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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.90 by root, Mon Jan 3 00:41:25 2011 UTC vs.
Revision 1.118 by root, Mon Nov 18 01:01:02 2013 UTC

…		…
15	This module is an L<AnyEvent> user, you need to make sure that you use and	15	This module is an L<AnyEvent> user, you need to make sure that you use and
16	run a supported event loop.	16	run a supported event loop.
17		17
18	This module implements a simple, stateless and non-blocking HTTP	18	This module implements a simple, stateless and non-blocking HTTP
19	client. It supports GET, POST and other request methods, cookies and more,	19	client. It supports GET, POST and other request methods, cookies and more,
20	all on a very low level. It can follow redirects supports proxies and	20	all on a very low level. It can follow redirects, supports proxies, and
21	automatically limits the number of connections to the values specified in	21	automatically limits the number of connections to the values specified in
22	the RFC.	22	the RFC.
23		23
24	It should generally be a "good client" that is enough for most HTTP	24	It should generally be a "good client" that is enough for most HTTP
25	tasks. Simple tasks should be simple, but complex tasks should still be	25	tasks. Simple tasks should be simple, but complex tasks should still be
…		…
46	use AnyEvent::Util ();	46	use AnyEvent::Util ();
47	use AnyEvent::Handle ();	47	use AnyEvent::Handle ();
48		48
49	use base Exporter::;	49	use base Exporter::;
50		50
51	our $VERSION = '1.5';	51	our $VERSION = '2.15';
52		52
53	our @EXPORT = qw(http_get http_post http_head http_request);	53	our @EXPORT = qw(http_get http_post http_head http_request);
54		54
55	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	55	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
56	our $MAX_RECURSE = 10;	56	our $MAX_RECURSE = 10;
57	our $MAX_PERSISTENT = 8;
58	our $PERSISTENT_TIMEOUT = 2;	57	our $PERSISTENT_TIMEOUT = 3;
59	our $TIMEOUT = 300;	58	our $TIMEOUT = 300;
60		59	our $MAX_PER_HOST = 4; # changing this is evil
61	# changing these is evil
62	our $MAX_PERSISTENT_PER_HOST = 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.
165		161
166	=item headers => hashref	162	=item headers => hashref
167		163
168	The request headers to use. Currently, C<http_request> may provide its own	164	The request headers to use. Currently, C<http_request> may provide its own
169	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and	165	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
…		…
173		169
174	You really should provide your own C<User-Agent:> header value that is	170	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	171	appropriate for your program - I wouldn't be surprised if the default
176	AnyEvent string gets blocked by webservers sooner or later.	172	AnyEvent string gets blocked by webservers sooner or later.
177		173
		174	Also, make sure that your headers names and values do not contain any
		175	embedded newlines.
		176
178	=item timeout => $seconds	177	=item timeout => $seconds
179		178
180	The time-out to use for various stages - each connect attempt will reset	179	The time-out to use for various stages - each connect attempt will reset
181	the timeout, as will read or write activity, i.e. this is not an overall	180	the timeout, as will read or write activity, i.e. this is not an overall
182	timeout.	181	timeout.
183		182
184	Default timeout is 5 minutes.	183	Default timeout is 5 minutes.
185		184
186	=item proxy => [$host, $port[, $scheme]] or undef	185	=item proxy => [$host, $port[, $scheme]] or undef
187		186
188	Use the given http proxy for all requests. If not specified, then the	187	Use the given http proxy for all requests, or no proxy if C<undef> is
189	default proxy (as specified by C<$ENV{http_proxy}>) is used.	188	used.
190		189
191	C<$scheme> must be either missing, C<http> for HTTP or C<https> for	190	C<$scheme> must be either missing or must be C<http> for HTTP.
192	HTTPS.	191
		192	If not specified, then the default proxy is used (see
		193	C<AnyEvent::HTTP::set_proxy>).
193		194
194	=item body => $string	195	=item body => $string
195		196
196	The request body, usually empty. Will be sent as-is (future versions of	197	The request body, usually empty. Will be sent as-is (future versions of
197	this module might offer more options).	198	this module might offer more options).
…		…
228	verification) TLS context.	229	verification) TLS context.
229		230
230	The default for this option is C<low>, which could be interpreted as "give	231	The default for this option is C<low>, which could be interpreted as "give
231	me the page, no matter what".	232	me the page, no matter what".
232		233
		234	See also the C<sessionid> parameter.
		235
		236	=item session => $string
		237
		238	The module might reuse connections to the same host internally. Sometimes
		239	(e.g. when using TLS), you do not want to reuse connections from other
		240	sessions. This can be achieved by setting this parameter to some unique
		241	ID (such as the address of an object storing your state data, or the TLS
		242	context) - only connections using the same unique ID will be reused.
		243
233	=item on_prepare => $callback->($fh)	244	=item on_prepare => $callback->($fh)
234		245
235	In rare cases you need to "tune" the socket before it is used to	246	In rare cases you need to "tune" the socket before it is used to
236	connect (for exmaple, to bind it on a given IP address). This parameter	247	connect (for example, to bind it on a given IP address). This parameter
237	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	248	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	249	and behaves exactly the same way (e.g. it has to provide a
239	timeout). See the description for the C<$prepare_cb> argument of	250	timeout). See the description for the C<$prepare_cb> argument of
240	C<AnyEvent::Socket::tcp_connect> for details.	251	C<AnyEvent::Socket::tcp_connect> for details.
241		252
…		…
306	called. Instead of the C<$body> argument containing the body data, the	317	called. Instead of the C<$body> argument containing the body data, the
307	callback will receive the L<AnyEvent::Handle> object associated with the	318	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	319	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.	320	(e.g. status C<304>), the empty string will be passed.
