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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.41 by root, Sun Jul 5 23:50:59 2009 UTC vs.
Revision 1.91 by root, Mon Jan 3 01:03:29 2011 UTC

…		…
36		36
37	=cut	37	=cut
38		38
39	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
40		40
41	use strict;	41	use common::sense;
42	no warnings;
43		42
44	use Errno ();	43	use Errno ();
45		44
46	use AnyEvent 4.452 ();	45	use AnyEvent 5.0 ();
47	use AnyEvent::Util ();	46	use AnyEvent::Util ();
48	use AnyEvent::Socket ();
49	use AnyEvent::Handle ();	47	use AnyEvent::Handle ();
50		48
51	use base Exporter::;	49	use base Exporter::;
52		50
53	our $VERSION = '1.12';	51	our $VERSION = '1.5';
54		52
55	our @EXPORT = qw(http_get http_post http_head http_request);	53	our @EXPORT = qw(http_get http_post http_head http_request);
56		54
57	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	55	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
58	our $MAX_RECURSE = 10;	56	our $MAX_RECURSE = 10;
…		…
92	must be an absolute http or https URL.	90	must be an absolute http or https URL.
93		91
94	When called in void context, nothing is returned. In other contexts,	92	When called in void context, nothing is returned. In other contexts,
95	C<http_request> returns a "cancellation guard" - you have to keep the	93	C<http_request> returns a "cancellation guard" - you have to keep the
96	object at least alive until the callback get called. If the object gets	94	object at least alive until the callback get called. If the object gets
97	destroyed before the callbakc is called, the request will be cancelled.	95	destroyed before the callback is called, the request will be cancelled.
98		96
99	The callback will be called with the response data as first argument	97	The callback will be called with the response body data as first argument
100	(or C<undef> if it wasn't available due to errors), and a hash-ref with	98	(or C<undef> if an error occured), and a hash-ref with response headers
101	response headers as second argument.	99	(and trailers) as second argument.
102		100
103	All the headers in that hash are lowercased. In addition to the response	101	All the headers in that hash are lowercased. In addition to the response
104	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>	102	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
		103	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
105	contain the three parts of the HTTP Status-Line of the same name. The	104	three parts of the HTTP Status-Line of the same name. If an error occurs
		105	during the body phase of a request, then the original C<Status> and
		106	C<Reason> values from the header are available as C<OrigStatus> and
		107	C<OrigReason>.
		108
106	pseudo-header C<URL> contains the original URL (which can differ from the	109	The pseudo-header C<URL> contains the actual URL (which can differ from
107	requested URL when following redirects).	110	the requested URL when following redirects - for example, you might get
		111	an error that your URL scheme is not supported even though your URL is a
		112	valid http URL because it redirected to an ftp URL, in which case you can
		113	look at the URL pseudo header).
		114
		115	The pseudo-header C<Redirect> only exists when the request was a result
		116	of an internal redirect. In that case it is an array reference with
		117	the C<($data, $headers)> from the redirect response. Note that this
		118	response could in turn be the result of a redirect itself, and C<<
		119	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		120	response, and so on.
108		121
109	If the server sends a header multiple times, then their contents will be	122	If the server sends a header multiple times, then their contents will be
110	joined together with a comma (C<,>), as per the HTTP spec.	123	joined together with a comma (C<,>), as per the HTTP spec.
111		124
112	If an internal error occurs, such as not being able to resolve a hostname,	125	If an internal error occurs, such as not being able to resolve a hostname,
113	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>	126	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be
114	(usually C<599>) and the C<Reason> pseudo-header will contain an error	127	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
115	message.	128	message. Currently the following status codes are used:
		129
		130	=over 4
		131
		132	=item 595 - errors during connection etsbalishment, proxy handshake.
		133
		134	=item 596 - errors during TLS negotiation, request sending and header processing.
		135
		136	=item 597 - errors during body receiving or processing.
		137
		138	=item 598 - user aborted request via C<on_header> or C<on_body>.
		139
		140	=item 599 - other, usually nonretryable, errors (garbled URL etc.).
		141
		142	=back
116		143
117	A typical callback might look like this:	144	A typical callback might look like this:
118		145
119	sub {	146	sub {
120	my ($body, $hdr) = @_;	147	my ($body, $hdr) = @_;
…		…
136	Whether to recurse requests or not, e.g. on redirects, authentication	163	Whether to recurse requests or not, e.g. on redirects, authentication
137	retries and so on, and how often to do so.	164	retries and so on, and how often to do so.
138		165
139	=item headers => hashref	166	=item headers => hashref
140		167
141	The request headers to use. Currently, C<http_request> may provide its	168	The request headers to use. Currently, C<http_request> may provide its own
142	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers	169	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
143	and will provide defaults for C<User-Agent:> and C<Referer:>.	170	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>
		171	(this can be suppressed by using C<undef> for these headers in which case
		172	they won't be sent at all).
		173
		174	You really should provide your own C<User-Agent:> header value that is
		175	appropriate for your program - I wouldn't be surprised if the default
		176	AnyEvent string gets blocked by webservers sooner or later.
144		177
145	=item timeout => $seconds	178	=item timeout => $seconds
146		179
147	The time-out to use for various stages - each connect attempt will reset	180	The time-out to use for various stages - each connect attempt will reset
148	the timeout, as will read or write activity. Default timeout is 5 minutes.	181	the timeout, as will read or write activity, i.e. this is not an overall
		182	timeout.
		183
		184	Default timeout is 5 minutes.
149		185
150	=item proxy => [$host, $port[, $scheme]] or undef	186	=item proxy => [$host, $port[, $scheme]] or undef
151		187
152	Use the given http proxy for all requests. If not specified, then the	188	Use the given http proxy for all requests. If not specified, then the
153	default proxy (as specified by C<$ENV{http_proxy}>) is used.	189	default proxy (as specified by C<$ENV{http_proxy}>) is used.
154		190
155	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	191	C<$scheme> must be either missing, C<http> for HTTP or C<https> for
156	HTTPS.	192	HTTPS.
157		193
158	=item body => $string	194	=item body => $string
159		195
160	The request body, usually empty. Will be-sent as-is (future versions of	196	The request body, usually empty. Will be sent as-is (future versions of
161	this module might offer more options).	197	this module might offer more options).
