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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.12 by root, Thu Jun 5 16:33:02 2008 UTC vs.
Revision 1.78 by root, Sat Jan 1 19:32:41 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.
…		…
35	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
36		40
37	use strict;	41	use strict;
38	no warnings;	42	no warnings;
39		43
40	use Carp;	44	use Errno ();
41		45
42	use AnyEvent ();	46	use AnyEvent 5.0 ();
43	use AnyEvent::Util ();	47	use AnyEvent::Util ();
44	use AnyEvent::Socket ();
45	use AnyEvent::Handle ();	48	use AnyEvent::Handle ();
46		49
47	use base Exporter::;	50	use base Exporter::;
48		51
49	our $VERSION = '1.0';	52	our $VERSION = '1.5';
50		53
51	our @EXPORT = qw(http_get http_request);	54	our @EXPORT = qw(http_get http_post http_head http_request);
52		55
53	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)";
54	our $MAX_RECURSE = 10;	57	our $MAX_RECURSE = 10;
55	our $MAX_PERSISTENT = 8;	58	our $MAX_PERSISTENT = 8;
56	our $PERSISTENT_TIMEOUT = 2;	59	our $PERSISTENT_TIMEOUT = 2;
57	our $TIMEOUT = 300;	60	our $TIMEOUT = 300;
58		61
59	# changing these is evil	62	# changing these is evil
60	our $MAX_PERSISTENT_PER_HOST = 2;	63	our $MAX_PERSISTENT_PER_HOST = 0;
61	our $MAX_PER_HOST = 4;	64	our $MAX_PER_HOST = 4;
62		65
63	our $PROXY;	66	our $PROXY;
		67	our $ACTIVE = 0;
64		68
65	my %KA_COUNT; # number of open keep-alive connections per host	69	my %KA_COUNT; # number of open keep-alive connections per host
66	my %CO_SLOT; # number of open connections, and wait queue, per host	70	my %CO_SLOT; # number of open connections, and wait queue, per host
67		71
68	=item http_get $url, key => value..., $cb->($data, $headers)	72	=item http_get $url, key => value..., $cb->($data, $headers)
69		73
70	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
71	additional parameters.	75	additional parameters and the return value.
72		76
73	=item http_head $url, key => value..., $cb->($data, $headers)	77	=item http_head $url, key => value..., $cb->($data, $headers)
74		78
75	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
76	additional parameters.	80	on additional parameters and the return value.
77		81
78	=item http_post $url, $body, key => value..., $cb->($data, $headers)	82	=item http_post $url, $body, key => value..., $cb->($data, $headers)
79		83
80	Executes an HTTP-POST request with a request body of C<$bod>. See the	84	Executes an HTTP-POST request with a request body of C<$body>. See the
81	http_request function for details on additional parameters.	85	http_request function for details on additional parameters and the return
		86	value.
82		87
83	=item http_request $method => $url, key => value..., $cb->($data, $headers)	88	=item http_request $method => $url, key => value..., $cb->($data, $headers)
84		89
85	Executes a HTTP request of type C<$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
86	must be an absolute http or https URL.	91	must be an absolute http or https URL.
87		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
88	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
89	(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
90	response headers as second argument.	100	(and trailers) as second argument.
91		101
92	All the headers in that hash are lowercased. In addition to the response	102	All the headers in that hash are lowercased. In addition to the response
93	headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and	103	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
94	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
		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	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		121	response, and so on.
		122
95	name. If the server sends a header multiple lines, then their contents	123	If the server sends a header multiple times, then their contents will be
96	will be joined together with C<\x00>.	124	joined together with a comma (C<,>), as per the HTTP spec.
97		125
98	If an internal error occurs, such as not being able to resolve a hostname,	126	If an internal error occurs, such as not being able to resolve a hostname,
99	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	127	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be
100	and the C<Reason> pseudo-header will contain an error message.	128	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
		129	message. Currently the following status codes are used:
		130
		131	=over 4
		132
		133	=item 595 - errors during connection etsbalishment, proxy handshake.
		134
		135	=item 596 - errors during TLS negotiation, request sending and header processing.
		136
		137	=item 597 - errors during body receiving or processing.
		138
		139	=item 598 - user aborted request via C<on_header> or C<on_body>.
		140
		141	=item 599 - other, usually nonretryable, errors (garbled URL etc.).
		142
		143	=back
101		144
102	A typical callback might look like this:	145	A typical callback might look like this:
103		146
104	sub {	147	sub {
105	my ($body, $hdr) = @_;	148	my ($body, $hdr) = @_;
…		…
121	Whether to recurse requests or not, e.g. on redirects, authentication	164	Whether to recurse requests or not, e.g. on redirects, authentication
122	retries and so on, and how often to do so.	165	retries and so on, and how often to do so.