310		321
311	The handle object might or might not be in TLS mode, might be connected to	322	The handle object might or might not be in TLS mode, might be connected
312	a proxy, be a persistent connection etc., and configured in unspecified	323	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	324	etc., and configured in unspecified ways. The user is responsible for this
314	module anymore).	325	handle (it will not be used by this module anymore).
315		326
316	This is useful with some push-type services, where, after the initial	327	This is useful with some push-type services, where, after the initial
317	headers, an interactive protocol is used (typical example would be the	328	headers, an interactive protocol is used (typical example would be the
318	push-style twitter API which starts a JSON/XML stream).	329	push-style twitter API which starts a JSON/XML stream).
319		330
320	If you think you need this, first have a look at C<on_body>, to see if	331	If you think you need this, first have a look at C<on_body>, to see if
321	that doesn't solve your problem in a better way.	332	that doesn't solve your problem in a better way.
		333
		334	=item persistent => $boolean
		335
		336	Try to create/reuse a persistent connection. When this flag is set
		337	(default: true for idempotent requests, false for all others), then
		338	C<http_request> tries to re-use an existing (previously-created)
		339	persistent connection to the host and, failing that, tries to create a new
		340	one.
		341
		342	Requests failing in certain ways will be automatically retried once, which
		343	is dangerous for non-idempotent requests, which is why it defaults to off
		344	for them. The reason for this is because the bozos who designed HTTP/1.1
		345	made it impossible to distinguish between a fatal error and a normal
		346	connection timeout, so you never know whether there was a problem with
		347	your request or not.
		348
		349	When reusing an existent connection, many parameters (such as TLS context)
		350	will be ignored. See the C<session> parameter for a workaround.
		351
		352	=item keepalive => $boolean
		353
		354	Only used when C<persistent> is also true. This parameter decides whether
		355	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		356	(as opposed to only a HTTP/1.1 persistent connection).
		357
		358	The default is true, except when using a proxy, in which case it defaults
		359	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		360
		361	=item handle_params => { key => value ... }
		362
		363	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		364	constructor that is called - not all requests will create a handle, and
		365	sometimes more than one is created, so this parameter is only good for
		366	setting hints.
		367
		368	Example: set the maximum read size to 4096, to potentially conserve memory
		369	at the cost of speed.
		370
		371	handle_params => {
		372	max_read_size => 4096,
		373	},
322		374
323	=back	375	=back
324		376
325	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	377	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
326	the response body.	378	the response body.
…		…
332		384
333	Example: do a HTTP HEAD request on https://www.google.com/, use a	385	Example: do a HTTP HEAD request on https://www.google.com/, use a
334	timeout of 30 seconds.	386	timeout of 30 seconds.
335		387
336	http_request	388	http_request
337	GET => "https://www.google.com",	389	HEAD => "https://www.google.com",
338	headers => { "user-agent" => "MySearchClient 1.0" },	390	headers => { "user-agent" => "MySearchClient 1.0" },
339	timeout => 30,	391	timeout => 30,
340	sub {	392	sub {
341	my ($body, $hdr) = @_;	393	my ($body, $hdr) = @_;
342	use Data::Dumper;	394	use Data::Dumper;
…		…
353	};	405	};
354		406
355	undef $request;	407	undef $request;
356		408
357	=cut	409	=cut
		410
		411	#############################################################################
		412	# wait queue/slots
358		413
359	sub _slot_schedule;	414	sub _slot_schedule;
360	sub _slot_schedule($) {	415	sub _slot_schedule($) {
361	my $host = shift;	416	my $host = shift;
362		417
…		…
385		440
386	_slot_schedule $_[0];	441	_slot_schedule $_[0];
387	}	442	}
388		443
389	#############################################################################	444	#############################################################################
		445	# cookie handling
390		446
391	# expire cookies	447	# expire cookies
392	sub cookie_jar_expire($;$) {	448	sub cookie_jar_expire($;$) {
393	my ($jar, $session_end) = @_;	449	my ($jar, $session_end) = @_;
394		450
…		…
418	}	474	}
419	}	475	}
420		476
421	# extract cookies from jar	477	# extract cookies from jar
422	sub cookie_jar_extract($$$$) {	478	sub cookie_jar_extract($$$$) {
423	my ($jar, $uscheme, $uhost, $upath) = @_;	479	my ($jar, $scheme, $host, $path) = @_;
424		480
425	%$jar = () if $jar->{version} != 1;	481	%$jar = () if $jar->{version} != 1;
426		482
427	my @cookies;	483	my @cookies;
428		484
429	while (my ($chost, $paths) = each %$jar) {	485	while (my ($chost, $paths) = each %$jar) {
430	next unless ref $paths;	486	next unless ref $paths;
431		487
432	if ($chost =~ /^\./) {	488	if ($chost =~ /^\./) {
433	next unless $chost eq substr $uhost, -length $chost;	489	next unless $chost eq substr $host, -length $chost;
434	} elsif ($chost =~ /\./) {	490	} elsif ($chost =~ /\./) {
435	next unless $chost eq $uhost;	491	next unless $chost eq $host;
436	} else {	492	} else {
437	next;	493	next;
438	}	494	}
439		495
440	while (my ($cpath, $cookies) = each %$paths) {	496	while (my ($cpath, $cookies) = each %$paths) {
441	next unless $cpath eq substr $upath, 0, length $cpath;	497	next unless $cpath eq substr $path, 0, length $cpath;
442		498
443	while (my ($cookie, $kv) = each %$cookies) {	499	while (my ($cookie, $kv) = each %$cookies) {
444	next if $uscheme ne "https" && exists $kv->{secure};	500	next if $scheme ne "https" && exists $kv->{secure};
445		501
446	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {	502	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
447	delete $cookies->{$cookie};	503	delete $cookies->{$cookie};
448	next;	504	next;
449	}	505	}
…		…
463	\@cookies	519	\@cookies
464	}	520	}
465		521
466	# parse set_cookie header into jar	522	# parse set_cookie header into jar
467	sub cookie_jar_set_cookie($$$$) {	523	sub cookie_jar_set_cookie($$$$) {
468	my ($jar, $set_cookie, $uhost, $date) = @_;	524	my ($jar, $set_cookie, $host, $date) = @_;
469		525
470	my $anow = int AE::now;	526	my $anow = int AE::now;
471	my $snow; # server-now	527	my $snow; # server-now
472		528
473	for ($set_cookie) {	529	for ($set_cookie) {
…		…
479	while (	535	while (
480	m{	536	m{
481	\G\s*	537	\G\s*
482	(?:	538	(?:
483	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)	539	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
484	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) ) )?	540	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^;,[:space:]]) ) )?
