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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.84 by root, Sun Jan 2 05:13:27 2011 UTC vs.
Revision 1.117 by root, Mon Sep 9 21:41:43 2013 UTC

…		…
15	This module is an L<AnyEvent> user, you need to make sure that you use and	15	This module is an L<AnyEvent> user, you need to make sure that you use and
16	run a supported event loop.	16	run a supported event loop.
17		17
18	This module implements a simple, stateless and non-blocking HTTP	18	This module implements a simple, stateless and non-blocking HTTP
19	client. It supports GET, POST and other request methods, cookies and more,	19	client. It supports GET, POST and other request methods, cookies and more,
20	all on a very low level. It can follow redirects supports proxies and	20	all on a very low level. It can follow redirects, supports proxies, and
21	automatically limits the number of connections to the values specified in	21	automatically limits the number of connections to the values specified in
22	the RFC.	22	the RFC.
23		23
24	It should generally be a "good client" that is enough for most HTTP	24	It should generally be a "good client" that is enough for most HTTP
25	tasks. Simple tasks should be simple, but complex tasks should still be	25	tasks. Simple tasks should be simple, but complex tasks should still be
…		…
36		36
37	=cut	37	=cut
38		38
39	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
40		40
41	use strict;	41	use common::sense;
42	no warnings;
43		42
44	use Errno ();	43	use Errno ();
45		44
46	use AnyEvent 5.0 ();	45	use AnyEvent 5.0 ();
47	use AnyEvent::Util ();	46	use AnyEvent::Util ();
48	use AnyEvent::Handle ();	47	use AnyEvent::Handle ();
49		48
50	use base Exporter::;	49	use base Exporter::;
51		50
52	our $VERSION = '1.5';	51	our $VERSION = '2.15';
53		52
54	our @EXPORT = qw(http_get http_post http_head http_request);	53	our @EXPORT = qw(http_get http_post http_head http_request);
55		54
56	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	55	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
57	our $MAX_RECURSE = 10;	56	our $MAX_RECURSE = 10;
58	our $MAX_PERSISTENT = 8;
59	our $PERSISTENT_TIMEOUT = 2;	57	our $PERSISTENT_TIMEOUT = 3;
60	our $TIMEOUT = 300;	58	our $TIMEOUT = 300;
61		59	our $MAX_PER_HOST = 4; # changing this is evil
62	# changing these is evil
63	our $MAX_PERSISTENT_PER_HOST = 0;
64	our $MAX_PER_HOST = 4;
65		60
66	our $PROXY;	61	our $PROXY;
67	our $ACTIVE = 0;	62	our $ACTIVE = 0;
68		63
69	my %KA_COUNT; # number of open keep-alive connections per host	64	my %KA_CACHE; # indexed by uhost currently, points to [$handle...] array
70	my %CO_SLOT; # number of open connections, and wait queue, per host	65	my %CO_SLOT; # number of open connections, and wait queue, per host
71		66
72	=item http_get $url, key => value..., $cb->($data, $headers)	67	=item http_get $url, key => value..., $cb->($data, $headers)
73		68
74	Executes an HTTP-GET request. See the http_request function for details on	69	Executes an HTTP-GET request. See the http_request function for details on
…		…
94	C<http_request> returns a "cancellation guard" - you have to keep the	89	C<http_request> returns a "cancellation guard" - you have to keep the
95	object at least alive until the callback get called. If the object gets	90	object at least alive until the callback get called. If the object gets
96	destroyed before the callback is called, the request will be cancelled.	91	destroyed before the callback is called, the request will be cancelled.
97		92
98	The callback will be called with the response body data as first argument	93	The callback will be called with the response body data as first argument
99	(or C<undef> if an error occured), and a hash-ref with response headers	94	(or C<undef> if an error occurred), and a hash-ref with response headers
100	(and trailers) as second argument.	95	(and trailers) as second argument.
101		96
102	All the headers in that hash are lowercased. In addition to the response	97	All the headers in that hash are lowercased. In addition to the response
103	headers, the "pseudo-headers" (uppercase to avoid clashing with possible	98	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
104	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the	99	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
…		…
128	C<590>-C<599> and the C<Reason> pseudo-header will contain an error	123	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
129	message. Currently the following status codes are used:	124	message. Currently the following status codes are used:
130		125
131	=over 4	126	=over 4
132		127
133	=item 595 - errors during connection etsbalishment, proxy handshake.	128	=item 595 - errors during connection establishment, proxy handshake.
134		129
135	=item 596 - errors during TLS negotiation, request sending and header processing.	130	=item 596 - errors during TLS negotiation, request sending and header processing.
136		131
137	=item 597 - errors during body receiving or processing.	132	=item 597 - errors during body receiving or processing.
138		133
…		…
159		154
160	=over 4	155	=over 4
161		156
162	=item recurse => $count (default: $MAX_RECURSE)	157	=item recurse => $count (default: $MAX_RECURSE)
163		158
164	Whether to recurse requests or not, e.g. on redirects, authentication	159	Whether to recurse requests or not, e.g. on redirects, authentication and
165	retries and so on, and how often to do so.	160	other retries and so on, and how often to do so.
166		161
167	=item headers => hashref	162	=item headers => hashref
168		163
169	The request headers to use. Currently, C<http_request> may provide its own	164	The request headers to use. Currently, C<http_request> may provide its own
170	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and	165	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
171	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>	166	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	167	(this can be suppressed by using C<undef> for these headers in which case
173	they won't be sent at all).	168	they won't be sent at all).
174		169
		170	You really should provide your own C<User-Agent:> header value that is
		171	appropriate for your program - I wouldn't be surprised if the default
		172	AnyEvent string gets blocked by webservers sooner or later.
		173
		174	Also, make sure that your headers names and values do not contain any
		175	embedded newlines.
		176
175	=item timeout => $seconds	177	=item timeout => $seconds
176		178
177	The time-out to use for various stages - each connect attempt will reset	179	The time-out to use for various stages - each connect attempt will reset
178	the timeout, as will read or write activity, i.e. this is not an overall	180	the timeout, as will read or write activity, i.e. this is not an overall
179	timeout.	181	timeout.
180		182
181	Default timeout is 5 minutes.	183	Default timeout is 5 minutes.
182		184
183	=item proxy => [$host, $port[, $scheme]] or undef	185	=item proxy => [$host, $port[, $scheme]] or undef
184		186
185	Use the given http proxy for all requests. If not specified, then the	187	Use the given http proxy for all requests, or no proxy if C<undef> is
186	default proxy (as specified by C<$ENV{http_proxy}>) is used.	188	used.
187		189
188	C<$scheme> must be either missing, C<http> for HTTP or C<https> for	190	C<$scheme> must be either missing or must be C<http> for HTTP.
