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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.63 by root, Thu Dec 30 04:31:55 2010 UTC vs.
Revision 1.136 by root, Wed Oct 16 01:20:02 2019 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 = 2.24;
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.	100	three parts of the HTTP Status-Line of the same name. If an error occurs
		101	during the body phase of a request, then the original C<Status> and
		102	C<Reason> values from the header are available as C<OrigStatus> and
		103	C<OrigReason>.
106		104
107	The pseudo-header C<URL> contains the actual URL (which can differ from	105	The pseudo-header C<URL> contains the actual URL (which can differ from
108	the requested URL when following redirects - for example, you might get	106	the requested URL when following redirects - for example, you might get
109	an error that your URL scheme is not supported even though your URL is a	107	an error that your URL scheme is not supported even though your URL is a
110	valid http URL because it redirected to an ftp URL, in which case you can	108	valid http URL because it redirected to an ftp URL, in which case you can
…		…
119		117
120	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
121	joined together with a comma (C<,>), as per the HTTP spec.	119	joined together with a comma (C<,>), as per the HTTP spec.
122		120
123	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,
124	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>	122	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be
125	(usually C<599>) and the C<Reason> pseudo-header will contain an error	123	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
126	message.	124	message. Currently the following status codes are used:
		125
		126	=over 4
		127
		128	=item 595 - errors during connection establishment, proxy handshake.
		129
		130	=item 596 - errors during TLS negotiation, request sending and header processing.
		131
		132	=item 597 - errors during body receiving or processing.
		133
		134	=item 598 - user aborted request via C<on_header> or C<on_body>.
		135
		136	=item 599 - other, usually nonretryable, errors (garbled URL etc.).
		137
		138	=back
127		139
128	A typical callback might look like this:	140	A typical callback might look like this:
129		141
130	sub {	142	sub {
131	my ($body, $hdr) = @_;	143	my ($body, $hdr) = @_;
…		…
142		154
143	=over 4	155	=over 4
144		156
145	=item recurse => $count (default: $MAX_RECURSE)	157	=item recurse => $count (default: $MAX_RECURSE)
146		158
147	Whether to recurse requests or not, e.g. on redirects, authentication	159	Whether to recurse requests or not, e.g. on redirects, authentication and
148	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.
149		166
150	=item headers => hashref	167	=item headers => hashref
151		168
152	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
153	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
154	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:>
155	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
156	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.
157		181
158	=item timeout => $seconds	182	=item timeout => $seconds
159		183
160	The time-out to use for various stages - each connect attempt will reset	184	The time-out to use for various stages - each connect attempt will reset
161	the timeout, as will read or write activity, i.e. this is not an overall	185	the timeout, as will read or write activity, i.e. this is not an overall
…		…
163		187
164	Default timeout is 5 minutes.	188	Default timeout is 5 minutes.
165		189
166	=item proxy => [$host, $port[, $scheme]] or undef	190	=item proxy => [$host, $port[, $scheme]] or undef
167		191
168	Use the given http proxy for all requests. If not specified, then the	192	Use the given http proxy for all requests, or no proxy if C<undef> is
169	default proxy (as specified by C<$ENV{http_proxy}>) is used.	193	used.
170		194
171	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.
172	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>.
173		207
174	=item body => $string	208	=item body => $string
175		209
176	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
177	this module might offer more options).	211	this module might offer more options).
178		212
179	=item cookie_jar => $hash_ref	213	=item cookie_jar => $hash_ref
180		214
181	Passing this parameter enables (simplified) cookie-processing, loosely	215	Passing this parameter enables (simplified) cookie-processing, loosely
182	based on the original netscape specification.	216	based on the original netscape specification.
183		217
184	The C<$hash_ref> must be an (initially empty) hash reference which will	218	The C<$hash_ref> must be an (initially empty) hash reference which
185	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
186	persistent storage with something like JSON or Storable, but this is not	220	to persistent storage with something like JSON or Storable - see the
187	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.
188		224
189	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
190	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
191	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
192	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
193	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.
194		234
195	=item tls_ctx => $scheme | $tls_ctx	235	=item tls_ctx => $scheme | $tls_ctx
196		236
197	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
198	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
…		…
202	verification) TLS context.	242	verification) TLS context.
203		243
204	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
205	me the page, no matter what".	245	me the page, no matter what".
206		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
207	=item on_prepare => $callback->($fh)	259	=item on_prepare => $callback->($fh)
208		260
209	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
210	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
211	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	263	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
212	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
213	timeout). See the description for the C<$prepare_cb> argument of	265	timeout). See the description for the C<$prepare_cb> argument of
214	C<AnyEvent::Socket::tcp_connect> for details.	266	C<AnyEvent::Socket::tcp_connect> for details.
215		267
…		…
219	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>	271	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
220	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 -
221	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
222	may always return a connection guard object.	274	may always return a connection guard object.
223		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
224	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
225	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
226	but fast) host => IP address caching or even socks protocol support.	284	but fast) host => IP address caching or even socks protocol support.
227		285
228	=item on_header => $callback->($headers)	286	=item on_header => $callback->($headers)
…		…
237		295
238	This callback is useful, among other things, to quickly reject unwanted	296	This callback is useful, among other things, to quickly reject unwanted
239	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
240	doing a C<HEAD> request.	298	doing a C<HEAD> request.
241		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
242	Example: cancel the request unless the content-type is "text/html".	304	Example: cancel the request unless the content-type is "text/html".
243		305
244	on_header => sub {	306	on_header => sub {
245	$_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/	307	$_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/
246	},	308	},
…		…
252	string instead of the body data.	314	string instead of the body data.
253		315
254	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),
255	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
256	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.
257		322
258	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
259	(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
260	be extracted, or when the body should be processed incrementally.	325	be extracted, or when the body should be processed incrementally.
261		326
…		…
273	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
274	callback will receive the L<AnyEvent::Handle> object associated with the	339	callback will receive the L<AnyEvent::Handle> object associated with the
275	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
276	(e.g. status C<304>), the empty string will be passed.	341	(e.g. status C<304>), the empty string will be passed.
