[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 1.122 by root, Fri May 8 17:28:39 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 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 = 2.21;
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.
		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.
166		166
167	=item headers => hashref	167	=item headers => hashref
168		168
169	The request headers to use. Currently, C<http_request> may provide its own	169	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	170	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:>	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	172	(this can be suppressed by using C<undef> for these headers in which case
173	they won't be sent at all).	173	they won't be sent at all).
174		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.
		181
175	=item timeout => $seconds	182	=item timeout => $seconds
176		183
177	The time-out to use for various stages - each connect attempt will reset	184	The time-out to use for various stages - each connect attempt will reset
178	the timeout, as will read or write activity, i.e. this is not an overall	185	the timeout, as will read or write activity, i.e. this is not an overall
179	timeout.	186	timeout.
180		187
181	Default timeout is 5 minutes.	188	Default timeout is 5 minutes.
182		189
183	=item proxy => [$host, $port[, $scheme]] or undef	190	=item proxy => [$host, $port[, $scheme]] or undef
184		191
185	Use the given http proxy for all requests. If not specified, then the	192	Use the given http proxy for all requests, or no proxy if C<undef> is
186	default proxy (as specified by C<$ENV{http_proxy}>) is used.	193	used.
187		194
188	C<$scheme> must be either missing, C<http> for HTTP or C<https> for	195	C<$scheme> must be either missing or must be C<http> for HTTP.
189	HTTPS.	196
		197	If not specified, then the default proxy is used (see
		198	C<AnyEvent::HTTP::set_proxy>).
190		199
191	=item body => $string	200	=item body => $string
192		201
193	The request body, usually empty. Will be sent as-is (future versions of	202	The request body, usually empty. Will be sent as-is (future versions of
194	this module might offer more options).	203	this module might offer more options).
…		…
225	verification) TLS context.	234	verification) TLS context.
226		235
227	The default for this option is C<low>, which could be interpreted as "give	236	The default for this option is C<low>, which could be interpreted as "give
228	me the page, no matter what".	237	me the page, no matter what".
229		238
		239	See also the C<sessionid> parameter.
		240
		241	=item session => $string
		242
		243	The module might reuse connections to the same host internally. Sometimes
		244	(e.g. when using TLS), you do not want to reuse connections from other
		245	sessions. This can be achieved by setting this parameter to some unique
		246	ID (such as the address of an object storing your state data, or the TLS
		247	context) - only connections using the same unique ID will be reused.
		248
230	=item on_prepare => $callback->($fh)	249	=item on_prepare => $callback->($fh)
231		250
232	In rare cases you need to "tune" the socket before it is used to	251	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	252	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>	253	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	254	and behaves exactly the same way (e.g. it has to provide a
236	timeout). See the description for the C<$prepare_cb> argument of	255	timeout). See the description for the C<$prepare_cb> argument of
237	C<AnyEvent::Socket::tcp_connect> for details.	256	C<AnyEvent::Socket::tcp_connect> for details.
238		257
…		…
303	called. Instead of the C<$body> argument containing the body data, the	322	called. Instead of the C<$body> argument containing the body data, the
304	callback will receive the L<AnyEvent::Handle> object associated with the	323	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	324	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.	325	(e.g. status C<304>), the empty string will be passed.
307		326
308	The handle object might or might not be in TLS mode, might be connected to	327	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	328	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	329	etc., and configured in unspecified ways. The user is responsible for this
311	module anymore).	330	handle (it will not be used by this module anymore).
312		331
313	This is useful with some push-type services, where, after the initial	332	This is useful with some push-type services, where, after the initial
314	headers, an interactive protocol is used (typical example would be the	333	headers, an interactive protocol is used (typical example would be the
315	push-style twitter API which starts a JSON/XML stream).	334	push-style twitter API which starts a JSON/XML stream).
316		335
317	If you think you need this, first have a look at C<on_body>, to see if	336	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.	337	that doesn't solve your problem in a better way.
		338
		339	=item persistent => $boolean
		340
		341	Try to create/reuse a persistent connection. When this flag is set
		342	(default: true for idempotent requests, false for all others), then
		343	C<http_request> tries to re-use an existing (previously-created)
		344	persistent connection to the host and, failing that, tries to create a new
		345	one.
		346
		347	Requests failing in certain ways will be automatically retried once, which
		348	is dangerous for non-idempotent requests, which is why it defaults to off
		349	for them. The reason for this is because the bozos who designed HTTP/1.1
		350	made it impossible to distinguish between a fatal error and a normal
		351	connection timeout, so you never know whether there was a problem with
		352	your request or not.
		353
		354	When reusing an existent connection, many parameters (such as TLS context)
		355	will be ignored. See the C<session> parameter for a workaround.
		356
		357	=item keepalive => $boolean
		358
		359	Only used when C<persistent> is also true. This parameter decides whether
		360	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		361	(as opposed to only a HTTP/1.1 persistent connection).
		362
		363	The default is true, except when using a proxy, in which case it defaults
		364	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		365
		366	=item handle_params => { key => value ... }
		367
		368	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		369	constructor that is called - not all requests will create a handle, and
		370	sometimes more than one is created, so this parameter is only good for
		371	setting hints.
		372
		373	Example: set the maximum read size to 4096, to potentially conserve memory
		374	at the cost of speed.