189	HTTPS.	191
		192	If not specified, then the default proxy is used (see
		193	C<AnyEvent::HTTP::set_proxy>).
190		194
191	=item body => $string	195	=item body => $string
192		196
193	The request body, usually empty. Will be sent as-is (future versions of	197	The request body, usually empty. Will be sent as-is (future versions of
194	this module might offer more options).	198	this module might offer more options).
…		…
225	verification) TLS context.	229	verification) TLS context.
226		230
227	The default for this option is C<low>, which could be interpreted as "give	231	The default for this option is C<low>, which could be interpreted as "give
228	me the page, no matter what".	232	me the page, no matter what".
229		233
		234	See also the C<sessionid> parameter.
		235
		236	=item session => $string
		237
		238	The module might reuse connections to the same host internally. Sometimes
		239	(e.g. when using TLS), you do not want to reuse connections from other
		240	sessions. This can be achieved by setting this parameter to some unique
		241	ID (such as the address of an object storing your state data, or the TLS
		242	context) - only connections using the same unique ID will be reused.
		243
230	=item on_prepare => $callback->($fh)	244	=item on_prepare => $callback->($fh)
231		245
232	In rare cases you need to "tune" the socket before it is used to	246	In rare cases you need to "tune" the socket before it is used to
233	connect (for exmaple, to bind it on a given IP address). This parameter	247	connect (for example, to bind it on a given IP address). This parameter
234	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	248	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
235	and behaves exactly the same way (e.g. it has to provide a	249	and behaves exactly the same way (e.g. it has to provide a
236	timeout). See the description for the C<$prepare_cb> argument of	250	timeout). See the description for the C<$prepare_cb> argument of
237	C<AnyEvent::Socket::tcp_connect> for details.	251	C<AnyEvent::Socket::tcp_connect> for details.
238		252
…		…
303	called. Instead of the C<$body> argument containing the body data, the	317	called. Instead of the C<$body> argument containing the body data, the
304	callback will receive the L<AnyEvent::Handle> object associated with the	318	callback will receive the L<AnyEvent::Handle> object associated with the
305	connection. In error cases, C<undef> will be passed. When there is no body	319	connection. In error cases, C<undef> will be passed. When there is no body
306	(e.g. status C<304>), the empty string will be passed.	320	(e.g. status C<304>), the empty string will be passed.
307		321
308	The handle object might or might not be in TLS mode, might be connected to	322	The handle object might or might not be in TLS mode, might be connected
309	a proxy, be a persistent connection etc., and configured in unspecified	323	to a proxy, be a persistent connection, use chunked transfer encoding
310	ways. The user is responsible for this handle (it will not be used by this	324	etc., and configured in unspecified ways. The user is responsible for this
311	module anymore).	325	handle (it will not be used by this module anymore).
312		326
313	This is useful with some push-type services, where, after the initial	327	This is useful with some push-type services, where, after the initial
314	headers, an interactive protocol is used (typical example would be the	328	headers, an interactive protocol is used (typical example would be the
315	push-style twitter API which starts a JSON/XML stream).	329	push-style twitter API which starts a JSON/XML stream).
316		330
317	If you think you need this, first have a look at C<on_body>, to see if	331	If you think you need this, first have a look at C<on_body>, to see if
318	that doesn't solve your problem in a better way.	332	that doesn't solve your problem in a better way.
		333
		334	=item persistent => $boolean
		335
		336	Try to create/reuse a persistent connection. When this flag is set
		337	(default: true for idempotent requests, false for all others), then
		338	C<http_request> tries to re-use an existing (previously-created)
		339	persistent connection to the host and, failing that, tries to create a new
		340	one.
		341
		342	Requests failing in certain ways will be automatically retried once, which
		343	is dangerous for non-idempotent requests, which is why it defaults to off
		344	for them. The reason for this is because the bozos who designed HTTP/1.1
		345	made it impossible to distinguish between a fatal error and a normal
		346	connection timeout, so you never know whether there was a problem with
		347	your request or not.
		348
		349	When reusing an existent connection, many parameters (such as TLS context)
		350	will be ignored. See the C<session> parameter for a workaround.
		351
		352	=item keepalive => $boolean
		353
		354	Only used when C<persistent> is also true. This parameter decides whether
		355	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		356	(as opposed to only a HTTP/1.1 persistent connection).
		357
		358	The default is true, except when using a proxy, in which case it defaults
		359	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		360
		361	=item handle_params => { key => value ... }
		362
		363	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		364	constructor that is called - not all requests will create a handle, and
		365	sometimes more than one is created, so this parameter is only good for
		366	setting hints.
		367
		368	Example: set the maximum read size to 4096, to potentially conserve memory
		369	at the cost of speed.
		370
		371	handle_params => {
		372	max_read_size => 4096,
		373	},
319		374
320	=back	375	=back
321		376
322	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	377	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
323	the response body.	378	the response body.
…		…
329		384
330	Example: do a HTTP HEAD request on https://www.google.com/, use a	385	Example: do a HTTP HEAD request on https://www.google.com/, use a
331	timeout of 30 seconds.	386	timeout of 30 seconds.
