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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.91 by root, Mon Jan 3 01:03:29 2011 UTC vs.
Revision 1.125 by root, Thu May 14 02:04:35 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
…		…
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 = 2.22;
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 = 2;
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
…		…
93	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
94	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
95	destroyed before the callback is called, the request will be cancelled.	91	destroyed before the callback is called, the request will be cancelled.
96		92
97	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
98	(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
99	(and trailers) as second argument.	95	(and trailers) as second argument.
100		96
101	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
102	headers, the "pseudo-headers" (uppercase to avoid clashing with possible	98	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
103	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the	99	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
…		…
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.
		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.
165		166
166	=item headers => hashref	167	=item headers => hashref
167		168
168	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
169	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
…		…
173		174
174	You really should provide your own C<User-Agent:> header value that is	175	You really should provide your own C<User-Agent:> header value that is
175	appropriate for your program - I wouldn't be surprised if the default	176	appropriate for your program - I wouldn't be surprised if the default
176	AnyEvent string gets blocked by webservers sooner or later.	177	AnyEvent string gets blocked by webservers sooner or later.
177		178
		179	Also, make sure that your headers names and values do not contain any
		180	embedded newlines.
		181
178	=item timeout => $seconds	182	=item timeout => $seconds
179		183
180	The time-out to use for various stages - each connect attempt will reset	184	The time-out to use for various stages - each connect attempt will reset
181	the timeout, as will read or write activity, i.e. this is not an overall	185	the timeout, as will read or write activity, i.e. this is not an overall
182	timeout.	186	timeout.
183		187
184	Default timeout is 5 minutes.	188	Default timeout is 5 minutes.
185		189
186	=item proxy => [$host, $port[, $scheme]] or undef	190	=item proxy => [$host, $port[, $scheme]] or undef
187		191
188	Use the given http proxy for all requests. If not specified, then the	192	Use the given http proxy for all requests, or no proxy if C<undef> is
189	default proxy (as specified by C<$ENV{http_proxy}>) is used.	193	used.
190		194
191	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.
192	HTTPS.	196
		197	If not specified, then the default proxy is used (see
		198	C<AnyEvent::HTTP::set_proxy>).
		199
		200	Currently, if your proxy requires authorization, you have to specify an
		201	appropriate "Proxy-Authorization" header in every request.
193		202
194	=item body => $string	203	=item body => $string
195		204
196	The request body, usually empty. Will be sent as-is (future versions of	205	The request body, usually empty. Will be sent as-is (future versions of
197	this module might offer more options).	206	this module might offer more options).
…		…
228	verification) TLS context.	237	verification) TLS context.
229		238
230	The default for this option is C<low>, which could be interpreted as "give	239	The default for this option is C<low>, which could be interpreted as "give
231	me the page, no matter what".	240	me the page, no matter what".
232		241
		242	See also the C<sessionid> parameter.
		243
		244	=item session => $string
		245
		246	The module might reuse connections to the same host internally. Sometimes
		247	(e.g. when using TLS), you do not want to reuse connections from other
		248	sessions. This can be achieved by setting this parameter to some unique
		249	ID (such as the address of an object storing your state data, or the TLS
		250	context) - only connections using the same unique ID will be reused.
		251
233	=item on_prepare => $callback->($fh)	252	=item on_prepare => $callback->($fh)
234		253
235	In rare cases you need to "tune" the socket before it is used to	254	In rare cases you need to "tune" the socket before it is used to
236	connect (for exmaple, to bind it on a given IP address). This parameter	255	connect (for example, to bind it on a given IP address). This parameter
237	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	256	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
238	and behaves exactly the same way (e.g. it has to provide a	257	and behaves exactly the same way (e.g. it has to provide a
239	timeout). See the description for the C<$prepare_cb> argument of	258	timeout). See the description for the C<$prepare_cb> argument of
240	C<AnyEvent::Socket::tcp_connect> for details.	259	C<AnyEvent::Socket::tcp_connect> for details.
241		260
…		…
306	called. Instead of the C<$body> argument containing the body data, the	325	called. Instead of the C<$body> argument containing the body data, the
307	callback will receive the L<AnyEvent::Handle> object associated with the	326	callback will receive the L<AnyEvent::Handle> object associated with the
308	connection. In error cases, C<undef> will be passed. When there is no body	327	connection. In error cases, C<undef> will be passed. When there is no body
309	(e.g. status C<304>), the empty string will be passed.	328	(e.g. status C<304>), the empty string will be passed.
310		329
311	The handle object might or might not be in TLS mode, might be connected to	330	The handle object might or might not be in TLS mode, might be connected
312	a proxy, be a persistent connection etc., and configured in unspecified	331	to a proxy, be a persistent connection, use chunked transfer encoding
313	ways. The user is responsible for this handle (it will not be used by this	332	etc., and configured in unspecified ways. The user is responsible for this
314	module anymore).	333	handle (it will not be used by this module anymore).
315		334
316	This is useful with some push-type services, where, after the initial	335	This is useful with some push-type services, where, after the initial
317	headers, an interactive protocol is used (typical example would be the	336	headers, an interactive protocol is used (typical example would be the
318	push-style twitter API which starts a JSON/XML stream).	337	push-style twitter API which starts a JSON/XML stream).
319		338
320	If you think you need this, first have a look at C<on_body>, to see if	339	If you think you need this, first have a look at C<on_body>, to see if
321	that doesn't solve your problem in a better way.	340	that doesn't solve your problem in a better way.
		341
		342	=item persistent => $boolean
		343
		344	Try to create/reuse a persistent connection. When this flag is set
		345	(default: true for idempotent requests, false for all others), then
		346	C<http_request> tries to re-use an existing (previously-created)
		347	persistent connection to the host and, failing that, tries to create a new
		348	one.
