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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.85 by root, Sun Jan 2 05:31:56 2011 UTC vs.
Revision 1.99 by root, Fri Jan 28 01:17:25 2011 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 = '2.03';
52		52
53	our @EXPORT = qw(http_get http_post http_head http_request);	53	our @EXPORT = qw(http_get http_post http_head http_request);
54		54
55	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	55	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
56	our $MAX_RECURSE = 10;	56	our $MAX_RECURSE = 10;
57	our $MAX_PERSISTENT = 8;
58	our $PERSISTENT_TIMEOUT = 2;	57	our $PERSISTENT_TIMEOUT = 3;
59	our $TIMEOUT = 300;	58	our $TIMEOUT = 300;
60		59	our $MAX_PER_HOST = 4; # changing this is evil
61	# changing these is evil
62	our $MAX_PERSISTENT_PER_HOST = 0;
63	our $MAX_PER_HOST = 4;
64		60
65	our $PROXY;	61	our $PROXY;
66	our $ACTIVE = 0;	62	our $ACTIVE = 0;
67		63
68	my %KA_COUNT; # number of open keep-alive connections per host	64	my %KA_CACHE; # indexed by uhost currently, points to [$handle...] array
69	my %CO_SLOT; # number of open connections, and wait queue, per host	65	my %CO_SLOT; # number of open connections, and wait queue, per host
70		66
71	=item http_get $url, key => value..., $cb->($data, $headers)	67	=item http_get $url, key => value..., $cb->($data, $headers)
72		68
73	Executes an HTTP-GET request. See the http_request function for details on	69	Executes an HTTP-GET request. See the http_request function for details on
…		…
169	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and	165	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
170	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>	166	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>
171	(this can be suppressed by using C<undef> for these headers in which case	167	(this can be suppressed by using C<undef> for these headers in which case
172	they won't be sent at all).	168	they won't be sent at all).
173		169
		170	You really should provide your own C<User-Agent:> header value that is
		171	appropriate for your program - I wouldn't be surprised if the default
		172	AnyEvent string gets blocked by webservers sooner or later.
		173
174	=item timeout => $seconds	174	=item timeout => $seconds
175		175
176	The time-out to use for various stages - each connect attempt will reset	176	The time-out to use for various stages - each connect attempt will reset
177	the timeout, as will read or write activity, i.e. this is not an overall	177	the timeout, as will read or write activity, i.e. this is not an overall
178	timeout.	178	timeout.
…		…
182	=item proxy => [$host, $port[, $scheme]] or undef	182	=item proxy => [$host, $port[, $scheme]] or undef
183		183
184	Use the given http proxy for all requests. If not specified, then the	184	Use the given http proxy for all requests. If not specified, then the
185	default proxy (as specified by C<$ENV{http_proxy}>) is used.	185	default proxy (as specified by C<$ENV{http_proxy}>) is used.
186		186
187	C<$scheme> must be either missing, C<http> for HTTP or C<https> for	187	C<$scheme> must be either missing or must be C<http> for HTTP.
188	HTTPS.
189		188
190	=item body => $string	189	=item body => $string
191		190
192	The request body, usually empty. Will be sent as-is (future versions of	191	The request body, usually empty. Will be sent as-is (future versions of
193	this module might offer more options).	192	this module might offer more options).
…		…
223	verification, highest compatibility) and high-security (CA and common-name	222	verification, highest compatibility) and high-security (CA and common-name
224	verification) TLS context.	223	verification) TLS context.
225		224
226	The default for this option is C<low>, which could be interpreted as "give	225	The default for this option is C<low>, which could be interpreted as "give
227	me the page, no matter what".	226	me the page, no matter what".
		227
		228	See also the C<sessionid> parameter.
		229
		230	=item session => $string
		231
		232	The module might reuse connections to the same host internally. Sometimes
		233	(e.g. when using TLS), you do not want to reuse connections from other
		234	sessions. This can be achieved by setting this parameter to some unique
		235	ID (such as the address of an object storing your state data, or the TLS
		236	context) - only connections using the same unique ID will be reused.
228		237
229	=item on_prepare => $callback->($fh)	238	=item on_prepare => $callback->($fh)
230		239
231	In rare cases you need to "tune" the socket before it is used to	240	In rare cases you need to "tune" the socket before it is used to
232	connect (for exmaple, to bind it on a given IP address). This parameter	241	connect (for exmaple, to bind it on a given IP address). This parameter
…		…
302	called. Instead of the C<$body> argument containing the body data, the	311	called. Instead of the C<$body> argument containing the body data, the
303	callback will receive the L<AnyEvent::Handle> object associated with the	312	callback will receive the L<AnyEvent::Handle> object associated with the
304	connection. In error cases, C<undef> will be passed. When there is no body	313	connection. In error cases, C<undef> will be passed. When there is no body
305	(e.g. status C<304>), the empty string will be passed.	314	(e.g. status C<304>), the empty string will be passed.
306		315
307	The handle object might or might not be in TLS mode, might be connected to	316	The handle object might or might not be in TLS mode, might be connected
308	a proxy, be a persistent connection etc., and configured in unspecified	317	to a proxy, be a persistent connection, use chunked transfer encoding
309	ways. The user is responsible for this handle (it will not be used by this	318	etc., and configured in unspecified ways. The user is responsible for this
310	module anymore).	319	handle (it will not be used by this module anymore).
311		320
312	This is useful with some push-type services, where, after the initial	321	This is useful with some push-type services, where, after the initial
313	headers, an interactive protocol is used (typical example would be the	322	headers, an interactive protocol is used (typical example would be the
314	push-style twitter API which starts a JSON/XML stream).	323	push-style twitter API which starts a JSON/XML stream).
