ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/AnyEvent-HTTP/HTTP.pm

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.62 by root, Thu Dec 30 04:30:24 2010 UTC vs.
Revision 1.97 by root, Tue Jan 18 17:50:20 2011 UTC

…		…
15	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
16	run a supported event loop.	16	run a supported event loop.
17		17
18	This module implements a simple, stateless and non-blocking HTTP	18	This module implements a simple, stateless and non-blocking HTTP
19	client. It supports GET, POST and other request methods, cookies and more,	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	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	21	automatically limits the number of connections to the values specified in
22	the RFC.	22	the RFC.
23		23
24	It should generally be a "good client" that is enough for most HTTP	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	25	tasks. Simple tasks should be simple, but complex tasks should still be
…		…
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 5.0 ();	45	use AnyEvent 5.0 ();
47	use AnyEvent::Util ();	46	use AnyEvent::Util ();
48	use AnyEvent::Handle ();	47	use AnyEvent::Handle ();
49		48
50	use base Exporter::;	49	use base Exporter::;
51		50
52	our $VERSION = '1.46';	51	our $VERSION = '2.03';
53		52
54	our @EXPORT = qw(http_get http_post http_head http_request);	53	our @EXPORT = qw(http_get http_post http_head http_request);
55		54
56	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)";
57	our $MAX_RECURSE = 10;	56	our $MAX_RECURSE = 10;
58	our $MAX_PERSISTENT = 8;
59	our $PERSISTENT_TIMEOUT = 2;	57	our $PERSISTENT_TIMEOUT = 3;
60	our $TIMEOUT = 300;	58	our $TIMEOUT = 300;
61		59	our $MAX_PER_HOST = 4; # changing this is evil
62	# changing these is evil
63	our $MAX_PERSISTENT_PER_HOST = 0;
64	our $MAX_PER_HOST = 4;
65		60
66	our $PROXY;	61	our $PROXY;
67	our $ACTIVE = 0;	62	our $ACTIVE = 0;
68		63
69	my %KA_COUNT; # number of open keep-alive connections per host	64	my %KA_CACHE; # indexed by uhost currently, points to [$handle...] array
70	my %CO_SLOT; # number of open connections, and wait queue, per host	65	my %CO_SLOT; # number of open connections, and wait queue, per host
71		66
72	=item http_get $url, key => value..., $cb->($data, $headers)	67	=item http_get $url, key => value..., $cb->($data, $headers)
73		68
74	Executes an HTTP-GET request. See the http_request function for details on	69	Executes an HTTP-GET request. See the http_request function for details on
…		…
94	C<http_request> returns a "cancellation guard" - you have to keep the	89	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	90	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.	91	destroyed before the callback is called, the request will be cancelled.
97		92
98	The callback will be called with the response body data as first argument	93	The callback will be called with the response body data as first argument
99	(or C<undef> if an error occured), and a hash-ref with response headers as	94	(or C<undef> if an error occured), and a hash-ref with response headers
100	second argument.	95	(and trailers) as second argument.
101		96
102	All the headers in that hash are lowercased. In addition to the response	97	All the headers in that hash are lowercased. In addition to the response
103	headers, the "pseudo-headers" (uppercase to avoid clashing with possible	98	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
104	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the	99	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
105	three parts of the HTTP Status-Line of the same name.	100	three parts of the HTTP Status-Line of the same name. If an error occurs
		101	during the body phase of a request, then the original C<Status> and
		102	C<Reason> values from the header are available as C<OrigStatus> and
		103	C<OrigReason>.
106		104
107	The pseudo-header C<URL> contains the actual URL (which can differ from	105	The pseudo-header C<URL> contains the actual URL (which can differ from
108	the requested URL when following redirects - for example, you might get	106	the requested URL when following redirects - for example, you might get
109	an error that your URL scheme is not supported even though your URL is a	107	an error that your URL scheme is not supported even though your URL is a
110	valid http URL because it redirected to an ftp URL, in which case you can	108	valid http URL because it redirected to an ftp URL, in which case you can
…		…
119		117
120	If the server sends a header multiple times, then their contents will be	118	If the server sends a header multiple times, then their contents will be
121	joined together with a comma (C<,>), as per the HTTP spec.	119	joined together with a comma (C<,>), as per the HTTP spec.
122		120
123	If an internal error occurs, such as not being able to resolve a hostname,	121	If an internal error occurs, such as not being able to resolve a hostname,
124	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>	122	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be
125	(usually C<599>) and the C<Reason> pseudo-header will contain an error	123	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
126	message.	124	message. Currently the following status codes are used:
		125
		126	=over 4
		127
		128	=item 595 - errors during connection etsbalishment, proxy handshake.
		129
		130	=item 596 - errors during TLS negotiation, request sending and header processing.
		131
		132	=item 597 - errors during body receiving or processing.
		133
		134	=item 598 - user aborted request via C<on_header> or C<on_body>.
		135
		136	=item 599 - other, usually nonretryable, errors (garbled URL etc.).
		137
		138	=back
127		139
128	A typical callback might look like this:	140	A typical callback might look like this:
129		141
130	sub {	142	sub {
131	my ($body, $hdr) = @_;	143	my ($body, $hdr) = @_;
…		…
147	Whether to recurse requests or not, e.g. on redirects, authentication	159	Whether to recurse requests or not, e.g. on redirects, authentication
148	retries and so on, and how often to do so.	160	retries and so on, and how often to do so.
149		161
150	=item headers => hashref	162	=item headers => hashref
151		163
152	The request headers to use, with the header name (I<MUST be in lowercase>)	164	The request headers to use. Currently, C<http_request> may provide its own
153	as key and header value as hash value.	165	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
		166	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>
		167	(this can be suppressed by using C<undef> for these headers in which case
		168	they won't be sent at all).
154		169
155	Currently, http_request> may provide its own C<host>, C<content-length>,	170	You really should provide your own C<User-Agent:> header value that is
156	C<connection> and C<cookie> headers and will provide defaults for	171	appropriate for your program - I wouldn't be surprised if the default
157	C<user-agent> and C<referer> (this can be suppressed by using a value of	172	AnyEvent string gets blocked by webservers sooner or later.
158	C<undef> for these headers in which case they won't be sent at all).
159		173
160	=item timeout => $seconds	174	=item timeout => $seconds
161		175
162	The time-out to use for various stages - each connect attempt will reset	176	The time-out to use for various stages - each connect attempt will reset
163	the timeout, as will read or write activity, i.e. this is not an overall	177	the timeout, as will read or write activity, i.e. this is not an overall
…		…
168	=item proxy => [$host, $port[, $scheme]] or undef	182	=item proxy => [$host, $port[, $scheme]] or undef
169		183
170	Use the given http proxy for all requests. If not specified, then the	184	Use the given http proxy for all requests. If not specified, then the
171	default proxy (as specified by C<$ENV{http_proxy}>) is used.	185	default proxy (as specified by C<$ENV{http_proxy}>) is used.
172		186
173	C<$scheme> must be either missing, C<http> for HTTP or C<https> for	187	C<$scheme> must be either missing or must be C<http> for HTTP.
174	HTTPS.
175		188
176	=item body => $string	189	=item body => $string
177		190
178	The request body, usually empty. Will be-sent as-is (future versions of	191	The request body, usually empty. Will be sent as-is (future versions of
179	this module might offer more options).	192	this module might offer more options).
