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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.5 by root, Wed Jun 4 12:03:47 2008 UTC vs.
Revision 1.79 by root, Sat Jan 1 20:01:07 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
…		…
20	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
21		40
22	use strict;	41	use strict;
23	no warnings;	42	no warnings;
24		43
25	use Carp;	44	use Errno ();
26		45
27	use AnyEvent ();	46	use AnyEvent 5.0 ();
28	use AnyEvent::Util ();	47	use AnyEvent::Util ();
29	use AnyEvent::Socket ();
30	use AnyEvent::Handle ();	48	use AnyEvent::Handle ();
31		49
32	use base Exporter::;	50	use base Exporter::;
33		51
34	our $VERSION = '1.0';	52	our $VERSION = '1.5';
35		53
36	our @EXPORT = qw(http_get http_request);	54	our @EXPORT = qw(http_get http_post http_head http_request);
37		55
38	our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	56	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
39	our $MAX_RECURSE = 10;	57	our $MAX_RECURSE = 10;
40	our $MAX_PERSISTENT = 8;	58	our $MAX_PERSISTENT = 8;
41	our $PERSISTENT_TIMEOUT = 2;	59	our $PERSISTENT_TIMEOUT = 2;
42	our $TIMEOUT = 300;	60	our $TIMEOUT = 300;
43		61
44	# changing these is evil	62	# changing these is evil
45	our $MAX_PERSISTENT_PER_HOST = 2;	63	our $MAX_PERSISTENT_PER_HOST = 0;
46	our $MAX_PER_HOST = 4; # not respected yet :(	64	our $MAX_PER_HOST = 4;
47		65
48	our $PROXY;	66	our $PROXY;
		67	our $ACTIVE = 0;
49		68
50	my %KA_COUNT; # number of open keep-alive connections per host	69	my %KA_COUNT; # number of open keep-alive connections per host
		70	my %CO_SLOT; # number of open connections, and wait queue, per host
51		71
52	=item http_get $url, key => value..., $cb->($data, $headers)	72	=item http_get $url, key => value..., $cb->($data, $headers)
53		73
54	Executes an HTTP-GET request. See the http_request function for details on	74	Executes an HTTP-GET request. See the http_request function for details on
55	additional parameters.	75	additional parameters and the return value.
56		76
57	=item http_head $url, key => value..., $cb->($data, $headers)	77	=item http_head $url, key => value..., $cb->($data, $headers)
58		78
59	Executes an HTTP-HEAD request. See the http_request function for details on	79	Executes an HTTP-HEAD request. See the http_request function for details
60	additional parameters.	80	on additional parameters and the return value.
61		81
62	=item http_post $url, $body, key => value..., $cb->($data, $headers)	82	=item http_post $url, $body, key => value..., $cb->($data, $headers)
63		83
64	Executes an HTTP-POST request with a requets body of C<$bod>. See the	84	Executes an HTTP-POST request with a request body of C<$body>. See the
65	http_request function for details on additional parameters.	85	http_request function for details on additional parameters and the return
		86	value.
66		87
67	=item http_request $method => $url, key => value..., $cb->($data, $headers)	88	=item http_request $method => $url, key => value..., $cb->($data, $headers)
68		89
69	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL	90	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.	91	must be an absolute http or https URL.
71		92
		93	When called in void context, nothing is returned. In other contexts,
		94	C<http_request> returns a "cancellation guard" - you have to keep the
		95	object at least alive until the callback get called. If the object gets
		96	destroyed before the callback is called, the request will be cancelled.
		97
72	The callback will be called with the response data as first argument	98	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	99	(or C<undef> if an error occured), and a hash-ref with response headers
74	response headers as second argument.	100	(and trailers) as second argument.
75		101
76	All the headers in that has are lowercased. In addition to the response	102	All the headers in that hash are lowercased. In addition to the response
77	headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and	103	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	104	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
79	name.	105	three parts of the HTTP Status-Line of the same name. If an error occurs
		106	during the body phase of a request, then the original C<Status> and
		107	C<Reason> values from the header are available as C<OrigStatus> and
		108	C<OrigReason>.
		109
		110	The pseudo-header C<URL> contains the actual URL (which can differ from
		111	the requested URL when following redirects - for example, you might get
		112	an error that your URL scheme is not supported even though your URL is a
		113	valid http URL because it redirected to an ftp URL, in which case you can
		114	look at the URL pseudo header).
		115
		116	The pseudo-header C<Redirect> only exists when the request was a result
		117	of an internal redirect. In that case it is an array reference with
		118	the C<($data, $headers)> from the redirect response. Note that this
		119	response could in turn be the result of a redirect itself, and C<<
		120	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		121	response, and so on.
		122
		123	If the server sends a header multiple times, then their contents will be
		124	joined together with a comma (C<,>), as per the HTTP spec.
80		125
81	If an internal error occurs, such as not being able to resolve a hostname,	126	If an internal error occurs, such as not being able to resolve a hostname,
82	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	127	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be
83	and the C<Reason> pseudo-header will contain an error message.	128	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
		129	message. Currently the following status codes are used:
		130
		131	=over 4
		132
		133	=item 595 - errors during connection etsbalishment, proxy handshake.