		375
		376	handle_params => {
		377	max_read_size => 4096,
		378	},
319		379
320	=back	380	=back
321		381
322	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	382	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
323	the response body.	383	the response body.
…		…
329		389
330	Example: do a HTTP HEAD request on https://www.google.com/, use a	390	Example: do a HTTP HEAD request on https://www.google.com/, use a
331	timeout of 30 seconds.	391	timeout of 30 seconds.
332		392
333	http_request	393	http_request
334	GET => "https://www.google.com",	394	HEAD => "https://www.google.com",
		395	headers => { "user-agent" => "MySearchClient 1.0" },
335	timeout => 30,	396	timeout => 30,
336	sub {	397	sub {
337	my ($body, $hdr) = @_;	398	my ($body, $hdr) = @_;
338	use Data::Dumper;	399	use Data::Dumper;
339	print Dumper $hdr;	400	print Dumper $hdr;
…		…
349	};	410	};
350		411
351	undef $request;	412	undef $request;
352		413
353	=cut	414	=cut
		415
		416	#############################################################################
		417	# wait queue/slots
354		418
355	sub _slot_schedule;	419	sub _slot_schedule;
356	sub _slot_schedule($) {	420	sub _slot_schedule($) {
357	my $host = shift;	421	my $host = shift;
358		422
…		…
381		445
382	_slot_schedule $_[0];	446	_slot_schedule $_[0];
383	}	447	}
384		448
385	#############################################################################	449	#############################################################################
		450	# cookie handling
386		451
387	# expire cookies	452	# expire cookies
388	sub cookie_jar_expire($;$) {	453	sub cookie_jar_expire($;$) {
389	my ($jar, $session_end) = @_;	454	my ($jar, $session_end) = @_;
390		455
…		…
414	}	479	}
415	}	480	}
416		481
417	# extract cookies from jar	482	# extract cookies from jar
418	sub cookie_jar_extract($$$$) {	483	sub cookie_jar_extract($$$$) {
419	my ($jar, $uscheme, $uhost, $upath) = @_;	484	my ($jar, $scheme, $host, $path) = @_;
420
421	$uhost = lc $uhost;
422		485
423	%$jar = () if $jar->{version} != 1;	486	%$jar = () if $jar->{version} != 1;
424		487
425	my @cookies;	488	my @cookies;
426		489
427	while (my ($chost, $paths) = each %$jar) {	490	while (my ($chost, $paths) = each %$jar) {
428	next unless ref $paths;	491	next unless ref $paths;
429		492
430	if ($chost =~ /^\./) {	493	if ($chost =~ /^\./) {
431	next unless $chost eq substr $uhost, -length $chost;	494	next unless $chost eq substr $host, -length $chost;
432	} elsif ($chost =~ /\./) {	495	} elsif ($chost =~ /\./) {
433	next unless $chost eq $uhost;	496	next unless $chost eq $host;
434	} else {	497	} else {
435	next;	498	next;
436	}	499	}
437		500
438	while (my ($cpath, $cookies) = each %$paths) {	501	while (my ($cpath, $cookies) = each %$paths) {
439	next unless $cpath eq substr $upath, 0, length $cpath;	502	next unless $cpath eq substr $path, 0, length $cpath;
440		503
441	while (my ($cookie, $kv) = each %$cookies) {	504	while (my ($cookie, $kv) = each %$cookies) {
442	next if $uscheme ne "https" && exists $kv->{secure};	505	next if $scheme ne "https" && exists $kv->{secure};
443		506
444	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {	507	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
445	delete $cookies->{$cookie};	508	delete $cookies->{$cookie};
446	next;	509	next;
447	}	510	}
…		…
461	\@cookies	524	\@cookies
462	}	525	}
463		526
464	# parse set_cookie header into jar	527	# parse set_cookie header into jar
465	sub cookie_jar_set_cookie($$$$) {	528	sub cookie_jar_set_cookie($$$$) {
466	my ($jar, $set_cookie, $uhost, $date) = @_;	529	my ($jar, $set_cookie, $host, $date) = @_;
467		530
468	my $anow = int AE::now;	531	my $anow = int AE::now;
469	my $snow; # server-now	532	my $snow; # server-now
470		533
471	for ($set_cookie) {	534	for ($set_cookie) {
…		…
477	while (	540	while (
478	m{	541	m{
479	\G\s*	542	\G\s*
480	(?:	543	(?:
481	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)	544	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
482	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) ) )?	545	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^;,[:space:]]) ) )?
483	)	546	)
484	}gcxsi	547	}gcxsi
485	) {	548	) {
486	my $name = $2;	549	my $name = $2;
487	my $value = $4;	550	my $value = $4;
…		…
494	# quoted	557	# quoted
495	$value = $3;	558	$value = $3;
496	$value =~ s/\\(.)/$1/gs;	559	$value =~ s/\\(.)/$1/gs;
497	}	560	}
498		561
499	push @kv, lc $name, $value;	562	push @kv, @kv ? lc $name : $name, $value;
500		563
501	last unless /\G\s*;/gc;	564	last unless /\G\s*;/gc;
502	}	565	}
503		566
504	last unless @kv;	567	last unless @kv;
…		…
527		590
528	# this is not rfc-like and not netscape-like. go figure.	591	# this is not rfc-like and not netscape-like. go figure.