162		198
163	=item cookie_jar => $hash_ref	199	=item cookie_jar => $hash_ref
164		200
165	Passing this parameter enables (simplified) cookie-processing, loosely	201	Passing this parameter enables (simplified) cookie-processing, loosely
166	based on the original netscape specification.	202	based on the original netscape specification.
167		203
168	The C<$hash_ref> must be an (initially empty) hash reference which will	204	The C<$hash_ref> must be an (initially empty) hash reference which
169	get updated automatically. It is possible to save the cookie_jar to	205	will get updated automatically. It is possible to save the cookie jar
170	persistent storage with something like JSON or Storable, but this is not	206	to persistent storage with something like JSON or Storable - see the
171	recommended, as expiry times are currently being ignored.	207	C<AnyEvent::HTTP::cookie_jar_expire> function if you wish to remove
		208	expired or session-only cookies, and also for documentation on the format
		209	of the cookie jar.
172		210
173	Note that this cookie implementation is not of very high quality, nor	211	Note that this cookie implementation is not meant to be complete. If
174	meant to be complete. If you want complete cookie management you have to	212	you want complete cookie management you have to do that on your
175	do that on your own. C<cookie_jar> is meant as a quick fix to get some	213	own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites
176	cookie-using sites working. Cookies are a privacy disaster, do not use	214	working. Cookies are a privacy disaster, do not use them unless required
177	them unless required to.	215	to.
		216
		217	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
		218	headers will be set and handled by this module, otherwise they will be
		219	left untouched.
178		220
179	=item tls_ctx => $scheme | $tls_ctx	221	=item tls_ctx => $scheme | $tls_ctx
180		222
181	Specifies the AnyEvent::TLS context to be used for https connections. This	223	Specifies the AnyEvent::TLS context to be used for https connections. This
182	parameter follows the same rules as the C<tls_ctx> parameter to	224	parameter follows the same rules as the C<tls_ctx> parameter to
…		…
186	verification) TLS context.	228	verification) TLS context.
187		229
188	The default for this option is C<low>, which could be interpreted as "give	230	The default for this option is C<low>, which could be interpreted as "give
189	me the page, no matter what".	231	me the page, no matter what".
190		232
		233	=item on_prepare => $callback->($fh)
		234
		235	In rare cases you need to "tune" the socket before it is used to
		236	connect (for exmaple, to bind it on a given IP address). This parameter
		237	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		238	and behaves exactly the same way (e.g. it has to provide a
		239	timeout). See the description for the C<$prepare_cb> argument of
		240	C<AnyEvent::Socket::tcp_connect> for details.
		241
		242	=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
		243
		244	In even rarer cases you want total control over how AnyEvent::HTTP
		245	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
		246	to do this, but you can provide your own C<tcp_connect> function -
		247	obviously, it has to follow the same calling conventions, except that it
		248	may always return a connection guard object.
		249
		250	There are probably lots of weird uses for this function, starting from
		251	tracing the hosts C<http_request> actually tries to connect, to (inexact
		252	but fast) host => IP address caching or even socks protocol support.
		253
191	=item on_header => $callback->($hdr)	254	=item on_header => $callback->($headers)
192		255
193	When specified, this callback will be called with the header hash as soon	256	When specified, this callback will be called with the header hash as soon
194	as headers have been successfully received from the remote server (not on	257	as headers have been successfully received from the remote server (not on
195	locally-generated errors).	258	locally-generated errors).
196		259
…		…
200		263
201	This callback is useful, among other things, to quickly reject unwanted	264	This callback is useful, among other things, to quickly reject unwanted
202	content, which, if it is supposed to be rare, can be faster than first	265	content, which, if it is supposed to be rare, can be faster than first
203	doing a C<HEAD> request.	266	doing a C<HEAD> request.
204		267
		268	The downside is that cancelling the request makes it impossible to re-use
		269	the connection. Also, the C<on_header> callback will not receive any
		270	trailer (headers sent after the response body).
		271
		272	Example: cancel the request unless the content-type is "text/html".
		273
		274	on_header => sub {
		275	$_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/
		276	},
		277
205	=item on_body => $callback->($data, $hdr)	278	=item on_body => $callback->($partial_body, $headers)
206		279
207	When specified, all body data will be "filtered" through this callback.	280	When specified, all body data will be passed to this callback instead of
		281	to the completion callback. The completion callback will get the empty
		282	string instead of the body data.
208		283
209	The callback will incrementally receive body data, and is supposed to	284	It has to return either true (in which case AnyEvent::HTTP will continue),
210	return it or a modified version of it (empty strings are valid returns).	285	or false, in which case AnyEvent::HTTP will cancel the download (and call
		286	the completion callback with an error code of C<598>).
211		287
212	If the callback returns C<undef>, then the request will be cancelled.	288	The downside to cancelling the request is that it makes it impossible to
		289	re-use the connection.
213		290
214	This callback is useful when you want to do some processing on the data,	291	This callback is useful when the data is too large to be held in memory
215	or the data is too large to be held in memory (so the callback writes it	292	(so the callback writes it to a file) or when only some information should
216	to a file and returns the empty string) and so on.	293	be extracted, or when the body should be processed incrementally.
217		294
218	It is usually preferred over doing your own body handling via	295	It is usually preferred over doing your own body handling via
219	C<want_body_handle>.	296	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		297	only used to create a connection, C<want_body_handle> is the better
		298	alternative, as it allows you to install your own event handler, reducing
		299	resource usage.
220		300
221	=item want_body_handle => $enable	301	=item want_body_handle => $enable
222		302
223	When enabled (default is disabled), the behaviour of AnyEvent::HTTP	303	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
224	changes considerably: after parsing the headers, and instead of	304	changes considerably: after parsing the headers, and instead of
…		…
236	This is useful with some push-type services, where, after the initial	316	This is useful with some push-type services, where, after the initial
237	headers, an interactive protocol is used (typical example would be the	317	headers, an interactive protocol is used (typical example would be the
238	push-style twitter API which starts a JSON/XML stream).	318	push-style twitter API which starts a JSON/XML stream).