180		193
181	=item cookie_jar => $hash_ref	194	=item cookie_jar => $hash_ref
182		195
183	Passing this parameter enables (simplified) cookie-processing, loosely	196	Passing this parameter enables (simplified) cookie-processing, loosely
184	based on the original netscape specification.	197	based on the original netscape specification.
185		198
186	The C<$hash_ref> must be an (initially empty) hash reference which will	199	The C<$hash_ref> must be an (initially empty) hash reference which
187	get updated automatically. It is possible to save the cookie_jar to	200	will get updated automatically. It is possible to save the cookie jar
188	persistent storage with something like JSON or Storable, but this is not	201	to persistent storage with something like JSON or Storable - see the
189	recommended, as expiry times are currently being ignored.	202	C<AnyEvent::HTTP::cookie_jar_expire> function if you wish to remove
		203	expired or session-only cookies, and also for documentation on the format
		204	of the cookie jar.
190		205
191	Note that this cookie implementation is not of very high quality, nor	206	Note that this cookie implementation is not meant to be complete. If
192	meant to be complete. If you want complete cookie management you have to	207	you want complete cookie management you have to do that on your
193	do that on your own. C<cookie_jar> is meant as a quick fix to get some	208	own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites
194	cookie-using sites working. Cookies are a privacy disaster, do not use	209	working. Cookies are a privacy disaster, do not use them unless required
195	them unless required to.	210	to.
		211
		212	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
		213	headers will be set and handled by this module, otherwise they will be
		214	left untouched.
196		215
197	=item tls_ctx => $scheme | $tls_ctx	216	=item tls_ctx => $scheme | $tls_ctx
198		217
199	Specifies the AnyEvent::TLS context to be used for https connections. This	218	Specifies the AnyEvent::TLS context to be used for https connections. This
200	parameter follows the same rules as the C<tls_ctx> parameter to	219	parameter follows the same rules as the C<tls_ctx> parameter to
…		…
204	verification) TLS context.	223	verification) TLS context.
205		224
206	The default for this option is C<low>, which could be interpreted as "give	225	The default for this option is C<low>, which could be interpreted as "give
207	me the page, no matter what".	226	me the page, no matter what".
208		227
		228	See also the C<sessionid> parameter.
		229
		230	=item session => $string
		231
		232	The module might reuse connections to the same host internally. Sometimes
		233	(e.g. when using TLS), you do not want to reuse connections from other
		234	sessions. This can be achieved by setting this parameter to some unique
		235	ID (such as the address of an object storing your state data, or the TLS
		236	context) - only connections using the same unique ID will be reused.
		237
209	=item on_prepare => $callback->($fh)	238	=item on_prepare => $callback->($fh)
210		239
211	In rare cases you need to "tune" the socket before it is used to	240	In rare cases you need to "tune" the socket before it is used to
212	connect (for exmaple, to bind it on a given IP address). This parameter	241	connect (for exmaple, to bind it on a given IP address). This parameter
213	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	242	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
…		…
239		268
240	This callback is useful, among other things, to quickly reject unwanted	269	This callback is useful, among other things, to quickly reject unwanted
241	content, which, if it is supposed to be rare, can be faster than first	270	content, which, if it is supposed to be rare, can be faster than first
242	doing a C<HEAD> request.	271	doing a C<HEAD> request.
243		272
		273	The downside is that cancelling the request makes it impossible to re-use
		274	the connection. Also, the C<on_header> callback will not receive any
		275	trailer (headers sent after the response body).
		276
244	Example: cancel the request unless the content-type is "text/html".	277	Example: cancel the request unless the content-type is "text/html".
245		278
246	on_header => sub {	279	on_header => sub {
247	$_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/	280	$_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/
248	},	281	},
…		…
254	string instead of the body data.	287	string instead of the body data.
255		288
256	It has to return either true (in which case AnyEvent::HTTP will continue),	289	It has to return either true (in which case AnyEvent::HTTP will continue),
257	or false, in which case AnyEvent::HTTP will cancel the download (and call	290	or false, in which case AnyEvent::HTTP will cancel the download (and call
258	the completion callback with an error code of C<598>).	291	the completion callback with an error code of C<598>).
		292
		293	The downside to cancelling the request is that it makes it impossible to
		294	re-use the connection.
259		295
260	This callback is useful when the data is too large to be held in memory	296	This callback is useful when the data is too large to be held in memory
261	(so the callback writes it to a file) or when only some information should	297	(so the callback writes it to a file) or when only some information should
262	be extracted, or when the body should be processed incrementally.	298	be extracted, or when the body should be processed incrementally.
263		299
…		…
275	called. Instead of the C<$body> argument containing the body data, the	311	called. Instead of the C<$body> argument containing the body data, the
276	callback will receive the L<AnyEvent::Handle> object associated with the	312	callback will receive the L<AnyEvent::Handle> object associated with the
277	connection. In error cases, C<undef> will be passed. When there is no body	313	connection. In error cases, C<undef> will be passed. When there is no body
278	(e.g. status C<304>), the empty string will be passed.	314	(e.g. status C<304>), the empty string will be passed.
279		315
280	The handle object might or might not be in TLS mode, might be connected to	316	The handle object might or might not be in TLS mode, might be connected
281	a proxy, be a persistent connection etc., and configured in unspecified	317	to a proxy, be a persistent connection, use chunked transfer encoding
282	ways. The user is responsible for this handle (it will not be used by this	318	etc., and configured in unspecified ways. The user is responsible for this
283	module anymore).	319	handle (it will not be used by this module anymore).
284		320
285	This is useful with some push-type services, where, after the initial	321	This is useful with some push-type services, where, after the initial
286	headers, an interactive protocol is used (typical example would be the	322	headers, an interactive protocol is used (typical example would be the
287	push-style twitter API which starts a JSON/XML stream).	323	push-style twitter API which starts a JSON/XML stream).
288		324
289	If you think you need this, first have a look at C<on_body>, to see if	325	If you think you need this, first have a look at C<on_body>, to see if
290	that doesn't solve your problem in a better way.	326	that doesn't solve your problem in a better way.
291		327
		328	=item persistent => $boolean
		329
		330	Try to create/reuse a persistent connection. When this flag is set
		331	(default: true for idempotent requests, false for all others), then
		332	C<http_request> tries to re-use an existing (previously-created)
		333	persistent connection to the host and, failing that, tries to create a new
		334	one.
		335
		336	Requests failing in certain ways will be automatically retried once, which
		337	is dangerous for non-idempotent requests, which is why it defaults to off
		338	for them. The reason for this is because the bozos who designed HTTP/1.1
		339	made it impossible to distinguish between a fatal error and a normal
		340	connection timeout, so you never know whether there was a problem with
		341	your request or not.
		342
		343	When reusing an existent connection, many parameters (such as TLS context)
		344	will be ignored. See the C<session> parameter for a workaround.
		345
		346	=item keepalive => $boolean
		347
		348	Only used when C<persistent> is also true. This parameter decides whether
		349	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		350	(as opposed to only a HTTP/1.1 persistent connection).
		351
		352	The default is true, except when using a proxy, in which case it defaults
		353	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		354
		355	=item handle_params => { key => value ... }
		356
		357	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		358	constructor that is called - not all requests will create a handle, and
		359	sometimes more than one is created, so this parameter is only good for
		360	setting hints.