123		166
124	=item headers => hashref	167	=item headers => hashref
125		168
126	The request headers to use. Currently, C<http_request> may provide its	169	The request headers to use. Currently, C<http_request> may provide its own
127	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers	170	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
128	and will provide defaults for C<User-Agent:> and C<Referer:>.	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).
129		174
130	=item timeout => $seconds	175	=item timeout => $seconds
131		176
132	The time-out to use for various stages - each connect attempt will reset	177	The time-out to use for various stages - each connect attempt will reset
133	the timeout, as will read or write activity. Default timeout is 5 minutes.	178	the timeout, as will read or write activity, i.e. this is not an overall
		179	timeout.
		180
		181	Default timeout is 5 minutes.
134		182
135	=item proxy => [$host, $port[, $scheme]] or undef	183	=item proxy => [$host, $port[, $scheme]] or undef
136		184
137	Use the given http proxy for all requests. If not specified, then the	185	Use the given http proxy for all requests. If not specified, then the
138	default proxy (as specified by C<$ENV{http_proxy}>) is used.	186	default proxy (as specified by C<$ENV{http_proxy}>) is used.
139		187
140	C<$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
141	HTTPS.	189	HTTPS.
142		190
143	=item body => $string	191	=item body => $string
144		192
145	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
146	this module might offer more options).	194	this module might offer more options).
147		195
148	=item cookie_jar => $hash_ref	196	=item cookie_jar => $hash_ref
149		197
150	Passing this parameter enables (simplified) cookie-processing, loosely	198	Passing this parameter enables (simplified) cookie-processing, loosely
151	based on the original netscape specification.	199	based on the original netscape specification.
152		200
153	The C<$hash_ref> must be an (initially empty) hash reference which will	201	The C<$hash_ref> must be an (initially empty) hash reference which will
154	get updated automatically. It is possible to save the cookie_jar to	202	get updated automatically. It is possible to save the cookie jar to
155	persistent storage with something like JSON or Storable, but this is not	203	persistent storage with something like JSON or Storable, but this is not
156	recommended, as expire times are currently being ignored.	204	recommended, as session-only cookies might survive longer than expected.
157		205
158	Note that this cookie implementation is not of very high quality, nor	206	Note that this cookie implementation is not meant to be complete. If
159	meant to be complete. If you want complete cookie management you have to	207	you want complete cookie management you have to do that on your
160	do that on your own. C<cookie_jar> is meant as a quick fix to get some	208	own. C<cookie_jar> is meant as a quick fix to get some cookie-using sites
161	cookie-using sites working. Cookies are a privacy disaster, do not use	209	working. Cookies are a privacy disaster, do not use them unless required
162	them unless required to.	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.
163		317
164	=back	318	=back
165		319
166	Example: make a simple HTTP GET request for http://www.nethype.de/	320	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		321	the response body.
167		322
168	http_request GET => "http://www.nethype.de/", sub {	323	http_request GET => "http://www.nethype.de/", sub {
169	my ($body, $hdr) = @_;	324	my ($body, $hdr) = @_;
170	print "$body\n";	325	print "$body\n";
171	};	326	};
172		327
173	Example: make a HTTP HEAD request on https://www.google.com/, use a	328	Example: do a HTTP HEAD request on https://www.google.com/, use a
174	timeout of 30 seconds.	329	timeout of 30 seconds.
