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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.10 by root, Thu Jun 5 13:06:43 2008 UTC vs.
Revision 1.69 by root, Fri Dec 31 19:32:47 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.
13		17
		18	This module implements a simple, stateless and non-blocking HTTP
		19	client. It supports GET, POST and other request methods, cookies and more,
		20	all on a very low level. It can follow redirects supports proxies and
		21	automatically limits the number of connections to the values specified in
		22	the RFC.
		23
		24	It should generally be a "good client" that is enough for most HTTP
		25	tasks. Simple tasks should be simple, but complex tasks should still be
		26	possible as the user retains control over request and response headers.
		27
		28	The caller is responsible for authentication management, cookies (if
		29	the simplistic implementation in this module doesn't suffice), referer
		30	and other high-level protocol details for which this module offers only
		31	limited support.
		32
14	=head2 METHODS	33	=head2 METHODS
15		34
16	=over 4	35	=over 4
17		36
18	=cut	37	=cut
…		…
20	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
21		40
22	use strict;	41	use strict;
23	no warnings;	42	no warnings;
24		43
25	use Carp;	44	use Errno ();
26		45
27	use AnyEvent ();	46	use AnyEvent 5.0 ();
28	use AnyEvent::Util ();	47	use AnyEvent::Util ();
29	use AnyEvent::Socket ();
30	use AnyEvent::Handle ();	48	use AnyEvent::Handle ();
31		49
32	use base Exporter::;	50	use base Exporter::;
33		51
34	our $VERSION = '1.0';	52	our $VERSION = '1.5';
35		53
36	our @EXPORT = qw(http_get http_request);	54	our @EXPORT = qw(http_get http_post http_head http_request);
37		55
38	our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	56	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
39	our $MAX_RECURSE = 10;	57	our $MAX_RECURSE = 10;
40	our $MAX_PERSISTENT = 8;	58	our $MAX_PERSISTENT = 8;
41	our $PERSISTENT_TIMEOUT = 2;	59	our $PERSISTENT_TIMEOUT = 2;
42	our $TIMEOUT = 300;	60	our $TIMEOUT = 300;
43		61
44	# changing these is evil	62	# changing these is evil
45	our $MAX_PERSISTENT_PER_HOST = 2;	63	our $MAX_PERSISTENT_PER_HOST = 0;
46	our $MAX_PER_HOST = 4; # not respected yet :(	64	our $MAX_PER_HOST = 4;
47		65
48	our $PROXY;	66	our $PROXY;
		67	our $ACTIVE = 0;
49		68
50	my %KA_COUNT; # number of open keep-alive connections per host	69	my %KA_COUNT; # number of open keep-alive connections per host
		70	my %CO_SLOT; # number of open connections, and wait queue, per host
51		71
52	=item http_get $url, key => value..., $cb->($data, $headers)	72	=item http_get $url, key => value..., $cb->($data, $headers)
53		73
54	Executes an HTTP-GET request. See the http_request function for details on	74	Executes an HTTP-GET request. See the http_request function for details on
55	additional parameters.	75	additional parameters and the return value.
56		76
57	=item http_head $url, key => value..., $cb->($data, $headers)	77	=item http_head $url, key => value..., $cb->($data, $headers)
58		78
59	Executes an HTTP-HEAD request. See the http_request function for details on	79	Executes an HTTP-HEAD request. See the http_request function for details
60	additional parameters.	80	on additional parameters and the return value.
61		81
62	=item http_post $url, $body, key => value..., $cb->($data, $headers)	82	=item http_post $url, $body, key => value..., $cb->($data, $headers)
63		83
64	Executes an HTTP-POST request with a request body of C<$bod>. See the	84	Executes an HTTP-POST request with a request body of C<$body>. See the
65	http_request function for details on additional parameters.	85	http_request function for details on additional parameters and the return
		86	value.
66		87
67	=item http_request $method => $url, key => value..., $cb->($data, $headers)	88	=item http_request $method => $url, key => value..., $cb->($data, $headers)
68		89
69	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL	90	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
70	must be an absolute http or https URL.	91	must be an absolute http or https URL.
71		92
		93	When called in void context, nothing is returned. In other contexts,
		94	C<http_request> returns a "cancellation guard" - you have to keep the
		95	object at least alive until the callback get called. If the object gets
		96	destroyed before the callback is called, the request will be cancelled.
		97
72	The callback will be called with the response data as first argument	98	The callback will be called with the response body data as first argument
73	(or C<undef> if it wasn't available due to errors), and a hash-ref with	99	(or C<undef> if an error occured), and a hash-ref with response headers
74	response headers as second argument.	100	(and trailers) as second argument.
75		101
76	All the headers in that hash are lowercased. In addition to the response	102	All the headers in that hash are lowercased. In addition to the response
77	headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and	103	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
78	C<Reason> contain the three parts of the HTTP Status-Line of the same	104	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
		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	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		121	response, and so on.
		122
79	name. If the server sends a header multiple lines, then their contents	123	If the server sends a header multiple times, then their contents will be
80	will be joined together with C<\x00>.	124	joined together with a comma (C<,>), as per the HTTP spec.