529	my $ndots = $cdom =~ y/.//;	592	my $ndots = $cdom =~ y/.//;
530	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	593	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
531	} else {	594	} else {
532	$cdom = $uhost;	595	$cdom = $host;
533	}	596	}
534		597
535	# store it	598	# store it
536	$jar->{version} = 1;	599	$jar->{version} = 1;
537	$jar->{lc $cdom}{$cpath}{$name} = \%kv;	600	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
538		601
539	redo if /\G\s*,/gc;	602	redo if /\G\s*,/gc;
540	}	603	}
541	}	604	}
542		605
		606	#############################################################################
		607	# keepalive/persistent connection cache
		608
		609	# fetch a connection from the keepalive cache
		610	sub ka_fetch($) {
		611	my $ka_key = shift;
		612
		613	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		614	delete $KA_CACHE{$ka_key}
		615	unless @{ $KA_CACHE{$ka_key} };
		616
		617	$hdl
		618	}
		619
		620	sub ka_store($$) {
		621	my ($ka_key, $hdl) = @_;
		622
		623	my $kaa = $KA_CACHE{$ka_key} \|\|= [];
		624
		625	my $destroy = sub {
		626	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		627
		628	$hdl->destroy;
		629
		630	@ka
		631	? $KA_CACHE{$ka_key} = \@ka
		632	: delete $KA_CACHE{$ka_key};
		633	};
		634
		635	# on error etc., destroy
		636	$hdl->on_error ($destroy);
		637	$hdl->on_eof ($destroy);
		638	$hdl->on_read ($destroy);
		639	$hdl->timeout ($PERSISTENT_TIMEOUT);
		640
		641	push @$kaa, $hdl;
		642	shift @$kaa while @$kaa > $MAX_PER_HOST;
		643	}
		644
		645	#############################################################################
		646	# utilities
		647
543	# continue to parse $_ for headers and place them into the arg	648	# continue to parse $_ for headers and place them into the arg
544	sub parse_hdr() {	649	sub _parse_hdr() {
545	my %hdr;	650	my %hdr;
546		651
547	# things seen, not parsed:	652	# things seen, not parsed:
548	# p3pP="NON CUR OTPi OUR NOR UNI"	653	# p3pP="NON CUR OTPi OUR NOR UNI"
549		654
…		…
563	for values %hdr;	668	for values %hdr;
564		669
565	\%hdr	670	\%hdr
566	}	671	}
567		672
		673	#############################################################################
		674	# http_get
		675
568	our $qr_nlnl = qr{(?<![^\012])\015?\012};	676	our $qr_nlnl = qr{(?<![^\012])\015?\012};
569		677
570	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	678	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
571	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	679	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		680
		681	# maybe it should just become a normal object :/
		682
		683	sub _destroy_state(\%) {
		684	my ($state) = @_;
		685
		686	$state->{handle}->destroy if $state->{handle};
		687	%$state = ();
		688	}
		689
		690	sub _error(\%$$) {
		691	my ($state, $cb, $hdr) = @_;
		692
		693	&_destroy_state ($state);
		694
		695	$cb->(undef, $hdr);
		696	()
		697	}
		698
		699	our %IDEMPOTENT = (
		700	DELETE => 1,
		701	GET => 1,
		702	HEAD => 1,
		703	OPTIONS => 1,
		704	PUT => 1,
		705	TRACE => 1,
		706
		707	ACL => 1,
		708	"BASELINE-CONTROL" => 1,
		709	BIND => 1,
		710	CHECKIN => 1,
		711	CHECKOUT => 1,
		712	COPY => 1,
		713	LABEL => 1,
		714	LINK => 1,
		715	MERGE => 1,
		716	MKACTIVITY => 1,
		717	MKCALENDAR => 1,
		718	MKCOL => 1,
		719	MKREDIRECTREF => 1,
		720	MKWORKSPACE => 1,
		721	MOVE => 1,
		722	ORDERPATCH => 1,
		723	PROPFIND => 1,
		724	PROPPATCH => 1,
		725	REBIND => 1,
		726	REPORT => 1,
		727	SEARCH => 1,
		728	UNBIND => 1,
		729	UNCHECKOUT => 1,
		730	UNLINK => 1,
		731	UNLOCK => 1,
		732	UPDATE => 1,
		733	UPDATEREDIRECTREF => 1,
		734	"VERSION-CONTROL" => 1,
		735	);
572		736
573	sub http_request($$@) {	737	sub http_request($$@) {
574	my $cb = pop;	738	my $cb = pop;
575	my ($method, $url, %arg) = @_;	739	my ($method, $url, %arg) = @_;
576		740
…		…
594	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	758	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
595		759
596	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	760	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
597	if $recurse < 0;	761	if $recurse < 0;
598		762
599	my $proxy = $arg{proxy} \|\| $PROXY;	763	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
600	my $timeout = $arg{timeout} \|\| $TIMEOUT;	764	my $timeout = $arg{timeout} \|\| $TIMEOUT;
601		765
602	my ($uscheme, $uauthority, $upath, $query, $fragment) =	766	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
603	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;	767	$url =~ m\|^([^:]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
604		768
605	$uscheme = lc $uscheme;	769	$uscheme = lc $uscheme;
606		770
607	my $uport = $uscheme eq "http" ? 80	771	my $uport = $uscheme eq "http" ? 80
608	: $uscheme eq "https" ? 443	772	: $uscheme eq "https" ? 443
609	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });	773	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
610		774
611	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	775	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
612	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	776	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
613		777
614	my $uhost = $1;	778	my $uhost = lc $1;
615	$uport = $2 if defined $2;	779	$uport = $2 if defined $2;
616		780
617	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	781	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
618	unless exists $hdr{host};	782	unless exists $hdr{host};
619		783
…		…
638	$rscheme = "http" unless defined $rscheme;	802	$rscheme = "http" unless defined $rscheme;
639		803
640	# don't support https requests over https-proxy transport,	804	# don't support https requests over https-proxy transport,
641	# can't be done with tls as spec'ed, unless you double-encrypt.	805	# can't be done with tls as spec'ed, unless you double-encrypt.
