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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.34 by root, Wed Oct 29 14:51:07 2008 UTC vs.
Revision 1.138 by root, Fri Aug 5 20:45:09 2022 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 Carp;	43	use Errno ();
45		44
46	use AnyEvent ();	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 = '1.05';	51	our $VERSION = 2.25;
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 $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$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;
59	our $MAX_PERSISTENT = 8;
60	our $PERSISTENT_TIMEOUT = 2;	57	our $PERSISTENT_TIMEOUT = 3;
61	our $TIMEOUT = 300;	58	our $TIMEOUT = 300;
62		59	our $MAX_PER_HOST = 4; # changing this is evil
63	# changing these is evil
64	our $MAX_PERSISTENT_PER_HOST = 2;
65	our $MAX_PER_HOST = 4;
66		60
67	our $PROXY;	61	our $PROXY;
68	our $ACTIVE = 0;	62	our $ACTIVE = 0;
69		63
70	my %KA_COUNT; # number of open keep-alive connections per host	64	my %KA_CACHE; # indexed by uhost currently, points to [$handle...] array
71	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
72		66
73	=item http_get $url, key => value..., $cb->($data, $headers)	67	=item http_get $url, key => value..., $cb->($data, $headers)
74		68
75	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
…		…
92	must be an absolute http or https URL.	86	must be an absolute http or https URL.
93		87
94	When called in void context, nothing is returned. In other contexts,	88	When called in void context, nothing is returned. In other contexts,
95	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
96	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
97	destroyed before the callbakc is called, the request will be cancelled.	91	destroyed before the callback is called, the request will be cancelled.
98		92
99	The callback will be called with the response data as first argument	93	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	94	(or C<undef> if an error occurred), and a hash-ref with response headers
101	response headers as second argument.	95	(and trailers) as second argument.
102		96
103	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
104	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>	98	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
		99	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	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>.
		104
106	pseudo-header C<URL> contains the original URL (which can differ from the	105	The pseudo-header C<URL> contains the actual URL (which can differ from
107	requested URL when following redirects).	106	the requested URL when following redirects - for example, you might get
		107	an error that your URL scheme is not supported even though your URL is a
		108	valid http URL because it redirected to an ftp URL, in which case you can
		109	look at the URL pseudo header).
		110
		111	The pseudo-header C<Redirect> only exists when the request was a result
		112	of an internal redirect. In that case it is an array reference with
		113	the C<($data, $headers)> from the redirect response. Note that this
		114	response could in turn be the result of a redirect itself, and C<<
		115	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		116	response, and so on.
108		117
109	If the server sends a header multiple times, then their contents will be	118	If the server sends a header multiple times, then their contents will be
110	joined together with a comma (C<,>), as per the HTTP spec.	119	joined together with a comma (C<,>), as per the HTTP spec.
111		120
112	If an internal error occurs, such as not being able to resolve a hostname,	121	If an internal error occurs, such as not being able to resolve a hostname,
113	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	122	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be
114	and the C<Reason> pseudo-header will contain an error message.	123	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
		124	message. Currently the following status codes are used:
		125
		126	=over 4
		127
		128	=item 595 - errors during connection establishment, proxy handshake.
		129
		130	=item 596 - errors during TLS negotiation, request sending and header processing.
		131
		132	=item 597 - errors during body receiving or processing.
		133
		134	=item 598 - user aborted request via C<on_header> or C<on_body>.
		135
		136	=item 599 - other, usually nonretryable, errors (garbled URL etc.).
		137
		138	=back
115		139
116	A typical callback might look like this:	140	A typical callback might look like this:
117		141
118	sub {	142	sub {
119	my ($body, $hdr) = @_;	143	my ($body, $hdr) = @_;
…		…
130		154
131	=over 4	155	=over 4
132		156
133	=item recurse => $count (default: $MAX_RECURSE)	157	=item recurse => $count (default: $MAX_RECURSE)
134		158
135	Whether to recurse requests or not, e.g. on redirects, authentication	159	Whether to recurse requests or not, e.g. on redirects, authentication and
136	retries and so on, and how often to do so.	160	other retries and so on, and how often to do so.
		161
		162	Only redirects to http and https URLs are supported. While most common
		163	redirection forms are handled entirely within this module, some require
		164	the use of the optional L<URI> module. If it is required but missing, then
		165	the request will fail with an error.
137		166
138	=item headers => hashref	167	=item headers => hashref
139		168
140	The request headers to use. Currently, C<http_request> may provide its	169	The request headers to use. Currently, C<http_request> may provide its own
141	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers	170	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
142	and will provide defaults for C<User-Agent:> and C<Referer:>.	171	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>
		172	(this can be suppressed by using C<undef> for these headers in which case
		173	they won't be sent at all).
