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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.85 by root, Sun Jan 2 05:31:56 2011 UTC vs.
Revision 1.116 by root, Fri May 17 07:19:23 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
…		…
46	use AnyEvent::Util ();	46	use AnyEvent::Util ();
47	use AnyEvent::Handle ();	47	use AnyEvent::Handle ();
48		48
49	use base Exporter::;	49	use base Exporter::;
50		50
51	our $VERSION = '1.5';	51	our $VERSION = '2.15';
52		52
53	our @EXPORT = qw(http_get http_post http_head http_request);	53	our @EXPORT = qw(http_get http_post http_head http_request);
54		54
55	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)";
56	our $MAX_RECURSE = 10;	56	our $MAX_RECURSE = 10;
57	our $MAX_PERSISTENT = 8;
58	our $PERSISTENT_TIMEOUT = 2;	57	our $PERSISTENT_TIMEOUT = 3;
59	our $TIMEOUT = 300;	58	our $TIMEOUT = 300;
60		59	our $MAX_PER_HOST = 4; # changing this is evil
61	# changing these is evil
62	our $MAX_PERSISTENT_PER_HOST = 0;
63	our $MAX_PER_HOST = 4;
64		60
65	our $PROXY;	61	our $PROXY;
66	our $ACTIVE = 0;	62	our $ACTIVE = 0;
67		63
68	my %KA_COUNT; # number of open keep-alive connections per host	64	my %KA_CACHE; # indexed by uhost currently, points to [$handle...] array
69	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
70		66
71	=item http_get $url, key => value..., $cb->($data, $headers)	67	=item http_get $url, key => value..., $cb->($data, $headers)
72		68
73	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
…		…
127	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
128	message. Currently the following status codes are used:	124	message. Currently the following status codes are used:
129		125
130	=over 4	126	=over 4
131		127
132	=item 595 - errors during connection etsbalishment, proxy handshake.	128	=item 595 - errors during connection establishment, proxy handshake.
133		129
134	=item 596 - errors during TLS negotiation, request sending and header processing.	130	=item 596 - errors during TLS negotiation, request sending and header processing.
135		131
136	=item 597 - errors during body receiving or processing.	132	=item 597 - errors during body receiving or processing.
137		133
…		…
158		154
159	=over 4	155	=over 4
160		156
161	=item recurse => $count (default: $MAX_RECURSE)	157	=item recurse => $count (default: $MAX_RECURSE)
162		158
163	Whether to recurse requests or not, e.g. on redirects, authentication	159	Whether to recurse requests or not, e.g. on redirects, authentication and
164	retries and so on, and how often to do so.	160	other retries and so on, and how often to do so.
165		161
166	=item headers => hashref	162	=item headers => hashref
167		163
168	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
169	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
170	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:>
171	(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
172	they won't be sent at all).	168	they won't be sent at all).
173		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
174	=item timeout => $seconds	177	=item timeout => $seconds
175		178
176	The time-out to use for various stages - each connect attempt will reset	179	The time-out to use for various stages - each connect attempt will reset
177	the timeout, as will read or write activity, i.e. this is not an overall	180	the timeout, as will read or write activity, i.e. this is not an overall
178	timeout.	181	timeout.
179		182
180	Default timeout is 5 minutes.	183	Default timeout is 5 minutes.
181		184
182	=item proxy => [$host, $port[, $scheme]] or undef	185	=item proxy => [$host, $port[, $scheme]] or undef
183		186
184	Use the given http proxy for all requests. If not specified, then the	187	Use the given http proxy for all requests, or no proxy if C<undef> is
185	default proxy (as specified by C<$ENV{http_proxy}>) is used.	188	used.
186		189
187	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.
188	HTTPS.	191
		192	If not specified, then the default proxy is used (see
		193	C<AnyEvent::HTTP::set_proxy>).
189		194
190	=item body => $string	195	=item body => $string
191		196
192	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
193	this module might offer more options).	198	this module might offer more options).