81		125
82	If an internal error occurs, such as not being able to resolve a hostname,	126	If an internal error occurs, such as not being able to resolve a hostname,
83	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	127	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
84	and the C<Reason> pseudo-header will contain an error message.	128	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		129	message.
85		130
86	A typical callback might look like this:	131	A typical callback might look like this:
87		132
88	sub {	133	sub {
89	my ($body, $hdr) = @_;	134	my ($body, $hdr) = @_;
…		…
105	Whether to recurse requests or not, e.g. on redirects, authentication	150	Whether to recurse requests or not, e.g. on redirects, authentication
106	retries and so on, and how often to do so.	151	retries and so on, and how often to do so.
107		152
108	=item headers => hashref	153	=item headers => hashref
109		154
110	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 at least for C<TE:>, C<Referer:> and C<User-Agent:>
		158	(this can be suppressed by using C<undef> for these headers in which case
		159	they won't be sent at all).
111		160
112	=item timeout => $seconds	161	=item timeout => $seconds
113		162
114	The time-out to use for various stages - each connect attempt will reset	163	The time-out to use for various stages - each connect attempt will reset
115	the timeout, as will read or write activity. Default timeout is 5 minutes.	164	the timeout, as will read or write activity, i.e. this is not an overall
		165	timeout.
		166
		167	Default timeout is 5 minutes.
116		168
117	=item proxy => [$host, $port[, $scheme]] or undef	169	=item proxy => [$host, $port[, $scheme]] or undef
118		170
119	Use the given http proxy for all requests. If not specified, then the	171	Use the given http proxy for all requests. If not specified, then the
120	default proxy (as specified by C<$ENV{http_proxy}>) is used.	172	default proxy (as specified by C<$ENV{http_proxy}>) is used.
121		173
122	C<$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
123	HTTPS.	175	HTTPS.
124		176
125	=item body => $string	177	=item body => $string
126		178
127	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
128	this module might offer more options).	180	this module might offer more options).
129		181
130	=item cookie_jar => $hash_ref	182	=item cookie_jar => $hash_ref
131		183
132	Passing this parameter enables (simplified) cookie-processing, loosely	184	Passing this parameter enables (simplified) cookie-processing, loosely
133	based on the original netscape specification.	185	based on the original netscape specification.
134		186
135	The C<$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
136	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
137	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
138	recommended, as expire times are currently being ignored.	190	recommended, as expiry times are currently being ignored.
139		191
140	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
141	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
142	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
143	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
144	them unless required to.	196	them unless required to.
145		197
		198	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
		199	headers will be ste and handled by this module, otherwise they will be
		200	left untouched.
		201
		202	=item tls_ctx => $scheme \| $tls_ctx
		203
		204	Specifies the AnyEvent::TLS context to be used for https connections. This
		205	parameter follows the same rules as the C<tls_ctx> parameter to
		206	L<AnyEvent::Handle>, but additionally, the two strings C<low> or
		207	C<high> can be specified, which give you a predefined low-security (no
		208	verification, highest compatibility) and high-security (CA and common-name
		209	verification) TLS context.
		210
		211	The default for this option is C<low>, which could be interpreted as "give
		212	me the page, no matter what".
		213
		214	=item on_prepare => $callback->($fh)
		215
		216	In rare cases you need to "tune" the socket before it is used to
		217	connect (for exmaple, to bind it on a given IP address). This parameter
		218	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		219	and behaves exactly the same way (e.g. it has to provide a
		220	timeout). See the description for the C<$prepare_cb> argument of
		221	C<AnyEvent::Socket::tcp_connect> for details.
		222
		223	=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
		224
		225	In even rarer cases you want total control over how AnyEvent::HTTP
		226	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
		227	to do this, but you can provide your own C<tcp_connect> function -
		228	obviously, it has to follow the same calling conventions, except that it
		229	may always return a connection guard object.
		230
		231	There are probably lots of weird uses for this function, starting from
		232	tracing the hosts C<http_request> actually tries to connect, to (inexact
		233	but fast) host => IP address caching or even socks protocol support.
		234
		235	=item on_header => $callback->($headers)
		236
		237	When specified, this callback will be called with the header hash as soon
		238	as headers have been successfully received from the remote server (not on
		239	locally-generated errors).
		240
		241	It has to return either true (in which case AnyEvent::HTTP will continue),
		242	or false, in which case AnyEvent::HTTP will cancel the download (and call
		243	the finish callback with an error code of C<598>).
		244
		245	This callback is useful, among other things, to quickly reject unwanted
		246	content, which, if it is supposed to be rare, can be faster than first
		247	doing a C<HEAD> request.
		248
		249	The downside is that cancelling the request makes it impossible to re-use
		250	the connection. Also, the C<on_header> callback will not receive any
		251	trailer (headers sent after the response body).
		252
		253	Example: cancel the request unless the content-type is "text/html".
		254
		255	on_header => sub {
		256	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		257	},
		258
		259	=item on_body => $callback->($partial_body, $headers)
		260
		261	When specified, all body data will be passed to this callback instead of
		262	to the completion callback. The completion callback will get the empty
		263	string instead of the body data.