		361
		362	Example: set the maximum read size to 4096, to potentially conserve memory
		363	at the cost of speed.
		364
		365	handle_params => {
		366	max_read_size => 4096,
		367	},
		368
292	=back	369	=back
293		370
294	Example: make a simple HTTP GET request for http://www.nethype.de/	371	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		372	the response body.
295		373
296	http_request GET => "http://www.nethype.de/", sub {	374	http_request GET => "http://www.nethype.de/", sub {
297	my ($body, $hdr) = @_;	375	my ($body, $hdr) = @_;
298	print "$body\n";	376	print "$body\n";
299	};	377	};
300		378
301	Example: make a HTTP HEAD request on https://www.google.com/, use a	379	Example: do a HTTP HEAD request on https://www.google.com/, use a
302	timeout of 30 seconds.	380	timeout of 30 seconds.
303		381
304	http_request	382	http_request
305	GET => "https://www.google.com",	383	GET => "https://www.google.com",
		384	headers => { "user-agent" => "MySearchClient 1.0" },
306	timeout => 30,	385	timeout => 30,
307	sub {	386	sub {
308	my ($body, $hdr) = @_;	387	my ($body, $hdr) = @_;
309	use Data::Dumper;	388	use Data::Dumper;
310	print Dumper $hdr;	389	print Dumper $hdr;
311	}	390	}
312	;	391	;
313		392
314	Example: make another simple HTTP GET request, but immediately try to	393	Example: do another simple HTTP GET request, but immediately try to
315	cancel it.	394	cancel it.
316		395
317	my $request = http_request GET => "http://www.nethype.de/", sub {	396	my $request = http_request GET => "http://www.nethype.de/", sub {
318	my ($body, $hdr) = @_;	397	my ($body, $hdr) = @_;
319	print "$body\n";	398	print "$body\n";
320	};	399	};
321		400
322	undef $request;	401	undef $request;
323		402
324	=cut	403	=cut
		404
		405	#############################################################################
		406	# wait queue/slots
325		407
326	sub _slot_schedule;	408	sub _slot_schedule;
327	sub _slot_schedule($) {	409	sub _slot_schedule($) {
328	my $host = shift;	410	my $host = shift;
329		411
…		…
351	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	433	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
352		434
353	_slot_schedule $_[0];	435	_slot_schedule $_[0];
354	}	436	}
355		437
		438	#############################################################################
		439	# cookie handling
		440
		441	# expire cookies
		442	sub cookie_jar_expire($;$) {
		443	my ($jar, $session_end) = @_;
		444
		445	%$jar = () if $jar->{version} != 1;
		446
		447	my $anow = AE::now;
		448
		449	while (my ($chost, $paths) = each %$jar) {
		450	next unless ref $paths;
		451
		452	while (my ($cpath, $cookies) = each %$paths) {
		453	while (my ($cookie, $kv) = each %$cookies) {
		454	if (exists $kv->{_expires}) {
		455	delete $cookies->{$cookie}
		456	if $anow > $kv->{_expires};
		457	} elsif ($session_end) {
		458	delete $cookies->{$cookie};
		459	}
		460	}
		461
		462	delete $paths->{$cpath}
		463	unless %$cookies;
		464	}
		465
		466	delete $jar->{$chost}
		467	unless %$paths;
		468	}
		469	}
		470
		471	# extract cookies from jar
		472	sub cookie_jar_extract($$$$) {
		473	my ($jar, $scheme, $host, $path) = @_;
		474
		475	%$jar = () if $jar->{version} != 1;
		476
		477	my @cookies;
		478
		479	while (my ($chost, $paths) = each %$jar) {
		480	next unless ref $paths;
		481
		482	if ($chost =~ /^\./) {
		483	next unless $chost eq substr $host, -length $chost;
		484	} elsif ($chost =~ /\./) {
		485	next unless $chost eq $host;
		486	} else {
		487	next;
		488	}
		489
		490	while (my ($cpath, $cookies) = each %$paths) {
		491	next unless $cpath eq substr $path, 0, length $cpath;
		492
		493	while (my ($cookie, $kv) = each %$cookies) {
		494	next if $scheme ne "https" && exists $kv->{secure};
		495
		496	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
		497	delete $cookies->{$cookie};
		498	next;
		499	}
		500
		501	my $value = $kv->{value};
		502
		503	if ($value =~ /[=;,[:space:]]/) {
		504	$value =~ s/([\\"])/\\$1/g;
		505	$value = "\"$value\"";
		506	}
		507
		508	push @cookies, "$cookie=$value";
		509	}
		510	}
		511	}
		512
		513	\@cookies
		514	}
		515
		516	# parse set_cookie header into jar
		517	sub cookie_jar_set_cookie($$$$) {
		518	my ($jar, $set_cookie, $host, $date) = @_;
		519
		520	my $anow = int AE::now;
		521	my $snow; # server-now
		522
		523	for ($set_cookie) {
		524	# parse NAME=VALUE
		525	my @kv;
		526
		527	# expires is not http-compliant in the original cookie-spec,
		528	# we support the official date format and some extensions
		529	while (
		530	m{
		531	\G\s*
		532	(?:
		533	expires \s*=\s* ([A-Z][a-z][a-z]+,\ [^,;]+)
		534	| ([^=;,[:space:]]+) (?: \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) ) )?
		535	)
		536	}gcxsi
		537	) {
		538	my $name = $2;
		539	my $value = $4;
		540
		541	if (defined $1) {
		542	# expires
		543	$name = "expires";
		544	$value = $1;
		545	} elsif (defined $3) {
		546	# quoted
		547	$value = $3;
		548	$value =~ s/\\(.)/$1/gs;
		549	}
		550
		551	push @kv, @kv ? lc $name : $name, $value;
		552
		553	last unless /\G\s*;/gc;
		554	}
		555
		556	last unless @kv;
		557
		558	my $name = shift @kv;
		559	my %kv = (value => shift @kv, @kv);
		560
		561	if (exists $kv{"max-age"}) {
		562	$kv{_expires} = $anow + delete $kv{"max-age"};
		563	} elsif (exists $kv{expires}) {
		564	$snow ||= parse_date ($date) || $anow;
		565	$kv{_expires} = $anow + (parse_date (delete $kv{expires}) - $snow);
		566	} else {
		567	delete $kv{_expires};
		568	}
		569
		570	my $cdom;
		571	my $cpath = (delete $kv{path}) || "/";
		572
		573	if (exists $kv{domain}) {
		574	$cdom = delete $kv{domain};
		575
		576	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		577
		578	next if $cdom =~ /\.$/;
		579
		580	# this is not rfc-like and not netscape-like. go figure.