		349
		350	Requests failing in certain ways will be automatically retried once, which
		351	is dangerous for non-idempotent requests, which is why it defaults to off
		352	for them. The reason for this is because the bozos who designed HTTP/1.1
		353	made it impossible to distinguish between a fatal error and a normal
		354	connection timeout, so you never know whether there was a problem with
		355	your request or not.
		356
		357	When reusing an existent connection, many parameters (such as TLS context)
		358	will be ignored. See the C<session> parameter for a workaround.
		359
		360	=item keepalive => $boolean
		361
		362	Only used when C<persistent> is also true. This parameter decides whether
		363	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		364	(as opposed to only a HTTP/1.1 persistent connection).
		365
		366	The default is true, except when using a proxy, in which case it defaults
		367	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		368
		369	=item handle_params => { key => value ... }
		370
		371	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		372	constructor that is called - not all requests will create a handle, and
		373	sometimes more than one is created, so this parameter is only good for
		374	setting hints.
		375
		376	Example: set the maximum read size to 4096, to potentially conserve memory
		377	at the cost of speed.
		378
		379	handle_params => {
		380	max_read_size => 4096,
		381	},
322		382
323	=back	383	=back
324		384
325	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	385	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
326	the response body.	386	the response body.
…		…
332		392
333	Example: do a HTTP HEAD request on https://www.google.com/, use a	393	Example: do a HTTP HEAD request on https://www.google.com/, use a
334	timeout of 30 seconds.	394	timeout of 30 seconds.
335		395
336	http_request	396	http_request
337	GET => "https://www.google.com",	397	HEAD => "https://www.google.com",
338	headers => { "user-agent" => "MySearchClient 1.0" },	398	headers => { "user-agent" => "MySearchClient 1.0" },
339	timeout => 30,	399	timeout => 30,
340	sub {	400	sub {
341	my ($body, $hdr) = @_;	401	my ($body, $hdr) = @_;
342	use Data::Dumper;	402	use Data::Dumper;
…		…
353	};	413	};
354		414
355	undef $request;	415	undef $request;
356		416
357	=cut	417	=cut
		418
		419	#############################################################################
		420	# wait queue/slots
358		421
359	sub _slot_schedule;	422	sub _slot_schedule;
360	sub _slot_schedule($) {	423	sub _slot_schedule($) {
361	my $host = shift;	424	my $host = shift;
362		425
…		…
385		448
386	_slot_schedule $_[0];	449	_slot_schedule $_[0];
387	}	450	}
388		451
389	#############################################################################	452	#############################################################################
		453	# cookie handling
390		454
391	# expire cookies	455	# expire cookies
392	sub cookie_jar_expire($;$) {	456	sub cookie_jar_expire($;$) {
393	my ($jar, $session_end) = @_;	457	my ($jar, $session_end) = @_;
394		458
…		…
418	}	482	}
419	}	483	}
420		484
421	# extract cookies from jar	485	# extract cookies from jar
422	sub cookie_jar_extract($$$$) {	486	sub cookie_jar_extract($$$$) {
423	my ($jar, $uscheme, $uhost, $upath) = @_;	487	my ($jar, $scheme, $host, $path) = @_;
424		488
425	%$jar = () if $jar->{version} != 1;	489	%$jar = () if $jar->{version} != 1;
426		490
427	my @cookies;	491	my @cookies;
428		492
429	while (my ($chost, $paths) = each %$jar) {	493	while (my ($chost, $paths) = each %$jar) {
430	next unless ref $paths;	494	next unless ref $paths;
431		495
432	if ($chost =~ /^\./) {	496	if ($chost =~ /^\./) {
433	next unless $chost eq substr $uhost, -length $chost;	497	next unless $chost eq substr $host, -length $chost;
434	} elsif ($chost =~ /\./) {	498	} elsif ($chost =~ /\./) {
435	next unless $chost eq $uhost;	499	next unless $chost eq $host;
436	} else {	500	} else {
437	next;	501	next;
438	}	502	}
439		503
440	while (my ($cpath, $cookies) = each %$paths) {	504	while (my ($cpath, $cookies) = each %$paths) {
441	next unless $cpath eq substr $upath, 0, length $cpath;	505	next unless $cpath eq substr $path, 0, length $cpath;
442		506
443	while (my ($cookie, $kv) = each %$cookies) {	507	while (my ($cookie, $kv) = each %$cookies) {
444	next if $uscheme ne "https" && exists $kv->{secure};	508	next if $scheme ne "https" && exists $kv->{secure};
445		509
446	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {	510	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
447	delete $cookies->{$cookie};	511	delete $cookies->{$cookie};
448	next;	512	next;
449	}	513	}
…		…
463	\@cookies	527	\@cookies
464	}	528	}
465		529
466	# parse set_cookie header into jar	530	# parse set_cookie header into jar
467	sub cookie_jar_set_cookie($$$$) {	531	sub cookie_jar_set_cookie($$$$) {
468	my ($jar, $set_cookie, $uhost, $date) = @_;	532	my ($jar, $set_cookie, $host, $date) = @_;
469		533
470	my $anow = int AE::now;	534	my $anow = int AE::now;
471	my $snow; # server-now	535	my $snow; # server-now
472		536
473	for ($set_cookie) {	537	for ($set_cookie) {
…		…
479	while (	543	while (
480	m{	544	m{
481	\G\s*	545	\G\s*
482	(?:	546	(?:
483	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)	547	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
484	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) ) )?	548	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^;,[:space:]]) ) )?
