[ViewVC] Diff of: cvs/AnyEvent-HTTP/HTTP.pm

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.43 by root, Mon Jul 6 03:03:12 2009 UTC vs.
Revision 1.124 by root, Fri May 8 21:26:16 2015 UTC

…		…
15	This module is an L<AnyEvent> user, you need to make sure that you use and	15	This module is an L<AnyEvent> user, you need to make sure that you use and
16	run a supported event loop.	16	run a supported event loop.
17		17
18	This module implements a simple, stateless and non-blocking HTTP	18	This module implements a simple, stateless and non-blocking HTTP
19	client. It supports GET, POST and other request methods, cookies and more,	19	client. It supports GET, POST and other request methods, cookies and more,
20	all on a very low level. It can follow redirects supports proxies and	20	all on a very low level. It can follow redirects, supports proxies, and
21	automatically limits the number of connections to the values specified in	21	automatically limits the number of connections to the values specified in
22	the RFC.	22	the RFC.
23		23
24	It should generally be a "good client" that is enough for most HTTP	24	It should generally be a "good client" that is enough for most HTTP
25	tasks. Simple tasks should be simple, but complex tasks should still be	25	tasks. Simple tasks should be simple, but complex tasks should still be
…		…
36		36
37	=cut	37	=cut
38		38
39	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
40		40
41	use strict;	41	use common::sense;
42	no warnings;
43		42
44	use Errno ();	43	use Errno ();
45		44
46	use AnyEvent 4.452 ();	45	use AnyEvent 5.0 ();
47	use AnyEvent::Util ();	46	use AnyEvent::Util ();
48	use AnyEvent::Socket ();
49	use AnyEvent::Handle ();	47	use AnyEvent::Handle ();
50		48
51	use base Exporter::;	49	use base Exporter::;
52		50
53	our $VERSION = '1.12';	51	our $VERSION = 2.21;
54		52
55	our @EXPORT = qw(http_get http_post http_head http_request);	53	our @EXPORT = qw(http_get http_post http_head http_request);
56		54
57	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)";
58	our $MAX_RECURSE = 10;	56	our $MAX_RECURSE = 10;
59	our $MAX_PERSISTENT = 8;
60	our $PERSISTENT_TIMEOUT = 2;	57	our $PERSISTENT_TIMEOUT = 3;
61	our $TIMEOUT = 300;	58	our $TIMEOUT = 300;
62		59	our $MAX_PER_HOST = 4; # changing this is evil
63	# changing these is evil
64	our $MAX_PERSISTENT_PER_HOST = 0;
65	our $MAX_PER_HOST = 4;
66		60
67	our $PROXY;	61	our $PROXY;
68	our $ACTIVE = 0;	62	our $ACTIVE = 0;
69		63
70	my %KA_COUNT; # number of open keep-alive connections per host	64	my %KA_CACHE; # indexed by uhost currently, points to [$handle...] array
71	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
72		66
73	=item http_get $url, key => value..., $cb->($data, $headers)	67	=item http_get $url, key => value..., $cb->($data, $headers)
74		68
75	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
…		…
92	must be an absolute http or https URL.	86	must be an absolute http or https URL.
93		87
94	When called in void context, nothing is returned. In other contexts,	88	When called in void context, nothing is returned. In other contexts,
95	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
96	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
97	destroyed before the callbakc is called, the request will be cancelled.	91	destroyed before the callback is called, the request will be cancelled.
98		92
99	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
100	(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
101	second argument.	95	(and trailers) as second argument.
102		96
103	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
104	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>	98	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
		99	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
105	contain the three parts of the HTTP Status-Line of the same name. The	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>.
		104
106	pseudo-header C<URL> contains the original URL (which can differ from the	105	The pseudo-header C<URL> contains the actual URL (which can differ from
107	requested URL when following redirects).	106	the requested URL when following redirects - for example, you might get
		107	an error that your URL scheme is not supported even though your URL is a
		108	valid http URL because it redirected to an ftp URL, in which case you can
		109	look at the URL pseudo header).
		110
		111	The pseudo-header C<Redirect> only exists when the request was a result
		112	of an internal redirect. In that case it is an array reference with
		113	the C<($data, $headers)> from the redirect response. Note that this
		114	response could in turn be the result of a redirect itself, and C<<
		115	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		116	response, and so on.
108		117
109	If the server sends a header multiple times, then their contents will be	118	If the server sends a header multiple times, then their contents will be
110	joined together with a comma (C<,>), as per the HTTP spec.	119	joined together with a comma (C<,>), as per the HTTP spec.
111		120
112	If an internal error occurs, such as not being able to resolve a hostname,	121	If an internal error occurs, such as not being able to resolve a hostname,
113	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>	122	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be
114	(usually C<599>) and the C<Reason> pseudo-header will contain an error	123	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
115	message.	124	message. Currently the following status codes are used:
		125
		126	=over 4
		127
		128	=item 595 - errors during connection establishment, proxy handshake.
		129
		130	=item 596 - errors during TLS negotiation, request sending and header processing.
		131
		132	=item 597 - errors during body receiving or processing.
		133
		134	=item 598 - user aborted request via C<on_header> or C<on_body>.
		135
		136	=item 599 - other, usually nonretryable, errors (garbled URL etc.).
		137
		138	=back
116		139
117	A typical callback might look like this:	140	A typical callback might look like this:
118		141
119	sub {	142	sub {
120	my ($body, $hdr) = @_;	143	my ($body, $hdr) = @_;
…		…
131		154
132	=over 4	155	=over 4
133		156
134	=item recurse => $count (default: $MAX_RECURSE)	157	=item recurse => $count (default: $MAX_RECURSE)
135		158
136	Whether to recurse requests or not, e.g. on redirects, authentication	159	Whether to recurse requests or not, e.g. on redirects, authentication and
137	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.
138		166
139	=item headers => hashref	167	=item headers => hashref
140		168
141	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
142	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
143	and will provide defaults for C<User-Agent:> and C<Referer:>.	171	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>
		172	(this can be suppressed by using C<undef> for these headers in which case
		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.
144		181
145	=item timeout => $seconds	182	=item timeout => $seconds
146		183
147	The time-out to use for various stages - each connect attempt will reset	184	The time-out to use for various stages - each connect attempt will reset
148	the timeout, as will read or write activity. Default timeout is 5 minutes.	185	the timeout, as will read or write activity, i.e. this is not an overall
		186	timeout.
		187
		188	Default timeout is 5 minutes.
149		189
150	=item proxy => [$host, $port[, $scheme]] or undef	190	=item proxy => [$host, $port[, $scheme]] or undef
151		191
152	Use the given http proxy for all requests. If not specified, then the	192	Use the given http proxy for all requests, or no proxy if C<undef> is
153	default proxy (as specified by C<$ENV{http_proxy}>) is used.	193	used.
154		194
155	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	195	C<$scheme> must be either missing or must be C<http> for HTTP.
156	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.
157		202
158	=item body => $string	203	=item body => $string
159		204
160	The request body, usually empty. Will be-sent as-is (future versions of	205	The request body, usually empty. Will be sent as-is (future versions of
161	this module might offer more options).	206	this module might offer more options).
162		207
163	=item cookie_jar => $hash_ref	208	=item cookie_jar => $hash_ref
164		209
165	Passing this parameter enables (simplified) cookie-processing, loosely	210	Passing this parameter enables (simplified) cookie-processing, loosely
166	based on the original netscape specification.	211	based on the original netscape specification.
167		212
168	The C<$hash_ref> must be an (initially empty) hash reference which will	213	The C<$hash_ref> must be an (initially empty) hash reference which
169	get updated automatically. It is possible to save the cookie_jar to	214	will get updated automatically. It is possible to save the cookie jar
170	persistent storage with something like JSON or Storable, but this is not	215	to persistent storage with something like JSON or Storable - see the
171	recommended, as expiry times are currently being ignored.	216	C<AnyEvent::HTTP::cookie_jar_expire> function if you wish to remove
		217	expired or session-only cookies, and also for documentation on the format
		218	of the cookie jar.