277		342
278	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
279	a proxy, be a persistent connection etc., and configured in unspecified	344	to a proxy, be a persistent connection, use chunked transfer encoding
280	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
281	module anymore).	346	handle (it will not be used by this module anymore).
282		347
283	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
284	headers, an interactive protocol is used (typical example would be the	349	headers, an interactive protocol is used (typical example would be the
285	push-style twitter API which starts a JSON/XML stream).	350	push-style twitter API which starts a JSON/XML stream).
286		351
287	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
288	that doesn't solve your problem in a better way.	353	that doesn't solve your problem in a better way.
289		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 => $boolean
		374
		375	Only used when C<persistent> is also true. This parameter decides whether
		376	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		377	(as opposed to only a HTTP/1.1 persistent connection).
		378
		379	The default is true, except when using a proxy, in which case it defaults
		380	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		381
		382	=item handle_params => { key => value ... }
		383
		384	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		385	constructor that is called - not all requests will create a handle, and
		386	sometimes more than one is created, so this parameter is only good for
		387	setting hints.
		388
		389	Example: set the maximum read size to 4096, to potentially conserve memory
		390	at the cost of speed.
		391
		392	handle_params => {
		393	max_read_size => 4096,
		394	},
		395
290	=back	396	=back
291		397
292	Example: make a simple HTTP GET request for http://www.nethype.de/	398	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		399	the response body.
293		400
294	http_request GET => "http://www.nethype.de/", sub {	401	http_request GET => "http://www.nethype.de/", sub {
295	my ($body, $hdr) = @_;	402	my ($body, $hdr) = @_;
296	print "$body\n";	403	print "$body\n";
297	};	404	};
298		405
299	Example: make a HTTP HEAD request on https://www.google.com/, use a	406	Example: do a HTTP HEAD request on https://www.google.com/, use a
300	timeout of 30 seconds.	407	timeout of 30 seconds.
301		408
302	http_request	409	http_request
303	GET => "https://www.google.com",	410	HEAD => "https://www.google.com",
		411	headers => { "user-agent" => "MySearchClient 1.0" },
304	timeout => 30,	412	timeout => 30,
305	sub {	413	sub {
306	my ($body, $hdr) = @_;	414	my ($body, $hdr) = @_;
307	use Data::Dumper;	415	use Data::Dumper;
308	print Dumper $hdr;	416	print Dumper $hdr;
309	}	417	}
310	;	418	;
311		419
312	Example: make another simple HTTP GET request, but immediately try to	420	Example: do another simple HTTP GET request, but immediately try to
313	cancel it.	421	cancel it.
314		422
315	my $request = http_request GET => "http://www.nethype.de/", sub {	423	my $request = http_request GET => "http://www.nethype.de/", sub {
316	my ($body, $hdr) = @_;	424	my ($body, $hdr) = @_;
317	print "$body\n";	425	print "$body\n";
318	};	426	};
319		427
320	undef $request;	428	undef $request;
321		429
322	=cut	430	=cut
		431
		432	#############################################################################
		433	# wait queue/slots
323		434
324	sub _slot_schedule;	435	sub _slot_schedule;
325	sub _slot_schedule($) {	436	sub _slot_schedule($) {
326	my $host = shift;	437	my $host = shift;
327		438
…		…
349	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	460	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
350		461
351	_slot_schedule $_[0];	462	_slot_schedule $_[0];
352	}	463	}
353		464
		465	#############################################################################
		466	# cookie handling
		467
		468	# expire cookies
		469	sub cookie_jar_expire($;$) {
		470	my ($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
354	our $qr_nlnl = qr{(?<![^\012])\015?\012};	695	our $qr_nlnl = qr{(?<![^\012])\015?\012};
355		696
356	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	697	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
357	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(\%$$) {
		710	my ($state, $cb, $hdr) = @_;
		711
		712	&_destroy_state ($state);
		713
		714	$cb->(undef, $hdr);
		715	()
		716	}
		717
		718	our %IDEMPOTENT = (
		719	DELETE => 1,
		720	GET => 1,
		721	HEAD => 1,
		722	OPTIONS => 1,
		723	PUT => 1,
		724	TRACE => 1,
		725
		726	ACL => 1,
		727	"BASELINE-CONTROL" => 1,
		728	BIND => 1,
		729	CHECKIN => 1,
		730	CHECKOUT => 1,
		731	COPY => 1,
		732	LABEL => 1,
		733	LINK => 1,
		734	MERGE => 1,
		735	MKACTIVITY => 1,
		736	MKCALENDAR => 1,
		737	MKCOL => 1,
		738	MKREDIRECTREF => 1,
		739	MKWORKSPACE => 1,
		740	MOVE => 1,
		741	ORDERPATCH => 1,
		742	PROPFIND => 1,
		743	PROPPATCH => 1,
		744	REBIND => 1,
		745	REPORT => 1,
		746	SEARCH => 1,
		747	UNBIND => 1,
		748	UNCHECKOUT => 1,
		749	UNLINK => 1,
		750	UNLOCK => 1,
		751	UPDATE => 1,
		752	UPDATEREDIRECTREF => 1,
		753	"VERSION-CONTROL" => 1,
		754	);
358		755
359	sub http_request($$@) {	756	sub http_request($$@) {
360	my $cb = pop;	757	my $cb = pop;
361	my ($method, $url, %arg) = @_;	758	my ($method, $url, %arg) = @_;
362		759
…		…
377	my @pseudo = (URL => $url);	774	my @pseudo = (URL => $url);
378	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};	775	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
379		776
380	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	777	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
381		778
382	return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })	779	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
383	if $recurse < 0;	780	if $recurse < 0;
384		781
385	my $proxy = $arg{proxy} || $PROXY;	782	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
386	my $timeout = $arg{timeout} || $TIMEOUT;	783	my $timeout = $arg{timeout} || $TIMEOUT;