315		324
316	If you think you need this, first have a look at C<on_body>, to see if	325	If you think you need this, first have a look at C<on_body>, to see if
317	that doesn't solve your problem in a better way.	326	that doesn't solve your problem in a better way.
		327
		328	=item persistent => $boolean
		329
		330	Try to create/reuse a persistent connection. When this flag is set
		331	(default: true for idempotent requests, false for all others), then
		332	C<http_request> tries to re-use an existing (previously-created)
		333	persistent connection to the host and, failing that, tries to create a new
		334	one.
		335
		336	Requests failing in certain ways will be automatically retried once, which
		337	is dangerous for non-idempotent requests, which is why it defaults to off
		338	for them. The reason for this is because the bozos who designed HTTP/1.1
		339	made it impossible to distinguish between a fatal error and a normal
		340	connection timeout, so you never know whether there was a problem with
		341	your request or not.
		342
		343	When reusing an existent connection, many parameters (such as TLS context)
		344	will be ignored. See the C<session> parameter for a workaround.
		345
		346	=item keepalive => $boolean
		347
		348	Only used when C<persistent> is also true. This parameter decides whether
		349	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		350	(as opposed to only a HTTP/1.1 persistent connection).
		351
		352	The default is true, except when using a proxy, in which case it defaults
		353	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		354
		355	=item handle_params => { key => value ... }
		356
		357	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		358	constructor that is called - not all requests will create a handle, and
		359	sometimes more than one is created, so this parameter is only good for
		360	setting hints.
		361
		362	Example: set the maximum read size to 4096, to potentially conserve memory
		363	at the cost of speed.
		364
		365	handle_params => {
		366	max_read_size => 4096,
		367	},
318		368
319	=back	369	=back
320		370
321	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	371	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
322	the response body.	372	the response body.
…		…
329	Example: do a HTTP HEAD request on https://www.google.com/, use a	379	Example: do a HTTP HEAD request on https://www.google.com/, use a
330	timeout of 30 seconds.	380	timeout of 30 seconds.
331		381
332	http_request	382	http_request
333	GET => "https://www.google.com",	383	GET => "https://www.google.com",
		384	headers => { "user-agent" => "MySearchClient 1.0" },
334	timeout => 30,	385	timeout => 30,
335	sub {	386	sub {
336	my ($body, $hdr) = @_;	387	my ($body, $hdr) = @_;
337	use Data::Dumper;	388	use Data::Dumper;
338	print Dumper $hdr;	389	print Dumper $hdr;
…		…
348	};	399	};
349		400
350	undef $request;	401	undef $request;
351		402
352	=cut	403	=cut
		404
		405	#############################################################################
		406	# wait queue/slots
353		407
354	sub _slot_schedule;	408	sub _slot_schedule;
355	sub _slot_schedule($) {	409	sub _slot_schedule($) {
356	my $host = shift;	410	my $host = shift;
357		411
…		…
380		434
381	_slot_schedule $_[0];	435	_slot_schedule $_[0];
382	}	436	}
383		437
384	#############################################################################	438	#############################################################################
		439	# cookie handling
385		440
386	# expire cookies	441	# expire cookies
387	sub cookie_jar_expire($;$) {	442	sub cookie_jar_expire($;$) {
388	my ($jar, $session_end) = @_;	443	my ($jar, $session_end) = @_;
389		444
…		…
413	}	468	}
414	}	469	}
415		470
416	# extract cookies from jar	471	# extract cookies from jar
417	sub cookie_jar_extract($$$$) {	472	sub cookie_jar_extract($$$$) {
418	my ($jar, $uscheme, $uhost, $upath) = @_;	473	my ($jar, $scheme, $host, $path) = @_;
419
420	$uhost = lc $uhost;
421		474
422	%$jar = () if $jar->{version} != 1;	475	%$jar = () if $jar->{version} != 1;
423		476
424	my @cookies;	477	my @cookies;
425		478
426	while (my ($chost, $paths) = each %$jar) {	479	while (my ($chost, $paths) = each %$jar) {
427	next unless ref $paths;	480	next unless ref $paths;
428		481
429	if ($chost =~ /^\./) {	482	if ($chost =~ /^\./) {
430	next unless $chost eq substr $uhost, -length $chost;	483	next unless $chost eq substr $host, -length $chost;
431	} elsif ($chost =~ /\./) {	484	} elsif ($chost =~ /\./) {
432	next unless $chost eq $uhost;	485	next unless $chost eq $host;
433	} else {	486	} else {
434	next;	487	next;
435	}	488	}
436		489
437	while (my ($cpath, $cookies) = each %$paths) {	490	while (my ($cpath, $cookies) = each %$paths) {
438	next unless $cpath eq substr $upath, 0, length $cpath;	491	next unless $cpath eq substr $path, 0, length $cpath;
439		492
440	while (my ($cookie, $kv) = each %$cookies) {	493	while (my ($cookie, $kv) = each %$cookies) {
441	next if $uscheme ne "https" && exists $kv->{secure};	494	next if $scheme ne "https" && exists $kv->{secure};
442		495
443	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {	496	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
444	delete $cookies->{$cookie};	497	delete $cookies->{$cookie};
445	next;	498	next;
446	}	499	}
…		…
460	\@cookies	513	\@cookies
461	}	514	}
462		515
463	# parse set_cookie header into jar	516	# parse set_cookie header into jar
464	sub cookie_jar_set_cookie($$$$) {	517	sub cookie_jar_set_cookie($$$$) {
465	my ($jar, $set_cookie, $uhost, $date) = @_;	518	my ($jar, $set_cookie, $host, $date) = @_;
466		519
467	my $anow = int AE::now;	520	my $anow = int AE::now;
468	my $snow; # server-now	521	my $snow; # server-now
469		522
470	for ($set_cookie) {	523	for ($set_cookie) {
…		…
493	# quoted	546	# quoted
494	$value = $3;	547	$value = $3;
495	$value =~ s/\\(.)/$1/gs;	548	$value =~ s/\\(.)/$1/gs;
496	}	549	}
497		550
498	push @kv, lc $name, $value;	551	push @kv, @kv ? lc $name : $name, $value;
499		552
500	last unless /\G\s*;/gc;	553	last unless /\G\s*;/gc;
501	}	554	}
502		555
503	last unless @kv;	556	last unless @kv;
…		…
526		579
527	# this is not rfc-like and not netscape-like. go figure.	580	# this is not rfc-like and not netscape-like. go figure.