		174
		175	You really should provide your own C<User-Agent:> header value that is
		176	appropriate for your program - I wouldn't be surprised if the default
		177	AnyEvent string gets blocked by webservers sooner or later.
		178
		179	Also, make sure that your headers names and values do not contain any
		180	embedded newlines.
143		181
144	=item timeout => $seconds	182	=item timeout => $seconds
145		183
146	The time-out to use for various stages - each connect attempt will reset	184	The time-out to use for various stages - each connect attempt will reset
147	the timeout, as will read or write activity. Default timeout is 5 minutes.	185	the timeout, as will read or write activity, i.e. this is not an overall
		186	timeout.
		187
		188	Default timeout is 5 minutes.
148		189
149	=item proxy => [$host, $port[, $scheme]] or undef	190	=item proxy => [$host, $port[, $scheme]] or undef
150		191
151	Use the given http proxy for all requests. If not specified, then the	192	Use the given http proxy for all requests, or no proxy if C<undef> is
152	default proxy (as specified by C<$ENV{http_proxy}>) is used.	193	used.
153		194
154	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	195	C<$scheme> must be either missing or must be C<http> for HTTP.
155	HTTPS.	196
		197	If not specified, then the default proxy is used (see
		198	C<AnyEvent::HTTP::set_proxy>).
		199
		200	Currently, if your proxy requires authorization, you have to specify an
		201	appropriate "Proxy-Authorization" header in every request.
		202
		203	Note that this module will prefer an existing persistent connection,
		204	even if that connection was made using another proxy. If you need to
		205	ensure that a new connection is made in this case, you can either force
		206	C<persistent> to false or e.g. use the proxy address in your C<sessionid>.
156		207
157	=item body => $string	208	=item body => $string
158		209
159	The request body, usually empty. Will be-sent as-is (future versions of	210	The request body, usually empty. Will be sent as-is (future versions of
160	this module might offer more options).	211	this module might offer more options).
161		212
162	=item cookie_jar => $hash_ref	213	=item cookie_jar => $hash_ref
163		214
164	Passing this parameter enables (simplified) cookie-processing, loosely	215	Passing this parameter enables (simplified) cookie-processing, loosely
165	based on the original netscape specification.	216	based on the original netscape specification.
166		217
167	The C<$hash_ref> must be an (initially empty) hash reference which will	218	The C<$hash_ref> must be an (initially empty) hash reference which
168	get updated automatically. It is possible to save the cookie_jar to	219	will get updated automatically. It is possible to save the cookie jar
169	persistent storage with something like JSON or Storable, but this is not	220	to persistent storage with something like JSON or Storable - see the
170	recommended, as expire times are currently being ignored.	221	C<AnyEvent::HTTP::cookie_jar_expire> function if you wish to remove
		222	expired or session-only cookies, and also for documentation on the format
		223	of the cookie jar.
171		224
172	Note that this cookie implementation is not of very high quality, nor	225	Note that this cookie implementation is not meant to be complete. If
173	meant to be complete. If you want complete cookie management you have to	226	you want complete cookie management you have to do that on your
174	do that on your own. C<cookie_jar> is meant as a quick fix to get some	227	own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites
175	cookie-using sites working. Cookies are a privacy disaster, do not use	228	working. Cookies are a privacy disaster, do not use them unless required
176	them unless required to.	229	to.
		230
		231	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
		232	headers will be set and handled by this module, otherwise they will be
		233	left untouched.
		234
		235	=item tls_ctx => $scheme \| $tls_ctx
		236
		237	Specifies the AnyEvent::TLS context to be used for https connections. This
		238	parameter follows the same rules as the C<tls_ctx> parameter to
		239	L<AnyEvent::Handle>, but additionally, the two strings C<low> or
		240	C<high> can be specified, which give you a predefined low-security (no
		241	verification, highest compatibility) and high-security (CA and common-name
		242	verification) TLS context.
		243
		244	The default for this option is C<low>, which could be interpreted as "give
		245	me the page, no matter what".
		246
		247	See also the C<sessionid> parameter.
		248
		249	=item sessionid => $string
		250
		251	The module might reuse connections to the same host internally (regardless
		252	of other settings, such as C<tcp_connect> or C<proxy>). Sometimes (e.g.
		253	when using TLS or a specfic proxy), you do not want to reuse connections
		254	from other sessions. This can be achieved by setting this parameter to
		255	some unique ID (such as the address of an object storing your state data
		256	or the TLS context, or the proxy IP) - only connections using the same
		257	unique ID will be reused.
