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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.6 by root, Wed Jun 4 12:05:45 2008 UTC vs.
Revision 1.89 by root, Mon Jan 3 00:23:25 2011 UTC

…		…
3	AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client	3	AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client
4		4
5	=head1 SYNOPSIS	5	=head1 SYNOPSIS
6		6
7	use AnyEvent::HTTP;	7	use AnyEvent::HTTP;
		8
		9	http_get "http://www.nethype.de/", sub { print $_[1] };
		10
		11	# ... do something else here
8		12
9	=head1 DESCRIPTION	13	=head1 DESCRIPTION
10		14
11	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
12	run a supported event loop.	16	run a supported event loop.
13		17
		18	This module implements a simple, stateless and non-blocking HTTP
		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
		21	automatically limits the number of connections to the values specified in
		22	the RFC.
		23
		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
		26	possible as the user retains control over request and response headers.
		27
		28	The caller is responsible for authentication management, cookies (if
		29	the simplistic implementation in this module doesn't suffice), referer
		30	and other high-level protocol details for which this module offers only
		31	limited support.
		32
14	=head2 METHODS	33	=head2 METHODS
15		34
16	=over 4	35	=over 4
17		36
18	=cut	37	=cut
19		38
20	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
21		40
22	use strict;	41	use common::sense;
23	no warnings;
24		42
25	use Carp;	43	use Errno ();
26		44
27	use AnyEvent ();	45	use AnyEvent 5.0 ();
28	use AnyEvent::Util ();	46	use AnyEvent::Util ();
29	use AnyEvent::Socket ();
30	use AnyEvent::Handle ();	47	use AnyEvent::Handle ();
31		48
32	use base Exporter::;	49	use base Exporter::;
33		50
34	our $VERSION = '1.0';	51	our $VERSION = '1.5';
35		52
36	our @EXPORT = qw(http_get http_request);	53	our @EXPORT = qw(http_get http_post http_head http_request);
37		54
38	our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	55	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
39	our $MAX_RECURSE = 10;	56	our $MAX_RECURSE = 10;
40	our $MAX_PERSISTENT = 8;	57	our $MAX_PERSISTENT = 8;
41	our $PERSISTENT_TIMEOUT = 2;	58	our $PERSISTENT_TIMEOUT = 2;
42	our $TIMEOUT = 300;	59	our $TIMEOUT = 300;
43		60
44	# changing these is evil	61	# changing these is evil
45	our $MAX_PERSISTENT_PER_HOST = 2;	62	our $MAX_PERSISTENT_PER_HOST = 2;
46	our $MAX_PER_HOST = 4; # not respected yet :(	63	our $MAX_PER_HOST = 4;
47		64
48	our $PROXY;	65	our $PROXY;
		66	our $ACTIVE = 0;
49		67
50	my %KA_COUNT; # number of open keep-alive connections per host	68	my %KA_COUNT; # number of open keep-alive connections per host
		69	my %CO_SLOT; # number of open connections, and wait queue, per host
51		70
52	=item http_get $url, key => value..., $cb->($data, $headers)	71	=item http_get $url, key => value..., $cb->($data, $headers)
53		72
54	Executes an HTTP-GET request. See the http_request function for details on	73	Executes an HTTP-GET request. See the http_request function for details on
55	additional parameters.	74	additional parameters and the return value.
56		75
57	=item http_head $url, key => value..., $cb->($data, $headers)	76	=item http_head $url, key => value..., $cb->($data, $headers)
58		77
59	Executes an HTTP-HEAD request. See the http_request function for details on	78	Executes an HTTP-HEAD request. See the http_request function for details
60	additional parameters.	79	on additional parameters and the return value.
61		80
62	=item http_post $url, $body, key => value..., $cb->($data, $headers)	81	=item http_post $url, $body, key => value..., $cb->($data, $headers)
63		82
64	Executes an HTTP-POST request with a requets body of C<$bod>. See the	83	Executes an HTTP-POST request with a request body of C<$body>. See the
65	http_request function for details on additional parameters.	84	http_request function for details on additional parameters and the return
		85	value.
66		86
67	=item http_request $method => $url, key => value..., $cb->($data, $headers)	87	=item http_request $method => $url, key => value..., $cb->($data, $headers)
68		88
69	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL	89	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
70	must be an absolute http or https URL.	90	must be an absolute http or https URL.
71		91
		92	When called in void context, nothing is returned. In other contexts,
		93	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
		95	destroyed before the callback is called, the request will be cancelled.
		96
72	The callback will be called with the response data as first argument	97	The callback will be called with the response body data as first argument
73	(or C<undef> if it wasn't available due to errors), and a hash-ref with	98	(or C<undef> if an error occured), and a hash-ref with response headers
74	response headers as second argument.	99	(and trailers) as second argument.
75		100
76	All the headers in that has are lowercased. In addition to the response	101	All the headers in that hash are lowercased. In addition to the response
77	headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and	102	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
78	C<Reason> contain the three parts of the HTTP Status-Line of the same	103	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
79	name.	104	three parts of the HTTP Status-Line of the same name. If an error occurs
		105	during the body phase of a request, then the original C<Status> and
		106	C<Reason> values from the header are available as C<OrigStatus> and
		107	C<OrigReason>.
		108
		109	The pseudo-header C<URL> contains the actual URL (which can differ from
		110	the requested URL when following redirects - for example, you might get
		111	an error that your URL scheme is not supported even though your URL is a
		112	valid http URL because it redirected to an ftp URL, in which case you can
		113	look at the URL pseudo header).
		114
		115	The pseudo-header C<Redirect> only exists when the request was a result
		116	of an internal redirect. In that case it is an array reference with
		117	the C<($data, $headers)> from the redirect response. Note that this
		118	response could in turn be the result of a redirect itself, and C<<
		119	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		120	response, and so on.