528	my $ndots = $cdom =~ y/.//;	581	my $ndots = $cdom =~ y/.//;
529	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	582	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
530	} else {	583	} else {
531	$cdom = $uhost;	584	$cdom = $host;
532	}	585	}
533		586
534	# store it	587	# store it
535	$jar->{version} = 1;	588	$jar->{version} = 1;
536	$jar->{lc $cdom}{$cpath}{$name} = \%kv;	589	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
537		590
538	redo if /\G\s*,/gc;	591	redo if /\G\s*,/gc;
539	}	592	}
540	}	593	}
541		594
		595	#############################################################################
		596	# keepalive/persistent connection cache
		597
		598	# fetch a connection from the keepalive cache
		599	sub ka_fetch($) {
		600	my $ka_key = shift;
		601
		602	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		603	delete $KA_CACHE{$ka_key}
		604	unless @{ $KA_CACHE{$ka_key} };
		605
		606	$hdl
		607	}
		608
		609	sub ka_store($$) {
		610	my ($ka_key, $hdl) = @_;
		611
		612	my $kaa = $KA_CACHE{$ka_key} \|\|= [];
		613
		614	my $destroy = sub {
		615	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		616
		617	$hdl->destroy;
		618
		619	@ka
		620	? $KA_CACHE{$ka_key} = \@ka
		621	: delete $KA_CACHE{$ka_key};
		622	};
		623
		624	# on error etc., destroy
		625	$hdl->on_error ($destroy);
		626	$hdl->on_eof ($destroy);
		627	$hdl->on_read ($destroy);
		628	$hdl->timeout ($PERSISTENT_TIMEOUT);
		629
		630	push @$kaa, $hdl;
		631	shift @$kaa while @$kaa > $MAX_PER_HOST;
		632	}
		633
		634	#############################################################################
		635	# utilities
		636
542	# continue to parse $_ for headers and place them into the arg	637	# continue to parse $_ for headers and place them into the arg
543	sub parse_hdr() {	638	sub _parse_hdr() {
544	my %hdr;	639	my %hdr;
545		640
546	# things seen, not parsed:	641	# things seen, not parsed:
547	# p3pP="NON CUR OTPi OUR NOR UNI"	642	# p3pP="NON CUR OTPi OUR NOR UNI"
548		643
…		…
562	for values %hdr;	657	for values %hdr;
563		658
564	\%hdr	659	\%hdr
565	}	660	}
566		661
		662	#############################################################################
		663	# http_get
		664
567	our $qr_nlnl = qr{(?<![^\012])\015?\012};	665	our $qr_nlnl = qr{(?<![^\012])\015?\012};
568		666
569	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	667	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
570	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	668	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		669
		670	# maybe it should just become a normal object :/
		671
		672	sub _destroy_state(\%) {
		673	my ($state) = @_;
		674
		675	$state->{handle}->destroy if $state->{handle};
		676	%$state = ();
		677	}
		678
		679	sub _error(\%$$) {
		680	my ($state, $cb, $hdr) = @_;
		681
		682	&_destroy_state ($state);
		683
		684	$cb->(undef, $hdr);
		685	()
		686	}
571		687
572	sub http_request($$@) {	688	sub http_request($$@) {
573	my $cb = pop;	689	my $cb = pop;
574	my ($method, $url, %arg) = @_;	690	my ($method, $url, %arg) = @_;
575		691
…		…
596	if $recurse < 0;	712	if $recurse < 0;
597		713
598	my $proxy = $arg{proxy} \|\| $PROXY;	714	my $proxy = $arg{proxy} \|\| $PROXY;
599	my $timeout = $arg{timeout} \|\| $TIMEOUT;	715	my $timeout = $arg{timeout} \|\| $TIMEOUT;
600		716
601	my ($uscheme, $uauthority, $upath, $query, $fragment) =	717	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
602	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;	718	$url =~ m\|^([^:/?#]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
603		719
604	$uscheme = lc $uscheme;	720	$uscheme = lc $uscheme;
605		721
606	my $uport = $uscheme eq "http" ? 80	722	my $uport = $uscheme eq "http" ? 80
607	: $uscheme eq "https" ? 443	723	: $uscheme eq "https" ? 443
608	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });	724	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
609		725
610	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	726	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
611	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	727	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
612		728
613	my $uhost = $1;	729	my $uhost = lc $1;
614	$uport = $2 if defined $2;	730	$uport = $2 if defined $2;
615		731
616	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	732	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
617	unless exists $hdr{host};	733	unless exists $hdr{host};
618		734
…		…
637	$rscheme = "http" unless defined $rscheme;	753	$rscheme = "http" unless defined $rscheme;
638		754
639	# don't support https requests over https-proxy transport,	755	# don't support https requests over https-proxy transport,
640	# can't be done with tls as spec'ed, unless you double-encrypt.	756	# can't be done with tls as spec'ed, unless you double-encrypt.