172		219
173	Note that this cookie implementation is not of very high quality, nor	220	Note that this cookie implementation is not meant to be complete. If
174	meant to be complete. If you want complete cookie management you have to	221	you want complete cookie management you have to do that on your
175	do that on your own. C<cookie_jar> is meant as a quick fix to get some	222	own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites
176	cookie-using sites working. Cookies are a privacy disaster, do not use	223	working. Cookies are a privacy disaster, do not use them unless required
177	them unless required to.	224	to.
		225
		226	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
		227	headers will be set and handled by this module, otherwise they will be
		228	left untouched.
178		229
179	=item tls_ctx => $scheme \| $tls_ctx	230	=item tls_ctx => $scheme \| $tls_ctx
180		231
181	Specifies the AnyEvent::TLS context to be used for https connections. This	232	Specifies the AnyEvent::TLS context to be used for https connections. This
182	parameter follows the same rules as the C<tls_ctx> parameter to	233	parameter follows the same rules as the C<tls_ctx> parameter to
…		…
186	verification) TLS context.	237	verification) TLS context.
187		238
188	The default for this option is C<low>, which could be interpreted as "give	239	The default for this option is C<low>, which could be interpreted as "give
189	me the page, no matter what".	240	me the page, no matter what".
190		241
		242	See also the C<sessionid> parameter.
		243
		244	=item session => $string
		245
		246	The module might reuse connections to the same host internally. Sometimes
		247	(e.g. when using TLS), you do not want to reuse connections from other
		248	sessions. This can be achieved by setting this parameter to some unique
		249	ID (such as the address of an object storing your state data, or the TLS
		250	context) - only connections using the same unique ID will be reused.
		251
		252	=item on_prepare => $callback->($fh)
		253
		254	In rare cases you need to "tune" the socket before it is used to
		255	connect (for example, to bind it on a given IP address). This parameter
		256	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		257	and behaves exactly the same way (e.g. it has to provide a
		258	timeout). See the description for the C<$prepare_cb> argument of
		259	C<AnyEvent::Socket::tcp_connect> for details.
		260
		261	=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
		262
		263	In even rarer cases you want total control over how AnyEvent::HTTP
		264	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
		265	to do this, but you can provide your own C<tcp_connect> function -
		266	obviously, it has to follow the same calling conventions, except that it
		267	may always return a connection guard object.
		268
		269	There are probably lots of weird uses for this function, starting from
		270	tracing the hosts C<http_request> actually tries to connect, to (inexact
		271	but fast) host => IP address caching or even socks protocol support.
		272
191	=item on_header => $callback->($headers)	273	=item on_header => $callback->($headers)
192		274
193	When specified, this callback will be called with the header hash as soon	275	When specified, this callback will be called with the header hash as soon
194	as headers have been successfully received from the remote server (not on	276	as headers have been successfully received from the remote server (not on
195	locally-generated errors).	277	locally-generated errors).
…		…
200		282
201	This callback is useful, among other things, to quickly reject unwanted	283	This callback is useful, among other things, to quickly reject unwanted
202	content, which, if it is supposed to be rare, can be faster than first	284	content, which, if it is supposed to be rare, can be faster than first
203	doing a C<HEAD> request.	285	doing a C<HEAD> request.
204		286
		287	The downside is that cancelling the request makes it impossible to re-use
		288	the connection. Also, the C<on_header> callback will not receive any
		289	trailer (headers sent after the response body).
		290
205	Example: cancel the request unless the content-type is "text/html".	291	Example: cancel the request unless the content-type is "text/html".
206		292
207	on_header => sub {	293	on_header => sub {
208	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/	294	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
209	},	295	},
…		…
216		302
217	It has to return either true (in which case AnyEvent::HTTP will continue),	303	It has to return either true (in which case AnyEvent::HTTP will continue),
218	or false, in which case AnyEvent::HTTP will cancel the download (and call	304	or false, in which case AnyEvent::HTTP will cancel the download (and call
219	the completion callback with an error code of C<598>).	305	the completion callback with an error code of C<598>).
220		306
		307	The downside to cancelling the request is that it makes it impossible to
		308	re-use the connection.
		309
221	This callback is useful when the data is too large to be held in memory	310	This callback is useful when the data is too large to be held in memory
222	(so the callback writes it to a file) or when only some information should	311	(so the callback writes it to a file) or when only some information should
223	be extracted, or when the body should be processed incrementally.	312	be extracted, or when the body should be processed incrementally.
224		313
225	It is usually preferred over doing your own body handling via	314	It is usually preferred over doing your own body handling via
226	C<want_body_handle>.	315	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		316	only used to create a connection, C<want_body_handle> is the better
		317	alternative, as it allows you to install your own event handler, reducing
		318	resource usage.
227		319
228	=item want_body_handle => $enable	320	=item want_body_handle => $enable
229		321
230	When enabled (default is disabled), the behaviour of AnyEvent::HTTP	322	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
231	changes considerably: after parsing the headers, and instead of	323	changes considerably: after parsing the headers, and instead of
…		…
233	called. Instead of the C<$body> argument containing the body data, the	325	called. Instead of the C<$body> argument containing the body data, the
234	callback will receive the L<AnyEvent::Handle> object associated with the	326	callback will receive the L<AnyEvent::Handle> object associated with the
235	connection. In error cases, C<undef> will be passed. When there is no body	327	connection. In error cases, C<undef> will be passed. When there is no body
236	(e.g. status C<304>), the empty string will be passed.	328	(e.g. status C<304>), the empty string will be passed.
237		329
238	The handle object might or might not be in TLS mode, might be connected to	330	The handle object might or might not be in TLS mode, might be connected
239	a proxy, be a persistent connection etc., and configured in unspecified	331	to a proxy, be a persistent connection, use chunked transfer encoding
240	ways. The user is responsible for this handle (it will not be used by this	332	etc., and configured in unspecified ways. The user is responsible for this
241	module anymore).	333	handle (it will not be used by this module anymore).
242		334
243	This is useful with some push-type services, where, after the initial	335	This is useful with some push-type services, where, after the initial
244	headers, an interactive protocol is used (typical example would be the	336	headers, an interactive protocol is used (typical example would be the
245	push-style twitter API which starts a JSON/XML stream).	337	push-style twitter API which starts a JSON/XML stream).
246		338
247	If you think you need this, first have a look at C<on_body>, to see if	339	If you think you need this, first have a look at C<on_body>, to see if
248	that doesn'T solve your problem in a better way.	340	that doesn't solve your problem in a better way.
		341
		342	=item persistent => $boolean
		343
		344	Try to create/reuse a persistent connection. When this flag is set
		345	(default: true for idempotent requests, false for all others), then
		346	C<http_request> tries to re-use an existing (previously-created)
		347	persistent connection to the host and, failing that, tries to create a new
		348	one.
		349
		350	Requests failing in certain ways will be automatically retried once, which
		351	is dangerous for non-idempotent requests, which is why it defaults to off
		352	for them. The reason for this is because the bozos who designed HTTP/1.1
		353	made it impossible to distinguish between a fatal error and a normal
		354	connection timeout, so you never know whether there was a problem with
		355	your request or not.
		356
		357	When reusing an existent connection, many parameters (such as TLS context)
		358	will be ignored. See the C<session> parameter for a workaround.
		359
		360	=item keepalive => $boolean
		361
		362	Only used when C<persistent> is also true. This parameter decides whether
		363	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		364	(as opposed to only a HTTP/1.1 persistent connection).
		365
		366	The default is true, except when using a proxy, in which case it defaults
		367	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		368
		369	=item handle_params => { key => value ... }
		370
		371	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		372	constructor that is called - not all requests will create a handle, and
		373	sometimes more than one is created, so this parameter is only good for
		374	setting hints.