…		…
223	verification, highest compatibility) and high-security (CA and common-name	228	verification, highest compatibility) and high-security (CA and common-name
224	verification) TLS context.	229	verification) TLS context.
225		230
226	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
227	me the page, no matter what".	232	me the page, no matter what".
		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.
228		243
229	=item on_prepare => $callback->($fh)	244	=item on_prepare => $callback->($fh)
230		245
231	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
232	connect (for exmaple, to bind it on a given IP address). This parameter	247	connect (for exmaple, to bind it on a given IP address). This parameter
…		…
302	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
303	callback will receive the L<AnyEvent::Handle> object associated with the	318	callback will receive the L<AnyEvent::Handle> object associated with the
304	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
305	(e.g. status C<304>), the empty string will be passed.	320	(e.g. status C<304>), the empty string will be passed.
306		321
307	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
308	a proxy, be a persistent connection etc., and configured in unspecified	323	to a proxy, be a persistent connection, use chunked transfer encoding
309	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
310	module anymore).	325	handle (it will not be used by this module anymore).
311		326
312	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
313	headers, an interactive protocol is used (typical example would be the	328	headers, an interactive protocol is used (typical example would be the
314	push-style twitter API which starts a JSON/XML stream).	329	push-style twitter API which starts a JSON/XML stream).
315		330
316	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
317	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 => $boolean
		353
		354	Only used when C<persistent> is also true. This parameter decides whether
		355	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		356	(as opposed to only a HTTP/1.1 persistent connection).
		357
		358	The default is true, except when using a proxy, in which case it defaults
		359	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		360
		361	=item handle_params => { key => value ... }
		362
		363	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		364	constructor that is called - not all requests will create a handle, and
		365	sometimes more than one is created, so this parameter is only good for
		366	setting hints.
		367
		368	Example: set the maximum read size to 4096, to potentially conserve memory
		369	at the cost of speed.
		370
		371	handle_params => {
		372	max_read_size => 4096,
		373	},
318		374
319	=back	375	=back
320		376
321	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	377	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
322	the response body.	378	the response body.
…		…
328		384
329	Example: do a HTTP HEAD request on https://www.google.com/, use a	385	Example: do a HTTP HEAD request on https://www.google.com/, use a
330	timeout of 30 seconds.	386	timeout of 30 seconds.
331		387
332	http_request	388	http_request
333	GET => "https://www.google.com",	389	HEAD => "https://www.google.com",
		390	headers => { "user-agent" => "MySearchClient 1.0" },
334	timeout => 30,	391	timeout => 30,
335	sub {	392	sub {
336	my ($body, $hdr) = @_;	393	my ($body, $hdr) = @_;
337	use Data::Dumper;	394	use Data::Dumper;
338	print Dumper $hdr;	395	print Dumper $hdr;
…		…
348	};	405	};
349		406
350	undef $request;	407	undef $request;
351		408
352	=cut	409	=cut
		410
		411	#############################################################################