641	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	757	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		758
		759	$rhost = lc $rhost;
		760	$rscheme = lc $rscheme;
642	} else {	761	} else {
643	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	762	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
644	}	763	}
645		764
646	# leave out fragment and query string, just a heuristic	765	# leave out fragment and query string, just a heuristic
…		…
648	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	767	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
649		768
650	$hdr{"content-length"} = length $arg{body}	769	$hdr{"content-length"} = length $arg{body}
651	if length $arg{body} \|\| $method ne "GET";	770	if length $arg{body} \|\| $method ne "GET";
652		771
653	$hdr{connection} = "close TE"; #1.1	772	my $idempotent = $method =~ /^(?:GET\|HEAD\|PUT\|DELETE\|OPTIONS\|TRACE)$/;
		773
		774	# default value for keepalive is true iff the request is for an idempotent method
		775	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : $idempotent;
		776	my $keepalive10 = exists $arg{keepalive10} ? $arg{keepalive10} : !$proxy;
		777	my $keptalive; # true if this is actually a recycled connection
		778
		779	# the key to use in the keepalive cache
		780	my $ka_key = "$uhost\x00$arg{sessionid}";
		781
		782	$hdr{connection} = ($keepalive ? $keepalive10 ? "keep-alive " : "" : "close ") . "Te"; #1.1
654	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	783	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
655		784
656	my %state = (connect_guard => 1);	785	my %state = (connect_guard => 1);
		786
		787	my $ae_error = 595; # connecting
		788
		789	# handle actual, non-tunneled, request
		790	my $handle_actual_request = sub {
		791	$ae_error = 596; # request phase
		792
		793	my $hdl = $state{handle};
		794
		795	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
		796
		797	# send request
		798	$hdl->push_write (
		799	"$method $rpath HTTP/1.1\015\012"
		800	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		801	. "\015\012"
		802	. (delete $arg{body})
		803	);
		804
		805	# return if error occured during push_write()
		806	return unless %state;
		807
		808	# reduce memory usage, save a kitten, also re-use it for the response headers.
		809	%hdr = ();
		810
		811	# status line and headers
		812	$state{read_response} = sub {
		813	return unless %state;
		814
		815	for ("$_[1]") {
		816	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		817
		818	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
		819	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
		820
		821	# 100 Continue handling
		822	# should not happen as we don't send expect: 100-continue,
		823	# but we handle it just in case.
		824	# since we send the request body regardless, if we get an error
		825	# we are out of-sync, which we currently do NOT handle correctly.
		826	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		827	if $2 eq 100;
		828
		829	push @pseudo,
		830	HTTPVersion => $1,
		831	Status => $2,
		832	Reason => $3,
		833	;
		834
		835	my $hdr = _parse_hdr
		836	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
		837
		838	%hdr = (%$hdr, @pseudo);
		839	}
		840
		841	# redirect handling
		842	# microsoft and other shitheads don't give a shit for following standards,
		843	# try to support some common forms of broken Location headers.
		844	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		845	$hdr{location} =~ s/^\.\/+//;
		846
		847	my $url = "$rscheme://$uhost:$uport";
		848
		849	unless ($hdr{location} =~ s/^\///) {
		850	$url .= $upath;
		851	$url =~ s/\/[^\/]*$//;
		852	}
		853
		854	$hdr{location} = "$url/$hdr{location}";
		855	}
		856
		857	my $redirect;
		858
		859	if ($recurse) {
		860	my $status = $hdr{Status};
		861
		862	# industry standard is to redirect POST as GET for
		863	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		864	# also, the UA should ask the user for 301 and 307 and POST,
		865	# industry standard seems to be to simply follow.
		866	# we go with the industry standard.
		867	if ($status == 301 or $status == 302 or $status == 303) {
		868	# HTTP/1.1 is unclear on how to mutate the method
		869	$method = "GET" unless $method eq "HEAD";
		870	$redirect = 1;
		871	} elsif ($status == 307) {
		872	$redirect = 1;
		873	}
		874	}
		875
		876	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
		877	if ($state{handle}) {
		878	# handle keepalive
		879	if (
		880	$keepalive
		881	&& $_[3]
		882	&& ($hdr{HTTPVersion} < 1.1
		883	? $hdr{connection} =~ /\bkeep-?alive\b/i
		884	: $hdr{connection} !~ /\bclose\b/i)
		885	) {
		886	ka_store $ka_key, delete $state{handle};
		887	} else {
		888	# no keepalive, destroy the handle
		889	$state{handle}->destroy;
		890	}
		891	}
		892
		893	%state = ();
		894
		895	if (defined $_[1]) {
		896	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		897	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		898	}
		899
		900	# set-cookie processing
		901	if ($arg{cookie_jar}) {
		902	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		903	}
		904
		905	if ($redirect && exists $hdr{location}) {
		906	# we ignore any errors, as it is very common to receive
		907	# Content-Length != 0 but no actual body
		908	# we also access %hdr, as $_[1] might be an erro
		909	http_request (
		910	$method => $hdr{location},
		911	%arg,
		912	recurse => $recurse - 1,
		913	Redirect => [$_[0], \%hdr],
		914	$cb
		915	);
		916	} else {
		917	$cb->($_[0], \%hdr);
		918	}
		919	};
		920
		921	$ae_error = 597; # body phase
		922
		923	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		924
		925	my $len = $chunked ? undef : $hdr{"content-length"};
		926