642	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	806	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		807
		808	$rhost = lc $rhost;
		809	$rscheme = lc $rscheme;
643	} else {	810	} else {
644	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	811	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
645	}	812	}
646		813
647	# leave out fragment and query string, just a heuristic	814	# leave out fragment and query string, just a heuristic
…		…
649	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	816	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
650		817
651	$hdr{"content-length"} = length $arg{body}	818	$hdr{"content-length"} = length $arg{body}
652	if length $arg{body} \|\| $method ne "GET";	819	if length $arg{body} \|\| $method ne "GET";
653		820
654	$hdr{connection} = "close TE"; #1.1	821	my $idempotent = $IDEMPOTENT{$method};
		822
		823	# default value for keepalive is true iff the request is for an idempotent method
		824	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
		825	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
		826	my $was_persistent; # true if this is actually a recycled connection
		827
		828	# the key to use in the keepalive cache
		829	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		830
		831	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
655	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	832	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
656		833
657	my %state = (connect_guard => 1);	834	my %state = (connect_guard => 1);
658		835
659	_get_slot $uhost, sub {
660	$state{slot_guard} = shift;
661
662	return unless $state{connect_guard};
663
664	my $ae_error = 595; # connecting	836	my $ae_error = 595; # connecting
665		837
666	# handle actual, non-tunneled, request	838	# handle actual, non-tunneled, request
667	my $handle_actual_request = sub {	839	my $handle_actual_request = sub {
668	$ae_error = 596; # request phase	840	$ae_error = 596; # request phase
669		841
		842	my $hdl = $state{handle};
		843
670	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};	844	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
671		845
672	# send request	846	# send request
673	$state{handle}->push_write (	847	$hdl->push_write (
674	"$method $rpath HTTP/1.1\015\012"	848	"$method $rpath HTTP/1.1\015\012"
675	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)	849	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
676	. "\015\012"	850	. "\015\012"
677	. (delete $arg{body})	851	. $arg{body}
678	);	852	);
679		853
680	# return if error occured during push_write()	854	# return if error occurred during push_write()
		855	return unless %state;
		856
		857	# reduce memory usage, save a kitten, also re-use it for the response headers.
		858	%hdr = ();
		859
		860	# status line and headers
		861	$state{read_response} = sub {
681	return unless %state;	862	return unless %state;
682		863
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]") {	864	for ("$_[1]") {
688	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	865	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
689		866
690	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci	867	/^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" }));	868	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
692		869
693	# 100 Continue handling	870	# 100 Continue handling
694	# should not happen as we don't send expect: 100-continue,	871	# should not happen as we don't send expect: 100-continue,
695	# but we handle it just in case.	872	# but we handle it just in case.
696	# since we send the request body regardless, if we get an error	873	# 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.	874	# we are out of-sync, which we currently do NOT handle correctly.
698	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})	875	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
699	if $2 eq 100;	876	if $2 eq 100;
700		877
701	push @pseudo,	878	push @pseudo,
702	HTTPVersion => $1,	879	HTTPVersion => $1,
703	Status => $2,	880	Status => $2,
704	Reason => $3,	881	Reason => $3,
705	;	882	;
706		883
707	my $hdr = parse_hdr	884	my $hdr = _parse_hdr
708	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));	885	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
709		886
710	%hdr = (%$hdr, @pseudo);	887	%hdr = (%$hdr, @pseudo);
711	}	888	}
712		889
713	# redirect handling	890	# redirect handling
714	# microsoft and other shitheads don't give a shit for following standards,	891	# relative uri handling forced by microsoft and other shitheads.
715	# try to support some common forms of broken Location headers.	892	# we give our best and fall back to URI if available.
		893	if (exists $hdr{location}) {
		894	my $loc = $hdr{location};
		895
		896	if ($loc =~ m%^//%) { # //
		897	$loc = "$rscheme:$loc";
		898
		899	} elsif ($loc eq "") {
		900	$loc = $url;
		901
716	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {	902	} elsif ($loc !~ /^(?: $ \| [^:\/?\#]+ : )/x) { # anything "simple"
717	$hdr{location} =~ s/^\.\/+//;	903	$loc =~ s/^\.\/+//;
718		904
		905	if ($loc !~ m%^[.?#]%) {
719	my $url = "$rscheme://$uhost:$uport";	906	my $prefix = "$rscheme://$uhost:$uport";
720		907
721	unless ($hdr{location} =~ s/^\///) {	908	unless ($loc =~ s/^\///) {
722	$url .= $upath;	909	$prefix .= $upath;
723	$url =~ s/\/[^\/]*$//;	910	$prefix =~ s/\/[^\/]*$//;
724	}	911	}
725		912
726	$hdr{location} = "$url/$hdr{location}";	913	$loc = "$prefix/$loc";
727	}
728		914
729	my $redirect;	915	} elsif (eval { require URI }) { # uri
		916	$loc = URI->new_abs ($loc, $url)->as_string;
730		917
731	if ($recurse) {	918	} else {
732	my $status = $hdr{Status};	919	return _error %state, $cb, { @pseudo, Status => 599, Reason => "Cannot parse Location (URI module missing)" };
733		920	#$hdr{Status} = 599;
734	# industry standard is to redirect POST as GET for	921	#$hdr{Reason} = "Unparsable Redirect (URI module missing)";
735	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
736	# also, the UA should ask the user for 301 and 307 and POST,
737	# industry standard seems to be to simply follow.