485	)	549	)
486	}gcxsi	550	}gcxsi
487	) {	551	) {
488	my $name = $2;	552	my $name = $2;
489	my $value = $4;	553	my $value = $4;
…		…
496	# quoted	560	# quoted
497	$value = $3;	561	$value = $3;
498	$value =~ s/\\(.)/$1/gs;	562	$value =~ s/\\(.)/$1/gs;
499	}	563	}
500		564
501	push @kv, lc $name, $value;	565	push @kv, @kv ? lc $name : $name, $value;
502		566
503	last unless /\G\s*;/gc;	567	last unless /\G\s*;/gc;
504	}	568	}
505		569
506	last unless @kv;	570	last unless @kv;
…		…
529		593
530	# this is not rfc-like and not netscape-like. go figure.	594	# this is not rfc-like and not netscape-like. go figure.
531	my $ndots = $cdom =~ y/.//;	595	my $ndots = $cdom =~ y/.//;
532	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	596	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
533	} else {	597	} else {
534	$cdom = $uhost;	598	$cdom = $host;
535	}	599	}
536		600
537	# store it	601	# store it
538	$jar->{version} = 1;	602	$jar->{version} = 1;
539	$jar->{lc $cdom}{$cpath}{$name} = \%kv;	603	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
540		604
541	redo if /\G\s*,/gc;	605	redo if /\G\s*,/gc;
542	}	606	}
543	}	607	}
544		608
		609	#############################################################################
		610	# keepalive/persistent connection cache
		611
		612	# fetch a connection from the keepalive cache
		613	sub ka_fetch($) {
		614	my $ka_key = shift;
		615
		616	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		617	delete $KA_CACHE{$ka_key}
		618	unless @{ $KA_CACHE{$ka_key} };
		619
		620	$hdl
		621	}
		622
		623	sub ka_store($$) {
		624	my ($ka_key, $hdl) = @_;
		625
		626	my $kaa = $KA_CACHE{$ka_key} \|\|= [];
		627
		628	my $destroy = sub {
		629	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		630
		631	$hdl->destroy;
		632
		633	@ka
		634	? $KA_CACHE{$ka_key} = \@ka
		635	: delete $KA_CACHE{$ka_key};
		636	};
		637
		638	# on error etc., destroy
		639	$hdl->on_error ($destroy);
		640	$hdl->on_eof ($destroy);
		641	$hdl->on_read ($destroy);
		642	$hdl->timeout ($PERSISTENT_TIMEOUT);
		643
		644	push @$kaa, $hdl;
		645	shift @$kaa while @$kaa > $MAX_PER_HOST;
		646	}
		647
		648	#############################################################################
		649	# utilities
		650
545	# continue to parse $_ for headers and place them into the arg	651	# continue to parse $_ for headers and place them into the arg
546	sub parse_hdr() {	652	sub _parse_hdr() {
547	my %hdr;	653	my %hdr;
548		654
549	# things seen, not parsed:	655	# things seen, not parsed:
550	# p3pP="NON CUR OTPi OUR NOR UNI"	656	# p3pP="NON CUR OTPi OUR NOR UNI"
551		657
…		…
565	for values %hdr;	671	for values %hdr;
566		672
567	\%hdr	673	\%hdr
568	}	674	}
569		675
		676	#############################################################################
		677	# http_get
		678
570	our $qr_nlnl = qr{(?<![^\012])\015?\012};	679	our $qr_nlnl = qr{(?<![^\012])\015?\012};
571		680
572	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	681	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
573	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	682	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		683
		684	# maybe it should just become a normal object :/
		685
		686	sub _destroy_state(\%) {
		687	my ($state) = @_;
		688
		689	$state->{handle}->destroy if $state->{handle};
		690	%$state = ();
		691	}
		692
		693	sub _error(\%$$) {
		694	my ($state, $cb, $hdr) = @_;
		695
		696	&_destroy_state ($state);
		697
		698	$cb->(undef, $hdr);
		699	()
		700	}
		701
		702	our %IDEMPOTENT = (
		703	DELETE => 1,
		704	GET => 1,
		705	HEAD => 1,
		706	OPTIONS => 1,
		707	PUT => 1,
		708	TRACE => 1,
		709
		710	ACL => 1,
		711	"BASELINE-CONTROL" => 1,
		712	BIND => 1,
		713	CHECKIN => 1,
		714	CHECKOUT => 1,
		715	COPY => 1,
		716	LABEL => 1,
		717	LINK => 1,
		718	MERGE => 1,
		719	MKACTIVITY => 1,
		720	MKCALENDAR => 1,
		721	MKCOL => 1,
		722	MKREDIRECTREF => 1,
		723	MKWORKSPACE => 1,
		724	MOVE => 1,
		725	ORDERPATCH => 1,
		726	PROPFIND => 1,
		727	PROPPATCH => 1,
		728	REBIND => 1,
		729	REPORT => 1,
		730	SEARCH => 1,
		731	UNBIND => 1,
		732	UNCHECKOUT => 1,
		733	UNLINK => 1,
		734	UNLOCK => 1,
		735	UPDATE => 1,
		736	UPDATEREDIRECTREF => 1,
		737	"VERSION-CONTROL" => 1,
		738	);
574		739
575	sub http_request($$@) {	740	sub http_request($$@) {
576	my $cb = pop;	741	my $cb = pop;
577	my ($method, $url, %arg) = @_;	742	my ($method, $url, %arg) = @_;
578		743
…		…
596	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	761	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
597		762
598	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	763	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
599	if $recurse < 0;	764	if $recurse < 0;
600		765
601	my $proxy = $arg{proxy} \|\| $PROXY;	766	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
602	my $timeout = $arg{timeout} \|\| $TIMEOUT;	767	my $timeout = $arg{timeout} \|\| $TIMEOUT;
603		768
604	my ($uscheme, $uauthority, $upath, $query, $fragment) =	769	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
605	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;	770	$url =~ m\|^([^:]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
606		771
607	$uscheme = lc $uscheme;	772	$uscheme = lc $uscheme;
608		773
609	my $uport = $uscheme eq "http" ? 80	774	my $uport = $uscheme eq "http" ? 80
610	: $uscheme eq "https" ? 443	775	: $uscheme eq "https" ? 443
611	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });	776	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
612		777
613	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	778	$uauthority =~ /^(?: .*\@ )? ([^\@]+?) (?: : (\d+) )?$/x
614	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	779	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
615		780
616	my $uhost = lc $1;	781	my $uhost = lc $1;
617	$uport = $2 if defined $2;	782	$uport = $2 if defined $2;
618		783
…		…
654	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	819	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