		258
		259	=item on_prepare => $callback->($fh)
		260
		261	In rare cases you need to "tune" the socket before it is used to
		262	connect (for example, to bind it on a given IP address). This parameter
		263	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		264	and behaves exactly the same way (e.g. it has to provide a
		265	timeout). See the description for the C<$prepare_cb> argument of
		266	C<AnyEvent::Socket::tcp_connect> for details.
		267
		268	=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
		269
		270	In even rarer cases you want total control over how AnyEvent::HTTP
		271	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
		272	to do this, but you can provide your own C<tcp_connect> function -
		273	obviously, it has to follow the same calling conventions, except that it
		274	may always return a connection guard object.
		275
		276	The connections made by this hook will be treated as equivalent to
		277	connections made the built-in way, specifically, they will be put into
		278	and taken from the persistent connection cache. If your C<$tcp_connect>
		279	function is incompatible with this kind of re-use, consider switching off
		280	C<persistent> connections and/or providing a C<sessionid> identifier.
		281
		282	There are probably lots of weird uses for this function, starting from
		283	tracing the hosts C<http_request> actually tries to connect, to (inexact
		284	but fast) host => IP address caching or even socks protocol support.
		285
		286	=item on_header => $callback->($headers)
		287
		288	When specified, this callback will be called with the header hash as soon
		289	as headers have been successfully received from the remote server (not on
		290	locally-generated errors).
		291
		292	It has to return either true (in which case AnyEvent::HTTP will continue),
		293	or false, in which case AnyEvent::HTTP will cancel the download (and call
		294	the finish callback with an error code of C<598>).
		295
		296	This callback is useful, among other things, to quickly reject unwanted
		297	content, which, if it is supposed to be rare, can be faster than first
		298	doing a C<HEAD> request.
		299
		300	The downside is that cancelling the request makes it impossible to re-use
		301	the connection. Also, the C<on_header> callback will not receive any
		302	trailer (headers sent after the response body).
		303
		304	Example: cancel the request unless the content-type is "text/html".
		305
		306	on_header => sub {
		307	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		308	},
		309
		310	=item on_body => $callback->($partial_body, $headers)
		311
		312	When specified, all body data will be passed to this callback instead of
		313	to the completion callback. The completion callback will get the empty
		314	string instead of the body data.
		315
		316	It has to return either true (in which case AnyEvent::HTTP will continue),
		317	or false, in which case AnyEvent::HTTP will cancel the download (and call
		318	the completion callback with an error code of C<598>).
		319
		320	The downside to cancelling the request is that it makes it impossible to
		321	re-use the connection.
		322
		323	This callback is useful when the data is too large to be held in memory
		324	(so the callback writes it to a file) or when only some information should
		325	be extracted, or when the body should be processed incrementally.
		326
		327	It is usually preferred over doing your own body handling via
		328	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		329	only used to create a connection, C<want_body_handle> is the better
		330	alternative, as it allows you to install your own event handler, reducing
		331	resource usage.
		332
		333	=item want_body_handle => $enable
		334
		335	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		336	changes considerably: after parsing the headers, and instead of
		337	downloading the body (if any), the completion callback will be
		338	called. Instead of the C<$body> argument containing the body data, the
		339	callback will receive the L<AnyEvent::Handle> object associated with the
		340	connection. In error cases, C<undef> will be passed. When there is no body
		341	(e.g. status C<304>), the empty string will be passed.
		342
		343	The handle object might or might not be in TLS mode, might be connected
		344	to a proxy, be a persistent connection, use chunked transfer encoding
		345	etc., and configured in unspecified ways. The user is responsible for this
		346	handle (it will not be used by this module anymore).
		347
		348	This is useful with some push-type services, where, after the initial
		349	headers, an interactive protocol is used (typical example would be the
		350	push-style twitter API which starts a JSON/XML stream).
		351
		352	If you think you need this, first have a look at C<on_body>, to see if
		353	that doesn't solve your problem in a better way.
		354
		355	=item persistent => $boolean
		356
		357	Try to create/reuse a persistent connection. When this flag is set
		358	(default: true for idempotent requests, false for all others), then
		359	C<http_request> tries to re-use an existing (previously-created)
		360	persistent connection to same host (i.e. identical URL scheme, hostname,
		361	port and sessionid) and, failing that, tries to create a new one.
		362
		363	Requests failing in certain ways will be automatically retried once, which
		364	is dangerous for non-idempotent requests, which is why it defaults to off
		365	for them. The reason for this is because the bozos who designed HTTP/1.1
		366	made it impossible to distinguish between a fatal error and a normal
		367	connection timeout, so you never know whether there was a problem with
		368	your request or not.
		369
		370	When reusing an existent connection, many parameters (such as TLS context)
		371	will be ignored. See the C<sessionid> parameter for a workaround.
		372
		373	=item keepalive => $boolean
		374
		375	Only used when C<persistent> is also true. This parameter decides whether
		376	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		377	(as opposed to only a HTTP/1.1 persistent connection).