		412	# wait queue/slots
353		413
354	sub _slot_schedule;	414	sub _slot_schedule;
355	sub _slot_schedule($) {	415	sub _slot_schedule($) {
356	my $host = shift;	416	my $host = shift;
357		417
…		…
380		440
381	_slot_schedule $_[0];	441	_slot_schedule $_[0];
382	}	442	}
383		443
384	#############################################################################	444	#############################################################################
		445	# cookie handling
385		446
386	# expire cookies	447	# expire cookies
387	sub cookie_jar_expire($;$) {	448	sub cookie_jar_expire($;$) {
388	my ($jar, $session_end) = @_;	449	my ($jar, $session_end) = @_;
389		450
…		…
413	}	474	}
414	}	475	}
415		476
416	# extract cookies from jar	477	# extract cookies from jar
417	sub cookie_jar_extract($$$$) {	478	sub cookie_jar_extract($$$$) {
418	my ($jar, $uscheme, $uhost, $upath) = @_;	479	my ($jar, $scheme, $host, $path) = @_;
419
420	$uhost = lc $uhost;
421		480
422	%$jar = () if $jar->{version} != 1;	481	%$jar = () if $jar->{version} != 1;
423		482
424	my @cookies;	483	my @cookies;
425		484
426	while (my ($chost, $paths) = each %$jar) {	485	while (my ($chost, $paths) = each %$jar) {
427	next unless ref $paths;	486	next unless ref $paths;
428		487
429	if ($chost =~ /^\./) {	488	if ($chost =~ /^\./) {
430	next unless $chost eq substr $uhost, -length $chost;	489	next unless $chost eq substr $host, -length $chost;
431	} elsif ($chost =~ /\./) {	490	} elsif ($chost =~ /\./) {
432	next unless $chost eq $uhost;	491	next unless $chost eq $host;
433	} else {	492	} else {
434	next;	493	next;
435	}	494	}
436		495
437	while (my ($cpath, $cookies) = each %$paths) {	496	while (my ($cpath, $cookies) = each %$paths) {
438	next unless $cpath eq substr $upath, 0, length $cpath;	497	next unless $cpath eq substr $path, 0, length $cpath;
439		498
440	while (my ($cookie, $kv) = each %$cookies) {	499	while (my ($cookie, $kv) = each %$cookies) {
441	next if $uscheme ne "https" && exists $kv->{secure};	500	next if $scheme ne "https" && exists $kv->{secure};
442		501
443	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {	502	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
444	delete $cookies->{$cookie};	503	delete $cookies->{$cookie};
445	next;	504	next;
446	}	505	}
…		…
460	\@cookies	519	\@cookies
461	}	520	}
462		521
463	# parse set_cookie header into jar	522	# parse set_cookie header into jar
464	sub cookie_jar_set_cookie($$$$) {	523	sub cookie_jar_set_cookie($$$$) {
465	my ($jar, $set_cookie, $uhost, $date) = @_;	524	my ($jar, $set_cookie, $host, $date) = @_;
466		525
467	my $anow = int AE::now;	526	my $anow = int AE::now;
468	my $snow; # server-now	527	my $snow; # server-now
469		528
470	for ($set_cookie) {	529	for ($set_cookie) {
…		…
476	while (	535	while (
477	m{	536	m{
478	\G\s*	537	\G\s*
479	(?:	538	(?:
480	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)	539	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
481	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) ) )?	540	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^;,[:space:]]) ) )?
482	)	541	)
483	}gcxsi	542	}gcxsi
484	) {	543	) {
485	my $name = $2;	544	my $name = $2;
486	my $value = $4;	545	my $value = $4;
…		…
493	# quoted	552	# quoted
494	$value = $3;	553	$value = $3;
495	$value =~ s/\\(.)/$1/gs;	554	$value =~ s/\\(.)/$1/gs;
496	}	555	}
497		556
498	push @kv, lc $name, $value;	557	push @kv, @kv ? lc $name : $name, $value;
499		558
500	last unless /\G\s*;/gc;	559	last unless /\G\s*;/gc;
501	}	560	}
502		561
503	last unless @kv;	562	last unless @kv;
…		…
526		585
527	# this is not rfc-like and not netscape-like. go figure.	586	# this is not rfc-like and not netscape-like. go figure.