655		820
656	$hdr{"content-length"} = length $arg{body}	821	$hdr{"content-length"} = length $arg{body}
657	if length $arg{body} \|\| $method ne "GET";	822	if length $arg{body} \|\| $method ne "GET";
658		823
659	my $idempotent = $method =~ /^(?:GET\|HEAD\|PUT\|DELETE\|OPTIONS\|TRACE)$/;	824	my $idempotent = $IDEMPOTENT{$method};
660		825
661	# default value for keepalive is true iff the request is for an idempotent method	826	# default value for keepalive is true iff the request is for an idempotent method
662	my $keepalive = exists $arg{keepalive}	827	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
663	? $arg{keepalive}*1	828	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
664	: $idempotent ? $PERSISTENT_TIMEOUT : 0;	829	my $was_persistent; # true if this is actually a recycled connection
665		830
		831	# the key to use in the keepalive cache
		832	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		833
666	$hdr{connection} = ($keepalive ? "" : "close ") . "Te"; #1.1	834	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
667	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	835	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
668		836
669	my %state = (connect_guard => 1);	837	my %state = (connect_guard => 1);
670		838
671	my $ae_error = 595; # connecting	839	my $ae_error = 595; # connecting
672		840
673	# handle actual, non-tunneled, request	841	# handle actual, non-tunneled, request
674	my $handle_actual_request = sub {	842	my $handle_actual_request = sub {
675	$ae_error = 596; # request phase	843	$ae_error = 596; # request phase
676		844
		845	my $hdl = $state{handle};
		846
677	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};	847	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
678		848
679	# send request	849	# send request
680	$state{handle}->push_write (	850	$hdl->push_write (
681	"$method $rpath HTTP/1.1\015\012"	851	"$method $rpath HTTP/1.1\015\012"
682	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)	852	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
683	. "\015\012"	853	. "\015\012"
684	. (delete $arg{body})	854	. $arg{body}
685	);	855	);
686		856
687	# return if error occured during push_write()	857	# return if error occurred during push_write()
688	return unless %state;	858	return unless %state;
689		859
690	# reduce memory usage, save a kitten, also re-use it for the response headers.	860	# reduce memory usage, save a kitten, also re-use it for the response headers.
691	%hdr = ();	861	%hdr = ();
692		862
693	# status line and headers	863	# status line and headers
694	$state{read_response} = sub {	864	$state{read_response} = sub {
		865	return unless %state;
		866
695	for ("$_[1]") {	867	for ("$_[1]") {
696	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	868	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
697		869
698	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci	870	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
699	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));	871	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
700		872
701	# 100 Continue handling	873	# 100 Continue handling
702	# should not happen as we don't send expect: 100-continue,	874	# should not happen as we don't send expect: 100-continue,
703	# but we handle it just in case.	875	# but we handle it just in case.
704	# since we send the request body regardless, if we get an error	876	# since we send the request body regardless, if we get an error
…		…
710	HTTPVersion => $1,	882	HTTPVersion => $1,
711	Status => $2,	883	Status => $2,
712	Reason => $3,	884	Reason => $3,
713	;	885	;
714		886
715	my $hdr = parse_hdr	887	my $hdr = _parse_hdr
716	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));	888	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
717		889
718	%hdr = (%$hdr, @pseudo);	890	%hdr = (%$hdr, @pseudo);
719	}	891	}
720		892
721	# redirect handling	893	# redirect handling
722	# microsoft and other shitheads don't give a shit for following standards,	894	# relative uri handling forced by microsoft and other shitheads.
723	# try to support some common forms of broken Location headers.	895	# we give our best and fall back to URI if available.
724	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {	896	if (exists $hdr{location}) {
		897	my $loc = $hdr{location};
		898
		899	if ($loc =~ m%^//%) { # //
		900	$loc = "$rscheme:$loc";
		901
		902	} elsif ($loc eq "") {
		903	$loc = $url;
		904
		905	} elsif ($loc !~ /^(?: $ \| [^:\/?\#]+ : )/x) { # anything "simple"
725	$hdr{location} =~ s/^\.\/+//;	906	$loc =~ s/^\.\/+//;
726		907
		908	if ($loc !~ m%^[.?#]%) {
727	my $url = "$rscheme://$uhost:$uport";	909	my $prefix = "$rscheme://$uhost:$uport";
728		910
729	unless ($hdr{location} =~ s/^\///) {	911	unless ($loc =~ s/^\///) {
730	$url .= $upath;	912	$prefix .= $upath;
731	$url =~ s/\/[^\/]*$//;	913	$prefix =~ s/\/[^\/]*$//;
		914	}
		915
		916	$loc = "$prefix/$loc";
		917
		918	} elsif (eval { require URI }) { # uri
		919	$loc = URI->new_abs ($loc, $url)->as_string;
		920
		921	} else {
		922	return _error %state, $cb, { @pseudo, Status => 599, Reason => "Cannot parse Location (URI module missing)" };
		923	#$hdr{Status} = 599;
		924	#$hdr{Reason} = "Unparsable Redirect (URI module missing)";
		925	#$recurse = 0;
		926	}
732	}	927	}
733		928
734	$hdr{location} = "$url/$hdr{location}";	929	$hdr{location} = $loc;
735	}	930	}
736		931
737	my $redirect;	932	my $redirect;
738		933
739	if ($recurse) {	934	if ($recurse) {
…		…
741		936
742	# industry standard is to redirect POST as GET for	937	# industry standard is to redirect POST as GET for
743	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.	938	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
744	# also, the UA should ask the user for 301 and 307 and POST,	939	# also, the UA should ask the user for 301 and 307 and POST,
745	# industry standard seems to be to simply follow.	940	# industry standard seems to be to simply follow.