		581	my $ndots = $cdom =~ y/.//;
		582	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		583	} else {
		584	$cdom = $host;
		585	}
		586
		587	# store it
		588	$jar->{version} = 1;
		589	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
		590
		591	redo if /\G\s*,/gc;
		592	}
		593	}
		594
		595	#############################################################################
		596	# keepalive/persistent connection cache
		597
		598	# fetch a connection from the keepalive cache
		599	sub ka_fetch($) {
		600	my $ka_key = shift;
		601
		602	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		603	delete $KA_CACHE{$ka_key}
		604	unless @{ $KA_CACHE{$ka_key} };
		605
		606	$hdl
		607	}
		608
		609	sub ka_store($$) {
		610	my ($ka_key, $hdl) = @_;
		611
		612	my $kaa = $KA_CACHE{$ka_key} ||= [];
		613
		614	my $destroy = sub {
		615	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		616
		617	$hdl->destroy;
		618
		619	@ka
		620	? $KA_CACHE{$ka_key} = \@ka
		621	: delete $KA_CACHE{$ka_key};
		622	};
		623
		624	# on error etc., destroy
		625	$hdl->on_error ($destroy);
		626	$hdl->on_eof ($destroy);
		627	$hdl->on_read ($destroy);
		628	$hdl->timeout ($PERSISTENT_TIMEOUT);
		629
		630	push @$kaa, $hdl;
		631	shift @$kaa while @$kaa > $MAX_PER_HOST;
		632	}
		633
		634	#############################################################################
		635	# utilities
		636
		637	# continue to parse $_ for headers and place them into the arg
		638	sub _parse_hdr() {
		639	my %hdr;
		640
		641	# things seen, not parsed:
		642	# p3pP="NON CUR OTPi OUR NOR UNI"
		643
		644	$hdr{lc $1} .= ",$2"
		645	while /\G
		646	([^:\000-\037]*):
		647	[\011\040]*
		648	((?: [^\012]+ | \012[\011\040] )*)
		649	\012
		650	/gxc;
		651
		652	/\G$/
		653	or return;
		654
		655	# remove the "," prefix we added to all headers above
		656	substr $_, 0, 1, ""
		657	for values %hdr;
		658
		659	\%hdr
		660	}
		661
		662	#############################################################################
		663	# http_get
		664
356	our $qr_nlnl = qr{(?<![^\012])\015?\012};	665	our $qr_nlnl = qr{(?<![^\012])\015?\012};
357		666
358	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	667	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
359	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	668	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		669
		670	# maybe it should just become a normal object :/
		671
		672	sub _destroy_state(\%) {
		673	my ($state) = @_;
		674
		675	$state->{handle}->destroy if $state->{handle};
		676	%$state = ();
		677	}
		678
		679	sub _error(\%$$) {
		680	my ($state, $cb, $hdr) = @_;
		681
		682	&_destroy_state ($state);
		683
		684	$cb->(undef, $hdr);
		685	()
		686	}
360		687
361	sub http_request($$@) {	688	sub http_request($$@) {
362	my $cb = pop;	689	my $cb = pop;
363	my ($method, $url, %arg) = @_;	690	my ($method, $url, %arg) = @_;
364		691
…		…
379	my @pseudo = (URL => $url);	706	my @pseudo = (URL => $url);
380	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};	707	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
381		708
382	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	709	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
383		710
384	return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })	711	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
385	if $recurse < 0;	712	if $recurse < 0;
386		713
387	my $proxy = $arg{proxy} || $PROXY;	714	my $proxy = $arg{proxy} || $PROXY;
388	my $timeout = $arg{timeout} || $TIMEOUT;	715	my $timeout = $arg{timeout} || $TIMEOUT;
389		716
390	my ($uscheme, $uauthority, $upath, $query, $fragment) =	717	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
391	$url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;	718	$url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
392		719
393	$uscheme = lc $uscheme;	720	$uscheme = lc $uscheme;
394		721
395	my $uport = $uscheme eq "http" ? 80	722	my $uport = $uscheme eq "http" ? 80
396	: $uscheme eq "https" ? 443	723	: $uscheme eq "https" ? 443
397	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", @pseudo });	724	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
398		725
399	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	726	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
400	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });	727	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
401		728
402	my $uhost = $1;	729	my $uhost = lc $1;
403	$uport = $2 if defined $2;	730	$uport = $2 if defined $2;
404		731
405	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	732	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
406	unless exists $hdr{host};	733	unless exists $hdr{host};
407		734
…		…
410		737
411	$upath =~ s%^/?%/%;	738	$upath =~ s%^/?%/%;
412		739
413	# cookie processing	740	# cookie processing
414	if (my $jar = $arg{cookie_jar}) {	741	if (my $jar = $arg{cookie_jar}) {
415	%$jar = () if $jar->{version} != 1;	742	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
416		743
417	my @cookie;
418
419	while (my ($chost, $v) = each %$jar) {
420	if ($chost =~ /^\./) {
421	next unless $chost eq substr $uhost, -length $chost;
422	} elsif ($chost =~ /\./) {
423	next unless $chost eq $uhost;
424	} else {
425	next;
426	}
427
428	while (my ($cpath, $v) = each %$v) {
429	next unless $cpath eq substr $upath, 0, length $cpath;
430
431	while (my ($k, $v) = each %$v) {
432	next if $uscheme ne "https" && exists $v->{secure};
433	my $value = $v->{value};
434	$value =~ s/([\\"])/\\$1/g;
435	push @cookie, "$k=\"$value\"";
436	}
437	}
438	}
439
440	$hdr{cookie} = join "; ", @cookie	744	$hdr{cookie} = join "; ", @$cookies
441	if @cookie;	745	if @$cookies;
442	}	746	}
443		747
444	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path	748	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
445		749
446	if ($proxy) {	750	if ($proxy) {
…		…
449	$rscheme = "http" unless defined $rscheme;	753	$rscheme = "http" unless defined $rscheme;
450		754
451	# don't support https requests over https-proxy transport,	755	# don't support https requests over https-proxy transport,
452	# can't be done with tls as spec'ed, unless you double-encrypt.	756	# can't be done with tls as spec'ed, unless you double-encrypt.
453	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	757	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		758
		759	$rhost = lc $rhost;
		760	$rscheme = lc $rscheme;
454	} else {	761	} else {
455	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	762	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
456	}	763	}
457		764
458	# leave out fragment and query string, just a heuristic	765	# leave out fragment and query string, just a heuristic
459	$hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};	766	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
460	$hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};	767	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
461		768
462	$hdr{"content-length"} = length $arg{body}	769	$hdr{"content-length"} = length $arg{body}
463	if length $arg{body} || $method ne "GET";	770	if length $arg{body} || $method ne "GET";
464		771
		772	my $idempotent = $method =~ /^(?:GET|HEAD|PUT|DELETE|OPTIONS|TRACE)$/;
		773
		774	# default value for keepalive is true iff the request is for an idempotent method
		775	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : $idempotent;
		776	my $keepalive10 = exists $arg{keepalive10} ? $arg{keepalive10} : !$proxy;
		777	my $keptalive; # true if this is actually a recycled connection
		778
		779	# the key to use in the keepalive cache
		780	my $ka_key = "$uhost\x00$arg{sessionid}";
		781
		782	$hdr{connection} = ($keepalive ? $keepalive10 ? "keep-alive " : "" : "close ") . "Te"; #1.1
		783	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
		784
465	my %state = (connect_guard => 1);	785	my %state = (connect_guard => 1);
		786
		787	my $ae_error = 595; # connecting
		788
		789	# handle actual, non-tunneled, request
		790	my $handle_actual_request = sub {
		791	$ae_error = 596; # request phase
		792
		793	my $hdl = $state{handle};
		794
		795	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
		796
		797	# send request
		798	$hdl->push_write (
		799	"$method $rpath HTTP/1.1\015\012"
		800	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		801	. "\015\012"
		802	. (delete $arg{body})
		803	);
		804
		805	# return if error occured during push_write()
		806	return unless %state;
		807
		808	# reduce memory usage, save a kitten, also re-use it for the response headers.