		264
		265	It has to return either true (in which case AnyEvent::HTTP will continue),
		266	or false, in which case AnyEvent::HTTP will cancel the download (and call
		267	the completion callback with an error code of C<598>).
		268
		269	The downside to cancelling the request is that it makes it impossible to
		270	re-use the connection.
		271
		272	This callback is useful when the data is too large to be held in memory
		273	(so the callback writes it to a file) or when only some information should
		274	be extracted, or when the body should be processed incrementally.
		275
		276	It is usually preferred over doing your own body handling via
		277	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		278	only used to create a connection, C<want_body_handle> is the better
		279	alternative, as it allows you to install your own event handler, reducing
		280	resource usage.
		281
		282	=item want_body_handle => $enable
		283
		284	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		285	changes considerably: after parsing the headers, and instead of
		286	downloading the body (if any), the completion callback will be
		287	called. Instead of the C<$body> argument containing the body data, the
		288	callback will receive the L<AnyEvent::Handle> object associated with the
		289	connection. In error cases, C<undef> will be passed. When there is no body
		290	(e.g. status C<304>), the empty string will be passed.
		291
		292	The handle object might or might not be in TLS mode, might be connected to
		293	a proxy, be a persistent connection etc., and configured in unspecified
		294	ways. The user is responsible for this handle (it will not be used by this
		295	module anymore).
		296
		297	This is useful with some push-type services, where, after the initial
		298	headers, an interactive protocol is used (typical example would be the
		299	push-style twitter API which starts a JSON/XML stream).
		300
		301	If you think you need this, first have a look at C<on_body>, to see if
		302	that doesn't solve your problem in a better way.
		303
146	=back	304	=back
147		305
148	Example: make a simple HTTP GET request for http://www.nethype.de/	306	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		307	the response body.
149		308
150	http_request GET => "http://www.nethype.de/", sub {	309	http_request GET => "http://www.nethype.de/", sub {
151	my ($body, $hdr) = @_;	310	my ($body, $hdr) = @_;
152	print "$body\n";	311	print "$body\n";
153	};	312	};
154		313
155	Example: make a HTTP HEAD request on https://www.google.com/, use a	314	Example: do a HTTP HEAD request on https://www.google.com/, use a
156	timeout of 30 seconds.	315	timeout of 30 seconds.
157		316
158	http_request	317	http_request
159	GET => "https://www.google.com",	318	GET => "https://www.google.com",
160	timeout => 30,	319	timeout => 30,
…		…
163	use Data::Dumper;	322	use Data::Dumper;
164	print Dumper $hdr;	323	print Dumper $hdr;
165	}	324	}
166	;	325	;
167		326
		327	Example: do another simple HTTP GET request, but immediately try to
		328	cancel it.
		329
		330	my $request = http_request GET => "http://www.nethype.de/", sub {
		331	my ($body, $hdr) = @_;
		332	print "$body\n";
		333	};
		334
		335	undef $request;
		336
168	=cut	337	=cut
169		338
		339	sub _slot_schedule;
		340	sub _slot_schedule($) {
		341	my $host = shift;
		342
		343	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
		344	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
		345	# somebody wants that slot
		346	++$CO_SLOT{$host}[0];
		347	++$ACTIVE;
		348
		349	$cb->(AnyEvent::Util::guard {
		350	--$ACTIVE;
		351	--$CO_SLOT{$host}[0];
		352	_slot_schedule $host;
		353	});
		354	} else {
		355	# nobody wants the slot, maybe we can forget about it
		356	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
		357	last;
		358	}
		359	}
		360	}
		361
		362	# wait for a free slot on host, call callback
		363	sub _get_slot($$) {
		364	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
		365
		366	_slot_schedule $_[0];
		367	}
		368
		369	# continue to parse $_ for headers and place them into the arg
		370	sub parse_hdr() {
		371	my %hdr;
		372
		373	# things seen, not parsed:
		374	# p3pP="NON CUR OTPi OUR NOR UNI"
		375
		376	$hdr{lc $1} .= ",$2"
		377	while /\G
		378	([^:\000-\037]*):
		379	[\011\040]*
		380	((?: [^\012]+ \| \012[\011\040] )*)
		381	\012
		382	/gxc;
		383
		384	/\G$/
		385	or return;
		386
		387	# remove the "," prefix we added to all headers above
		388	substr $_, 0, 1, ""
		389	for values %hdr;
		390
		391	\%hdr
		392	}
		393
		394	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		395
		396	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		397	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		398
170	sub http_request($$$;@) {	399	sub http_request($$@) {
171	my $cb = pop;	400	my $cb = pop;
172	my ($method, $url, %arg) = @_;	401	my ($method, $url, %arg) = @_;
173		402
174	my %hdr;	403	my %hdr;
		404
		405	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		406	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
175		407
176	$method = uc $method;	408	$method = uc $method;
177		409
178	if (my $hdr = $arg{headers}) {	410	if (my $hdr = $arg{headers}) {
179	while (my ($k, $v) = each %$hdr) {	411	while (my ($k, $v) = each %$hdr) {
180	$hdr{lc $k} = $v;	412	$hdr{lc $k} = $v;
181	}	413	}
182	}	414	}
183		415
		416	# pseudo headers for all subsequent responses
		417	my @pseudo = (URL => $url);
		418	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		419
184	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;	420	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
185		421
186	return $cb->(undef, { Status => 599, Reason => "recursion limit reached" })	422	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
187	if $recurse < 0;	423	if $recurse < 0;
188		424
189	my $proxy = $arg{proxy} \|\| $PROXY;	425	my $proxy = $arg{proxy} \|\| $PROXY;