		927	# body handling, many different code paths
		928	# - no body expected
		929	# - want_body_handle
		930	# - te chunked
		931	# - 2x length known (with or without on_body)
		932	# - 2x length not known (with or without on_body)
		933	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		934	$finish->(undef, 598 => "Request cancelled by on_header");
		935	} elsif (
		936	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		937	or $method eq "HEAD"
		938	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		939	) {
		940	# no body
		941	$finish->("", undef, undef, 1);
		942
		943	} elsif (!$redirect && $arg{want_body_handle}) {
		944	$_[0]->on_eof (undef);
		945	$_[0]->on_error (undef);
		946	$_[0]->on_read (undef);
		947
		948	$finish->(delete $state{handle});
		949
		950	} elsif ($chunked) {
		951	my $cl = 0;
		952	my $body = "";
		953	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		954
		955	$state{read_chunk} = sub {
		956	$_[1] =~ /^([0-9a-fA-F]+)/
		957	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		958
		959	my $len = hex $1;
		960
		961	if ($len) {
		962	$cl += $len;
		963
		964	$_[0]->push_read (chunk => $len, sub {
		965	$on_body->($_[1], \%hdr)
		966	or return $finish->(undef, 598 => "Request cancelled by on_body");
		967
		968	$_[0]->push_read (line => sub {
		969	length $_[1]
		970	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		971	$_[0]->push_read (line => $state{read_chunk});
		972	});
		973	});
		974	} else {
		975	$hdr{"content-length"} \|\|= $cl;
		976
		977	$_[0]->push_read (line => $qr_nlnl, sub {
		978	if (length $_[1]) {
		979	for ("$_[1]") {
		980	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		981
		982	my $hdr = _parse_hdr
		983	or return $finish->(undef, $ae_error => "Garbled response trailers");
		984
		985	%hdr = (%hdr, %$hdr);
		986	}
		987	}
		988
		989	$finish->($body, undef, undef, 1);
		990	});
		991	}
		992	};
		993
		994	$_[0]->push_read (line => $state{read_chunk});
		995
		996	} elsif ($arg{on_body}) {
		997	if (defined $len) {
		998	$_[0]->on_read (sub {
		999	$len -= length $_[0]{rbuf};
		1000
		1001	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1002	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1003
		1004	$len > 0
		1005	or $finish->("", undef, undef, 1);
		1006	});
		1007	} else {
		1008	$_[0]->on_eof (sub {
		1009	$finish->("");
		1010	});
		1011	$_[0]->on_read (sub {
		1012	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1013	or $finish->(undef, 598 => "Request cancelled by on_body");
		1014	});
		1015	}
		1016	} else {
		1017	$_[0]->on_eof (undef);
		1018
		1019	if (defined $len) {
		1020	$_[0]->on_read (sub {
		1021	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1022	if $len <= length $_[0]{rbuf};
		1023	});
		1024	} else {
		1025	$_[0]->on_error (sub {
		1026	($! == Errno::EPIPE \|\| !$!)
		1027	? $finish->(delete $_[0]{rbuf})
		1028	: $finish->(undef, $ae_error => $_[2]);
		1029	});
		1030	$_[0]->on_read (sub { });
		1031	}
		1032	}
		1033	};
		1034
		1035	# if keepalive is enabled, then the server closing the connection
		1036	# before a response can happen legally - we retry on idempotent methods.
		1037	if ($keptalive && $idempotent) {
		1038	my $old_eof = $hdl->{on_eof};
		1039	$hdl->{on_eof} = sub {
		1040	_destroy_state %state;
		1041
		1042	http_request (
		1043	$method => $url,
		1044	%arg,
		1045	keepalive => 0,
		1046	$cb
		1047	);
		1048	};
		1049	$hdl->on_read (sub {
		1050	return unless %state;
		1051
		1052	# as soon as we receive something, a connection close
		1053	# once more becomes a hard error
		1054	$hdl->{on_eof} = $old_eof;
		1055	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1056	});
		1057	} else {
		1058	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1059	}
		1060	};
		1061
		1062	my $prepare_handle = sub {
		1063	my ($hdl) = $state{handle};
		1064
		1065	$hdl->timeout ($timeout);
		1066	$hdl->on_error (sub {
		1067	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1068	});
		1069	$hdl->on_eof (sub {
		1070	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1071	});
		1072	};
		1073
		1074	# connected to proxy (or origin server)
		1075	my $connect_cb = sub {
		1076	my $fh = shift
		1077	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1078
		1079	return unless delete $state{connect_guard};
		1080
		1081	# get handle
		1082	$state{handle} = new AnyEvent::Handle
		1083	%{ $arg{handle_params} },
		1084	fh => $fh,
		1085	peername => $uhost,
		1086	tls_ctx => $arg{tls_ctx},
		1087	;
		1088
		1089	$prepare_handle->();
		1090
		1091	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1092
		1093	# now handle proxy-CONNECT method
		1094	if ($proxy && $uscheme eq "https") {
		1095	# oh dear, we have to wrap it into a connect request
		1096
		1097	# maybe re-use $uauthority with patched port?
		1098	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");
		1099	$state{handle}->push_read (line => $qr_nlnl, sub {
		1100	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1101	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1102
		1103	if ($2 == 200) {
		1104	$rpath = $upath;
		1105	$handle_actual_request->();
		1106	} else {
		1107	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1108	}
		1109	});
		1110	} else {
		1111	$handle_actual_request->();
		1112	}
		1113	};
657		1114
658	_get_slot $uhost, sub {	1115	_get_slot $uhost, sub {
659	$state{slot_guard} = shift;	1116	$state{slot_guard} = shift;
660		1117
661	return unless $state{connect_guard};	1118	return unless $state{connect_guard};
662		1119
663	my $ae_error = 595; # connecting	1120	# try to use an existing keepalive connection, but only if we, ourselves, plan
664		1121	# on a keepalive request (in theory, this should be a separate config option).