387		784
388	my ($uscheme, $uauthority, $upath, $query, $fragment) =	785	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
389	$url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;	786	$url =~ m|^([^:]+):(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?$|;
390		787
391	$uscheme = lc $uscheme;	788	$uscheme = lc $uscheme;
392		789
393	my $uport = $uscheme eq "http" ? 80	790	my $uport = $uscheme eq "http" ? 80
394	: $uscheme eq "https" ? 443	791	: $uscheme eq "https" ? 443
395	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", @pseudo });	792	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
396		793
397	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	794	$uauthority =~ /^(?: .*\@ )? ([^\@]+?) (?: : (\d+) )?$/x
398	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });	795	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
399		796
400	my $uhost = $1;	797	my $uhost = lc $1;
401	$uport = $2 if defined $2;	798	$uport = $2 if defined $2;
402		799
403	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	800	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
404	unless exists $hdr{host};	801	unless exists $hdr{host};
405		802
…		…
408		805
409	$upath =~ s%^/?%/%;	806	$upath =~ s%^/?%/%;
410		807
411	# cookie processing	808	# cookie processing
412	if (my $jar = $arg{cookie_jar}) {	809	if (my $jar = $arg{cookie_jar}) {
413	%$jar = () if $jar->{version} != 1;	810	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
414		811
415	my @cookie;
416
417	while (my ($chost, $v) = each %$jar) {
418	if ($chost =~ /^\./) {
419	next unless $chost eq substr $uhost, -length $chost;
420	} elsif ($chost =~ /\./) {
421	next unless $chost eq $uhost;
422	} else {
423	next;
424	}
425
426	while (my ($cpath, $v) = each %$v) {
427	next unless $cpath eq substr $upath, 0, length $cpath;
428
429	while (my ($k, $v) = each %$v) {
430	next if $uscheme ne "https" && exists $v->{secure};
431	my $value = $v->{value};
432	$value =~ s/([\\"])/\\$1/g;
433	push @cookie, "$k=\"$value\"";
434	}
435	}
436	}
437
438	$hdr{cookie} = join "; ", @cookie	812	$hdr{cookie} = join "; ", @$cookies
439	if @cookie;	813	if @$cookies;
440	}	814	}
441		815
442	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path	816	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
443		817
444	if ($proxy) {	818	if ($proxy) {
…		…
447	$rscheme = "http" unless defined $rscheme;	821	$rscheme = "http" unless defined $rscheme;
448		822
449	# don't support https requests over https-proxy transport,	823	# don't support https requests over https-proxy transport,
450	# can't be done with tls as spec'ed, unless you double-encrypt.	824	# can't be done with tls as spec'ed, unless you double-encrypt.
451	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	825	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		826
		827	$rhost = lc $rhost;
		828	$rscheme = lc $rscheme;
452	} else {	829	} else {
453	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	830	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
454	}	831	}
455		832
456	# leave out fragment and query string, just a heuristic	833	# leave out fragment and query string, just a heuristic
457	$hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};	834	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
458	$hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};	835	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
459		836
460	$hdr{"content-length"} = length $arg{body}	837	$hdr{"content-length"} = length $arg{body}
461	if length $arg{body} || $method ne "GET";	838	if length $arg{body} || $method ne "GET";
462		839
		840	my $idempotent = $IDEMPOTENT{$method};
		841
		842	# default value for keepalive is true iff the request is for an idempotent method
		843	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
		844	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
		845	my $was_persistent; # true if this is actually a recycled connection
		846
		847	# the key to use in the keepalive cache
		848	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		849
		850	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
		851	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
		852
463	my %state = (connect_guard => 1);	853	my %state = (connect_guard => 1);
		854
		855	my $ae_error = 595; # connecting
		856
		857	# handle actual, non-tunneled, request
		858	my $handle_actual_request = sub {
		859	$ae_error = 596; # request phase
		860
		861	my $hdl = $state{handle};
		862
		863	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
		864
		865	# send request
		866	$hdl->push_write (
		867	"$method $rpath HTTP/1.1\015\012"
		868	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		869	. "\015\012"
		870	. $arg{body}
		871	);
		872
		873	# return if error occurred during push_write()
		874	return unless %state;
		875
		876	# reduce memory usage, save a kitten, also re-use it for the response headers.
		877	%hdr = ();
		878
		879	# status line and headers
		880	$state{read_response} = sub {
		881	return unless %state;
		882
		883	for ("$_[1]") {
		884	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		885
		886	/^HTTP\/0*([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/gxci
		887	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
		888
		889	# 100 Continue handling
		890	# should not happen as we don't send expect: 100-continue,
		891	# but we handle it just in case.
		892	# since we send the request body regardless, if we get an error
		893	# we are out of-sync, which we currently do NOT handle correctly.
		894	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		895	if $2 eq 100;
		896
		897	push @pseudo,
		898	HTTPVersion => $1,
		899	Status => $2,
		900	Reason => $3,
		901	;
		902
		903	my $hdr = _parse_hdr
		904	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
		905
		906	%hdr = (%$hdr, @pseudo);
		907	}
		908
		909	# redirect handling
		910	# relative uri handling forced by microsoft and other shitheads.
		911	# we give our best and fall back to URI if available.