175		330
176	http_request	331	http_request
177	GET => "https://www.google.com",	332	GET => "https://www.google.com",
178	timeout => 30,	333	timeout => 30,
…		…
181	use Data::Dumper;	336	use Data::Dumper;
182	print Dumper $hdr;	337	print Dumper $hdr;
183	}	338	}
184	;	339	;
185		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 $request;
		350
186	=cut	351	=cut
187		352
188	sub _slot_schedule;	353	sub _slot_schedule;
189	sub _slot_schedule($) {	354	sub _slot_schedule($) {
190	my $host = shift;	355	my $host = shift;
191		356
192	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {	357	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
193	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {	358	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
194	# somebody wants that slot	359	# somebody wants that slot
195	++$CO_SLOT{$host}[0];	360	++$CO_SLOT{$host}[0];
		361	++$ACTIVE;
196		362
197	$cb->(AnyEvent::Util::guard {	363	$cb->(AnyEvent::Util::guard {
		364	--$ACTIVE;
198	--$CO_SLOT{$host}[0];	365	--$CO_SLOT{$host}[0];
199	_slot_schedule $host;	366	_slot_schedule $host;
200	});	367	});
201	} else {	368	} else {
202	# nobody wants the slot, maybe we can forget about it	369	# nobody wants the slot, maybe we can forget about it
…		…
211	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	378	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
212		379
213	_slot_schedule $_[0];	380	_slot_schedule $_[0];
214	}	381	}
215		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	while (
		439	m{
		440	\G\s*
		441	(?:
		442	expires \s=\s ([A-Z][a-z][a-z],\ [^,;]+)
		443	\| ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )
		444	)
		445	}gcxsi
		446	) {
		447	my $name = $2;
		448	my $value = $4;
		449
		450	unless (defined $name) {
		451	# expires
		452	$name = "expires";
		453	$value = $1;
		454	} elsif (!defined $value) {
		455	# quoted
		456	$value = $3;
		457	$value =~ s/\\(.)/$1/gs;
		458	}
		459
		460	push @kv, lc $name, $value;
		461
		462	last unless /\G\s*;/gc;
		463	}
		464
		465	last unless @kv;
		466
		467	my $name = shift @kv;
		468	my %kv = (value => shift @kv, @kv);
		469
		470	$kv{expires} \|\|= format_date (AE::now + $kv{"max-age"})
		471	if exists $kv{"max-age"};
		472
		473	my $cdom;
		474	my $cpath = (delete $kv{path}) \|\| "/";
		475
		476	if (exists $kv{domain}) {
		477	$cdom = delete $kv{domain};
		478
		479	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		480
		481	next if $cdom =~ /\.$/;
		482
		483	# this is not rfc-like and not netscape-like. go figure.
		484	my $ndots = $cdom =~ y/.//;
		485	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		486	} else {
		487	$cdom = $uhost;
		488	}
		489
		490	# store it
		491	$jar->{version} = 1;
		492	$jar->{$cdom}{$cpath}{$name} = \%kv;
		493
		494	redo if /\G\s*,/gc;
		495	}
		496	}
		497
		498	# continue to parse $_ for headers and place them into the arg
		499	sub parse_hdr() {
		500	my %hdr;
		501
		502	# things seen, not parsed:
		503	# p3pP="NON CUR OTPi OUR NOR UNI"
		504
		505	$hdr{lc $1} .= ",$2"
		506	while /\G
		507	([^:\000-\037]*):
		508	[\011\040]*
		509	((?: [^\012]+ \| \012[\011\040] )*)
		510	\012
		511	/gxc;
		512
		513	/\G$/
		514	or return;
		515
		516	# remove the "," prefix we added to all headers above
		517	substr $_, 0, 1, ""
		518	for values %hdr;
		519
		520	\%hdr
		521	}
		522
		523	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		524
		525	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		526	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		527
216	sub http_request($$$;@) {	528	sub http_request($$@) {
217	my $cb = pop;	529	my $cb = pop;
218	my ($method, $url, %arg) = @_;	530	my ($method, $url, %arg) = @_;
219		531
220	my %hdr;	532	my %hdr;
		533
		534	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		535	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
221		536
222	$method = uc $method;	537	$method = uc $method;
223		538
224	if (my $hdr = $arg{headers}) {	539	if (my $hdr = $arg{headers}) {
225	while (my ($k, $v) = each %$hdr) {	540	while (my ($k, $v) = each %$hdr) {
226	$hdr{lc $k} = $v;	541	$hdr{lc $k} = $v;
227	}	542	}
228	}	543	}
229		544
		545	# pseudo headers for all subsequent responses
		546	my @pseudo = (URL => $url);
		547	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		548
230	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;	549	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
231		550
232	return $cb->(undef, { Status => 599, Reason => "recursion limit reached" })	551	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
233	if $recurse < 0;	552	if $recurse < 0;
234		553
235	my $proxy = $arg{proxy} \|\| $PROXY;	554	my $proxy = $arg{proxy} \|\| $PROXY;
236	my $timeout = $arg{timeout} \|\| $TIMEOUT;	555	my $timeout = $arg{timeout} \|\| $TIMEOUT;
237		556
238	$hdr{"user-agent"} \|\|= $USERAGENT;
239
240	my ($scheme, $authority, $upath, $query, $fragment) =	557	my ($uscheme, $uauthority, $upath, $query, $fragment) =
241	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	558	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