485	)	541	)
486	}gcxsi	542	}gcxsi
487	) {	543	) {
488	my $name = $2;	544	my $name = $2;
489	my $value = $4;	545	my $value = $4;
…		…
496	# quoted	552	# quoted
497	$value = $3;	553	$value = $3;
498	$value =~ s/\\(.)/$1/gs;	554	$value =~ s/\\(.)/$1/gs;
499	}	555	}
500		556
501	push @kv, lc $name, $value;	557	push @kv, @kv ? lc $name : $name, $value;
502		558
503	last unless /\G\s*;/gc;	559	last unless /\G\s*;/gc;
504	}	560	}
505		561
506	last unless @kv;	562	last unless @kv;
…		…
529		585
530	# this is not rfc-like and not netscape-like. go figure.	586	# this is not rfc-like and not netscape-like. go figure.
531	my $ndots = $cdom =~ y/.//;	587	my $ndots = $cdom =~ y/.//;
532	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	588	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
533	} else {	589	} else {
534	$cdom = $uhost;	590	$cdom = $host;
535	}	591	}
536		592
537	# store it	593	# store it
538	$jar->{version} = 1;	594	$jar->{version} = 1;
539	$jar->{lc $cdom}{$cpath}{$name} = \%kv;	595	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
540		596
541	redo if /\G\s*,/gc;	597	redo if /\G\s*,/gc;
542	}	598	}
543	}	599	}
544		600
		601	#############################################################################
		602	# keepalive/persistent connection cache
		603
		604	# fetch a connection from the keepalive cache
		605	sub ka_fetch($) {
		606	my $ka_key = shift;
		607
		608	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		609	delete $KA_CACHE{$ka_key}
		610	unless @{ $KA_CACHE{$ka_key} };
		611
		612	$hdl
		613	}
		614
		615	sub ka_store($$) {
		616	my ($ka_key, $hdl) = @_;
		617
		618	my $kaa = $KA_CACHE{$ka_key} \|\|= [];
		619
		620	my $destroy = sub {
		621	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		622
		623	$hdl->destroy;
		624
		625	@ka
		626	? $KA_CACHE{$ka_key} = \@ka
		627	: delete $KA_CACHE{$ka_key};
		628	};
		629
		630	# on error etc., destroy
		631	$hdl->on_error ($destroy);
		632	$hdl->on_eof ($destroy);
		633	$hdl->on_read ($destroy);
		634	$hdl->timeout ($PERSISTENT_TIMEOUT);
		635
		636	push @$kaa, $hdl;
		637	shift @$kaa while @$kaa > $MAX_PER_HOST;
		638	}
		639
		640	#############################################################################
		641	# utilities
		642
545	# continue to parse $_ for headers and place them into the arg	643	# continue to parse $_ for headers and place them into the arg
546	sub parse_hdr() {	644	sub _parse_hdr() {
547	my %hdr;	645	my %hdr;
548		646
549	# things seen, not parsed:	647	# things seen, not parsed:
550	# p3pP="NON CUR OTPi OUR NOR UNI"	648	# p3pP="NON CUR OTPi OUR NOR UNI"
551		649
…		…
565	for values %hdr;	663	for values %hdr;
566		664
567	\%hdr	665	\%hdr
568	}	666	}
569		667
		668	#############################################################################
		669	# http_get
		670
570	our $qr_nlnl = qr{(?<![^\012])\015?\012};	671	our $qr_nlnl = qr{(?<![^\012])\015?\012};
571		672
572	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	673	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
573	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	674	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		675
		676	# maybe it should just become a normal object :/
		677
		678	sub _destroy_state(\%) {
		679	my ($state) = @_;
		680
		681	$state->{handle}->destroy if $state->{handle};
		682	%$state = ();
		683	}
		684
		685	sub _error(\%$$) {
		686	my ($state, $cb, $hdr) = @_;
		687
		688	&_destroy_state ($state);
		689
		690	$cb->(undef, $hdr);
		691	()
		692	}
		693
		694	our %IDEMPOTENT = (
		695	DELETE => 1,
		696	GET => 1,
		697	HEAD => 1,
		698	OPTIONS => 1,
		699	PUT => 1,
		700	TRACE => 1,
		701
		702	ACL => 1,
		703	"BASELINE-CONTROL" => 1,
		704	BIND => 1,
		705	CHECKIN => 1,
		706	CHECKOUT => 1,
		707	COPY => 1,
		708	LABEL => 1,
		709	LINK => 1,
		710	MERGE => 1,
		711	MKACTIVITY => 1,
		712	MKCALENDAR => 1,
		713	MKCOL => 1,
		714	MKREDIRECTREF => 1,
		715	MKWORKSPACE => 1,
		716	MOVE => 1,
		717	ORDERPATCH => 1,
		718	PROPFIND => 1,
		719	PROPPATCH => 1,
		720	REBIND => 1,
		721	REPORT => 1,
		722	SEARCH => 1,
		723	UNBIND => 1,
		724	UNCHECKOUT => 1,
		725	UNLINK => 1,
		726	UNLOCK => 1,
		727	UPDATE => 1,
		728	UPDATEREDIRECTREF => 1,
		729	"VERSION-CONTROL" => 1,
		730	);
574		731
575	sub http_request($$@) {	732	sub http_request($$@) {
576	my $cb = pop;	733	my $cb = pop;
577	my ($method, $url, %arg) = @_;	734	my ($method, $url, %arg) = @_;
578		735
…		…