		378
		379	The default is true, except when using a proxy, in which case it defaults
		380	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		381
		382	=item handle_params => { key => value ... }
		383
		384	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		385	constructor that is called - not all requests will create a handle, and
		386	sometimes more than one is created, so this parameter is only good for
		387	setting hints.
		388
		389	Example: set the maximum read size to 4096, to potentially conserve memory
		390	at the cost of speed.
		391
		392	handle_params => {
		393	max_read_size => 4096,
		394	},
177		395
178	=back	396	=back
179		397
180	Example: make a simple HTTP GET request for http://www.nethype.de/	398	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		399	the response body.
181		400
182	http_request GET => "http://www.nethype.de/", sub {	401	http_request GET => "http://www.nethype.de/", sub {
183	my ($body, $hdr) = @_;	402	my ($body, $hdr) = @_;
184	print "$body\n";	403	print "$body\n";
185	};	404	};
186		405
187	Example: make a HTTP HEAD request on https://www.google.com/, use a	406	Example: do a HTTP HEAD request on https://www.google.com/, use a
188	timeout of 30 seconds.	407	timeout of 30 seconds.
189		408
190	http_request	409	http_request
191	GET => "https://www.google.com",	410	HEAD => "https://www.google.com",
		411	headers => { "user-agent" => "MySearchClient 1.0" },
192	timeout => 30,	412	timeout => 30,
193	sub {	413	sub {
194	my ($body, $hdr) = @_;	414	my ($body, $hdr) = @_;
195	use Data::Dumper;	415	use Data::Dumper;
196	print Dumper $hdr;	416	print Dumper $hdr;
197	}	417	}
198	;	418	;
199		419
200	Example: make another simple HTTP GET request, but immediately try to	420	Example: do another simple HTTP GET request, but immediately try to
201	cancel it.	421	cancel it.
202		422
203	my $request = http_request GET => "http://www.nethype.de/", sub {	423	my $request = http_request GET => "http://www.nethype.de/", sub {
204	my ($body, $hdr) = @_;	424	my ($body, $hdr) = @_;
205	print "$body\n";	425	print "$body\n";
206	};	426	};
207		427
208	undef $request;	428	undef $request;
209		429
210	=cut	430	=cut
		431
		432	#############################################################################
		433	# wait queue/slots
211		434
212	sub _slot_schedule;	435	sub _slot_schedule;
213	sub _slot_schedule($) {	436	sub _slot_schedule($) {
214	my $host = shift;	437	my $host = shift;
215		438
…		…
237	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	460	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
238		461
239	_slot_schedule $_[0];	462	_slot_schedule $_[0];
240	}	463	}
241		464
242	our $qr_nl = qr<\015?\012>;	465	#############################################################################
243	our $qr_nlnl = qr<\015?\012\015?\012>;	466	# cookie handling
		467
		468	# expire cookies
		469	sub cookie_jar_expire($;$) {
		470	my ($jar, $session_end) = @_;
		471
		472	%$jar = () if $jar->{version} != 2;
		473
		474	my $anow = AE::now;
		475
		476	while (my ($chost, $paths) = each %$jar) {
		477	next unless ref $paths;
		478
		479	while (my ($cpath, $cookies) = each %$paths) {
		480	while (my ($cookie, $kv) = each %$cookies) {
		481	if (exists $kv->{_expires}) {
		482	delete $cookies->{$cookie}
		483	if $anow > $kv->{_expires};
		484	} elsif ($session_end) {
		485	delete $cookies->{$cookie};
		486	}
		487	}
		488
		489	delete $paths->{$cpath}
		490	unless %$cookies;
		491	}
		492
		493	delete $jar->{$chost}
		494	unless %$paths;
		495	}
		496	}
		497
		498	# extract cookies from jar
		499	sub cookie_jar_extract($$$$) {
		500	my ($jar, $scheme, $host, $path) = @_;
		501
		502	%$jar = () if $jar->{version} != 2;
		503
		504	$host = AnyEvent::Util::idn_to_ascii $host
		505	if $host =~ /[^\x00-\x7f]/;
		506
		507	my @cookies;
		508
		509	while (my ($chost, $paths) = each %$jar) {
		510	next unless ref $paths;
		511
		512	# exact match or suffix including . match
		513	$chost eq $host or ".$chost" eq substr $host, -1 - length $chost
		514	or next;
		515
		516	while (my ($cpath, $cookies) = each %$paths) {
		517	next unless $cpath eq substr $path, 0, length $cpath;
		518
		519	while (my ($cookie, $kv) = each %$cookies) {
		520	next if $scheme ne "https" && exists $kv->{secure};
		521
		522	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
		523	delete $cookies->{$cookie};
		524	next;
		525	}
		526
		527	my $value = $kv->{value};
		528
		529	if ($value =~ /[=;,[:space:]]/) {
		530	$value =~ s/([\\"])/\\$1/g;
		531	$value = "\"$value\"";
		532	}
		533
		534	push @cookies, "$cookie=$value";
		535	}
		536	}
		537	}
		538
		539	\@cookies
		540	}
		541
		542	# parse set_cookie header into jar
		543	sub cookie_jar_set_cookie($$$$) {
		544	my ($jar, $set_cookie, $host, $date) = @_;
		545
		546	%$jar = () if $jar->{version} != 2;
		547
		548	my $anow = int AE::now;
		549	my $snow; # server-now
		550
		551	for ($set_cookie) {
		552	# parse NAME=VALUE
		553	my @kv;
		554
		555	# expires is not http-compliant in the original cookie-spec,
		556	# we support the official date format and some extensions
		557	while (
		558	m{
		559	\G\s*
		560	(?:
		561	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
		562	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^;,[:space:]]) ) )?