		809	%hdr = ();
		810
		811	# status line and headers
		812	$state{read_response} = sub {
		813	return unless %state;
		814
		815	for ("$_[1]") {
		816	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		817
		818	/^HTTP\/0*([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/gxci
		819	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
		820
		821	# 100 Continue handling
		822	# should not happen as we don't send expect: 100-continue,
		823	# but we handle it just in case.
		824	# since we send the request body regardless, if we get an error
		825	# we are out of-sync, which we currently do NOT handle correctly.
		826	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		827	if $2 eq 100;
		828
		829	push @pseudo,
		830	HTTPVersion => $1,
		831	Status => $2,
		832	Reason => $3,
		833	;
		834
		835	my $hdr = _parse_hdr
		836	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
		837
		838	%hdr = (%$hdr, @pseudo);
		839	}
		840
		841	# redirect handling
		842	# microsoft and other shitheads don't give a shit for following standards,
		843	# try to support some common forms of broken Location headers.
		844	if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
		845	$hdr{location} =~ s/^\.\/+//;
		846
		847	my $url = "$rscheme://$uhost:$uport";
		848
		849	unless ($hdr{location} =~ s/^\///) {
		850	$url .= $upath;
		851	$url =~ s/\/[^\/]*$//;
		852	}
		853
		854	$hdr{location} = "$url/$hdr{location}";
		855	}
		856
		857	my $redirect;
		858
		859	if ($recurse) {
		860	my $status = $hdr{Status};
		861
		862	# industry standard is to redirect POST as GET for
		863	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		864	# also, the UA should ask the user for 301 and 307 and POST,
		865	# industry standard seems to be to simply follow.
		866	# we go with the industry standard.
		867	if ($status == 301 or $status == 302 or $status == 303) {
		868	# HTTP/1.1 is unclear on how to mutate the method
		869	$method = "GET" unless $method eq "HEAD";
		870	$redirect = 1;
		871	} elsif ($status == 307) {
		872	$redirect = 1;
		873	}
		874	}
		875
		876	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
		877	if ($state{handle}) {
		878	# handle keepalive
		879	if (
		880	$keepalive
		881	&& $_[3]
		882	&& ($hdr{HTTPVersion} < 1.1
		883	? $hdr{connection} =~ /\bkeep-?alive\b/i
		884	: $hdr{connection} !~ /\bclose\b/i)
		885	) {
		886	ka_store $ka_key, delete $state{handle};
		887	} else {
		888	# no keepalive, destroy the handle
		889	$state{handle}->destroy;
		890	}
		891	}
		892
		893	%state = ();
		894
		895	if (defined $_[1]) {
		896	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		897	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		898	}
		899
		900	# set-cookie processing
		901	if ($arg{cookie_jar}) {
		902	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		903	}
		904
		905	if ($redirect && exists $hdr{location}) {
		906	# we ignore any errors, as it is very common to receive
		907	# Content-Length != 0 but no actual body
		908	# we also access %hdr, as $_[1] might be an erro
		909	http_request (
		910	$method => $hdr{location},
		911	%arg,
		912	recurse => $recurse - 1,
		913	Redirect => [$_[0], \%hdr],
		914	$cb
		915	);
		916	} else {
		917	$cb->($_[0], \%hdr);
		918	}
		919	};
		920
		921	$ae_error = 597; # body phase
		922
		923	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		924
		925	my $len = $chunked ? undef : $hdr{"content-length"};
		926
		927	# body handling, many different code paths
		928	# - no body expected
		929	# - want_body_handle
		930	# - te chunked
		931	# - 2x length known (with or without on_body)
		932	# - 2x length not known (with or without on_body)
		933	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		934	$finish->(undef, 598 => "Request cancelled by on_header");
		935	} elsif (
		936	$hdr{Status} =~ /^(?:1..|204|205|304)$/
		937	or $method eq "HEAD"
		938	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		939	) {
		940	# no body
		941	$finish->("", undef, undef, 1);
		942
		943	} elsif (!$redirect && $arg{want_body_handle}) {
		944	$_[0]->on_eof (undef);
		945	$_[0]->on_error (undef);
		946	$_[0]->on_read (undef);
		947
		948	$finish->(delete $state{handle});
		949
		950	} elsif ($chunked) {
		951	my $cl = 0;
		952	my $body = "";
		953	my $on_body = $arg{on_body} || sub { $body .= shift; 1 };
		954
		955	$state{read_chunk} = sub {
		956	$_[1] =~ /^([0-9a-fA-F]+)/
		957	or $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		958
		959	my $len = hex $1;
		960
		961	if ($len) {
		962	$cl += $len;
		963
		964	$_[0]->push_read (chunk => $len, sub {
		965	$on_body->($_[1], \%hdr)
		966	or return $finish->(undef, 598 => "Request cancelled by on_body");
		967
		968	$_[0]->push_read (line => sub {
		969	length $_[1]
		970	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		971	$_[0]->push_read (line => $state{read_chunk});
		972	});
		973	});
		974	} else {
		975	$hdr{"content-length"} ||= $cl;
		976
		977	$_[0]->push_read (line => $qr_nlnl, sub {
		978	if (length $_[1]) {
		979	for ("$_[1]") {
		980	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		981
		982	my $hdr = _parse_hdr
		983	or return $finish->(undef, $ae_error => "Garbled response trailers");
		984
		985	%hdr = (%hdr, %$hdr);
		986	}
		987	}
		988
		989	$finish->($body, undef, undef, 1);
		990	});
		991	}
		992	};
		993
		994	$_[0]->push_read (line => $state{read_chunk});
		995
		996	} elsif ($arg{on_body}) {
		997	if (defined $len) {
		998	$_[0]->on_read (sub {
		999	$len -= length $_[0]{rbuf};
		1000
		1001	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1002	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1003
		1004	$len > 0
		1005	or $finish->("", undef, undef, 1);
		1006	});
		1007	} else {
		1008	$_[0]->on_eof (sub {
		1009	$finish->("");
		1010	});
		1011	$_[0]->on_read (sub {
		1012	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1013	or $finish->(undef, 598 => "Request cancelled by on_body");
		1014	});
		1015	}
		1016	} else {
		1017	$_[0]->on_eof (undef);
		1018
		1019	if (defined $len) {
		1020	$_[0]->on_read (sub {
		1021	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1022	if $len <= length $_[0]{rbuf};
		1023	});
		1024	} else {
		1025	$_[0]->on_error (sub {
		1026	($! == Errno::EPIPE || !$!)
		1027	? $finish->(delete $_[0]{rbuf})
		1028	: $finish->(undef, $ae_error => $_[2]);
		1029	});
		1030	$_[0]->on_read (sub { });
		1031	}
		1032	}
		1033	};
		1034
		1035	# if keepalive is enabled, then the server closing the connection
		1036	# before a response can happen legally - we retry on idempotent methods.