		134
		135	=item 596 - errors during TLS negotiation, request sending and header processing.
		136
		137	=item 597 - errors during body receiving or processing.
		138
		139	=item 598 - user aborted request via C<on_header> or C<on_body>.
		140
		141	=item 599 - other, usually nonretryable, errors (garbled URL etc.).
		142
		143	=back
		144
		145	A typical callback might look like this:
		146
		147	sub {
		148	my ($body, $hdr) = @_;
		149
		150	if ($hdr->{Status} =~ /^2/) {
		151	... everything should be ok
		152	} else {
		153	print "error, $hdr->{Status} $hdr->{Reason}\n";
		154	}
		155	}
84		156
85	Additional parameters are key-value pairs, and are fully optional. They	157	Additional parameters are key-value pairs, and are fully optional. They
86	include:	158	include:
87		159
88	=over 4	160	=over 4
…		…
92	Whether to recurse requests or not, e.g. on redirects, authentication	164	Whether to recurse requests or not, e.g. on redirects, authentication
93	retries and so on, and how often to do so.	165	retries and so on, and how often to do so.
94		166
95	=item headers => hashref	167	=item headers => hashref
96		168
97	The request headers to use.	169	The request headers to use. Currently, C<http_request> may provide its own
		170	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
		171	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>
		172	(this can be suppressed by using C<undef> for these headers in which case
		173	they won't be sent at all).
98		174
99	=item timeout => $seconds	175	=item timeout => $seconds
100		176
101	The time-out to use for various stages - each connect attempt will reset	177	The time-out to use for various stages - each connect attempt will reset
102	the timeout, as will read or write activity. Default timeout is 5 minutes.	178	the timeout, as will read or write activity, i.e. this is not an overall
		179	timeout.
		180
		181	Default timeout is 5 minutes.
103		182
104	=item proxy => [$host, $port[, $scheme]] or undef	183	=item proxy => [$host, $port[, $scheme]] or undef
105		184
106	Use the given http proxy for all requests. If not specified, then the	185	Use the given http proxy for all requests. If not specified, then the
107	default proxy (as specified by C<$ENV{http_proxy}>) is used.	186	default proxy (as specified by C<$ENV{http_proxy}>) is used.
108		187
109	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	188	C<$scheme> must be either missing, C<http> for HTTP or C<https> for
110	HTTPS.	189	HTTPS.
111		190
112	=item body => $string	191	=item body => $string
113		192
114	The request body, usually empty. Will be-sent as-is (future versions of	193	The request body, usually empty. Will be sent as-is (future versions of
115	this module might offer more options).	194	this module might offer more options).
116		195
		196	=item cookie_jar => $hash_ref
		197
		198	Passing this parameter enables (simplified) cookie-processing, loosely
		199	based on the original netscape specification.
		200
		201	The C<$hash_ref> must be an (initially empty) hash reference which will
		202	get updated automatically. It is possible to save the cookie jar to
		203	persistent storage with something like JSON or Storable, but this is not
		204	recommended, as session-only cookies might survive longer than expected.
		205
		206	Note that this cookie implementation is not meant to be complete. If
		207	you want complete cookie management you have to do that on your
		208	own. C<cookie_jar> is meant as a quick fix to get some cookie-using sites
		209	working. Cookies are a privacy disaster, do not use them unless required
		210	to.
		211
		212	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
		213	headers will be set and handled by this module, otherwise they will be
		214	left untouched.
		215
		216	=item tls_ctx => $scheme \| $tls_ctx
		217
		218	Specifies the AnyEvent::TLS context to be used for https connections. This
		219	parameter follows the same rules as the C<tls_ctx> parameter to
		220	L<AnyEvent::Handle>, but additionally, the two strings C<low> or
		221	C<high> can be specified, which give you a predefined low-security (no
		222	verification, highest compatibility) and high-security (CA and common-name
		223	verification) TLS context.
		224
		225	The default for this option is C<low>, which could be interpreted as "give
		226	me the page, no matter what".
		227
		228	=item on_prepare => $callback->($fh)
		229
		230	In rare cases you need to "tune" the socket before it is used to
		231	connect (for exmaple, to bind it on a given IP address). This parameter
		232	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		233	and behaves exactly the same way (e.g. it has to provide a
		234	timeout). See the description for the C<$prepare_cb> argument of
		235	C<AnyEvent::Socket::tcp_connect> for details.
		236
		237	=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
		238
		239	In even rarer cases you want total control over how AnyEvent::HTTP
		240	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
		241	to do this, but you can provide your own C<tcp_connect> function -
		242	obviously, it has to follow the same calling conventions, except that it
		243	may always return a connection guard object.
		244
		245	There are probably lots of weird uses for this function, starting from
		246	tracing the hosts C<http_request> actually tries to connect, to (inexact
		247	but fast) host => IP address caching or even socks protocol support.
		248
		249	=item on_header => $callback->($headers)
		250
		251	When specified, this callback will be called with the header hash as soon
		252	as headers have been successfully received from the remote server (not on
		253	locally-generated errors).
		254
		255	It has to return either true (in which case AnyEvent::HTTP will continue),
		256	or false, in which case AnyEvent::HTTP will cancel the download (and call
		257	the finish callback with an error code of C<598>).