		912	if (exists $hdr{location}) {
		913	my $loc = $hdr{location};
		914
		915	if ($loc =~ m%^//%) { # //
		916	$loc = "$uscheme:$loc";
		917
		918	} elsif ($loc eq "") {
		919	$loc = $url;
		920
		921	} elsif ($loc !~ /^(?: $ | [^:\/?\#]+ : )/x) { # anything "simple"
		922	$loc =~ s/^\.\/+//;
		923
		924	if ($loc !~ m%^[.?#]%) {
		925	my $prefix = "$uscheme://$uauthority";
		926
		927	unless ($loc =~ s/^\///) {
		928	$prefix .= $upath;
		929	$prefix =~ s/\/[^\/]*$//;
		930	}
		931
		932	$loc = "$prefix/$loc";
		933
		934	} elsif (eval { require URI }) { # uri
		935	$loc = URI->new_abs ($loc, $url)->as_string;
		936
		937	} else {
		938	return _error %state, $cb, { @pseudo, Status => 599, Reason => "Cannot parse Location (URI module missing)" };
		939	#$hdr{Status} = 599;
		940	#$hdr{Reason} = "Unparsable Redirect (URI module missing)";
		941	#$recurse = 0;
		942	}
		943	}
		944
		945	$hdr{location} = $loc;
		946	}
		947
		948	my $redirect;
		949
		950	if ($recurse) {
		951	my $status = $hdr{Status};
		952
		953	# industry standard is to redirect POST as GET for
		954	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		955	# also, the UA should ask the user for 301 and 307 and POST,
		956	# industry standard seems to be to simply follow.
		957	# we go with the industry standard. 308 is defined
		958	# by rfc7538
		959	if ($status == 301 or $status == 302 or $status == 303) {
		960	$redirect = 1;
		961	# HTTP/1.1 is unclear on how to mutate the method
		962	unless ($method eq "HEAD") {
		963	$method = "GET";
		964	delete $arg{body};
		965	}
		966	} elsif ($status == 307 or $status == 308) {
		967	$redirect = 1;
		968	}
		969	}
		970
		971	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
		972	if ($state{handle}) {
		973	# handle keepalive
		974	if (
		975	$persistent
		976	&& $_[3]
		977	&& ($hdr{HTTPVersion} < 1.1
		978	? $hdr{connection} =~ /\bkeep-?alive\b/i
		979	: $hdr{connection} !~ /\bclose\b/i)
		980	) {
		981	ka_store $ka_key, delete $state{handle};
		982	} else {
		983	# no keepalive, destroy the handle
		984	$state{handle}->destroy;
		985	}
		986	}
		987
		988	%state = ();
		989
		990	if (defined $_[1]) {
		991	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		992	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		993	}
		994
		995	# set-cookie processing
		996	if ($arg{cookie_jar}) {
		997	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		998	}
		999
		1000	if ($redirect && exists $hdr{location}) {
		1001	# we ignore any errors, as it is very common to receive
		1002	# Content-Length != 0 but no actual body
		1003	# we also access %hdr, as $_[1] might be an erro
		1004	$state{recurse} =
		1005	http_request (
		1006	$method => $hdr{location},
		1007	%arg,
		1008	recurse => $recurse - 1,
		1009	Redirect => [$_[0], \%hdr],
		1010	sub {
		1011	%state = ();
		1012	&$cb
		1013	},
		1014	);
		1015	} else {
		1016	$cb->($_[0], \%hdr);
		1017	}
		1018	};
		1019
		1020	$ae_error = 597; # body phase
		1021
		1022	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		1023
		1024	my $len = $chunked ? undef : $hdr{"content-length"};
		1025
		1026	# body handling, many different code paths
		1027	# - no body expected
		1028	# - want_body_handle
		1029	# - te chunked
		1030	# - 2x length known (with or without on_body)
		1031	# - 2x length not known (with or without on_body)
		1032	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		1033	$finish->(undef, 598 => "Request cancelled by on_header");
		1034	} elsif (
		1035	$hdr{Status} =~ /^(?:1..|204|205|304)$/
		1036	or $method eq "HEAD"
		1037	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		1038	) {
		1039	# no body
		1040	$finish->("", undef, undef, 1);
		1041
		1042	} elsif (!$redirect && $arg{want_body_handle}) {
		1043	$_[0]->on_eof (undef);
		1044	$_[0]->on_error (undef);
		1045	$_[0]->on_read (undef);
		1046
		1047	$finish->(delete $state{handle});
		1048
		1049	} elsif ($chunked) {
		1050	my $cl = 0;
		1051	my $body = "";
		1052	my $on_body = (!$redirect && $arg{on_body}) || sub { $body .= shift; 1 };
		1053
		1054	$state{read_chunk} = sub {
		1055	$_[1] =~ /^([0-9a-fA-F]+)/
		1056	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1057
		1058	my $len = hex $1;
		1059
		1060	if ($len) {
		1061	$cl += $len;
		1062
		1063	$_[0]->push_read (chunk => $len, sub {
		1064	$on_body->($_[1], \%hdr)
		1065	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1066
		1067	$_[0]->push_read (line => sub {
		1068	length $_[1]
		1069	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1070	$_[0]->push_read (line => $state{read_chunk});
		1071	});
		1072	});
		1073	} else {
		1074	$hdr{"content-length"} ||= $cl;
		1075
		1076	$_[0]->push_read (line => $qr_nlnl, sub {
		1077	if (length $_[1]) {
		1078	for ("$_[1]") {
		1079	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		1080
		1081	my $hdr = _parse_hdr
		1082	or return $finish->(undef, $ae_error => "Garbled response trailers");
		1083
		1084	%hdr = (%hdr, %$hdr);
		1085	}
		1086	}
		1087
		1088	$finish->($body, undef, undef, 1);
		1089	});
		1090	}
		1091	};
		1092
		1093	$_[0]->push_read (line => $state{read_chunk});
		1094
		1095	} elsif (!$redirect && $arg{on_body}) {
		1096	if (defined $len) {
		1097	$_[0]->on_read (sub {
		1098	$len -= length $_[0]{rbuf};
		1099
		1100	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1101	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1102
		1103	$len > 0
		1104	or $finish->("", undef, undef, 1);
		1105	});
		1106	} else {
		1107	$_[0]->on_eof (sub {
		1108	$finish->("");
		1109	});
		1110	$_[0]->on_read (sub {
		1111	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1112	or $finish->(undef, 598 => "Request cancelled by on_body");
		1113	});
		1114	}
		1115	} else {
		1116	$_[0]->on_eof (undef);
		1117
		1118	if (defined $len) {
		1119	$_[0]->on_read (sub {
		1120	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1121	if $len <= length $_[0]{rbuf};
		1122	});
		1123	} else {
		1124	$_[0]->on_error (sub {
		1125	($! == Errno::EPIPE || !$!)