746	# we go with the industry standard.	941	# we go with the industry standard. 308 is defined
		942	# by rfc7538
747	if ($status == 301 or $status == 302 or $status == 303) {	943	if ($status == 301 or $status == 302 or $status == 303) {
		944	$redirect = 1;
748	# HTTP/1.1 is unclear on how to mutate the method	945	# HTTP/1.1 is unclear on how to mutate the method
749	$method = "GET" unless $method eq "HEAD";	946	unless ($method eq "HEAD") {
750	$redirect = 1;	947	$method = "GET";
		948	delete $arg{body};
		949	}
751	} elsif ($status == 307) {	950	} elsif ($status == 307 or $status == 308) {
752	$redirect = 1;	951	$redirect = 1;
753	}	952	}
754	}	953	}
755		954
756	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])	955	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
757	my $may_keep_alive = $_[3];	956	if ($state{handle}) {
758		957	# handle keepalive
		958	if (
		959	$persistent
		960	&& $_[3]
		961	&& ($hdr{HTTPVersion} < 1.1
		962	? $hdr{connection} =~ /\bkeep-?alive\b/i
		963	: $hdr{connection} !~ /\bclose\b/i)
		964	) {
		965	ka_store $ka_key, delete $state{handle};
		966	} else {
		967	# no keepalive, destroy the handle
759	$state{handle}->destroy if $state{handle};	968	$state{handle}->destroy;
		969	}
		970	}
		971
760	%state = ();	972	%state = ();
761		973
762	if (defined $_[1]) {	974	if (defined $_[1]) {
763	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];	975	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
764	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];	976	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
…		…
771		983
772	if ($redirect && exists $hdr{location}) {	984	if ($redirect && exists $hdr{location}) {
773	# we ignore any errors, as it is very common to receive	985	# we ignore any errors, as it is very common to receive
774	# Content-Length != 0 but no actual body	986	# Content-Length != 0 but no actual body
775	# we also access %hdr, as $_[1] might be an erro	987	# we also access %hdr, as $_[1] might be an erro
		988	$state{recurse} =
776	http_request (	989	http_request (
777	$method => $hdr{location},	990	$method => $hdr{location},
778	%arg,	991	%arg,
779	recurse => $recurse - 1,	992	recurse => $recurse - 1,
780	Redirect => [$_[0], \%hdr],	993	Redirect => [$_[0], \%hdr],
		994	sub {
		995	%state = ();
		996	&$cb
		997	},
781	$cb);	998	);
782	} else {	999	} else {
783	$cb->($_[0], \%hdr);	1000	$cb->($_[0], \%hdr);
784	}	1001	}
785	};	1002	};
786		1003
…		…
813		1030
814	$finish->(delete $state{handle});	1031	$finish->(delete $state{handle});
815		1032
816	} elsif ($chunked) {	1033	} elsif ($chunked) {
817	my $cl = 0;	1034	my $cl = 0;
818	my $body = undef;	1035	my $body = "";
819	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };	1036	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
820		1037
821	$state{read_chunk} = sub {	1038	$state{read_chunk} = sub {
822	$_[1] =~ /^([0-9a-fA-F]+)/	1039	$_[1] =~ /^([0-9a-fA-F]+)/
823	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");	1040	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
824		1041
825	my $len = hex $1;	1042	my $len = hex $1;
826		1043
827	if ($len) {	1044	if ($len) {
828	$cl += $len;	1045	$cl += $len;
…		…
843	$_[0]->push_read (line => $qr_nlnl, sub {	1060	$_[0]->push_read (line => $qr_nlnl, sub {
844	if (length $_[1]) {	1061	if (length $_[1]) {
845	for ("$_[1]") {	1062	for ("$_[1]") {
846	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	1063	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
847		1064
848	my $hdr = parse_hdr	1065	my $hdr = _parse_hdr
849	or return $finish->(undef, $ae_error => "Garbled response trailers");	1066	or return $finish->(undef, $ae_error => "Garbled response trailers");
850		1067
851	%hdr = (%hdr, %$hdr);	1068	%hdr = (%hdr, %$hdr);
852	}	1069	}
853	}	1070	}
…		…
896	$_[0]->on_read (sub { });	1113	$_[0]->on_read (sub { });
897	}	1114	}
898	}	1115	}
899	};	1116	};
900		1117
		1118	# if keepalive is enabled, then the server closing the connection
		1119	# before a response can happen legally - we retry on idempotent methods.