239		319
240	If you think you need this, first have a look at C<on_body>, to see if	320	If you think you need this, first have a look at C<on_body>, to see if
241	that doesn'T solve your problem in a better way.	321	that doesn't solve your problem in a better way.
242		322
243	=back	323	=back
244		324
245	Example: make a simple HTTP GET request for http://www.nethype.de/	325	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		326	the response body.
246		327
247	http_request GET => "http://www.nethype.de/", sub {	328	http_request GET => "http://www.nethype.de/", sub {
248	my ($body, $hdr) = @_;	329	my ($body, $hdr) = @_;
249	print "$body\n";	330	print "$body\n";
250	};	331	};
251		332
252	Example: make a HTTP HEAD request on https://www.google.com/, use a	333	Example: do a HTTP HEAD request on https://www.google.com/, use a
253	timeout of 30 seconds.	334	timeout of 30 seconds.
254		335
255	http_request	336	http_request
256	GET => "https://www.google.com",	337	GET => "https://www.google.com",
		338	headers => { "user-agent" => "MySearchClient 1.0" },
257	timeout => 30,	339	timeout => 30,
258	sub {	340	sub {
259	my ($body, $hdr) = @_;	341	my ($body, $hdr) = @_;
260	use Data::Dumper;	342	use Data::Dumper;
261	print Dumper $hdr;	343	print Dumper $hdr;
262	}	344	}
263	;	345	;
264		346
265	Example: make another simple HTTP GET request, but immediately try to	347	Example: do another simple HTTP GET request, but immediately try to
266	cancel it.	348	cancel it.
267		349
268	my $request = http_request GET => "http://www.nethype.de/", sub {	350	my $request = http_request GET => "http://www.nethype.de/", sub {
269	my ($body, $hdr) = @_;	351	my ($body, $hdr) = @_;
270	print "$body\n";	352	print "$body\n";
…		…
302	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	384	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
303		385
304	_slot_schedule $_[0];	386	_slot_schedule $_[0];
305	}	387	}
306		388
307	our $qr_nl = qr<\015?\012>;	389	#############################################################################
308	our $qr_nlnl = qr<\015?\012\015?\012>;	390
		391	# expire cookies
		392	sub cookie_jar_expire($;$) {
		393	my ($jar, $session_end) = @_;
		394
		395	%$jar = () if $jar->{version} != 1;
		396
		397	my $anow = AE::now;
		398
		399	while (my ($chost, $paths) = each %$jar) {
		400	next unless ref $paths;
		401
		402	while (my ($cpath, $cookies) = each %$paths) {
		403	while (my ($cookie, $kv) = each %$cookies) {
		404	if (exists $kv->{_expires}) {
		405	delete $cookies->{$cookie}
		406	if $anow > $kv->{_expires};
		407	} elsif ($session_end) {
		408	delete $cookies->{$cookie};
		409	}
		410	}
		411
		412	delete $paths->{$cpath}
		413	unless %$cookies;
		414	}
		415
		416	delete $jar->{$chost}
		417	unless %$paths;
		418	}
		419	}
		420
		421	# extract cookies from jar
		422	sub cookie_jar_extract($$$$) {
		423	my ($jar, $uscheme, $uhost, $upath) = @_;
		424
		425	%$jar = () if $jar->{version} != 1;
		426
		427	my @cookies;
		428
		429	while (my ($chost, $paths) = each %$jar) {
		430	next unless ref $paths;
		431
		432	if ($chost =~ /^\./) {
		433	next unless $chost eq substr $uhost, -length $chost;
		434	} elsif ($chost =~ /\./) {
		435	next unless $chost eq $uhost;
		436	} else {
		437	next;
		438	}
		439
		440	while (my ($cpath, $cookies) = each %$paths) {
		441	next unless $cpath eq substr $upath, 0, length $cpath;
		442
		443	while (my ($cookie, $kv) = each %$cookies) {
		444	next if $uscheme ne "https" && exists $kv->{secure};
		445
		446	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
		447	delete $cookies->{$cookie};
		448	next;
		449	}
		450
		451	my $value = $kv->{value};
		452
		453	if ($value =~ /[=;,[:space:]]/) {
		454	$value =~ s/([\\"])/\\$1/g;
		455	$value = "\"$value\"";
		456	}
		457
		458	push @cookies, "$cookie=$value";
		459	}
		460	}
		461	}
		462
		463	\@cookies
		464	}
		465
		466	# parse set_cookie header into jar
		467	sub cookie_jar_set_cookie($$$$) {
		468	my ($jar, $set_cookie, $uhost, $date) = @_;
		469
		470	my $anow = int AE::now;
		471	my $snow; # server-now
		472
		473	for ($set_cookie) {
		474	# parse NAME=VALUE
		475	my @kv;
		476
		477	# expires is not http-compliant in the original cookie-spec,
		478	# we support the official date format and some extensions
		479	while (
		480	m{
		481	\G\s*
		482	(?:
		483	expires \s*=\s* ([A-Z][a-z][a-z]+,\ [^,;]+)
		484	| ([^=;,[:space:]]+) (?: \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) ) )?
		485	)
		486	}gcxsi
		487	) {
		488	my $name = $2;
		489	my $value = $4;
		490
		491	if (defined $1) {
		492	# expires
		493	$name = "expires";
		494	$value = $1;
		495	} elsif (defined $3) {
		496	# quoted
		497	$value = $3;
		498	$value =~ s/\\(.)/$1/gs;
		499	}
		500
		501	push @kv, lc $name, $value;
		502
		503	last unless /\G\s*;/gc;
		504	}
		505
		506	last unless @kv;
		507
		508	my $name = shift @kv;
		509	my %kv = (value => shift @kv, @kv);
		510
		511	if (exists $kv{"max-age"}) {
		512	$kv{_expires} = $anow + delete $kv{"max-age"};
		513	} elsif (exists $kv{expires}) {
		514	$snow ||= parse_date ($date) || $anow;
		515	$kv{_expires} = $anow + (parse_date (delete $kv{expires}) - $snow);
		516	} else {
		517	delete $kv{_expires};
		518	}
		519
		520	my $cdom;
		521	my $cpath = (delete $kv{path}) || "/";
		522
		523	if (exists $kv{domain}) {
		524	$cdom = delete $kv{domain};
		525
		526	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		527
		528	next if $cdom =~ /\.$/;
		529
		530	# this is not rfc-like and not netscape-like. go figure.