		121
		122	If the server sends a header multiple times, then their contents will be
		123	joined together with a comma (C<,>), as per the HTTP spec.
80		124
81	If an internal error occurs, such as not being able to resolve a hostname,	125	If an internal error occurs, such as not being able to resolve a hostname,
82	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	126	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be
83	and the C<Reason> pseudo-header will contain an error message.	127	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
		128	message. Currently the following status codes are used:
		129
		130	=over 4
		131
		132	=item 595 - errors during connection etsbalishment, proxy handshake.
		133
		134	=item 596 - errors during TLS negotiation, request sending and header processing.
		135
		136	=item 597 - errors during body receiving or processing.
		137
		138	=item 598 - user aborted request via C<on_header> or C<on_body>.
		139
		140	=item 599 - other, usually nonretryable, errors (garbled URL etc.).
		141
		142	=back
84		143
85	A typical callback might look like this:	144	A typical callback might look like this:
86		145
87	sub {	146	sub {
88	my ($body, $hdr) = @_;	147	my ($body, $hdr) = @_;
…		…
104	Whether to recurse requests or not, e.g. on redirects, authentication	163	Whether to recurse requests or not, e.g. on redirects, authentication
105	retries and so on, and how often to do so.	164	retries and so on, and how often to do so.
106		165
107	=item headers => hashref	166	=item headers => hashref
108		167
109	The request headers to use.	168	The request headers to use. Currently, C<http_request> may provide its own
		169	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
		170	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
		172	they won't be sent at all).
110		173
111	=item timeout => $seconds	174	=item timeout => $seconds
112		175
113	The time-out to use for various stages - each connect attempt will reset	176	The time-out to use for various stages - each connect attempt will reset
114	the timeout, as will read or write activity. Default timeout is 5 minutes.	177	the timeout, as will read or write activity, i.e. this is not an overall
		178	timeout.
		179
		180	Default timeout is 5 minutes.
115		181
116	=item proxy => [$host, $port[, $scheme]] or undef	182	=item proxy => [$host, $port[, $scheme]] or undef
117		183
118	Use the given http proxy for all requests. If not specified, then the	184	Use the given http proxy for all requests. If not specified, then the
119	default proxy (as specified by C<$ENV{http_proxy}>) is used.	185	default proxy (as specified by C<$ENV{http_proxy}>) is used.
120		186
121	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	187	C<$scheme> must be either missing, C<http> for HTTP or C<https> for
122	HTTPS.	188	HTTPS.
123		189
124	=item body => $string	190	=item body => $string
125		191
126	The request body, usually empty. Will be-sent as-is (future versions of	192	The request body, usually empty. Will be sent as-is (future versions of
127	this module might offer more options).	193	this module might offer more options).
128		194
		195	=item cookie_jar => $hash_ref
		196
		197	Passing this parameter enables (simplified) cookie-processing, loosely
		198	based on the original netscape specification.
		199
		200	The C<$hash_ref> must be an (initially empty) hash reference which
		201	will get updated automatically. It is possible to save the cookie jar
		202	to persistent storage with something like JSON or Storable - see the
		203	C<AnyEvent::HTTP::cookie_jar_expire> function if you wish to remove
		204	expired or session-only cookies, and also for documentation on the format
		205	of the cookie jar.
		206
		207	Note that this cookie implementation is not meant to be complete. If
		208	you want complete cookie management you have to do that on your
		209	own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites
		210	working. Cookies are a privacy disaster, do not use them unless required
		211	to.
		212
		213	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
		214	headers will be set and handled by this module, otherwise they will be
		215	left untouched.
		216
		217	=item tls_ctx => $scheme \| $tls_ctx
		218
		219	Specifies the AnyEvent::TLS context to be used for https connections. This
		220	parameter follows the same rules as the C<tls_ctx> parameter to
		221	L<AnyEvent::Handle>, but additionally, the two strings C<low> or
		222	C<high> can be specified, which give you a predefined low-security (no
		223	verification, highest compatibility) and high-security (CA and common-name
		224	verification) TLS context.
		225
		226	The default for this option is C<low>, which could be interpreted as "give
		227	me the page, no matter what".
		228
		229	=item on_prepare => $callback->($fh)
		230
		231	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
		233	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		234	and behaves exactly the same way (e.g. it has to provide a
		235	timeout). See the description for the C<$prepare_cb> argument of
		236	C<AnyEvent::Socket::tcp_connect> for details.
		237
		238	=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
		239
		240	In even rarer cases you want total control over how AnyEvent::HTTP
		241	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
		242	to do this, but you can provide your own C<tcp_connect> function -
		243	obviously, it has to follow the same calling conventions, except that it
		244	may always return a connection guard object.
		245
		246	There are probably lots of weird uses for this function, starting from
		247	tracing the hosts C<http_request> actually tries to connect, to (inexact
		248	but fast) host => IP address caching or even socks protocol support.
		249
		250	=item on_header => $callback->($headers)
		251
		252	When specified, this callback will be called with the header hash as soon
		253	as headers have been successfully received from the remote server (not on
		254	locally-generated errors).
		255
		256	It has to return either true (in which case AnyEvent::HTTP will continue),
		257	or false, in which case AnyEvent::HTTP will cancel the download (and call
		258	the finish callback with an error code of C<598>).
		259
		260	This callback is useful, among other things, to quickly reject unwanted
		261	content, which, if it is supposed to be rare, can be faster than first
		262	doing a C<HEAD> request.
		263
		264	The downside is that cancelling the request makes it impossible to re-use
		265	the connection. Also, the C<on_header> callback will not receive any
		266	trailer (headers sent after the response body).