738	# we go with the industry standard.
739	if ($status == 301 or $status == 302 or $status == 303) {
740	# HTTP/1.1 is unclear on how to mutate the method
741	$method = "GET" unless $method eq "HEAD";
742	$redirect = 1;	922	#$recurse = 0;
743	} elsif ($status == 307) {
744	$redirect = 1;
745	}	923	}
746	}	924	}
747		925
748	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])	926	$hdr{location} = $loc;
749	my $may_keep_alive = $_[3];	927	}
750		928
751	$state{handle}->destroy if $state{handle};	929	my $redirect;
752	%state = ();
753		930
754	if (defined $_[1]) {	931	if ($recurse) {
755	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];	932	my $status = $hdr{Status};
756	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];	933
		934	# industry standard is to redirect POST as GET for
		935	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		936	# also, the UA should ask the user for 301 and 307 and POST,
		937	# industry standard seems to be to simply follow.
		938	# we go with the industry standard. 308 is defined
		939	# by rfc7538
		940	if ($status == 301 or $status == 302 or $status == 303) {
		941	$redirect = 1;
		942	# HTTP/1.1 is unclear on how to mutate the method
		943	unless ($method eq "HEAD") {
		944	$method = "GET";
		945	delete $arg{body};
757	}	946	}
		947	} elsif ($status == 307 or $status == 308) {
		948	$redirect = 1;
		949	}
		950	}
758		951
759	# set-cookie processing	952	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
760	if ($arg{cookie_jar}) {	953	if ($state{handle}) {
761	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};	954	# handle keepalive
		955	if (
		956	$persistent
		957	&& $_[3]
		958	&& ($hdr{HTTPVersion} < 1.1
		959	? $hdr{connection} =~ /\bkeep-?alive\b/i
		960	: $hdr{connection} !~ /\bclose\b/i)
		961	) {
		962	ka_store $ka_key, delete $state{handle};
		963	} else {
		964	# no keepalive, destroy the handle
		965	$state{handle}->destroy;
762	}	966	}
		967	}
763		968
		969	%state = ();
		970
		971	if (defined $_[1]) {
		972	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		973	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		974	}
		975
		976	# set-cookie processing
		977	if ($arg{cookie_jar}) {
		978	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		979	}
		980
764	if ($redirect && exists $hdr{location}) {	981	if ($redirect && exists $hdr{location}) {
765	# we ignore any errors, as it is very common to receive	982	# we ignore any errors, as it is very common to receive
766	# Content-Length != 0 but no actual body	983	# Content-Length != 0 but no actual body
767	# we also access %hdr, as $_[1] might be an erro	984	# we also access %hdr, as $_[1] might be an erro
		985	$state{recurse} =
768	http_request (	986	http_request (
769	$method => $hdr{location},	987	$method => $hdr{location},
770	%arg,	988	%arg,
771	recurse => $recurse - 1,	989	recurse => $recurse - 1,
772	Redirect => [$_[0], \%hdr],	990	Redirect => [$_[0], \%hdr],
		991	sub {
		992	%state = ();
		993	&$cb
		994	},
		995	);
		996	} else {
		997	$cb->($_[0], \%hdr);
		998	}
		999	};
		1000
		1001	$ae_error = 597; # body phase
		1002
		1003	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		1004
		1005	my $len = $chunked ? undef : $hdr{"content-length"};
		1006
		1007	# body handling, many different code paths
		1008	# - no body expected
		1009	# - want_body_handle
		1010	# - te chunked
		1011	# - 2x length known (with or without on_body)
		1012	# - 2x length not known (with or without on_body)
		1013	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		1014	$finish->(undef, 598 => "Request cancelled by on_header");
		1015	} elsif (
		1016	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		1017	or $method eq "HEAD"
		1018	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		1019	) {
		1020	# no body
		1021	$finish->("", undef, undef, 1);
		1022
		1023	} elsif (!$redirect && $arg{want_body_handle}) {
		1024	$_[0]->on_eof (undef);
		1025	$_[0]->on_error (undef);
		1026	$_[0]->on_read (undef);
		1027
		1028	$finish->(delete $state{handle});
		1029
		1030	} elsif ($chunked) {
		1031	my $cl = 0;
		1032	my $body = "";
		1033	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		1034
		1035	$state{read_chunk} = sub {
		1036	$_[1] =~ /^([0-9a-fA-F]+)/
		1037	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1038
		1039	my $len = hex $1;
		1040
		1041	if ($len) {
		1042	$cl += $len;
		1043
		1044	$_[0]->push_read (chunk => $len, sub {
		1045	$on_body->($_[1], \%hdr)
		1046	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1047
		1048	$_[0]->push_read (line => sub {
		1049	length $_[1]
		1050	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1051	$_[0]->push_read (line => $state{read_chunk});
773	$cb);	1052	});
		1053	});
774	} else {	1054	} else {
775	$cb->($_[0], \%hdr);	1055	$hdr{"content-length"} \|\|= $cl;
		1056
		1057	$_[0]->push_read (line => $qr_nlnl, sub {
		1058	if (length $_[1]) {
		1059	for ("$_[1]") {
		1060	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		1061
		1062	my $hdr = _parse_hdr
		1063	or return $finish->(undef, $ae_error => "Garbled response trailers");