		1037	if ($keptalive && $idempotent) {
		1038	my $old_eof = $hdl->{on_eof};
		1039	$hdl->{on_eof} = sub {
		1040	_destroy_state %state;
		1041
		1042	http_request (
		1043	$method => $url,
		1044	%arg,
		1045	keepalive => 0,
		1046	$cb
		1047	);
		1048	};
		1049	$hdl->on_read (sub {
		1050	return unless %state;
		1051
		1052	# as soon as we receive something, a connection close
		1053	# once more becomes a hard error
		1054	$hdl->{on_eof} = $old_eof;
		1055	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1056	});
		1057	} else {
		1058	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1059	}
		1060	};
		1061
		1062	my $prepare_handle = sub {
		1063	my ($hdl) = $state{handle};
		1064
		1065	$hdl->timeout ($timeout);
		1066	$hdl->on_error (sub {
		1067	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1068	});
		1069	$hdl->on_eof (sub {
		1070	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1071	});
		1072	};
		1073
		1074	# connected to proxy (or origin server)
		1075	my $connect_cb = sub {
		1076	my $fh = shift
		1077	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1078
		1079	return unless delete $state{connect_guard};
		1080
		1081	# get handle
		1082	$state{handle} = new AnyEvent::Handle
		1083	%{ $arg{handle_params} },
		1084	fh => $fh,
		1085	peername => $uhost,
		1086	tls_ctx => $arg{tls_ctx},
		1087	;
		1088
		1089	$prepare_handle->();
		1090
		1091	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1092
		1093	# now handle proxy-CONNECT method
		1094	if ($proxy && $uscheme eq "https") {
		1095	# oh dear, we have to wrap it into a connect request
		1096
		1097	# maybe re-use $uauthority with patched port?
		1098	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012");
		1099	$state{handle}->push_read (line => $qr_nlnl, sub {
		1100	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1101	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1102
		1103	if ($2 == 200) {
		1104	$rpath = $upath;
		1105	$handle_actual_request->();
		1106	} else {
		1107	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1108	}
		1109	});
		1110	} else {
		1111	$handle_actual_request->();
		1112	}
		1113	};
466		1114
467	_get_slot $uhost, sub {	1115	_get_slot $uhost, sub {
468	$state{slot_guard} = shift;	1116	$state{slot_guard} = shift;
469		1117
470	return unless $state{connect_guard};	1118	return unless $state{connect_guard};
471		1119
		1120	# try to use an existing keepalive connection, but only if we, ourselves, plan
		1121	# on a keepalive request (in theory, this should be a separate config option).
		1122	if ($keepalive && $KA_CACHE{$ka_key}) {
		1123	$keptalive = 1;
		1124	$state{handle} = ka_fetch $ka_key;
		1125	$prepare_handle->();
		1126	$handle_actual_request->();
		1127
		1128	} else {
472	my $tcp_connect = $arg{tcp_connect}	1129	my $tcp_connect = $arg{tcp_connect}
473	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1130	|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
474		1131
475	$state{connect_guard} = $tcp_connect->(	1132	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });
476	$rhost,
477	$rport,
478	sub {
479	$state{fh} = shift
480	or do {
481	my $err = "$!";
482	%state = ();
483	return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
484	};
485
486	pop; # free memory, save a tree
487
488	return unless delete $state{connect_guard};
489
490	# get handle
491	$state{handle} = new AnyEvent::Handle
492	fh => $state{fh},
493	peername => $rhost,
494	tls_ctx => $arg{tls_ctx},
495	# these need to be reconfigured on keepalive handles
496	timeout => $timeout,
497	on_error => sub {
498	%state = ();
499	$cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
500	},
501	on_eof => sub {
502	%state = ();
503	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
504	},
505	;
506
507	# limit the number of persistent connections
508	# keepalive not yet supported
509	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
510	# ++$KA_COUNT{$_[1]};
511	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
512	# --$KA_COUNT{$_[1]}
513	# };
514	# $hdr{connection} = "keep-alive";
515	# } else {
516	delete $hdr{connection};
517	# }
518
519	$state{handle}->starttls ("connect") if $rscheme eq "https";
520
521	# handle actual, non-tunneled, request
522	my $handle_actual_request = sub {
523	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
524
525	# send request
526	$state{handle}->push_write (
527	"$method $rpath HTTP/1.0\015\012"
528	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
529	. "\015\012"
530	. (delete $arg{body})
531	);
532
533	# return if error occured during push_write()
534	return unless %state;
535
536	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
537
538	# status line and headers
539	$state{handle}->push_read (line => $qr_nlnl, sub {
540	for ("$_[1]") {
541	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
542
543	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc
544	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response", @pseudo }));
545
546	push @pseudo,
547	HTTPVersion => $1,
548	Status => $2,
549	Reason => $3,
550	;
551
552	# things seen, not parsed:
553	# p3pP="NON CUR OTPi OUR NOR UNI"
554
555	$hdr{lc $1} .= ",$2"
556	while /\G
557	([^:\000-\037]*):
558	[\011\040]*
559	((?: [^\012]+ | \012[\011\040] )*)
560	\012
561	/gxc;
562
563	/\G$/
564	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", @pseudo }));
565	}
566
567	# remove the "," prefix we added to all headers above
568	substr $_, 0, 1, ""
569	for values %hdr;
570
571	# patch in all pseudo headers
572	%hdr = (%hdr, @pseudo);
573
574	# redirect handling
575	# microsoft and other shitheads don't give a shit for following standards,
576	# try to support some common forms of broken Location headers.
577	if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
578	$hdr{location} =~ s/^\.\/+//;
579
580	my $url = "$rscheme://$uhost:$uport";
581
582	unless ($hdr{location} =~ s/^\///) {
583	$url .= $upath;
584	$url =~ s/\/[^\/]*$//;
585	}
586
587	$hdr{location} = "$url/$hdr{location}";
588	}
589
590	my $redirect;
591
592	if ($recurse) {
593	my $status = $hdr{Status};
594
595	# industry standard is to redirect POST as GET for
596	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
597	# also, the UA should ask the user for 301 and 307 and POST,
598	# industry standard seems to be to simply follow.
599	# we go with the industry standard.
600	if ($status == 301 or $status == 302 or $status == 303) {
601	# HTTP/1.1 is unclear on how to mutate the method
602	$method = "GET" unless $method eq "HEAD";
603	$redirect = 1;
604	} elsif ($status == 307) {
605	$redirect = 1;
606	}
607	}
608
609	my $finish = sub {
610	$state{handle}->destroy if $state{handle};
611	%state = ();
612
613	# set-cookie processing
614	if ($arg{cookie_jar}) {
615	for ($_[1]{"set-cookie"}) {
616	# parse NAME=VALUE
617	my @kv;
618
619	while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
620	my $name = $1;
621	my $value = $3;
622
623	unless ($value) {
624	$value = $2;
625	$value =~ s/\\(.)/$1/gs;
626	}
627
628	push @kv, $name => $value;
629
630	last unless /\G\s*;/gc;
631	}
632
633	last unless @kv;
634
635	my $name = shift @kv;
636	my %kv = (value => shift @kv, @kv);
637
638	my $cdom;
639	my $cpath = (delete $kv{path}) || "/";
640
641	if (exists $kv{domain}) {
642	$cdom = delete $kv{domain};
643		1133	}
644	$cdom =~ s/^\.?/./; # make sure it starts with a "."