		375
		376	Example: set the maximum read size to 4096, to potentially conserve memory
		377	at the cost of speed.
		378
		379	handle_params => {
		380	max_read_size => 4096,
		381	},
249		382
250	=back	383	=back
251		384
252	Example: make a simple HTTP GET request for http://www.nethype.de/	385	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		386	the response body.
253		387
254	http_request GET => "http://www.nethype.de/", sub {	388	http_request GET => "http://www.nethype.de/", sub {
255	my ($body, $hdr) = @_;	389	my ($body, $hdr) = @_;
256	print "$body\n";	390	print "$body\n";
257	};	391	};
258		392
259	Example: make a HTTP HEAD request on https://www.google.com/, use a	393	Example: do a HTTP HEAD request on https://www.google.com/, use a
260	timeout of 30 seconds.	394	timeout of 30 seconds.
261		395
262	http_request	396	http_request
263	GET => "https://www.google.com",	397	HEAD => "https://www.google.com",
		398	headers => { "user-agent" => "MySearchClient 1.0" },
264	timeout => 30,	399	timeout => 30,
265	sub {	400	sub {
266	my ($body, $hdr) = @_;	401	my ($body, $hdr) = @_;
267	use Data::Dumper;	402	use Data::Dumper;
268	print Dumper $hdr;	403	print Dumper $hdr;
269	}	404	}
270	;	405	;
271		406
272	Example: make another simple HTTP GET request, but immediately try to	407	Example: do another simple HTTP GET request, but immediately try to
273	cancel it.	408	cancel it.
274		409
275	my $request = http_request GET => "http://www.nethype.de/", sub {	410	my $request = http_request GET => "http://www.nethype.de/", sub {
276	my ($body, $hdr) = @_;	411	my ($body, $hdr) = @_;
277	print "$body\n";	412	print "$body\n";
278	};	413	};
279		414
280	undef $request;	415	undef $request;
281		416
282	=cut	417	=cut
		418
		419	#############################################################################
		420	# wait queue/slots
283		421
284	sub _slot_schedule;	422	sub _slot_schedule;
285	sub _slot_schedule($) {	423	sub _slot_schedule($) {
286	my $host = shift;	424	my $host = shift;
287		425
…		…
309	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	447	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
310		448
311	_slot_schedule $_[0];	449	_slot_schedule $_[0];
312	}	450	}
313		451
314	our $qr_nl = qr<\015?\012>;	452	#############################################################################
315	our $qr_nlnl = qr<\015?\012\015?\012>;	453	# cookie handling
		454
		455	# expire cookies
		456	sub cookie_jar_expire($;$) {
		457	my ($jar, $session_end) = @_;
		458
		459	%$jar = () if $jar->{version} != 1;
		460
		461	my $anow = AE::now;
		462
		463	while (my ($chost, $paths) = each %$jar) {
		464	next unless ref $paths;
		465
		466	while (my ($cpath, $cookies) = each %$paths) {
		467	while (my ($cookie, $kv) = each %$cookies) {
		468	if (exists $kv->{_expires}) {
		469	delete $cookies->{$cookie}
		470	if $anow > $kv->{_expires};
		471	} elsif ($session_end) {
		472	delete $cookies->{$cookie};
		473	}
		474	}
		475
		476	delete $paths->{$cpath}
		477	unless %$cookies;
		478	}
		479
		480	delete $jar->{$chost}
		481	unless %$paths;
		482	}
		483	}
		484
		485	# extract cookies from jar
		486	sub cookie_jar_extract($$$$) {
		487	my ($jar, $scheme, $host, $path) = @_;
		488
		489	%$jar = () if $jar->{version} != 1;
		490
		491	my @cookies;
		492
		493	while (my ($chost, $paths) = each %$jar) {
		494	next unless ref $paths;
		495
		496	if ($chost =~ /^\./) {
		497	next unless $chost eq substr $host, -length $chost;
		498	} elsif ($chost =~ /\./) {
		499	next unless $chost eq $host;
		500	} else {
		501	next;
		502	}
		503
		504	while (my ($cpath, $cookies) = each %$paths) {
		505	next unless $cpath eq substr $path, 0, length $cpath;
		506
		507	while (my ($cookie, $kv) = each %$cookies) {
		508	next if $scheme ne "https" && exists $kv->{secure};
		509
		510	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
		511	delete $cookies->{$cookie};
		512	next;
		513	}
		514
		515	my $value = $kv->{value};
		516
		517	if ($value =~ /[=;,[:space:]]/) {
		518	$value =~ s/([\\"])/\\$1/g;
		519	$value = "\"$value\"";
		520	}
		521
		522	push @cookies, "$cookie=$value";
		523	}
		524	}
		525	}
		526
		527	\@cookies
		528	}
		529
		530	# parse set_cookie header into jar
		531	sub cookie_jar_set_cookie($$$$) {
		532	my ($jar, $set_cookie, $host, $date) = @_;
		533
		534	my $anow = int AE::now;
		535	my $snow; # server-now
		536
		537	for ($set_cookie) {
		538	# parse NAME=VALUE
		539	my @kv;
		540
		541	# expires is not http-compliant in the original cookie-spec,
		542	# we support the official date format and some extensions
		543	while (
		544	m{
		545	\G\s*
		546	(?:
		547	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
		548	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^;,[:space:]]) ) )?
		549	)
		550	}gcxsi
		551	) {
		552	my $name = $2;
		553	my $value = $4;
		554
		555	if (defined $1) {
		556	# expires
		557	$name = "expires";
		558	$value = $1;
		559	} elsif (defined $3) {
		560	# quoted
		561	$value = $3;
		562	$value =~ s/\\(.)/$1/gs;
		563	}
		564
		565	push @kv, @kv ? lc $name : $name, $value;
		566
		567	last unless /\G\s*;/gc;
		568	}
		569
		570	last unless @kv;
		571
		572	my $name = shift @kv;
		573	my %kv = (value => shift @kv, @kv);
		574
		575	if (exists $kv{"max-age"}) {
		576	$kv{_expires} = $anow + delete $kv{"max-age"};
		577	} elsif (exists $kv{expires}) {
		578	$snow \|\|= parse_date ($date) \|\| $anow;
		579	$kv{_expires} = $anow + (parse_date (delete $kv{expires}) - $snow);
		580	} else {
		581	delete $kv{_expires};
		582	}
		583
		584	my $cdom;
		585	my $cpath = (delete $kv{path}) \|\| "/";
		586
		587	if (exists $kv{domain}) {
		588	$cdom = delete $kv{domain};
		589
		590	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		591
		592	next if $cdom =~ /\.$/;
		593
		594	# this is not rfc-like and not netscape-like. go figure.