		267
		268	Example: cancel the request unless the content-type is "text/html".
		269
		270	on_header => sub {
		271	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		272	},
		273
		274	=item on_body => $callback->($partial_body, $headers)
		275
		276	When specified, all body data will be passed to this callback instead of
		277	to the completion callback. The completion callback will get the empty
		278	string instead of the body data.
		279
		280	It has to return either true (in which case AnyEvent::HTTP will continue),
		281	or false, in which case AnyEvent::HTTP will cancel the download (and call
		282	the completion callback with an error code of C<598>).
		283
		284	The downside to cancelling the request is that it makes it impossible to
		285	re-use the connection.
		286
		287	This callback is useful when the data is too large to be held in memory
		288	(so the callback writes it to a file) or when only some information should
		289	be extracted, or when the body should be processed incrementally.
		290
		291	It is usually preferred over doing your own body handling via
		292	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		293	only used to create a connection, C<want_body_handle> is the better
		294	alternative, as it allows you to install your own event handler, reducing
		295	resource usage.
		296
		297	=item want_body_handle => $enable
		298
		299	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		300	changes considerably: after parsing the headers, and instead of
		301	downloading the body (if any), the completion callback will be
		302	called. Instead of the C<$body> argument containing the body data, the
		303	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
		305	(e.g. status C<304>), the empty string will be passed.
		306
		307	The handle object might or might not be in TLS mode, might be connected to
		308	a proxy, be a persistent connection etc., and configured in unspecified
		309	ways. The user is responsible for this handle (it will not be used by this
		310	module anymore).
		311
		312	This is useful with some push-type services, where, after the initial
		313	headers, an interactive protocol is used (typical example would be the
		314	push-style twitter API which starts a JSON/XML stream).
		315
		316	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.
		318
129	=back	319	=back
130		320
131	=back	321	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		322	the response body.
		323
		324	http_request GET => "http://www.nethype.de/", sub {
		325	my ($body, $hdr) = @_;
		326	print "$body\n";
		327	};
		328
		329	Example: do a HTTP HEAD request on https://www.google.com/, use a
		330	timeout of 30 seconds.
		331
		332	http_request
		333	GET => "https://www.google.com",
		334	timeout => 30,
		335	sub {
		336	my ($body, $hdr) = @_;
		337	use Data::Dumper;
		338	print Dumper $hdr;
		339	}
		340	;
		341
		342	Example: do another simple HTTP GET request, but immediately try to
		343	cancel it.
		344
		345	my $request = http_request GET => "http://www.nethype.de/", sub {
		346	my ($body, $hdr) = @_;
		347	print "$body\n";
		348	};
		349
		350	undef $request;
132		351
133	=cut	352	=cut
134		353
		354	sub _slot_schedule;
		355	sub _slot_schedule($) {
		356	my $host = shift;
		357
		358	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
		359	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
		360	# somebody wants that slot
		361	++$CO_SLOT{$host}[0];
		362	++$ACTIVE;
		363
		364	$cb->(AnyEvent::Util::guard {
		365	--$ACTIVE;
		366	--$CO_SLOT{$host}[0];
		367	_slot_schedule $host;
		368	});
		369	} else {
		370	# nobody wants the slot, maybe we can forget about it
		371	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
		372	last;
		373	}
		374	}
		375	}
		376
		377	# wait for a free slot on host, call callback
		378	sub _get_slot($$) {
		379	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
		380
		381	_slot_schedule $_[0];
		382	}
		383
		384	#############################################################################
		385
		386	# expire cookies
		387	sub cookie_jar_expire($;$) {
		388	my ($jar, $session_end) = @_;
		389
		390	%$jar = () if $jar->{version} != 1;
		391
		392	my $anow = AE::now;
		393
		394	while (my ($chost, $paths) = each %$jar) {
		395	next unless ref $paths;
		396
		397	while (my ($cpath, $cookies) = each %$paths) {
		398	while (my ($cookie, $kv) = each %$cookies) {
		399	if (exists $kv->{_expires}) {
		400	delete $cookies->{$cookie}
		401	if $anow > $kv->{_expires};
		402	} elsif ($session_end) {
		403	delete $cookies->{$cookie};
		404	}
		405	}
		406
		407	delete $paths->{$cpath}
		408	unless %$cookies;
		409	}
		410
		411	delete $jar->{$chost}
		412	unless %$paths;
		413	}
		414	}
		415
		416	# extract cookies from jar
		417	sub cookie_jar_extract($$$$) {
		418	my ($jar, $uscheme, $uhost, $upath) = @_;
		419
		420	%$jar = () if $jar->{version} != 1;
		421
		422	my @cookies;
		423
		424	while (my ($chost, $paths) = each %$jar) {
		425	next unless ref $paths;
		426
		427	if ($chost =~ /^\./) {
		428	next unless $chost eq substr $uhost, -length $chost;
		429	} elsif ($chost =~ /\./) {
		430	next unless $chost eq $uhost;
		431	} else {
		432	next;
		433	}
		434
		435	while (my ($cpath, $cookies) = each %$paths) {
		436	next unless $cpath eq substr $upath, 0, length $cpath;
		437
		438	while (my ($cookie, $kv) = each %$cookies) {
		439	next if $uscheme ne "https" && exists $kv->{secure};
		440
		441	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
		442	delete $cookies->{$cookie};
		443	next;
		444	}
		445
		446	my $value = $kv->{value};
		447
		448	if ($value =~ /[=;,[:space:]]/) {
		449	$value =~ s/([\\"])/\\$1/g;
		450	$value = "\"$value\"";
		451	}
		452
		453	push @cookies, "$cookie=$value";
		454	}
		455	}
		456	}
		457
		458	\@cookies
		459	}
		460
		461	# parse set_cookie header into jar
		462	sub cookie_jar_set_cookie($$$$) {
		463	my ($jar, $set_cookie, $uhost, $date) = @_;
		464
		465	my $anow = int AE::now;
		466	my $snow; # server-now
		467
		468	for ($set_cookie) {
		469	# parse NAME=VALUE
		470	my @kv;
		471
		472	# expires is not http-compliant in the original cookie-spec,
		473	# we support the official date format and some extensions
		474	while (
		475	m{
		476	\G\s*
		477	(?:
		478	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
		479	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) ) )?