190	my $timeout = $arg{timeout} \|\| $TIMEOUT;	426	my $timeout = $arg{timeout} \|\| $TIMEOUT;
191		427
192	$hdr{"user-agent"} \|\|= $USERAGENT;
193
194	my ($scheme, $authority, $upath, $query, $fragment) =	428	my ($uscheme, $uauthority, $upath, $query, $fragment) =
195	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	429	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
196		430
197	$scheme = lc $scheme;	431	$uscheme = lc $uscheme;
198		432
199	my $uport = $scheme eq "http" ? 80	433	my $uport = $uscheme eq "http" ? 80
200	: $scheme eq "https" ? 443	434	: $uscheme eq "https" ? 443
201	: return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported" });	435	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
202		436
203	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	437	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
204	or return $cb->(undef, { Status => 599, Reason => "unparsable URL" });	438	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
205		439
206	my $uhost = $1;	440	my $uhost = $1;
207	$uport = $2 if defined $2;	441	$uport = $2 if defined $2;
208		442
		443	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		444	unless exists $hdr{host};
		445
209	$uhost =~ s/^\[(.*)\]$/$1/;	446	$uhost =~ s/^\[(.*)\]$/$1/;
210	$upath .= "?$query" if length $query;	447	$upath .= $query if length $query;
211		448
212	$upath =~ s%^/?%/%;	449	$upath =~ s%^/?%/%;
213		450
214	# cookie processing	451	# cookie processing
215	if (my $jar = $arg{cookie_jar}) {	452	if (my $jar = $arg{cookie_jar}) {
216	%$jar = () if $jar->{version} < 1;	453	%$jar = () if $jar->{version} != 1;
217		454
218	my @cookie;	455	my @cookie;
219		456
220	while (my ($chost, $v) = each %$jar) {	457	while (my ($chost, $v) = each %$jar) {
		458	if ($chost =~ /^\./) {
221	next unless $chost eq substr $uhost, -length $chost;	459	next unless $chost eq substr $uhost, -length $chost;
222	next unless $chost =~ /^\./;	460	} elsif ($chost =~ /\./) {
		461	next unless $chost eq $uhost;
		462	} else {
		463	next;
		464	}
223		465
224	while (my ($cpath, $v) = each %$v) {	466	while (my ($cpath, $v) = each %$v) {
225	next unless $cpath eq substr $upath, 0, length $cpath;	467	next unless $cpath eq substr $upath, 0, length $cpath;
226		468
227	while (my ($k, $v) = each %$v) {	469	while (my ($k, $v) = each %$v) {
228	next if $scheme ne "https" && exists $v->{secure};	470	next if $uscheme ne "https" && exists $v->{secure};
		471	my $value = $v->{value};
		472	$value =~ s/([\\"])/\\$1/g;
229	push @cookie, "$k=$v->{value}";	473	push @cookie, "$k=\"$value\"";
230	}	474	}
231	}	475	}
232	}	476	}
233		477
234	$hdr{cookie} = join "; ", @cookie	478	$hdr{cookie} = join "; ", @cookie
235	if @cookie;	479	if @cookie;
236	}	480	}
237		481
238	my ($rhost, $rport, $rpath); # request host, port, path	482	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
239		483
240	if ($proxy) {	484	if ($proxy) {
241	($rhost, $rport, $scheme) = @$proxy;	485	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
242	$rpath = $url;	486
		487	$rscheme = "http" unless defined $rscheme;
		488
		489	# don't support https requests over https-proxy transport,
		490	# can't be done with tls as spec'ed, unless you double-encrypt.
		491	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
243	} else {	492	} else {
244	($rhost, $rport, $rpath) = ($uhost, $uport, $upath);	493	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
245	$hdr{host} = $uhost;
246	}	494	}
247		495
		496	# leave out fragment and query string, just a heuristic
		497	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		498	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
		499
248	$hdr{"content-length"} = length $arg{body};	500	$hdr{"content-length"} = length $arg{body}
		501	if length $arg{body} \|\| $method ne "GET";
249		502
250	my %state;	503	$hdr{connection} = "close TE"; #1.1
		504	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
251		505
252	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	506	my %state = (connect_guard => 1);
		507
		508	_get_slot $uhost, sub {
		509	$state{slot_guard} = shift;
		510
		511	return unless $state{connect_guard};
		512
		513	my $connect_cb = sub {
253	$state{fh} = shift	514	$state{fh} = shift
254	or return $cb->(undef, { Status => 599, Reason => "$!" });
255
256	delete $state{connect_guard}; # reduce memory usage, save a tree
257
258	# get handle
259	$state{handle} = new AnyEvent::Handle
260	fh => $state{fh},
261	($scheme eq "https" ? (tls => "connect") : ());
262
263	# limit the number of persistent connections
264	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
265	++$KA_COUNT{$_[1]};
266	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };
267	$hdr{connection} = "keep-alive";
268	delete $hdr{connection}; # keep-alive not yet supported
269	} else {
270	delete $hdr{connection};
271	}
272
273	# (re-)configure handle
274	$state{handle}->timeout ($timeout);
275	$state{handle}->on_error (sub {
276	%state = ();
277	$cb->(undef, { Status => 599, Reason => "$!" });
278	});
279	$state{handle}->on_eof (sub {
280	%state = ();
281	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
282	});
283
284	# send request
285	$state{handle}->push_write (
286	"$method $rpath HTTP/1.0\015\012"
287	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
288	. "\015\012"
289	. (delete $arg{body})
290	);
291
292	%hdr = (); # reduce memory usage, save a kitten
293
294	# status line
295	$state{handle}->push_read (line => qr/\015?\012/, sub {
296	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
297	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
298
299	my %hdr = ( # response headers
300	HTTPVersion => "\x00$1",
301	Status => "\x00$2",
302	Reason => "\x00$3",
303	);
304
305	# headers, could be optimized a bit
306	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
307	for ("$_[1]\012") {
308	# we support spaces in field names, as lotus domino
309	# creates them.