		1064
		1065	%hdr = (%hdr, %$hdr);
		1066	}
		1067	}
		1068
		1069	$finish->($body, undef, undef, 1);
		1070	});
776	}	1071	}
777	};	1072	};
778		1073
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});	1074	$_[0]->push_read (line => $state{read_chunk});
852		1075
853	} elsif ($arg{on_body}) {	1076	} elsif ($arg{on_body}) {
854	if (defined $len) {	1077	if (defined $len) {
855	$_[0]->on_read (sub {	1078	$_[0]->on_read (sub {
856	$len -= length $_[0]{rbuf};	1079	$len -= length $_[0]{rbuf};
857		1080
858	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)	1081	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
859	or return $finish->(undef, 598 => "Request cancelled by on_body");	1082	or return $finish->(undef, 598 => "Request cancelled by on_body");
860		1083
861	$len > 0	1084	$len > 0
862	or $finish->("", undef, undef, 1);	1085	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	}	1086	});
873	} else {	1087	} else {
874	$_[0]->on_eof (undef);	1088	$_[0]->on_eof (sub {
875		1089	$finish->("");
876	if (defined $len) {	1090	});
877	$_[0]->on_read (sub {	1091	$_[0]->on_read (sub {
878	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)	1092	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
879	if $len <= length $_[0]{rbuf};	1093	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	}	1094	});
889	}	1095	}
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 {	1096	} else {
953	$handle_actual_request->();	1097	$_[0]->on_eof (undef);
		1098
		1099	if (defined $len) {
		1100	$_[0]->on_read (sub {
		1101	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1102	if $len <= length $_[0]{rbuf};
		1103	});
		1104	} else {
		1105	$_[0]->on_error (sub {
		1106	($! == Errno::EPIPE \|\| !$!)
		1107	? $finish->(delete $_[0]{rbuf})
		1108	: $finish->(undef, $ae_error => $_[2]);
		1109	});
		1110	$_[0]->on_read (sub { });
		1111	}
954	}	1112	}
955	};	1113	};
956		1114
957	my $tcp_connect = $arg{tcp_connect}	1115	# if keepalive is enabled, then the server closing the connection
958	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1116	# before a response can happen legally - we retry on idempotent methods.
		1117	if ($was_persistent && $idempotent) {
		1118	my $old_eof = $hdl->{on_eof};
		1119	$hdl->{on_eof} = sub {
		1120	_destroy_state %state;
959		1121
960	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });	1122	%state = ();
		1123	$state{recurse} =
		1124	http_request (
		1125	$method => $url,
		1126	%arg,
		1127	recurse => $recurse - 1,
		1128	keepalive => 0,
		1129	sub {
		1130	%state = ();
		1131	&$cb
		1132	}
		1133	);
		1134	};
		1135	$hdl->on_read (sub {
		1136	return unless %state;
		1137
		1138	# as soon as we receive something, a connection close
		1139	# once more becomes a hard error
		1140	$hdl->{on_eof} = $old_eof;
		1141	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1142	});
		1143	} else {
		1144	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1145	}
961	};	1146	};
962		1147
		1148	my $prepare_handle = sub {
		1149	my ($hdl) = $state{handle};
		1150
		1151	$hdl->on_error (sub {
		1152	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1153	});
		1154	$hdl->on_eof (sub {
		1155	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1156	});
		1157	$hdl->timeout_reset;
		1158	$hdl->timeout ($timeout);
		1159	};
		1160
		1161	# connected to proxy (or origin server)
		1162	my $connect_cb = sub {
		1163	my $fh = shift
		1164	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1165
		1166	return unless delete $state{connect_guard};
		1167
		1168	# get handle
		1169	$state{handle} = new AnyEvent::Handle
		1170	%{ $arg{handle_params} },
		1171	fh => $fh,
		1172	peername => $uhost,
		1173	tls_ctx => $arg{tls_ctx},
		1174	;
		1175
		1176	$prepare_handle->();
		1177
		1178	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1179
		1180	# now handle proxy-CONNECT method
		1181	if ($proxy && $uscheme eq "https") {
		1182	# oh dear, we have to wrap it into a connect request
		1183
		1184	my $auth = exists $hdr{"proxy-authorization"}
		1185	? "proxy-authorization: " . (delete $hdr{"proxy-authorization"}) . "\015\012"
		1186	: "";
		1187
		1188	# maybe re-use $uauthority with patched port?
		1189	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012$auth\015\012");
		1190	$state{handle}->push_read (line => $qr_nlnl, sub {
		1191	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1192	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1193
		1194	if ($2 == 200) {
		1195	$rpath = $upath;
		1196	$handle_actual_request->();
		1197	} else {
		1198	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1199	}
		1200	});
		1201	} else {
		1202	delete $hdr{"proxy-authorization"} unless $proxy;
		1203
		1204	$handle_actual_request->();
		1205	}
		1206	};
		1207
		1208	_get_slot $uhost, sub {
		1209	$state{slot_guard} = shift;
		1210
		1211	return unless $state{connect_guard};
		1212
		1213	# try to use an existing keepalive connection, but only if we, ourselves, plan
		1214	# on a keepalive request (in theory, this should be a separate config option).