528	my $ndots = $cdom =~ y/.//;	587	my $ndots = $cdom =~ y/.//;
529	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	588	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
530	} else {	589	} else {
531	$cdom = $uhost;	590	$cdom = $host;
532	}	591	}
533		592
534	# store it	593	# store it
535	$jar->{version} = 1;	594	$jar->{version} = 1;
536	$jar->{lc $cdom}{$cpath}{$name} = \%kv;	595	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
537		596
538	redo if /\G\s*,/gc;	597	redo if /\G\s*,/gc;
539	}	598	}
540	}	599	}
541		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
542	# continue to parse $_ for headers and place them into the arg	643	# continue to parse $_ for headers and place them into the arg
543	sub parse_hdr() {	644	sub _parse_hdr() {
544	my %hdr;	645	my %hdr;
545		646
546	# things seen, not parsed:	647	# things seen, not parsed:
547	# p3pP="NON CUR OTPi OUR NOR UNI"	648	# p3pP="NON CUR OTPi OUR NOR UNI"
548		649
…		…
562	for values %hdr;	663	for values %hdr;
563		664
564	\%hdr	665	\%hdr
565	}	666	}
566		667
		668	#############################################################################
		669	# http_get
		670
567	our $qr_nlnl = qr{(?<![^\012])\015?\012};	671	our $qr_nlnl = qr{(?<![^\012])\015?\012};
568		672
569	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	673	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
570	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(\%$$) {
		686	my ($state, $cb, $hdr) = @_;
		687
		688	&_destroy_state ($state);
		689
		690	$cb->(undef, $hdr);
		691	()
		692	}
		693
		694	our %IDEMPOTENT = (
		695	DELETE => 1,
		696	GET => 1,
		697	HEAD => 1,
		698	OPTIONS => 1,
		699	PUT => 1,
		700	TRACE => 1,
		701
		702	ACL => 1,
		703	"BASELINE-CONTROL" => 1,
		704	BIND => 1,
		705	CHECKIN => 1,
		706	CHECKOUT => 1,
		707	COPY => 1,
		708	LABEL => 1,
		709	LINK => 1,
		710	MERGE => 1,
		711	MKACTIVITY => 1,
		712	MKCALENDAR => 1,
		713	MKCOL => 1,
		714	MKREDIRECTREF => 1,
		715	MKWORKSPACE => 1,
		716	MOVE => 1,
		717	ORDERPATCH => 1,
		718	PROPFIND => 1,
		719	PROPPATCH => 1,
		720	REBIND => 1,
		721	REPORT => 1,
		722	SEARCH => 1,
		723	UNBIND => 1,
		724	UNCHECKOUT => 1,
		725	UNLINK => 1,
		726	UNLOCK => 1,
		727	UPDATE => 1,
		728	UPDATEREDIRECTREF => 1,
		729	"VERSION-CONTROL" => 1,
		730	);
571		731
572	sub http_request($$@) {	732	sub http_request($$@) {
573	my $cb = pop;	733	my $cb = pop;
574	my ($method, $url, %arg) = @_;	734	my ($method, $url, %arg) = @_;
575		735
…		…
593	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	753	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
594		754
595	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	755	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
596	if $recurse < 0;	756	if $recurse < 0;
597		757
598	my $proxy = $arg{proxy} \|\| $PROXY;	758	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
599	my $timeout = $arg{timeout} \|\| $TIMEOUT;	759	my $timeout = $arg{timeout} \|\| $TIMEOUT;
600		760
601	my ($uscheme, $uauthority, $upath, $query, $fragment) =	761	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
602	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;	762	$url =~ m\|^([^:]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
603		763
604	$uscheme = lc $uscheme;	764	$uscheme = lc $uscheme;
605		765
606	my $uport = $uscheme eq "http" ? 80	766	my $uport = $uscheme eq "http" ? 80
607	: $uscheme eq "https" ? 443	767	: $uscheme eq "https" ? 443
608	: 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" });
609		769
610	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	770	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
611	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	771	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
612		772
613	my $uhost = $1;	773	my $uhost = lc $1;
614	$uport = $2 if defined $2;	774	$uport = $2 if defined $2;
615		775
616	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	776	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
617	unless exists $hdr{host};	777	unless exists $hdr{host};
618		778
…		…
637	$rscheme = "http" unless defined $rscheme;	797	$rscheme = "http" unless defined $rscheme;
638		798
639	# don't support https requests over https-proxy transport,	799	# don't support https requests over https-proxy transport,
640	# 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.