332		387
333	http_request	388	http_request
334	GET => "https://www.google.com",	389	HEAD => "https://www.google.com",
		390	headers => { "user-agent" => "MySearchClient 1.0" },
335	timeout => 30,	391	timeout => 30,
336	sub {	392	sub {
337	my ($body, $hdr) = @_;	393	my ($body, $hdr) = @_;
338	use Data::Dumper;	394	use Data::Dumper;
339	print Dumper $hdr;	395	print Dumper $hdr;
…		…
349	};	405	};
350		406
351	undef $request;	407	undef $request;
352		408
353	=cut	409	=cut
		410
		411	#############################################################################
		412	# wait queue/slots
354		413
355	sub _slot_schedule;	414	sub _slot_schedule;
356	sub _slot_schedule($) {	415	sub _slot_schedule($) {
357	my $host = shift;	416	my $host = shift;
358		417
…		…
381		440
382	_slot_schedule $_[0];	441	_slot_schedule $_[0];
383	}	442	}
384		443
385	#############################################################################	444	#############################################################################
		445	# cookie handling
386		446
387	# expire cookies	447	# expire cookies
388	sub cookie_jar_expire($;$) {	448	sub cookie_jar_expire($;$) {
389	my ($jar, $session_end) = @_;	449	my ($jar, $session_end) = @_;
390		450
…		…
414	}	474	}
415	}	475	}
416		476
417	# extract cookies from jar	477	# extract cookies from jar
418	sub cookie_jar_extract($$$$) {	478	sub cookie_jar_extract($$$$) {
419	my ($jar, $uscheme, $uhost, $upath) = @_;	479	my ($jar, $scheme, $host, $path) = @_;
420
421	$uhost = lc $uhost;
422		480
423	%$jar = () if $jar->{version} != 1;	481	%$jar = () if $jar->{version} != 1;
424		482
425	my @cookies;	483	my @cookies;
426		484
427	while (my ($chost, $paths) = each %$jar) {	485	while (my ($chost, $paths) = each %$jar) {
428	next unless ref $paths;	486	next unless ref $paths;
429		487
430	if ($chost =~ /^\./) {	488	if ($chost =~ /^\./) {
431	next unless $chost eq substr $uhost, -length $chost;	489	next unless $chost eq substr $host, -length $chost;
432	} elsif ($chost =~ /\./) {	490	} elsif ($chost =~ /\./) {
433	next unless $chost eq $uhost;	491	next unless $chost eq $host;
434	} else {	492	} else {
435	next;	493	next;
436	}	494	}
437		495
438	while (my ($cpath, $cookies) = each %$paths) {	496	while (my ($cpath, $cookies) = each %$paths) {
439	next unless $cpath eq substr $upath, 0, length $cpath;	497	next unless $cpath eq substr $path, 0, length $cpath;
440		498
441	while (my ($cookie, $kv) = each %$cookies) {	499	while (my ($cookie, $kv) = each %$cookies) {
442	next if $uscheme ne "https" && exists $kv->{secure};	500	next if $scheme ne "https" && exists $kv->{secure};
443		501
444	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {	502	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
445	delete $cookies->{$cookie};	503	delete $cookies->{$cookie};
446	next;	504	next;
447	}	505	}
…		…
461	\@cookies	519	\@cookies
462	}	520	}
463		521
464	# parse set_cookie header into jar	522	# parse set_cookie header into jar
465	sub cookie_jar_set_cookie($$$$) {	523	sub cookie_jar_set_cookie($$$$) {
466	my ($jar, $set_cookie, $uhost, $date) = @_;	524	my ($jar, $set_cookie, $host, $date) = @_;
467		525
468	my $anow = int AE::now;	526	my $anow = int AE::now;
469	my $snow; # server-now	527	my $snow; # server-now
470		528
471	for ($set_cookie) {	529	for ($set_cookie) {
…		…
477	while (	535	while (
478	m{	536	m{
479	\G\s*	537	\G\s*
480	(?:	538	(?:
481	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)	539	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
482	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) ) )?	540	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^;,[:space:]]) ) )?
483	)	541	)
484	}gcxsi	542	}gcxsi
485	) {	543	) {
486	my $name = $2;	544	my $name = $2;
487	my $value = $4;	545	my $value = $4;
…		…
494	# quoted	552	# quoted
495	$value = $3;	553	$value = $3;
496	$value =~ s/\\(.)/$1/gs;	554	$value =~ s/\\(.)/$1/gs;
497	}	555	}
498		556
499	push @kv, lc $name, $value;	557	push @kv, @kv ? lc $name : $name, $value;
500		558
501	last unless /\G\s*;/gc;	559	last unless /\G\s*;/gc;
502	}	560	}
503		561
504	last unless @kv;	562	last unless @kv;
…		…
527		585
528	# this is not rfc-like and not netscape-like. go figure.	586	# this is not rfc-like and not netscape-like. go figure.
529	my $ndots = $cdom =~ y/.//;	587	my $ndots = $cdom =~ y/.//;
530	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	588	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
531	} else {	589	} else {
532	$cdom = $uhost;	590	$cdom = $host;
533	}	591	}
534		592
535	# store it	593	# store it
536	$jar->{version} = 1;	594	$jar->{version} = 1;
537	$jar->{lc $cdom}{$cpath}{$name} = \%kv;	595	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
538		596
539	redo if /\G\s*,/gc;	597	redo if /\G\s*,/gc;
540	}	598	}
541	}	599	}
542		600
		601	#############################################################################
		602	# keepalive/persistent connection cache
		603
		604	# fetch a connection from the keepalive cache
		605	sub ka_fetch($) {
		606	my $ka_key = shift;
		607
		608	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		609	delete $KA_CACHE{$ka_key}
		610	unless @{ $KA_CACHE{$ka_key} };
		611
		612	$hdl
		613	}
		614
		615	sub ka_store($$) {
		616	my ($ka_key, $hdl) = @_;
		617
		618	my $kaa = $KA_CACHE{$ka_key} \|\|= [];
		619
		620	my $destroy = sub {
		621	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		622
		623	$hdl->destroy;
		624
		625	@ka
		626	? $KA_CACHE{$ka_key} = \@ka
		627	: delete $KA_CACHE{$ka_key};
		628	};
		629
		630	# on error etc., destroy
		631	$hdl->on_error ($destroy);
		632	$hdl->on_eof ($destroy);
		633	$hdl->on_read ($destroy);
		634	$hdl->timeout ($PERSISTENT_TIMEOUT);
		635
		636	push @$kaa, $hdl;
		637	shift @$kaa while @$kaa > $MAX_PER_HOST;
		638	}
		639
		640	#############################################################################
		641	# utilities
		642
543	# continue to parse $_ for headers and place them into the arg	643	# continue to parse $_ for headers and place them into the arg
544	sub parse_hdr() {	644	sub _parse_hdr() {
545	my %hdr;	645	my %hdr;
546		646
547	# things seen, not parsed:	647	# things seen, not parsed:
548	# p3pP="NON CUR OTPi OUR NOR UNI"	648	# p3pP="NON CUR OTPi OUR NOR UNI"
549		649
…		…
563	for values %hdr;	663	for values %hdr;
564		664
565	\%hdr	665	\%hdr
566	}	666	}
567		667
		668	#############################################################################
		669	# http_get
		670
568	our $qr_nlnl = qr{(?<![^\012])\015?\012};	671	our $qr_nlnl = qr{(?<![^\012])\015?\012};
569		672
570	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	673	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
571	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	674	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		675
		676	# maybe it should just become a normal object :/
		677
		678	sub _destroy_state(\%) {
		679	my ($state) = @_;
		680
		681	$state->{handle}->destroy if $state->{handle};
		682	%$state = ();
		683	}
		684
		685	sub _error(\%$$) {
		686	my ($state, $cb, $hdr) = @_;
		687
		688	&_destroy_state ($state);
		689
		690	$cb->(undef, $hdr);
		691	()
		692	}
		693
		694	our %IDEMPOTENT = (
		695	DELETE => 1,
		696	GET => 1,
		697	HEAD => 1,
		698	OPTIONS => 1,
		699	PUT => 1,
		700	TRACE => 1,
		701
		702	ACL => 1,
		703	"BASELINE-CONTROL" => 1,
		704	BIND => 1,
		705	CHECKIN => 1,
		706	CHECKOUT => 1,
		707	COPY => 1,
		708	LABEL => 1,
		709	LINK => 1,
		710	MERGE => 1,
		711	MKACTIVITY => 1,
		712	MKCALENDAR => 1,
		713	MKCOL => 1,
		714	MKREDIRECTREF => 1,
		715	MKWORKSPACE => 1,
		716	MOVE => 1,
		717	ORDERPATCH => 1,
		718	PROPFIND => 1,