596	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	753	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
597		754
598	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	755	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
599	if $recurse < 0;	756	if $recurse < 0;
600		757
601	my $proxy = $arg{proxy} \|\| $PROXY;	758	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
602	my $timeout = $arg{timeout} \|\| $TIMEOUT;	759	my $timeout = $arg{timeout} \|\| $TIMEOUT;
603		760
604	my ($uscheme, $uauthority, $upath, $query, $fragment) =	761	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
605	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;	762	$url =~ m\|^([^:]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
606		763
607	$uscheme = lc $uscheme;	764	$uscheme = lc $uscheme;
608		765
609	my $uport = $uscheme eq "http" ? 80	766	my $uport = $uscheme eq "http" ? 80
610	: $uscheme eq "https" ? 443	767	: $uscheme eq "https" ? 443
…		…
654	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	811	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
655		812
656	$hdr{"content-length"} = length $arg{body}	813	$hdr{"content-length"} = length $arg{body}
657	if length $arg{body} \|\| $method ne "GET";	814	if length $arg{body} \|\| $method ne "GET";
658		815
659	my $idempotent = $method =~ /^(?:GET\|HEAD\|PUT\|DELETE\|OPTIONS\|TRACE)$/;	816	my $idempotent = $IDEMPOTENT{$method};
660		817
661	# default value for keepalive is true iff the request is for an idempotent method	818	# default value for keepalive is true iff the request is for an idempotent method
662	my $keepalive = exists $arg{keepalive}	819	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
663	? $arg{keepalive}*1	820	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
664	: $idempotent ? $PERSISTENT_TIMEOUT : 0;	821	my $was_persistent; # true if this is actually a recycled connection
665		822
		823	# the key to use in the keepalive cache
		824	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		825
666	$hdr{connection} = ($keepalive ? "" : "close ") . "Te"; #1.1	826	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
667	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	827	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
668		828
669	my %state = (connect_guard => 1);	829	my %state = (connect_guard => 1);
670		830
671	my $ae_error = 595; # connecting	831	my $ae_error = 595; # connecting
672		832
673	# handle actual, non-tunneled, request	833	# handle actual, non-tunneled, request
674	my $handle_actual_request = sub {	834	my $handle_actual_request = sub {
675	$ae_error = 596; # request phase	835	$ae_error = 596; # request phase
676		836
		837	my $hdl = $state{handle};
		838
677	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};	839	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
678		840
679	# send request	841	# send request
680	$state{handle}->push_write (	842	$hdl->push_write (
681	"$method $rpath HTTP/1.1\015\012"	843	"$method $rpath HTTP/1.1\015\012"
682	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)	844	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
683	. "\015\012"	845	. "\015\012"
684	. (delete $arg{body})	846	. (delete $arg{body})
685	);	847	);
686		848
687	# return if error occured during push_write()	849	# return if error occurred during push_write()
688	return unless %state;	850	return unless %state;
689		851
690	# reduce memory usage, save a kitten, also re-use it for the response headers.	852	# reduce memory usage, save a kitten, also re-use it for the response headers.
691	%hdr = ();	853	%hdr = ();
692		854
693	# status line and headers	855	# status line and headers
694	$state{read_response} = sub {	856	$state{read_response} = sub {
		857	return unless %state;
		858
695	for ("$_[1]") {	859	for ("$_[1]") {
696	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	860	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
697		861
698	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci	862	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
699	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));	863	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
700		864
701	# 100 Continue handling	865	# 100 Continue handling
702	# should not happen as we don't send expect: 100-continue,	866	# should not happen as we don't send expect: 100-continue,
703	# but we handle it just in case.	867	# but we handle it just in case.