242		559
243	$scheme = lc $scheme;	560	$uscheme = lc $uscheme;
244		561
245	my $uport = $scheme eq "http" ? 80	562	my $uport = $uscheme eq "http" ? 80
246	: $scheme eq "https" ? 443	563	: $uscheme eq "https" ? 443
247	: return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported" });	564	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
248		565
249	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	566	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
250	or return $cb->(undef, { Status => 599, Reason => "unparsable URL" });	567	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
251		568
252	my $uhost = $1;	569	my $uhost = $1;
253	$uport = $2 if defined $2;	570	$uport = $2 if defined $2;
254		571
		572	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		573	unless exists $hdr{host};
		574
255	$uhost =~ s/^\[(.*)\]$/$1/;	575	$uhost =~ s/^\[(.*)\]$/$1/;
256	$upath .= "?$query" if length $query;	576	$upath .= $query if length $query;
257		577
258	$upath =~ s%^/?%/%;	578	$upath =~ s%^/?%/%;
259
260	$hdr{referer} \|\|= "$scheme://$authority$upath";
261		579
262	# cookie processing	580	# cookie processing
263	if (my $jar = $arg{cookie_jar}) {	581	if (my $jar = $arg{cookie_jar}) {
264	%$jar = () if $jar->{version} < 1;	582	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
265		583
266	my @cookie;
267
268	while (my ($chost, $v) = each %$jar) {
269	next unless $chost eq substr $uhost, -length $chost;
270	next unless $chost =~ /^\./;
271
272	while (my ($cpath, $v) = each %$v) {
273	next unless $cpath eq substr $upath, 0, length $cpath;
274
275	while (my ($k, $v) = each %$v) {
276	next if $scheme ne "https" && exists $v->{secure};
277	push @cookie, "$k=$v->{value}";
278	}
279	}
280	}
281
282	$hdr{cookie} = join "; ", @cookie	584	$hdr{cookie} = join "; ", @$cookies
283	if @cookie;	585	if @$cookies;
284	}	586	}
285		587
286	my ($rhost, $rport, $rpath); # request host, port, path	588	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
287		589
288	if ($proxy) {	590	if ($proxy) {
289	($rhost, $rport, $scheme) = @$proxy;	591	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
290	$rpath = $url;	592
		593	$rscheme = "http" unless defined $rscheme;
		594
		595	# don't support https requests over https-proxy transport,
		596	# can't be done with tls as spec'ed, unless you double-encrypt.
		597	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
291	} else {	598	} else {
292	($rhost, $rport, $rpath) = ($uhost, $uport, $upath);	599	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
293	$hdr{host} = $uhost;
294	}	600	}
295		601
		602	# leave out fragment and query string, just a heuristic
		603	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		604	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
		605
296	$hdr{"content-length"} = length $arg{body};	606	$hdr{"content-length"} = length $arg{body}
		607	if length $arg{body} \|\| $method ne "GET";
		608
		609	$hdr{connection} = "close TE"; #1.1
		610	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
297		611
298	my %state = (connect_guard => 1);	612	my %state = (connect_guard => 1);
299		613
300	_get_slot $uhost, sub {	614	_get_slot $uhost, sub {
301	$state{slot_guard} = shift;	615	$state{slot_guard} = shift;
302		616
303	return unless $state{connect_guard};	617	return unless $state{connect_guard};
304		618
305	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	619	my $ae_error = 595; # connecting
		620
		621	my $connect_cb = sub {
306	$state{fh} = shift	622	$state{fh} = shift
		623	or do {
		624	my $err = "$!";
		625	%state = ();
307	or return $cb->(undef, { Status => 599, Reason => "$!" });	626	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });
		627	};
308		628
309	delete $state{connect_guard}; # reduce memory usage, save a tree	629	return unless delete $state{connect_guard};
310		630
311	# get handle	631	# get handle
312	$state{handle} = new AnyEvent::Handle	632	$state{handle} = new AnyEvent::Handle
313	fh => $state{fh},	633	fh => $state{fh},
314	($scheme eq "https" ? (tls => "connect") : ());	634	peername => $rhost,
		635	tls_ctx => $arg{tls_ctx},
		636	# these need to be reconfigured on keepalive handles
		637	timeout => $timeout,
		638	on_error => sub {
		639	%state = ();
		640	$cb->(undef, { @pseudo, Status => $ae_error, Reason => $_[2] });
		641	},
		642	on_eof => sub {
		643	%state = ();
		644	$cb->(undef, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" });
		645	},
		646	;
315		647
316	# limit the number of persistent connections	648	# limit the number of persistent connections
		649	# keepalive not yet supported
317	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	650	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
318	++$KA_COUNT{$_[1]};	651	# ++$KA_COUNT{$_[1]};
319	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	652	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		653	# --$KA_COUNT{$_[1]}
		654	# };
320	$hdr{connection} = "keep-alive";	655	# $hdr{connection} = "keep-alive";
321	delete $hdr{connection}; # keep-alive not yet supported
322	} else {
323	delete $hdr{connection};
324	}	656	# }
325		657
326	# (re-)configure handle	658	$state{handle}->starttls ("connect") if $rscheme eq "https";
327	$state{handle}->timeout ($timeout);
328	$state{handle}->on_error (sub {
329	%state = ();
330	$cb->(undef, { Status => 599, Reason => "$!" });
331	});
332	$state{handle}->on_eof (sub {
333	%state = ();
334	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
335	});
336		659
		660	# handle actual, non-tunneled, request
		661	my $handle_actual_request = sub {
		662	$ae_error = 596; # request phase
		663
		664	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		665
337	# send request	666	# send request
338	$state{handle}->push_write (	667	$state{handle}->push_write (
339	"$method $rpath HTTP/1.0\015\012"	668	"$method $rpath HTTP/1.1\015\012"
340	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)	669	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
341	. "\015\012"	670	. "\015\012"
342	. (delete $arg{body})	671	. (delete $arg{body})
343	);
344
345	%hdr = (); # reduce memory usage, save a kitten
346
347	# status line
348	$state{handle}->push_read (line => qr/\015?\012/, sub {
349	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
350	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
351
352	my %hdr = ( # response headers
353	HTTPVersion => "\x00$1",
354	Status => "\x00$2",
355	Reason => "\x00$3",
356	);	672	);
357		673
358	# headers, could be optimized a bit	674	# return if error occured during push_write()
359	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {	675	return unless %state;
		676
		677	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
		678
		679	# status line and headers
		680	$state{read_response} = sub {
360	for ("$_[1]\012") {	681	for ("$_[1]") {
361	# we support spaces in field names, as lotus domino	682	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
362	# creates them.
363	$hdr{lc $1} .= "\x00$2"
364	while /\G
365	([^:\000-\037]+):
366	[\011\040]*
367	((?: [^\015\012]+ \| \015?\012[\011\040] )*)
368	\015?\012
369	/gxc;
370		683
		684	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
		685	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
		686
		687	# 100 Continue handling
		688	# should not happen as we don't send expect: 100-continue,
		689	# but we handle it just in case.
		690	# since we send the request body regardless, if we get an error
		691	# we are out of-sync, which we currently do NOT handle correctly.
		692	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		693	if $2 eq 100;
		694
		695	push @pseudo,
		696	HTTPVersion => $1,
		697	Status => $2,
		698	Reason => $3,
371	/\G$/	699	;
		700
		701	my $hdr = parse_hdr
372	or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers" }));	702	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
		703
		704	%hdr = (%$hdr, @pseudo);
373	}	705	}
374		706
375	substr $_, 0, 1, ""	707	# redirect handling
376	for values %hdr;	708	# microsoft and other shitheads don't give a shit for following standards,
		709	# try to support some common forms of broken Location headers.
		710	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		711	$hdr{location} =~ s/^\.\/+//;
377		712
378	my $finish = sub {	713	my $url = "$rscheme://$uhost:$uport";
		714
		715	unless ($hdr{location} =~ s/^\///) {
		716	$url .= $upath;
		717	$url =~ s/\/[^\/]*$//;
		718	}
		719
		720	$hdr{location} = "$url/$hdr{location}";
		721	}
		722
		723	my $redirect;
		724
		725	if ($recurse) {
		726	my $status = $hdr{Status};
		727
		728	# industry standard is to redirect POST as GET for
		729	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		730	# also, the UA should ask the user for 301 and 307 and POST,
		731	# industry standard seems to be to simply follow.
		732	# we go with the industry standard.
		733	if ($status == 301 or $status == 302 or $status == 303) {
		734	# HTTP/1.1 is unclear on how to mutate the method
		735	$method = "GET" unless $method eq "HEAD";
		736	$redirect = 1;
		737	} elsif ($status == 307) {
		738	$redirect = 1;
		739	}
		740	}
		741
		742	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
		743	my $may_keep_alive = $_[3];
		744
		745	$state{handle}->destroy if $state{handle};
379	%state = ();	746	%state = ();
380		747
		748	if (defined $_[1]) {
		749	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		750	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		751	}
		752
381	# set-cookie processing	753	# set-cookie processing
382	if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {	754	if ($arg{cookie_jar}) {
383	for (split /\x00/, $hdr{"set-cookie"}) {	755	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost;
384	my ($cookie, @arg) = split /;\s*/;	756	}
385	my ($name, $value) = split /=/, $cookie, 2;
386	my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
387
388	my $cdom = (delete $kv{domain}) \|\| $uhost;
389	my $cpath = (delete $kv{path}) \|\| "/";
390
391	$cdom =~ s/^.?/./; # make sure it starts with a "."
392		757
393	next if $cdom =~ /\.$/;	758	if ($redirect && exists $hdr{location}) {
394		759	# we ignore any errors, as it is very common to receive
395	# this is not rfc-like and not netscape-like. go figure.	760	# Content-Length != 0 but no actual body
396	my $ndots = $cdom =~ y/.//;	761	# we also access %hdr, as $_[1] might be an erro
397	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	762	http_request (
398		763	$method => $hdr{location},
		764	%arg,
		765	recurse => $recurse - 1,
		766	Redirect => [$_[0], \%hdr],
		767	$cb);
		768	} else {
		769	$cb->($_[0], \%hdr);
		770	}
		771	};
		772
		773	$ae_error = 597; # body phase
		774
		775	my $len = $hdr{"content-length"};
		776
		777	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		778	$finish->(undef, 598 => "Request cancelled by on_header");
		779	} elsif (
		780	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		781	or $method eq "HEAD"
		782	or (defined $len && !$len)
		783	) {
		784	# no body
		785	$finish->("", undef, undef, 1);
		786	} else {
		787	# body handling, many different code paths
		788	# - no body expected
		789	# - want_body_handle
		790	# - te chunked
		791	# - 2x length known (with or without on_body)
		792	# - 2x length not known (with or without on_body)
		793	if (!$redirect && $arg{want_body_handle}) {
		794	$_[0]->on_eof (undef);
		795	$_[0]->on_error (undef);
		796	$_[0]->on_read (undef);
		797
		798	$finish->(delete $state{handle});
		799
		800	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
		801	my $cl = 0;
		802	my $body = undef;
		803	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		804
		805	my $read_chunk; $read_chunk = sub {
		806	$_[1] =~ /^([0-9a-fA-F]+)/
		807	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		808
		809	my $len = hex $1;
		810
		811	if ($len) {
		812	$cl += $len;
		813
		814	$_[0]->push_read (chunk => $len, sub {
		815	$on_body->($_[1], \%hdr)
		816	or return $finish->(undef, 598 => "Request cancelled by on_body");
		817
		818	$_[0]->push_read (line => sub {
		819	length $_[1]
		820	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		821	$_[0]->push_read (line => $read_chunk);
		822	});
		823	});
399	# store it	824	} else {
400	$arg{cookie_jar}{version} = 1;	825	$hdr{"content-length"} \|\|= $cl;
401	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;	826
		827	$_[0]->push_read (line => $qr_nlnl, sub {
		828	if (length $_[1]) {
		829	for ("$_[1]") {
		830	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		831
		832	my $hdr = parse_hdr
		833	or return $finish->(undef, $ae_error => "Garbled response trailers");
		834
		835	%hdr = (%hdr, %$hdr);
		836	}
		837	}
		838
		839	$finish->($body, undef, undef, 1);
		840	});
		841	}
		842	};
		843
		844	$_[0]->push_read (line => $read_chunk);
		845
		846	} elsif ($arg{on_body}) {
		847	if ($len) {
		848	$_[0]->on_read (sub {
		849	$len -= length $_[0]{rbuf};
		850
		851	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		852	or return $finish->(undef, 598 => "Request cancelled by on_body");
		853
		854	$len > 0
		855	or $finish->("", undef, undef, 1);
		856	});
		857	} else {
		858	$_[0]->on_eof (sub {
		859	$finish->("");
		860	});
		861	$_[0]->on_read (sub {
		862	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		863	or $finish->(undef, 598 => "Request cancelled by on_body");
		864	});
		865	}
		866	} else {
		867	$_[0]->on_eof (undef);
		868
		869	if ($len) {
		870	$_[0]->on_read (sub {
		871	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		872	if $len <= length $_[0]{rbuf};
		873	});
		874	} else {
		875	$_[0]->on_error (sub {
		876	($! == Errno::EPIPE \|\| !$!)
		877	? $finish->(delete $_[0]{rbuf})
		878	: $finish->(undef, $ae_error => $_[2]);
		879	});
		880	$_[0]->on_read (sub { });
402	}	881	}
403	}	882	}
404
405	if ($_[1]{Status} =~ /^x30[12]$/ && $recurse) {
406	# microsoft and other assholes don't give a shit for following standards,
407	# try to support a common form of broken Location header.
408	$_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;
409
410	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
411	} else {
412	$cb->($_[0], $_[1]);
413	}
414	};	883	}
		884	};
415		885
416	if ($hdr{Status} =~ /^(?:1..\|204\|304)$/ or $method eq "HEAD") {	886	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
417	$finish->(undef, \%hdr);	887	};
		888
		889	# now handle proxy-CONNECT method
		890	if ($proxy && $uscheme eq "https") {
		891	# oh dear, we have to wrap it into a connect request
		892
		893	# maybe re-use $uauthority with patched port?
		894	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		895	$state{handle}->push_read (line => $qr_nlnl, sub {
		896	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		897	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
		898
		899	if ($2 == 200) {
		900	$rpath = $upath;
		901	&$handle_actual_request;
418	} else {	902	} else {
419	if (exists $hdr{"content-length"}) {	903	%state = ();
420	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	904	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
421	# could cache persistent connection now
422	if ($hdr{connection} =~ /\bkeep-alive\b/i) {
423	# but we don't, due to misdesigns, this is annoyingly complex
424	};
425
426	$finish->($_[1], \%hdr);
427	});
428	} else {
429	# too bad, need to read until we get an error or EOF,
430	# no way to detect winged data.
431	$_[0]->on_error (sub {
432	$finish->($_[0]{rbuf}, \%hdr);
433	});
434	$_[0]->on_eof (undef);
435	$_[0]->on_read (sub { });
436	}
437	}	905	}
438	});	906	});
		907	} else {
		908	&$handle_actual_request;
439	});	909	}
440	}, sub {
441	$timeout
442	};	910	};
		911
		912	my $tcp_connect = $arg{tcp_connect}
		913	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		914
		915	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		916
443	};	917	};
444		918
445	defined wantarray && AnyEvent::Util::guard { %state = () }	919	defined wantarray && AnyEvent::Util::guard { %state = () }
446	}	920	}
447		921
448	sub http_get($$;@) {	922	sub http_get($@) {
449	unshift @_, "GET";	923	unshift @_, "GET";
450	&http_request	924	&http_request
451	}	925	}
452		926
453	sub http_head($$;@) {	927	sub http_head($@) {
454	unshift @_, "HEAD";	928	unshift @_, "HEAD";
455	&http_request	929	&http_request
456	}	930	}
457		931
458	sub http_post($$$;@) {	932	sub http_post($$@) {
		933	my $url = shift;
459	unshift @_, "POST", "body";	934	unshift @_, "POST", $url, "body";
460	&http_request	935	&http_request
461	}	936	}
462		937
463	=back	938	=back
464		939
		940	=head2 DNS CACHING
		941
		942	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		943	the actual connection, which in turn uses AnyEvent::DNS to resolve
		944	hostnames. The latter is a simple stub resolver and does no caching
		945	on its own. If you want DNS caching, you currently have to provide
		946	your own default resolver (by storing a suitable resolver object in
		947	C<$AnyEvent::DNS::RESOLVER>).
		948
465	=head2 GLOBAL FUNCTIONS AND VARIABLES	949	=head2 GLOBAL FUNCTIONS AND VARIABLES
466		950
467	=over 4	951	=over 4
468		952
469	=item AnyEvent::HTTP::set_proxy "proxy-url"	953	=item AnyEvent::HTTP::set_proxy "proxy-url"
470		954
471	Sets the default proxy server to use. The proxy-url must begin with a	955	Sets the default proxy server to use. The proxy-url must begin with a
472	string of the form C<http://host:port> (optionally C<https:...>).	956	string of the form C<http://host:port> (optionally C<https:...>), croaks
		957	otherwise.
		958
		959	To clear an already-set proxy, use C<undef>.
		960
		961	=item $date = AnyEvent::HTTP::format_date $timestamp
		962
		963	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		964	Date (RFC 2616).
		965
		966	=item $timestamp = AnyEvent::HTTP::parse_date $date
		967
		968	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) and
		969	returns the corresponding POSIX timestamp, or C<undef> if the date cannot
		970	be parsed.
473		971
474	=item $AnyEvent::HTTP::MAX_RECURSE	972	=item $AnyEvent::HTTP::MAX_RECURSE
475		973
476	The default value for the C<recurse> request parameter (default: C<10>).	974	The default value for the C<recurse> request parameter (default: C<10>).
477		975
478	=item $AnyEvent::HTTP::USERAGENT	976	=item $AnyEvent::HTTP::USERAGENT
479		977
480	The default value for the C<User-Agent> header (the default is	978	The default value for the C<User-Agent> header (the default is
481	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	979	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
482		980
483	=item $AnyEvent::HTTP::MAX_PERSISTENT	981	=item $AnyEvent::HTTP::MAX_PER_HOST
484		982
485	The maximum number of persistent connections to keep open (default: 8).	983	The maximum number of concurrent connections to the same host (identified
		984	by the hostname). If the limit is exceeded, then the additional requests
		985	are queued until previous connections are closed.