665	# handle actual, non-tunneled, request	1122	if ($keepalive && $KA_CACHE{$ka_key}) {
666	my $handle_actual_request = sub {	1123	$keptalive = 1;
667	$ae_error = 596; # request phase	1124	$state{handle} = ka_fetch $ka_key;
668		1125	$prepare_handle->();
669	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
670
671	# send request
672	$state{handle}->push_write (
673	"$method $rpath HTTP/1.1\015\012"
674	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
675	. "\015\012"
676	. (delete $arg{body})
677	);
678
679	# return if error occured during push_write()
680	return unless %state;
681
682	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
683
684	# status line and headers
685	$state{read_response} = sub {
686	for ("$_[1]") {
687	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
688
689	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
690	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
691
692	# 100 Continue handling
693	# should not happen as we don't send expect: 100-continue,
694	# but we handle it just in case.
695	# since we send the request body regardless, if we get an error
696	# we are out of-sync, which we currently do NOT handle correctly.
697	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
698	if $2 eq 100;
699
700	push @pseudo,
701	HTTPVersion => $1,
702	Status => $2,
703	Reason => $3,
704	;
705
706	my $hdr = parse_hdr
707	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
708
709	%hdr = (%$hdr, @pseudo);
710	}
711
712	# redirect handling
713	# microsoft and other shitheads don't give a shit for following standards,
714	# try to support some common forms of broken Location headers.
715	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
716	$hdr{location} =~ s/^\.\/+//;
717
718	my $url = "$rscheme://$uhost:$uport";
719
720	unless ($hdr{location} =~ s/^\///) {
721	$url .= $upath;
722	$url =~ s/\/[^\/]*$//;
723	}
724
725	$hdr{location} = "$url/$hdr{location}";
726	}
727
728	my $redirect;
729
730	if ($recurse) {
731	my $status = $hdr{Status};
732
733	# industry standard is to redirect POST as GET for
734	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
735	# also, the UA should ask the user for 301 and 307 and POST,
736	# industry standard seems to be to simply follow.
737	# we go with the industry standard.
738	if ($status == 301 or $status == 302 or $status == 303) {
739	# HTTP/1.1 is unclear on how to mutate the method
740	$method = "GET" unless $method eq "HEAD";
741	$redirect = 1;
742	} elsif ($status == 307) {
743	$redirect = 1;
744	}
745	}
746
747	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
748	my $may_keep_alive = $_[3];
749
750	$state{handle}->destroy if $state{handle};
751	%state = ();
752
753	if (defined $_[1]) {
754	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
755	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
756	}
757
758	# set-cookie processing
759	if ($arg{cookie_jar}) {
760	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
761	}
762
763	if ($redirect && exists $hdr{location}) {
764	# we ignore any errors, as it is very common to receive
765	# Content-Length != 0 but no actual body
766	# we also access %hdr, as $_[1] might be an erro
767	http_request (
768	$method => $hdr{location},
769	%arg,
770	recurse => $recurse - 1,
771	Redirect => [$_[0], \%hdr],
772	$cb);
773	} else {
774	$cb->($_[0], \%hdr);
775	}
776	};
777
778	$ae_error = 597; # body phase
779
780	my $len = $hdr{"content-length"};
781
782	# body handling, many different code paths
783	# - no body expected
784	# - want_body_handle
785	# - te chunked
786	# - 2x length known (with or without on_body)
787	# - 2x length not known (with or without on_body)
788	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
789	$finish->(undef, 598 => "Request cancelled by on_header");
790	} elsif (
791	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
792	or $method eq "HEAD"
793	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
794	) {
795	# no body
796	$finish->("", undef, undef, 1);
797
798	} elsif (!$redirect && $arg{want_body_handle}) {
799	$_[0]->on_eof (undef);
800	$_[0]->on_error (undef);
801	$_[0]->on_read (undef);
802
803	$finish->(delete $state{handle});
804
805	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
806	my $cl = 0;
807	my $body = undef;
808	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
809
810	$state{read_chunk} = sub {
811	$_[1] =~ /^([0-9a-fA-F]+)/
812	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
813
814	my $len = hex $1;
815
816	if ($len) {
817	$cl += $len;
818
819	$_[0]->push_read (chunk => $len, sub {
820	$on_body->($_[1], \%hdr)
821	or return $finish->(undef, 598 => "Request cancelled by on_body");
822
823	$_[0]->push_read (line => sub {
824	length $_[1]
825	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
826	$_[0]->push_read (line => $state{read_chunk});
827	});
828	});
829	} else {
830	$hdr{"content-length"} \|\|= $cl;
831
832	$_[0]->push_read (line => $qr_nlnl, sub {
833	if (length $_[1]) {
834	for ("$_[1]") {
835	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
836
837	my $hdr = parse_hdr
838	or return $finish->(undef, $ae_error => "Garbled response trailers");
839
840	%hdr = (%hdr, %$hdr);
841	}
842	}
843
844	$finish->($body, undef, undef, 1);
845	});
846	}
847	};
848
849	$_[0]->push_read (line => $state{read_chunk});
850
851	} elsif ($arg{on_body}) {
852	if (defined $len) {
853	$_[0]->on_read (sub {
854	$len -= length $_[0]{rbuf};
855
856	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
857	or return $finish->(undef, 598 => "Request cancelled by on_body");
858
859	$len > 0
860	or $finish->("", undef, undef, 1);
861	});
862	} else {
863	$_[0]->on_eof (sub {
864	$finish->("");
865	});
866	$_[0]->on_read (sub {
867	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
868	or $finish->(undef, 598 => "Request cancelled by on_body");
869	});
870	}
871	} else {
872	$_[0]->on_eof (undef);
873
874	if (defined $len) {
875	$_[0]->on_read (sub {
876	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
877	if $len <= length $_[0]{rbuf};
878	});
879	} else {
880	$_[0]->on_error (sub {
881	($! == Errno::EPIPE \|\| !$!)