704	# since we send the request body regardless, if we get an error	868	# since we send the request body regardless, if we get an error
…		…
710	HTTPVersion => $1,	874	HTTPVersion => $1,
711	Status => $2,	875	Status => $2,
712	Reason => $3,	876	Reason => $3,
713	;	877	;
714		878
715	my $hdr = parse_hdr	879	my $hdr = _parse_hdr
716	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));	880	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
717		881
718	%hdr = (%$hdr, @pseudo);	882	%hdr = (%$hdr, @pseudo);
719	}	883	}
720		884
721	# redirect handling	885	# redirect handling
…		…
751	} elsif ($status == 307) {	915	} elsif ($status == 307) {
752	$redirect = 1;	916	$redirect = 1;
753	}	917	}
754	}	918	}
755		919
756	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])	920	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
757	my $may_keep_alive = $_[3];	921	if ($state{handle}) {
758		922	# handle keepalive
		923	if (
		924	$persistent
		925	&& $_[3]
		926	&& ($hdr{HTTPVersion} < 1.1
		927	? $hdr{connection} =~ /\bkeep-?alive\b/i
		928	: $hdr{connection} !~ /\bclose\b/i)
		929	) {
		930	ka_store $ka_key, delete $state{handle};
		931	} else {
		932	# no keepalive, destroy the handle
759	$state{handle}->destroy if $state{handle};	933	$state{handle}->destroy;
		934	}
		935	}
		936
760	%state = ();	937	%state = ();
761		938
762	if (defined $_[1]) {	939	if (defined $_[1]) {
763	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];	940	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
764	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];	941	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
…		…
771		948
772	if ($redirect && exists $hdr{location}) {	949	if ($redirect && exists $hdr{location}) {
773	# we ignore any errors, as it is very common to receive	950	# we ignore any errors, as it is very common to receive
774	# Content-Length != 0 but no actual body	951	# Content-Length != 0 but no actual body
775	# we also access %hdr, as $_[1] might be an erro	952	# we also access %hdr, as $_[1] might be an erro
		953	$state{recurse} =
776	http_request (	954	http_request (
777	$method => $hdr{location},	955	$method => $hdr{location},
778	%arg,	956	%arg,
779	recurse => $recurse - 1,	957	recurse => $recurse - 1,
780	Redirect => [$_[0], \%hdr],	958	Redirect => [$_[0], \%hdr],
		959	sub {
		960	%state = ();
		961	&$cb
		962	},
781	$cb);	963	);
782	} else {	964	} else {
783	$cb->($_[0], \%hdr);	965	$cb->($_[0], \%hdr);
784	}	966	}
785	};	967	};
786		968
787	$ae_error = 597; # body phase	969	$ae_error = 597; # body phase
788		970
		971	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		972
789	my $len = $hdr{"content-length"};	973	my $len = $chunked ? undef : $hdr{"content-length"};
790		974
791	# body handling, many different code paths	975	# body handling, many different code paths
792	# - no body expected	976	# - no body expected
793	# - want_body_handle	977	# - want_body_handle
794	# - te chunked	978	# - te chunked
…		…
809	$_[0]->on_error (undef);	993	$_[0]->on_error (undef);
810	$_[0]->on_read (undef);	994	$_[0]->on_read (undef);
811		995
812	$finish->(delete $state{handle});	996	$finish->(delete $state{handle});
813		997
814	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {	998	} elsif ($chunked) {
815	my $cl = 0;	999	my $cl = 0;
816	my $body = undef;	1000	my $body = "";
817	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };	1001	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
818		1002
819	$state{read_chunk} = sub {	1003	$state{read_chunk} = sub {
820	$_[1] =~ /^([0-9a-fA-F]+)/	1004	$_[1] =~ /^([0-9a-fA-F]+)/
821	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");	1005	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
822		1006
823	my $len = hex $1;	1007	my $len = hex $1;
824		1008
825	if ($len) {	1009	if ($len) {
826	$cl += $len;	1010	$cl += $len;
…		…
841	$_[0]->push_read (line => $qr_nlnl, sub {	1025	$_[0]->push_read (line => $qr_nlnl, sub {
842	if (length $_[1]) {	1026	if (length $_[1]) {
843	for ("$_[1]") {	1027	for ("$_[1]") {
844	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	1028	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
845		1029
846	my $hdr = parse_hdr	1030	my $hdr = _parse_hdr
847	or return $finish->(undef, $ae_error => "Garbled response trailers");	1031	or return $finish->(undef, $ae_error => "Garbled response trailers");
848		1032
849	%hdr = (%hdr, %$hdr);	1033	%hdr = (%hdr, %$hdr);
850	}	1034	}
851	}	1035	}
…		…
894	$_[0]->on_read (sub { });	1078	$_[0]->on_read (sub { });
895	}	1079	}
896	}	1080	}
897	};	1081	};
898		1082
		1083	# if keepalive is enabled, then the server closing the connection
		1084	# before a response can happen legally - we retry on idempotent methods.