		531	my $ndots = $cdom =~ y/.//;
		532	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		533	} else {
		534	$cdom = $uhost;
		535	}
		536
		537	# store it
		538	$jar->{version} = 1;
		539	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
		540
		541	redo if /\G\s*,/gc;
		542	}
		543	}
		544
		545	# continue to parse $_ for headers and place them into the arg
		546	sub parse_hdr() {
		547	my %hdr;
		548
		549	# things seen, not parsed:
		550	# p3pP="NON CUR OTPi OUR NOR UNI"
		551
		552	$hdr{lc $1} .= ",$2"
		553	while /\G
		554	([^:\000-\037]*):
		555	[\011\040]*
		556	((?: [^\012]+ | \012[\011\040] )*)
		557	\012
		558	/gxc;
		559
		560	/\G$/
		561	or return;
		562
		563	# remove the "," prefix we added to all headers above
		564	substr $_, 0, 1, ""
		565	for values %hdr;
		566
		567	\%hdr
		568	}
		569
		570	our $qr_nlnl = qr{(?<![^\012])\015?\012};
309		571
310	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	572	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
311	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	573	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
312		574
313	sub http_request($$@) {	575	sub http_request($$@) {
…		…
325	while (my ($k, $v) = each %$hdr) {	587	while (my ($k, $v) = each %$hdr) {
326	$hdr{lc $k} = $v;	588	$hdr{lc $k} = $v;
327	}	589	}
328	}	590	}
329		591
		592	# pseudo headers for all subsequent responses
		593	my @pseudo = (URL => $url);
		594	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		595
330	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	596	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
331		597
332	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })	598	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
333	if $recurse < 0;	599	if $recurse < 0;
334		600
335	my $proxy = $arg{proxy} || $PROXY;	601	my $proxy = $arg{proxy} || $PROXY;
336	my $timeout = $arg{timeout} || $TIMEOUT;	602	my $timeout = $arg{timeout} || $TIMEOUT;
337		603
338	my ($uscheme, $uauthority, $upath, $query, $fragment) =	604	my ($uscheme, $uauthority, $upath, $query, $fragment) =
339	$url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;	605	$url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
340		606
341	$uscheme = lc $uscheme;	607	$uscheme = lc $uscheme;
342		608
343	my $uport = $uscheme eq "http" ? 80	609	my $uport = $uscheme eq "http" ? 80
344	: $uscheme eq "https" ? 443	610	: $uscheme eq "https" ? 443
345	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });	611	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
346		612
347	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	613	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
348	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });	614	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
349		615
350	my $uhost = $1;	616	my $uhost = lc $1;
351	$uport = $2 if defined $2;	617	$uport = $2 if defined $2;
352		618
		619	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		620	unless exists $hdr{host};
		621
353	$uhost =~ s/^\[(.*)\]$/$1/;	622	$uhost =~ s/^\[(.*)\]$/$1/;
354	$upath .= "?$query" if length $query;	623	$upath .= $query if length $query;
355		624
356	$upath =~ s%^/?%/%;	625	$upath =~ s%^/?%/%;
357		626
358	# cookie processing	627	# cookie processing
359	if (my $jar = $arg{cookie_jar}) {	628	if (my $jar = $arg{cookie_jar}) {
360	%$jar = () if $jar->{version} != 1;	629	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
361		630
362	my @cookie;
363
364	while (my ($chost, $v) = each %$jar) {
365	if ($chost =~ /^\./) {
366	next unless $chost eq substr $uhost, -length $chost;
367	} elsif ($chost =~ /\./) {
368	next unless $chost eq $uhost;
369	} else {
370	next;
371	}
372
373	while (my ($cpath, $v) = each %$v) {
374	next unless $cpath eq substr $upath, 0, length $cpath;
375
376	while (my ($k, $v) = each %$v) {
377	next if $uscheme ne "https" && exists $v->{secure};
378	my $value = $v->{value};
379	$value =~ s/([\\"])/\\$1/g;
380	push @cookie, "$k=\"$value\"";
381	}
382	}
383	}
384
385	$hdr{cookie} = join "; ", @cookie	631	$hdr{cookie} = join "; ", @$cookies
386	if @cookie;	632	if @$cookies;
387	}	633	}
388		634
389	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path	635	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
390		636
391	if ($proxy) {	637	if ($proxy) {
392	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);	638	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
		639
		640	$rscheme = "http" unless defined $rscheme;
393		641
394	# don't support https requests over https-proxy transport,	642	# don't support https requests over https-proxy transport,
395	# can't be done with tls as spec'ed, unless you double-encrypt.	643	# can't be done with tls as spec'ed, unless you double-encrypt.
396	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	644	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		645
		646	$rhost = lc $rhost;
		647	$rscheme = lc $rscheme;
397	} else {	648	} else {
398	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	649	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
399	}	650	}
400		651
401	$hdr{"user-agent"} ||= $USERAGENT;	652	# leave out fragment and query string, just a heuristic
402	$hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic	653	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		654	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
403		655
404	$hdr{host} = "$uhost:$uport";
405	$hdr{"content-length"} = length $arg{body};	656	$hdr{"content-length"} = length $arg{body}
		657	if length $arg{body} || $method ne "GET";
		658
		659	my $idempotent = $method =~ /^(?:GET|HEAD|PUT|DELETE|OPTIONS|TRACE)$/;
		660
		661	# default value for keepalive is true iff the request is for an idempotent method
		662	my $keepalive = exists $arg{keepalive}
		663	? $arg{keepalive}*1
		664	: $idempotent ? $PERSISTENT_TIMEOUT : 0;
		665
		666	$hdr{connection} = ($keepalive ? "" : "close ") . "Te"; #1.1
		667	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
406		668
407	my %state = (connect_guard => 1);	669	my %state = (connect_guard => 1);
		670
		671	my $ae_error = 595; # connecting
		672
		673	# handle actual, non-tunneled, request
		674	my $handle_actual_request = sub {
		675	$ae_error = 596; # request phase
		676
		677	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		678
		679	# send request
		680	$state{handle}->push_write (
		681	"$method $rpath HTTP/1.1\015\012"
		682	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		683	. "\015\012"
		684	. (delete $arg{body})
		685	);
		686
		687	# return if error occured during push_write()
		688	return unless %state;
		689
		690	# reduce memory usage, save a kitten, also re-use it for the response headers.