882	? $finish->(delete $_[0]{rbuf})
883	: $finish->(undef, $ae_error => $_[2]);
884	});
885	$_[0]->on_read (sub { });
886	}
887	}
888	};
889
890	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
891	};
892
893	my $connect_cb = sub {
894	$state{fh} = shift
895	or do {
896	my $err = "$!";
897	%state = ();
898	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });
899	};
900
901	return unless delete $state{connect_guard};
902
903	# get handle
904	$state{handle} = new AnyEvent::Handle
905	fh => $state{fh},
906	peername => $rhost,
907	tls_ctx => $arg{tls_ctx},
908	# these need to be reconfigured on keepalive handles
909	timeout => $timeout,
910	on_error => sub {
911	%state = ();
912	$cb->(undef, { @pseudo, Status => $ae_error, Reason => $_[2] });
913	},
914	on_eof => sub {
915	%state = ();
916	$cb->(undef, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" });
917	},
918	;
919
920	# limit the number of persistent connections
921	# keepalive not yet supported
922	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
923	# ++$KA_COUNT{$_[1]};
924	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
925	# --$KA_COUNT{$_[1]}
926	# };
927	# $hdr{connection} = "keep-alive";
928	# }
929
930	$state{handle}->starttls ("connect") if $rscheme eq "https";
931
932	# now handle proxy-CONNECT method
933	if ($proxy && $uscheme eq "https") {
934	# oh dear, we have to wrap it into a connect request
935
936	# maybe re-use $uauthority with patched port?
937	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
938	$state{handle}->push_read (line => $qr_nlnl, sub {
939	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
940	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
941
942	if ($2 == 200) {
943	$rpath = $upath;
944	$handle_actual_request->();
945	} else {
946	%state = ();
947	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
948	}
949	});
950	} else {
951	$handle_actual_request->();	1126	$handle_actual_request->();
952	}
953	};
954		1127
		1128	} else {
955	my $tcp_connect = $arg{tcp_connect}	1129	my $tcp_connect = $arg{tcp_connect}
956	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1130	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
957		1131
958	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });	1132	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		1133	}
959	};	1134	};
960		1135
961	defined wantarray && AnyEvent::Util::guard { %state = () }	1136	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
962	}	1137	}
963		1138
964	sub http_get($@) {	1139	sub http_get($@) {
965	unshift @_, "GET";	1140	unshift @_, "GET";
966	&http_request	1141	&http_request
…		…
984	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1159	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
985	the actual connection, which in turn uses AnyEvent::DNS to resolve	1160	the actual connection, which in turn uses AnyEvent::DNS to resolve
986	hostnames. The latter is a simple stub resolver and does no caching	1161	hostnames. The latter is a simple stub resolver and does no caching
987	on its own. If you want DNS caching, you currently have to provide	1162	on its own. If you want DNS caching, you currently have to provide
988	your own default resolver (by storing a suitable resolver object in	1163	your own default resolver (by storing a suitable resolver object in
989	C<$AnyEvent::DNS::RESOLVER>).	1164	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
990		1165
991	=head2 GLOBAL FUNCTIONS AND VARIABLES	1166	=head2 GLOBAL FUNCTIONS AND VARIABLES
992		1167
993	=over 4	1168	=over 4
994		1169
995	=item AnyEvent::HTTP::set_proxy "proxy-url"	1170	=item AnyEvent::HTTP::set_proxy "proxy-url"
996		1171
997	Sets the default proxy server to use. The proxy-url must begin with a	1172	Sets the default proxy server to use. The proxy-url must begin with a
998	string of the form C<http://host:port> (optionally C<https:...>), croaks	1173	string of the form C<http://host:port>, croaks otherwise.
999	otherwise.
1000		1174
1001	To clear an already-set proxy, use C<undef>.	1175	To clear an already-set proxy, use C<undef>.
1002		1176
1003	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]	1177	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
1004		1178
…		…
1052		1226
1053	=item $AnyEvent::HTTP::MAX_RECURSE	1227	=item $AnyEvent::HTTP::MAX_RECURSE
1054		1228
1055	The default value for the C<recurse> request parameter (default: C<10>).	1229	The default value for the C<recurse> request parameter (default: C<10>).
1056		1230
		1231	=item $AnyEvent::HTTP::TIMEOUT
		1232
		1233	The default timeout for conenction operations (default: C<300>).
		1234
1057	=item $AnyEvent::HTTP::USERAGENT	1235	=item $AnyEvent::HTTP::USERAGENT
1058		1236
1059	The default value for the C<User-Agent> header (the default is	1237	The default value for the C<User-Agent> header (the default is
1060	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1238	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
1061		1239
1062	=item $AnyEvent::HTTP::MAX_PER_HOST	1240	=item $AnyEvent::HTTP::MAX_PER_HOST
1063		1241
1064	The maximum number of concurrent connections to the same host (identified	1242	The maximum number of concurrent connections to the same host (identified
1065	by the hostname). If the limit is exceeded, then the additional requests	1243	by the hostname). If the limit is exceeded, then the additional requests
1066	are queued until previous connections are closed.	1244	are queued until previous connections are closed. Both persistent and
		1245	non-persistent connections are counted in this limit.
1067		1246
1068	The default value for this is C<4>, and it is highly advisable to not	1247	The default value for this is C<4>, and it is highly advisable to not
1069	increase it.	1248	increase it much.