		480	)
		481	}gcxsi
		482	) {
		483	my $name = $2;
		484	my $value = $4;
		485
		486	if (defined $1) {
		487	# expires
		488	$name = "expires";
		489	$value = $1;
		490	} elsif (defined $3) {
		491	# quoted
		492	$value = $3;
		493	$value =~ s/\\(.)/$1/gs;
		494	}
		495
		496	push @kv, lc $name, $value;
		497
		498	last unless /\G\s*;/gc;
		499	}
		500
		501	last unless @kv;
		502
		503	my $name = shift @kv;
		504	my %kv = (value => shift @kv, @kv);
		505
		506	if (exists $kv{"max-age"}) {
		507	$kv{_expires} = $anow + delete $kv{"max-age"};
		508	} elsif (exists $kv{expires}) {
		509	$snow \|\|= parse_date ($date) \|\| $anow;
		510	$kv{_expires} = $anow + (parse_date (delete $kv{expires}) - $snow);
		511	} else {
		512	delete $kv{_expires};
		513	}
		514
		515	my $cdom;
		516	my $cpath = (delete $kv{path}) \|\| "/";
		517
		518	if (exists $kv{domain}) {
		519	$cdom = delete $kv{domain};
		520
		521	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		522
		523	next if $cdom =~ /\.$/;
		524
		525	# this is not rfc-like and not netscape-like. go figure.
		526	my $ndots = $cdom =~ y/.//;
		527	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		528	} else {
		529	$cdom = $uhost;
		530	}
		531
		532	# store it
		533	$jar->{version} = 1;
		534	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
		535
		536	redo if /\G\s*,/gc;
		537	}
		538	}
		539
		540	# continue to parse $_ for headers and place them into the arg
		541	sub parse_hdr() {
		542	my %hdr;
		543
		544	# things seen, not parsed:
		545	# p3pP="NON CUR OTPi OUR NOR UNI"
		546
		547	$hdr{lc $1} .= ",$2"
		548	while /\G
		549	([^:\000-\037]*):
		550	[\011\040]*
		551	((?: [^\012]+ \| \012[\011\040] )*)
		552	\012
		553	/gxc;
		554
		555	/\G$/
		556	or return;
		557
		558	# remove the "," prefix we added to all headers above
		559	substr $_, 0, 1, ""
		560	for values %hdr;
		561
		562	\%hdr
		563	}
		564
		565	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		566
		567	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		568	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		569
135	sub http_request($$$;@) {	570	sub http_request($$@) {
136	my $cb = pop;	571	my $cb = pop;
137	my ($method, $url, %arg) = @_;	572	my ($method, $url, %arg) = @_;
138		573
139	my %hdr;	574	my %hdr;
140		575
		576	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		577	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
		578
141	$method = uc $method;	579	$method = uc $method;
142		580
143	if (my $hdr = delete $arg{headers}) {	581	if (my $hdr = $arg{headers}) {
144	while (my ($k, $v) = each %$hdr) {	582	while (my ($k, $v) = each %$hdr) {
145	$hdr{lc $k} = $v;	583	$hdr{lc $k} = $v;
146	}	584	}
147	}	585	}
148		586
		587	# pseudo headers for all subsequent responses
		588	my @pseudo = (URL => $url);
		589	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		590
		591	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
		592
		593	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
		594	if $recurse < 0;
		595
149	my $proxy = $arg{proxy} \|\| $PROXY;	596	my $proxy = $arg{proxy} \|\| $PROXY;
150	my $timeout = $arg{timeout} \|\| $TIMEOUT;	597	my $timeout = $arg{timeout} \|\| $TIMEOUT;
151	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;
152		598
153	$hdr{"user-agent"} \|\|= $USERAGENT;	599	my ($uscheme, $uauthority, $upath, $query, $fragment) =
		600	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
154		601
155	my ($host, $port, $path, $scheme);	602	$uscheme = lc $uscheme;
		603
		604	my $uport = $uscheme eq "http" ? 80
		605	: $uscheme eq "https" ? 443
		606	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
		607
		608	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
		609	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
		610
		611	my $uhost = lc $1;
		612	$uport = $2 if defined $2;
		613
		614	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		615	unless exists $hdr{host};
		616
		617	$uhost =~ s/^\[(.*)\]$/$1/;
		618	$upath .= $query if length $query;
		619
		620	$upath =~ s%^/?%/%;
		621
		622	# cookie processing
		623	if (my $jar = $arg{cookie_jar}) {
		624	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
		625
		626	$hdr{cookie} = join "; ", @$cookies
		627	if @$cookies;
		628	}
		629
		630	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
156		631
157	if ($proxy) {	632	if ($proxy) {
158	($host, $port, $scheme) = @$proxy;	633	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
159	$path = $url;	634
		635	$rscheme = "http" unless defined $rscheme;
		636
		637	# don't support https requests over https-proxy transport,
		638	# can't be done with tls as spec'ed, unless you double-encrypt.