		258
		259	This callback is useful, among other things, to quickly reject unwanted
		260	content, which, if it is supposed to be rare, can be faster than first
		261	doing a C<HEAD> request.
		262
		263	The downside is that cancelling the request makes it impossible to re-use
		264	the connection. Also, the C<on_header> callback will not receive any
		265	trailer (headers sent after the response body).
		266
		267	Example: cancel the request unless the content-type is "text/html".
		268
		269	on_header => sub {
		270	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		271	},
		272
		273	=item on_body => $callback->($partial_body, $headers)
		274
		275	When specified, all body data will be passed to this callback instead of
		276	to the completion callback. The completion callback will get the empty
		277	string instead of the body data.
		278
		279	It has to return either true (in which case AnyEvent::HTTP will continue),
		280	or false, in which case AnyEvent::HTTP will cancel the download (and call
		281	the completion callback with an error code of C<598>).
		282
		283	The downside to cancelling the request is that it makes it impossible to
		284	re-use the connection.
		285
		286	This callback is useful when the data is too large to be held in memory
		287	(so the callback writes it to a file) or when only some information should
		288	be extracted, or when the body should be processed incrementally.
		289
		290	It is usually preferred over doing your own body handling via
		291	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		292	only used to create a connection, C<want_body_handle> is the better
		293	alternative, as it allows you to install your own event handler, reducing
		294	resource usage.
		295
		296	=item want_body_handle => $enable
		297
		298	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		299	changes considerably: after parsing the headers, and instead of
		300	downloading the body (if any), the completion callback will be
		301	called. Instead of the C<$body> argument containing the body data, the
		302	callback will receive the L<AnyEvent::Handle> object associated with the
		303	connection. In error cases, C<undef> will be passed. When there is no body
		304	(e.g. status C<304>), the empty string will be passed.
		305
		306	The handle object might or might not be in TLS mode, might be connected to
		307	a proxy, be a persistent connection etc., and configured in unspecified
		308	ways. The user is responsible for this handle (it will not be used by this
		309	module anymore).
		310
		311	This is useful with some push-type services, where, after the initial
		312	headers, an interactive protocol is used (typical example would be the
		313	push-style twitter API which starts a JSON/XML stream).
		314
		315	If you think you need this, first have a look at C<on_body>, to see if
		316	that doesn't solve your problem in a better way.
		317
117	=back	318	=back
118		319
119	=back	320	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		321	the response body.
		322
		323	http_request GET => "http://www.nethype.de/", sub {
		324	my ($body, $hdr) = @_;
		325	print "$body\n";
		326	};
		327
		328	Example: do a HTTP HEAD request on https://www.google.com/, use a
		329	timeout of 30 seconds.
		330
		331	http_request
		332	GET => "https://www.google.com",
		333	timeout => 30,
		334	sub {
		335	my ($body, $hdr) = @_;
		336	use Data::Dumper;
		337	print Dumper $hdr;
		338	}
		339	;
		340
		341	Example: do another simple HTTP GET request, but immediately try to
		342	cancel it.
		343
		344	my $request = http_request GET => "http://www.nethype.de/", sub {
		345	my ($body, $hdr) = @_;
		346	print "$body\n";
		347	};
		348
		349	undef $request;
120		350
121	=cut	351	=cut
122		352
		353	sub _slot_schedule;
		354	sub _slot_schedule($) {
		355	my $host = shift;
		356
		357	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
		358	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
		359	# somebody wants that slot
		360	++$CO_SLOT{$host}[0];
		361	++$ACTIVE;
		362
		363	$cb->(AnyEvent::Util::guard {
		364	--$ACTIVE;
		365	--$CO_SLOT{$host}[0];
		366	_slot_schedule $host;
		367	});
		368	} else {
		369	# nobody wants the slot, maybe we can forget about it
		370	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
		371	last;
		372	}
		373	}
		374	}
		375
		376	# wait for a free slot on host, call callback
		377	sub _get_slot($$) {
		378	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
		379
		380	_slot_schedule $_[0];
		381	}
		382
		383	# extract cookies from jar
		384	sub cookie_jar_extract($$$$) {
		385	my ($jar, $uscheme, $uhost, $upath) = @_;
		386
		387	%$jar = () if $jar->{version} != 1;
		388
		389	my @cookies;
		390
		391	while (my ($chost, $paths) = each %$jar) {
		392	next unless ref $paths;
		393
		394	if ($chost =~ /^\./) {
		395	next unless $chost eq substr $uhost, -length $chost;
		396	} elsif ($chost =~ /\./) {
		397	next unless $chost eq $uhost;
		398	} else {
		399	next;
		400	}
		401
		402	while (my ($cpath, $cookies) = each %$paths) {
		403	next unless $cpath eq substr $upath, 0, length $cpath;
		404
		405	while (my ($cookie, $kv) = each %$cookies) {
		406	next if $uscheme ne "https" && exists $kv->{secure};
		407
		408	if (exists $kv->{expires}) {