		1085	if ($was_persistent && $idempotent) {
		1086	my $old_eof = $hdl->{on_eof};
		1087	$hdl->{on_eof} = sub {
		1088	_destroy_state %state;
		1089
		1090	%state = ();
		1091	$state{recurse} =
		1092	http_request (
		1093	$method => $url,
		1094	%arg,
		1095	recurse => $recurse - 1,
		1096	keepalive => 0,
		1097	sub {
		1098	%state = ();
		1099	&$cb
		1100	}
		1101	);
		1102	};
		1103	$hdl->on_read (sub {
		1104	return unless %state;
		1105
		1106	# as soon as we receive something, a connection close
		1107	# once more becomes a hard error
		1108	$hdl->{on_eof} = $old_eof;
		1109	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1110	});
		1111	} else {
899	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});	1112	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1113	}
900	};	1114	};
901		1115
		1116	my $prepare_handle = sub {
		1117	my ($hdl) = $state{handle};
		1118
		1119	$hdl->on_error (sub {
		1120	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1121	});
		1122	$hdl->on_eof (sub {
		1123	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1124	});
		1125	$hdl->timeout_reset;
		1126	$hdl->timeout ($timeout);
		1127	};
		1128
		1129	# connected to proxy (or origin server)
902	my $connect_cb = sub {	1130	my $connect_cb = sub {
903	$state{fh} = shift	1131	my $fh = shift
904	or do {
905	my $err = "$!";
906	%state = ();
907	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });	1132	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
908	};
909		1133
910	return unless delete $state{connect_guard};	1134	return unless delete $state{connect_guard};
911		1135
912	# get handle	1136	# get handle
913	$state{handle} = new AnyEvent::Handle	1137	$state{handle} = new AnyEvent::Handle
		1138	%{ $arg{handle_params} },
914	fh => $state{fh},	1139	fh => $fh,
915	peername => $rhost,	1140	peername => $uhost,
916	tls_ctx => $arg{tls_ctx},	1141	tls_ctx => $arg{tls_ctx},
917	# these need to be reconfigured on keepalive handles
918	timeout => $timeout,
919	on_error => sub {
920	%state = ();
921	$cb->(undef, { @pseudo, Status => $ae_error, Reason => $_[2] });
922	},
923	on_eof => sub {
924	%state = ();
925	$cb->(undef, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" });
926	},
927	;	1142	;
928		1143
929	# limit the number of persistent connections	1144	$prepare_handle->();
930	# keepalive not yet supported
931	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
932	# ++$KA_COUNT{$_[1]};
933	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
934	# --$KA_COUNT{$_[1]}
935	# };
936	# $hdr{connection} = "keep-alive";
937	# }
938		1145
939	$state{handle}->starttls ("connect") if $rscheme eq "https";	1146	#$state{handle}->starttls ("connect") if $rscheme eq "https";
940		1147
941	# now handle proxy-CONNECT method	1148	# now handle proxy-CONNECT method
942	if ($proxy && $uscheme eq "https") {	1149	if ($proxy && $uscheme eq "https") {
943	# oh dear, we have to wrap it into a connect request	1150	# oh dear, we have to wrap it into a connect request
944		1151
945	# maybe re-use $uauthority with patched port?	1152	# maybe re-use $uauthority with patched port?
946	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");	1153	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");
947	$state{handle}->push_read (line => $qr_nlnl, sub {	1154	$state{handle}->push_read (line => $qr_nlnl, sub {
948	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix	1155	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
949	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));	1156	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
950		1157
951	if ($2 == 200) {	1158	if ($2 == 200) {
952	$rpath = $upath;	1159	$rpath = $upath;
953	$handle_actual_request->();	1160	$handle_actual_request->();
954	} else {	1161	} else {
955	%state = ();
956	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });	1162	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
957	}	1163	}
958	});	1164	});
959	} else {	1165	} else {
960	$handle_actual_request->();	1166	$handle_actual_request->();
961	}	1167	}
…		…
964	_get_slot $uhost, sub {	1170	_get_slot $uhost, sub {
965	$state{slot_guard} = shift;	1171	$state{slot_guard} = shift;
966		1172
967	return unless $state{connect_guard};	1173	return unless $state{connect_guard};
968		1174
		1175	# try to use an existing keepalive connection, but only if we, ourselves, plan
		1176	# on a keepalive request (in theory, this should be a separate config option).
		1177	if ($persistent && $KA_CACHE{$ka_key}) {
		1178	$was_persistent = 1;
		1179
		1180	$state{handle} = ka_fetch $ka_key;
		1181	$state{handle}->destroyed
		1182	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
		1183	$prepare_handle->();
		1184	$state{handle}->destroyed
		1185	and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
		1186	$handle_actual_request->();
		1187
		1188	} else {
969	my $tcp_connect = $arg{tcp_connect}	1189	my $tcp_connect = $arg{tcp_connect}
970	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1190	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
971		1191
972	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });	1192	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		1193	}
973	};	1194	};
974		1195
975	defined wantarray && AnyEvent::Util::guard { %state = () }	1196	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
976	}	1197	}
977		1198
978	sub http_get($@) {	1199	sub http_get($@) {
979	unshift @_, "GET";	1200	unshift @_, "GET";
980	&http_request	1201	&http_request
…		…
998	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1219	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
999	the actual connection, which in turn uses AnyEvent::DNS to resolve	1220	the actual connection, which in turn uses AnyEvent::DNS to resolve
1000	hostnames. The latter is a simple stub resolver and does no caching	1221	hostnames. The latter is a simple stub resolver and does no caching
1001	on its own. If you want DNS caching, you currently have to provide	1222	on its own. If you want DNS caching, you currently have to provide
1002	your own default resolver (by storing a suitable resolver object in	1223	your own default resolver (by storing a suitable resolver object in
1003	C<$AnyEvent::DNS::RESOLVER>).	1224	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
1004		1225
1005	=head2 GLOBAL FUNCTIONS AND VARIABLES	1226	=head2 GLOBAL FUNCTIONS AND VARIABLES
1006		1227
1007	=over 4	1228	=over 4
1008		1229
1009	=item AnyEvent::HTTP::set_proxy "proxy-url"	1230	=item AnyEvent::HTTP::set_proxy "proxy-url"
1010		1231
1011	Sets the default proxy server to use. The proxy-url must begin with a	1232	Sets the default proxy server to use. The proxy-url must begin with a
1012	string of the form C<http://host:port> (optionally C<https:...>), croaks	1233	string of the form C<http://host:port>, croaks otherwise.