		1215	if ($persistent && $KA_CACHE{$ka_key}) {
		1216	$was_persistent = 1;
		1217
		1218	$state{handle} = ka_fetch $ka_key;
		1219	$state{handle}->destroyed
		1220	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
		1221	$prepare_handle->();
		1222	$state{handle}->destroyed
		1223	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
		1224	$handle_actual_request->();
		1225
		1226	} else {
		1227	my $tcp_connect = $arg{tcp_connect}
		1228	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		1229
		1230	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		1231	}
		1232	};
		1233
963	defined wantarray && AnyEvent::Util::guard { %state = () }	1234	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
964	}	1235	}
965		1236
966	sub http_get($@) {	1237	sub http_get($@) {
967	unshift @_, "GET";	1238	unshift @_, "GET";
968	&http_request	1239	&http_request
…		…
986	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1257	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
987	the actual connection, which in turn uses AnyEvent::DNS to resolve	1258	the actual connection, which in turn uses AnyEvent::DNS to resolve
988	hostnames. The latter is a simple stub resolver and does no caching	1259	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	1260	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	1261	your own default resolver (by storing a suitable resolver object in
991	C<$AnyEvent::DNS::RESOLVER>).	1262	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
992		1263
993	=head2 GLOBAL FUNCTIONS AND VARIABLES	1264	=head2 GLOBAL FUNCTIONS AND VARIABLES
994		1265
995	=over 4	1266	=over 4
996		1267
997	=item AnyEvent::HTTP::set_proxy "proxy-url"	1268	=item AnyEvent::HTTP::set_proxy "proxy-url"
998		1269
999	Sets the default proxy server to use. The proxy-url must begin with a	1270	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	1271	string of the form C<http://host:port>, croaks otherwise.
1001	otherwise.
1002		1272
1003	To clear an already-set proxy, use C<undef>.	1273	To clear an already-set proxy, use C<undef>.
		1274
		1275	When AnyEvent::HTTP is loaded for the first time it will query the
		1276	default proxy from the operating system, currently by looking at
		1277	C<$ENV{http_proxy>}.
1004		1278
1005	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]	1279	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
1006		1280
1007	Remove all cookies from the cookie jar that have been expired. If	1281	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	1282	C<$session_end> is given and true, then additionally remove all session
1009	cookies.	1283	cookies.
1010		1284
1011	You should call this function (with a true C<$session_end>) before you	1285	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	1286	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	1287	again. If you have a long-running program you can additionally call this
1014	function from time to time.	1288	function from time to time.
1015		1289
1016	A cookie jar is initially an empty hash-reference that is managed by this	1290	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:	1291	module. Its format is subject to change, but currently it is as follows:
1018		1292
1019	The key C<version> has to contain C<1>, otherwise the hash gets	1293	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	1294	emptied. All other keys are hostnames or IP addresses pointing to
1021	hash-references. The key for these inner hash references is the	1295	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	1296	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	1297	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	1298	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>,	1299	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	1300	which have been replaced by a C<_expires> key that contains the cookie
1027	expiry timestamp.	1301	expiry timestamp. Session cookies are indicated by not having an
		1302	C<_expires> key.
1028		1303
1029	Here is an example of a cookie jar with a single cookie, so you have a	1304	Here is an example of a cookie jar with a single cookie, so you have a
1030	chance of understanding the above paragraph:	1305	chance of understanding the above paragraph:
1031		1306
1032	{	1307	{
…		…
1054		1329
1055	=item $AnyEvent::HTTP::MAX_RECURSE	1330	=item $AnyEvent::HTTP::MAX_RECURSE
1056		1331
1057	The default value for the C<recurse> request parameter (default: C<10>).	1332	The default value for the C<recurse> request parameter (default: C<10>).
1058		1333
		1334	=item $AnyEvent::HTTP::TIMEOUT
		1335
		1336	The default timeout for connection operations (default: C<300>).
		1337
1059	=item $AnyEvent::HTTP::USERAGENT	1338	=item $AnyEvent::HTTP::USERAGENT
1060		1339
1061	The default value for the C<User-Agent> header (the default is	1340	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)>).	1341	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
1063		1342
1064	=item $AnyEvent::HTTP::MAX_PER_HOST	1343	=item $AnyEvent::HTTP::MAX_PER_HOST
1065		1344
1066	The maximum number of concurrent connections to the same host (identified	1345	The maximum number of concurrent connections to the same host (identified
1067	by the hostname). If the limit is exceeded, then the additional requests	1346	by the hostname). If the limit is exceeded, then additional requests
1068	are queued until previous connections are closed.	1347	are queued until previous connections are closed. Both persistent and
		1348	non-persistent connections are counted in this limit.
1069		1349
1070	The default value for this is C<4>, and it is highly advisable to not	1350	The default value for this is C<4>, and it is highly advisable to not
1071	increase it.	1351	increase it much.
		1352
		1353	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1354	connections, older browsers used 2, newer ones (such as firefox 3)
		1355	typically use 6, and Opera uses 8 because like, they have the fastest
		1356	browser and give a shit for everybody else on the planet.