		639	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		640
		641	$rhost = lc $rhost;
		642	$rscheme = lc $rscheme;
160	} else {	643	} else {
161	($scheme, my $authority, $path, my $query, my $fragment) =	644	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
162	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;
163
164	$port = $scheme eq "http" ? 80
165	: $scheme eq "https" ? 443
166	: croak "$url: only http and https URLs supported";
167
168	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
169	or croak "$authority: unparsable URL";
170
171	$host = $1;
172	$port = $2 if defined $2;
173
174	$host =~ s/^\[(.*)\]$/$1/;
175	$path .= "?$query" if length $query;
176
177	$path = "/" unless $path;
178
179	$hdr{host} = $host = lc $host;
180	}	645	}
181		646
182	$scheme = lc $scheme;	647	# leave out fragment and query string, just a heuristic
		648	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		649	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
183		650
184	my %state;
185
186	$state{body} = delete $arg{body};
187
188	$hdr{"content-length"} = length $state{body};	651	$hdr{"content-length"} = length $arg{body}
		652	if length $arg{body} \|\| $method ne "GET";
189		653
190	$state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub {	654	my $idempotent = $method =~ /^(?:GET\|HEAD\|PUT\|DELETE\|OPTIONS\|TRACE)$/;
		655
		656	# default value for keepalive is true iff the request is for an idempotent method
		657	my $keepalive = exists $arg{keepalive}
		658	? $arg{keepalive}*1
		659	: $idempotent ? $PERSISTENT_TIMEOUT : 0;
		660
		661	$hdr{connection} = ($keepalive ? "" : "close ") . "Te"; #1.1
		662	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
		663
		664	my %state = (connect_guard => 1);
		665
		666	my $ae_error = 595; # connecting
		667
		668	# handle actual, non-tunneled, request
		669	my $handle_actual_request = sub {
		670	$ae_error = 596; # request phase
		671
		672	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		673
		674	# send request
		675	$state{handle}->push_write (
		676	"$method $rpath HTTP/1.1\015\012"
		677	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		678	. "\015\012"
		679	. (delete $arg{body})
		680	);
		681
		682	# return if error occured during push_write()
		683	return unless %state;
		684
		685	# reduce memory usage, save a kitten, also re-use it for the response headers.
		686	%hdr = ();
		687
		688	# status line and headers
		689	$state{read_response} = sub {
		690	for ("$_[1]") {
		691	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		692
		693	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
		694	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
		695
		696	# 100 Continue handling
		697	# should not happen as we don't send expect: 100-continue,
		698	# but we handle it just in case.
		699	# since we send the request body regardless, if we get an error
		700	# we are out of-sync, which we currently do NOT handle correctly.
		701	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		702	if $2 eq 100;
		703
		704	push @pseudo,
		705	HTTPVersion => $1,
		706	Status => $2,
		707	Reason => $3,
		708	;
		709
		710	my $hdr = parse_hdr
		711	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
		712
		713	%hdr = (%$hdr, @pseudo);
		714	}
		715
		716	# redirect handling
		717	# microsoft and other shitheads don't give a shit for following standards,
		718	# try to support some common forms of broken Location headers.
		719	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		720	$hdr{location} =~ s/^\.\/+//;
		721
		722	my $url = "$rscheme://$uhost:$uport";
		723
		724	unless ($hdr{location} =~ s/^\///) {
		725	$url .= $upath;
		726	$url =~ s/\/[^\/]*$//;
		727	}
		728
		729	$hdr{location} = "$url/$hdr{location}";
		730	}
		731
		732	my $redirect;
		733
		734	if ($recurse) {
		735	my $status = $hdr{Status};
		736
		737	# industry standard is to redirect POST as GET for
		738	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		739	# also, the UA should ask the user for 301 and 307 and POST,
		740	# industry standard seems to be to simply follow.
		741	# we go with the industry standard.
		742	if ($status == 301 or $status == 302 or $status == 303) {
		743	# HTTP/1.1 is unclear on how to mutate the method
		744	$method = "GET" unless $method eq "HEAD";
		745	$redirect = 1;
		746	} elsif ($status == 307) {
		747	$redirect = 1;
		748	}
		749	}
		750
		751	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
		752	my $may_keep_alive = $_[3];
		753
		754	$state{handle}->destroy if $state{handle};
		755	%state = ();
		756
		757	if (defined $_[1]) {
		758	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		759	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		760	}
		761
		762	# set-cookie processing
		763	if ($arg{cookie_jar}) {
		764	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		765	}
		766
		767	if ($redirect && exists $hdr{location}) {
		768	# we ignore any errors, as it is very common to receive
		769	# Content-Length != 0 but no actual body
		770	# we also access %hdr, as $_[1] might be an erro
		771	http_request (
		772	$method => $hdr{location},
		773	%arg,
		774	recurse => $recurse - 1,
		775	Redirect => [$_[0], \%hdr],
		776	$cb);
		777	} else {
		778	$cb->($_[0], \%hdr);
		779	}
		780	};
		781
		782	$ae_error = 597; # body phase
		783
		784	my $len = $hdr{"content-length"};
		785
		786	# body handling, many different code paths
		787	# - no body expected
		788	# - want_body_handle
		789	# - te chunked
		790	# - 2x length known (with or without on_body)
		791	# - 2x length not known (with or without on_body)
		792	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		793	$finish->(undef, 598 => "Request cancelled by on_header");
		794	} elsif (
		795	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		796	or $method eq "HEAD"
		797	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		798	) {