645
646	next if $cdom =~ /\.$/;
647
648	# this is not rfc-like and not netscape-like. go figure.
649	my $ndots = $cdom =~ y/.//;
650	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
651	} else {
652	$cdom = $uhost;
653	}
654
655	# store it
656	$arg{cookie_jar}{version} = 1;
657	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
658
659	redo if /\G\s*,/gc;
660	}
661	}
662
663	if ($redirect && exists $hdr{location}) {
664	# we ignore any errors, as it is very common to receive
665	# Content-Length != 0 but no actual body
666	# we also access %hdr, as $_[1] might be an erro
667	http_request (
668	$method => $hdr{location},
669	%arg,
670	recurse => $recurse - 1,
671	Redirect => \@_,
672	$cb);
673	} else {
674	$cb->($_[0], $_[1]);
675	}
676	};
677
678	my $len = $hdr{"content-length"};
679
680	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
681	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
682	} elsif (
683	$hdr{Status} =~ /^(?:1..|[23]04)$/
684	or $method eq "HEAD"
685	or (defined $len && !$len)
686	) {
687	# no body
688	$finish->("", \%hdr);
689	} else {
690	# body handling, four different code paths
691	# for want_body_handle, on_body (2x), normal (2x)
692	# we might read too much here, but it does not matter yet (no pers. connections)
693	if (!$redirect && $arg{want_body_handle}) {
694	$_[0]->on_eof (undef);
695	$_[0]->on_error (undef);
696	$_[0]->on_read (undef);
697
698	$finish->(delete $state{handle}, \%hdr);
699
700	} elsif ($arg{on_body}) {
701	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
702	if ($len) {
703	$_[0]->on_eof (undef);
704	$_[0]->on_read (sub {
705	$len -= length $_[0]{rbuf};
706
707	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
708	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
709
710	$len > 0
711	or $finish->("", \%hdr);
712	});
713	} else {
714	$_[0]->on_eof (sub {
715	$finish->("", \%hdr);
716	});
717	$_[0]->on_read (sub {
718	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
719	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
720	});
721	}
722	} else {
723	$_[0]->on_eof (undef);
724
725	if ($len) {
726	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
727	$_[0]->on_read (sub {
728	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
729	if $len <= length $_[0]{rbuf};
730	});
731	} else {
732	$_[0]->on_error (sub {
733	($! == Errno::EPIPE || !$!)
734	? $finish->(delete $_[0]{rbuf}, \%hdr)
735	: $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
736	});
737	$_[0]->on_read (sub { });
738	}
739	}
740	}
741	});
742	};
743
744	# now handle proxy-CONNECT method
745	if ($proxy && $uscheme eq "https") {
746	# oh dear, we have to wrap it into a connect request
747
748	# maybe re-use $uauthority with patched port?
749	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
750	$state{handle}->push_read (line => $qr_nlnl, sub {
751	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
752	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", @pseudo }));
753
754	if ($2 == 200) {
755	$rpath = $upath;
756	&$handle_actual_request;
757	} else {
758	%state = ();
759	$cb->(undef, { Status => $2, Reason => $3, @pseudo });
760	}
761	});
762	} else {
763	&$handle_actual_request;
764	}
765
766	},
767	$arg{on_prepare} || sub { $timeout }
768	);
769	};	1134	};
770		1135
771	defined wantarray && AnyEvent::Util::guard { %state = () }	1136	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
772	}	1137	}
773		1138
774	sub http_get($@) {	1139	sub http_get($@) {
775	unshift @_, "GET";	1140	unshift @_, "GET";
776	&http_request	1141	&http_request
…		…
794	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1159	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
795	the actual connection, which in turn uses AnyEvent::DNS to resolve	1160	the actual connection, which in turn uses AnyEvent::DNS to resolve
796	hostnames. The latter is a simple stub resolver and does no caching	1161	hostnames. The latter is a simple stub resolver and does no caching
797	on its own. If you want DNS caching, you currently have to provide	1162	on its own. If you want DNS caching, you currently have to provide
798	your own default resolver (by storing a suitable resolver object in	1163	your own default resolver (by storing a suitable resolver object in
799	C<$AnyEvent::DNS::RESOLVER>).	1164	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
800		1165
801	=head2 GLOBAL FUNCTIONS AND VARIABLES	1166	=head2 GLOBAL FUNCTIONS AND VARIABLES
802		1167
803	=over 4	1168	=over 4
804		1169
805	=item AnyEvent::HTTP::set_proxy "proxy-url"	1170	=item AnyEvent::HTTP::set_proxy "proxy-url"
806		1171
807	Sets the default proxy server to use. The proxy-url must begin with a	1172	Sets the default proxy server to use. The proxy-url must begin with a
808	string of the form C<http://host:port> (optionally C<https:...>), croaks	1173	string of the form C<http://host:port>, croaks otherwise.
809	otherwise.
810		1174
811	To clear an already-set proxy, use C<undef>.	1175	To clear an already-set proxy, use C<undef>.
		1176
		1177	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
		1178
		1179	Remove all cookies from the cookie jar that have been expired. If
		1180	C<$session_end> is given and true, then additionally remove all session
		1181	cookies.
		1182
		1183	You should call this function (with a true C<$session_end>) before you
		1184	save cookies to disk, and you should call this function after loading them
		1185	again. If you have a long-running program you can additonally call this
		1186	function from time to time.
		1187
		1188	A cookie jar is initially an empty hash-reference that is managed by this
		1189	module. It's format is subject to change, but currently it is like this:
		1190
		1191	The key C<version> has to contain C<1>, otherwise the hash gets
		1192	emptied. All other keys are hostnames or IP addresses pointing to
		1193	hash-references. The key for these inner hash references is the
		1194	server path for which this cookie is meant, and the values are again
		1195	hash-references. The keys of those hash-references is the cookie name, and
		1196	the value, you guessed it, is another hash-reference, this time with the
		1197	key-value pairs from the cookie, except for C<expires> and C<max-age>,
		1198	which have been replaced by a C<_expires> key that contains the cookie
		1199	expiry timestamp.
		1200
		1201	Here is an example of a cookie jar with a single cookie, so you have a
		1202	chance of understanding the above paragraph:
		1203
		1204	{
		1205	version => 1,
		1206	"10.0.0.1" => {
		1207	"/" => {
		1208	"mythweb_id" => {
		1209	_expires => 1293917923,
		1210	value => "ooRung9dThee3ooyXooM1Ohm",
		1211	},
		1212	},
		1213	},
		1214	}
812		1215
813	=item $date = AnyEvent::HTTP::format_date $timestamp	1216	=item $date = AnyEvent::HTTP::format_date $timestamp
814		1217
815	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP	1218	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
816	Date (RFC 2616).	1219	Date (RFC 2616).
817		1220
818	=item $timestamp = AnyEvent::HTTP::parse_date $date	1221	=item $timestamp = AnyEvent::HTTP::parse_date $date
819		1222
820	Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX	1223	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
		1224	bunch of minor variations of those, and returns the corresponding POSIX
821	timestamp, or C<undef> if the date cannot be parsed.	1225	timestamp, or C<undef> if the date cannot be parsed.
822		1226
823	=item $AnyEvent::HTTP::MAX_RECURSE	1227	=item $AnyEvent::HTTP::MAX_RECURSE
824		1228
825	The default value for the C<recurse> request parameter (default: C<10>).	1229	The default value for the C<recurse> request parameter (default: C<10>).