		563	)
		564	}gcxsi
		565	) {
		566	my $name = $2;
		567	my $value = $4;
		568
		569	if (defined $1) {
		570	# expires
		571	$name = "expires";
		572	$value = $1;
		573	} elsif (defined $3) {
		574	# quoted
		575	$value = $3;
		576	$value =~ s/\\(.)/$1/gs;
		577	}
		578
		579	push @kv, @kv ? lc $name : $name, $value;
		580
		581	last unless /\G\s*;/gc;
		582	}
		583
		584	last unless @kv;
		585
		586	my $name = shift @kv;
		587	my %kv = (value => shift @kv, @kv);
		588
		589	if (exists $kv{"max-age"}) {
		590	$kv{_expires} = $anow + delete $kv{"max-age"};
		591	} elsif (exists $kv{expires}) {
		592	$snow \|\|= parse_date ($date) \|\| $anow;
		593	$kv{_expires} = $anow + (parse_date (delete $kv{expires}) - $snow);
		594	} else {
		595	delete $kv{_expires};
		596	}
		597
		598	my $cdom;
		599	my $cpath = (delete $kv{path}) \|\| "/";
		600
		601	if (exists $kv{domain}) {
		602	$cdom = $kv{domain};
		603
		604	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		605
		606	next if $cdom =~ /\.$/;
		607
		608	# this is not rfc-like and not netscape-like. go figure.
		609	my $ndots = $cdom =~ y/.//;
		610	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		611
		612	$cdom = substr $cdom, 1; # remove initial .
		613	} else {
		614	$cdom = $host;
		615	}
		616
		617	# store it
		618	$jar->{version} = 2;
		619	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
		620
		621	redo if /\G\s*,/gc;
		622	}
		623	}
		624
		625	#############################################################################
		626	# keepalive/persistent connection cache
		627
		628	# fetch a connection from the keepalive cache
		629	sub ka_fetch($) {
		630	my $ka_key = shift;
		631
		632	my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection
		633	delete $KA_CACHE{$ka_key}
		634	unless @{ $KA_CACHE{$ka_key} };
		635
		636	$hdl
		637	}
		638
		639	sub ka_store($$) {
		640	my ($ka_key, $hdl) = @_;
		641
		642	my $kaa = $KA_CACHE{$ka_key} \|\|= [];
		643
		644	my $destroy = sub {
		645	my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} };
		646
		647	$hdl->destroy;
		648
		649	@ka
		650	? $KA_CACHE{$ka_key} = \@ka
		651	: delete $KA_CACHE{$ka_key};
		652	};
		653
		654	# on error etc., destroy
		655	$hdl->on_error ($destroy);
		656	$hdl->on_eof ($destroy);
		657	$hdl->on_read ($destroy);
		658	$hdl->timeout ($PERSISTENT_TIMEOUT);
		659
		660	push @$kaa, $hdl;
		661	shift @$kaa while @$kaa > $MAX_PER_HOST;
		662	}
		663
		664	#############################################################################
		665	# utilities
		666
		667	# continue to parse $_ for headers and place them into the arg
		668	sub _parse_hdr() {
		669	my %hdr;
		670
		671	# things seen, not parsed:
		672	# p3pP="NON CUR OTPi OUR NOR UNI"
		673
		674	$hdr{lc $1} .= ",$2"
		675	while /\G
		676	([^:\000-\037]*):
		677	[\011\040]*
		678	((?: [^\012]+ \| \012[\011\040] )*)
		679	\012
		680	/gxc;
		681
		682	/\G$/
		683	or return;
		684
		685	# remove the "," prefix we added to all headers above
		686	substr $_, 0, 1, ""
		687	for values %hdr;
		688
		689	\%hdr
		690	}
		691
		692	#############################################################################
		693	# http_get
		694
		695	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		696
		697	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		698	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		699
		700	# maybe it should just become a normal object :/
		701
		702	sub _destroy_state(\%) {
		703	my ($state) = @_;
		704
		705	$state->{handle}->destroy if $state->{handle};
		706	%$state = ();
		707	}
		708
		709	sub _error(\%$$) {
		710	my ($state, $cb, $hdr) = @_;
		711
		712	&_destroy_state ($state);
		713
		714	$cb->(undef, $hdr);
		715	()
		716	}
		717
		718	our %IDEMPOTENT = (
		719	DELETE => 1,
		720	GET => 1,
		721	QUERY => 1,
		722	HEAD => 1,
		723	OPTIONS => 1,
		724	PUT => 1,
		725	TRACE => 1,
		726
		727	ACL => 1,
		728	"BASELINE-CONTROL" => 1,
		729	BIND => 1,
		730	CHECKIN => 1,
		731	CHECKOUT => 1,
		732	COPY => 1,
		733	LABEL => 1,
		734	LINK => 1,
		735	MERGE => 1,
		736	MKACTIVITY => 1,
		737	MKCALENDAR => 1,
		738	MKCOL => 1,
		739	MKREDIRECTREF => 1,
		740	MKWORKSPACE => 1,
		741	MOVE => 1,
		742	ORDERPATCH => 1,
		743	PROPFIND => 1,
		744	PROPPATCH => 1,
		745	REBIND => 1,
		746	REPORT => 1,
		747	SEARCH => 1,
		748	UNBIND => 1,