		595	my $ndots = $cdom =~ y/.//;
		596	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		597	} else {
		598	$cdom = $host;
		599	}
		600
		601	# store it
		602	$jar->{version} = 1;
		603	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
		604
		605	redo if /\G\s*,/gc;
		606	}
		607	}
		608
		609	#############################################################################
		610	# keepalive/persistent connection cache
		611
		612	# fetch a connection from the keepalive cache
		613	sub ka_fetch($) {
		614	my $ka_key = shift;
		615
		616	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		617	delete $KA_CACHE{$ka_key}
		618	unless @{ $KA_CACHE{$ka_key} };
		619
		620	$hdl
		621	}
		622
		623	sub ka_store($$) {
		624	my ($ka_key, $hdl) = @_;
		625
		626	my $kaa = $KA_CACHE{$ka_key} \|\|= [];
		627
		628	my $destroy = sub {
		629	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		630
		631	$hdl->destroy;
		632
		633	@ka
		634	? $KA_CACHE{$ka_key} = \@ka
		635	: delete $KA_CACHE{$ka_key};
		636	};
		637
		638	# on error etc., destroy
		639	$hdl->on_error ($destroy);
		640	$hdl->on_eof ($destroy);
		641	$hdl->on_read ($destroy);
		642	$hdl->timeout ($PERSISTENT_TIMEOUT);
		643
		644	push @$kaa, $hdl;
		645	shift @$kaa while @$kaa > $MAX_PER_HOST;
		646	}
		647
		648	#############################################################################
		649	# utilities
		650
		651	# continue to parse $_ for headers and place them into the arg
		652	sub _parse_hdr() {
		653	my %hdr;
		654
		655	# things seen, not parsed:
		656	# p3pP="NON CUR OTPi OUR NOR UNI"
		657
		658	$hdr{lc $1} .= ",$2"
		659	while /\G
		660	([^:\000-\037]*):
		661	[\011\040]*
		662	((?: [^\012]+ \| \012[\011\040] )*)
		663	\012
		664	/gxc;
		665
		666	/\G$/
		667	or return;
		668
		669	# remove the "," prefix we added to all headers above
		670	substr $_, 0, 1, ""
		671	for values %hdr;
		672
		673	\%hdr
		674	}
		675
		676	#############################################################################
		677	# http_get
		678
		679	our $qr_nlnl = qr{(?<![^\012])\015?\012};
316		680
317	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	681	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
318	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	682	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		683
		684	# maybe it should just become a normal object :/
		685
		686	sub _destroy_state(\%) {
		687	my ($state) = @_;
		688
		689	$state->{handle}->destroy if $state->{handle};
		690	%$state = ();
		691	}
		692
		693	sub _error(\%$$) {
		694	my ($state, $cb, $hdr) = @_;
		695
		696	&_destroy_state ($state);
		697
		698	$cb->(undef, $hdr);
		699	()
		700	}
		701
		702	our %IDEMPOTENT = (
		703	DELETE => 1,
		704	GET => 1,
		705	HEAD => 1,
		706	OPTIONS => 1,
		707	PUT => 1,
		708	TRACE => 1,
		709
		710	ACL => 1,
		711	"BASELINE-CONTROL" => 1,
		712	BIND => 1,
		713	CHECKIN => 1,
		714	CHECKOUT => 1,
		715	COPY => 1,
		716	LABEL => 1,
		717	LINK => 1,
		718	MERGE => 1,
		719	MKACTIVITY => 1,
		720	MKCALENDAR => 1,
		721	MKCOL => 1,
		722	MKREDIRECTREF => 1,
		723	MKWORKSPACE => 1,
		724	MOVE => 1,
		725	ORDERPATCH => 1,
		726	PROPFIND => 1,
		727	PROPPATCH => 1,
		728	REBIND => 1,
		729	REPORT => 1,
		730	SEARCH => 1,
		731	UNBIND => 1,
		732	UNCHECKOUT => 1,
		733	UNLINK => 1,
		734	UNLOCK => 1,
		735	UPDATE => 1,
		736	UPDATEREDIRECTREF => 1,
		737	"VERSION-CONTROL" => 1,
		738	);
319		739
320	sub http_request($$@) {	740	sub http_request($$@) {
321	my $cb = pop;	741	my $cb = pop;
322	my ($method, $url, %arg) = @_;	742	my ($method, $url, %arg) = @_;
323		743
…		…
332	while (my ($k, $v) = each %$hdr) {	752	while (my ($k, $v) = each %$hdr) {
333	$hdr{lc $k} = $v;	753	$hdr{lc $k} = $v;
334	}	754	}
335	}	755	}
336		756
		757	# pseudo headers for all subsequent responses
		758	my @pseudo = (URL => $url);
		759	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		760
337	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	761	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
338		762
339	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })	763	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
340	if $recurse < 0;	764	if $recurse < 0;
341		765
342	my $proxy = $arg{proxy} \|\| $PROXY;	766	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
343	my $timeout = $arg{timeout} \|\| $TIMEOUT;	767	my $timeout = $arg{timeout} \|\| $TIMEOUT;
344		768
345	my ($uscheme, $uauthority, $upath, $query, $fragment) =	769	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
346	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	770	$url =~ m\|^([^:]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
347		771
348	$uscheme = lc $uscheme;	772	$uscheme = lc $uscheme;
349		773
350	my $uport = $uscheme eq "http" ? 80	774	my $uport = $uscheme eq "http" ? 80
351	: $uscheme eq "https" ? 443	775	: $uscheme eq "https" ? 443
352	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });	776	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
353		777
354	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	778	$uauthority =~ /^(?: .*\@ )? ([^\@]+?) (?: : (\d+) )?$/x
355	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });	779	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
356		780
357	my $uhost = $1;	781	my $uhost = lc $1;
358	$uport = $2 if defined $2;	782	$uport = $2 if defined $2;
359		783
360	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";	784	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		785	unless exists $hdr{host};
361		786
362	$uhost =~ s/^\[(.*)\]$/$1/;	787	$uhost =~ s/^\[(.*)\]$/$1/;
363	$upath .= "?$query" if length $query;	788	$upath .= $query if length $query;
364		789
365	$upath =~ s%^/?%/%;	790	$upath =~ s%^/?%/%;
366		791
367	# cookie processing	792	# cookie processing
368	if (my $jar = $arg{cookie_jar}) {	793	if (my $jar = $arg{cookie_jar}) {
369	%$jar = () if $jar->{version} != 1;	794	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
370		795
371	my @cookie;
372
373	while (my ($chost, $v) = each %$jar) {
374	if ($chost =~ /^\./) {
375	next unless $chost eq substr $uhost, -length $chost;
376	} elsif ($chost =~ /\./) {
377	next unless $chost eq $uhost;
378	} else {
379	next;
380	}
381
382	while (my ($cpath, $v) = each %$v) {
383	next unless $cpath eq substr $upath, 0, length $cpath;
384
385	while (my ($k, $v) = each %$v) {
386	next if $uscheme ne "https" && exists $v->{secure};
387	my $value = $v->{value};
388	$value =~ s/([\\"])/\\$1/g;
389	push @cookie, "$k=\"$value\"";
390	}
391	}
392	}
393
394	$hdr{cookie} = join "; ", @cookie	796	$hdr{cookie} = join "; ", @$cookies
395	if @cookie;	797	if @$cookies;
396	}	798	}
397		799
398	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path	800	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
399		801
400	if ($proxy) {	802	if ($proxy) {
401	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);	803	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
		804
		805	$rscheme = "http" unless defined $rscheme;
402		806
403	# don't support https requests over https-proxy transport,	807	# don't support https requests over https-proxy transport,
404	# can't be done with tls as spec'ed, unless you double-encrypt.	808	# can't be done with tls as spec'ed, unless you double-encrypt.
405	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	809	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		810
		811	$rhost = lc $rhost;
		812	$rscheme = lc $rscheme;
406	} else {	813	} else {
407	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	814	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
408	}	815	}
409		816
410	$hdr{"user-agent"} \|\|= $USERAGENT;	817	# leave out fragment and query string, just a heuristic
411	$hdr{referer} \|\|= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic	818	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		819	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
412		820
413	$hdr{"content-length"} = length $arg{body};	821	$hdr{"content-length"} = length $arg{body}
		822	if length $arg{body} \|\| $method ne "GET";
		823
		824	my $idempotent = $IDEMPOTENT{$method};
		825
		826	# default value for keepalive is true iff the request is for an idempotent method
		827	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
		828	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
		829	my $was_persistent; # true if this is actually a recycled connection
		830
		831	# the key to use in the keepalive cache
		832	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		833
		834	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
		835	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
414		836
415	my %state = (connect_guard => 1);	837	my %state = (connect_guard => 1);
		838
		839	my $ae_error = 595; # connecting
		840
		841	# handle actual, non-tunneled, request
		842	my $handle_actual_request = sub {
		843	$ae_error = 596; # request phase
		844
		845	my $hdl = $state{handle};
		846
		847	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
		848
		849	# send request
		850	$hdl->push_write (
		851	"$method $rpath HTTP/1.1\015\012"
		852	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		853	. "\015\012"
		854	. $arg{body}
		855	);
		856
		857	# return if error occurred during push_write()
		858	return unless %state;
		859
		860	# reduce memory usage, save a kitten, also re-use it for the response headers.