		1120	if ($was_persistent && $idempotent) {
		1121	my $old_eof = $hdl->{on_eof};
		1122	$hdl->{on_eof} = sub {
		1123	_destroy_state %state;
		1124
		1125	%state = ();
		1126	$state{recurse} =
		1127	http_request (
		1128	$method => $url,
		1129	%arg,
		1130	recurse => $recurse - 1,
		1131	persistent => 0,
		1132	sub {
		1133	%state = ();
		1134	&$cb
		1135	}
		1136	);
		1137	};
		1138	$hdl->on_read (sub {
		1139	return unless %state;
		1140
		1141	# as soon as we receive something, a connection close
		1142	# once more becomes a hard error
		1143	$hdl->{on_eof} = $old_eof;
		1144	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1145	});
		1146	} else {
901	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});	1147	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1148	}
902	};	1149	};
903		1150
		1151	my $prepare_handle = sub {
		1152	my ($hdl) = $state{handle};
		1153
		1154	$hdl->on_error (sub {
		1155	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1156	});
		1157	$hdl->on_eof (sub {
		1158	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1159	});
		1160	$hdl->timeout_reset;
		1161	$hdl->timeout ($timeout);
		1162	};
		1163
		1164	# connected to proxy (or origin server)
904	my $connect_cb = sub {	1165	my $connect_cb = sub {
905	$state{fh} = shift	1166	my $fh = shift
906	or do {
907	my $err = "$!";
908	%state = ();
909	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });	1167	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
910	};
911		1168
912	return unless delete $state{connect_guard};	1169	return unless delete $state{connect_guard};
913		1170
914	# get handle	1171	# get handle
915	$state{handle} = new AnyEvent::Handle	1172	$state{handle} = new AnyEvent::Handle
		1173	%{ $arg{handle_params} },
916	fh => $state{fh},	1174	fh => $fh,
917	peername => $rhost,	1175	peername => $uhost,
918	tls_ctx => $arg{tls_ctx},	1176	tls_ctx => $arg{tls_ctx},
919	# these need to be reconfigured on keepalive handles
920	timeout => $timeout,
921	on_error => sub {
922	%state = ();
923	$cb->(undef, { @pseudo, Status => $ae_error, Reason => $_[2] });
924	},
925	on_eof => sub {
926	%state = ();
927	$cb->(undef, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" });
928	},
929	;	1177	;
930		1178
931	# limit the number of persistent connections	1179	$prepare_handle->();
932	# keepalive not yet supported
933	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
934	# ++$KA_COUNT{$_[1]};
935	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
936	# --$KA_COUNT{$_[1]}
937	# };
938	# $hdr{connection} = "keep-alive";
939	# }
940		1180
941	$state{handle}->starttls ("connect") if $rscheme eq "https";	1181	#$state{handle}->starttls ("connect") if $rscheme eq "https";
942		1182
943	# now handle proxy-CONNECT method	1183	# now handle proxy-CONNECT method
944	if ($proxy && $uscheme eq "https") {	1184	if ($proxy && $uscheme eq "https") {
945	# oh dear, we have to wrap it into a connect request	1185	# oh dear, we have to wrap it into a connect request
946		1186
		1187	my $auth = exists $hdr{"proxy-authorization"}
		1188	? "proxy-authorization: " . (delete $hdr{"proxy-authorization"}) . "\015\012"
		1189	: "";
		1190
947	# maybe re-use $uauthority with patched port?	1191	# maybe re-use $uauthority with patched port?
948	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");	1192	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012$auth\015\012");
949	$state{handle}->push_read (line => $qr_nlnl, sub {	1193	$state{handle}->push_read (line => $qr_nlnl, sub {
950	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix	1194	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
951	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));	1195	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
952		1196
953	if ($2 == 200) {	1197	if ($2 == 200) {
954	$rpath = $upath;	1198	$rpath = $upath;
955	$handle_actual_request->();	1199	$handle_actual_request->();
956	} else {	1200	} else {
957	%state = ();
958	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });	1201	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
959	}	1202	}
960	});	1203	});
961	} else {	1204	} else {
		1205	delete $hdr{"proxy-authorization"} unless $proxy;
		1206
962	$handle_actual_request->();	1207	$handle_actual_request->();
963	}	1208	}
964	};	1209	};
965		1210
966	_get_slot $uhost, sub {	1211	_get_slot $uhost, sub {
967	$state{slot_guard} = shift;	1212	$state{slot_guard} = shift;
968		1213
969	return unless $state{connect_guard};	1214	return unless $state{connect_guard};
970		1215
		1216	# try to use an existing keepalive connection, but only if we, ourselves, plan
		1217	# on a keepalive request (in theory, this should be a separate config option).
		1218	if ($persistent && $KA_CACHE{$ka_key}) {
		1219	$was_persistent = 1;
		1220
		1221	$state{handle} = ka_fetch $ka_key;
		1222	$state{handle}->destroyed
		1223	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
		1224	$prepare_handle->();
		1225	$state{handle}->destroyed
		1226	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
		1227	$handle_actual_request->();
		1228
		1229	} else {
971	my $tcp_connect = $arg{tcp_connect}	1230	my $tcp_connect = $arg{tcp_connect}
972	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1231	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
973		1232
974	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });	1233	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		1234	}
975	};	1235	};
976		1236
977	defined wantarray && AnyEvent::Util::guard { %state = () }	1237	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
978	}	1238	}
979		1239
980	sub http_get($@) {	1240	sub http_get($@) {
981	unshift @_, "GET";	1241	unshift @_, "GET";
982	&http_request	1242	&http_request
…		…
1000	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1260	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
1001	the actual connection, which in turn uses AnyEvent::DNS to resolve	1261	the actual connection, which in turn uses AnyEvent::DNS to resolve
1002	hostnames. The latter is a simple stub resolver and does no caching	1262	hostnames. The latter is a simple stub resolver and does no caching
1003	on its own. If you want DNS caching, you currently have to provide	1263	on its own. If you want DNS caching, you currently have to provide
1004	your own default resolver (by storing a suitable resolver object in	1264	your own default resolver (by storing a suitable resolver object in
1005	C<$AnyEvent::DNS::RESOLVER>).	1265	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
1006		1266
1007	=head2 GLOBAL FUNCTIONS AND VARIABLES	1267	=head2 GLOBAL FUNCTIONS AND VARIABLES
1008		1268
1009	=over 4	1269	=over 4
1010		1270
1011	=item AnyEvent::HTTP::set_proxy "proxy-url"	1271	=item AnyEvent::HTTP::set_proxy "proxy-url"
1012		1272
1013	Sets the default proxy server to use. The proxy-url must begin with a	1273	Sets the default proxy server to use. The proxy-url must begin with a
1014	string of the form C<http://host:port> (optionally C<https:...>), croaks	1274	string of the form C<http://host:port>, croaks otherwise.