		691	%hdr = ();
		692
		693	# status line and headers
		694	$state{read_response} = sub {
		695	for ("$_[1]") {
		696	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		697
		698	/^HTTP\/0*([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/gxci
		699	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
		700
		701	# 100 Continue handling
		702	# should not happen as we don't send expect: 100-continue,
		703	# but we handle it just in case.
		704	# since we send the request body regardless, if we get an error
		705	# we are out of-sync, which we currently do NOT handle correctly.
		706	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		707	if $2 eq 100;
		708
		709	push @pseudo,
		710	HTTPVersion => $1,
		711	Status => $2,
		712	Reason => $3,
		713	;
		714
		715	my $hdr = parse_hdr
		716	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
		717
		718	%hdr = (%$hdr, @pseudo);
		719	}
		720
		721	# redirect handling
		722	# microsoft and other shitheads don't give a shit for following standards,
		723	# try to support some common forms of broken Location headers.
		724	if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
		725	$hdr{location} =~ s/^\.\/+//;
		726
		727	my $url = "$rscheme://$uhost:$uport";
		728
		729	unless ($hdr{location} =~ s/^\///) {
		730	$url .= $upath;
		731	$url =~ s/\/[^\/]*$//;
		732	}
		733
		734	$hdr{location} = "$url/$hdr{location}";
		735	}
		736
		737	my $redirect;
		738
		739	if ($recurse) {
		740	my $status = $hdr{Status};
		741
		742	# industry standard is to redirect POST as GET for
		743	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		744	# also, the UA should ask the user for 301 and 307 and POST,
		745	# industry standard seems to be to simply follow.
		746	# we go with the industry standard.
		747	if ($status == 301 or $status == 302 or $status == 303) {
		748	# HTTP/1.1 is unclear on how to mutate the method
		749	$method = "GET" unless $method eq "HEAD";
		750	$redirect = 1;
		751	} elsif ($status == 307) {
		752	$redirect = 1;
		753	}
		754	}
		755
		756	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
		757	my $may_keep_alive = $_[3];
		758
		759	$state{handle}->destroy if $state{handle};
		760	%state = ();
		761
		762	if (defined $_[1]) {
		763	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		764	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		765	}
		766
		767	# set-cookie processing
		768	if ($arg{cookie_jar}) {
		769	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		770	}
		771
		772	if ($redirect && exists $hdr{location}) {
		773	# we ignore any errors, as it is very common to receive
		774	# Content-Length != 0 but no actual body
		775	# we also access %hdr, as $_[1] might be an erro
		776	http_request (
		777	$method => $hdr{location},
		778	%arg,
		779	recurse => $recurse - 1,
		780	Redirect => [$_[0], \%hdr],
		781	$cb);
		782	} else {
		783	$cb->($_[0], \%hdr);
		784	}
		785	};
		786
		787	$ae_error = 597; # body phase
		788
		789	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		790
		791	my $len = $chunked ? undef : $hdr{"content-length"};
		792
		793	# body handling, many different code paths
		794	# - no body expected
		795	# - want_body_handle
		796	# - te chunked
		797	# - 2x length known (with or without on_body)
		798	# - 2x length not known (with or without on_body)
		799	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		800	$finish->(undef, 598 => "Request cancelled by on_header");
		801	} elsif (
		802	$hdr{Status} =~ /^(?:1..|204|205|304)$/
		803	or $method eq "HEAD"
		804	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		805	) {
		806	# no body
		807	$finish->("", undef, undef, 1);
		808
		809	} elsif (!$redirect && $arg{want_body_handle}) {
		810	$_[0]->on_eof (undef);
		811	$_[0]->on_error (undef);
		812	$_[0]->on_read (undef);
		813
		814	$finish->(delete $state{handle});
		815
		816	} elsif ($chunked) {
		817	my $cl = 0;
		818	my $body = undef;
		819	my $on_body = $arg{on_body} || sub { $body .= shift; 1 };
		820
		821	$state{read_chunk} = sub {
		822	$_[1] =~ /^([0-9a-fA-F]+)/
		823	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		824
		825	my $len = hex $1;
		826
		827	if ($len) {
		828	$cl += $len;
		829
		830	$_[0]->push_read (chunk => $len, sub {
		831	$on_body->($_[1], \%hdr)
		832	or return $finish->(undef, 598 => "Request cancelled by on_body");
		833
		834	$_[0]->push_read (line => sub {
		835	length $_[1]
		836	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		837	$_[0]->push_read (line => $state{read_chunk});
		838	});
		839	});
		840	} else {
		841	$hdr{"content-length"} ||= $cl;
		842
		843	$_[0]->push_read (line => $qr_nlnl, sub {
		844	if (length $_[1]) {
		845	for ("$_[1]") {
		846	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		847
		848	my $hdr = parse_hdr
		849	or return $finish->(undef, $ae_error => "Garbled response trailers");
		850
		851	%hdr = (%hdr, %$hdr);
		852	}
		853	}
		854
		855	$finish->($body, undef, undef, 1);
		856	});
		857	}
		858	};
		859
		860	$_[0]->push_read (line => $state{read_chunk});
		861
		862	} elsif ($arg{on_body}) {
		863	if (defined $len) {
		864	$_[0]->on_read (sub {
		865	$len -= length $_[0]{rbuf};
		866
		867	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		868	or return $finish->(undef, 598 => "Request cancelled by on_body");
		869
		870	$len > 0
		871	or $finish->("", undef, undef, 1);
		872	});
		873	} else {
		874	$_[0]->on_eof (sub {
		875	$finish->("");
		876	});
		877	$_[0]->on_read (sub {
		878	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		879	or $finish->(undef, 598 => "Request cancelled by on_body");
		880	});
		881	}
		882	} else {
		883	$_[0]->on_eof (undef);
		884
		885	if (defined $len) {
		886	$_[0]->on_read (sub {
		887	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		888	if $len <= length $_[0]{rbuf};
		889	});
		890	} else {
		891	$_[0]->on_error (sub {
		892	($! == Errno::EPIPE || !$!)