		861	%hdr = ();
		862
		863	# status line and headers
		864	$state{read_response} = sub {
		865	return unless %state;
		866
		867	for ("$_[1]") {
		868	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		869
		870	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
		871	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
		872
		873	# 100 Continue handling
		874	# should not happen as we don't send expect: 100-continue,
		875	# but we handle it just in case.
		876	# since we send the request body regardless, if we get an error
		877	# we are out of-sync, which we currently do NOT handle correctly.
		878	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		879	if $2 eq 100;
		880
		881	push @pseudo,
		882	HTTPVersion => $1,
		883	Status => $2,
		884	Reason => $3,
		885	;
		886
		887	my $hdr = _parse_hdr
		888	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
		889
		890	%hdr = (%$hdr, @pseudo);
		891	}
		892
		893	# redirect handling
		894	# relative uri handling forced by microsoft and other shitheads.
		895	# we give our best and fall back to URI if available.
		896	if (exists $hdr{location}) {
		897	my $loc = $hdr{location};
		898
		899	if ($loc =~ m%^//%) { # //
		900	$loc = "$rscheme:$loc";
		901
		902	} elsif ($loc eq "") {
		903	$loc = $url;
		904
		905	} elsif ($loc !~ /^(?: $ \| [^:\/?\#]+ : )/x) { # anything "simple"
		906	$loc =~ s/^\.\/+//;
		907
		908	if ($loc !~ m%^[.?#]%) {
		909	my $prefix = "$rscheme://$uhost:$uport";
		910
		911	unless ($loc =~ s/^\///) {
		912	$prefix .= $upath;
		913	$prefix =~ s/\/[^\/]*$//;
		914	}
		915
		916	$loc = "$prefix/$loc";
		917
		918	} elsif (eval { require URI }) { # uri
		919	$loc = URI->new_abs ($loc, $url)->as_string;
		920
		921	} else {
		922	return _error %state, $cb, { @pseudo, Status => 599, Reason => "Cannot parse Location (URI module missing)" };
		923	#$hdr{Status} = 599;
		924	#$hdr{Reason} = "Unparsable Redirect (URI module missing)";
		925	#$recurse = 0;
		926	}
		927	}
		928
		929	$hdr{location} = $loc;
		930	}
		931
		932	my $redirect;
		933
		934	if ($recurse) {
		935	my $status = $hdr{Status};
		936
		937	# industry standard is to redirect POST as GET for
		938	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		939	# also, the UA should ask the user for 301 and 307 and POST,
		940	# industry standard seems to be to simply follow.
		941	# we go with the industry standard. 308 is defined
		942	# by rfc7538
		943	if ($status == 301 or $status == 302 or $status == 303) {
		944	$redirect = 1;
		945	# HTTP/1.1 is unclear on how to mutate the method
		946	unless ($method eq "HEAD") {
		947	$method = "GET";
		948	delete $arg{body};
		949	}
		950	} elsif ($status == 307 or $status == 308) {
		951	$redirect = 1;
		952	}
		953	}
		954
		955	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
		956	if ($state{handle}) {
		957	# handle keepalive
		958	if (
		959	$persistent
		960	&& $_[3]
		961	&& ($hdr{HTTPVersion} < 1.1
		962	? $hdr{connection} =~ /\bkeep-?alive\b/i
		963	: $hdr{connection} !~ /\bclose\b/i)
		964	) {
		965	ka_store $ka_key, delete $state{handle};
		966	} else {
		967	# no keepalive, destroy the handle
		968	$state{handle}->destroy;
		969	}
		970	}
		971
		972	%state = ();
		973
		974	if (defined $_[1]) {
		975	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		976	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		977	}
		978
		979	# set-cookie processing
		980	if ($arg{cookie_jar}) {
		981	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		982	}
		983
		984	if ($redirect && exists $hdr{location}) {
		985	# we ignore any errors, as it is very common to receive
		986	# Content-Length != 0 but no actual body
		987	# we also access %hdr, as $_[1] might be an erro
		988	$state{recurse} =
		989	http_request (
		990	$method => $hdr{location},
		991	%arg,
		992	recurse => $recurse - 1,
		993	Redirect => [$_[0], \%hdr],
		994	sub {
		995	%state = ();
		996	&$cb
		997	},
		998	);
		999	} else {
		1000	$cb->($_[0], \%hdr);
		1001	}
		1002	};
		1003
		1004	$ae_error = 597; # body phase
		1005
		1006	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		1007
		1008	my $len = $chunked ? undef : $hdr{"content-length"};
		1009
		1010	# body handling, many different code paths
		1011	# - no body expected
		1012	# - want_body_handle
		1013	# - te chunked
		1014	# - 2x length known (with or without on_body)
		1015	# - 2x length not known (with or without on_body)
		1016	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		1017	$finish->(undef, 598 => "Request cancelled by on_header");
		1018	} elsif (
		1019	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		1020	or $method eq "HEAD"
		1021	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		1022	) {
		1023	# no body
		1024	$finish->("", undef, undef, 1);
		1025
		1026	} elsif (!$redirect && $arg{want_body_handle}) {
		1027	$_[0]->on_eof (undef);
		1028	$_[0]->on_error (undef);
		1029	$_[0]->on_read (undef);
		1030
		1031	$finish->(delete $state{handle});
		1032
		1033	} elsif ($chunked) {
		1034	my $cl = 0;
		1035	my $body = "";
		1036	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		1037
		1038	$state{read_chunk} = sub {
		1039	$_[1] =~ /^([0-9a-fA-F]+)/
		1040	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1041
		1042	my $len = hex $1;
		1043
		1044	if ($len) {
		1045	$cl += $len;
		1046
		1047	$_[0]->push_read (chunk => $len, sub {
		1048	$on_body->($_[1], \%hdr)
		1049	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1050
		1051	$_[0]->push_read (line => sub {
		1052	length $_[1]
		1053	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1054	$_[0]->push_read (line => $state{read_chunk});
		1055	});
		1056	});
		1057	} else {
		1058	$hdr{"content-length"} \|\|= $cl;
		1059
		1060	$_[0]->push_read (line => $qr_nlnl, sub {
		1061	if (length $_[1]) {
		1062	for ("$_[1]") {
		1063	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		1064
		1065	my $hdr = _parse_hdr
		1066	or return $finish->(undef, $ae_error => "Garbled response trailers");
		1067
		1068	%hdr = (%hdr, %$hdr);
		1069	}
		1070	}
		1071
		1072	$finish->($body, undef, undef, 1);
		1073	});
		1074	}
		1075	};
		1076
		1077	$_[0]->push_read (line => $state{read_chunk});
		1078
		1079	} elsif ($arg{on_body}) {
		1080	if (defined $len) {
		1081	$_[0]->on_read (sub {
		1082	$len -= length $_[0]{rbuf};
		1083
		1084	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1085	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1086
		1087	$len > 0
		1088	or $finish->("", undef, undef, 1);
		1089	});
		1090	} else {
		1091	$_[0]->on_eof (sub {
		1092	$finish->("");
		1093	});
		1094	$_[0]->on_read (sub {
		1095	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1096	or $finish->(undef, 598 => "Request cancelled by on_body");
		1097	});
		1098	}
		1099	} else {
		1100	$_[0]->on_eof (undef);
		1101
		1102	if (defined $len) {
		1103	$_[0]->on_read (sub {
		1104	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1105	if $len <= length $_[0]{rbuf};
		1106	});
		1107	} else {
		1108	$_[0]->on_error (sub {
		1109	($! == Errno::EPIPE \|\| !$!)