641	$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;
642	} else {	805	} else {
643	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	806	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
644	}	807	}
645		808
646	# leave out fragment and query string, just a heuristic	809	# leave out fragment and query string, just a heuristic
…		…
648	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	811	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
649		812
650	$hdr{"content-length"} = length $arg{body}	813	$hdr{"content-length"} = length $arg{body}
651	if length $arg{body} \|\| $method ne "GET";	814	if length $arg{body} \|\| $method ne "GET";
652		815
653	$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
654	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	827	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
655		828
656	my %state = (connect_guard => 1);	829	my %state = (connect_guard => 1);
657		830
658	_get_slot $uhost, sub {
659	$state{slot_guard} = shift;
660
661	return unless $state{connect_guard};
662
663	my $ae_error = 595; # connecting	831	my $ae_error = 595; # connecting
664		832
665	# handle actual, non-tunneled, request	833	# handle actual, non-tunneled, request
666	my $handle_actual_request = sub {	834	my $handle_actual_request = sub {
667	$ae_error = 596; # request phase	835	$ae_error = 596; # request phase
668		836
		837	my $hdl = $state{handle};
		838
669	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};	839	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
670		840
671	# send request	841	# send request
672	$state{handle}->push_write (	842	$hdl->push_write (
673	"$method $rpath HTTP/1.1\015\012"	843	"$method $rpath HTTP/1.1\015\012"
674	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)	844	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
675	. "\015\012"	845	. "\015\012"
676	. (delete $arg{body})	846	. (delete $arg{body})
677	);	847	);
678		848
679	# return if error occured during push_write()	849	# return if error occured 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 {
680	return unless %state;	857	return unless %state;
681		858
682	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
683
684	# status line and headers
685	$state{read_response} = sub {
686	for ("$_[1]") {	859	for ("$_[1]") {
687	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.
688		861
689	/^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
690	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" };
691		864
692	# 100 Continue handling	865	# 100 Continue handling
693	# should not happen as we don't send expect: 100-continue,	866	# should not happen as we don't send expect: 100-continue,
694	# but we handle it just in case.	867	# but we handle it just in case.
695	# 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
696	# 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.
697	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})	870	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
698	if $2 eq 100;	871	if $2 eq 100;
699		872
700	push @pseudo,	873	push @pseudo,
701	HTTPVersion => $1,	874	HTTPVersion => $1,
702	Status => $2,	875	Status => $2,
703	Reason => $3,	876	Reason => $3,
704	;	877	;
705		878
706	my $hdr = parse_hdr	879	my $hdr = _parse_hdr
707	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" };
708		881
709	%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/\/[^\/]*$//;
710	}	896	}
711		897
712	# redirect handling
713	# microsoft and other shitheads don't give a shit for following standards,
714	# try to support some common forms of broken Location headers.
715	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
716	$hdr{location} =~ s/^\.\/+//;
717
718	my $url = "$rscheme://$uhost:$uport";
719
720	unless ($hdr{location} =~ s/^\///) {
721	$url .= $upath;
722	$url =~ s/\/[^\/]*$//;
723	}
724
725	$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;
726	}	917	}
		918	}
727		919
728	my $redirect;	920	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
729		921	if ($state{handle}) {
730	if ($recurse) {	922	# handle keepalive
731	my $status = $hdr{Status};	923	if (
732		924	$persistent
733	# industry standard is to redirect POST as GET for	925	&& $_[3]
734	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.	926	&& ($hdr{HTTPVersion} < 1.1
735	# also, the UA should ask the user for 301 and 307 and POST,	927	? $hdr{connection} =~ /\bkeep-?alive\b/i
736	# industry standard seems to be to simply follow.	928	: $hdr{connection} !~ /\bclose\b/i)
737	# we go with the industry standard.	929	) {
738	if ($status == 301 or $status == 302 or $status == 303) {	930	ka_store $ka_key, delete $state{handle};
739	# HTTP/1.1 is unclear on how to mutate the method	931	} else {
740	$method = "GET" unless $method eq "HEAD";	932	# no keepalive, destroy the handle
741	$redirect = 1;	933	$state{handle}->destroy;
742	} elsif ($status == 307) {
743	$redirect = 1;