1015	otherwise.
1016		1275
1017	To clear an already-set proxy, use C<undef>.	1276	To clear an already-set proxy, use C<undef>.
		1277
		1278	When AnyEvent::HTTP is loaded for the first time it will query the
		1279	default proxy from the operating system, currently by looking at
		1280	C<$ENV{http_proxy>}.
1018		1281
1019	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]	1282	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
1020		1283
1021	Remove all cookies from the cookie jar that have been expired. If	1284	Remove all cookies from the cookie jar that have been expired. If
1022	C<$session_end> is given and true, then additionally remove all session	1285	C<$session_end> is given and true, then additionally remove all session
1023	cookies.	1286	cookies.
1024		1287
1025	You should call this function (with a true C<$session_end>) before you	1288	You should call this function (with a true C<$session_end>) before you
1026	save cookies to disk, and you should call this function after loading them	1289	save cookies to disk, and you should call this function after loading them
1027	again. If you have a long-running program you can additonally call this	1290	again. If you have a long-running program you can additionally call this
1028	function from time to time.	1291	function from time to time.
1029		1292
1030	A cookie jar is initially an empty hash-reference that is managed by this	1293	A cookie jar is initially an empty hash-reference that is managed by this
1031	module. It's format is subject to change, but currently it is like this:	1294	module. Its format is subject to change, but currently it is as follows:
1032		1295
1033	The key C<version> has to contain C<1>, otherwise the hash gets	1296	The key C<version> has to contain C<1>, otherwise the hash gets
1034	emptied. All other keys are hostnames or IP addresses pointing to	1297	emptied. All other keys are hostnames or IP addresses pointing to
1035	hash-references. The key for these inner hash references is the	1298	hash-references. The key for these inner hash references is the
1036	server path for which this cookie is meant, and the values are again	1299	server path for which this cookie is meant, and the values are again
1037	hash-references. The keys of those hash-references is the cookie name, and	1300	hash-references. Each key of those hash-references is a cookie name, and
1038	the value, you guessed it, is another hash-reference, this time with the	1301	the value, you guessed it, is another hash-reference, this time with the
1039	key-value pairs from the cookie, except for C<expires> and C<max-age>,	1302	key-value pairs from the cookie, except for C<expires> and C<max-age>,
1040	which have been replaced by a C<_expires> key that contains the cookie	1303	which have been replaced by a C<_expires> key that contains the cookie
1041	expiry timestamp.	1304	expiry timestamp. Session cookies are indicated by not having an
		1305	C<_expires> key.
1042		1306
1043	Here is an example of a cookie jar with a single cookie, so you have a	1307	Here is an example of a cookie jar with a single cookie, so you have a
1044	chance of understanding the above paragraph:	1308	chance of understanding the above paragraph:
1045		1309
1046	{	1310	{
…		…
1068		1332
1069	=item $AnyEvent::HTTP::MAX_RECURSE	1333	=item $AnyEvent::HTTP::MAX_RECURSE
1070		1334
1071	The default value for the C<recurse> request parameter (default: C<10>).	1335	The default value for the C<recurse> request parameter (default: C<10>).
1072		1336
		1337	=item $AnyEvent::HTTP::TIMEOUT
		1338
		1339	The default timeout for connection operations (default: C<300>).
		1340
1073	=item $AnyEvent::HTTP::USERAGENT	1341	=item $AnyEvent::HTTP::USERAGENT
1074		1342
1075	The default value for the C<User-Agent> header (the default is	1343	The default value for the C<User-Agent> header (the default is
1076	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1344	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
1077		1345
1078	=item $AnyEvent::HTTP::MAX_PER_HOST	1346	=item $AnyEvent::HTTP::MAX_PER_HOST
1079		1347
1080	The maximum number of concurrent connections to the same host (identified	1348	The maximum number of concurrent connections to the same host (identified
1081	by the hostname). If the limit is exceeded, then the additional requests	1349	by the hostname). If the limit is exceeded, then additional requests
1082	are queued until previous connections are closed.	1350	are queued until previous connections are closed. Both persistent and
		1351	non-persistent connections are counted in this limit.
1083		1352
1084	The default value for this is C<4>, and it is highly advisable to not	1353	The default value for this is C<4>, and it is highly advisable to not
1085	increase it.	1354	increase it much.
		1355
		1356	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1357	connections, older browsers used 2, newer ones (such as firefox 3)
		1358	typically use 6, and Opera uses 8 because like, they have the fastest
		1359	browser and give a shit for everybody else on the planet.
