[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 1.120 by root, Sun Jun 8 23:36:36 2014 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 = 2.21;
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>).
193		199
194	=item body => $string	200	=item body => $string
195		201
196	The request body, usually empty. Will be sent as-is (future versions of	202	The request body, usually empty. Will be sent as-is (future versions of
197	this module might offer more options).	203	this module might offer more options).
…		…
228	verification) TLS context.	234	verification) TLS context.
229		235
230	The default for this option is C<low>, which could be interpreted as "give	236	The default for this option is C<low>, which could be interpreted as "give
231	me the page, no matter what".	237	me the page, no matter what".
232		238
		239	See also the C<sessionid> parameter.
		240
		241	=item session => $string
		242
		243	The module might reuse connections to the same host internally. Sometimes
		244	(e.g. when using TLS), you do not want to reuse connections from other
		245	sessions. This can be achieved by setting this parameter to some unique
		246	ID (such as the address of an object storing your state data, or the TLS
		247	context) - only connections using the same unique ID will be reused.
		248
233	=item on_prepare => $callback->($fh)	249	=item on_prepare => $callback->($fh)
234		250
235	In rare cases you need to "tune" the socket before it is used to	251	In rare cases you need to "tune" the socket before it is used to
236	connect (for exmaple, to bind it on a given IP address). This parameter	252	connect (for example, to bind it on a given IP address). This parameter
237	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	253	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	254	and behaves exactly the same way (e.g. it has to provide a
239	timeout). See the description for the C<$prepare_cb> argument of	255	timeout). See the description for the C<$prepare_cb> argument of
240	C<AnyEvent::Socket::tcp_connect> for details.	256	C<AnyEvent::Socket::tcp_connect> for details.
241		257
…		…
306	called. Instead of the C<$body> argument containing the body data, the	322	called. Instead of the C<$body> argument containing the body data, the
307	callback will receive the L<AnyEvent::Handle> object associated with the	323	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	324	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.	325	(e.g. status C<304>), the empty string will be passed.
310		326
311	The handle object might or might not be in TLS mode, might be connected to	327	The handle object might or might not be in TLS mode, might be connected
312	a proxy, be a persistent connection etc., and configured in unspecified	328	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	329	etc., and configured in unspecified ways. The user is responsible for this
314	module anymore).	330	handle (it will not be used by this module anymore).
315		331
316	This is useful with some push-type services, where, after the initial	332	This is useful with some push-type services, where, after the initial
317	headers, an interactive protocol is used (typical example would be the	333	headers, an interactive protocol is used (typical example would be the
318	push-style twitter API which starts a JSON/XML stream).	334	push-style twitter API which starts a JSON/XML stream).
319		335
320	If you think you need this, first have a look at C<on_body>, to see if	336	If you think you need this, first have a look at C<on_body>, to see if
321	that doesn't solve your problem in a better way.	337	that doesn't solve your problem in a better way.
		338
		339	=item persistent => $boolean
		340
		341	Try to create/reuse a persistent connection. When this flag is set
		342	(default: true for idempotent requests, false for all others), then
		343	C<http_request> tries to re-use an existing (previously-created)
		344	persistent connection to the host and, failing that, tries to create a new
		345	one.
		346
		347	Requests failing in certain ways will be automatically retried once, which
		348	is dangerous for non-idempotent requests, which is why it defaults to off
		349	for them. The reason for this is because the bozos who designed HTTP/1.1
		350	made it impossible to distinguish between a fatal error and a normal
		351	connection timeout, so you never know whether there was a problem with
		352	your request or not.
		353
		354	When reusing an existent connection, many parameters (such as TLS context)
		355	will be ignored. See the C<session> parameter for a workaround.
		356
		357	=item keepalive => $boolean
		358
		359	Only used when C<persistent> is also true. This parameter decides whether
		360	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		361	(as opposed to only a HTTP/1.1 persistent connection).
		362
		363	The default is true, except when using a proxy, in which case it defaults
		364	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		365
		366	=item handle_params => { key => value ... }
		367
		368	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		369	constructor that is called - not all requests will create a handle, and
		370	sometimes more than one is created, so this parameter is only good for
		371	setting hints.
		372
		373	Example: set the maximum read size to 4096, to potentially conserve memory
		374	at the cost of speed.
		375
		376	handle_params => {
		377	max_read_size => 4096,
		378	},
322		379
323	=back	380	=back
324		381
325	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	382	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
326	the response body.	383	the response body.
…		…
332		389
333	Example: do a HTTP HEAD request on https://www.google.com/, use a	390	Example: do a HTTP HEAD request on https://www.google.com/, use a
334	timeout of 30 seconds.	391	timeout of 30 seconds.