		893	? $finish->(delete $_[0]{rbuf})
		894	: $finish->(undef, $ae_error => $_[2]);
		895	});
		896	$_[0]->on_read (sub { });
		897	}
		898	}
		899	};
		900
		901	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
		902	};
		903
		904	my $connect_cb = sub {
		905	$state{fh} = shift
		906	or do {
		907	my $err = "$!";
		908	%state = ();
		909	return $cb->(undef, { @pseudo, Status => $ae_error, Reason => $err });
		910	};
		911
		912	return unless delete $state{connect_guard};
		913
		914	# get handle
		915	$state{handle} = new AnyEvent::Handle
		916	fh => $state{fh},
		917	peername => $rhost,
		918	tls_ctx => $arg{tls_ctx},
		919	# these need to be reconfigured on keepalive handles
		920	timeout => $timeout,
		921	on_error => sub {
		922	%state = ();
		923	$cb->(undef, { @pseudo, Status => $ae_error, Reason => $_[2] });
		924	},
		925	on_eof => sub {
		926	%state = ();
		927	$cb->(undef, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" });
		928	},
		929	;
		930
		931	# limit the number of persistent connections
		932	# keepalive not yet supported
		933	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
		934	# ++$KA_COUNT{$_[1]};
		935	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		936	# --$KA_COUNT{$_[1]}
		937	# };
		938	# $hdr{connection} = "keep-alive";
		939	# }
		940
		941	$state{handle}->starttls ("connect") if $rscheme eq "https";
		942
		943	# now handle proxy-CONNECT method
		944	if ($proxy && $uscheme eq "https") {
		945	# oh dear, we have to wrap it into a connect request
		946
		947	# maybe re-use $uauthority with patched port?
		948	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");
		949	$state{handle}->push_read (line => $qr_nlnl, sub {
		950	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		951	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
		952
		953	if ($2 == 200) {
		954	$rpath = $upath;
		955	$handle_actual_request->();
		956	} else {
		957	%state = ();
		958	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
		959	}
		960	});
		961	} else {
		962	$handle_actual_request->();
		963	}
		964	};
408		965
409	_get_slot $uhost, sub {	966	_get_slot $uhost, sub {
410	$state{slot_guard} = shift;	967	$state{slot_guard} = shift;
411		968
412	return unless $state{connect_guard};	969	return unless $state{connect_guard};
413		970
414	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	971	my $tcp_connect = $arg{tcp_connect}
415	$state{fh} = shift	972	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
416	or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url }));
417	pop; # free memory, save a tree
418		973
419	return unless delete $state{connect_guard};	974	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });
420
421	# get handle
422	$state{handle} = new AnyEvent::Handle
423	fh => $state{fh},
424	timeout => $timeout,
425	peername => $rhost,
426	tls_ctx => $arg{tls_ctx};
427
428	# limit the number of persistent connections
429	# keepalive not yet supported
430	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
431	++$KA_COUNT{$_[1]};
432	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {
433	--$KA_COUNT{$_[1]}
434	};
435	$hdr{connection} = "keep-alive";
436	} else {
437	delete $hdr{connection};
438	}
439
440	# (re-)configure handle
441	$state{handle}->on_error (sub {
442	%state = ();
443	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
444	});
445	$state{handle}->on_eof (sub {
446	%state = ();
447	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
448	});
449
450	$state{handle}->starttls ("connect") if $rscheme eq "https";
451
452	# handle actual, non-tunneled, request
453	my $handle_actual_request = sub {
454	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
455
456	# send request
457	$state{handle}->push_write (
458	"$method $rpath HTTP/1.0\015\012"
459	. (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
460	. "\015\012"
461	. (delete $arg{body})
462	);
463
464	%hdr = (); # reduce memory usage, save a kitten
465
466	# status line
467	$state{handle}->push_read (line => $qr_nl, sub {
468	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
469	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
470
471	my %hdr = ( # response headers
472	HTTPVersion => ",$1",
473	Status => ",$2",
474	Reason => ",$3",
475	URL => ",$url"
476	);
477
478	# headers, could be optimized a bit
479	$state{handle}->unshift_read (line => $qr_nlnl, sub {
480	for ("$_[1]\012") {
481	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
482
483	# things seen, not parsed:
484	# p3pP="NON CUR OTPi OUR NOR UNI"
485
486	$hdr{lc $1} .= ",$2"
487	while /\G
488	([^:\000-\037]+):
489	[\011\040]*
490	((?: [^\012]+ | \012[\011\040] )*)
491	\012
492	/gxc;
493
494	/\G$/
495	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
496	}
497
498	substr $_, 0, 1, ""
499	for values %hdr;
500
501	# redirect handling
502	# microsoft and other shitheads don't give a shit for following standards,
503	# try to support some common forms of broken Location headers.
504	if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
505	$hdr{location} =~ s/^\.\/+//;
506
507	my $url = "$rscheme://$uhost:$uport";
508
509	unless ($hdr{location} =~ s/^\///) {
510	$url .= $upath;
511	$url =~ s/\/[^\/]*$//;
512	}
513
514	$hdr{location} = "$url/$hdr{location}";
515	}
516
517	my $redirect;
518
519	if ($recurse) {
520	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
521	# apparently, mozilla et al. just change POST to GET here
522	# more research is needed before we do the same
523	$redirect = 1;
524	} elsif ($hdr{Status} == 303) {
525	# even http/1.1 is unclear on how to mutate the method
526	$method = "GET" unless $method eq "HEAD";
527	$redirect = 1;
528	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) {
529	$redirect = 1;
530	}
531	}
532
533	my $finish = sub {
534	$state{handle}->destroy if $state{handle};
535	%state = ();
536
537	# set-cookie processing
538	if ($arg{cookie_jar}) {
539	for ($_[1]{"set-cookie"}) {
540	# parse NAME=VALUE
541	my @kv;
542
543	while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
544	my $name = $1;
545	my $value = $3;
546
547	unless ($value) {
548	$value = $2;
549	$value =~ s/\\(.)/$1/gs;
550	}
551
552	push @kv, $name => $value;
553
554	last unless /\G\s*;/gc;
555	}
556
557	last unless @kv;
558
559	my $name = shift @kv;
560	my %kv = (value => shift @kv, @kv);
561
562	my $cdom;
563	my $cpath = (delete $kv{path}) || "/";
564
565	if (exists $kv{domain}) {
566	$cdom = delete $kv{domain};
567
568	$cdom =~ s/^\.?/./; # make sure it starts with a "."