		1126	? $finish->(delete $_[0]{rbuf})
		1127	: $finish->(undef, $ae_error => $_[2]);
		1128	});
		1129	$_[0]->on_read (sub { });
		1130	}
		1131	}
		1132	};
		1133
		1134	# if keepalive is enabled, then the server closing the connection
		1135	# before a response can happen legally - we retry on idempotent methods.
		1136	if ($was_persistent && $idempotent) {
		1137	my $old_eof = $hdl->{on_eof};
		1138	$hdl->{on_eof} = sub {
		1139	_destroy_state %state;
		1140
		1141	%state = ();
		1142	$state{recurse} =
		1143	http_request (
		1144	$method => $url,
		1145	%arg,
		1146	recurse => $recurse - 1,
		1147	persistent => 0,
		1148	sub {
		1149	%state = ();
		1150	&$cb
		1151	}
		1152	);
		1153	};
		1154	$hdl->on_read (sub {
		1155	return unless %state;
		1156
		1157	# as soon as we receive something, a connection close
		1158	# once more becomes a hard error
		1159	$hdl->{on_eof} = $old_eof;
		1160	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1161	});
		1162	} else {
		1163	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1164	}
		1165	};
		1166
		1167	my $prepare_handle = sub {
		1168	my ($hdl) = $state{handle};
		1169
		1170	$hdl->on_error (sub {
		1171	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1172	});
		1173	$hdl->on_eof (sub {
		1174	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1175	});
		1176	$hdl->timeout_reset;
		1177	$hdl->timeout ($timeout);
		1178	};
		1179
		1180	# connected to proxy (or origin server)
		1181	my $connect_cb = sub {
		1182	my $fh = shift
		1183	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1184
		1185	return unless delete $state{connect_guard};
		1186
		1187	# get handle
		1188	$state{handle} = new AnyEvent::Handle
		1189	%{ $arg{handle_params} },
		1190	fh => $fh,
		1191	peername => $uhost,
		1192	tls_ctx => $arg{tls_ctx},
		1193	;
		1194
		1195	$prepare_handle->();
		1196
		1197	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1198
		1199	# now handle proxy-CONNECT method
		1200	if ($proxy && $uscheme eq "https") {
		1201	# oh dear, we have to wrap it into a connect request
		1202
		1203	my $auth = exists $hdr{"proxy-authorization"}
		1204	? "proxy-authorization: " . (delete $hdr{"proxy-authorization"}) . "\015\012"
		1205	: "";
		1206
		1207	# maybe re-use $uauthority with patched port?
		1208	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012$auth\015\012");
		1209	$state{handle}->push_read (line => $qr_nlnl, sub {
		1210	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1211	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1212
		1213	if ($2 == 200) {
		1214	$rpath = $upath;
		1215	$handle_actual_request->();
		1216	} else {
		1217	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1218	}
		1219	});
		1220	} else {
		1221	delete $hdr{"proxy-authorization"} unless $proxy;
		1222
		1223	$handle_actual_request->();
		1224	}
		1225	};
464		1226
465	_get_slot $uhost, sub {	1227	_get_slot $uhost, sub {
466	$state{slot_guard} = shift;	1228	$state{slot_guard} = shift;
467		1229
468	return unless $state{connect_guard};	1230	return unless $state{connect_guard};
469		1231
		1232	# try to use an existing keepalive connection, but only if we, ourselves, plan
		1233	# on a keepalive request (in theory, this should be a separate config option).
		1234	if ($persistent && $KA_CACHE{$ka_key}) {
		1235	$was_persistent = 1;
		1236
		1237	$state{handle} = ka_fetch $ka_key;
		1238	# $state{handle}->destroyed
		1239	# and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
		1240	$prepare_handle->();
		1241	# $state{handle}->destroyed
		1242	# and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
		1243	$handle_actual_request->();
		1244
		1245	} else {
470	my $tcp_connect = $arg{tcp_connect}	1246	my $tcp_connect = $arg{tcp_connect}
471	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1247	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
472		1248
473	$state{connect_guard} = $tcp_connect->(	1249	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });
474	$rhost,
475	$rport,
476	sub {
477	$state{fh} = shift
478	or do {
479	my $err = "$!";
480	%state = ();
481	return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
482	};
483
484	pop; # free memory, save a tree
485
486	return unless delete $state{connect_guard};
487
488	# get handle
489	$state{handle} = new AnyEvent::Handle
490	fh => $state{fh},
491	peername => $rhost,
492	tls_ctx => $arg{tls_ctx},
493	# these need to be reconfigured on keepalive handles
494	timeout => $timeout,
495	on_error => sub {
496	%state = ();
497	$cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
498	},
499	on_eof => sub {
500	%state = ();
501	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
502	},
503	;
504
505	# limit the number of persistent connections
506	# keepalive not yet supported
507	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
508	# ++$KA_COUNT{$_[1]};
509	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
510	# --$KA_COUNT{$_[1]}
511	# };
512	# $hdr{connection} = "keep-alive";
513	# } else {
514	delete $hdr{connection};
515	# }
516
517	$state{handle}->starttls ("connect") if $rscheme eq "https";
518
519	# handle actual, non-tunneled, request
520	my $handle_actual_request = sub {
521	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
522
523	# send request
524	$state{handle}->push_write (
525	"$method $rpath HTTP/1.0\015\012"
526	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
527	. "\015\012"
528	. (delete $arg{body})
529	);
530
531	# return if error occured during push_write()
532	return unless %state;
533
534	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
535
536	# status line and headers
537	$state{handle}->push_read (line => $qr_nlnl, sub {
538	for ("$_[1]") {
539	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
540
541	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc
542	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response", @pseudo }));
543
544	push @pseudo,
545	HTTPVersion => $1,
546	Status => $2,
547	Reason => $3,
548	;
549
550	# things seen, not parsed:
551	# p3pP="NON CUR OTPi OUR NOR UNI"
552
553	$hdr{lc $1} .= ",$2"
554	while /\G
555	([^:\000-\037]*):
556	[\011\040]*
557	((?: [^\012]+ | \012[\011\040] )*)
558	\012
559	/gxc;
560
561	/\G$/
562	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", @pseudo }));
563	}
564
565	# remove the "," prefix we added to all headers above
566	substr $_, 0, 1, ""
567	for values %hdr;
568
569	# patch in all pseudo headers
570	%hdr = (%hdr, @pseudo);
571
572	# redirect handling
573	# microsoft and other shitheads don't give a shit for following standards,
574	# try to support some common forms of broken Location headers.