		1230
		1231	=item $AnyEvent::HTTP::TIMEOUT
		1232
		1233	The default timeout for conenction operations (default: C<300>).
826		1234
827	=item $AnyEvent::HTTP::USERAGENT	1235	=item $AnyEvent::HTTP::USERAGENT
828		1236
829	The default value for the C<User-Agent> header (the default is	1237	The default value for the C<User-Agent> header (the default is
830	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1238	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
831		1239
832	=item $AnyEvent::HTTP::MAX_PER_HOST	1240	=item $AnyEvent::HTTP::MAX_PER_HOST
833		1241
834	The maximum number of concurrent connections to the same host (identified	1242	The maximum number of concurrent connections to the same host (identified
835	by the hostname). If the limit is exceeded, then the additional requests	1243	by the hostname). If the limit is exceeded, then the additional requests
836	are queued until previous connections are closed.	1244	are queued until previous connections are closed. Both persistent and
		1245	non-persistent connections are counted in this limit.
837		1246
838	The default value for this is C<4>, and it is highly advisable to not	1247	The default value for this is C<4>, and it is highly advisable to not
839	increase it.	1248	increase it much.
		1249
		1250	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1251	connections, older browsers used 2, newers (such as firefox 3) typically
		1252	use 6, and Opera uses 8 because like, they have the fastest browser and
		1253	give a shit for everybody else on the planet.
		1254
		1255	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1256
		1257	The time after which idle persistent conenctions get closed by
		1258	AnyEvent::HTTP (default: C<3>).
840		1259
841	=item $AnyEvent::HTTP::ACTIVE	1260	=item $AnyEvent::HTTP::ACTIVE
842		1261
843	The number of active connections. This is not the number of currently	1262	The number of active connections. This is not the number of currently
844	running requests, but the number of currently open and non-idle TCP	1263	running requests, but the number of currently open and non-idle TCP
845	connections. This number of can be useful for load-leveling.	1264	connections. This number can be useful for load-leveling.
846		1265
847	=back	1266	=back
848		1267
849	=cut	1268	=cut
850		1269
…		…
865	sub parse_date($) {	1284	sub parse_date($) {
866	my ($date) = @_;	1285	my ($date) = @_;
867		1286
868	my ($d, $m, $y, $H, $M, $S);	1287	my ($d, $m, $y, $H, $M, $S);
869		1288
870	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$/) {	1289	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$/) {
871	# RFC 822/1123, required by RFC 2616	1290	# RFC 822/1123, required by RFC 2616 (with " ")
		1291	# cookie dates (with "-")
		1292
872	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);	1293	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
873		1294
874	} 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$/) {	1295	} 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$/) {
875	# RFC 850	1296	# RFC 850
876	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);	1297	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
877		1298
878	} 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])$/) {	1299	} 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])$/) {
879	# ISO C's asctime	1300	# ISO C's asctime
880	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);	1301	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
881	}	1302	}
882	# other formats fail in the loop below	1303	# other formats fail in the loop below
883		1304
…		…
891	undef	1312	undef
892	}	1313	}
893		1314
894	sub set_proxy($) {	1315	sub set_proxy($) {
895	if (length $_[0]) {	1316	if (length $_[0]) {
896	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1317	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
897	or Carp::croak "$_[0]: invalid proxy URL";	1318	or Carp::croak "$_[0]: invalid proxy URL";
898	$PROXY = [$2, $3 || 3128, $1]	1319	$PROXY = [$2, $3 || 3128, $1]
899	} else {	1320	} else {
900	undef $PROXY;	1321	undef $PROXY;
901	}	1322	}
…		…
904	# initialise proxy from environment	1325	# initialise proxy from environment
905	eval {	1326	eval {
906	set_proxy $ENV{http_proxy};	1327	set_proxy $ENV{http_proxy};
907	};	1328	};
908		1329
		1330	=head2 SHOWCASE
		1331
		1332	This section contaisn some more elaborate "real-world" examples or code
		1333	snippets.
		1334
		1335	=head2 HTTP/1.1 FILE DOWNLOAD
		1336
		1337	Downloading files with HTTP can be quite tricky, especially when something
		1338	goes wrong and you want tor esume.
		1339
		1340	Here is a function that initiates and resumes a download. It uses the
		1341	last modified time to check for file content changes, and works with many
		1342	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1343	on older servers.
		1344
		1345	It calls the completion callback with either C<undef>, which means a
		1346	nonretryable error occured, C<0> when the download was partial and should
		1347	be retried, and C<1> if it was successful.
		1348
		1349	use AnyEvent::HTTP;
		1350
		1351	sub download($$$) {
		1352	my ($url, $file, $cb) = @_;
		1353
		1354	open my $fh, "+<", $file
		1355	or die "$file: $!";
		1356
		1357	my %hdr;
		1358	my $ofs = 0;
		1359
		1360	warn stat $fh;
		1361	warn -s _;
		1362	if (stat $fh and -s _) {
		1363	$ofs = -s _;
		1364	warn "-s is ", $ofs;#d#
		1365	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1366	$hdr{"range"} = "bytes=$ofs-";
		1367	}
		1368
		1369	http_get $url,
		1370	headers => \%hdr,
		1371	on_header => sub {
		1372	my ($hdr) = @_;
		1373
		1374	if ($hdr->{Status} == 200 && $ofs) {
		1375	# resume failed
		1376	truncate $fh, $ofs = 0;
		1377	}
		1378
		1379	sysseek $fh, $ofs, 0;
		1380
		1381	1
		1382	},
		1383	on_body => sub {
		1384	my ($data, $hdr) = @_;
		1385
		1386	if ($hdr->{Status} =~ /^2/) {
		1387	length $data == syswrite $fh, $data
		1388	or return; # abort on write errors
		1389	}
		1390
		1391	1
		1392	},
		1393	sub {
		1394	my (undef, $hdr) = @_;
		1395
		1396	my $status = $hdr->{Status};
		1397
		1398	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1399	utime $fh, $time, $time;
		1400	}
		1401
		1402	if ($status == 200 || $status == 206 || $status == 416) {
		1403	# download ok || resume ok || file already fully downloaded
		1404	$cb->(1, $hdr);
		1405
		1406	} elsif ($status == 412) {
		1407	# file has changed while resuming, delete and retry
		1408	unlink $file;
		1409	$cb->(0, $hdr);
		1410
		1411	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1412	# retry later
		1413	$cb->(0, $hdr);
		1414
		1415	} else {
		1416	$cb->(undef, $hdr);
		1417	}
		1418	}
		1419	;
		1420	}
		1421
		1422	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1423	if ($_[0]) {
		1424	print "OK!\n";
		1425	} elsif (defined $_[0]) {
		1426	print "please retry later\n";
		1427	} else {
		1428	print "ERROR\n";
		1429	}
		1430	};
		1431
909	=head2 SOCKS PROXIES	1432	=head3 SOCKS PROXIES
910		1433
911	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1434	Socks proxies are not directly supported by AnyEvent::HTTP. You can
912	compile your perl to support socks, or use an external program such as	1435	compile your perl to support socks, or use an external program such as
913	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy	1436	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
914	transparently.	1437	transparently.

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines