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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.11 by root, Thu Jun 5 15:34:00 2008 UTC vs.
Revision 1.68 by root, Fri Dec 31 19:22:18 2010 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<< $headers->{Status} >> will be C<59x>
100	and the C<Reason> pseudo-header will contain an error message.	128	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		129	message.
101		130
102	A typical callback might look like this:	131	A typical callback might look like this:
103		132
104	sub {	133	sub {
105	my ($body, $hdr) = @_;	134	my ($body, $hdr) = @_;
…		…
121	Whether to recurse requests or not, e.g. on redirects, authentication	150	Whether to recurse requests or not, e.g. on redirects, authentication
122	retries and so on, and how often to do so.	151	retries and so on, and how often to do so.
123		152
124	=item headers => hashref	153	=item headers => hashref
125		154
126	The request headers to use.	155	The request headers to use. Currently, C<http_request> may provide its own
		156	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
		157	will provide defaults for C<TE:>, C<Referer:> and C<User-Agent:> (this can
		158	be suppressed by using C<undef> for these headers in which case they won't
		159	be sent at all).
127		160
128	=item timeout => $seconds	161	=item timeout => $seconds
129		162
130	The time-out to use for various stages - each connect attempt will reset	163	The time-out to use for various stages - each connect attempt will reset
131	the timeout, as will read or write activity. Default timeout is 5 minutes.	164	the timeout, as will read or write activity, i.e. this is not an overall
		165	timeout.
		166
		167	Default timeout is 5 minutes.
132		168
133	=item proxy => [$host, $port[, $scheme]] or undef	169	=item proxy => [$host, $port[, $scheme]] or undef
134		170
135	Use the given http proxy for all requests. If not specified, then the	171	Use the given http proxy for all requests. If not specified, then the
136	default proxy (as specified by C<$ENV{http_proxy}>) is used.	172	default proxy (as specified by C<$ENV{http_proxy}>) is used.
137		173
138	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	174	C<$scheme> must be either missing, C<http> for HTTP or C<https> for
139	HTTPS.	175	HTTPS.
140		176
141	=item body => $string	177	=item body => $string
142		178
143	The request body, usually empty. Will be-sent as-is (future versions of	179	The request body, usually empty. Will be sent as-is (future versions of
144	this module might offer more options).	180	this module might offer more options).
145		181
146	=item cookie_jar => $hash_ref	182	=item cookie_jar => $hash_ref
147		183
148	Passing this parameter enables (simplified) cookie-processing, loosely	184	Passing this parameter enables (simplified) cookie-processing, loosely
149	based on the original netscape specification.	185	based on the original netscape specification.
150		186
151	The C<$hash_ref> must be an (initially empty) hash reference which will	187	The C<$hash_ref> must be an (initially empty) hash reference which will
152	get updated automatically. It is possible to save the cookie_jar to	188	get updated automatically. It is possible to save the cookie_jar to
153	persistent storage with something like JSON or Storable, but this is not	189	persistent storage with something like JSON or Storable, but this is not
154	recommended, as expire times are currently being ignored.	190	recommended, as expiry times are currently being ignored.
155		191
156	Note that this cookie implementation is not of very high quality, nor	192	Note that this cookie implementation is not of very high quality, nor
157	meant to be complete. If you want complete cookie management you have to	193	meant to be complete. If you want complete cookie management you have to
158	do that on your own. C<cookie_jar> is meant as a quick fix to get some	194	do that on your own. C<cookie_jar> is meant as a quick fix to get some
159	cookie-using sites working. Cookies are a privacy disaster, do not use	195	cookie-using sites working. Cookies are a privacy disaster, do not use
160	them unless required to.	196	them unless required to.
161		197
		198	=item tls_ctx => $scheme \| $tls_ctx
		199
		200	Specifies the AnyEvent::TLS context to be used for https connections. This
		201	parameter follows the same rules as the C<tls_ctx> parameter to
		202	L<AnyEvent::Handle>, but additionally, the two strings C<low> or
		203	C<high> can be specified, which give you a predefined low-security (no
		204	verification, highest compatibility) and high-security (CA and common-name
		205	verification) TLS context.
		206
		207	The default for this option is C<low>, which could be interpreted as "give
		208	me the page, no matter what".
		209
		210	=item on_prepare => $callback->($fh)
		211
		212	In rare cases you need to "tune" the socket before it is used to
		213	connect (for exmaple, to bind it on a given IP address). This parameter
		214	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		215	and behaves exactly the same way (e.g. it has to provide a
		216	timeout). See the description for the C<$prepare_cb> argument of
		217	C<AnyEvent::Socket::tcp_connect> for details.
		218
		219	=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
		220
		221	In even rarer cases you want total control over how AnyEvent::HTTP
		222	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
		223	to do this, but you can provide your own C<tcp_connect> function -
		224	obviously, it has to follow the same calling conventions, except that it
		225	may always return a connection guard object.
		226
		227	There are probably lots of weird uses for this function, starting from
		228	tracing the hosts C<http_request> actually tries to connect, to (inexact
		229	but fast) host => IP address caching or even socks protocol support.
		230
		231	=item on_header => $callback->($headers)
		232
		233	When specified, this callback will be called with the header hash as soon
		234	as headers have been successfully received from the remote server (not on
		235	locally-generated errors).
		236
		237	It has to return either true (in which case AnyEvent::HTTP will continue),
		238	or false, in which case AnyEvent::HTTP will cancel the download (and call
		239	the finish callback with an error code of C<598>).
		240
		241	This callback is useful, among other things, to quickly reject unwanted
		242	content, which, if it is supposed to be rare, can be faster than first
		243	doing a C<HEAD> request.
		244
		245	The downside is that cancelling the request makes it impossible to re-use
		246	the connection. Also, the C<on_header> callback will not receive any
		247	trailer (headers sent after the response body).
		248
		249	Example: cancel the request unless the content-type is "text/html".
		250
		251	on_header => sub {
		252	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		253	},
		254
		255	=item on_body => $callback->($partial_body, $headers)
		256
		257	When specified, all body data will be passed to this callback instead of
		258	to the completion callback. The completion callback will get the empty
		259	string instead of the body data.
		260
		261	It has to return either true (in which case AnyEvent::HTTP will continue),
		262	or false, in which case AnyEvent::HTTP will cancel the download (and call
		263	the completion callback with an error code of C<598>).
		264
		265	The downside to cancelling the request is that it makes it impossible to
		266	re-use the connection.
		267
		268	This callback is useful when the data is too large to be held in memory
		269	(so the callback writes it to a file) or when only some information should
		270	be extracted, or when the body should be processed incrementally.
		271
		272	It is usually preferred over doing your own body handling via
		273	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		274	only used to create a connection, C<want_body_handle> is the better
		275	alternative, as it allows you to install your own event handler, reducing
		276	resource usage.
		277
		278	=item want_body_handle => $enable
		279
		280	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		281	changes considerably: after parsing the headers, and instead of
		282	downloading the body (if any), the completion callback will be
		283	called. Instead of the C<$body> argument containing the body data, the
		284	callback will receive the L<AnyEvent::Handle> object associated with the
		285	connection. In error cases, C<undef> will be passed. When there is no body
		286	(e.g. status C<304>), the empty string will be passed.
		287
		288	The handle object might or might not be in TLS mode, might be connected to
		289	a proxy, be a persistent connection etc., and configured in unspecified
		290	ways. The user is responsible for this handle (it will not be used by this
		291	module anymore).
		292
		293	This is useful with some push-type services, where, after the initial
		294	headers, an interactive protocol is used (typical example would be the
		295	push-style twitter API which starts a JSON/XML stream).
		296
		297	If you think you need this, first have a look at C<on_body>, to see if
		298	that doesn't solve your problem in a better way.
		299
162	=back	300	=back
163		301
164	Example: make a simple HTTP GET request for http://www.nethype.de/	302	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		303	the response body.
165		304
166	http_request GET => "http://www.nethype.de/", sub {	305	http_request GET => "http://www.nethype.de/", sub {
167	my ($body, $hdr) = @_;	306	my ($body, $hdr) = @_;
168	print "$body\n";	307	print "$body\n";
169	};	308	};
170		309
171	Example: make a HTTP HEAD request on https://www.google.com/, use a	310	Example: do a HTTP HEAD request on https://www.google.com/, use a
172	timeout of 30 seconds.	311	timeout of 30 seconds.
173		312
174	http_request	313	http_request
175	GET => "https://www.google.com",	314	GET => "https://www.google.com",
176	timeout => 30,	315	timeout => 30,
…		…
179	use Data::Dumper;	318	use Data::Dumper;
180	print Dumper $hdr;	319	print Dumper $hdr;
181	}	320	}
182	;	321	;
183		322
		323	Example: do another simple HTTP GET request, but immediately try to
		324	cancel it.
		325
		326	my $request = http_request GET => "http://www.nethype.de/", sub {
		327	my ($body, $hdr) = @_;
		328	print "$body\n";
		329	};
		330
		331	undef $request;
		332
184	=cut	333	=cut
185		334
		335	sub _slot_schedule;
186	sub _slot_schedule($) {	336	sub _slot_schedule($) {
187	my $host = shift;	337	my $host = shift;
188		338
189	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {	339	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
190	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {	340	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
191	# somebody wnats that slot	341	# somebody wants that slot
192	++$CO_SLOT{$host}[0];	342	++$CO_SLOT{$host}[0];
		343	++$ACTIVE;
193		344
194	$cb->(AnyEvent::Util::guard {	345	$cb->(AnyEvent::Util::guard {
		346	--$ACTIVE;
195	--$CO_SLOT{$host}[0];	347	--$CO_SLOT{$host}[0];
196	_slot_schedule $host;	348	_slot_schedule $host;
197	});	349	});
198	} else {	350	} else {
199	# nobody wants the slot, maybe we can forget about it	351	# nobody wants the slot, maybe we can forget about it
200	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];	352	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
201	warn "$host deleted" unless $CO_SLOT{$host}[0];#d#
202	last;	353	last;
203	}	354	}
204	}	355	}
205	}	356	}
206		357
…		…
209	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	360	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
210		361
211	_slot_schedule $_[0];	362	_slot_schedule $_[0];
212	}	363	}
213		364
		365	# continue to parse $_ for headers and place them into the arg
		366	sub parse_hdr() {
		367	my %hdr;
		368
		369	# things seen, not parsed:
		370	# p3pP="NON CUR OTPi OUR NOR UNI"
		371
		372	$hdr{lc $1} .= ",$2"
		373	while /\G
		374	([^:\000-\037]*):
		375	[\011\040]*
		376	((?: [^\012]+ \| \012[\011\040] )*)
		377	\012
		378	/gxc;
		379
		380	/\G$/
		381	or return;
		382
		383	# remove the "," prefix we added to all headers above
		384	substr $_, 0, 1, ""
		385	for values %hdr;
		386
		387	\%hdr
		388	}
		389
		390	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		391
		392	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		393	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		394
214	sub http_request($$$;@) {	395	sub http_request($$@) {
215	my $cb = pop;	396	my $cb = pop;
216	my ($method, $url, %arg) = @_;	397	my ($method, $url, %arg) = @_;
217		398
218	my %hdr;	399	my %hdr;
		400
		401	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		402	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
219		403
220	$method = uc $method;	404	$method = uc $method;
221		405
222	if (my $hdr = $arg{headers}) {	406	if (my $hdr = $arg{headers}) {
223	while (my ($k, $v) = each %$hdr) {	407	while (my ($k, $v) = each %$hdr) {
224	$hdr{lc $k} = $v;	408	$hdr{lc $k} = $v;
225	}	409	}
226	}	410	}
227		411
		412	# pseudo headers for all subsequent responses
		413	my @pseudo = (URL => $url);
		414	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		415
228	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;	416	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
229		417
230	return $cb->(undef, { Status => 599, Reason => "recursion limit reached" })	418	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
231	if $recurse < 0;	419	if $recurse < 0;
232		420
233	my $proxy = $arg{proxy} \|\| $PROXY;	421	my $proxy = $arg{proxy} \|\| $PROXY;
234	my $timeout = $arg{timeout} \|\| $TIMEOUT;	422	my $timeout = $arg{timeout} \|\| $TIMEOUT;
235		423
236	$hdr{"user-agent"} \|\|= $USERAGENT;
237
238	my ($scheme, $authority, $upath, $query, $fragment) =	424	my ($uscheme, $uauthority, $upath, $query, $fragment) =
239	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	425	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
240		426
241	$scheme = lc $scheme;	427	$uscheme = lc $uscheme;
242		428
243	my $uport = $scheme eq "http" ? 80	429	my $uport = $uscheme eq "http" ? 80
244	: $scheme eq "https" ? 443	430	: $uscheme eq "https" ? 443
245	: return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported" });	431	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
246		432
247	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	433	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
248	or return $cb->(undef, { Status => 599, Reason => "unparsable URL" });	434	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
249		435
250	my $uhost = $1;	436	my $uhost = $1;
251	$uport = $2 if defined $2;	437	$uport = $2 if defined $2;
252		438
		439	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		440	unless exists $hdr{host};
		441
253	$uhost =~ s/^\[(.*)\]$/$1/;	442	$uhost =~ s/^\[(.*)\]$/$1/;
254	$upath .= "?$query" if length $query;	443	$upath .= $query if length $query;
255		444
256	$upath =~ s%^/?%/%;	445	$upath =~ s%^/?%/%;
257		446
258	# cookie processing	447	# cookie processing
259	if (my $jar = $arg{cookie_jar}) {	448	if (my $jar = $arg{cookie_jar}) {
260	%$jar = () if $jar->{version} < 1;	449	%$jar = () if $jar->{version} != 1;
261		450
262	my @cookie;	451	my @cookie;
263		452
264	while (my ($chost, $v) = each %$jar) {	453	while (my ($chost, $v) = each %$jar) {
		454	if ($chost =~ /^\./) {
265	next unless $chost eq substr $uhost, -length $chost;	455	next unless $chost eq substr $uhost, -length $chost;
266	next unless $chost =~ /^\./;	456	} elsif ($chost =~ /\./) {
		457	next unless $chost eq $uhost;
		458	} else {
		459	next;
		460	}
267		461
268	while (my ($cpath, $v) = each %$v) {	462	while (my ($cpath, $v) = each %$v) {
269	next unless $cpath eq substr $upath, 0, length $cpath;	463	next unless $cpath eq substr $upath, 0, length $cpath;
270		464
271	while (my ($k, $v) = each %$v) {	465	while (my ($k, $v) = each %$v) {
272	next if $scheme ne "https" && exists $v->{secure};	466	next if $uscheme ne "https" && exists $v->{secure};
		467	my $value = $v->{value};
		468	$value =~ s/([\\"])/\\$1/g;
273	push @cookie, "$k=$v->{value}";	469	push @cookie, "$k=\"$value\"";
274	}	470	}
275	}	471	}
276	}	472	}
277		473
278	$hdr{cookie} = join "; ", @cookie	474	$hdr{cookie} = join "; ", @cookie
279	if @cookie;	475	if @cookie;
280	}	476	}
281		477
282	my ($rhost, $rport, $rpath); # request host, port, path	478	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
283		479
284	if ($proxy) {	480	if ($proxy) {
285	($rhost, $rport, $scheme) = @$proxy;	481	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
286	$rpath = $url;	482
		483	$rscheme = "http" unless defined $rscheme;
		484
		485	# don't support https requests over https-proxy transport,
		486	# can't be done with tls as spec'ed, unless you double-encrypt.
		487	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
287	} else {	488	} else {
288	($rhost, $rport, $rpath) = ($uhost, $uport, $upath);	489	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
289	$hdr{host} = $uhost;
290	}	490	}
291		491
		492	# leave out fragment and query string, just a heuristic
		493	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		494	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
		495
292	$hdr{"content-length"} = length $arg{body};	496	$hdr{"content-length"} = length $arg{body}
		497	if length $arg{body} \|\| $method ne "GET";
		498
		499	$hdr{connection} = "close TE"; #1.1
		500	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
293		501
294	my %state = (connect_guard => 1);	502	my %state = (connect_guard => 1);
295		503
296	_get_slot $uhost, sub {	504	_get_slot $uhost, sub {
297	$state{slot_guard} = shift;	505	$state{slot_guard} = shift;
298		506
299	return unless $state{connect_guard};	507	return unless $state{connect_guard};
300		508
301	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	509	my $connect_cb = sub {
302	$state{fh} = shift	510	$state{fh} = shift
		511	or do {
		512	my $err = "$!";
		513	%state = ();
303	or return $cb->(undef, { Status => 599, Reason => "$!" });	514	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
		515	};
304		516
305	delete $state{connect_guard}; # reduce memory usage, save a tree	517	pop; # free memory, save a tree
		518
		519	return unless delete $state{connect_guard};
306		520
307	# get handle	521	# get handle
308	$state{handle} = new AnyEvent::Handle	522	$state{handle} = new AnyEvent::Handle
309	fh => $state{fh},	523	fh => $state{fh},
310	($scheme eq "https" ? (tls => "connect") : ());	524	peername => $rhost,
		525	tls_ctx => $arg{tls_ctx},
		526	# these need to be reconfigured on keepalive handles
		527	timeout => $timeout,
		528	on_error => sub {
		529	%state = ();
		530	$cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
		531	},
		532	on_eof => sub {
		533	%state = ();
		534	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
		535	},
		536	;
311		537
312	# limit the number of persistent connections	538	# limit the number of persistent connections
		539	# keepalive not yet supported
313	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	540	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
314	++$KA_COUNT{$_[1]};	541	# ++$KA_COUNT{$_[1]};
315	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	542	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		543	# --$KA_COUNT{$_[1]}
		544	# };
316	$hdr{connection} = "keep-alive";	545	# $hdr{connection} = "keep-alive";
317	delete $hdr{connection}; # keep-alive not yet supported
318	} else {
319	delete $hdr{connection};
320	}	546	# }
321		547
322	# (re-)configure handle	548	$state{handle}->starttls ("connect") if $rscheme eq "https";
323	$state{handle}->timeout ($timeout);
324	$state{handle}->on_error (sub {
325	%state = ();
326	$cb->(undef, { Status => 599, Reason => "$!" });
327	});
328	$state{handle}->on_eof (sub {
329	%state = ();
330	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
331	});
332		549
		550	# handle actual, non-tunneled, request
		551	my $handle_actual_request = sub {
		552	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		553
333	# send request	554	# send request
334	$state{handle}->push_write (	555	$state{handle}->push_write (
335	"$method $rpath HTTP/1.0\015\012"	556	"$method $rpath HTTP/1.1\015\012"
336	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)	557	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
337	. "\015\012"	558	. "\015\012"
338	. (delete $arg{body})	559	. (delete $arg{body})
339	);
340
341	%hdr = (); # reduce memory usage, save a kitten
342
343	# status line
344	$state{handle}->push_read (line => qr/\015?\012/, sub {
345	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
346	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
347
348	my %hdr = ( # response headers
349	HTTPVersion => "\x00$1",
350	Status => "\x00$2",
351	Reason => "\x00$3",
352	);	560	);
353		561
354	# headers, could be optimized a bit	562	# return if error occured during push_write()
355	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {	563	return unless %state;
		564
		565	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
		566
		567	# status line and headers
		568	$state{read_response} = sub {
356	for ("$_[1]\012") {	569	for ("$_[1]") {
357	# we support spaces in field names, as lotus domino	570	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
358	# creates them.
359	$hdr{lc $1} .= "\x00$2"
360	while /\G
361	([^:\000-\037]+):
362	[\011\040]*
363	((?: [^\015\012]+ \| \015?\012[\011\040] )*)
364	\015?\012
365	/gxc;
366		571
		572	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc
		573	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
		574
		575	# 100 Continue handling
		576	# should not happen as we don't send expect: 100-continue,
		577	# but we handle it just in case.
		578	# since we send the request body regardless, if we get an error
		579	# we are out of-sync, which we currently do NOT handle correctly.
		580	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		581	if $2 eq 100;
		582
		583	push @pseudo,
		584	HTTPVersion => $1,
		585	Status => $2,
		586	Reason => $3,
367	/\G$/	587	;
		588
		589	my $hdr = parse_hdr
368	or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers" }));	590	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
		591
		592	%hdr = (%$hdr, @pseudo);
369	}	593	}
370		594
371	substr $_, 0, 1, ""	595	# redirect handling
372	for values %hdr;	596	# microsoft and other shitheads don't give a shit for following standards,
		597	# try to support some common forms of broken Location headers.
		598	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		599	$hdr{location} =~ s/^\.\/+//;
373		600
374	my $finish = sub {	601	my $url = "$rscheme://$uhost:$uport";
		602
		603	unless ($hdr{location} =~ s/^\///) {
		604	$url .= $upath;
		605	$url =~ s/\/[^\/]*$//;
		606	}
		607
		608	$hdr{location} = "$url/$hdr{location}";
		609	}
		610
		611	my $redirect;
		612
		613	if ($recurse) {
		614	my $status = $hdr{Status};
		615
		616	# industry standard is to redirect POST as GET for
		617	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
		618	# also, the UA should ask the user for 301 and 307 and POST,
		619	# industry standard seems to be to simply follow.
		620	# we go with the industry standard.
		621	if ($status == 301 or $status == 302 or $status == 303) {
		622	# HTTP/1.1 is unclear on how to mutate the method
		623	$method = "GET" unless $method eq "HEAD";
		624	$redirect = 1;
		625	} elsif ($status == 307) {
		626	$redirect = 1;
		627	}
		628	}
		629
		630	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
		631	my $keepalive = pop;
		632
		633	$state{handle}->destroy if $state{handle};
375	%state = ();	634	%state = ();
376		635
		636	if (defined $_[1]) {
		637	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		638	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		639	}
		640
377	# set-cookie processing	641	# set-cookie processing
378	if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {	642	if ($arg{cookie_jar}) {
379	for (split /\x00/, $hdr{"set-cookie"}) {	643	for ($hdr{"set-cookie"}) {
380	my ($cookie, @arg) = split /;\s*/;	644	# parse NAME=VALUE
381	my ($name, $value) = split /=/, $cookie, 2;	645	my @kv;
382	my %kv = (value => $value, map { split /=/, $_, 2 } @arg);	646
		647	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
		648	my $name = $1;
		649	my $value = $3;
		650
		651	unless ($value) {
		652	$value = $2;
		653	$value =~ s/\\(.)/$1/gs;
		654	}
		655
		656	push @kv, $name => $value;
		657
		658	last unless /\G\s*;/gc;
		659	}
		660
		661	last unless @kv;
		662
		663	my $name = shift @kv;
		664	my %kv = (value => shift @kv, @kv);
		665
		666	my $cdom;
		667	my $cpath = (delete $kv{path}) \|\| "/";
		668
		669	if (exists $kv{domain}) {
		670	$cdom = delete $kv{domain};
383		671
384	my $cdom = (delete $kv{domain}) \|\| $uhost;
385	my $cpath = (delete $kv{path}) \|\| "/";
386
387	$cdom =~ s/^.?/./; # make sure it starts with a "."	672	$cdom =~ s/^\.?/./; # make sure it starts with a "."
388		673
389	next if $cdom =~ /\.$/;	674	next if $cdom =~ /\.$/;
390		675
391	# this is not rfc-like and not netscape-like. go figure.	676	# this is not rfc-like and not netscape-like. go figure.
392	my $ndots = $cdom =~ y/.//;	677	my $ndots = $cdom =~ y/.//;
393	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	678	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		679	} else {
		680	$cdom = $uhost;
		681	}
394		682
395	# store it	683	# store it
396	$arg{cookie_jar}{version} = 1;	684	$arg{cookie_jar}{version} = 1;
397	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;	685	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		686
		687	redo if /\G\s*,/gc;
398	}	688	}
399	}	689	}
400		690
401	if ($_[1]{Status} =~ /^x30[12]$/ && $recurse) {	691	if ($redirect && exists $hdr{location}) {
402	# microsoft and other assholes don't give a shit for following standards,	692	# we ignore any errors, as it is very common to receive
403	# try to support a common form of broken Location header.	693	# Content-Length != 0 but no actual body
404	$_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;	694	# we also access %hdr, as $_[1] might be an erro
405		695	http_request (
406	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);	696	$method => $hdr{location},
		697	%arg,
		698	recurse => $recurse - 1,
		699	Redirect => [$_[0], \%hdr],
		700	$cb);
407	} else {	701	} else {
408	$cb->($_[0], $_[1]);	702	$cb->($_[0], \%hdr);
409	}	703	}
410	};	704	};
411		705
412	if ($hdr{Status} =~ /^(?:1..\|204\|304)$/ or $method eq "HEAD") {	706	my $len = $hdr{"content-length"};
		707
		708	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		709	$finish->(undef, 598 => "Request cancelled by on_header");
		710	} elsif (
		711	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		712	or $method eq "HEAD"
		713	or (defined $len && !$len)
		714	) {
		715	# no body
413	$finish->(undef, \%hdr);	716	$finish->("", undef, undef, 1);
414	} else {	717	} else {
415	if (exists $hdr{"content-length"}) {	718	# body handling, many different code paths
		719	# - no body expected
		720	# - want_body_handle
		721	# - te chunked
		722	# - 2x length known (with or without on_body)
		723	# - 2x length not known (with or without on_body)
		724	if (!$redirect && $arg{want_body_handle}) {
		725	$_[0]->on_eof (undef);
		726	$_[0]->on_error (undef);
		727	$_[0]->on_read (undef);
		728
		729	$finish->(delete $state{handle});
		730
		731	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
		732	my $cl = 0;
		733	my $body = undef;
		734	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		735
		736	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		737
		738	my $read_chunk; $read_chunk = sub {
		739	$_[1] =~ /^([0-9a-fA-F]+)/
		740	or $finish->(undef, 599 => "Garbled chunked transfer encoding");
		741
		742	my $len = hex $1;
		743
		744	if ($len) {
		745	$cl += $len;
		746
416	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	747	$_[0]->push_read (chunk => $len, sub {
417	# could cache persistent connection now	748	$on_body->($_[1], \%hdr)
418	if ($hdr{connection} =~ /\bkeep-alive\b/i) {	749	or return $finish->(undef, 598 => "Request cancelled by on_body");
419	# but we don't, due to misdesigns, this is annoyingly complex	750
		751	$_[0]->push_read (line => sub {
		752	length $_[1]
		753	and return $finish->(undef, 599 => "Garbled chunked transfer encoding");
		754	$_[0]->push_read (line => $read_chunk);
		755	});
		756	});
		757	} else {
		758	$hdr{"content-length"} \|\|= $cl;
		759
		760	$_[0]->push_read (line => $qr_nlnl, sub {
		761	if (length $_[1]) {
		762	for ("$_[1]") {
		763	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		764
		765	my $hdr = parse_hdr
		766	or return $finish->(undef, 599 => "Garbled response trailers");
		767
		768	%hdr = (%hdr, %$hdr);
		769	}
		770	}
		771
		772	$finish->($body, undef, undef, 1);
		773	});
		774	}
		775	};
		776
		777	$_[0]->push_read (line => $read_chunk);
		778
		779	} elsif ($arg{on_body}) {
		780	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		781
		782	if ($len) {
		783	$_[0]->on_read (sub {
		784	$len -= length $_[0]{rbuf};
		785
		786	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		787	or return $finish->(undef, 598 => "Request cancelled by on_body");
		788
		789	$len > 0
		790	or $finish->("", undef, undef, 1);
420	};	791	});
421		792	} else {
		793	$_[0]->on_eof (sub {
422	$finish->($_[1], \%hdr);	794	$finish->("");
		795	});
		796	$_[0]->on_read (sub {
		797	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		798	or $finish->(undef, 598 => "Request cancelled by on_body");
		799	});
423	});	800	}
424	} else {	801	} else {
425	# too bad, need to read until we get an error or EOF,
426	# no way to detect winged data.
427	$_[0]->on_error (sub {
428	$finish->($_[0]{rbuf}, \%hdr);
429	});
430	$_[0]->on_eof (undef);	802	$_[0]->on_eof (undef);
		803
		804	if ($len) {
		805	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		806	$_[0]->on_read (sub {
		807	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		808	if $len <= length $_[0]{rbuf};
		809	});
		810	} else {
		811	$_[0]->on_error (sub {
		812	($! == Errno::EPIPE \|\| !$!)
		813	? $finish->(delete $_[0]{rbuf})
		814	: $finish->(undef, 599 => $_[2]);
		815	});
431	$_[0]->on_read (sub { });	816	$_[0]->on_read (sub { });
		817	}
432	}	818	}
433	}	819	}
		820	};
		821
		822	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
		823	};
		824
		825	# now handle proxy-CONNECT method
		826	if ($proxy && $uscheme eq "https") {
		827	# oh dear, we have to wrap it into a connect request
		828
		829	# maybe re-use $uauthority with patched port?
		830	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		831	$state{handle}->push_read (line => $qr_nlnl, sub {
		832	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		833	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
		834
		835	if ($2 == 200) {
		836	$rpath = $upath;
		837	&$handle_actual_request;
		838	} else {
		839	%state = ();
		840	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
		841	}
434	});	842	});
		843	} else {
		844	&$handle_actual_request;
435	});	845	}
436	}, sub {
437	$timeout
438	};	846	};
		847
		848	my $tcp_connect = $arg{tcp_connect}
		849	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		850
		851	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		852
439	};	853	};
440		854
441	defined wantarray && AnyEvent::Util::guard { %state = () }	855	defined wantarray && AnyEvent::Util::guard { %state = () }
442	}	856	}
443		857
444	sub http_get($$;@) {	858	sub http_get($@) {
445	unshift @_, "GET";	859	unshift @_, "GET";
446	&http_request	860	&http_request
447	}	861	}
448		862
449	sub http_head($$;@) {	863	sub http_head($@) {
450	unshift @_, "HEAD";	864	unshift @_, "HEAD";
451	&http_request	865	&http_request
452	}	866	}
453		867
454	sub http_post($$$;@) {	868	sub http_post($$@) {
		869	my $url = shift;
455	unshift @_, "POST", "body";	870	unshift @_, "POST", $url, "body";
456	&http_request	871	&http_request
457	}	872	}
458		873
459	=back	874	=back
460		875
		876	=head2 DNS CACHING
		877
		878	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		879	the actual connection, which in turn uses AnyEvent::DNS to resolve
		880	hostnames. The latter is a simple stub resolver and does no caching
		881	on its own. If you want DNS caching, you currently have to provide
		882	your own default resolver (by storing a suitable resolver object in
		883	C<$AnyEvent::DNS::RESOLVER>).
		884
461	=head2 GLOBAL FUNCTIONS AND VARIABLES	885	=head2 GLOBAL FUNCTIONS AND VARIABLES
462		886
463	=over 4	887	=over 4
464		888
465	=item AnyEvent::HTTP::set_proxy "proxy-url"	889	=item AnyEvent::HTTP::set_proxy "proxy-url"
466		890
467	Sets the default proxy server to use. The proxy-url must begin with a	891	Sets the default proxy server to use. The proxy-url must begin with a
468	string of the form C<http://host:port> (optionally C<https:...>).	892	string of the form C<http://host:port> (optionally C<https:...>), croaks
		893	otherwise.
		894
		895	To clear an already-set proxy, use C<undef>.
		896
		897	=item $date = AnyEvent::HTTP::format_date $timestamp
		898
		899	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		900	Date (RFC 2616).
		901
		902	=item $timestamp = AnyEvent::HTTP::parse_date $date
		903
		904	Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX
		905	timestamp, or C<undef> if the date cannot be parsed.
469		906
470	=item $AnyEvent::HTTP::MAX_RECURSE	907	=item $AnyEvent::HTTP::MAX_RECURSE
471		908
472	The default value for the C<recurse> request parameter (default: C<10>).	909	The default value for the C<recurse> request parameter (default: C<10>).
473		910
474	=item $AnyEvent::HTTP::USERAGENT	911	=item $AnyEvent::HTTP::USERAGENT
475		912
476	The default value for the C<User-Agent> header (the default is	913	The default value for the C<User-Agent> header (the default is
477	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	914	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
478		915
479	=item $AnyEvent::HTTP::MAX_PERSISTENT	916	=item $AnyEvent::HTTP::MAX_PER_HOST
480		917
481	The maximum number of persistent connections to keep open (default: 8).	918	The maximum number of concurrent connections to the same host (identified
		919	by the hostname). If the limit is exceeded, then the additional requests
		920	are queued until previous connections are closed.
482		921
483	Not implemented currently.	922	The default value for this is C<4>, and it is highly advisable to not
		923	increase it.
484		924
485	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	925	=item $AnyEvent::HTTP::ACTIVE
486		926
487	The maximum time to cache a persistent connection, in seconds (default: 2).	927	The number of active connections. This is not the number of currently
488		928	running requests, but the number of currently open and non-idle TCP
489	Not implemented currently.	929	connections. This number of can be useful for load-leveling.
490		930
491	=back	931	=back
492		932
493	=cut	933	=cut
494		934
		935	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		936	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		937
		938	sub format_date($) {
		939	my ($time) = @_;
		940
		941	# RFC 822/1123 format
		942	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		943
		944	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		945	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		946	$H, $M, $S;
		947	}
		948
		949	sub parse_date($) {
		950	my ($date) = @_;
		951
		952	my ($d, $m, $y, $H, $M, $S);
		953
		954	if ($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$/) {
		955	# RFC 822/1123, required by RFC 2616
		956	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		957
		958	} elsif ($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$/) {
		959	# RFC 850
		960	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		961
		962	} elsif ($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])$/) {
		963	# ISO C's asctime
		964	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		965	}
		966	# other formats fail in the loop below
		967
		968	for (0..11) {
		969	if ($m eq $month[$_]) {
		970	require Time::Local;
		971	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		972	}
		973	}
		974
		975	undef
		976	}
		977
495	sub set_proxy($) {	978	sub set_proxy($) {
		979	if (length $_[0]) {
496	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	980	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		981	or Carp::croak "$_[0]: invalid proxy URL";
		982	$PROXY = [$2, $3 \|\| 3128, $1]
		983	} else {
		984	undef $PROXY;
		985	}
497	}	986	}
498		987
499	# initialise proxy from environment	988	# initialise proxy from environment
		989	eval {
500	set_proxy $ENV{http_proxy};	990	set_proxy $ENV{http_proxy};
		991	};
		992
		993	=head2 SOCKS PROXIES
		994
		995	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		996	compile your perl to support socks, or use an external program such as
		997	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		998	transparently.
		999
		1000	Alternatively, for AnyEvent::HTTP only, you can use your own
		1001	C<tcp_connect> function that does the proxy handshake - here is an example
		1002	that works with socks4a proxies:
		1003
		1004	use Errno;
		1005	use AnyEvent::Util;
		1006	use AnyEvent::Socket;
		1007	use AnyEvent::Handle;
		1008
		1009	# host, port and username of/for your socks4a proxy
		1010	my $socks_host = "10.0.0.23";
		1011	my $socks_port = 9050;
		1012	my $socks_user = "";
		1013
		1014	sub socks4a_connect {
		1015	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		1016
		1017	my $hdl = new AnyEvent::Handle
		1018	connect => [$socks_host, $socks_port],
		1019	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1020	on_error => sub { $connect_cb->() },
		1021	;
		1022
		1023	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1024
		1025	$hdl->push_read (chunk => 8, sub {
		1026	my ($hdl, $chunk) = @_;
		1027	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1028
		1029	if ($status == 0x5a) {
		1030	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1031	} else {
		1032	$! = Errno::ENXIO; $connect_cb->();
		1033	}
		1034	});
		1035
		1036	$hdl
		1037	}
		1038
		1039	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1040	possibly after switching off other proxy types:
		1041
		1042	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1043
		1044	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1045	my ($data, $headers) = @_;
		1046	...
		1047	};
501		1048
502	=head1 SEE ALSO	1049	=head1 SEE ALSO
503		1050
504	L<AnyEvent>.	1051	L<AnyEvent>.
505		1052
506	=head1 AUTHOR	1053	=head1 AUTHOR
507		1054
508	Marc Lehmann <schmorp@schmorp.de>	1055	Marc Lehmann <schmorp@schmorp.de>
509	http://home.schmorp.de/	1056	http://home.schmorp.de/
		1057
		1058	With many thanks to Дмитрий Шалашов, who provided countless
		1059	testcases and bugreports.
510		1060
511	=cut	1061	=cut
512		1062
513	1	1063	1
514		1064

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.11 by root, Thu Jun 5 15:34:00 2008 UTC vs. Revision 1.68 by root, Fri Dec 31 19:22:18 2010 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.11 by root, Thu Jun 5 15:34:00 2008 UTC vs.
Revision 1.68 by root, Fri Dec 31 19:22:18 2010 UTC