		409	if (AE::now > parse_date ($kv->{expires})) {
		410	delete $cookies->{$cookie};
		411	next;
		412	}
		413	}
		414
		415	my $value = $kv->{value};
		416
		417	if ($value =~ /[=;,[:space:]]/) {
		418	$value =~ s/([\\"])/\\$1/g;
		419	$value = "\"$value\"";
		420	}
		421
		422	push @cookies, "$cookie=$value";
		423	}
		424	}
		425	}
		426
		427	\@cookies
		428	}
		429
		430	# parse set_cookie header into jar
		431	sub cookie_jar_set_cookie($$$) {
		432	my ($jar, $set_cookie, $uhost) = @_;
		433
		434	for ($set_cookie) {
		435	# parse NAME=VALUE
		436	my @kv;
		437
		438	# expires is not http-compliant in the original cookie-spec,
		439	# we support the official date format and some extensions
		440	while (
		441	m{
		442	\G\s*
		443	(?:
		444	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
		445	\| ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )
		446	)
		447	}gcxsi
		448	) {
		449	my $name = $2;
		450	my $value = $4;
		451
		452	unless (defined $name) {
		453	# expires
		454	$name = "expires";
		455	$value = $1;
		456	} elsif (!defined $value) {
		457	# quoted
		458	$value = $3;
		459	$value =~ s/\\(.)/$1/gs;
		460	}
		461
		462	push @kv, lc $name, $value;
		463
		464	last unless /\G\s*;/gc;
		465	}
		466
		467	last unless @kv;
		468
		469	my $name = shift @kv;
		470	my %kv = (value => shift @kv, @kv);
		471
		472	$kv{expires} \|\|= format_date (AE::now + $kv{"max-age"})
		473	if exists $kv{"max-age"};
		474
		475	my $cdom;
		476	my $cpath = (delete $kv{path}) \|\| "/";
		477
		478	if (exists $kv{domain}) {
		479	$cdom = delete $kv{domain};
		480
		481	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		482
		483	next if $cdom =~ /\.$/;
		484
		485	# this is not rfc-like and not netscape-like. go figure.
		486	my $ndots = $cdom =~ y/.//;
		487	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		488	} else {
		489	$cdom = $uhost;
		490	}
		491
		492	# store it
		493	$jar->{version} = 1;
		494	$jar->{$cdom}{$cpath}{$name} = \%kv;
		495
		496	redo if /\G\s*,/gc;
		497	}
		498	}
		499
		500	# continue to parse $_ for headers and place them into the arg
		501	sub parse_hdr() {
		502	my %hdr;
		503
		504	# things seen, not parsed:
		505	# p3pP="NON CUR OTPi OUR NOR UNI"
		506
		507	$hdr{lc $1} .= ",$2"
		508	while /\G
		509	([^:\000-\037]*):
		510	[\011\040]*
		511	((?: [^\012]+ \| \012[\011\040] )*)
		512	\012
		513	/gxc;
		514
		515	/\G$/
		516	or return;
		517
		518	# remove the "," prefix we added to all headers above
		519	substr $_, 0, 1, ""
		520	for values %hdr;
		521
		522	\%hdr
		523	}
		524
		525	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		526
		527	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		528	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		529
123	sub http_request($$$;@) {	530	sub http_request($$@) {
124	my $cb = pop;	531	my $cb = pop;
125	my ($method, $url, %arg) = @_;	532	my ($method, $url, %arg) = @_;
126		533
127	my %hdr;	534	my %hdr;
128		535
		536	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		537	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
		538
129	$method = uc $method;	539	$method = uc $method;
130		540
131	if (my $hdr = delete $arg{headers}) {	541	if (my $hdr = $arg{headers}) {
132	while (my ($k, $v) = each %$hdr) {	542	while (my ($k, $v) = each %$hdr) {
133	$hdr{lc $k} = $v;	543	$hdr{lc $k} = $v;
134	}	544	}
135	}	545	}
136		546
		547	# pseudo headers for all subsequent responses
		548	my @pseudo = (URL => $url);
		549	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		550
		551	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
		552
		553	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
		554	if $recurse < 0;
		555
137	my $proxy = $arg{proxy} \|\| $PROXY;	556	my $proxy = $arg{proxy} \|\| $PROXY;
138	my $timeout = $arg{timeout} \|\| $TIMEOUT;	557	my $timeout = $arg{timeout} \|\| $TIMEOUT;
139	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;
140		558
141	$hdr{"user-agent"} \|\|= $USERAGENT;	559	my ($uscheme, $uauthority, $upath, $query, $fragment) =
		560	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
142		561
143	my ($host, $port, $path, $scheme);	562	$uscheme = lc $uscheme;
		563
		564	my $uport = $uscheme eq "http" ? 80
		565	: $uscheme eq "https" ? 443
		566	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
		567
		568	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
		569	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
		570
		571	my $uhost = $1;
		572	$uport = $2 if defined $2;
		573
		574	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		575	unless exists $hdr{host};
		576
		577	$uhost =~ s/^\[(.*)\]$/$1/;
		578	$upath .= $query if length $query;
		579
		580	$upath =~ s%^/?%/%;
		581
		582	# cookie processing
		583	if (my $jar = $arg{cookie_jar}) {
		584	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
		585
		586	$hdr{cookie} = join "; ", @$cookies
		587	if @$cookies;
		588	}
		589
		590	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
144		591
145	if ($proxy) {	592	if ($proxy) {
146	($host, $port, $scheme) = @$proxy;	593	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
147	$path = $url;	594
		595	$rscheme = "http" unless defined $rscheme;
		596
		597	# don't support https requests over https-proxy transport,
		598	# can't be done with tls as spec'ed, unless you double-encrypt.
		599	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
148	} else {	600	} else {
149	($scheme, my $authority, $path, my $query, my $fragment) =	601	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
150	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;
151
152	$port = $scheme eq "http" ? 80
153	: $scheme eq "https" ? 443
154	: croak "$url: only http and https URLs supported";
155
156	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
157	or croak "$authority: unparsable URL";
158
159	$host = $1;
160	$port = $2 if defined $2;
161
162	$host =~ s/^\[(.*)\]$/$1/;
163	$path .= "?$query" if length $query;
164
165	$path = "/" unless $path;
166
167	$hdr{host} = $host = lc $host;
168	}	602	}
169		603
170	$scheme = lc $scheme;	604	# leave out fragment and query string, just a heuristic
		605	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		606	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
171		607
172	my %state;
173
174	$state{body} = delete $arg{body};
175
176	$hdr{"content-length"} = length $state{body};	608	$hdr{"content-length"} = length $arg{body}
		609	if length $arg{body} \|\| $method ne "GET";
177		610
178	$state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub {	611	$hdr{connection} = "close TE"; #1.1
		612	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
		613
		614	my %state = (connect_guard => 1);
		615
		616	_get_slot $uhost, sub {
		617	$state{slot_guard} = shift;
		618
		619	return unless $state{connect_guard};
		620
		621	my $ae_error = 595; # connecting
		622
		623	my $connect_cb = sub {
179	$state{fh} = shift	624	$state{fh} = shift
180	or return $cb->(undef, { Status => 599, Reason => "$!" });
181
182	delete $state{connect_guard}; # reduce memory usage, save a tree
183
184	# get handle
185	$state{handle} = new AnyEvent::Handle
186	fh => $state{fh},
187	($scheme eq "https" ? (tls => "connect") : ());
188
189	# limit the number of persistent connections
190	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
191	++$KA_COUNT{$_[1]};
192	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };
193	$hdr{connection} = "keep-alive";
194	delete $hdr{connection}; # keep-alive not yet supported
195	} else {
196	delete $hdr{connection};
197	}
198
199	# (re-)configure handle
200	$state{handle}->timeout ($timeout);
201	$state{handle}->on_error (sub {
202	%state = ();
203	$cb->(undef, { Status => 599, Reason => "$!" });
204	});
205	$state{handle}->on_eof (sub {
206	%state = ();
207	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
208	});
209
210	# send request
211	$state{handle}->push_write (
212	"$method $path HTTP/1.0\015\012"
213	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
214	. "\015\012"
215	. (delete $state{body})
216	);
217
218	%hdr = (); # reduce memory usage, save a kitten
219
220	# status line
221	$state{handle}->push_read (line => qr/\015?\012/, sub {
222	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
223	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
224
225	my %hdr = ( # response headers
226	HTTPVersion => ",$1",
227	Status => ",$2",
228	Reason => ",$3",
229	);
230
231	# headers, could be optimized a bit
232	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
233	for ("$_[1]\012") {
234	# we support spaces in field names, as lotus domino
235	# creates them.
236	$hdr{lc $1} .= ",$2"
237	while /\G
238	([^:\000-\037]+):
239	[\011\040]*
240	((?: [^\015\012]+ \| \015?\012[\011\040] )*)
241	\015?\012
242	/gxc;
243
244	/\G$/
245	or return $cb->(undef, { Status => 599, Reason => "garbled response headers" });
246	}	625	or do {
247		626	my $err = "$!";
248	substr $_, 0, 1, ""
249	for values %hdr;
250
251	if ($method eq "HEAD") {
252	%state = ();	627	%state = ();
		628	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });
		629	};
		630
		631	return unless delete $state{connect_guard};
		632
		633	# get handle
		634	$state{handle} = new AnyEvent::Handle
		635	fh => $state{fh},
		636	peername => $rhost,
		637	tls_ctx => $arg{tls_ctx},
		638	# these need to be reconfigured on keepalive handles
		639	timeout => $timeout,
		640	on_error => sub {
		641	%state = ();
		642	$cb->(undef, { @pseudo, Status => $ae_error, Reason => $_[2] });
		643	},
		644	on_eof => sub {
		645	%state = ();
		646	$cb->(undef, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" });
		647	},
		648	;
		649
		650	# limit the number of persistent connections
		651	# keepalive not yet supported
		652	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
		653	# ++$KA_COUNT{$_[1]};
		654	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		655	# --$KA_COUNT{$_[1]}
		656	# };
		657	# $hdr{connection} = "keep-alive";
		658	# }
		659
		660	$state{handle}->starttls ("connect") if $rscheme eq "https";
		661
		662	# handle actual, non-tunneled, request
		663	my $handle_actual_request = sub {
		664	$ae_error = 596; # request phase
		665
		666	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		667
		668	# send request
		669	$state{handle}->push_write (
		670	"$method $rpath HTTP/1.1\015\012"
		671	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		672	. "\015\012"
		673	. (delete $arg{body})
		674	);
		675
		676	# return if error occured during push_write()
		677	return unless %state;
		678
		679	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
		680
		681	# status line and headers
		682	$state{read_response} = sub {
		683	for ("$_[1]") {
		684	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		685
		686	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
		687	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
		688
		689	# 100 Continue handling
		690	# should not happen as we don't send expect: 100-continue,
		691	# but we handle it just in case.