744	}	934	}
745	}	935	}
746		936
747	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
748	my $may_keep_alive = $_[3];
749
750	$state{handle}->destroy if $state{handle};
751	%state = ();	937	%state = ();
752		938
753	if (defined $_[1]) {	939	if (defined $_[1]) {
754	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];	940	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
755	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];	941	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
756	}	942	}
757		943
758	# set-cookie processing	944	# set-cookie processing
759	if ($arg{cookie_jar}) {	945	if ($arg{cookie_jar}) {
760	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};
761	}	947	}
762		948
763	if ($redirect && exists $hdr{location}) {	949	if ($redirect && exists $hdr{location}) {
764	# we ignore any errors, as it is very common to receive	950	# we ignore any errors, as it is very common to receive
765	# Content-Length != 0 but no actual body	951	# Content-Length != 0 but no actual body
766	# we also access %hdr, as $_[1] might be an erro	952	# we also access %hdr, as $_[1] might be an erro
		953	$state{recurse} =
767	http_request (	954	http_request (
768	$method => $hdr{location},	955	$method => $hdr{location},
769	%arg,	956	%arg,
770	recurse => $recurse - 1,	957	recurse => $recurse - 1,
771	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});
772	$cb);	1020	});
		1021	});
773	} else {	1022	} else {
774	$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	});
775	}	1039	}
776	};	1040	};
777		1041
778	$ae_error = 597; # body phase
779
780	my $len = $hdr{"content-length"};
781
782	# body handling, many different code paths
783	# - no body expected
784	# - want_body_handle
785	# - te chunked
786	# - 2x length known (with or without on_body)
787	# - 2x length not known (with or without on_body)
788	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
789	$finish->(undef, 598 => "Request cancelled by on_header");
790	} elsif (
791	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
792	or $method eq "HEAD"
793	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
794	) {
795	# no body
796	$finish->("", undef, undef, 1);
797
798	} elsif (!$redirect && $arg{want_body_handle}) {
799	$_[0]->on_eof (undef);
800	$_[0]->on_error (undef);
801	$_[0]->on_read (undef);
802
803	$finish->(delete $state{handle});
804
805	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
806	my $cl = 0;
807	my $body = undef;
808	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
809
810	$state{read_chunk} = sub {
811	$_[1] =~ /^([0-9a-fA-F]+)/
812	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
813
814	my $len = hex $1;
815
816	if ($len) {
817	$cl += $len;
818
819	$_[0]->push_read (chunk => $len, sub {
820	$on_body->($_[1], \%hdr)
821	or return $finish->(undef, 598 => "Request cancelled by on_body");
822
823	$_[0]->push_read (line => sub {
824	length $_[1]
825	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
826	$_[0]->push_read (line => $state{read_chunk});
827	});
828	});
829	} else {
830	$hdr{"content-length"} \|\|= $cl;
831
832	$_[0]->push_read (line => $qr_nlnl, sub {
833	if (length $_[1]) {
834	for ("$_[1]") {
835	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
836
837	my $hdr = parse_hdr
838	or return $finish->(undef, $ae_error => "Garbled response trailers");
839
840	%hdr = (%hdr, %$hdr);
841	}
842	}
843
844	$finish->($body, undef, undef, 1);
845	});
846	}
847	};
848
849	$_[0]->push_read (line => $state{read_chunk});	1042	$_[0]->push_read (line => $state{read_chunk});
850		1043
851	} elsif ($arg{on_body}) {	1044	} elsif ($arg{on_body}) {
852	if (defined $len) {	1045	if (defined $len) {
853	$_[0]->on_read (sub {	1046	$_[0]->on_read (sub {
854	$len -= length $_[0]{rbuf};	1047	$len -= length $_[0]{rbuf};
855		1048
856	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)	1049	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
857	or return $finish->(undef, 598 => "Request cancelled by on_body");	1050	or return $finish->(undef, 598 => "Request cancelled by on_body");
858		1051
859	$len > 0	1052	$len > 0
860	or $finish->("", undef, undef, 1);	1053	or $finish->("", undef, undef, 1);
861	});
862	} else {
863	$_[0]->on_eof (sub {
864	$finish->("");
865	});
866	$_[0]->on_read (sub {
867	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
868	or $finish->(undef, 598 => "Request cancelled by on_body");
869	});
870	}	1054	});
871	} else {	1055	} else {
872	$_[0]->on_eof (undef);	1056	$_[0]->on_eof (sub {
873		1057	$finish->("");
874	if (defined $len) {	1058	});
875	$_[0]->on_read (sub {	1059	$_[0]->on_read (sub {
876	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)	1060	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
877	if $len <= length $_[0]{rbuf};	1061	or $finish->(undef, 598 => "Request cancelled by on_body");
878	});
879	} else {
880	$_[0]->on_error (sub {
881	($! == Errno::EPIPE \|\| !$!)