		799	# no body
		800	$finish->("", undef, undef, 1);
		801
		802	} elsif (!$redirect && $arg{want_body_handle}) {
		803	$_[0]->on_eof (undef);
		804	$_[0]->on_error (undef);
		805	$_[0]->on_read (undef);
		806
		807	$finish->(delete $state{handle});
		808
		809	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
		810	my $cl = 0;
		811	my $body = undef;
		812	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		813
		814	$state{read_chunk} = sub {
		815	$_[1] =~ /^([0-9a-fA-F]+)/
		816	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		817
		818	my $len = hex $1;
		819
		820	if ($len) {
		821	$cl += $len;
		822
		823	$_[0]->push_read (chunk => $len, sub {
		824	$on_body->($_[1], \%hdr)
		825	or return $finish->(undef, 598 => "Request cancelled by on_body");
		826
		827	$_[0]->push_read (line => sub {
		828	length $_[1]
		829	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		830	$_[0]->push_read (line => $state{read_chunk});
		831	});
		832	});
		833	} else {
		834	$hdr{"content-length"} \|\|= $cl;
		835
		836	$_[0]->push_read (line => $qr_nlnl, sub {
		837	if (length $_[1]) {
		838	for ("$_[1]") {
		839	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		840
		841	my $hdr = parse_hdr
		842	or return $finish->(undef, $ae_error => "Garbled response trailers");
		843
		844	%hdr = (%hdr, %$hdr);
		845	}
		846	}
		847
		848	$finish->($body, undef, undef, 1);
		849	});
		850	}
		851	};
		852
		853	$_[0]->push_read (line => $state{read_chunk});
		854
		855	} elsif ($arg{on_body}) {
		856	if (defined $len) {
		857	$_[0]->on_read (sub {
		858	$len -= length $_[0]{rbuf};
		859
		860	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		861	or return $finish->(undef, 598 => "Request cancelled by on_body");
		862
		863	$len > 0
		864	or $finish->("", undef, undef, 1);
		865	});
		866	} else {
		867	$_[0]->on_eof (sub {
		868	$finish->("");
		869	});
		870	$_[0]->on_read (sub {
		871	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		872	or $finish->(undef, 598 => "Request cancelled by on_body");
		873	});
		874	}
		875	} else {
		876	$_[0]->on_eof (undef);
		877
		878	if (defined $len) {
		879	$_[0]->on_read (sub {
		880	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		881	if $len <= length $_[0]{rbuf};
		882	});
		883	} else {
		884	$_[0]->on_error (sub {
		885	($! == Errno::EPIPE \|\| !$!)
		886	? $finish->(delete $_[0]{rbuf})
		887	: $finish->(undef, $ae_error => $_[2]);
		888	});
		889	$_[0]->on_read (sub { });
		890	}
		891	}
		892	};
		893
		894	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
		895	};
		896
		897	my $connect_cb = sub {
191	$state{fh} = shift	898	$state{fh} = shift
		899	or do {
		900	my $err = "$!";
		901	%state = ();
192	or return $cb->(undef, { Status => 599, Reason => "$!" });	902	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });
		903	};
193		904
194	delete $state{connect_guard}; # reduce memory usage, save a tree	905	return unless delete $state{connect_guard};
195		906
196	# get handle	907	# get handle
197	$state{handle} = new AnyEvent::Handle	908	$state{handle} = new AnyEvent::Handle
198	fh => $state{fh},	909	fh => $state{fh},
199	($scheme eq "https" ? (tls => "connect") : ());	910	peername => $rhost,
		911	tls_ctx => $arg{tls_ctx},
		912	# these need to be reconfigured on keepalive handles
		913	timeout => $timeout,
		914	on_error => sub {
		915	%state = ();
		916	$cb->(undef, { @pseudo, Status => $ae_error, Reason => $_[2] });
		917	},
		918	on_eof => sub {
		919	%state = ();
		920	$cb->(undef, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" });
		921	},
		922	;
200		923
201	# limit the number of persistent connections	924	# limit the number of persistent connections
		925	# keepalive not yet supported
202	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	926	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
203	++$KA_COUNT{$_[1]};	927	# ++$KA_COUNT{$_[1]};
204	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	928	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		929	# --$KA_COUNT{$_[1]}
		930	# };
205	$hdr{connection} = "keep-alive";	931	# $hdr{connection} = "keep-alive";
206	delete $hdr{connection}; # keep-alive not yet supported
207	} else {
208	delete $hdr{connection};
209	}	932	# }
210		933
211	# (re-)configure handle	934	$state{handle}->starttls ("connect") if $rscheme eq "https";
212	$state{handle}->timeout ($timeout);
213	$state{handle}->on_error (sub {
214	%state = ();
215	$cb->(undef, { Status => 599, Reason => "$!" });
216	});
217	$state{handle}->on_eof (sub {
218	%state = ();
219	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
220	});
221		935
222	# send request	936	# now handle proxy-CONNECT method
223	$state{handle}->push_write (	937	if ($proxy && $uscheme eq "https") {
224	"$method $path HTTP/1.0\015\012"	938	# oh dear, we have to wrap it into a connect request
225	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
226	. "\015\012"
227	. (delete $state{body})
228	);
229		939
230	%hdr = (); # reduce memory usage, save a kitten	940	# maybe re-use $uauthority with patched port?
231		941	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");
232	# status line
233	$state{handle}->push_read (line => qr/\015?\012/, sub {	942	$state{handle}->push_read (line => $qr_nlnl, sub {
234	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix	943	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
235	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));	944	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
236		945
237	my %hdr = ( # response headers	946	if ($2 == 200) {
238	HTTPVersion => ",$1",	947	$rpath = $upath;
239	Status => ",$2",	948	$handle_actual_request->();
240	Reason => ",$3",
241	);
242
243	# headers, could be optimized a bit
244	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
245	for ("$_[1]\012") {
246	# we support spaces in field names, as lotus domino
247	# creates them.