575	if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
576	$hdr{location} =~ s/^\.\/+//;
577
578	my $url = "$rscheme://$uhost:$uport";
579
580	unless ($hdr{location} =~ s/^\///) {
581	$url .= $upath;
582	$url =~ s/\/[^\/]*$//;
583	}
584
585	$hdr{location} = "$url/$hdr{location}";
586	}
587
588	my $redirect;
589
590	if ($recurse) {
591	my $status = $hdr{Status};
592
593	# industry standard is to redirect POST as GET for
594	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
595	# also, the UA should ask the user for 301 and 307 and POST,
596	# industry standard seems to be to simply follow.
597	# we go with the industry standard.
598	if ($status == 301 or $status == 302 or $status == 303) {
599	# HTTP/1.1 is unclear on how to mutate the method
600	$method = "GET" unless $method eq "HEAD";
601	$redirect = 1;
602	} elsif ($status == 307) {
603	$redirect = 1;
604	}
605	}
606
607	my $finish = sub {
608	$state{handle}->destroy if $state{handle};
609	%state = ();
610
611	# set-cookie processing
612	if ($arg{cookie_jar}) {
613	for ($_[1]{"set-cookie"}) {
614	# parse NAME=VALUE
615	my @kv;
616
617	while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
618	my $name = $1;
619	my $value = $3;
620
621	unless ($value) {
622	$value = $2;
623	$value =~ s/\\(.)/$1/gs;
624	}
625
626	push @kv, $name => $value;
627
628	last unless /\G\s*;/gc;
629	}
630
631	last unless @kv;
632
633	my $name = shift @kv;
634	my %kv = (value => shift @kv, @kv);
635
636	my $cdom;
637	my $cpath = (delete $kv{path}) || "/";
638
639	if (exists $kv{domain}) {
640	$cdom = delete $kv{domain};
641		1250	}
642	$cdom =~ s/^\.?/./; # make sure it starts with a "."
643
644	next if $cdom =~ /\.$/;
645
646	# this is not rfc-like and not netscape-like. go figure.
647	my $ndots = $cdom =~ y/.//;
648	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
649	} else {
650	$cdom = $uhost;
651	}
652
653	# store it
654	$arg{cookie_jar}{version} = 1;
655	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
656
657	redo if /\G\s*,/gc;
658	}
659	}
660
661	if ($redirect && exists $hdr{location}) {
662	# we ignore any errors, as it is very common to receive
663	# Content-Length != 0 but no actual body
664	# we also access %hdr, as $_[1] might be an erro
665	http_request (
666	$method => $hdr{location},
667	%arg,
668	recurse => $recurse - 1,
669	Redirect => \@_,
670	$cb);
671	} else {
672	$cb->($_[0], $_[1]);
673	}
674	};
675
676	my $len = $hdr{"content-length"};
677
678	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
679	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
680	} elsif (
681	$hdr{Status} =~ /^(?:1..|[23]04)$/
682	or $method eq "HEAD"
683	or (defined $len && !$len)
684	) {
685	# no body
686	$finish->("", \%hdr);
687	} else {
688	# body handling, four different code paths
689	# for want_body_handle, on_body (2x), normal (2x)
690	# we might read too much here, but it does not matter yet (no pers. connections)
691	if (!$redirect && $arg{want_body_handle}) {
692	$_[0]->on_eof (undef);
693	$_[0]->on_error (undef);
694	$_[0]->on_read (undef);
695
696	$finish->(delete $state{handle}, \%hdr);
697
698	} elsif ($arg{on_body}) {
699	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
700	if ($len) {
701	$_[0]->on_eof (undef);
702	$_[0]->on_read (sub {
703	$len -= length $_[0]{rbuf};
704
705	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
706	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
707
708	$len > 0
709	or $finish->("", \%hdr);
710	});
711	} else {
712	$_[0]->on_eof (sub {
713	$finish->("", \%hdr);
714	});
715	$_[0]->on_read (sub {
716	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
717	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
718	});
719	}
720	} else {
721	$_[0]->on_eof (undef);
722
723	if ($len) {
724	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
725	$_[0]->on_read (sub {
726	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
727	if $len <= length $_[0]{rbuf};
728	});
729	} else {
730	$_[0]->on_error (sub {
731	($! == Errno::EPIPE || !$!)
732	? $finish->(delete $_[0]{rbuf}, \%hdr)
733	: $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
734	});
735	$_[0]->on_read (sub { });
736	}
737	}
738	}
739	});
740	};
741
742	# now handle proxy-CONNECT method
743	if ($proxy && $uscheme eq "https") {
744	# oh dear, we have to wrap it into a connect request
745
746	# maybe re-use $uauthority with patched port?
747	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
748	$state{handle}->push_read (line => $qr_nlnl, sub {
749	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
750	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", @pseudo }));
751
752	if ($2 == 200) {
753	$rpath = $upath;
754	&$handle_actual_request;
755	} else {
756	%state = ();
757	$cb->(undef, { Status => $2, Reason => $3, @pseudo });
758	}
759	});
760	} else {
761	&$handle_actual_request;
762	}
763
764	},
765	$arg{on_prepare} || sub { $timeout }
766	);
767	};	1251	};
768		1252
769	defined wantarray && AnyEvent::Util::guard { %state = () }	1253	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
770	}	1254	}
771		1255
772	sub http_get($@) {	1256	sub http_get($@) {
773	unshift @_, "GET";	1257	unshift @_, "GET";
774	&http_request	1258	&http_request
…		…
792	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1276	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
793	the actual connection, which in turn uses AnyEvent::DNS to resolve	1277	the actual connection, which in turn uses AnyEvent::DNS to resolve
794	hostnames. The latter is a simple stub resolver and does no caching	1278	hostnames. The latter is a simple stub resolver and does no caching
795	on its own. If you want DNS caching, you currently have to provide	1279	on its own. If you want DNS caching, you currently have to provide
796	your own default resolver (by storing a suitable resolver object in	1280	your own default resolver (by storing a suitable resolver object in
797	C<$AnyEvent::DNS::RESOLVER>).	1281	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
798		1282
799	=head2 GLOBAL FUNCTIONS AND VARIABLES	1283	=head2 GLOBAL FUNCTIONS AND VARIABLES
800		1284
801	=over 4	1285	=over 4
802		1286
803	=item AnyEvent::HTTP::set_proxy "proxy-url"	1287	=item AnyEvent::HTTP::set_proxy "proxy-url"
804		1288
805	Sets the default proxy server to use. The proxy-url must begin with a	1289	Sets the default proxy server to use. The proxy-url must begin with a
806	string of the form C<http://host:port> (optionally C<https:...>), croaks	1290	string of the form C<http://host:port>, croaks otherwise.
807	otherwise.
808		1291
809	To clear an already-set proxy, use C<undef>.	1292	To clear an already-set proxy, use C<undef>.
		1293
		1294	When AnyEvent::HTTP is loaded for the first time it will query the
		1295	default proxy from the operating system, currently by looking at
		1296	C<$ENV{http_proxy>}.
		1297
		1298	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
		1299
		1300	Remove all cookies from the cookie jar that have been expired. If
		1301	C<$session_end> is given and true, then additionally remove all session
		1302	cookies.
		1303
		1304	You should call this function (with a true C<$session_end>) before you
		1305	save cookies to disk, and you should call this function after loading them
		1306	again. If you have a long-running program you can additionally call this
		1307	function from time to time.
		1308
		1309	A cookie jar is initially an empty hash-reference that is managed by this
		1310	module. Its format is subject to change, but currently it is as follows:
		1311
		1312	The key C<version> has to contain C<2>, otherwise the hash gets
		1313	cleared. All other keys are hostnames or IP addresses pointing to
		1314	hash-references. The key for these inner hash references is the
		1315	server path for which this cookie is meant, and the values are again
		1316	hash-references. Each key of those hash-references is a cookie name, and
		1317	the value, you guessed it, is another hash-reference, this time with the
		1318	key-value pairs from the cookie, except for C<expires> and C<max-age>,
		1319	which have been replaced by a C<_expires> key that contains the cookie
		1320	expiry timestamp. Session cookies are indicated by not having an
		1321	C<_expires> key.
		1322
		1323	Here is an example of a cookie jar with a single cookie, so you have a
		1324	chance of understanding the above paragraph:
		1325
		1326	{
		1327	version => 2,
		1328	"10.0.0.1" => {
		1329	"/" => {
		1330	"mythweb_id" => {
		1331	_expires => 1293917923,
		1332	value => "ooRung9dThee3ooyXooM1Ohm",
		1333	},
		1334	},
		1335	},
		1336	}
810		1337
811	=item $date = AnyEvent::HTTP::format_date $timestamp	1338	=item $date = AnyEvent::HTTP::format_date $timestamp
812		1339
813	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP	1340	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
814	Date (RFC 2616).	1341	Date (RFC 2616).
815		1342
816	=item $timestamp = AnyEvent::HTTP::parse_date $date	1343	=item $timestamp = AnyEvent::HTTP::parse_date $date
817		1344
818	Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX	1345	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
		1346	bunch of minor variations of those, and returns the corresponding POSIX
819	timestamp, or C<undef> if the date cannot be parsed.	1347	timestamp, or C<undef> if the date cannot be parsed.
820		1348
821	=item $AnyEvent::HTTP::MAX_RECURSE	1349	=item $AnyEvent::HTTP::MAX_RECURSE
822		1350
823	The default value for the C<recurse> request parameter (default: C<10>).	1351	The default value for the C<recurse> request parameter (default: C<10>).
		1352
		1353	=item $AnyEvent::HTTP::TIMEOUT
		1354
		1355	The default timeout for connection operations (default: C<300>).
824		1356
825	=item $AnyEvent::HTTP::USERAGENT	1357	=item $AnyEvent::HTTP::USERAGENT
826		1358
827	The default value for the C<User-Agent> header (the default is	1359	The default value for the C<User-Agent> header (the default is
828	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1360	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
829		1361
830	=item $AnyEvent::HTTP::MAX_PER_HOST	1362	=item $AnyEvent::HTTP::MAX_PER_HOST
831		1363
832	The maximum number of concurrent connections to the same host (identified	1364	The maximum number of concurrent connections to the same host (identified
833	by the hostname). If the limit is exceeded, then the additional requests	1365	by the hostname). If the limit is exceeded, then additional requests
834	are queued until previous connections are closed.	1366	are queued until previous connections are closed. Both persistent and
		1367	non-persistent connections are counted in this limit.
835		1368
836	The default value for this is C<4>, and it is highly advisable to not	1369	The default value for this is C<4>, and it is highly advisable to not
837	increase it.	1370	increase it much.
		1371
		1372	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1373	connections, older browsers used 2, newer ones (such as firefox 3)
		1374	typically use 6, and Opera uses 8 because like, they have the fastest
		1375	browser and give a shit for everybody else on the planet.