		719	PROPPATCH => 1,
		720	REBIND => 1,
		721	REPORT => 1,
		722	SEARCH => 1,
		723	UNBIND => 1,
		724	UNCHECKOUT => 1,
		725	UNLINK => 1,
		726	UNLOCK => 1,
		727	UPDATE => 1,
		728	UPDATEREDIRECTREF => 1,
		729	"VERSION-CONTROL" => 1,
		730	);
572		731
573	sub http_request($$@) {	732	sub http_request($$@) {
574	my $cb = pop;	733	my $cb = pop;
575	my ($method, $url, %arg) = @_;	734	my ($method, $url, %arg) = @_;
576		735
…		…
594	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	753	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
595		754
596	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	755	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
597	if $recurse < 0;	756	if $recurse < 0;
598		757
599	my $proxy = $arg{proxy} \|\| $PROXY;	758	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
600	my $timeout = $arg{timeout} \|\| $TIMEOUT;	759	my $timeout = $arg{timeout} \|\| $TIMEOUT;
601		760
602	my ($uscheme, $uauthority, $upath, $query, $fragment) =	761	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
603	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;	762	$url =~ m\|^([^:]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
604		763
605	$uscheme = lc $uscheme;	764	$uscheme = lc $uscheme;
606		765
607	my $uport = $uscheme eq "http" ? 80	766	my $uport = $uscheme eq "http" ? 80
608	: $uscheme eq "https" ? 443	767	: $uscheme eq "https" ? 443
609	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });	768	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
610		769
611	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	770	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
612	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	771	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
613		772
614	my $uhost = $1;	773	my $uhost = lc $1;
615	$uport = $2 if defined $2;	774	$uport = $2 if defined $2;
616		775
617	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	776	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
618	unless exists $hdr{host};	777	unless exists $hdr{host};
619		778
…		…
638	$rscheme = "http" unless defined $rscheme;	797	$rscheme = "http" unless defined $rscheme;
639		798
640	# don't support https requests over https-proxy transport,	799	# don't support https requests over https-proxy transport,
641	# can't be done with tls as spec'ed, unless you double-encrypt.	800	# can't be done with tls as spec'ed, unless you double-encrypt.
642	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	801	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		802
		803	$rhost = lc $rhost;
		804	$rscheme = lc $rscheme;
643	} else {	805	} else {
644	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	806	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
645	}	807	}
646		808
647	# leave out fragment and query string, just a heuristic	809	# leave out fragment and query string, just a heuristic
…		…
649	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	811	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
650		812
651	$hdr{"content-length"} = length $arg{body}	813	$hdr{"content-length"} = length $arg{body}
652	if length $arg{body} \|\| $method ne "GET";	814	if length $arg{body} \|\| $method ne "GET";
653		815
654	$hdr{connection} = "close TE"; #1.1	816	my $idempotent = $IDEMPOTENT{$method};
		817
		818	# default value for keepalive is true iff the request is for an idempotent method
		819	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
		820	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
		821	my $was_persistent; # true if this is actually a recycled connection
		822
		823	# the key to use in the keepalive cache
		824	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		825
		826	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive " : "" : "close ") . "Te"; #1.1
655	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	827	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
656		828
657	my %state = (connect_guard => 1);	829	my %state = (connect_guard => 1);
658		830
659	_get_slot $uhost, sub {
660	$state{slot_guard} = shift;
661
662	return unless $state{connect_guard};
663
664	my $ae_error = 595; # connecting	831	my $ae_error = 595; # connecting
665		832
666	# handle actual, non-tunneled, request	833	# handle actual, non-tunneled, request
667	my $handle_actual_request = sub {	834	my $handle_actual_request = sub {
668	$ae_error = 596; # request phase	835	$ae_error = 596; # request phase
669		836
		837	my $hdl = $state{handle};
		838
670	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};	839	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
671		840
672	# send request	841	# send request
673	$state{handle}->push_write (	842	$hdl->push_write (
674	"$method $rpath HTTP/1.1\015\012"	843	"$method $rpath HTTP/1.1\015\012"
675	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)	844	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
676	. "\015\012"	845	. "\015\012"
677	. (delete $arg{body})	846	. (delete $arg{body})
678	);	847	);
679		848
680	# return if error occured during push_write()	849	# return if error occurred during push_write()
		850	return unless %state;
		851
		852	# reduce memory usage, save a kitten, also re-use it for the response headers.
		853	%hdr = ();
		854
		855	# status line and headers
		856	$state{read_response} = sub {
681	return unless %state;	857	return unless %state;
682		858
683	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
684
685	# status line and headers
686	$state{read_response} = sub {
687	for ("$_[1]") {	859	for ("$_[1]") {
688	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	860	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
689		861
690	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci	862	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
691	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));	863	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
692		864
693	# 100 Continue handling	865	# 100 Continue handling
694	# should not happen as we don't send expect: 100-continue,	866	# should not happen as we don't send expect: 100-continue,
695	# but we handle it just in case.	867	# but we handle it just in case.
696	# since we send the request body regardless, if we get an error	868	# since we send the request body regardless, if we get an error
697	# we are out of-sync, which we currently do NOT handle correctly.	869	# we are out of-sync, which we currently do NOT handle correctly.
698	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})	870	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
699	if $2 eq 100;	871	if $2 eq 100;
700		872
701	push @pseudo,	873	push @pseudo,
702	HTTPVersion => $1,	874	HTTPVersion => $1,
703	Status => $2,	875	Status => $2,
704	Reason => $3,	876	Reason => $3,
705	;	877	;
706		878
707	my $hdr = parse_hdr	879	my $hdr = _parse_hdr
708	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));	880	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
709		881
710	%hdr = (%$hdr, @pseudo);	882	%hdr = (%$hdr, @pseudo);
		883	}
		884
		885	# redirect handling
		886	# microsoft and other shitheads don't give a shit for following standards,
		887	# try to support some common forms of broken Location headers.
		888	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		889	$hdr{location} =~ s/^\.\/+//;
		890
		891	my $url = "$rscheme://$uhost:$uport";
		892
		893	unless ($hdr{location} =~ s/^\///) {
		894	$url .= $upath;
		895	$url =~ s/\/[^\/]*$//;
711	}	896	}
712		897
713	# redirect handling
714	# microsoft and other shitheads don't give a shit for following standards,
715	# try to support some common forms of broken Location headers.