882	? $finish->(delete $_[0]{rbuf})
883	: $finish->(undef, $ae_error => $_[2]);
884	});
885	$_[0]->on_read (sub { });
886	}	1062	});
887	}	1063	}
888	};
889
890	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
891	};
892
893	my $connect_cb = sub {
894	$state{fh} = shift
895	or do {
896	my $err = "$!";
897	%state = ();
898	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });
899	};
900
901	return unless delete $state{connect_guard};
902
903	# get handle
904	$state{handle} = new AnyEvent::Handle
905	fh => $state{fh},
906	peername => $rhost,
907	tls_ctx => $arg{tls_ctx},
908	# these need to be reconfigured on keepalive handles
909	timeout => $timeout,
910	on_error => sub {
911	%state = ();
912	$cb->(undef, { @pseudo, Status => $ae_error, Reason => $_[2] });
913	},
914	on_eof => sub {
915	%state = ();
916	$cb->(undef, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" });
917	},
918	;
919
920	# limit the number of persistent connections
921	# keepalive not yet supported
922	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
923	# ++$KA_COUNT{$_[1]};
924	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
925	# --$KA_COUNT{$_[1]}
926	# };
927	# $hdr{connection} = "keep-alive";
928	# }
929
930	$state{handle}->starttls ("connect") if $rscheme eq "https";
931
932	# now handle proxy-CONNECT method
933	if ($proxy && $uscheme eq "https") {
934	# oh dear, we have to wrap it into a connect request
935
936	# maybe re-use $uauthority with patched port?
937	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
938	$state{handle}->push_read (line => $qr_nlnl, sub {
939	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
940	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
941
942	if ($2 == 200) {
943	$rpath = $upath;
944	$handle_actual_request->();
945	} else {
946	%state = ();
947	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
948	}
949	});
950	} else {	1064	} else {
951	$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	}
952	}	1080	}
953	};	1081	};
954		1082
955	my $tcp_connect = $arg{tcp_connect}	1083	# if keepalive is enabled, then the server closing the connection
956	\|\| 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;
957		1089
958	$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	}
959	};	1114	};
960		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
961	defined wantarray && AnyEvent::Util::guard { %state = () }	1196	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
962	}	1197	}
963		1198
964	sub http_get($@) {	1199	sub http_get($@) {
965	unshift @_, "GET";	1200	unshift @_, "GET";
966	&http_request	1201	&http_request
…		…
984	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1219	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
985	the actual connection, which in turn uses AnyEvent::DNS to resolve	1220	the actual connection, which in turn uses AnyEvent::DNS to resolve
986	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
987	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
988	your own default resolver (by storing a suitable resolver object in	1223	your own default resolver (by storing a suitable resolver object in
989	C<$AnyEvent::DNS::RESOLVER>).	1224	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
990		1225
991	=head2 GLOBAL FUNCTIONS AND VARIABLES	1226	=head2 GLOBAL FUNCTIONS AND VARIABLES
992		1227
993	=over 4	1228	=over 4
994		1229
995	=item AnyEvent::HTTP::set_proxy "proxy-url"	1230	=item AnyEvent::HTTP::set_proxy "proxy-url"
996		1231
997	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
998	string of the form C<http://host:port> (optionally C<https:...>), croaks	1233	string of the form C<http://host:port>, croaks otherwise.
999	otherwise.
1000		1234
1001	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>}.