248	$hdr{lc $1} .= ",$2"
249	while /\G
250	([^:\000-\037]+):
251	[\011\040]*
252	((?: [^\015\012]+ \| \015?\012[\011\040] )*)
253	\015?\012
254	/gxc;
255
256	/\G$/
257	or return $cb->(undef, { Status => 599, Reason => "garbled response headers" });
258	}	949	} else {
259
260	substr $_, 0, 1, ""
261	for values %hdr;
262
263	if ($method eq "HEAD") {
264	%state = ();	950	%state = ();
265	$cb->(undef, \%hdr);	951	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
266	} else {
267	if (exists $hdr{"content-length"}) {
268	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
269	# could cache persistent connection now
270	if ($hdr{connection} =~ /\bkeep-alive\b/i) {
271	# but we don't, due to misdesigns, this is annoyingly complex
272	};
273
274	%state = ();
275	$cb->($_[1], \%hdr);
276	});
277	} else {
278	# too bad, need to read until we get an error or EOF,
279	# no way to detect winged data.
280	$_[0]->on_error (sub {
281	%state = ();
282	$cb->($_[0]{rbuf}, \%hdr);
283	});
284	$_[0]->on_eof (undef);
285	$_[0]->on_read (sub { });
286	}
287	}	952	}
288	});	953	});
		954	} else {
		955	$handle_actual_request->();
289	});	956	}
290	}, sub {	957	};
291	$timeout	958
		959	_get_slot $uhost, sub {
		960	$state{slot_guard} = shift;
		961
		962	return unless $state{connect_guard};
		963
		964	my $tcp_connect = $arg{tcp_connect}
		965	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		966
		967	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
292	};	968	};
293		969
294	defined wantarray && AnyEvent::Util::guard { %state = () }	970	defined wantarray && AnyEvent::Util::guard { %state = () }
295	}	971	}
296		972
297	sub http_get($$;@) {	973	sub http_get($@) {
298	unshift @_, "GET";	974	unshift @_, "GET";
299	&http_request	975	&http_request
300	}	976	}
301		977
302	sub http_head($$;@) {	978	sub http_head($@) {
303	unshift @_, "HEAD";	979	unshift @_, "HEAD";
304	&http_request	980	&http_request
305	}	981	}
306		982
307	sub http_post($$$;@) {	983	sub http_post($$@) {
		984	my $url = shift;
308	unshift @_, "POST", "body";	985	unshift @_, "POST", $url, "body";
309	&http_request	986	&http_request
310	}	987	}
311		988
		989	=back
		990
		991	=head2 DNS CACHING
		992
		993	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		994	the actual connection, which in turn uses AnyEvent::DNS to resolve
		995	hostnames. The latter is a simple stub resolver and does no caching
		996	on its own. If you want DNS caching, you currently have to provide
		997	your own default resolver (by storing a suitable resolver object in
		998	C<$AnyEvent::DNS::RESOLVER>).
		999
312	=head2 GLOBAL FUNCTIONS AND VARIABLES	1000	=head2 GLOBAL FUNCTIONS AND VARIABLES
313		1001
314	=over 4	1002	=over 4
315		1003
316	=item AnyEvent::HTTP::set_proxy "proxy-url"	1004	=item AnyEvent::HTTP::set_proxy "proxy-url"
317		1005
318	Sets the default proxy server to use. The proxy-url must begin with a	1006	Sets the default proxy server to use. The proxy-url must begin with a
319	string of the form C<http://host:port> (optionally C<https:...>).	1007	string of the form C<http://host:port> (optionally C<https:...>), croaks
		1008	otherwise.
		1009
		1010	To clear an already-set proxy, use C<undef>.
		1011
		1012	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
		1013
		1014	Remove all cookies from the cookie jar that have been expired. If
		1015	C<$session_end> is given and true, then additionally remove all session
		1016	cookies.
		1017
		1018	You should call this function (with a true C<$session_end>) before you
		1019	save cookies to disk, and you should call this function after loading them
		1020	again. If you have a long-running program you can additonally call this
		1021	function from time to time.
		1022
		1023	A cookie jar is initially an empty hash-reference that is managed by this
		1024	module. It's format is subject to change, but currently it is like this:
		1025
		1026	The key C<version> has to contain C<1>, otherwise the hash gets
		1027	emptied. All other keys are hostnames or IP addresses pointing to
		1028	hash-references. The key for these inner hash references is the
		1029	server path for which this cookie is meant, and the values are again
		1030	hash-references. The keys of those hash-references is the cookie name, and
		1031	the value, you guessed it, is another hash-reference, this time with the
		1032	key-value pairs from the cookie, except for C<expires> and C<max-age>,
		1033	which have been replaced by a C<_expires> key that contains the cookie
		1034	expiry timestamp.
		1035
		1036	Here is an example of a cookie jar with a single cookie, so you have a
		1037	chance of understanding the above paragraph:
		1038
		1039	{
		1040	version => 1,
		1041	"10.0.0.1" => {
		1042	"/" => {
		1043	"mythweb_id" => {
		1044	_expires => 1293917923,
		1045	value => "ooRung9dThee3ooyXooM1Ohm",
		1046	},
		1047	},
		1048	},
		1049	}
		1050
		1051	=item $date = AnyEvent::HTTP::format_date $timestamp
		1052
		1053	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		1054	Date (RFC 2616).
		1055
		1056	=item $timestamp = AnyEvent::HTTP::parse_date $date
		1057
		1058	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
		1059	bunch of minor variations of those, and returns the corresponding POSIX
		1060	timestamp, or C<undef> if the date cannot be parsed.
320		1061
321	=item $AnyEvent::HTTP::MAX_RECURSE	1062	=item $AnyEvent::HTTP::MAX_RECURSE
322		1063
323	The default value for the C<recurse> request parameter (default: C<10>).	1064	The default value for the C<recurse> request parameter (default: C<10>).