		749	UNCHECKOUT => 1,
		750	UNLINK => 1,
		751	UNLOCK => 1,
		752	UPDATE => 1,
		753	UPDATEREDIRECTREF => 1,
		754	"VERSION-CONTROL" => 1,
		755	);
244		756
245	sub http_request($$@) {	757	sub http_request($$@) {
246	my $cb = pop;	758	my $cb = pop;
247	my ($method, $url, %arg) = @_;	759	my ($method, $url, %arg) = @_;
248		760
249	my %hdr;	761	my %hdr;
		762
		763	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		764	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
250		765
251	$method = uc $method;	766	$method = uc $method;
252		767
253	if (my $hdr = $arg{headers}) {	768	if (my $hdr = $arg{headers}) {
254	while (my ($k, $v) = each %$hdr) {	769	while (my ($k, $v) = each %$hdr) {
255	$hdr{lc $k} = $v;	770	$hdr{lc $k} = $v;
256	}	771	}
257	}	772	}
258		773
		774	# pseudo headers for all subsequent responses
		775	my @pseudo = (URL => $url);
		776	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		777
259	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	778	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
260		779
261	return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url })	780	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
262	if $recurse < 0;	781	if $recurse < 0;
263		782
264	my $proxy = $arg{proxy} \|\| $PROXY;	783	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
265	my $timeout = $arg{timeout} \|\| $TIMEOUT;	784	my $timeout = $arg{timeout} \|\| $TIMEOUT;
266		785
267	$hdr{"user-agent"} \|\|= $USERAGENT;
268
269	my ($uscheme, $uauthority, $upath, $query, $fragment) =	786	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
270	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	787	$url =~ m\|^([^:]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
271		788
272	$uscheme = lc $uscheme;	789	$uscheme = lc $uscheme;
273		790
274	my $uport = $uscheme eq "http" ? 80	791	my $uport = $uscheme eq "http" ? 80
275	: $uscheme eq "https" ? 443	792	: $uscheme eq "https" ? 443
276	: return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url });	793	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
277		794
278	$hdr{referer} \|\|= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
279
280	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	795	$uauthority =~ /^(?: .*\@ )? ([^\@]+?) (?: : (\d+) )?$/x
281	or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url });	796	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
282		797
283	my $uhost = $1;	798	my $uhost = lc $1;
284	$uport = $2 if defined $2;	799	$uport = $2 if defined $2;
285		800
		801	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		802	unless exists $hdr{host};
		803
286	$uhost =~ s/^\[(.*)\]$/$1/;	804	$uhost =~ s/^\[(.*)\]$/$1/;
287	$upath .= "?$query" if length $query;	805	$upath .= $query if length $query;
288		806
289	$upath =~ s%^/?%/%;	807	$upath =~ s%^/?%/%;
290		808
291	# cookie processing	809	# cookie processing
292	if (my $jar = $arg{cookie_jar}) {	810	if (my $jar = $arg{cookie_jar}) {
293	%$jar = () if $jar->{version} != 1;	811	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
294		812
295	my @cookie;
296
297	while (my ($chost, $v) = each %$jar) {
298	if ($chost =~ /^\./) {
299	next unless $chost eq substr $uhost, -length $chost;
300	} elsif ($chost =~ /\./) {
301	next unless $chost eq $uhost;
302	} else {
303	next;
304	}
305
306	while (my ($cpath, $v) = each %$v) {
307	next unless $cpath eq substr $upath, 0, length $cpath;
308
309	while (my ($k, $v) = each %$v) {
310	next if $uscheme ne "https" && exists $v->{secure};
311	my $value = $v->{value};
312	$value =~ s/([\\"])/\\$1/g;
313	push @cookie, "$k=\"$value\"";
314	}
315	}
316	}
317
318	$hdr{cookie} = join "; ", @cookie	813	$hdr{cookie} = join "; ", @$cookies
319	if @cookie;	814	if @$cookies;
320	}	815	}
321		816
322	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path	817	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
323		818
324	if ($proxy) {	819	if ($proxy) {
325	($rhost, $rport, $rscheme, $rpath) = (@$proxy, $url);	820	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
		821
		822	$rscheme = "http" unless defined $rscheme;
326		823
327	# don't support https requests over https-proxy transport,	824	# don't support https requests over https-proxy transport,
328	# can't be done with tls as spec'ed.	825	# can't be done with tls as spec'ed, unless you double-encrypt.