310	$hdr{lc $1} .= "\x00$2"
311	while /\G
312	([^:\000-\037]+):
313	[\011\040]*
314	((?: [^\015\012]+ \| \015?\012[\011\040] )*)
315	\015?\012
316	/gxc;
317
318	/\G$/
319	or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers" }));
320	}	515	or do {
321		516	my $err = "$!";
322	substr $_, 0, 1, ""
323	for values %hdr;
324
325	my $finish = sub {
326	%state = ();	517	%state = ();
		518	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
		519	};
327		520
328	# set-cookie processing	521	pop; # free memory, save a tree
329	if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {	522
330	for (split /\x00/, $hdr{"set-cookie"}) {	523	return unless delete $state{connect_guard};
331	my ($cookie, @arg) = split /;\s*/;	524
332	my ($name, $value) = split /=/, $cookie, 2;	525	# get handle
333	my %kv = (value => $value, map { split /=/, $_, 2 } @arg);	526	$state{handle} = new AnyEvent::Handle
334		527	fh => $state{fh},
335	my $cdom = (delete $kv{domain}) \|\| $uhost;	528	peername => $rhost,
336	my $cpath = (delete $kv{path}) \|\| "/";	529	tls_ctx => $arg{tls_ctx},
337		530	# these need to be reconfigured on keepalive handles
338	$cdom =~ s/^.?/./; # make sure it starts with a "."	531	timeout => $timeout,
339		532	on_error => sub {
340	my $ndots = $cdom =~ y/.//;	533	%state = ();
341	next if $ndots < ($cdom =~ /[^.]{3}$/ ? 2 : 3);	534	$cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
342		535	},
		536	on_eof => sub {
		537	%state = ();
		538	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
		539	},
		540	;
		541
		542	# limit the number of persistent connections
		543	# keepalive not yet supported
		544	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
		545	# ++$KA_COUNT{$_[1]};
		546	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		547	# --$KA_COUNT{$_[1]}
		548	# };
		549	# $hdr{connection} = "keep-alive";
		550	# }
		551
		552	$state{handle}->starttls ("connect") if $rscheme eq "https";
		553
		554	# handle actual, non-tunneled, request
		555	my $handle_actual_request = sub {
		556	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		557
		558	# send request
		559	$state{handle}->push_write (
		560	"$method $rpath HTTP/1.1\015\012"
		561	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		562	. "\015\012"
		563	. (delete $arg{body})
		564	);
		565
		566	# return if error occured during push_write()
		567	return unless %state;
		568
		569	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
		570
		571	# status line and headers
		572	$state{read_response} = sub {
		573	for ("$_[1]") {
		574	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		575
		576	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc
		577	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
		578
		579	# 100 Continue handling
		580	# should not happen as we don't send expect: 100-continue,
		581	# but we handle it just in case.
		582	# since we send the request body regardless, if we get an error
		583	# we are out of-sync, which we currently do NOT handle correctly.
		584	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		585	if $2 eq 100;
		586
		587	push @pseudo,
		588	HTTPVersion => $1,
		589	Status => $2,
		590	Reason => $3,
		591	;
		592
		593	my $hdr = parse_hdr
		594	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
		595
		596	%hdr = (%$hdr, @pseudo);
		597	}
		598
		599	# redirect handling
		600	# microsoft and other shitheads don't give a shit for following standards,
		601	# try to support some common forms of broken Location headers.
		602	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		603	$hdr{location} =~ s/^\.\/+//;
		604
		605	my $url = "$rscheme://$uhost:$uport";
		606
		607	unless ($hdr{location} =~ s/^\///) {
		608	$url .= $upath;
		609	$url =~ s/\/[^\/]*$//;
		610	}
		611
		612	$hdr{location} = "$url/$hdr{location}";
		613	}
		614
		615	my $redirect;
		616
		617	if ($recurse) {
		618	my $status = $hdr{Status};
		619
		620	# industry standard is to redirect POST as GET for
		621	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
		622	# also, the UA should ask the user for 301 and 307 and POST,
		623	# industry standard seems to be to simply follow.