		692	# since we send the request body regardless, if we get an error
		693	# we are out of-sync, which we currently do NOT handle correctly.
		694	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		695	if $2 eq 100;
		696
		697	push @pseudo,
		698	HTTPVersion => $1,
		699	Status => $2,
		700	Reason => $3,
		701	;
		702
		703	my $hdr = parse_hdr
		704	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
		705
		706	%hdr = (%$hdr, @pseudo);
		707	}
		708
		709	# redirect handling
		710	# microsoft and other shitheads don't give a shit for following standards,
		711	# try to support some common forms of broken Location headers.
		712	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		713	$hdr{location} =~ s/^\.\/+//;
		714
		715	my $url = "$rscheme://$uhost:$uport";
		716
		717	unless ($hdr{location} =~ s/^\///) {
		718	$url .= $upath;
		719	$url =~ s/\/[^\/]*$//;
		720	}
		721
		722	$hdr{location} = "$url/$hdr{location}";
		723	}
		724
		725	my $redirect;
		726
		727	if ($recurse) {
		728	my $status = $hdr{Status};
		729
		730	# industry standard is to redirect POST as GET for
		731	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		732	# also, the UA should ask the user for 301 and 307 and POST,
		733	# industry standard seems to be to simply follow.
		734	# we go with the industry standard.
		735	if ($status == 301 or $status == 302 or $status == 303) {
		736	# HTTP/1.1 is unclear on how to mutate the method
		737	$method = "GET" unless $method eq "HEAD";
		738	$redirect = 1;
		739	} elsif ($status == 307) {
		740	$redirect = 1;
		741	}
		742	}
		743
		744	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
		745	my $may_keep_alive = $_[3];
		746
		747	$state{handle}->destroy if $state{handle};
		748	%state = ();
		749
		750	if (defined $_[1]) {
		751	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		752	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		753	}
		754
		755	# set-cookie processing
		756	if ($arg{cookie_jar}) {
		757	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost;
		758	}
		759
		760	if ($redirect && exists $hdr{location}) {
		761	# we ignore any errors, as it is very common to receive
		762	# Content-Length != 0 but no actual body
		763	# we also access %hdr, as $_[1] might be an erro
		764	http_request (
		765	$method => $hdr{location},
		766	%arg,
		767	recurse => $recurse - 1,
		768	Redirect => [$_[0], \%hdr],
		769	$cb);
		770	} else {
253	$cb->(undef, \%hdr);	771	$cb->($_[0], \%hdr);
		772	}
		773	};
		774
		775	$ae_error = 597; # body phase
		776
		777	my $len = $hdr{"content-length"};
		778
		779	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		780	$finish->(undef, 598 => "Request cancelled by on_header");
		781	} elsif (
		782	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		783	or $method eq "HEAD"
		784	or (defined $len && !$len)
		785	) {
		786	# no body
		787	$finish->("", undef, undef, 1);
254	} else {	788	} else {
255	if (exists $hdr{"content-length"}) {	789	# body handling, many different code paths
		790	# - no body expected
		791	# - want_body_handle
		792	# - te chunked
		793	# - 2x length known (with or without on_body)
		794	# - 2x length not known (with or without on_body)
		795	if (!$redirect && $arg{want_body_handle}) {
		796	$_[0]->on_eof (undef);
		797	$_[0]->on_error (undef);
		798	$_[0]->on_read (undef);
		799
		800	$finish->(delete $state{handle});
		801
		802	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
		803	my $cl = 0;
		804	my $body = undef;
		805	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		806
		807	my $read_chunk; $read_chunk = sub {
		808	$_[1] =~ /^([0-9a-fA-F]+)/
		809	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		810
		811	my $len = hex $1;
		812
		813	if ($len) {
		814	$cl += $len;
		815
256	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	816	$_[0]->push_read (chunk => $len, sub {
257	# could cache persistent connection now	817	$on_body->($_[1], \%hdr)
258	if ($hdr{connection} =~ /\bkeep-alive\b/i) {	818	or return $finish->(undef, 598 => "Request cancelled by on_body");
259	# but we don't, due to misdesigns, this is annoyingly complex	819
		820	$_[0]->push_read (line => sub {
		821	length $_[1]
		822	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		823	$_[0]->push_read (line => $read_chunk);
		824	});
		825	});
		826	} else {
		827	$hdr{"content-length"} \|\|= $cl;
		828
		829	$_[0]->push_read (line => $qr_nlnl, sub {
		830	if (length $_[1]) {
		831	for ("$_[1]") {
		832	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		833
		834	my $hdr = parse_hdr
		835	or return $finish->(undef, $ae_error => "Garbled response trailers");
		836
		837	%hdr = (%hdr, %$hdr);
		838	}
		839	}
		840
		841	$finish->($body, undef, undef, 1);
		842	});
		843	}
260	};	844	};
261		845
		846	$_[0]->push_read (line => $read_chunk);
		847
		848	} elsif ($arg{on_body}) {
		849	if ($len) {
		850	$_[0]->on_read (sub {
		851	$len -= length $_[0]{rbuf};
		852
		853	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		854	or return $finish->(undef, 598 => "Request cancelled by on_body");
		855
		856	$len > 0
		857	or $finish->("", undef, undef, 1);
		858	});
262	%state = ();	859	} else {
263	$cb->($_[1], \%hdr);	860	$_[0]->on_eof (sub {
		861	$finish->("");
		862	});
		863	$_[0]->on_read (sub {
		864	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		865	or $finish->(undef, 598 => "Request cancelled by on_body");
		866	});
		867	}
		868	} else {
		869	$_[0]->on_eof (undef);
		870
		871	if ($len) {
		872	$_[0]->on_read (sub {
		873	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		874	if $len <= length $_[0]{rbuf};
		875	});
		876	} else {
		877	$_[0]->on_error (sub {
		878	($! == Errno::EPIPE \|\| !$!)