		1357
		1358	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1359
		1360	The time after which idle persistent connections get closed by
		1361	AnyEvent::HTTP (default: C<3>).
1072		1362
1073	=item $AnyEvent::HTTP::ACTIVE	1363	=item $AnyEvent::HTTP::ACTIVE
1074		1364
1075	The number of active connections. This is not the number of currently	1365	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	1366	running requests, but the number of currently open and non-idle TCP
1077	connections. This number of can be useful for load-leveling.	1367	connections. This number can be useful for load-leveling.
1078		1368
1079	=back	1369	=back
1080		1370
1081	=cut	1371	=cut
1082		1372
…		…
1116	# other formats fail in the loop below	1406	# other formats fail in the loop below
1117		1407
1118	for (0..11) {	1408	for (0..11) {
1119	if ($m eq $month[$_]) {	1409	if ($m eq $month[$_]) {
1120	require Time::Local;	1410	require Time::Local;
1121	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1411	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
1122	}	1412	}
1123	}	1413	}
1124		1414
1125	undef	1415	undef
1126	}	1416	}
1127		1417
1128	sub set_proxy($) {	1418	sub set_proxy($) {
1129	if (length $_[0]) {	1419	if (length $_[0]) {
1130	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1420	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1131	or Carp::croak "$_[0]: invalid proxy URL";	1421	or Carp::croak "$_[0]: invalid proxy URL";
1132	$PROXY = [$2, $3 \|\| 3128, $1]	1422	$PROXY = [$2, $3 \|\| 3128, $1]
1133	} else {	1423	} else {
1134	undef $PROXY;	1424	undef $PROXY;
1135	}	1425	}
…		…
1138	# initialise proxy from environment	1428	# initialise proxy from environment
1139	eval {	1429	eval {
1140	set_proxy $ENV{http_proxy};	1430	set_proxy $ENV{http_proxy};
1141	};	1431	};
1142		1432
		1433	=head2 SHOWCASE
		1434
		1435	This section contains some more elaborate "real-world" examples or code
		1436	snippets.
		1437
		1438	=head2 HTTP/1.1 FILE DOWNLOAD
		1439
		1440	Downloading files with HTTP can be quite tricky, especially when something
		1441	goes wrong and you want to resume.
		1442
		1443	Here is a function that initiates and resumes a download. It uses the
		1444	last modified time to check for file content changes, and works with many
		1445	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1446	on older servers.
		1447
		1448	It calls the completion callback with either C<undef>, which means a
		1449	nonretryable error occurred, C<0> when the download was partial and should
		1450	be retried, and C<1> if it was successful.
		1451
		1452	use AnyEvent::HTTP;
		1453
		1454	sub download($$$) {
		1455	my ($url, $file, $cb) = @_;
		1456
		1457	open my $fh, "+<", $file
		1458	or die "$file: $!";
		1459
		1460	my %hdr;
		1461	my $ofs = 0;
		1462
		1463	warn stat $fh;
		1464	warn -s _;
		1465	if (stat $fh and -s _) {
		1466	$ofs = -s _;
		1467	warn "-s is ", $ofs;
		1468	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1469	$hdr{"range"} = "bytes=$ofs-";
		1470	}
		1471
		1472	http_get $url,
		1473	headers => \%hdr,
		1474	on_header => sub {
		1475	my ($hdr) = @_;
		1476
		1477	if ($hdr->{Status} == 200 && $ofs) {
		1478	# resume failed
		1479	truncate $fh, $ofs = 0;
		1480	}
		1481
		1482	sysseek $fh, $ofs, 0;
		1483
		1484	1
		1485	},
		1486	on_body => sub {
		1487	my ($data, $hdr) = @_;
		1488
		1489	if ($hdr->{Status} =~ /^2/) {
		1490	length $data == syswrite $fh, $data
		1491	or return; # abort on write errors
		1492	}
		1493
		1494	1
		1495	},
		1496	sub {
		1497	my (undef, $hdr) = @_;
		1498
		1499	my $status = $hdr->{Status};
		1500
		1501	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1502	utime $fh, $time, $time;
		1503	}
		1504
		1505	if ($status == 200 \|\| $status == 206 \|\| $status == 416) {
		1506	# download ok \|\| resume ok \|\| file already fully downloaded
		1507	$cb->(1, $hdr);
		1508
		1509	} elsif ($status == 412) {
		1510	# file has changed while resuming, delete and retry
		1511	unlink $file;
		1512	$cb->(0, $hdr);
		1513
		1514	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1515	# retry later
		1516	$cb->(0, $hdr);
		1517
		1518	} else {
		1519	$cb->(undef, $hdr);
		1520	}
		1521	}
		1522	;
		1523	}
		1524
		1525	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1526	if ($_[0]) {
		1527	print "OK!\n";
		1528	} elsif (defined $_[0]) {
		1529	print "please retry later\n";
		1530	} else {
		1531	print "ERROR\n";
		1532	}
		1533	};
		1534
1143	=head2 SOCKS PROXIES	1535	=head3 SOCKS PROXIES
1144		1536
1145	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1537	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	1538	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	1539	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
1148	transparently.	1540	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 1.122 by root, Fri May 8 17:28:39 2015 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 1.122 by root, Fri May 8 17:28:39 2015 UTC