		624	# we go with the industry standard.
		625	if ($status == 301 or $status == 302 or $status == 303) {
		626	# HTTP/1.1 is unclear on how to mutate the method
		627	$method = "GET" unless $method eq "HEAD";
343	# store it	628	$redirect = 1;
344	$arg{cookie_jar}{version} = 1;	629	} elsif ($status == 307) {
345	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;	630	$redirect = 1;
346	}	631	}
347	}	632	}
348		633
349	if ($_[1]{Status} =~ /^x30[12]$/ && $recurse) {	634	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
350	# microsoft and other assholes don't give a shit for following standards,	635	my $keepalive = pop;
351	# try to support a common form of broken Location header.
352	$_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;
353		636
354	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);	637	$state{handle}->destroy if $state{handle};
		638	%state = ();
		639
		640	if (defined $_[1]) {
		641	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		642	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		643	}
		644
		645	# set-cookie processing
		646	if ($arg{cookie_jar}) {
		647	for ($hdr{"set-cookie"}) {
		648	# parse NAME=VALUE
		649	my @kv;
		650
		651	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
		652	my $name = $1;
		653	my $value = $3;
		654
		655	unless ($value) {
		656	$value = $2;
		657	$value =~ s/\\(.)/$1/gs;
		658	}
		659
		660	push @kv, $name => $value;
		661
		662	last unless /\G\s*;/gc;
		663	}
		664
		665	last unless @kv;
		666
		667	my $name = shift @kv;
		668	my %kv = (value => shift @kv, @kv);
		669
		670	my $cdom;
		671	my $cpath = (delete $kv{path}) \|\| "/";
		672
		673	if (exists $kv{domain}) {
		674	$cdom = delete $kv{domain};
		675
		676	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		677
		678	next if $cdom =~ /\.$/;
		679
		680	# this is not rfc-like and not netscape-like. go figure.
		681	my $ndots = $cdom =~ y/.//;
		682	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		683	} else {
		684	$cdom = $uhost;
		685	}
		686
		687	# store it
		688	$arg{cookie_jar}{version} = 1;
		689	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		690
		691	redo if /\G\s*,/gc;
		692	}
		693	}
		694
		695	if ($redirect && exists $hdr{location}) {
		696	# we ignore any errors, as it is very common to receive
		697	# Content-Length != 0 but no actual body
		698	# we also access %hdr, as $_[1] might be an erro
		699	http_request (
		700	$method => $hdr{location},
		701	%arg,
		702	recurse => $recurse - 1,
		703	Redirect => [$_[0], \%hdr],
		704	$cb);
		705	} else {
		706	$cb->($_[0], \%hdr);
		707	}
		708	};
		709
		710	my $len = $hdr{"content-length"};
		711
		712	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		713	$finish->(undef, 598 => "Request cancelled by on_header");
		714	} elsif (
		715	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		716	or $method eq "HEAD"
		717	or (defined $len && !$len)
		718	) {
		719	# no body
		720	$finish->("", undef, undef, 1);
355	} else {	721	} else {
356	$cb->($_[0], $_[1]);	722	# body handling, many different code paths
		723	# - no body expected
		724	# - want_body_handle
		725	# - te chunked
		726	# - 2x length known (with or without on_body)
		727	# - 2x length not known (with or without on_body)
		728	if (!$redirect && $arg{want_body_handle}) {
		729	$_[0]->on_eof (undef);
		730	$_[0]->on_error (undef);
		731	$_[0]->on_read (undef);
		732
		733	$finish->(delete $state{handle});
		734
		735	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
		736	my $cl = 0;
		737	my $body = undef;
		738	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		739
		740	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		741
		742	my $read_chunk; $read_chunk = sub {
		743	$_[1] =~ /^([0-9a-fA-F]+)/
		744	or $finish->(undef, 599 => "Garbled chunked transfer encoding");
		745
		746	my $len = hex $1;
		747
		748	if ($len) {
		749	$cl += $len;
		750
		751	$_[0]->push_read (chunk => $len, sub {
		752	$on_body->($_[1], \%hdr)
		753	or return $finish->(undef, 598 => "Request cancelled by on_body");
		754
		755	$_[0]->push_read (line => sub {
		756	length $_[1]
		757	and return $finish->(undef, 599 => "Garbled chunked transfer encoding");
		758	$_[0]->push_read (line => $read_chunk);
		759	});
		760	});
		761	} else {
		762	$hdr{"content-length"} \|\|= $cl;
		763
		764	$_[0]->push_read (line => $qr_nlnl, sub {
		765	if (length $_[1]) {
		766	for ("$_[1]") {
		767	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		768
		769	my $hdr = parse_hdr
		770	or return $finish->(undef, 599 => "Garbled response trailers");
		771
		772	%hdr = (%hdr, %$hdr);
		773	}
		774	}
		775
		776	$finish->($body, undef, undef, 1);
		777	});
		778	}
		779	};
		780
		781	$_[0]->push_read (line => $read_chunk);
		782
		783	} elsif ($arg{on_body}) {
		784	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		785
		786	if ($len) {
		787	$_[0]->on_read (sub {
		788	$len -= length $_[0]{rbuf};
		789
		790	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		791	or return $finish->(undef, 598 => "Request cancelled by on_body");
		792
		793	$len > 0
		794	or $finish->("", undef, undef, 1);
		795	});
		796	} else {
		797	$_[0]->on_eof (sub {
		798	$finish->("");
		799	});
		800	$_[0]->on_read (sub {
		801	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		802	or $finish->(undef, 598 => "Request cancelled by on_body");
		803	});
		804	}
		805	} else {
		806	$_[0]->on_eof (undef);
		807
		808	if ($len) {
		809	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		810	$_[0]->on_read (sub {
		811	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		812	if $len <= length $_[0]{rbuf};
		813	});
		814	} else {
		815	$_[0]->on_error (sub {
		816	($! == Errno::EPIPE \|\| !$!)