		879	? $finish->(delete $_[0]{rbuf})
		880	: $finish->(undef, $ae_error => $_[2]);
		881	});
		882	$_[0]->on_read (sub { });
		883	}
264	});	884	}
		885	}
		886	};
		887
		888	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
		889	};
		890
		891	# now handle proxy-CONNECT method
		892	if ($proxy && $uscheme eq "https") {
		893	# oh dear, we have to wrap it into a connect request
		894
		895	# maybe re-use $uauthority with patched port?
		896	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		897	$state{handle}->push_read (line => $qr_nlnl, sub {
		898	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		899	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
		900
		901	if ($2 == 200) {
		902	$rpath = $upath;
		903	&$handle_actual_request;
265	} else {	904	} else {
266	# too bad, need to read until we get an error or EOF,
267	# no way to detect winged data.
268	$_[0]->on_error (sub {
269	%state = ();	905	%state = ();
270	$cb->($_[0]{rbuf}, \%hdr);	906	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
271	});
272	$_[0]->on_eof (undef);
273	$_[0]->on_read (sub { });
274	}	907	}
275	}	908	});
		909	} else {
		910	&$handle_actual_request;
276	});	911	}
277	});	912	};
278	}, sub {	913
279	$timeout	914	my $tcp_connect = $arg{tcp_connect}
		915	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		916
		917	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		918
280	};	919	};
281		920
282	defined wantarray && AnyEvent::Util::guard { %state = () }	921	defined wantarray && AnyEvent::Util::guard { %state = () }
283	}	922	}
284		923
285	sub http_get($$;@) {	924	sub http_get($@) {
286	unshift @_, "GET";	925	unshift @_, "GET";
287	&http_request	926	&http_request
288	}	927	}
289		928
290	sub http_head($$;@) {	929	sub http_head($@) {
291	unshift @_, "HEAD";	930	unshift @_, "HEAD";
292	&http_request	931	&http_request
293	}	932	}
294		933
295	sub http_post($$$;@) {	934	sub http_post($$@) {
		935	my $url = shift;
296	unshift @_, "POST", "body";	936	unshift @_, "POST", $url, "body";
297	&http_request	937	&http_request
298	}	938	}
299		939
		940	=back
		941
		942	=head2 DNS CACHING
		943
		944	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		945	the actual connection, which in turn uses AnyEvent::DNS to resolve
		946	hostnames. The latter is a simple stub resolver and does no caching
		947	on its own. If you want DNS caching, you currently have to provide
		948	your own default resolver (by storing a suitable resolver object in
		949	C<$AnyEvent::DNS::RESOLVER>).
		950
300	=head2 GLOBAL FUNCTIONS AND VARIABLES	951	=head2 GLOBAL FUNCTIONS AND VARIABLES
301		952
302	=over 4	953	=over 4
303		954
304	=item AnyEvent::HTTP::set_proxy "proxy-url"	955	=item AnyEvent::HTTP::set_proxy "proxy-url"
305		956
306	Sets the default proxy server to use. The proxy-url must begin with a	957	Sets the default proxy server to use. The proxy-url must begin with a
307	string of the form C<http://host:port> (optionally C<https:...>).	958	string of the form C<http://host:port> (optionally C<https:...>), croaks
		959	otherwise.
		960
		961	To clear an already-set proxy, use C<undef>.
		962
		963	=item $date = AnyEvent::HTTP::format_date $timestamp
		964
		965	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		966	Date (RFC 2616).
		967
		968	=item $timestamp = AnyEvent::HTTP::parse_date $date
		969
		970	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
		971	bunch of minor variations of those, and returns the corresponding POSIX
		972	timestamp, or C<undef> if the date cannot be parsed.
308		973
309	=item $AnyEvent::HTTP::MAX_RECURSE	974	=item $AnyEvent::HTTP::MAX_RECURSE
310		975
311	The default value for the C<recurse> request parameter (default: C<10>).	976	The default value for the C<recurse> request parameter (default: C<10>).
312		977
313	=item $AnyEvent::HTTP::USERAGENT	978	=item $AnyEvent::HTTP::USERAGENT
314		979
315	The default value for the C<User-Agent> header (the default is	980	The default value for the C<User-Agent> header (the default is
316	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	981	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
317		982
318	=item $AnyEvent::HTTP::MAX_PERSISTENT	983	=item $AnyEvent::HTTP::MAX_PER_HOST
319		984
320	The maximum number of persistent connections to keep open (default: 8).	985	The maximum number of concurrent connections to the same host (identified
		986	by the hostname). If the limit is exceeded, then the additional requests
		987	are queued until previous connections are closed.
321		988
322	Not implemented currently.	989	The default value for this is C<4>, and it is highly advisable to not
		990	increase it.
323		991
324	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	992	=item $AnyEvent::HTTP::ACTIVE
325		993
326	The maximum time to cache a persistent connection, in seconds (default: 2).	994	The number of active connections. This is not the number of currently
327		995	running requests, but the number of currently open and non-idle TCP
328	Not implemented currently.	996	connections. This number of can be useful for load-leveling.
329		997
330	=back	998	=back
331		999
332	=cut	1000	=cut
333		1001
		1002	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		1003	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		1004
		1005	sub format_date($) {
		1006	my ($time) = @_;
		1007
		1008	# RFC 822/1123 format
		1009	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		1010
		1011	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		1012	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		1013	$H, $M, $S;
		1014	}
		1015
		1016	sub parse_date($) {
		1017	my ($date) = @_;
		1018
		1019	my ($d, $m, $y, $H, $M, $S);
		1020
		1021	if ($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$/) {
		1022	# RFC 822/1123, required by RFC 2616 (with " ")
		1023	# cookie dates (with "-")
		1024
		1025	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		1026
		1027	} elsif ($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$/) {
		1028	# RFC 850
		1029	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		1030
		1031	} elsif ($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])$/) {
		1032	# ISO C's asctime
		1033	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		1034	}
		1035	# other formats fail in the loop below
		1036
		1037	for (0..11) {
		1038	if ($m eq $month[$_]) {
		1039	require Time::Local;
		1040	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		1041	}
		1042	}
		1043
		1044	undef
		1045	}
		1046
334	sub set_proxy($) {	1047	sub set_proxy($) {
		1048	if (length $_[0]) {
335	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	1049	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		1050	or Carp::croak "$_[0]: invalid proxy URL";
		1051	$PROXY = [$2, $3 \|\| 3128, $1]
		1052	} else {
		1053	undef $PROXY;
		1054	}
336	}	1055	}
337		1056
338	# initialise proxy from environment	1057	# initialise proxy from environment
		1058	eval {
339	set_proxy $ENV{http_proxy};	1059	set_proxy $ENV{http_proxy};
		1060	};
		1061
		1062	=head2 SOCKS PROXIES
		1063
		1064	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		1065	compile your perl to support socks, or use an external program such as
		1066	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		1067	transparently.
		1068
		1069	Alternatively, for AnyEvent::HTTP only, you can use your own
		1070	C<tcp_connect> function that does the proxy handshake - here is an example
		1071	that works with socks4a proxies:
		1072
		1073	use Errno;
		1074	use AnyEvent::Util;
		1075	use AnyEvent::Socket;
		1076	use AnyEvent::Handle;
		1077
		1078	# host, port and username of/for your socks4a proxy
		1079	my $socks_host = "10.0.0.23";
		1080	my $socks_port = 9050;
		1081	my $socks_user = "";
		1082
		1083	sub socks4a_connect {
		1084	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		1085
		1086	my $hdl = new AnyEvent::Handle
		1087	connect => [$socks_host, $socks_port],
		1088	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1089	on_error => sub { $connect_cb->() },
		1090	;
		1091
		1092	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1093
		1094	$hdl->push_read (chunk => 8, sub {
		1095	my ($hdl, $chunk) = @_;
		1096	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1097
		1098	if ($status == 0x5a) {
		1099	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1100	} else {
		1101	$! = Errno::ENXIO; $connect_cb->();
		1102	}
		1103	});
		1104
		1105	$hdl
		1106	}
		1107
		1108	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1109	possibly after switching off other proxy types:
		1110
		1111	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1112
		1113	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1114	my ($data, $headers) = @_;
		1115	...
		1116	};
340		1117
341	=head1 SEE ALSO	1118	=head1 SEE ALSO
342		1119
343	L<AnyEvent>.	1120	L<AnyEvent>.
344		1121
345	=head1 AUTHOR	1122	=head1 AUTHOR
346		1123
347	Marc Lehmann <schmorp@schmorp.de>	1124	Marc Lehmann <schmorp@schmorp.de>
348	http://home.schmorp.de/	1125	http://home.schmorp.de/
		1126
		1127	With many thanks to Дмитрий Шалашов, who provided countless
		1128	testcases and bugreports.
349		1129
350	=cut	1130	=cut
351		1131
352	1	1132	1
353		1133

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.5 by root, Wed Jun 4 12:03:47 2008 UTC vs. Revision 1.79 by root, Sat Jan 1 20:01:07 2011 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.5 by root, Wed Jun 4 12:03:47 2008 UTC vs.
Revision 1.79 by root, Sat Jan 1 20:01:07 2011 UTC