335		392
336	http_request	393	http_request
337	GET => "https://www.google.com",	394	HEAD => "https://www.google.com",
338	headers => { "user-agent" => "MySearchClient 1.0" },	395	headers => { "user-agent" => "MySearchClient 1.0" },
339	timeout => 30,	396	timeout => 30,
340	sub {	397	sub {
341	my ($body, $hdr) = @_;	398	my ($body, $hdr) = @_;
342	use Data::Dumper;	399	use Data::Dumper;
…		…
353	};	410	};
354		411
355	undef $request;	412	undef $request;
356		413
357	=cut	414	=cut
		415
		416	#############################################################################
		417	# wait queue/slots
358		418
359	sub _slot_schedule;	419	sub _slot_schedule;
360	sub _slot_schedule($) {	420	sub _slot_schedule($) {
361	my $host = shift;	421	my $host = shift;
362		422
…		…
385		445
386	_slot_schedule $_[0];	446	_slot_schedule $_[0];
387	}	447	}
388		448
389	#############################################################################	449	#############################################################################
		450	# cookie handling
390		451
391	# expire cookies	452	# expire cookies
392	sub cookie_jar_expire($;$) {	453	sub cookie_jar_expire($;$) {
393	my ($jar, $session_end) = @_;	454	my ($jar, $session_end) = @_;
394		455
…		…
418	}	479	}
419	}	480	}
420		481
421	# extract cookies from jar	482	# extract cookies from jar
422	sub cookie_jar_extract($$$$) {	483	sub cookie_jar_extract($$$$) {
423	my ($jar, $uscheme, $uhost, $upath) = @_;	484	my ($jar, $scheme, $host, $path) = @_;
424		485
425	%$jar = () if $jar->{version} != 1;	486	%$jar = () if $jar->{version} != 1;
426		487
427	my @cookies;	488	my @cookies;
428		489
429	while (my ($chost, $paths) = each %$jar) {	490	while (my ($chost, $paths) = each %$jar) {
430	next unless ref $paths;	491	next unless ref $paths;
431		492
432	if ($chost =~ /^\./) {	493	if ($chost =~ /^\./) {
433	next unless $chost eq substr $uhost, -length $chost;	494	next unless $chost eq substr $host, -length $chost;
434	} elsif ($chost =~ /\./) {	495	} elsif ($chost =~ /\./) {
435	next unless $chost eq $uhost;	496	next unless $chost eq $host;
436	} else {	497	} else {
437	next;	498	next;
438	}	499	}
439		500
440	while (my ($cpath, $cookies) = each %$paths) {	501	while (my ($cpath, $cookies) = each %$paths) {
441	next unless $cpath eq substr $upath, 0, length $cpath;	502	next unless $cpath eq substr $path, 0, length $cpath;
442		503
443	while (my ($cookie, $kv) = each %$cookies) {	504	while (my ($cookie, $kv) = each %$cookies) {
444	next if $uscheme ne "https" && exists $kv->{secure};	505	next if $scheme ne "https" && exists $kv->{secure};
445		506
446	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {	507	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
447	delete $cookies->{$cookie};	508	delete $cookies->{$cookie};
448	next;	509	next;
449	}	510	}
…		…
463	\@cookies	524	\@cookies
464	}	525	}
465		526
466	# parse set_cookie header into jar	527	# parse set_cookie header into jar
467	sub cookie_jar_set_cookie($$$$) {	528	sub cookie_jar_set_cookie($$$$) {
468	my ($jar, $set_cookie, $uhost, $date) = @_;	529	my ($jar, $set_cookie, $host, $date) = @_;
469		530
470	my $anow = int AE::now;	531	my $anow = int AE::now;
471	my $snow; # server-now	532	my $snow; # server-now
472		533
473	for ($set_cookie) {	534	for ($set_cookie) {
…		…
479	while (	540	while (
480	m{	541	m{
481	\G\s*	542	\G\s*
482	(?:	543	(?:
483	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)	544	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
484	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) ) )?	545	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^;,[:space:]]) ) )?
485	)	546	)
486	}gcxsi	547	}gcxsi
487	) {	548	) {
488	my $name = $2;	549	my $name = $2;
489	my $value = $4;	550	my $value = $4;
…		…
496	# quoted	557	# quoted
497	$value = $3;	558	$value = $3;
498	$value =~ s/\\(.)/$1/gs;	559	$value =~ s/\\(.)/$1/gs;
499	}	560	}
500		561
501	push @kv, lc $name, $value;	562	push @kv, @kv ? lc $name : $name, $value;
502		563
503	last unless /\G\s*;/gc;	564	last unless /\G\s*;/gc;
504	}	565	}
505		566
506	last unless @kv;	567	last unless @kv;
…		…
529		590
530	# this is not rfc-like and not netscape-like. go figure.	591	# this is not rfc-like and not netscape-like. go figure.
531	my $ndots = $cdom =~ y/.//;	592	my $ndots = $cdom =~ y/.//;
532	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	593	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
533	} else {	594	} else {
534	$cdom = $uhost;	595	$cdom = $host;
535	}	596	}
536		597
537	# store it	598	# store it
538	$jar->{version} = 1;	599	$jar->{version} = 1;
539	$jar->{lc $cdom}{$cpath}{$name} = \%kv;	600	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
540		601
541	redo if /\G\s*,/gc;	602	redo if /\G\s*,/gc;
542	}	603	}
543	}	604	}
544		605
		606	#############################################################################
		607	# keepalive/persistent connection cache
		608
		609	# fetch a connection from the keepalive cache
		610	sub ka_fetch($) {
		611	my $ka_key = shift;
		612
		613	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		614	delete $KA_CACHE{$ka_key}
		615	unless @{ $KA_CACHE{$ka_key} };
		616
		617	$hdl
		618	}
		619
		620	sub ka_store($$) {
		621	my ($ka_key, $hdl) = @_;
		622
		623	my $kaa = $KA_CACHE{$ka_key} \|\|= [];
		624
		625	my $destroy = sub {
		626	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		627
		628	$hdl->destroy;
		629
		630	@ka
		631	? $KA_CACHE{$ka_key} = \@ka
		632	: delete $KA_CACHE{$ka_key};
		633	};
		634
		635	# on error etc., destroy
		636	$hdl->on_error ($destroy);
		637	$hdl->on_eof ($destroy);
		638	$hdl->on_read ($destroy);
		639	$hdl->timeout ($PERSISTENT_TIMEOUT);
		640
		641	push @$kaa, $hdl;
		642	shift @$kaa while @$kaa > $MAX_PER_HOST;
		643	}
		644
		645	#############################################################################
		646	# utilities
		647
545	# continue to parse $_ for headers and place them into the arg	648	# continue to parse $_ for headers and place them into the arg
546	sub parse_hdr() {	649	sub _parse_hdr() {
547	my %hdr;	650	my %hdr;
548		651
549	# things seen, not parsed:	652	# things seen, not parsed:
550	# p3pP="NON CUR OTPi OUR NOR UNI"	653	# p3pP="NON CUR OTPi OUR NOR UNI"
551		654
…		…
565	for values %hdr;	668	for values %hdr;
566		669
567	\%hdr	670	\%hdr
568	}	671	}
569		672
		673	#############################################################################
		674	# http_get
		675
570	our $qr_nlnl = qr{(?<![^\012])\015?\012};	676	our $qr_nlnl = qr{(?<![^\012])\015?\012};
571		677
572	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	678	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
573	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	679	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		680
		681	# maybe it should just become a normal object :/
		682
		683	sub _destroy_state(\%) {
		684	my ($state) = @_;
		685
		686	$state->{handle}->destroy if $state->{handle};
		687	%$state = ();
		688	}
		689
		690	sub _error(\%$$) {
		691	my ($state, $cb, $hdr) = @_;
		692
		693	&_destroy_state ($state);
		694
		695	$cb->(undef, $hdr);
		696	()
		697	}
		698
		699	our %IDEMPOTENT = (
		700	DELETE => 1,
		701	GET => 1,
		702	HEAD => 1,
		703	OPTIONS => 1,
		704	PUT => 1,
		705	TRACE => 1,
		706
		707	ACL => 1,
		708	"BASELINE-CONTROL" => 1,
		709	BIND => 1,
		710	CHECKIN => 1,
		711	CHECKOUT => 1,
		712	COPY => 1,
		713	LABEL => 1,
		714	LINK => 1,
		715	MERGE => 1,
		716	MKACTIVITY => 1,
		717	MKCALENDAR => 1,
		718	MKCOL => 1,
		719	MKREDIRECTREF => 1,
		720	MKWORKSPACE => 1,
		721	MOVE => 1,
		722	ORDERPATCH => 1,
		723	PROPFIND => 1,
		724	PROPPATCH => 1,
		725	REBIND => 1,
		726	REPORT => 1,
		727	SEARCH => 1,
		728	UNBIND => 1,
		729	UNCHECKOUT => 1,
		730	UNLINK => 1,
		731	UNLOCK => 1,
		732	UPDATE => 1,
		733	UPDATEREDIRECTREF => 1,
		734	"VERSION-CONTROL" => 1,
		735	);
574		736
575	sub http_request($$@) {	737	sub http_request($$@) {
576	my $cb = pop;	738	my $cb = pop;
577	my ($method, $url, %arg) = @_;	739	my ($method, $url, %arg) = @_;
578		740
…		…
596	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	758	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
597		759
598	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	760	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
599	if $recurse < 0;	761	if $recurse < 0;
600		762
601	my $proxy = $arg{proxy} \|\| $PROXY;	763	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
602	my $timeout = $arg{timeout} \|\| $TIMEOUT;	764	my $timeout = $arg{timeout} \|\| $TIMEOUT;
603		765
604	my ($uscheme, $uauthority, $upath, $query, $fragment) =	766	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
605	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;	767	$url =~ m\|^([^:]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
606		768
607	$uscheme = lc $uscheme;	769	$uscheme = lc $uscheme;
608		770
609	my $uport = $uscheme eq "http" ? 80	771	my $uport = $uscheme eq "http" ? 80
610	: $uscheme eq "https" ? 443	772	: $uscheme eq "https" ? 443
…		…
654	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	816	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
655		817
656	$hdr{"content-length"} = length $arg{body}	818	$hdr{"content-length"} = length $arg{body}
657	if length $arg{body} \|\| $method ne "GET";	819	if length $arg{body} \|\| $method ne "GET";
658		820
659	my $idempotent = $method =~ /^(?:GET\|HEAD\|PUT\|DELETE\|OPTIONS\|TRACE)$/;	821	my $idempotent = $IDEMPOTENT{$method};
660		822
661	# default value for keepalive is true iff the request is for an idempotent method	823	# default value for keepalive is true iff the request is for an idempotent method
662	my $keepalive = exists $arg{keepalive}	824	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
663	? $arg{keepalive}*1	825	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
664	: $idempotent ? $PERSISTENT_TIMEOUT : 0;	826	my $was_persistent; # true if this is actually a recycled connection
665		827
		828	# the key to use in the keepalive cache
		829	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		830
666	$hdr{connection} = ($keepalive ? "" : "close ") . "Te"; #1.1	831	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
667	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	832	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
668		833
669	my %state = (connect_guard => 1);	834	my %state = (connect_guard => 1);
670		835
671	my $ae_error = 595; # connecting	836	my $ae_error = 595; # connecting
672		837
673	# handle actual, non-tunneled, request	838	# handle actual, non-tunneled, request
674	my $handle_actual_request = sub {	839	my $handle_actual_request = sub {
675	$ae_error = 596; # request phase	840	$ae_error = 596; # request phase
676		841
		842	my $hdl = $state{handle};
		843
677	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};	844	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
678		845
679	# send request	846	# send request
680	$state{handle}->push_write (	847	$hdl->push_write (
681	"$method $rpath HTTP/1.1\015\012"	848	"$method $rpath HTTP/1.1\015\012"
682	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)	849	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
683	. "\015\012"	850	. "\015\012"
684	. (delete $arg{body})	851	. $arg{body}
685	);	852	);
686		853
687	# return if error occured during push_write()	854	# return if error occurred during push_write()
688	return unless %state;	855	return unless %state;
689		856
690	# reduce memory usage, save a kitten, also re-use it for the response headers.	857	# reduce memory usage, save a kitten, also re-use it for the response headers.
691	%hdr = ();	858	%hdr = ();
692		859
693	# status line and headers	860	# status line and headers
694	$state{read_response} = sub {	861	$state{read_response} = sub {
		862	return unless %state;
		863
695	for ("$_[1]") {	864	for ("$_[1]") {
696	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	865	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
697		866
698	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci	867	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
699	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));	868	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
700		869
701	# 100 Continue handling	870	# 100 Continue handling
702	# should not happen as we don't send expect: 100-continue,	871	# should not happen as we don't send expect: 100-continue,
703	# but we handle it just in case.	872	# but we handle it just in case.
704	# since we send the request body regardless, if we get an error	873	# since we send the request body regardless, if we get an error
…		…
710	HTTPVersion => $1,	879	HTTPVersion => $1,
711	Status => $2,	880	Status => $2,
712	Reason => $3,	881	Reason => $3,
713	;	882	;
714		883
715	my $hdr = parse_hdr	884	my $hdr = _parse_hdr
716	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));	885	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
717		886
718	%hdr = (%$hdr, @pseudo);	887	%hdr = (%$hdr, @pseudo);
719	}	888	}
720		889
721	# redirect handling	890	# redirect handling
722	# microsoft and other shitheads don't give a shit for following standards,	891	# relative uri handling forced by microsoft and other shitheads.
723	# try to support some common forms of broken Location headers.	892	# we give our best and fall back to URI if available.
724	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {	893	if (exists $hdr{location}) {
		894	my $loc = $hdr{location};
		895
		896	if ($loc =~ m%^//%) { # //
		897	$loc = "$rscheme:$loc";
		898
		899	} elsif ($loc eq "") {
		900	$loc = $url;
		901
		902	} elsif ($loc !~ /^(?: $ \| [^:\/?\#]+ : )/x) { # anything "simple"
725	$hdr{location} =~ s/^\.\/+//;	903	$loc =~ s/^\.\/+//;
726		904
		905	if ($loc !~ m%^[.?#]%) {
727	my $url = "$rscheme://$uhost:$uport";	906	my $prefix = "$rscheme://$uhost:$uport";
728		907
729	unless ($hdr{location} =~ s/^\///) {	908	unless ($loc =~ s/^\///) {
730	$url .= $upath;	909	$prefix .= $upath;
731	$url =~ s/\/[^\/]*$//;	910	$prefix =~ s/\/[^\/]*$//;
		911	}
		912
		913	$loc = "$prefix/$loc";
		914
		915	} elsif (eval { require URI }) { # uri
		916	$loc = URI->new_abs ($loc, $url)->as_string;
		917
		918	} else {
		919	return _error %state, $cb, { @pseudo, Status => 599, Reason => "Cannot parse Location (URI module missing)" };
		920	#$hdr{Status} = 599;
		921	#$hdr{Reason} = "Unparsable Redirect (URI module missing)";
		922	#$recurse = 0;
		923	}
732	}	924	}
733		925
734	$hdr{location} = "$url/$hdr{location}";	926	$hdr{location} = $loc;
735	}	927	}
736		928
737	my $redirect;	929	my $redirect;
738		930
739	if ($recurse) {	931	if ($recurse) {
…		…
741		933
742	# industry standard is to redirect POST as GET for	934	# industry standard is to redirect POST as GET for
743	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.	935	# 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,	936	# also, the UA should ask the user for 301 and 307 and POST,
745	# industry standard seems to be to simply follow.	937	# industry standard seems to be to simply follow.
746	# we go with the industry standard.	938	# we go with the industry standard. 308 is defined
		939	# by rfc7238
747	if ($status == 301 or $status == 302 or $status == 303) {	940	if ($status == 301 or $status == 302 or $status == 303) {
748	# HTTP/1.1 is unclear on how to mutate the method	941	# HTTP/1.1 is unclear on how to mutate the method
749	$method = "GET" unless $method eq "HEAD";	942	$method = "GET" unless $method eq "HEAD";
750	$redirect = 1;	943	$redirect = 1;
751	} elsif ($status == 307) {	944	} elsif ($status == 307 or $status == 308) {
752	$redirect = 1;	945	$redirect = 1;
753	}	946	}
754	}	947	}
755		948
756	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])	949	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
757	my $may_keep_alive = $_[3];	950	if ($state{handle}) {
758		951	# handle keepalive
		952	if (
		953	$persistent
		954	&& $_[3]
		955	&& ($hdr{HTTPVersion} < 1.1
		956	? $hdr{connection} =~ /\bkeep-?alive\b/i
		957	: $hdr{connection} !~ /\bclose\b/i)
		958	) {
		959	ka_store $ka_key, delete $state{handle};
		960	} else {
		961	# no keepalive, destroy the handle
759	$state{handle}->destroy if $state{handle};	962	$state{handle}->destroy;
		963	}
		964	}
		965
760	%state = ();	966	%state = ();
761		967
762	if (defined $_[1]) {	968	if (defined $_[1]) {
763	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];	969	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
764	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];	970	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
…		…
771		977
772	if ($redirect && exists $hdr{location}) {	978	if ($redirect && exists $hdr{location}) {
773	# we ignore any errors, as it is very common to receive	979	# we ignore any errors, as it is very common to receive
774	# Content-Length != 0 but no actual body	980	# Content-Length != 0 but no actual body
775	# we also access %hdr, as $_[1] might be an erro	981	# we also access %hdr, as $_[1] might be an erro
		982	$state{recurse} =
776	http_request (	983	http_request (
777	$method => $hdr{location},	984	$method => $hdr{location},
778	%arg,	985	%arg,
779	recurse => $recurse - 1,	986	recurse => $recurse - 1,
780	Redirect => [$_[0], \%hdr],	987	Redirect => [$_[0], \%hdr],
		988	sub {
		989	%state = ();
		990	&$cb
		991	},
781	$cb);	992	);
782	} else {	993	} else {
783	$cb->($_[0], \%hdr);	994	$cb->($_[0], \%hdr);
784	}	995	}
785	};	996	};
786		997
…		…
813		1024
814	$finish->(delete $state{handle});	1025	$finish->(delete $state{handle});
815		1026
816	} elsif ($chunked) {	1027	} elsif ($chunked) {
817	my $cl = 0;	1028	my $cl = 0;
818	my $body = undef;	1029	my $body = "";
819	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };	1030	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
820		1031
821	$state{read_chunk} = sub {	1032	$state{read_chunk} = sub {
822	$_[1] =~ /^([0-9a-fA-F]+)/	1033	$_[1] =~ /^([0-9a-fA-F]+)/
823	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");	1034	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
824		1035
825	my $len = hex $1;	1036	my $len = hex $1;
826		1037
827	if ($len) {	1038	if ($len) {
828	$cl += $len;	1039	$cl += $len;
…		…
843	$_[0]->push_read (line => $qr_nlnl, sub {	1054	$_[0]->push_read (line => $qr_nlnl, sub {
844	if (length $_[1]) {	1055	if (length $_[1]) {
845	for ("$_[1]") {	1056	for ("$_[1]") {
846	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	1057	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
847		1058
848	my $hdr = parse_hdr	1059	my $hdr = _parse_hdr
849	or return $finish->(undef, $ae_error => "Garbled response trailers");	1060	or return $finish->(undef, $ae_error => "Garbled response trailers");
850		1061
851	%hdr = (%hdr, %$hdr);	1062	%hdr = (%hdr, %$hdr);
852	}	1063	}
853	}	1064	}
…		…
896	$_[0]->on_read (sub { });	1107	$_[0]->on_read (sub { });
897	}	1108	}
898	}	1109	}
899	};	1110	};
900		1111
		1112	# if keepalive is enabled, then the server closing the connection
		1113	# before a response can happen legally - we retry on idempotent methods.
		1114	if ($was_persistent && $idempotent) {
		1115	my $old_eof = $hdl->{on_eof};
		1116	$hdl->{on_eof} = sub {
		1117	_destroy_state %state;
		1118
		1119	%state = ();
		1120	$state{recurse} =
		1121	http_request (
		1122	$method => $url,
		1123	%arg,
		1124	recurse => $recurse - 1,
		1125	keepalive => 0,
		1126	sub {
		1127	%state = ();
		1128	&$cb
		1129	}
		1130	);
		1131	};
		1132	$hdl->on_read (sub {
		1133	return unless %state;
		1134
		1135	# as soon as we receive something, a connection close
		1136	# once more becomes a hard error
		1137	$hdl->{on_eof} = $old_eof;
		1138	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1139	});
		1140	} else {
901	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});	1141	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1142	}
902	};	1143	};
903		1144
		1145	my $prepare_handle = sub {
		1146	my ($hdl) = $state{handle};
		1147
		1148	$hdl->on_error (sub {
		1149	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1150	});
		1151	$hdl->on_eof (sub {
		1152	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1153	});
		1154	$hdl->timeout_reset;
		1155	$hdl->timeout ($timeout);
		1156	};
		1157
		1158	# connected to proxy (or origin server)
904	my $connect_cb = sub {	1159	my $connect_cb = sub {
905	$state{fh} = shift	1160	my $fh = shift
906	or do {
907	my $err = "$!";
908	%state = ();
909	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });	1161	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
910	};
911		1162
912	return unless delete $state{connect_guard};	1163	return unless delete $state{connect_guard};
913		1164
914	# get handle	1165	# get handle
915	$state{handle} = new AnyEvent::Handle	1166	$state{handle} = new AnyEvent::Handle
		1167	%{ $arg{handle_params} },
916	fh => $state{fh},	1168	fh => $fh,
917	peername => $rhost,	1169	peername => $uhost,
918	tls_ctx => $arg{tls_ctx},	1170	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	;	1171	;
930		1172
931	# limit the number of persistent connections	1173	$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		1174
941	$state{handle}->starttls ("connect") if $rscheme eq "https";	1175	#$state{handle}->starttls ("connect") if $rscheme eq "https";
942		1176
943	# now handle proxy-CONNECT method	1177	# now handle proxy-CONNECT method
944	if ($proxy && $uscheme eq "https") {	1178	if ($proxy && $uscheme eq "https") {
945	# oh dear, we have to wrap it into a connect request	1179	# oh dear, we have to wrap it into a connect request
946		1180
947	# maybe re-use $uauthority with patched port?	1181	# maybe re-use $uauthority with patched port?
948	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");	1182	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");
949	$state{handle}->push_read (line => $qr_nlnl, sub {	1183	$state{handle}->push_read (line => $qr_nlnl, sub {
950	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix	1184	$_[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])" }));	1185	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
952		1186
953	if ($2 == 200) {	1187	if ($2 == 200) {
954	$rpath = $upath;	1188	$rpath = $upath;
955	$handle_actual_request->();	1189	$handle_actual_request->();
956	} else {	1190	} else {
957	%state = ();
958	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });	1191	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
959	}	1192	}
960	});	1193	});
961	} else {	1194	} else {
962	$handle_actual_request->();	1195	$handle_actual_request->();
963	}	1196	}
…		…
966	_get_slot $uhost, sub {	1199	_get_slot $uhost, sub {
967	$state{slot_guard} = shift;	1200	$state{slot_guard} = shift;
968		1201
969	return unless $state{connect_guard};	1202	return unless $state{connect_guard};
970		1203
		1204	# try to use an existing keepalive connection, but only if we, ourselves, plan
		1205	# on a keepalive request (in theory, this should be a separate config option).
		1206	if ($persistent && $KA_CACHE{$ka_key}) {
		1207	$was_persistent = 1;
		1208
		1209	$state{handle} = ka_fetch $ka_key;
		1210	$state{handle}->destroyed
		1211	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
		1212	$prepare_handle->();
		1213	$state{handle}->destroyed
		1214	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
		1215	$handle_actual_request->();
		1216
		1217	} else {
971	my $tcp_connect = $arg{tcp_connect}	1218	my $tcp_connect = $arg{tcp_connect}
972	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1219	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
973		1220
974	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });	1221	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		1222	}
975	};	1223	};
976		1224
977	defined wantarray && AnyEvent::Util::guard { %state = () }	1225	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
978	}	1226	}
979		1227
980	sub http_get($@) {	1228	sub http_get($@) {
981	unshift @_, "GET";	1229	unshift @_, "GET";
982	&http_request	1230	&http_request
…		…
1000	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1248	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
1001	the actual connection, which in turn uses AnyEvent::DNS to resolve	1249	the actual connection, which in turn uses AnyEvent::DNS to resolve
1002	hostnames. The latter is a simple stub resolver and does no caching	1250	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	1251	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	1252	your own default resolver (by storing a suitable resolver object in
1005	C<$AnyEvent::DNS::RESOLVER>).	1253	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
1006		1254
1007	=head2 GLOBAL FUNCTIONS AND VARIABLES	1255	=head2 GLOBAL FUNCTIONS AND VARIABLES
1008		1256
1009	=over 4	1257	=over 4
1010		1258
1011	=item AnyEvent::HTTP::set_proxy "proxy-url"	1259	=item AnyEvent::HTTP::set_proxy "proxy-url"
1012		1260
1013	Sets the default proxy server to use. The proxy-url must begin with a	1261	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	1262	string of the form C<http://host:port>, croaks otherwise.
1015	otherwise.
1016		1263
1017	To clear an already-set proxy, use C<undef>.	1264	To clear an already-set proxy, use C<undef>.
		1265
		1266	When AnyEvent::HTTP is loaded for the first time it will query the
		1267	default proxy from the operating system, currently by looking at
		1268	C<$ENV{http_proxy>}.
1018		1269
1019	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]	1270	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
1020		1271
1021	Remove all cookies from the cookie jar that have been expired. If	1272	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	1273	C<$session_end> is given and true, then additionally remove all session
1023	cookies.	1274	cookies.
1024		1275
1025	You should call this function (with a true C<$session_end>) before you	1276	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	1277	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	1278	again. If you have a long-running program you can additionally call this
1028	function from time to time.	1279	function from time to time.
1029		1280
1030	A cookie jar is initially an empty hash-reference that is managed by this	1281	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:	1282	module. It's format is subject to change, but currently it is like this:
1032		1283
1033	The key C<version> has to contain C<1>, otherwise the hash gets	1284	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	1285	emptied. All other keys are hostnames or IP addresses pointing to
1035	hash-references. The key for these inner hash references is the	1286	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	1287	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	1288	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	1289	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>,	1290	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	1291	which have been replaced by a C<_expires> key that contains the cookie
1041	expiry timestamp.	1292	expiry timestamp. Session cookies are indicated by not having an
		1293	C<_expires> key.
1042		1294
1043	Here is an example of a cookie jar with a single cookie, so you have a	1295	Here is an example of a cookie jar with a single cookie, so you have a
1044	chance of understanding the above paragraph:	1296	chance of understanding the above paragraph:
1045		1297
1046	{	1298	{
…		…
1068		1320
1069	=item $AnyEvent::HTTP::MAX_RECURSE	1321	=item $AnyEvent::HTTP::MAX_RECURSE
1070		1322
1071	The default value for the C<recurse> request parameter (default: C<10>).	1323	The default value for the C<recurse> request parameter (default: C<10>).
1072		1324
		1325	=item $AnyEvent::HTTP::TIMEOUT
		1326
		1327	The default timeout for connection operations (default: C<300>).
		1328
1073	=item $AnyEvent::HTTP::USERAGENT	1329	=item $AnyEvent::HTTP::USERAGENT
1074		1330
1075	The default value for the C<User-Agent> header (the default is	1331	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)>).	1332	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
1077		1333
1078	=item $AnyEvent::HTTP::MAX_PER_HOST	1334	=item $AnyEvent::HTTP::MAX_PER_HOST
1079		1335
1080	The maximum number of concurrent connections to the same host (identified	1336	The maximum number of concurrent connections to the same host (identified
1081	by the hostname). If the limit is exceeded, then the additional requests	1337	by the hostname). If the limit is exceeded, then the additional requests
1082	are queued until previous connections are closed.	1338	are queued until previous connections are closed. Both persistent and
		1339	non-persistent connections are counted in this limit.
1083		1340
1084	The default value for this is C<4>, and it is highly advisable to not	1341	The default value for this is C<4>, and it is highly advisable to not
1085	increase it.	1342	increase it much.
		1343
		1344	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1345	connections, older browsers used 2, newer ones (such as firefox 3)
		1346	typically use 6, and Opera uses 8 because like, they have the fastest
		1347	browser and give a shit for everybody else on the planet.
		1348
		1349	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1350
		1351	The time after which idle persistent connections get closed by
		1352	AnyEvent::HTTP (default: C<3>).
1086		1353
1087	=item $AnyEvent::HTTP::ACTIVE	1354	=item $AnyEvent::HTTP::ACTIVE
1088		1355
1089	The number of active connections. This is not the number of currently	1356	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	1357	running requests, but the number of currently open and non-idle TCP
1091	connections. This number of can be useful for load-leveling.	1358	connections. This number can be useful for load-leveling.
1092		1359
1093	=back	1360	=back
1094		1361
1095	=cut	1362	=cut
1096		1363
…		…
1130	# other formats fail in the loop below	1397	# other formats fail in the loop below
1131		1398
1132	for (0..11) {	1399	for (0..11) {
1133	if ($m eq $month[$_]) {	1400	if ($m eq $month[$_]) {
1134	require Time::Local;	1401	require Time::Local;
1135	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1402	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
1136	}	1403	}
1137	}	1404	}
1138		1405
1139	undef	1406	undef
1140	}	1407	}
1141		1408
1142	sub set_proxy($) {	1409	sub set_proxy($) {
1143	if (length $_[0]) {	1410	if (length $_[0]) {
1144	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1411	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1145	or Carp::croak "$_[0]: invalid proxy URL";	1412	or Carp::croak "$_[0]: invalid proxy URL";
1146	$PROXY = [$2, $3 \|\| 3128, $1]	1413	$PROXY = [$2, $3 \|\| 3128, $1]
1147	} else {	1414	} else {
1148	undef $PROXY;	1415	undef $PROXY;
1149	}	1416	}
…		…
1152	# initialise proxy from environment	1419	# initialise proxy from environment
1153	eval {	1420	eval {
1154	set_proxy $ENV{http_proxy};	1421	set_proxy $ENV{http_proxy};
1155	};	1422	};
1156		1423
		1424	=head2 SHOWCASE
		1425
		1426	This section contains some more elaborate "real-world" examples or code
		1427	snippets.
		1428
		1429	=head2 HTTP/1.1 FILE DOWNLOAD
		1430
		1431	Downloading files with HTTP can be quite tricky, especially when something
		1432	goes wrong and you want to resume.
		1433
		1434	Here is a function that initiates and resumes a download. It uses the
		1435	last modified time to check for file content changes, and works with many
		1436	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1437	on older servers.
		1438
		1439	It calls the completion callback with either C<undef>, which means a
		1440	nonretryable error occurred, C<0> when the download was partial and should
		1441	be retried, and C<1> if it was successful.
		1442
		1443	use AnyEvent::HTTP;
		1444
		1445	sub download($$$) {
		1446	my ($url, $file, $cb) = @_;
		1447
		1448	open my $fh, "+<", $file
		1449	or die "$file: $!";
		1450
		1451	my %hdr;
		1452	my $ofs = 0;
		1453
		1454	warn stat $fh;
		1455	warn -s _;
		1456	if (stat $fh and -s _) {
		1457	$ofs = -s _;
		1458	warn "-s is ", $ofs;
		1459	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1460	$hdr{"range"} = "bytes=$ofs-";
		1461	}
		1462
		1463	http_get $url,
		1464	headers => \%hdr,
		1465	on_header => sub {
		1466	my ($hdr) = @_;
		1467
		1468	if ($hdr->{Status} == 200 && $ofs) {
		1469	# resume failed
		1470	truncate $fh, $ofs = 0;
		1471	}
		1472
		1473	sysseek $fh, $ofs, 0;
		1474
		1475	1
		1476	},
		1477	on_body => sub {
		1478	my ($data, $hdr) = @_;
		1479
		1480	if ($hdr->{Status} =~ /^2/) {
		1481	length $data == syswrite $fh, $data
		1482	or return; # abort on write errors
		1483	}
		1484
		1485	1
		1486	},
		1487	sub {
		1488	my (undef, $hdr) = @_;
		1489
		1490	my $status = $hdr->{Status};
		1491
		1492	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1493	utime $fh, $time, $time;
		1494	}
		1495
		1496	if ($status == 200 \|\| $status == 206 \|\| $status == 416) {
		1497	# download ok \|\| resume ok \|\| file already fully downloaded
		1498	$cb->(1, $hdr);
		1499
		1500	} elsif ($status == 412) {
		1501	# file has changed while resuming, delete and retry
		1502	unlink $file;
		1503	$cb->(0, $hdr);
		1504
		1505	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1506	# retry later
		1507	$cb->(0, $hdr);
		1508
		1509	} else {
		1510	$cb->(undef, $hdr);
		1511	}
		1512	}
		1513	;
		1514	}
		1515
		1516	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1517	if ($_[0]) {
		1518	print "OK!\n";
		1519	} elsif (defined $_[0]) {
		1520	print "please retry later\n";
		1521	} else {
		1522	print "ERROR\n";
		1523	}
		1524	};
		1525
1157	=head2 SOCKS PROXIES	1526	=head3 SOCKS PROXIES
1158		1527
1159	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1528	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	1529	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	1530	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
1162	transparently.	1531	transparently.

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.91 by root, Mon Jan 3 01:03:29 2011 UTC vs. Revision 1.120 by root, Sun Jun 8 23:36:36 2014 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.91 by root, Mon Jan 3 01:03:29 2011 UTC vs.
Revision 1.120 by root, Sun Jun 8 23:36:36 2014 UTC