		817	? $finish->(delete $_[0]{rbuf})
		818	: $finish->(undef, 599 => $_[2]);
		819	});
		820	$_[0]->on_read (sub { });
		821	}
		822	}
357	}	823	}
358	};	824	};
359		825
360	if ($hdr{Status} =~ /^(?:1..\|204\|304)$/ or $method eq "HEAD") {	826	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
361	$finish->(undef, \%hdr);	827	};
362	} else {
363	if (exists $hdr{"content-length"}) {
364	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
365	# could cache persistent connection now
366	if ($hdr{connection} =~ /\bkeep-alive\b/i) {
367	# but we don't, due to misdesigns, this is annoyingly complex
368	};
369		828
370	$finish->($_[1], \%hdr);	829	# now handle proxy-CONNECT method
371	});	830	if ($proxy && $uscheme eq "https") {
		831	# oh dear, we have to wrap it into a connect request
		832
		833	# maybe re-use $uauthority with patched port?
		834	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		835	$state{handle}->push_read (line => $qr_nlnl, sub {
		836	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		837	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
		838
		839	if ($2 == 200) {
		840	$rpath = $upath;
		841	&$handle_actual_request;
372	} else {	842	} else {
373	# too bad, need to read until we get an error or EOF,
374	# no way to detect winged data.
375	$_[0]->on_error (sub {
376	$finish->($_[0]{rbuf}, \%hdr);
377	});	843	%state = ();
378	$_[0]->on_eof (undef);	844	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
379	$_[0]->on_read (sub { });
380	}	845	}
381	}	846	});
		847	} else {
		848	&$handle_actual_request;
382	});	849	}
383	});	850	};
384	}, sub {	851
385	$timeout	852	my $tcp_connect = $arg{tcp_connect}
		853	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		854
		855	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		856
386	};	857	};
387		858
388	defined wantarray && AnyEvent::Util::guard { %state = () }	859	defined wantarray && AnyEvent::Util::guard { %state = () }
389	}	860	}
390		861
391	sub http_get($$;@) {	862	sub http_get($@) {
392	unshift @_, "GET";	863	unshift @_, "GET";
393	&http_request	864	&http_request
394	}	865	}
395		866
396	sub http_head($$;@) {	867	sub http_head($@) {
397	unshift @_, "HEAD";	868	unshift @_, "HEAD";
398	&http_request	869	&http_request
399	}	870	}
400		871
401	sub http_post($$$;@) {	872	sub http_post($$@) {
		873	my $url = shift;
402	unshift @_, "POST", "body";	874	unshift @_, "POST", $url, "body";
403	&http_request	875	&http_request
404	}	876	}
405		877
406	=back	878	=back
407		879
		880	=head2 DNS CACHING
		881
		882	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		883	the actual connection, which in turn uses AnyEvent::DNS to resolve
		884	hostnames. The latter is a simple stub resolver and does no caching
		885	on its own. If you want DNS caching, you currently have to provide
		886	your own default resolver (by storing a suitable resolver object in
		887	C<$AnyEvent::DNS::RESOLVER>).
		888
408	=head2 GLOBAL FUNCTIONS AND VARIABLES	889	=head2 GLOBAL FUNCTIONS AND VARIABLES
409		890
410	=over 4	891	=over 4
411		892
412	=item AnyEvent::HTTP::set_proxy "proxy-url"	893	=item AnyEvent::HTTP::set_proxy "proxy-url"
413		894
414	Sets the default proxy server to use. The proxy-url must begin with a	895	Sets the default proxy server to use. The proxy-url must begin with a
415	string of the form C<http://host:port> (optionally C<https:...>).	896	string of the form C<http://host:port> (optionally C<https:...>), croaks
		897	otherwise.
		898
		899	To clear an already-set proxy, use C<undef>.
		900
		901	=item $date = AnyEvent::HTTP::format_date $timestamp
		902
		903	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		904	Date (RFC 2616).
		905
		906	=item $timestamp = AnyEvent::HTTP::parse_date $date
		907
		908	Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX
		909	timestamp, or C<undef> if the date cannot be parsed.
416		910
417	=item $AnyEvent::HTTP::MAX_RECURSE	911	=item $AnyEvent::HTTP::MAX_RECURSE
418		912
419	The default value for the C<recurse> request parameter (default: C<10>).	913	The default value for the C<recurse> request parameter (default: C<10>).
