	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
901	or Carp::croak "$_[0]: invalid proxy URL";	1442	or Carp::croak "$_[0]: invalid proxy URL";
902	$PROXY = [$2, $3 || 3128, $1]	1443	$PROXY = [$2, $3 || 3128, $1]
903	} else {	1444	} else {
904	undef $PROXY;	1445	undef $PROXY;
905	}	1446	}
…		…
908	# initialise proxy from environment	1449	# initialise proxy from environment
909	eval {	1450	eval {
910	set_proxy $ENV{http_proxy};	1451	set_proxy $ENV{http_proxy};
911	};	1452	};
912		1453
		1454	=head2 SHOWCASE
		1455
		1456	This section contains some more elaborate "real-world" examples or code
		1457	snippets.
		1458
		1459	=head2 HTTP/1.1 FILE DOWNLOAD
		1460
		1461	Downloading files with HTTP can be quite tricky, especially when something
		1462	goes wrong and you want to resume.
		1463
		1464	Here is a function that initiates and resumes a download. It uses the
		1465	last modified time to check for file content changes, and works with many
		1466	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1467	on older servers.
		1468
		1469	It calls the completion callback with either C<undef>, which means a
		1470	nonretryable error occurred, C<0> when the download was partial and should
		1471	be retried, and C<1> if it was successful.
		1472
		1473	use AnyEvent::HTTP;
		1474
		1475	sub download($$$) {
		1476	my ($url, $file, $cb) = @_;
		1477
		1478	open my $fh, "+<", $file
		1479	or die "$file: $!";
		1480
		1481	my %hdr;
		1482	my $ofs = 0;
		1483
		1484	if (stat $fh and -s _) {
		1485	$ofs = -s _;
		1486	warn "-s is ", $ofs;
		1487	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1488	$hdr{"range"} = "bytes=$ofs-";
		1489	}
		1490
		1491	http_get $url,
		1492	headers => \%hdr,
		1493	on_header => sub {
		1494	my ($hdr) = @_;
		1495
		1496	if ($hdr->{Status} == 200 && $ofs) {
		1497	# resume failed
		1498	truncate $fh, $ofs = 0;
		1499	}
		1500
		1501	sysseek $fh, $ofs, 0;
		1502
		1503	1
		1504	},
		1505	on_body => sub {
		1506	my ($data, $hdr) = @_;
		1507
		1508	if ($hdr->{Status} =~ /^2/) {
		1509	length $data == syswrite $fh, $data
		1510	or return; # abort on write errors
		1511	}
		1512
		1513	1
		1514	},
		1515	sub {
		1516	my (undef, $hdr) = @_;
		1517
		1518	my $status = $hdr->{Status};
		1519
		1520	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1521	utime $time, $time, $fh;
		1522	}
		1523
		1524	if ($status == 200 || $status == 206 || $status == 416) {
		1525	# download ok || resume ok || file already fully downloaded
		1526	$cb->(1, $hdr);
		1527
		1528	} elsif ($status == 412) {
		1529	# file has changed while resuming, delete and retry
		1530	unlink $file;
		1531	$cb->(0, $hdr);
		1532
		1533	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1534	# retry later
		1535	$cb->(0, $hdr);
		1536
		1537	} else {
		1538	$cb->(undef, $hdr);
		1539	}
		1540	}
		1541	;
		1542	}
		1543
		1544	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1545	if ($_[0]) {
		1546	print "OK!\n";
		1547	} elsif (defined $_[0]) {
		1548	print "please retry later\n";
		1549	} else {
		1550	print "ERROR\n";
		1551	}
		1552	};
		1553
913	=head2 SOCKS PROXIES	1554	=head3 SOCKS PROXIES
914		1555
915	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1556	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	1557	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	1558	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
918	transparently.	1559	transparently.

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