		1249
		1250	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1251	connections, older browsers used 2, newers (such as firefox 3) typically
		1252	use 6, and Opera uses 8 because like, they have the fastest browser and
		1253	give a shit for everybody else on the planet.
		1254
		1255	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1256
		1257	The time after which idle persistent conenctions get closed by
		1258	AnyEvent::HTTP (default: C<3>).
1070		1259
1071	=item $AnyEvent::HTTP::ACTIVE	1260	=item $AnyEvent::HTTP::ACTIVE
1072		1261
1073	The number of active connections. This is not the number of currently	1262	The number of active connections. This is not the number of currently
1074	running requests, but the number of currently open and non-idle TCP	1263	running requests, but the number of currently open and non-idle TCP
1075	connections. This number of can be useful for load-leveling.	1264	connections. This number can be useful for load-leveling.
1076		1265
1077	=back	1266	=back
1078		1267
1079	=cut	1268	=cut
1080		1269
…		…
1123	undef	1312	undef
1124	}	1313	}
1125		1314
1126	sub set_proxy($) {	1315	sub set_proxy($) {
1127	if (length $_[0]) {	1316	if (length $_[0]) {
1128	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1317	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1129	or Carp::croak "$_[0]: invalid proxy URL";	1318	or Carp::croak "$_[0]: invalid proxy URL";
1130	$PROXY = [$2, $3 \|\| 3128, $1]	1319	$PROXY = [$2, $3 \|\| 3128, $1]
1131	} else {	1320	} else {
1132	undef $PROXY;	1321	undef $PROXY;
1133	}	1322	}
…		…
1136	# initialise proxy from environment	1325	# initialise proxy from environment
1137	eval {	1326	eval {
1138	set_proxy $ENV{http_proxy};	1327	set_proxy $ENV{http_proxy};
1139	};	1328	};
1140		1329
		1330	=head2 SHOWCASE
		1331
		1332	This section contaisn some more elaborate "real-world" examples or code
		1333	snippets.
		1334
		1335	=head2 HTTP/1.1 FILE DOWNLOAD
		1336
		1337	Downloading files with HTTP can be quite tricky, especially when something
		1338	goes wrong and you want to resume.
		1339
		1340	Here is a function that initiates and resumes a download. It uses the
		1341	last modified time to check for file content changes, and works with many
		1342	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1343	on older servers.
		1344
		1345	It calls the completion callback with either C<undef>, which means a
		1346	nonretryable error occured, C<0> when the download was partial and should
		1347	be retried, and C<1> if it was successful.
		1348
		1349	use AnyEvent::HTTP;
		1350
		1351	sub download($$$) {
		1352	my ($url, $file, $cb) = @_;
		1353
		1354	open my $fh, "+<", $file
		1355	or die "$file: $!";
		1356
		1357	my %hdr;
		1358	my $ofs = 0;
		1359
		1360	warn stat $fh;
		1361	warn -s _;
		1362	if (stat $fh and -s _) {
		1363	$ofs = -s _;
		1364	warn "-s is ", $ofs;#d#
		1365	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1366	$hdr{"range"} = "bytes=$ofs-";
		1367	}
		1368
		1369	http_get $url,
		1370	headers => \%hdr,
		1371	on_header => sub {
		1372	my ($hdr) = @_;
		1373
		1374	if ($hdr->{Status} == 200 && $ofs) {
		1375	# resume failed
		1376	truncate $fh, $ofs = 0;
		1377	}
		1378
		1379	sysseek $fh, $ofs, 0;
		1380
		1381	1
		1382	},
		1383	on_body => sub {
		1384	my ($data, $hdr) = @_;
		1385
		1386	if ($hdr->{Status} =~ /^2/) {
		1387	length $data == syswrite $fh, $data
		1388	or return; # abort on write errors
		1389	}
		1390
		1391	1
		1392	},
		1393	sub {
		1394	my (undef, $hdr) = @_;
		1395
		1396	my $status = $hdr->{Status};
		1397
		1398	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1399	utime $fh, $time, $time;
		1400	}
		1401
		1402	if ($status == 200 \|\| $status == 206 \|\| $status == 416) {
		1403	# download ok \|\| resume ok \|\| file already fully downloaded
		1404	$cb->(1, $hdr);
		1405
		1406	} elsif ($status == 412) {
		1407	# file has changed while resuming, delete and retry
		1408	unlink $file;
		1409	$cb->(0, $hdr);
		1410
		1411	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1412	# retry later
		1413	$cb->(0, $hdr);
		1414
		1415	} else {
		1416	$cb->(undef, $hdr);
		1417	}
		1418	}
		1419	;
		1420	}
		1421
		1422	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1423	if ($_[0]) {
		1424	print "OK!\n";
		1425	} elsif (defined $_[0]) {
		1426	print "please retry later\n";
		1427	} else {
		1428	print "ERROR\n";
		1429	}
		1430	};
		1431
1141	=head2 SOCKS PROXIES	1432	=head3 SOCKS PROXIES
1142		1433
1143	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1434	Socks proxies are not directly supported by AnyEvent::HTTP. You can
1144	compile your perl to support socks, or use an external program such as	1435	compile your perl to support socks, or use an external program such as
1145	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy	1436	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
1146	transparently.	1437	transparently.

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.85 by root, Sun Jan 2 05:31:56 2011 UTC vs. Revision 1.99 by root, Fri Jan 28 01:17:25 2011 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.85 by root, Sun Jan 2 05:31:56 2011 UTC vs.
Revision 1.99 by root, Fri Jan 28 01:17:25 2011 UTC