420		914
421	=item $AnyEvent::HTTP::USERAGENT	915	=item $AnyEvent::HTTP::USERAGENT
422		916
423	The default value for the C<User-Agent> header (the default is	917	The default value for the C<User-Agent> header (the default is
424	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	918	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
425		919
426	=item $AnyEvent::HTTP::MAX_PERSISTENT	920	=item $AnyEvent::HTTP::MAX_PER_HOST
427		921
428	The maximum number of persistent connections to keep open (default: 8).	922	The maximum number of concurrent connections to the same host (identified
		923	by the hostname). If the limit is exceeded, then the additional requests
		924	are queued until previous connections are closed.
429		925
430	Not implemented currently.	926	The default value for this is C<4>, and it is highly advisable to not
		927	increase it.
431		928
432	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	929	=item $AnyEvent::HTTP::ACTIVE
433		930
434	The maximum time to cache a persistent connection, in seconds (default: 2).	931	The number of active connections. This is not the number of currently
435		932	running requests, but the number of currently open and non-idle TCP
436	Not implemented currently.	933	connections. This number of can be useful for load-leveling.
437		934
438	=back	935	=back
439		936
440	=cut	937	=cut
441		938
		939	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		940	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		941
		942	sub format_date($) {
		943	my ($time) = @_;
		944
		945	# RFC 822/1123 format
		946	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		947
		948	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		949	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		950	$H, $M, $S;
		951	}
		952
		953	sub parse_date($) {
		954	my ($date) = @_;
		955
		956	my ($d, $m, $y, $H, $M, $S);
		957
		958	if ($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$/) {
		959	# RFC 822/1123, required by RFC 2616
		960	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		961
		962	} elsif ($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$/) {
		963	# RFC 850
		964	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		965
		966	} elsif ($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])$/) {
		967	# ISO C's asctime
		968	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		969	}
		970	# other formats fail in the loop below
		971
		972	for (0..11) {
		973	if ($m eq $month[$_]) {
		974	require Time::Local;
		975	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		976	}
		977	}
		978
		979	undef
		980	}
		981
442	sub set_proxy($) {	982	sub set_proxy($) {
		983	if (length $_[0]) {
443	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	984	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		985	or Carp::croak "$_[0]: invalid proxy URL";
		986	$PROXY = [$2, $3 \|\| 3128, $1]
		987	} else {
		988	undef $PROXY;
		989	}
444	}	990	}
445		991
446	# initialise proxy from environment	992	# initialise proxy from environment
		993	eval {
447	set_proxy $ENV{http_proxy};	994	set_proxy $ENV{http_proxy};
		995	};
		996
		997	=head2 SOCKS PROXIES
		998
		999	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		1000	compile your perl to support socks, or use an external program such as
		1001	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		1002	transparently.
		1003
		1004	Alternatively, for AnyEvent::HTTP only, you can use your own
		1005	C<tcp_connect> function that does the proxy handshake - here is an example
		1006	that works with socks4a proxies:
		1007
		1008	use Errno;
		1009	use AnyEvent::Util;
		1010	use AnyEvent::Socket;
		1011	use AnyEvent::Handle;
		1012
		1013	# host, port and username of/for your socks4a proxy
		1014	my $socks_host = "10.0.0.23";
		1015	my $socks_port = 9050;
		1016	my $socks_user = "";
		1017
		1018	sub socks4a_connect {
		1019	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		1020
		1021	my $hdl = new AnyEvent::Handle
		1022	connect => [$socks_host, $socks_port],
		1023	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1024	on_error => sub { $connect_cb->() },
		1025	;
		1026
		1027	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1028
		1029	$hdl->push_read (chunk => 8, sub {
		1030	my ($hdl, $chunk) = @_;
		1031	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1032
		1033	if ($status == 0x5a) {
		1034	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1035	} else {
		1036	$! = Errno::ENXIO; $connect_cb->();
		1037	}
		1038	});
		1039
		1040	$hdl
		1041	}
		1042
		1043	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1044	possibly after switching off other proxy types:
		1045
		1046	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1047
		1048	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1049	my ($data, $headers) = @_;
		1050	...
		1051	};
448		1052
449	=head1 SEE ALSO	1053	=head1 SEE ALSO
450		1054
451	L<AnyEvent>.	1055	L<AnyEvent>.
452		1056
453	=head1 AUTHOR	1057	=head1 AUTHOR
454		1058
455	Marc Lehmann <schmorp@schmorp.de>	1059	Marc Lehmann <schmorp@schmorp.de>
456	http://home.schmorp.de/	1060	http://home.schmorp.de/
		1061
		1062	With many thanks to Дмитрий Шалашов, who provided countless
		1063	testcases and bugreports.
457		1064
458	=cut	1065	=cut
459		1066
460	1	1067	1
461		1068

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.10 by root, Thu Jun 5 13:06:43 2008 UTC vs. Revision 1.69 by root, Fri Dec 31 19:32:47 2010 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.10 by root, Thu Jun 5 13:06:43 2008 UTC vs.
Revision 1.69 by root, Fri Dec 31 19:32:47 2010 UTC