		1360
		1361	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1362
		1363	The time after which idle persistent connections get closed by
		1364	AnyEvent::HTTP (default: C<3>).
1086		1365
1087	=item $AnyEvent::HTTP::ACTIVE	1366	=item $AnyEvent::HTTP::ACTIVE
1088		1367
1089	The number of active connections. This is not the number of currently	1368	The number of active connections. This is not the number of currently
1090	running requests, but the number of currently open and non-idle TCP	1369	running requests, but the number of currently open and non-idle TCP
1091	connections. This number of can be useful for load-leveling.	1370	connections. This number can be useful for load-leveling.
1092		1371
1093	=back	1372	=back
1094		1373
1095	=cut	1374	=cut
1096		1375
…		…
1130	# other formats fail in the loop below	1409	# other formats fail in the loop below
1131		1410
1132	for (0..11) {	1411	for (0..11) {
1133	if ($m eq $month[$_]) {	1412	if ($m eq $month[$_]) {
1134	require Time::Local;	1413	require Time::Local;
1135	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1414	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
1136	}	1415	}
1137	}	1416	}
1138		1417
1139	undef	1418	undef
1140	}	1419	}
1141		1420
1142	sub set_proxy($) {	1421	sub set_proxy($) {
1143	if (length $_[0]) {	1422	if (length $_[0]) {
1144	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1423	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1145	or Carp::croak "$_[0]: invalid proxy URL";	1424	or Carp::croak "$_[0]: invalid proxy URL";
1146	$PROXY = [$2, $3 \|\| 3128, $1]	1425	$PROXY = [$2, $3 \|\| 3128, $1]
1147	} else {	1426	} else {
1148	undef $PROXY;	1427	undef $PROXY;
1149	}	1428	}
…		…
1152	# initialise proxy from environment	1431	# initialise proxy from environment
1153	eval {	1432	eval {
1154	set_proxy $ENV{http_proxy};	1433	set_proxy $ENV{http_proxy};
1155	};	1434	};
1156		1435
		1436	=head2 SHOWCASE
		1437
		1438	This section contains some more elaborate "real-world" examples or code
		1439	snippets.
		1440
		1441	=head2 HTTP/1.1 FILE DOWNLOAD
		1442
		1443	Downloading files with HTTP can be quite tricky, especially when something
		1444	goes wrong and you want to resume.
		1445
		1446	Here is a function that initiates and resumes a download. It uses the
		1447	last modified time to check for file content changes, and works with many
		1448	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1449	on older servers.
		1450
		1451	It calls the completion callback with either C<undef>, which means a
		1452	nonretryable error occurred, C<0> when the download was partial and should
		1453	be retried, and C<1> if it was successful.
		1454
		1455	use AnyEvent::HTTP;
		1456
		1457	sub download($$$) {
		1458	my ($url, $file, $cb) = @_;
		1459
		1460	open my $fh, "+<", $file
		1461	or die "$file: $!";
		1462
		1463	my %hdr;
		1464	my $ofs = 0;
		1465
		1466	warn stat $fh;
		1467	warn -s _;
		1468	if (stat $fh and -s _) {
		1469	$ofs = -s _;
		1470	warn "-s is ", $ofs;
		1471	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1472	$hdr{"range"} = "bytes=$ofs-";
		1473	}
		1474
		1475	http_get $url,
		1476	headers => \%hdr,
		1477	on_header => sub {
		1478	my ($hdr) = @_;
		1479
		1480	if ($hdr->{Status} == 200 && $ofs) {
		1481	# resume failed
		1482	truncate $fh, $ofs = 0;
		1483	}
		1484
		1485	sysseek $fh, $ofs, 0;
		1486
		1487	1
		1488	},
		1489	on_body => sub {
		1490	my ($data, $hdr) = @_;
		1491
		1492	if ($hdr->{Status} =~ /^2/) {
		1493	length $data == syswrite $fh, $data
		1494	or return; # abort on write errors
		1495	}
		1496
		1497	1
		1498	},
		1499	sub {
		1500	my (undef, $hdr) = @_;
		1501
		1502	my $status = $hdr->{Status};
		1503
		1504	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1505	utime $fh, $time, $time;
		1506	}
		1507
		1508	if ($status == 200 \|\| $status == 206 \|\| $status == 416) {
		1509	# download ok \|\| resume ok \|\| file already fully downloaded
		1510	$cb->(1, $hdr);
		1511
		1512	} elsif ($status == 412) {
		1513	# file has changed while resuming, delete and retry
		1514	unlink $file;
		1515	$cb->(0, $hdr);
		1516
		1517	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1518	# retry later
		1519	$cb->(0, $hdr);
		1520
		1521	} else {
		1522	$cb->(undef, $hdr);
		1523	}
		1524	}
		1525	;
		1526	}
		1527
		1528	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1529	if ($_[0]) {
		1530	print "OK!\n";
		1531	} elsif (defined $_[0]) {
		1532	print "please retry later\n";
		1533	} else {
		1534	print "ERROR\n";
		1535	}
		1536	};
		1537
1157	=head2 SOCKS PROXIES	1538	=head3 SOCKS PROXIES
1158		1539
1159	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1540	Socks proxies are not directly supported by AnyEvent::HTTP. You can
1160	compile your perl to support socks, or use an external program such as	1541	compile your perl to support socks, or use an external program such as
1161	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy	1542	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
1162	transparently.	1543	transparently.

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.91 by root, Mon Jan 3 01:03:29 2011 UTC vs. Revision 1.125 by root, Thu May 14 02:04:35 2015 UTC

Diff Legend

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.91 by root, Mon Jan 3 01:03:29 2011 UTC vs.
Revision 1.125 by root, Thu May 14 02:04:35 2015 UTC