716	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
717	$hdr{location} =~ s/^\.\/+//;
718
719	my $url = "$rscheme://$uhost:$uport";
720
721	unless ($hdr{location} =~ s/^\///) {
722	$url .= $upath;
723	$url =~ s/\/[^\/]*$//;
724	}
725
726	$hdr{location} = "$url/$hdr{location}";	898	$hdr{location} = "$url/$hdr{location}";
		899	}
		900
		901	my $redirect;
		902
		903	if ($recurse) {
		904	my $status = $hdr{Status};
		905
		906	# industry standard is to redirect POST as GET for
		907	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		908	# also, the UA should ask the user for 301 and 307 and POST,
		909	# industry standard seems to be to simply follow.
		910	# we go with the industry standard.
		911	if ($status == 301 or $status == 302 or $status == 303) {
		912	# HTTP/1.1 is unclear on how to mutate the method
		913	$method = "GET" unless $method eq "HEAD";
		914	$redirect = 1;
		915	} elsif ($status == 307) {
		916	$redirect = 1;
727	}	917	}
		918	}
728		919
729	my $redirect;	920	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
730		921	if ($state{handle}) {
731	if ($recurse) {	922	# handle keepalive
732	my $status = $hdr{Status};	923	if (
733		924	$persistent
734	# industry standard is to redirect POST as GET for	925	&& $_[3]
735	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.	926	&& ($hdr{HTTPVersion} < 1.1
736	# also, the UA should ask the user for 301 and 307 and POST,	927	? $hdr{connection} =~ /\bkeep-?alive\b/i
737	# industry standard seems to be to simply follow.	928	: $hdr{connection} !~ /\bclose\b/i)
738	# we go with the industry standard.	929	) {
739	if ($status == 301 or $status == 302 or $status == 303) {	930	ka_store $ka_key, delete $state{handle};
740	# HTTP/1.1 is unclear on how to mutate the method	931	} else {
741	$method = "GET" unless $method eq "HEAD";	932	# no keepalive, destroy the handle
742	$redirect = 1;	933	$state{handle}->destroy;
743	} elsif ($status == 307) {
744	$redirect = 1;
745	}	934	}
746	}	935	}
747		936
748	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
749	my $may_keep_alive = $_[3];
750
751	$state{handle}->destroy if $state{handle};
752	%state = ();	937	%state = ();
753		938
754	if (defined $_[1]) {	939	if (defined $_[1]) {
755	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];	940	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
756	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];	941	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
757	}	942	}
758		943
759	# set-cookie processing	944	# set-cookie processing
760	if ($arg{cookie_jar}) {	945	if ($arg{cookie_jar}) {
761	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};	946	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
762	}	947	}
763		948
764	if ($redirect && exists $hdr{location}) {	949	if ($redirect && exists $hdr{location}) {
765	# we ignore any errors, as it is very common to receive	950	# we ignore any errors, as it is very common to receive
766	# Content-Length != 0 but no actual body	951	# Content-Length != 0 but no actual body
767	# we also access %hdr, as $_[1] might be an erro	952	# we also access %hdr, as $_[1] might be an erro
		953	$state{recurse} =
768	http_request (	954	http_request (
769	$method => $hdr{location},	955	$method => $hdr{location},
770	%arg,	956	%arg,
771	recurse => $recurse - 1,	957	recurse => $recurse - 1,
772	Redirect => [$_[0], \%hdr],	958	Redirect => [$_[0], \%hdr],
		959	sub {
		960	%state = ();
		961	&$cb
		962	},
		963	);
		964	} else {
		965	$cb->($_[0], \%hdr);
		966	}
		967	};
		968
		969	$ae_error = 597; # body phase
		970
		971	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		972
		973	my $len = $chunked ? undef : $hdr{"content-length"};
		974
		975	# body handling, many different code paths
		976	# - no body expected
		977	# - want_body_handle
		978	# - te chunked
		979	# - 2x length known (with or without on_body)
		980	# - 2x length not known (with or without on_body)
		981	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		982	$finish->(undef, 598 => "Request cancelled by on_header");
		983	} elsif (
		984	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		985	or $method eq "HEAD"
		986	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		987	) {
		988	# no body
		989	$finish->("", undef, undef, 1);
		990
		991	} elsif (!$redirect && $arg{want_body_handle}) {
		992	$_[0]->on_eof (undef);
		993	$_[0]->on_error (undef);
		994	$_[0]->on_read (undef);
		995
		996	$finish->(delete $state{handle});
		997
		998	} elsif ($chunked) {
		999	my $cl = 0;
		1000	my $body = "";
		1001	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		1002
		1003	$state{read_chunk} = sub {
		1004	$_[1] =~ /^([0-9a-fA-F]+)/
		1005	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1006
		1007	my $len = hex $1;
		1008
		1009	if ($len) {
		1010	$cl += $len;
		1011
		1012	$_[0]->push_read (chunk => $len, sub {
		1013	$on_body->($_[1], \%hdr)
		1014	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1015
		1016	$_[0]->push_read (line => sub {
		1017	length $_[1]
		1018	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1019	$_[0]->push_read (line => $state{read_chunk});
773	$cb);	1020	});
		1021	});
774	} else {	1022	} else {
775	$cb->($_[0], \%hdr);	1023	$hdr{"content-length"} \|\|= $cl;
		1024
		1025	$_[0]->push_read (line => $qr_nlnl, sub {
		1026	if (length $_[1]) {
		1027	for ("$_[1]") {
		1028	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		1029
		1030	my $hdr = _parse_hdr
		1031	or return $finish->(undef, $ae_error => "Garbled response trailers");
		1032
		1033	%hdr = (%hdr, %$hdr);
		1034	}
		1035	}
		1036
		1037	$finish->($body, undef, undef, 1);
		1038	});
776	}	1039	}
777	};	1040	};
778		1041
779	$ae_error = 597; # body phase
780
781	my $len = $hdr{"content-length"};
782	warn "no content $redirect x<$len>$hdr{Status}\n";#d#
783
784	# body handling, many different code paths
785	# - no body expected
786	# - want_body_handle
787	# - te chunked
788	# - 2x length known (with or without on_body)
789	# - 2x length not known (with or without on_body)
790	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
791	$finish->(undef, 598 => "Request cancelled by on_header");
792	} elsif (
793	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
794	or $method eq "HEAD"
795	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
796	) {
797	# no body
798	$finish->("", undef, undef, 1);
799
800	} elsif (!$redirect && $arg{want_body_handle}) {
801	$_[0]->on_eof (undef);
802	$_[0]->on_error (undef);
803	$_[0]->on_read (undef);
804
805	$finish->(delete $state{handle});
806
807	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
808	my $cl = 0;
809	my $body = undef;
810	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
811
812	$state{read_chunk} = sub {
813	$_[1] =~ /^([0-9a-fA-F]+)/
814	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