569
570	next if $cdom =~ /\.$/;
571
572	# this is not rfc-like and not netscape-like. go figure.
573	my $ndots = $cdom =~ y/.//;
574	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
575	} else {
576	$cdom = $uhost;
577	}
578
579	# store it
580	$arg{cookie_jar}{version} = 1;
581	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
582
583	redo if /\G\s*,/gc;
584	}
585	}
586
587	if ($redirect) {
588	# we ignore any errors, as it is very common to receive
589	# Content-Length != 0 but no actual body
590	# we also access %hdr, as $_[1] might be an erro
591	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
592	} else {
593	$cb->($_[0], $_[1]);
594	}
595	};
596
597	my $len = $hdr{"content-length"};
598
599	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
600	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
601	} elsif (
602	$hdr{Status} =~ /^(?:1..|204|304)$/
603	or $method eq "HEAD"
604	or (defined $len && !$len)
605	) {
606	# no body
607	$finish->("", \%hdr);
608	} else {
609	# body handling, four different code paths
610	# for want_body_handle, on_body (2x), normal (2x)
611	# we might read too much here, but it does not matter yet (no pers. connections)
612	if (!$redirect && $arg{want_body_handle}) {
613	$_[0]->on_eof (undef);
614	$_[0]->on_error (undef);
615	$_[0]->on_read (undef);
616
617	$finish->(delete $state{handle}, \%hdr);
618
619	} elsif ($arg{on_body}) {
620	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
621	if ($len) {
622	$_[0]->on_eof (undef);
623	$_[0]->on_read (sub {
624	$len -= length $_[0]{rbuf};
625
626	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
627	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
628
629	$len > 0
630	or $finish->("", \%hdr);
631	});
632	} else {
633	$_[0]->on_eof (sub {
634	$finish->("", \%hdr);
635	});
636	$_[0]->on_read (sub {
637	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
638	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
639	});
640	}
641	} else {
642	$_[0]->on_eof (undef);
643
644	if ($len) {
645	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
646	$_[0]->on_read (sub {
647	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
648	if $len <= length $_[0]{rbuf};
649	});
650	} else {
651	$_[0]->on_error (sub {
652	$! == Errno::EPIPE
653	? $finish->(delete $_[0]{rbuf}, \%hdr)
654	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
655	});
656	$_[0]->on_read (sub { });
657	}
658	}
659	}
660	});
661	});
662	};
663
664	# now handle proxy-CONNECT method
665	if ($proxy && $uscheme eq "https") {
666	# oh dear, we have to wrap it into a connect request
667
668	# maybe re-use $uauthority with patched port?
669	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
670	$state{handle}->push_read (line => $qr_nlnl, sub {
671	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
672	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
673
674	if ($2 == 200) {
675	$rpath = $upath;
676	&$handle_actual_request;
677	} else {
678	%state = ();
679	$cb->(undef, { Status => $2, Reason => $3, URL => $url });
680	}
681	});
682	} else {
683	&$handle_actual_request;
684	}
685
686	}, sub {
687	$timeout
688	};
689	};	975	};
690		976
691	defined wantarray && AnyEvent::Util::guard { %state = () }	977	defined wantarray && AnyEvent::Util::guard { %state = () }
692	}	978	}
693		979
…		…
707	&http_request	993	&http_request
708	}	994	}
709		995
710	=back	996	=back
711		997
		998	=head2 DNS CACHING
		999
		1000	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		1001	the actual connection, which in turn uses AnyEvent::DNS to resolve
		1002	hostnames. The latter is a simple stub resolver and does no caching
		1003	on its own. If you want DNS caching, you currently have to provide
		1004	your own default resolver (by storing a suitable resolver object in
		1005	C<$AnyEvent::DNS::RESOLVER>).
		1006
712	=head2 GLOBAL FUNCTIONS AND VARIABLES	1007	=head2 GLOBAL FUNCTIONS AND VARIABLES
713		1008
714	=over 4	1009	=over 4
715		1010
716	=item AnyEvent::HTTP::set_proxy "proxy-url"	1011	=item AnyEvent::HTTP::set_proxy "proxy-url"
717		1012
718	Sets the default proxy server to use. The proxy-url must begin with a	1013	Sets the default proxy server to use. The proxy-url must begin with a
719	string of the form C<http://host:port> (optionally C<https:...>).	1014	string of the form C<http://host:port> (optionally C<https:...>), croaks
		1015	otherwise.
		1016
		1017	To clear an already-set proxy, use C<undef>.
		1018
		1019	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
		1020
		1021	Remove all cookies from the cookie jar that have been expired. If
		1022	C<$session_end> is given and true, then additionally remove all session
		1023	cookies.
		1024
		1025	You should call this function (with a true C<$session_end>) before you
		1026	save cookies to disk, and you should call this function after loading them
		1027	again. If you have a long-running program you can additonally call this
		1028	function from time to time.
		1029
		1030	A cookie jar is initially an empty hash-reference that is managed by this
		1031	module. It's format is subject to change, but currently it is like this:
		1032
		1033	The key C<version> has to contain C<1>, otherwise the hash gets
		1034	emptied. All other keys are hostnames or IP addresses pointing to
		1035	hash-references. The key for these inner hash references is the
		1036	server path for which this cookie is meant, and the values are again
		1037	hash-references. The keys of those hash-references is the cookie name, and
		1038	the value, you guessed it, is another hash-reference, this time with the
		1039	key-value pairs from the cookie, except for C<expires> and C<max-age>,
		1040	which have been replaced by a C<_expires> key that contains the cookie
		1041	expiry timestamp.