		1376
		1377	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1378
		1379	The time after which idle persistent connections get closed by
		1380	AnyEvent::HTTP (default: C<3>).
838		1381
839	=item $AnyEvent::HTTP::ACTIVE	1382	=item $AnyEvent::HTTP::ACTIVE
840		1383
841	The number of active connections. This is not the number of currently	1384	The number of active connections. This is not the number of currently
842	running requests, but the number of currently open and non-idle TCP	1385	running requests, but the number of currently open and non-idle TCP
843	connections. This number of can be useful for load-leveling.	1386	connections. This number can be useful for load-leveling.
844		1387
845	=back	1388	=back
846		1389
847	=cut	1390	=cut
848		1391
…		…
863	sub parse_date($) {	1406	sub parse_date($) {
864	my ($date) = @_;	1407	my ($date) = @_;
865		1408
866	my ($d, $m, $y, $H, $M, $S);	1409	my ($d, $m, $y, $H, $M, $S);
867		1410
868	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$/) {	1411	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$/) {
869	# RFC 822/1123, required by RFC 2616	1412	# RFC 822/1123, required by RFC 2616 (with " ")
		1413	# cookie dates (with "-")
		1414
870	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);	1415	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
871		1416
872	} 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$/) {	1417	} 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$/) {
873	# RFC 850	1418	# RFC 850
874	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);	1419	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
875		1420
876	} 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])$/) {	1421	} 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])$/) {
877	# ISO C's asctime	1422	# ISO C's asctime
878	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);	1423	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
879	}	1424	}
880	# other formats fail in the loop below	1425	# other formats fail in the loop below
881		1426
882	for (0..11) {	1427	for (0..11) {
883	if ($m eq $month[$_]) {	1428	if ($m eq $month[$_]) {
884	require Time::Local;	1429	require Time::Local;
885	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1430	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
886	}	1431	}
887	}	1432	}
888		1433
889	undef	1434	undef
890	}	1435	}
891		1436
892	sub set_proxy($) {	1437	sub set_proxy($) {
893	if (length $_[0]) {	1438	if (length $_[0]) {
894	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1439	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
895	or Carp::croak "$_[0]: invalid proxy URL";	1440	or Carp::croak "$_[0]: invalid proxy URL";
896	$PROXY = [$2, $3 || 3128, $1]	1441	$PROXY = [$2, $3 || 3128, $1]
897	} else {	1442	} else {
898	undef $PROXY;	1443	undef $PROXY;
899	}	1444	}
…		…
902	# initialise proxy from environment	1447	# initialise proxy from environment
903	eval {	1448	eval {
904	set_proxy $ENV{http_proxy};	1449	set_proxy $ENV{http_proxy};
905	};	1450	};
906		1451
		1452	=head2 SHOWCASE
		1453
		1454	This section contains some more elaborate "real-world" examples or code
		1455	snippets.
		1456
		1457	=head2 HTTP/1.1 FILE DOWNLOAD
		1458
		1459	Downloading files with HTTP can be quite tricky, especially when something
		1460	goes wrong and you want to resume.
		1461
		1462	Here is a function that initiates and resumes a download. It uses the
		1463	last modified time to check for file content changes, and works with many
		1464	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1465	on older servers.
		1466
		1467	It calls the completion callback with either C<undef>, which means a
		1468	nonretryable error occurred, C<0> when the download was partial and should
		1469	be retried, and C<1> if it was successful.
		1470
		1471	use AnyEvent::HTTP;
		1472
		1473	sub download($$$) {
		1474	my ($url, $file, $cb) = @_;
		1475
		1476	open my $fh, "+<", $file
		1477	or die "$file: $!";
		1478
		1479	my %hdr;
		1480	my $ofs = 0;
		1481
		1482	if (stat $fh and -s _) {
		1483	$ofs = -s _;
		1484	warn "-s is ", $ofs;
		1485	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1486	$hdr{"range"} = "bytes=$ofs-";
		1487	}
		1488
		1489	http_get $url,
		1490	headers => \%hdr,
		1491	on_header => sub {
		1492	my ($hdr) = @_;
		1493
		1494	if ($hdr->{Status} == 200 && $ofs) {
		1495	# resume failed
		1496	truncate $fh, $ofs = 0;
		1497	}
		1498
		1499	sysseek $fh, $ofs, 0;
		1500
		1501	1
		1502	},
		1503	on_body => sub {
		1504	my ($data, $hdr) = @_;
		1505
		1506	if ($hdr->{Status} =~ /^2/) {
		1507	length $data == syswrite $fh, $data
		1508	or return; # abort on write errors
		1509	}
		1510
		1511	1
		1512	},
		1513	sub {
		1514	my (undef, $hdr) = @_;
		1515
		1516	my $status = $hdr->{Status};
		1517
		1518	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1519	utime $time, $time, $fh;
		1520	}
		1521
		1522	if ($status == 200 || $status == 206 || $status == 416) {
		1523	# download ok || resume ok || file already fully downloaded
		1524	$cb->(1, $hdr);
		1525
		1526	} elsif ($status == 412) {
		1527	# file has changed while resuming, delete and retry
		1528	unlink $file;
		1529	$cb->(0, $hdr);
		1530
		1531	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1532	# retry later
		1533	$cb->(0, $hdr);
		1534
		1535	} else {
		1536	$cb->(undef, $hdr);
		1537	}
		1538	}
		1539	;
		1540	}
		1541
		1542	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1543	if ($_[0]) {
		1544	print "OK!\n";
		1545	} elsif (defined $_[0]) {
		1546	print "please retry later\n";
		1547	} else {
		1548	print "ERROR\n";
		1549	}
		1550	};
		1551
907	=head2 SOCKS PROXIES	1552	=head3 SOCKS PROXIES
908		1553
909	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1554	Socks proxies are not directly supported by AnyEvent::HTTP. You can
910	compile your perl to support socks, or use an external program such as	1555	compile your perl to support socks, or use an external program such as
911	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy	1556	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
912	transparently.	1557	transparently.

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