329	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	826	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		827
		828	$rhost = lc $rhost;
		829	$rscheme = lc $rscheme;
330	} else {	830	} else {
331	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	831	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
332	}	832	}
333		833
334	$hdr{host} = $uhost;	834	# leave out fragment and query string, just a heuristic
		835	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		836	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
		837
335	$hdr{"content-length"} = length $arg{body};	838	$hdr{"content-length"} = length $arg{body}
		839	if length $arg{body} \|\| $method ne "GET";
		840
		841	my $idempotent = $IDEMPOTENT{$method};
		842
		843	# default value for keepalive is true iff the request is for an idempotent method
		844	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
		845	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
		846	my $was_persistent; # true if this is actually a recycled connection
		847
		848	# the key to use in the keepalive cache
		849	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		850
		851	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
		852	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
336		853
337	my %state = (connect_guard => 1);	854	my %state = (connect_guard => 1);
		855
		856	my $ae_error = 595; # connecting
		857
		858	# handle actual, non-tunneled, request
		859	my $handle_actual_request = sub {
		860	$ae_error = 596; # request phase
		861
		862	my $hdl = $state{handle};
		863
		864	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
		865
		866	# send request
		867	$hdl->push_write (
		868	"$method $rpath HTTP/1.1\015\012"
		869	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		870	. "\015\012"
		871	. $arg{body}
		872	);
		873
		874	# return if error occurred during push_write()
		875	return unless %state;
		876
		877	# reduce memory usage, save a kitten, also re-use it for the response headers.
		878	%hdr = ();
		879
		880	# status line and headers
		881	$state{read_response} = sub {
		882	return unless %state;
		883
		884	for ("$_[1]") {
		885	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		886
		887	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
		888	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
		889
		890	# 100 Continue handling
		891	# should not happen as we don't send expect: 100-continue,
		892	# but we handle it just in case.
		893	# since we send the request body regardless, if we get an error
		894	# we are out of-sync, which we currently do NOT handle correctly.
		895	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		896	if $2 eq 100;
		897
		898	push @pseudo,
		899	HTTPVersion => $1,
		900	Status => $2,
		901	Reason => $3,
		902	;
		903
		904	my $hdr = _parse_hdr
		905	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
		906
		907	%hdr = (%$hdr, @pseudo);
		908	}
		909
		910	# redirect handling
		911	# relative uri handling forced by microsoft and other shitheads.
		912	# we give our best and fall back to URI if available.
		913	if (exists $hdr{location}) {
		914	my $loc = $hdr{location};
		915
		916	if ($loc =~ m%^//%) { # //
		917	$loc = "$uscheme:$loc";
		918
		919	} elsif ($loc eq "") {
		920	$loc = $url;
		921
		922	} elsif ($loc !~ /^(?: $ \| [^:\/?\#]+ : )/x) { # anything "simple"
		923	$loc =~ s/^\.\/+//;
		924
		925	if ($loc !~ m%^[.?#]%) {
		926	my $prefix = "$uscheme://$uauthority";
		927
		928	unless ($loc =~ s/^\///) {
		929	$prefix .= $upath;
		930	$prefix =~ s/\/[^\/]*$//;
		931	}
		932
		933	$loc = "$prefix/$loc";
		934
		935	} elsif (eval { require URI }) { # uri
		936	$loc = URI->new_abs ($loc, $url)->as_string;
		937
		938	} else {
		939	return _error %state, $cb, { @pseudo, Status => 599, Reason => "Cannot parse Location (URI module missing)" };
		940	#$hdr{Status} = 599;
		941	#$hdr{Reason} = "Unparsable Redirect (URI module missing)";
		942	#$recurse = 0;
		943	}
		944	}
		945
		946	$hdr{location} = $loc;
		947	}
		948
		949	my $redirect;
		950
		951	if ($recurse) {
		952	my $status = $hdr{Status};
		953
		954	# industry standard is to redirect POST as GET for
		955	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		956	# also, the UA should ask the user for 301 and 307 and POST,
		957	# industry standard seems to be to simply follow.