		1042
		1043	Here is an example of a cookie jar with a single cookie, so you have a
		1044	chance of understanding the above paragraph:
		1045
		1046	{
		1047	version => 1,
		1048	"10.0.0.1" => {
		1049	"/" => {
		1050	"mythweb_id" => {
		1051	_expires => 1293917923,
		1052	value => "ooRung9dThee3ooyXooM1Ohm",
		1053	},
		1054	},
		1055	},
		1056	}
		1057
		1058	=item $date = AnyEvent::HTTP::format_date $timestamp
		1059
		1060	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		1061	Date (RFC 2616).
		1062
		1063	=item $timestamp = AnyEvent::HTTP::parse_date $date
		1064
		1065	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
		1066	bunch of minor variations of those, and returns the corresponding POSIX
		1067	timestamp, or C<undef> if the date cannot be parsed.
720		1068
721	=item $AnyEvent::HTTP::MAX_RECURSE	1069	=item $AnyEvent::HTTP::MAX_RECURSE
722		1070
723	The default value for the C<recurse> request parameter (default: C<10>).	1071	The default value for the C<recurse> request parameter (default: C<10>).
724		1072
725	=item $AnyEvent::HTTP::USERAGENT	1073	=item $AnyEvent::HTTP::USERAGENT
726		1074
727	The default value for the C<User-Agent> header (the default is	1075	The default value for the C<User-Agent> header (the default is
728	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1076	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
729		1077
730	=item $AnyEvent::HTTP::MAX_PERSISTENT	1078	=item $AnyEvent::HTTP::MAX_PER_HOST
731		1079
732	The maximum number of persistent connections to keep open (default: 8).	1080	The maximum number of concurrent connections to the same host (identified
		1081	by the hostname). If the limit is exceeded, then the additional requests
		1082	are queued until previous connections are closed.
733		1083
734	Not implemented currently.	1084	The default value for this is C<4>, and it is highly advisable to not
735		1085	increase it.
736	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
737
738	The maximum time to cache a persistent connection, in seconds (default: 2).
739
740	Not implemented currently.
741		1086
742	=item $AnyEvent::HTTP::ACTIVE	1087	=item $AnyEvent::HTTP::ACTIVE
743		1088
744	The number of active connections. This is not the number of currently	1089	The number of active connections. This is not the number of currently
745	running requests, but the number of currently open and non-idle TCP	1090	running requests, but the number of currently open and non-idle TCP
…		…
747		1092
748	=back	1093	=back
749		1094
750	=cut	1095	=cut
751		1096
		1097	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		1098	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		1099
		1100	sub format_date($) {
		1101	my ($time) = @_;
		1102
		1103	# RFC 822/1123 format
		1104	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		1105
		1106	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		1107	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		1108	$H, $M, $S;
		1109	}
		1110
		1111	sub parse_date($) {
		1112	my ($date) = @_;
		1113
		1114	my ($d, $m, $y, $H, $M, $S);
		1115
		1116	if ($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$/) {
		1117	# RFC 822/1123, required by RFC 2616 (with " ")
		1118	# cookie dates (with "-")
		1119
		1120	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		1121
		1122	} elsif ($date =~ /^[A-Z][a-z][a-z]+, ([0-9][0-9]?)-([A-Z][a-z][a-z])-([0-9][0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) GMT$/) {
		1123	# RFC 850
		1124	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		1125
		1126	} elsif ($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])$/) {
		1127	# ISO C's asctime
		1128	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		1129	}
		1130	# other formats fail in the loop below
		1131
		1132	for (0..11) {
		1133	if ($m eq $month[$_]) {
		1134	require Time::Local;
		1135	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		1136	}
		1137	}
		1138
		1139	undef
		1140	}
		1141
752	sub set_proxy($) {	1142	sub set_proxy($) {
		1143	if (length $_[0]) {
753	$PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	1144	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		1145	or Carp::croak "$_[0]: invalid proxy URL";
		1146	$PROXY = [$2, $3 || 3128, $1]
		1147	} else {
		1148	undef $PROXY;
		1149	}
754	}	1150	}
755		1151
756	# initialise proxy from environment	1152	# initialise proxy from environment
		1153	eval {
757	set_proxy $ENV{http_proxy};	1154	set_proxy $ENV{http_proxy};
		1155	};
		1156
		1157	=head2 SOCKS PROXIES
		1158
		1159	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		1160	compile your perl to support socks, or use an external program such as
		1161	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		1162	transparently.
		1163
		1164	Alternatively, for AnyEvent::HTTP only, you can use your own
		1165	C<tcp_connect> function that does the proxy handshake - here is an example
		1166	that works with socks4a proxies:
		1167
		1168	use Errno;
		1169	use AnyEvent::Util;
		1170	use AnyEvent::Socket;
		1171	use AnyEvent::Handle;
		1172
		1173	# host, port and username of/for your socks4a proxy
		1174	my $socks_host = "10.0.0.23";
		1175	my $socks_port = 9050;
		1176	my $socks_user = "";
		1177
		1178	sub socks4a_connect {
		1179	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		1180
		1181	my $hdl = new AnyEvent::Handle
		1182	connect => [$socks_host, $socks_port],
		1183	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1184	on_error => sub { $connect_cb->() },
		1185	;
		1186
		1187	$hdl->push_write (pack "CCnNZ*Z*", 4, 1, $port, 1, $socks_user, $host);
		1188
		1189	$hdl->push_read (chunk => 8, sub {
		1190	my ($hdl, $chunk) = @_;
		1191	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1192
		1193	if ($status == 0x5a) {
		1194	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1195	} else {
		1196	$! = Errno::ENXIO; $connect_cb->();
		1197	}
		1198	});
		1199
		1200	$hdl
		1201	}
		1202
		1203	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1204	possibly after switching off other proxy types:
		1205
		1206	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1207
		1208	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1209	my ($data, $headers) = @_;
		1210	...
		1211	};
758		1212
759	=head1 SEE ALSO	1213	=head1 SEE ALSO
760		1214
761	L<AnyEvent>.	1215	L<AnyEvent>.
762		1216

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