815
816	my $len = hex $1;
817
818	if ($len) {
819	$cl += $len;
820
821	$_[0]->push_read (chunk => $len, sub {
822	$on_body->($_[1], \%hdr)
823	or return $finish->(undef, 598 => "Request cancelled by on_body");
824
825	$_[0]->push_read (line => sub {
826	length $_[1]
827	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
828	$_[0]->push_read (line => $state{read_chunk});
829	});
830	});
831	} else {
832	$hdr{"content-length"} \|\|= $cl;
833
834	$_[0]->push_read (line => $qr_nlnl, sub {
835	if (length $_[1]) {
836	for ("$_[1]") {
837	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
838
839	my $hdr = parse_hdr
840	or return $finish->(undef, $ae_error => "Garbled response trailers");
841
842	%hdr = (%hdr, %$hdr);
843	}
844	}
845
846	$finish->($body, undef, undef, 1);
847	});
848	}
849	};
850
851	$_[0]->push_read (line => $state{read_chunk});	1042	$_[0]->push_read (line => $state{read_chunk});
852		1043
853	} elsif ($arg{on_body}) {	1044	} elsif ($arg{on_body}) {
854	if (defined $len) {	1045	if (defined $len) {
855	$_[0]->on_read (sub {	1046	$_[0]->on_read (sub {
856	$len -= length $_[0]{rbuf};	1047	$len -= length $_[0]{rbuf};
857		1048
858	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)	1049	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
859	or return $finish->(undef, 598 => "Request cancelled by on_body");	1050	or return $finish->(undef, 598 => "Request cancelled by on_body");
860		1051
861	$len > 0	1052	$len > 0
862	or $finish->("", undef, undef, 1);	1053	or $finish->("", undef, undef, 1);
863	});
864	} else {
865	$_[0]->on_eof (sub {
866	$finish->("");
867	});
868	$_[0]->on_read (sub {
869	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
870	or $finish->(undef, 598 => "Request cancelled by on_body");
871	});
872	}	1054	});
873	} else {	1055	} else {
874	$_[0]->on_eof (undef);	1056	$_[0]->on_eof (sub {
875		1057	$finish->("");
876	if (defined $len) {	1058	});
877	$_[0]->on_read (sub {	1059	$_[0]->on_read (sub {
878	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)	1060	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
879	if $len <= length $_[0]{rbuf};	1061	or $finish->(undef, 598 => "Request cancelled by on_body");
880	});
881	} else {
882	$_[0]->on_error (sub {
883	($! == Errno::EPIPE \|\| !$!)
884	? $finish->(delete $_[0]{rbuf})
885	: $finish->(undef, $ae_error => $_[2]);
886	});
887	$_[0]->on_read (sub { });
888	}	1062	});
889	}	1063	}
890	};
891
892	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
893	};
894
895	my $connect_cb = sub {
896	$state{fh} = shift
897	or do {
898	my $err = "$!";
899	%state = ();
900	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });
901	};
902
903	return unless delete $state{connect_guard};
904
905	# get handle
906	$state{handle} = new AnyEvent::Handle
907	fh => $state{fh},
908	peername => $rhost,
909	tls_ctx => $arg{tls_ctx},
910	# these need to be reconfigured on keepalive handles
911	timeout => $timeout,
912	on_error => sub {
913	%state = ();
914	$cb->(undef, { @pseudo, Status => $ae_error, Reason => $_[2] });
915	},
916	on_eof => sub {
917	%state = ();
918	$cb->(undef, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" });
919	},
920	;
921
922	# limit the number of persistent connections
923	# keepalive not yet supported
924	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
925	# ++$KA_COUNT{$_[1]};
926	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
927	# --$KA_COUNT{$_[1]}
928	# };
929	# $hdr{connection} = "keep-alive";
930	# }
931
932	$state{handle}->starttls ("connect") if $rscheme eq "https";
933
934	# now handle proxy-CONNECT method
935	if ($proxy && $uscheme eq "https") {
936	# oh dear, we have to wrap it into a connect request
937
938	# maybe re-use $uauthority with patched port?
939	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
940	$state{handle}->push_read (line => $qr_nlnl, sub {
941	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
942	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
943
944	if ($2 == 200) {
945	$rpath = $upath;
946	$handle_actual_request->();
947	} else {
948	%state = ();
949	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
950	}
951	});
952	} else {	1064	} else {
953	$handle_actual_request->();	1065	$_[0]->on_eof (undef);
		1066
		1067	if (defined $len) {
		1068	$_[0]->on_read (sub {
		1069	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1070	if $len <= length $_[0]{rbuf};
		1071	});
		1072	} else {
		1073	$_[0]->on_error (sub {
		1074	($! == Errno::EPIPE \|\| !$!)
		1075	? $finish->(delete $_[0]{rbuf})
		1076	: $finish->(undef, $ae_error => $_[2]);
		1077	});
		1078	$_[0]->on_read (sub { });
		1079	}
954	}	1080	}
955	};	1081	};
956		1082
957	my $tcp_connect = $arg{tcp_connect}	1083	# if keepalive is enabled, then the server closing the connection
958	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1084	# before a response can happen legally - we retry on idempotent methods.
		1085	if ($was_persistent && $idempotent) {
		1086	my $old_eof = $hdl->{on_eof};
		1087	$hdl->{on_eof} = sub {
		1088	_destroy_state %state;
959		1089
960	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });	1090	%state = ();
		1091	$state{recurse} =
		1092	http_request (
		1093	$method => $url,
		1094	%arg,
		1095	recurse => $recurse - 1,
		1096	keepalive => 0,
		1097	sub {
		1098	%state = ();
		1099	&$cb
		1100	}
		1101	);
		1102	};
		1103	$hdl->on_read (sub {
		1104	return unless %state;
		1105
		1106	# as soon as we receive something, a connection close
		1107	# once more becomes a hard error
		1108	$hdl->{on_eof} = $old_eof;
		1109	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1110	});
		1111	} else {
		1112	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1113	}
961	};	1114	};
962		1115
		1116	my $prepare_handle = sub {
		1117	my ($hdl) = $state{handle};
		1118
		1119	$hdl->on_error (sub {
		1120	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1121	});
		1122	$hdl->on_eof (sub {
		1123	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1124	});
		1125	$hdl->timeout_reset;
		1126	$hdl->timeout ($timeout);
		1127	};
		1128
		1129	# connected to proxy (or origin server)
		1130	my $connect_cb = sub {
		1131	my $fh = shift
		1132	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1133
		1134	return unless delete $state{connect_guard};
		1135
		1136	# get handle
		1137	$state{handle} = new AnyEvent::Handle
		1138	%{ $arg{handle_params} },
		1139	fh => $fh,
		1140	peername => $uhost,
		1141	tls_ctx => $arg{tls_ctx},
		1142	;
		1143
		1144	$prepare_handle->();
		1145
		1146	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1147
		1148	# now handle proxy-CONNECT method
		1149	if ($proxy && $uscheme eq "https") {
		1150	# oh dear, we have to wrap it into a connect request
		1151
		1152	# maybe re-use $uauthority with patched port?