		1110	? $finish->(delete $_[0]{rbuf})
		1111	: $finish->(undef, $ae_error => $_[2]);
		1112	});
		1113	$_[0]->on_read (sub { });
		1114	}
		1115	}
		1116	};
		1117
		1118	# if keepalive is enabled, then the server closing the connection
		1119	# before a response can happen legally - we retry on idempotent methods.
		1120	if ($was_persistent && $idempotent) {
		1121	my $old_eof = $hdl->{on_eof};
		1122	$hdl->{on_eof} = sub {
		1123	_destroy_state %state;
		1124
		1125	%state = ();
		1126	$state{recurse} =
		1127	http_request (
		1128	$method => $url,
		1129	%arg,
		1130	recurse => $recurse - 1,
		1131	persistent => 0,
		1132	sub {
		1133	%state = ();
		1134	&$cb
		1135	}
		1136	);
		1137	};
		1138	$hdl->on_read (sub {
		1139	return unless %state;
		1140
		1141	# as soon as we receive something, a connection close
		1142	# once more becomes a hard error
		1143	$hdl->{on_eof} = $old_eof;
		1144	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1145	});
		1146	} else {
		1147	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1148	}
		1149	};
		1150
		1151	my $prepare_handle = sub {
		1152	my ($hdl) = $state{handle};
		1153
		1154	$hdl->on_error (sub {
		1155	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1156	});
		1157	$hdl->on_eof (sub {
		1158	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1159	});
		1160	$hdl->timeout_reset;
		1161	$hdl->timeout ($timeout);
		1162	};
		1163
		1164	# connected to proxy (or origin server)
		1165	my $connect_cb = sub {
		1166	my $fh = shift
		1167	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1168
		1169	return unless delete $state{connect_guard};
		1170
		1171	# get handle
		1172	$state{handle} = new AnyEvent::Handle
		1173	%{ $arg{handle_params} },
		1174	fh => $fh,
		1175	peername => $uhost,
		1176	tls_ctx => $arg{tls_ctx},
		1177	;
		1178
		1179	$prepare_handle->();
		1180
		1181	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1182
		1183	# now handle proxy-CONNECT method
		1184	if ($proxy && $uscheme eq "https") {
		1185	# oh dear, we have to wrap it into a connect request
		1186
		1187	my $auth = exists $hdr{"proxy-authorization"}
		1188	? "proxy-authorization: " . (delete $hdr{"proxy-authorization"}) . "\015\012"
		1189	: "";
		1190
		1191	# maybe re-use $uauthority with patched port?
		1192	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012$auth\015\012");
		1193	$state{handle}->push_read (line => $qr_nlnl, sub {
		1194	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1195	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1196
		1197	if ($2 == 200) {
		1198	$rpath = $upath;
		1199	$handle_actual_request->();
		1200	} else {
		1201	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1202	}
		1203	});
		1204	} else {
		1205	delete $hdr{"proxy-authorization"} unless $proxy;
		1206
		1207	$handle_actual_request->();
		1208	}
		1209	};
416		1210
417	_get_slot $uhost, sub {	1211	_get_slot $uhost, sub {
418	$state{slot_guard} = shift;	1212	$state{slot_guard} = shift;
419		1213
420	return unless $state{connect_guard};	1214	return unless $state{connect_guard};
421		1215
422	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	1216	# try to use an existing keepalive connection, but only if we, ourselves, plan
423	$state{fh} = shift	1217	# on a keepalive request (in theory, this should be a separate config option).
424	or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url }));	1218	if ($persistent && $KA_CACHE{$ka_key}) {
425	pop; # free memory, save a tree	1219	$was_persistent = 1;
426		1220
427	return unless delete $state{connect_guard};	1221	$state{handle} = ka_fetch $ka_key;
		1222	$state{handle}->destroyed
		1223	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
		1224	$prepare_handle->();
		1225	$state{handle}->destroyed
		1226	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
		1227	$handle_actual_request->();
428		1228
429	# get handle
430	$state{handle} = new AnyEvent::Handle
431	fh => $state{fh},
432	timeout => $timeout,
433	peername => $rhost,
434	tls_ctx => $arg{tls_ctx};
435
436	# limit the number of persistent connections
437	# keepalive not yet supported
438	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
439	++$KA_COUNT{$_[1]};
440	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {
441	--$KA_COUNT{$_[1]}
442	};
443	$hdr{connection} = "keep-alive";
444	} else {	1229	} else {
445	delete $hdr{connection};	1230	my $tcp_connect = $arg{tcp_connect}
446	}	1231	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
447		1232
448	# (re-)configure handle	1233	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
449	$state{handle}->on_error (sub {
450	%state = ();
451	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
452	});
453	$state{handle}->on_eof (sub {
454	%state = ();
455	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
456	});
457
458	$state{handle}->starttls ("connect") if $rscheme eq "https";
459
460	# handle actual, non-tunneled, request
461	my $handle_actual_request = sub {
462	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
463
464	# send request
465	$state{handle}->push_write (
466	"$method $rpath HTTP/1.0\015\012"
467	. (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
468	. "\015\012"
469	. (delete $arg{body})
470	);
471
472	%hdr = (); # reduce memory usage, save a kitten
473
474	# status line
475	$state{handle}->push_read (line => $qr_nl, sub {
476	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
477	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
478
479	my %hdr = ( # response headers
480	HTTPVersion => ",$1",
481	Status => ",$2",
482	Reason => ",$3",
483	URL => ",$url"
484	);
485
486	# headers, could be optimized a bit
487	$state{handle}->unshift_read (line => $qr_nlnl, sub {
488	for ("$_[1]\012") {
489	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
490
491	# things seen, not parsed:
492	# p3pP="NON CUR OTPi OUR NOR UNI"
493
494	$hdr{lc $1} .= ",$2"
495	while /\G
496	([^:\000-\037]*):
497	[\011\040]*
498	((?: [^\012]+ \| \012[\011\040] )*)
499	\012
500	/gxc;
501
502	/\G$/
503	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
504	}
505
506	substr $_, 0, 1, ""
507	for values %hdr;
508
509	# redirect handling
510	# microsoft and other shitheads don't give a shit for following standards,
511	# try to support some common forms of broken Location headers.
512	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
513	$hdr{location} =~ s/^\.\/+//;
514
515	my $url = "$rscheme://$uhost:$uport";
516
517	unless ($hdr{location} =~ s/^\///) {
518	$url .= $upath;
519	$url =~ s/\/[^\/]*$//;
520	}
521
522	$hdr{location} = "$url/$hdr{location}";
523	}
524
525	my $redirect;
526
527	if ($recurse) {
528	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
529	# apparently, mozilla et al. just change POST to GET here
530	# more research is needed before we do the same
531	$redirect = 1;
532	} elsif ($hdr{Status} == 303) {
533	# even http/1.1 is unclear on how to mutate the method
534	$method = "GET" unless $method eq "HEAD";
535	$redirect = 1;
536	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET\|HEAD)$/) {
537	$redirect = 1;
538	}
539	}
540
541	my $finish = sub {
542	$state{handle}->destroy if $state{handle};
543	%state = ();
544
545	# set-cookie processing
546	if ($arg{cookie_jar}) {
547	for ($_[1]{"set-cookie"}) {
548	# parse NAME=VALUE
549	my @kv;
550
551	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
552	my $name = $1;
553	my $value = $3;
554
555	unless ($value) {
556	$value = $2;
557	$value =~ s/\\(.)/$1/gs;
558	}
559
560	push @kv, $name => $value;
561
562	last unless /\G\s*;/gc;
563	}
564
565	last unless @kv;
566
567	my $name = shift @kv;
568	my %kv = (value => shift @kv, @kv);
569
570	my $cdom;
571	my $cpath = (delete $kv{path}) \|\| "/";
572
573	if (exists $kv{domain}) {
574	$cdom = delete $kv{domain};
575
576	$cdom =~ s/^\.?/./; # make sure it starts with a "."