324		1065
325	=item $AnyEvent::HTTP::USERAGENT	1066	=item $AnyEvent::HTTP::USERAGENT
326		1067
327	The default value for the C<User-Agent> header (the default is	1068	The default value for the C<User-Agent> header (the default is
328	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1069	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
329		1070
330	=item $AnyEvent::HTTP::MAX_PERSISTENT	1071	=item $AnyEvent::HTTP::MAX_PER_HOST
331		1072
332	The maximum number of persistent connections to keep open (default: 8).	1073	The maximum number of concurrent connections to the same host (identified
		1074	by the hostname). If the limit is exceeded, then the additional requests
		1075	are queued until previous connections are closed.
333		1076
334	Not implemented currently.	1077	The default value for this is C<4>, and it is highly advisable to not
		1078	increase it.
335		1079
336	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	1080	=item $AnyEvent::HTTP::ACTIVE
337		1081
338	The maximum time to cache a persistent connection, in seconds (default: 2).	1082	The number of active connections. This is not the number of currently
339		1083	running requests, but the number of currently open and non-idle TCP
340	Not implemented currently.	1084	connections. This number of can be useful for load-leveling.
341		1085
342	=back	1086	=back
343		1087
344	=cut	1088	=cut
345		1089
		1090	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		1091	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		1092
		1093	sub format_date($) {
		1094	my ($time) = @_;
		1095
		1096	# RFC 822/1123 format
		1097	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		1098
		1099	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		1100	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		1101	$H, $M, $S;
		1102	}
		1103
		1104	sub parse_date($) {
		1105	my ($date) = @_;
		1106
		1107	my ($d, $m, $y, $H, $M, $S);
		1108
		1109	if ($date =~ /^[A-Z][a-z][a-z]+, ([0-9][0-9]?)[\- ]([A-Z][a-z][a-z])[\- ]([0-9][0-9][0-9][0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) GMT$/) {
		1110	# RFC 822/1123, required by RFC 2616 (with " ")
		1111	# cookie dates (with "-")
		1112
		1113	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		1114
		1115	} elsif ($date =~ /^[A-Z][a-z][a-z]+, ([0-9][0-9]?)-([A-Z][a-z][a-z])-([0-9][0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) GMT$/) {
		1116	# RFC 850
		1117	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		1118
		1119	} elsif ($date =~ /^[A-Z][a-z][a-z]+ ([A-Z][a-z][a-z]) ([0-9 ]?[0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) ([0-9][0-9][0-9][0-9])$/) {
		1120	# ISO C's asctime
		1121	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		1122	}
		1123	# other formats fail in the loop below
		1124
		1125	for (0..11) {
		1126	if ($m eq $month[$_]) {
		1127	require Time::Local;
		1128	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		1129	}
		1130	}
		1131
		1132	undef
		1133	}
		1134
346	sub set_proxy($) {	1135	sub set_proxy($) {
		1136	if (length $_[0]) {
347	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	1137	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		1138	or Carp::croak "$_[0]: invalid proxy URL";
		1139	$PROXY = [$2, $3 \|\| 3128, $1]
		1140	} else {
		1141	undef $PROXY;
		1142	}
348	}	1143	}
349		1144
350	# initialise proxy from environment	1145	# initialise proxy from environment
		1146	eval {
351	set_proxy $ENV{http_proxy};	1147	set_proxy $ENV{http_proxy};
		1148	};
		1149
		1150	=head2 SOCKS PROXIES
		1151
		1152	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		1153	compile your perl to support socks, or use an external program such as
		1154	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		1155	transparently.
		1156
		1157	Alternatively, for AnyEvent::HTTP only, you can use your own
		1158	C<tcp_connect> function that does the proxy handshake - here is an example
		1159	that works with socks4a proxies:
		1160
		1161	use Errno;
		1162	use AnyEvent::Util;
		1163	use AnyEvent::Socket;
		1164	use AnyEvent::Handle;
		1165
		1166	# host, port and username of/for your socks4a proxy
		1167	my $socks_host = "10.0.0.23";
		1168	my $socks_port = 9050;
		1169	my $socks_user = "";
		1170
		1171	sub socks4a_connect {
		1172	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		1173
		1174	my $hdl = new AnyEvent::Handle
		1175	connect => [$socks_host, $socks_port],
		1176	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1177	on_error => sub { $connect_cb->() },
		1178	;
		1179
		1180	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1181
		1182	$hdl->push_read (chunk => 8, sub {
		1183	my ($hdl, $chunk) = @_;
		1184	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1185
		1186	if ($status == 0x5a) {
		1187	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1188	} else {
		1189	$! = Errno::ENXIO; $connect_cb->();
		1190	}
		1191	});
		1192
		1193	$hdl
		1194	}
		1195
		1196	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1197	possibly after switching off other proxy types:
		1198
		1199	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1200
		1201	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1202	my ($data, $headers) = @_;
		1203	...
		1204	};
352		1205
353	=head1 SEE ALSO	1206	=head1 SEE ALSO
354		1207
355	L<AnyEvent>.	1208	L<AnyEvent>.
356		1209
357	=head1 AUTHOR	1210	=head1 AUTHOR
358		1211
359	Marc Lehmann <schmorp@schmorp.de>	1212	Marc Lehmann <schmorp@schmorp.de>
360	http://home.schmorp.de/	1213	http://home.schmorp.de/
		1214
		1215	With many thanks to Дмитрий Шалашов, who provided countless
		1216	testcases and bugreports.
361		1217
362	=cut	1218	=cut
363		1219
364	1	1220	1
365		1221

Diff Legend

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

Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.6 by root, Wed Jun 4 12:05:45 2008 UTC vs. Revision 1.89 by root, Mon Jan 3 00:23:25 2011 UTC

Diff Legend

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.6 by root, Wed Jun 4 12:05:45 2008 UTC vs.
Revision 1.89 by root, Mon Jan 3 00:23:25 2011 UTC