		1153	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");
		1154	$state{handle}->push_read (line => $qr_nlnl, sub {
		1155	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1156	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1157
		1158	if ($2 == 200) {
		1159	$rpath = $upath;
		1160	$handle_actual_request->();
		1161	} else {
		1162	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1163	}
		1164	});
		1165	} else {
		1166	$handle_actual_request->();
		1167	}
		1168	};
		1169
		1170	_get_slot $uhost, sub {
		1171	$state{slot_guard} = shift;
		1172
		1173	return unless $state{connect_guard};
		1174
		1175	# try to use an existing keepalive connection, but only if we, ourselves, plan
		1176	# on a keepalive request (in theory, this should be a separate config option).
		1177	if ($persistent && $KA_CACHE{$ka_key}) {
		1178	$was_persistent = 1;
		1179
		1180	$state{handle} = ka_fetch $ka_key;
		1181	$state{handle}->destroyed
		1182	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
		1183	$prepare_handle->();
		1184	$state{handle}->destroyed
		1185	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
		1186	$handle_actual_request->();
		1187
		1188	} else {
		1189	my $tcp_connect = $arg{tcp_connect}
		1190	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		1191
		1192	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		1193	}
		1194	};
		1195
963	defined wantarray && AnyEvent::Util::guard { %state = () }	1196	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
964	}	1197	}
965		1198
966	sub http_get($@) {	1199	sub http_get($@) {
967	unshift @_, "GET";	1200	unshift @_, "GET";
968	&http_request	1201	&http_request
…		…
986	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1219	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
987	the actual connection, which in turn uses AnyEvent::DNS to resolve	1220	the actual connection, which in turn uses AnyEvent::DNS to resolve
988	hostnames. The latter is a simple stub resolver and does no caching	1221	hostnames. The latter is a simple stub resolver and does no caching
989	on its own. If you want DNS caching, you currently have to provide	1222	on its own. If you want DNS caching, you currently have to provide
990	your own default resolver (by storing a suitable resolver object in	1223	your own default resolver (by storing a suitable resolver object in
991	C<$AnyEvent::DNS::RESOLVER>).	1224	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
992		1225
993	=head2 GLOBAL FUNCTIONS AND VARIABLES	1226	=head2 GLOBAL FUNCTIONS AND VARIABLES
994		1227
995	=over 4	1228	=over 4
996		1229
997	=item AnyEvent::HTTP::set_proxy "proxy-url"	1230	=item AnyEvent::HTTP::set_proxy "proxy-url"
998		1231
999	Sets the default proxy server to use. The proxy-url must begin with a	1232	Sets the default proxy server to use. The proxy-url must begin with a
1000	string of the form C<http://host:port> (optionally C<https:...>), croaks	1233	string of the form C<http://host:port>, croaks otherwise.
1001	otherwise.
1002		1234
1003	To clear an already-set proxy, use C<undef>.	1235	To clear an already-set proxy, use C<undef>.
		1236
		1237	When AnyEvent::HTTP is loaded for the first time it will query the
		1238	default proxy from the operating system, currently by looking at
		1239	C<$ENV{http_proxy>}.
1004		1240
1005	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]	1241	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
1006		1242
1007	Remove all cookies from the cookie jar that have been expired. If	1243	Remove all cookies from the cookie jar that have been expired. If
1008	C<$session_end> is given and true, then additionally remove all session	1244	C<$session_end> is given and true, then additionally remove all session
1009	cookies.	1245	cookies.
1010		1246
1011	You should call this function (with a true C<$session_end>) before you	1247	You should call this function (with a true C<$session_end>) before you
1012	save cookies to disk, and you should call this function after loading them	1248	save cookies to disk, and you should call this function after loading them
1013	again. If you have a long-running program you can additonally call this	1249	again. If you have a long-running program you can additionally call this
1014	function from time to time.	1250	function from time to time.
1015		1251
1016	A cookie jar is initially an empty hash-reference that is managed by this	1252	A cookie jar is initially an empty hash-reference that is managed by this
1017	module. It's format is subject to change, but currently it is like this:	1253	module. It's format is subject to change, but currently it is like this:
1018		1254
1019	The key C<version> has to contain C<1>, otherwise the hash gets	1255	The key C<version> has to contain C<1>, otherwise the hash gets
1020	emptied. All other keys are hostnames or IP addresses pointing to	1256	emptied. All other keys are hostnames or IP addresses pointing to
1021	hash-references. The key for these inner hash references is the	1257	hash-references. The key for these inner hash references is the
1022	server path for which this cookie is meant, and the values are again	1258	server path for which this cookie is meant, and the values are again
1023	hash-references. The keys of those hash-references is the cookie name, and	1259	hash-references. Each key of those hash-references is a cookie name, and
1024	the value, you guessed it, is another hash-reference, this time with the	1260	the value, you guessed it, is another hash-reference, this time with the
1025	key-value pairs from the cookie, except for C<expires> and C<max-age>,	1261	key-value pairs from the cookie, except for C<expires> and C<max-age>,
1026	which have been replaced by a C<_expires> key that contains the cookie	1262	which have been replaced by a C<_expires> key that contains the cookie
1027	expiry timestamp.	1263	expiry timestamp. Session cookies are indicated by not having an
		1264	C<_expires> key.
1028		1265
1029	Here is an example of a cookie jar with a single cookie, so you have a	1266	Here is an example of a cookie jar with a single cookie, so you have a
1030	chance of understanding the above paragraph:	1267	chance of understanding the above paragraph:
1031		1268
1032	{	1269	{
…		…
1054		1291
1055	=item $AnyEvent::HTTP::MAX_RECURSE	1292	=item $AnyEvent::HTTP::MAX_RECURSE
1056		1293
1057	The default value for the C<recurse> request parameter (default: C<10>).	1294	The default value for the C<recurse> request parameter (default: C<10>).