577
578	next if $cdom =~ /\.$/;
579
580	# this is not rfc-like and not netscape-like. go figure.
581	my $ndots = $cdom =~ y/.//;
582	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
583	} else {
584	$cdom = $uhost;
585	}
586
587	# store it
588	$arg{cookie_jar}{version} = 1;
589	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
590
591	redo if /\G\s*,/gc;
592	}
593	}
594
595	if ($redirect) {
596	# we ignore any errors, as it is very common to receive
597	# Content-Length != 0 but no actual body
598	# we also access %hdr, as $_[1] might be an erro
599	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
600	} else {
601	$cb->($_[0], $_[1]);
602	}
603	};
604
605	my $len = $hdr{"content-length"};
606
607	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
608	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
609	} elsif (
610	$hdr{Status} =~ /^(?:1..\|[23]04)$/
611	or $method eq "HEAD"
612	or (defined $len && !$len)
613	) {
614	# no body
615	$finish->("", \%hdr);
616	} else {
617	# body handling, four different code paths
618	# for want_body_handle, on_body (2x), normal (2x)
619	# we might read too much here, but it does not matter yet (no pers. connections)
620	if (!$redirect && $arg{want_body_handle}) {
621	$_[0]->on_eof (undef);
622	$_[0]->on_error (undef);
623	$_[0]->on_read (undef);
624
625	$finish->(delete $state{handle}, \%hdr);
626
627	} elsif ($arg{on_body}) {
628	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
629	if ($len) {
630	$_[0]->on_eof (undef);
631	$_[0]->on_read (sub {
632	$len -= length $_[0]{rbuf};
633
634	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
635	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
636
637	$len > 0
638	or $finish->("", \%hdr);
639	});
640	} else {
641	$_[0]->on_eof (sub {
642	$finish->("", \%hdr);
643	});
644	$_[0]->on_read (sub {
645	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
646	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
647	});
648	}
649	} else {
650	$_[0]->on_eof (undef);
651
652	if ($len) {
653	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
654	$_[0]->on_read (sub {
655	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
656	if $len <= length $_[0]{rbuf};
657	});
658	} else {
659	$_[0]->on_error (sub {
660	$! == Errno::EPIPE \|\| !$!
661	? $finish->(delete $_[0]{rbuf}, \%hdr)
662	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
663	});
664	$_[0]->on_read (sub { });
665	}
666	}
667	}
668	});
669	});
670	};
671
672	# now handle proxy-CONNECT method
673	if ($proxy && $uscheme eq "https") {
674	# oh dear, we have to wrap it into a connect request
675
676	# maybe re-use $uauthority with patched port?
677	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
678	$state{handle}->push_read (line => $qr_nlnl, sub {
679	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
680	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
681
682	if ($2 == 200) {
683	$rpath = $upath;
684	&$handle_actual_request;
685	} else {
686	%state = ();
687	$cb->(undef, { Status => $2, Reason => $3, URL => $url });
688	}
689	});
690	} else {
691	&$handle_actual_request;
692	}
693
694	}, sub {
695	$timeout
696	};	1234	}
697	};	1235	};
698		1236
699	defined wantarray && AnyEvent::Util::guard { %state = () }	1237	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
700	}	1238	}
701		1239
702	sub http_get($@) {	1240	sub http_get($@) {
703	unshift @_, "GET";	1241	unshift @_, "GET";
704	&http_request	1242	&http_request
…		…
715	&http_request	1253	&http_request
716	}	1254	}
717		1255
718	=back	1256	=back
719		1257
		1258	=head2 DNS CACHING
		1259
		1260	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		1261	the actual connection, which in turn uses AnyEvent::DNS to resolve
		1262	hostnames. The latter is a simple stub resolver and does no caching
		1263	on its own. If you want DNS caching, you currently have to provide
		1264	your own default resolver (by storing a suitable resolver object in
		1265	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
		1266
720	=head2 GLOBAL FUNCTIONS AND VARIABLES	1267	=head2 GLOBAL FUNCTIONS AND VARIABLES
721		1268
722	=over 4	1269	=over 4
723		1270
724	=item AnyEvent::HTTP::set_proxy "proxy-url"	1271	=item AnyEvent::HTTP::set_proxy "proxy-url"
725		1272
726	Sets the default proxy server to use. The proxy-url must begin with a	1273	Sets the default proxy server to use. The proxy-url must begin with a
727	string of the form C<http://host:port> (optionally C<https:...>).	1274	string of the form C<http://host:port>, croaks otherwise.
		1275
		1276	To clear an already-set proxy, use C<undef>.
		1277
		1278	When AnyEvent::HTTP is loaded for the first time it will query the
		1279	default proxy from the operating system, currently by looking at
		1280	C<$ENV{http_proxy>}.
		1281
		1282	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
		1283
		1284	Remove all cookies from the cookie jar that have been expired. If
		1285	C<$session_end> is given and true, then additionally remove all session
		1286	cookies.
		1287
		1288	You should call this function (with a true C<$session_end>) before you
		1289	save cookies to disk, and you should call this function after loading them
		1290	again. If you have a long-running program you can additionally call this
		1291	function from time to time.
		1292
		1293	A cookie jar is initially an empty hash-reference that is managed by this
		1294	module. Its format is subject to change, but currently it is as follows:
		1295
		1296	The key C<version> has to contain C<1>, otherwise the hash gets
		1297	emptied. All other keys are hostnames or IP addresses pointing to
		1298	hash-references. The key for these inner hash references is the
		1299	server path for which this cookie is meant, and the values are again
		1300	hash-references. Each key of those hash-references is a cookie name, and
		1301	the value, you guessed it, is another hash-reference, this time with the
		1302	key-value pairs from the cookie, except for C<expires> and C<max-age>,
		1303	which have been replaced by a C<_expires> key that contains the cookie
		1304	expiry timestamp. Session cookies are indicated by not having an
		1305	C<_expires> key.
		1306
		1307	Here is an example of a cookie jar with a single cookie, so you have a
		1308	chance of understanding the above paragraph:
		1309
		1310	{
		1311	version => 1,
		1312	"10.0.0.1" => {
		1313	"/" => {
		1314	"mythweb_id" => {
		1315	_expires => 1293917923,
		1316	value => "ooRung9dThee3ooyXooM1Ohm",
		1317	},
		1318	},
		1319	},
		1320	}
		1321
		1322	=item $date = AnyEvent::HTTP::format_date $timestamp
		1323
		1324	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		1325	Date (RFC 2616).
		1326
		1327	=item $timestamp = AnyEvent::HTTP::parse_date $date
		1328
		1329	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
		1330	bunch of minor variations of those, and returns the corresponding POSIX
		1331	timestamp, or C<undef> if the date cannot be parsed.
728		1332
729	=item $AnyEvent::HTTP::MAX_RECURSE	1333	=item $AnyEvent::HTTP::MAX_RECURSE
730		1334
731	The default value for the C<recurse> request parameter (default: C<10>).	1335	The default value for the C<recurse> request parameter (default: C<10>).
		1336
		1337	=item $AnyEvent::HTTP::TIMEOUT
		1338
		1339	The default timeout for connection operations (default: C<300>).
732		1340
733	=item $AnyEvent::HTTP::USERAGENT	1341	=item $AnyEvent::HTTP::USERAGENT
734		1342
735	The default value for the C<User-Agent> header (the default is	1343	The default value for the C<User-Agent> header (the default is
736	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1344	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
737		1345
738	=item $AnyEvent::HTTP::MAX_PER_HOST	1346	=item $AnyEvent::HTTP::MAX_PER_HOST
739		1347
740	The maximum number of concurrent conenctions to the same host (identified	1348	The maximum number of concurrent connections to the same host (identified
741	by the hostname). If the limit is exceeded, then the additional requests	1349	by the hostname). If the limit is exceeded, then additional requests
742	are queued until previous connections are closed.	1350	are queued until previous connections are closed. Both persistent and
		1351	non-persistent connections are counted in this limit.
743		1352
744	The default value for this is C<4>, and it is highly advisable to not	1353	The default value for this is C<4>, and it is highly advisable to not
745	increase it.	1354	increase it much.
		1355
		1356	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1357	connections, older browsers used 2, newer ones (such as firefox 3)
		1358	typically use 6, and Opera uses 8 because like, they have the fastest
		1359	browser and give a shit for everybody else on the planet.
		1360
		1361	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1362
		1363	The time after which idle persistent connections get closed by
		1364	AnyEvent::HTTP (default: C<3>).
746		1365
747	=item $AnyEvent::HTTP::ACTIVE	1366	=item $AnyEvent::HTTP::ACTIVE
748		1367
749	The number of active connections. This is not the number of currently	1368	The number of active connections. This is not the number of currently
750	running requests, but the number of currently open and non-idle TCP	1369	running requests, but the number of currently open and non-idle TCP
751	connections. This number of can be useful for load-leveling.	1370	connections. This number can be useful for load-leveling.
752		1371
753	=back	1372	=back
754		1373
755	=cut	1374	=cut
756		1375
		1376	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		1377	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		1378
		1379	sub format_date($) {
		1380	my ($time) = @_;
		1381
		1382	# RFC 822/1123 format
		1383	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		1384
		1385	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		1386	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		1387	$H, $M, $S;
		1388	}
		1389
		1390	sub parse_date($) {
		1391	my ($date) = @_;
		1392
		1393	my ($d, $m, $y, $H, $M, $S);
		1394
		1395	if ($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$/) {
		1396	# RFC 822/1123, required by RFC 2616 (with " ")
		1397	# cookie dates (with "-")
		1398
		1399	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		1400
		1401	} elsif ($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$/) {
		1402	# RFC 850
		1403	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		1404
		1405	} elsif ($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])$/) {
		1406	# ISO C's asctime
		1407	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		1408	}
		1409	# other formats fail in the loop below
		1410
		1411	for (0..11) {
		1412	if ($m eq $month[$_]) {
		1413	require Time::Local;
		1414	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
		1415	}
		1416	}
		1417
		1418	undef
		1419	}
		1420
757	sub set_proxy($) {	1421	sub set_proxy($) {
758	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	1422	if (length $_[0]) {
		1423	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
		1424	or Carp::croak "$_[0]: invalid proxy URL";
		1425	$PROXY = [$2, $3 \|\| 3128, $1]
		1426	} else {
		1427	undef $PROXY;
		1428	}
759	}	1429	}
760		1430
761	# initialise proxy from environment	1431	# initialise proxy from environment
		1432	eval {
762	set_proxy $ENV{http_proxy};	1433	set_proxy $ENV{http_proxy};
		1434	};
		1435
		1436	=head2 SHOWCASE
		1437
		1438	This section contains some more elaborate "real-world" examples or code
		1439	snippets.
		1440
		1441	=head2 HTTP/1.1 FILE DOWNLOAD
		1442
		1443	Downloading files with HTTP can be quite tricky, especially when something
		1444	goes wrong and you want to resume.
		1445
		1446	Here is a function that initiates and resumes a download. It uses the
		1447	last modified time to check for file content changes, and works with many
		1448	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1449	on older servers.
		1450
		1451	It calls the completion callback with either C<undef>, which means a
		1452	nonretryable error occurred, C<0> when the download was partial and should
		1453	be retried, and C<1> if it was successful.
		1454
		1455	use AnyEvent::HTTP;
		1456
		1457	sub download($$$) {
		1458	my ($url, $file, $cb) = @_;
		1459
		1460	open my $fh, "+<", $file
		1461	or die "$file: $!";
		1462
		1463	my %hdr;
		1464	my $ofs = 0;
		1465
		1466	warn stat $fh;
		1467	warn -s _;
		1468	if (stat $fh and -s _) {
		1469	$ofs = -s _;
		1470	warn "-s is ", $ofs;
		1471	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1472	$hdr{"range"} = "bytes=$ofs-";
		1473	}
		1474
		1475	http_get $url,
		1476	headers => \%hdr,
		1477	on_header => sub {
		1478	my ($hdr) = @_;
		1479
		1480	if ($hdr->{Status} == 200 && $ofs) {
		1481	# resume failed
		1482	truncate $fh, $ofs = 0;
		1483	}
		1484
		1485	sysseek $fh, $ofs, 0;
		1486
		1487	1
		1488	},
		1489	on_body => sub {
		1490	my ($data, $hdr) = @_;
		1491
		1492	if ($hdr->{Status} =~ /^2/) {
		1493	length $data == syswrite $fh, $data
		1494	or return; # abort on write errors
		1495	}
		1496
		1497	1
		1498	},
		1499	sub {
		1500	my (undef, $hdr) = @_;
		1501
		1502	my $status = $hdr->{Status};
		1503
		1504	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1505	utime $fh, $time, $time;
		1506	}
		1507
		1508	if ($status == 200 \|\| $status == 206 \|\| $status == 416) {
		1509	# download ok \|\| resume ok \|\| file already fully downloaded
		1510	$cb->(1, $hdr);
		1511
		1512	} elsif ($status == 412) {
		1513	# file has changed while resuming, delete and retry
		1514	unlink $file;
		1515	$cb->(0, $hdr);
		1516
		1517	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1518	# retry later
		1519	$cb->(0, $hdr);
		1520
		1521	} else {
		1522	$cb->(undef, $hdr);
		1523	}
		1524	}
		1525	;
		1526	}
		1527
		1528	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1529	if ($_[0]) {
		1530	print "OK!\n";
		1531	} elsif (defined $_[0]) {
		1532	print "please retry later\n";
		1533	} else {
		1534	print "ERROR\n";
		1535	}
		1536	};
		1537
		1538	=head3 SOCKS PROXIES
		1539
		1540	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		1541	compile your perl to support socks, or use an external program such as
		1542	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		1543	transparently.
		1544
		1545	Alternatively, for AnyEvent::HTTP only, you can use your own
		1546	C<tcp_connect> function that does the proxy handshake - here is an example
		1547	that works with socks4a proxies:
		1548
		1549	use Errno;
		1550	use AnyEvent::Util;
		1551	use AnyEvent::Socket;
		1552	use AnyEvent::Handle;
		1553
		1554	# host, port and username of/for your socks4a proxy
		1555	my $socks_host = "10.0.0.23";
		1556	my $socks_port = 9050;
		1557	my $socks_user = "";
		1558
		1559	sub socks4a_connect {
		1560	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		1561
		1562	my $hdl = new AnyEvent::Handle
		1563	connect => [$socks_host, $socks_port],
		1564	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1565	on_error => sub { $connect_cb->() },
		1566	;
		1567
		1568	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1569
		1570	$hdl->push_read (chunk => 8, sub {
		1571	my ($hdl, $chunk) = @_;
		1572	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1573
		1574	if ($status == 0x5a) {
		1575	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1576	} else {
		1577	$! = Errno::ENXIO; $connect_cb->();
		1578	}
		1579	});
		1580
		1581	$hdl
		1582	}
		1583
		1584	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1585	possibly after switching off other proxy types:
		1586
		1587	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1588
		1589	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1590	my ($data, $headers) = @_;
		1591	...
		1592	};
763		1593
764	=head1 SEE ALSO	1594	=head1 SEE ALSO
765		1595
766	L<AnyEvent>.	1596	L<AnyEvent>.
767		1597

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.43 by root, Mon Jul 6 03:03:12 2009 UTC vs. Revision 1.124 by root, Fri May 8 21:26:16 2015 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.43 by root, Mon Jul 6 03:03:12 2009 UTC vs.
Revision 1.124 by root, Fri May 8 21:26:16 2015 UTC