1002		1240
1003	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]	1241	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
1004		1242
1005	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
1006	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
…		…
1016		1254
1017	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
1018	emptied. All other keys are hostnames or IP addresses pointing to	1256	emptied. All other keys are hostnames or IP addresses pointing to
1019	hash-references. The key for these inner hash references is the	1257	hash-references. The key for these inner hash references is the
1020	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
1021	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
1022	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
1023	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>,
1024	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
1025	expiry timestamp.	1263	expiry timestamp. Session cookies are indicated by not having an
		1264	C<_expires> key.
1026		1265
1027	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
1028	chance of understanding the above paragraph:	1267	chance of understanding the above paragraph:
1029		1268
1030	{	1269	{
…		…
1052		1291
1053	=item $AnyEvent::HTTP::MAX_RECURSE	1292	=item $AnyEvent::HTTP::MAX_RECURSE
1054		1293
1055	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>).
1056		1295
		1296	=item $AnyEvent::HTTP::TIMEOUT
		1297
		1298	The default timeout for connection operations (default: C<300>).
		1299
1057	=item $AnyEvent::HTTP::USERAGENT	1300	=item $AnyEvent::HTTP::USERAGENT
1058		1301
1059	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
1060	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)>).
1061		1304
1062	=item $AnyEvent::HTTP::MAX_PER_HOST	1305	=item $AnyEvent::HTTP::MAX_PER_HOST
1063		1306
1064	The maximum number of concurrent connections to the same host (identified	1307	The maximum number of concurrent connections to the same host (identified
1065	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
1066	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.
1067		1311
1068	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
1069	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, newers (such as firefox 3) typically
		1317	use 6, and Opera uses 8 because like, they have the fastest browser and
		1318	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>).
1070		1324
1071	=item $AnyEvent::HTTP::ACTIVE	1325	=item $AnyEvent::HTTP::ACTIVE
1072		1326
1073	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
1074	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
1075	connections. This number of can be useful for load-leveling.	1329	connections. This number can be useful for load-leveling.
1076		1330
1077	=back	1331	=back
1078		1332
1079	=cut	1333	=cut
1080		1334
…		…
1114	# other formats fail in the loop below	1368	# other formats fail in the loop below
1115		1369
1116	for (0..11) {	1370	for (0..11) {
1117	if ($m eq $month[$_]) {	1371	if ($m eq $month[$_]) {
1118	require Time::Local;	1372	require Time::Local;
1119	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1373	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
1120	}	1374	}
1121	}	1375	}
1122		1376
1123	undef	1377	undef
1124	}	1378	}
1125		1379
1126	sub set_proxy($) {	1380	sub set_proxy($) {
1127	if (length $_[0]) {	1381	if (length $_[0]) {
1128	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1382	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1129	or Carp::croak "$_[0]: invalid proxy URL";	1383	or Carp::croak "$_[0]: invalid proxy URL";
1130	$PROXY = [$2, $3 \|\| 3128, $1]	1384	$PROXY = [$2, $3 \|\| 3128, $1]
1131	} else {	1385	} else {
1132	undef $PROXY;	1386	undef $PROXY;
1133	}	1387	}
…		…
1136	# initialise proxy from environment	1390	# initialise proxy from environment
1137	eval {	1391	eval {
1138	set_proxy $ENV{http_proxy};	1392	set_proxy $ENV{http_proxy};
1139	};	1393	};
1140		1394
		1395	=head2 SHOWCASE
		1396
		1397	This section contaisn 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 occured, 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
1141	=head2 SOCKS PROXIES	1497	=head3 SOCKS PROXIES
1142		1498
1143	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1499	Socks proxies are not directly supported by AnyEvent::HTTP. You can
1144	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
1145	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
1146	transparently.	1502	transparently.

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.85 by root, Sun Jan 2 05:31:56 2011 UTC vs. Revision 1.116 by root, Fri May 17 07:19:23 2013 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.85 by root, Sun Jan 2 05:31:56 2011 UTC vs.
Revision 1.116 by root, Fri May 17 07:19:23 2013 UTC