1058		1295
		1296	=item $AnyEvent::HTTP::TIMEOUT
		1297
		1298	The default timeout for connection operations (default: C<300>).
		1299
1059	=item $AnyEvent::HTTP::USERAGENT	1300	=item $AnyEvent::HTTP::USERAGENT
1060		1301
1061	The default value for the C<User-Agent> header (the default is	1302	The default value for the C<User-Agent> header (the default is
1062	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1303	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
1063		1304
1064	=item $AnyEvent::HTTP::MAX_PER_HOST	1305	=item $AnyEvent::HTTP::MAX_PER_HOST
1065		1306
1066	The maximum number of concurrent connections to the same host (identified	1307	The maximum number of concurrent connections to the same host (identified
1067	by the hostname). If the limit is exceeded, then the additional requests	1308	by the hostname). If the limit is exceeded, then the additional requests
1068	are queued until previous connections are closed.	1309	are queued until previous connections are closed. Both persistent and
		1310	non-persistent connections are counted in this limit.
1069		1311
1070	The default value for this is C<4>, and it is highly advisable to not	1312	The default value for this is C<4>, and it is highly advisable to not
1071	increase it.	1313	increase it much.
		1314
		1315	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1316	connections, older browsers used 2, newer ones (such as firefox 3)
		1317	typically use 6, and Opera uses 8 because like, they have the fastest
		1318	browser and give a shit for everybody else on the planet.
		1319
		1320	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1321
		1322	The time after which idle persistent connections get closed by
		1323	AnyEvent::HTTP (default: C<3>).
1072		1324
1073	=item $AnyEvent::HTTP::ACTIVE	1325	=item $AnyEvent::HTTP::ACTIVE
1074		1326
1075	The number of active connections. This is not the number of currently	1327	The number of active connections. This is not the number of currently
1076	running requests, but the number of currently open and non-idle TCP	1328	running requests, but the number of currently open and non-idle TCP
1077	connections. This number of can be useful for load-leveling.	1329	connections. This number can be useful for load-leveling.
1078		1330
1079	=back	1331	=back
1080		1332
1081	=cut	1333	=cut
1082		1334
…		…
1116	# other formats fail in the loop below	1368	# other formats fail in the loop below
1117		1369
1118	for (0..11) {	1370	for (0..11) {
1119	if ($m eq $month[$_]) {	1371	if ($m eq $month[$_]) {
1120	require Time::Local;	1372	require Time::Local;
1121	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1373	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
1122	}	1374	}
1123	}	1375	}
1124		1376
1125	undef	1377	undef
1126	}	1378	}
1127		1379
1128	sub set_proxy($) {	1380	sub set_proxy($) {
1129	if (length $_[0]) {	1381	if (length $_[0]) {
1130	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1382	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1131	or Carp::croak "$_[0]: invalid proxy URL";	1383	or Carp::croak "$_[0]: invalid proxy URL";
1132	$PROXY = [$2, $3 \|\| 3128, $1]	1384	$PROXY = [$2, $3 \|\| 3128, $1]
1133	} else {	1385	} else {
1134	undef $PROXY;	1386	undef $PROXY;
1135	}	1387	}
…		…
1138	# initialise proxy from environment	1390	# initialise proxy from environment
1139	eval {	1391	eval {
1140	set_proxy $ENV{http_proxy};	1392	set_proxy $ENV{http_proxy};
1141	};	1393	};
1142		1394
		1395	=head2 SHOWCASE
		1396
		1397	This section contains some more elaborate "real-world" examples or code
		1398	snippets.
		1399
		1400	=head2 HTTP/1.1 FILE DOWNLOAD
		1401
		1402	Downloading files with HTTP can be quite tricky, especially when something
		1403	goes wrong and you want to resume.
		1404
		1405	Here is a function that initiates and resumes a download. It uses the
		1406	last modified time to check for file content changes, and works with many
		1407	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1408	on older servers.
		1409
		1410	It calls the completion callback with either C<undef>, which means a
		1411	nonretryable error occurred, C<0> when the download was partial and should
		1412	be retried, and C<1> if it was successful.
		1413
		1414	use AnyEvent::HTTP;
		1415
		1416	sub download($$$) {
		1417	my ($url, $file, $cb) = @_;
		1418
		1419	open my $fh, "+<", $file
		1420	or die "$file: $!";
		1421
		1422	my %hdr;
		1423	my $ofs = 0;
		1424
		1425	warn stat $fh;
		1426	warn -s _;
		1427	if (stat $fh and -s _) {
		1428	$ofs = -s _;
		1429	warn "-s is ", $ofs;
		1430	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1431	$hdr{"range"} = "bytes=$ofs-";
		1432	}
		1433
		1434	http_get $url,
		1435	headers => \%hdr,
		1436	on_header => sub {
		1437	my ($hdr) = @_;
		1438
		1439	if ($hdr->{Status} == 200 && $ofs) {
		1440	# resume failed
		1441	truncate $fh, $ofs = 0;
		1442	}
		1443
		1444	sysseek $fh, $ofs, 0;
		1445
		1446	1
		1447	},
		1448	on_body => sub {
		1449	my ($data, $hdr) = @_;
		1450
		1451	if ($hdr->{Status} =~ /^2/) {
		1452	length $data == syswrite $fh, $data
		1453	or return; # abort on write errors
		1454	}
		1455
		1456	1
		1457	},
		1458	sub {
		1459	my (undef, $hdr) = @_;
		1460
		1461	my $status = $hdr->{Status};
		1462
		1463	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1464	utime $fh, $time, $time;
		1465	}
		1466
		1467	if ($status == 200 \|\| $status == 206 \|\| $status == 416) {
		1468	# download ok \|\| resume ok \|\| file already fully downloaded
		1469	$cb->(1, $hdr);
		1470
		1471	} elsif ($status == 412) {
		1472	# file has changed while resuming, delete and retry
		1473	unlink $file;
		1474	$cb->(0, $hdr);
		1475
		1476	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1477	# retry later
		1478	$cb->(0, $hdr);
		1479
		1480	} else {
		1481	$cb->(undef, $hdr);
		1482	}
		1483	}
		1484	;
		1485	}
		1486
		1487	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1488	if ($_[0]) {
		1489	print "OK!\n";
		1490	} elsif (defined $_[0]) {
		1491	print "please retry later\n";
		1492	} else {
		1493	print "ERROR\n";
		1494	}
		1495	};
		1496
1143	=head2 SOCKS PROXIES	1497	=head3 SOCKS PROXIES
1144		1498
1145	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1499	Socks proxies are not directly supported by AnyEvent::HTTP. You can
1146	compile your perl to support socks, or use an external program such as	1500	compile your perl to support socks, or use an external program such as
1147	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy	1501	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
1148	transparently.	1502	transparently.

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.84 by root, Sun Jan 2 05:13:27 2011 UTC vs. Revision 1.117 by root, Mon Sep 9 21:41:43 2013 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.84 by root, Sun Jan 2 05:13:27 2011 UTC vs.
Revision 1.117 by root, Mon Sep 9 21:41:43 2013 UTC