1013	otherwise.
1014		1234
1015	To clear an already-set proxy, use C<undef>.	1235	To clear an already-set proxy, use C<undef>.
		1236
		1237	When AnyEvent::HTTP is loaded for the first time it will query the
		1238	default proxy from the operating system, currently by looking at
		1239	C<$ENV{http_proxy>}.
1016		1240
1017	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]	1241	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
1018		1242
1019	Remove all cookies from the cookie jar that have been expired. If	1243	Remove all cookies from the cookie jar that have been expired. If
1020	C<$session_end> is given and true, then additionally remove all session	1244	C<$session_end> is given and true, then additionally remove all session
1021	cookies.	1245	cookies.
1022		1246
1023	You should call this function (with a true C<$session_end>) before you	1247	You should call this function (with a true C<$session_end>) before you
1024	save cookies to disk, and you should call this function after loading them	1248	save cookies to disk, and you should call this function after loading them
1025	again. If you have a long-running program you can additonally call this	1249	again. If you have a long-running program you can additionally call this
1026	function from time to time.	1250	function from time to time.
1027		1251
1028	A cookie jar is initially an empty hash-reference that is managed by this	1252	A cookie jar is initially an empty hash-reference that is managed by this
1029	module. It's format is subject to change, but currently it is like this:	1253	module. It's format is subject to change, but currently it is like this:
1030		1254
1031	The key C<version> has to contain C<1>, otherwise the hash gets	1255	The key C<version> has to contain C<1>, otherwise the hash gets
1032	emptied. All other keys are hostnames or IP addresses pointing to	1256	emptied. All other keys are hostnames or IP addresses pointing to
1033	hash-references. The key for these inner hash references is the	1257	hash-references. The key for these inner hash references is the
1034	server path for which this cookie is meant, and the values are again	1258	server path for which this cookie is meant, and the values are again
1035	hash-references. The keys of those hash-references is the cookie name, and	1259	hash-references. Each key of those hash-references is a cookie name, and
1036	the value, you guessed it, is another hash-reference, this time with the	1260	the value, you guessed it, is another hash-reference, this time with the
1037	key-value pairs from the cookie, except for C<expires> and C<max-age>,	1261	key-value pairs from the cookie, except for C<expires> and C<max-age>,
1038	which have been replaced by a C<_expires> key that contains the cookie	1262	which have been replaced by a C<_expires> key that contains the cookie
1039	expiry timestamp.	1263	expiry timestamp. Session cookies are indicated by not having an
		1264	C<_expires> key.
1040		1265
1041	Here is an example of a cookie jar with a single cookie, so you have a	1266	Here is an example of a cookie jar with a single cookie, so you have a
1042	chance of understanding the above paragraph:	1267	chance of understanding the above paragraph:
1043		1268
1044	{	1269	{
…		…
1066		1291
1067	=item $AnyEvent::HTTP::MAX_RECURSE	1292	=item $AnyEvent::HTTP::MAX_RECURSE
1068		1293
1069	The default value for the C<recurse> request parameter (default: C<10>).	1294	The default value for the C<recurse> request parameter (default: C<10>).
1070		1295
		1296	=item $AnyEvent::HTTP::TIMEOUT
		1297
		1298	The default timeout for connection operations (default: C<300>).
		1299
1071	=item $AnyEvent::HTTP::USERAGENT	1300	=item $AnyEvent::HTTP::USERAGENT
1072		1301
1073	The default value for the C<User-Agent> header (the default is	1302	The default value for the C<User-Agent> header (the default is
1074	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1303	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
1075		1304
1076	=item $AnyEvent::HTTP::MAX_PER_HOST	1305	=item $AnyEvent::HTTP::MAX_PER_HOST
1077		1306
1078	The maximum number of concurrent connections to the same host (identified	1307	The maximum number of concurrent connections to the same host (identified
1079	by the hostname). If the limit is exceeded, then the additional requests	1308	by the hostname). If the limit is exceeded, then the additional requests
1080	are queued until previous connections are closed.	1309	are queued until previous connections are closed. Both persistent and
		1310	non-persistent connections are counted in this limit.
1081		1311
1082	The default value for this is C<4>, and it is highly advisable to not	1312	The default value for this is C<4>, and it is highly advisable to not
1083	increase it.	1313	increase it much.
		1314
		1315	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1316	connections, older browsers used 2, newer ones (such as firefox 3)
		1317	typically use 6, and Opera uses 8 because like, they have the fastest
		1318	browser and give a shit for everybody else on the planet.
		1319
		1320	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1321
		1322	The time after which idle persistent connections get closed by
		1323	AnyEvent::HTTP (default: C<3>).
1084		1324
1085	=item $AnyEvent::HTTP::ACTIVE	1325	=item $AnyEvent::HTTP::ACTIVE
1086		1326
1087	The number of active connections. This is not the number of currently	1327	The number of active connections. This is not the number of currently
1088	running requests, but the number of currently open and non-idle TCP	1328	running requests, but the number of currently open and non-idle TCP
1089	connections. This number of can be useful for load-leveling.	1329	connections. This number can be useful for load-leveling.
1090		1330
1091	=back	1331	=back
1092		1332
1093	=cut	1333	=cut
1094		1334
…		…
1128	# other formats fail in the loop below	1368	# other formats fail in the loop below
1129		1369
1130	for (0..11) {	1370	for (0..11) {
1131	if ($m eq $month[$_]) {	1371	if ($m eq $month[$_]) {
1132	require Time::Local;	1372	require Time::Local;
1133	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1373	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
1134	}	1374	}
1135	}	1375	}
1136		1376
1137	undef	1377	undef
1138	}	1378	}
1139		1379
1140	sub set_proxy($) {	1380	sub set_proxy($) {
1141	if (length $_[0]) {	1381	if (length $_[0]) {
1142	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1382	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1143	or Carp::croak "$_[0]: invalid proxy URL";	1383	or Carp::croak "$_[0]: invalid proxy URL";
1144	$PROXY = [$2, $3 \|\| 3128, $1]	1384	$PROXY = [$2, $3 \|\| 3128, $1]
1145	} else {	1385	} else {
1146	undef $PROXY;	1386	undef $PROXY;
1147	}	1387	}
…		…
1150	# initialise proxy from environment	1390	# initialise proxy from environment
1151	eval {	1391	eval {
1152	set_proxy $ENV{http_proxy};	1392	set_proxy $ENV{http_proxy};
1153	};	1393	};
1154		1394
		1395	=head2 SHOWCASE
		1396
		1397	This section contains some more elaborate "real-world" examples or code
		1398	snippets.
		1399
		1400	=head2 HTTP/1.1 FILE DOWNLOAD
		1401
		1402	Downloading files with HTTP can be quite tricky, especially when something
		1403	goes wrong and you want to resume.
		1404
		1405	Here is a function that initiates and resumes a download. It uses the
		1406	last modified time to check for file content changes, and works with many
		1407	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1408	on older servers.
		1409
		1410	It calls the completion callback with either C<undef>, which means a
		1411	nonretryable error occurred, C<0> when the download was partial and should
		1412	be retried, and C<1> if it was successful.
		1413
		1414	use AnyEvent::HTTP;
		1415
		1416	sub download($$$) {
		1417	my ($url, $file, $cb) = @_;
		1418
		1419	open my $fh, "+<", $file
		1420	or die "$file: $!";
		1421
		1422	my %hdr;
		1423	my $ofs = 0;
		1424
		1425	warn stat $fh;
		1426	warn -s _;
		1427	if (stat $fh and -s _) {
		1428	$ofs = -s _;
		1429	warn "-s is ", $ofs;
		1430	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1431	$hdr{"range"} = "bytes=$ofs-";
		1432	}
		1433
		1434	http_get $url,
		1435	headers => \%hdr,
		1436	on_header => sub {
		1437	my ($hdr) = @_;
		1438
		1439	if ($hdr->{Status} == 200 && $ofs) {
		1440	# resume failed
		1441	truncate $fh, $ofs = 0;
		1442	}
		1443
		1444	sysseek $fh, $ofs, 0;
		1445
		1446	1
		1447	},
		1448	on_body => sub {
		1449	my ($data, $hdr) = @_;
		1450
		1451	if ($hdr->{Status} =~ /^2/) {
		1452	length $data == syswrite $fh, $data
		1453	or return; # abort on write errors
		1454	}
		1455
		1456	1
		1457	},
		1458	sub {
		1459	my (undef, $hdr) = @_;
		1460
		1461	my $status = $hdr->{Status};
		1462
		1463	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1464	utime $fh, $time, $time;
		1465	}
		1466
		1467	if ($status == 200 \|\| $status == 206 \|\| $status == 416) {
		1468	# download ok \|\| resume ok \|\| file already fully downloaded
		1469	$cb->(1, $hdr);
		1470
		1471	} elsif ($status == 412) {
		1472	# file has changed while resuming, delete and retry
		1473	unlink $file;
		1474	$cb->(0, $hdr);
		1475
		1476	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1477	# retry later
		1478	$cb->(0, $hdr);
		1479
		1480	} else {
		1481	$cb->(undef, $hdr);
		1482	}
		1483	}
		1484	;
		1485	}
		1486
		1487	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1488	if ($_[0]) {
		1489	print "OK!\n";
		1490	} elsif (defined $_[0]) {
		1491	print "please retry later\n";
		1492	} else {
		1493	print "ERROR\n";
		1494	}
		1495	};
		1496
1155	=head2 SOCKS PROXIES	1497	=head3 SOCKS PROXIES
1156		1498
1157	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1499	Socks proxies are not directly supported by AnyEvent::HTTP. You can
1158	compile your perl to support socks, or use an external program such as	1500	compile your perl to support socks, or use an external program such as
1159	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy	1501	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
1160	transparently.	1502	transparently.

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.90 by root, Mon Jan 3 00:41:25 2011 UTC vs. Revision 1.118 by root, Mon Nov 18 01:01:02 2013 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.90 by root, Mon Jan 3 00:41:25 2011 UTC vs.
Revision 1.118 by root, Mon Nov 18 01:01:02 2013 UTC