486		986
487	Not implemented currently.	987	The default value for this is C<4>, and it is highly advisable to not
		988	increase it.
488		989
489	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	990	=item $AnyEvent::HTTP::ACTIVE
490		991
491	The maximum time to cache a persistent connection, in seconds (default: 2).	992	The number of active connections. This is not the number of currently
492		993	running requests, but the number of currently open and non-idle TCP
493	Not implemented currently.	994	connections. This number of can be useful for load-leveling.
494		995
495	=back	996	=back
496		997
497	=cut	998	=cut
498		999
		1000	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		1001	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		1002
		1003	sub format_date($) {
		1004	my ($time) = @_;
		1005
		1006	# RFC 822/1123 format
		1007	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		1008
		1009	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		1010	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		1011	$H, $M, $S;
		1012	}
		1013
		1014	sub parse_date($) {
		1015	my ($date) = @_;
		1016
		1017	my ($d, $m, $y, $H, $M, $S);
		1018
		1019	if ($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$/) {
		1020	# RFC 822/1123, required by RFC 2616 (with " ")
		1021	# cookie dates (with "-")
		1022
		1023	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		1024
		1025	} elsif ($date =~ /^[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$/) {
		1026	# RFC 850
		1027	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		1028
		1029	} elsif ($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])$/) {
		1030	# ISO C's asctime
		1031	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		1032	}
		1033	# other formats fail in the loop below
		1034
		1035	for (0..11) {
		1036	if ($m eq $month[$_]) {
		1037	require Time::Local;
		1038	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		1039	}
		1040	}
		1041
		1042	undef
		1043	}
		1044
499	sub set_proxy($) {	1045	sub set_proxy($) {
		1046	if (length $_[0]) {
500	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	1047	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		1048	or Carp::croak "$_[0]: invalid proxy URL";
		1049	$PROXY = [$2, $3 \|\| 3128, $1]
		1050	} else {
		1051	undef $PROXY;
		1052	}
501	}	1053	}
502		1054
503	# initialise proxy from environment	1055	# initialise proxy from environment
		1056	eval {
504	set_proxy $ENV{http_proxy};	1057	set_proxy $ENV{http_proxy};
		1058	};
		1059
		1060	=head2 SOCKS PROXIES
		1061
		1062	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		1063	compile your perl to support socks, or use an external program such as
		1064	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		1065	transparently.
		1066
		1067	Alternatively, for AnyEvent::HTTP only, you can use your own
		1068	C<tcp_connect> function that does the proxy handshake - here is an example
		1069	that works with socks4a proxies:
		1070
		1071	use Errno;
		1072	use AnyEvent::Util;
		1073	use AnyEvent::Socket;
		1074	use AnyEvent::Handle;
		1075
		1076	# host, port and username of/for your socks4a proxy
		1077	my $socks_host = "10.0.0.23";
		1078	my $socks_port = 9050;
		1079	my $socks_user = "";
		1080
		1081	sub socks4a_connect {
		1082	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		1083
		1084	my $hdl = new AnyEvent::Handle
		1085	connect => [$socks_host, $socks_port],
		1086	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1087	on_error => sub { $connect_cb->() },
		1088	;
		1089
		1090	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1091
		1092	$hdl->push_read (chunk => 8, sub {
		1093	my ($hdl, $chunk) = @_;
		1094	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1095
		1096	if ($status == 0x5a) {
		1097	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1098	} else {
		1099	$! = Errno::ENXIO; $connect_cb->();
		1100	}
		1101	});
		1102
		1103	$hdl
		1104	}
		1105
		1106	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1107	possibly after switching off other proxy types:
		1108
		1109	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1110
		1111	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1112	my ($data, $headers) = @_;
		1113	...
		1114	};
505		1115
506	=head1 SEE ALSO	1116	=head1 SEE ALSO
507		1117
508	L<AnyEvent>.	1118	L<AnyEvent>.
509		1119
510	=head1 AUTHOR	1120	=head1 AUTHOR
511		1121
512	Marc Lehmann <schmorp@schmorp.de>	1122	Marc Lehmann <schmorp@schmorp.de>
513	http://home.schmorp.de/	1123	http://home.schmorp.de/
		1124
		1125	With many thanks to Дмитрий Шалашов, who provided countless
		1126	testcases and bugreports.
514		1127
515	=cut	1128	=cut
516		1129
517	1	1130	1
518		1131

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.12 by root, Thu Jun 5 16:33:02 2008 UTC vs. Revision 1.78 by root, Sat Jan 1 19:32:41 2011 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.12 by root, Thu Jun 5 16:33:02 2008 UTC vs.
Revision 1.78 by root, Sat Jan 1 19:32:41 2011 UTC