		958	# we go with the industry standard. 308 is defined
		959	# by rfc7538
		960	if ($status == 301 or $status == 302 or $status == 303) {
		961	$redirect = 1;
		962	# HTTP/1.1 is unclear on how to mutate the method
		963	unless ($method eq "HEAD") {
		964	$method = "GET";
		965	delete $arg{body};
		966	}
		967	} elsif ($status == 307 or $status == 308) {
		968	$redirect = 1;
		969	}
		970	}
		971
		972	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
		973	if ($state{handle}) {
		974	# handle keepalive
		975	if (
		976	$persistent
		977	&& $_[3]
		978	&& ($hdr{HTTPVersion} < 1.1
		979	? $hdr{connection} =~ /\bkeep-?alive\b/i
		980	: $hdr{connection} !~ /\bclose\b/i)
		981	) {
		982	ka_store $ka_key, delete $state{handle};
		983	} else {
		984	# no keepalive, destroy the handle
		985	$state{handle}->destroy;
		986	}
		987	}
		988
		989	%state = ();
		990
		991	if (defined $_[1]) {
		992	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		993	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		994	}
		995
		996	# set-cookie processing
		997	if ($arg{cookie_jar}) {
		998	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		999	}
		1000
		1001	if ($redirect && exists $hdr{location}) {
		1002	# we ignore any errors, as it is very common to receive
		1003	# Content-Length != 0 but no actual body
		1004	# we also access %hdr, as $_[1] might be an erro
		1005	$state{recurse} =
		1006	http_request (
		1007	$method => $hdr{location},
		1008	%arg,
		1009	recurse => $recurse - 1,
		1010	Redirect => [$_[0], \%hdr],
		1011	sub {
		1012	%state = ();
		1013	&$cb
		1014	},
		1015	);
		1016	} else {
		1017	$cb->($_[0], \%hdr);
		1018	}
		1019	};
		1020
		1021	$ae_error = 597; # body phase
		1022
		1023	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		1024
		1025	my $len = $chunked ? undef : $hdr{"content-length"};
		1026
		1027	# body handling, many different code paths
		1028	# - no body expected
		1029	# - want_body_handle
		1030	# - te chunked
		1031	# - 2x length known (with or without on_body)
		1032	# - 2x length not known (with or without on_body)
		1033	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		1034	$finish->(undef, 598 => "Request cancelled by on_header");
		1035	} elsif (
		1036	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		1037	or $method eq "HEAD"
		1038	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		1039	) {
		1040	# no body
		1041	$finish->("", undef, undef, 1);
		1042
		1043	} elsif (!$redirect && $arg{want_body_handle}) {
		1044	$_[0]->on_eof (undef);
		1045	$_[0]->on_error (undef);
		1046	$_[0]->on_read (undef);
		1047
		1048	$finish->(delete $state{handle});
		1049
		1050	} elsif ($chunked) {
		1051	my $cl = 0;
		1052	my $body = "";
		1053	my $on_body = (!$redirect && $arg{on_body}) \|\| sub { $body .= shift; 1 };
		1054
		1055	$state{read_chunk} = sub {
		1056	$_[1] =~ /^([0-9a-fA-F]+)/
		1057	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1058
		1059	my $len = hex $1;
		1060
		1061	if ($len) {
		1062	$cl += $len;
		1063
		1064	$_[0]->push_read (chunk => $len, sub {
		1065	$on_body->($_[1], \%hdr)
		1066	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1067
		1068	$_[0]->push_read (line => sub {
		1069	length $_[1]
		1070	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1071	$_[0]->push_read (line => $state{read_chunk});
		1072	});
		1073	});
		1074	} else {
		1075	$hdr{"content-length"} \|\|= $cl;
		1076
		1077	$_[0]->push_read (line => $qr_nlnl, sub {
		1078	if (length $_[1]) {
		1079	for ("$_[1]") {
		1080	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		1081
		1082	my $hdr = _parse_hdr
		1083	or return $finish->(undef, $ae_error => "Garbled response trailers");
		1084
		1085	%hdr = (%hdr, %$hdr);
		1086	}
		1087	}
		1088
		1089	$finish->($body, undef, undef, 1);
		1090	});
		1091	}
		1092	};
		1093
		1094	$_[0]->push_read (line => $state{read_chunk});
		1095
		1096	} elsif (!$redirect && $arg{on_body}) {
		1097	if (defined $len) {
		1098	$_[0]->on_read (sub {
		1099	$len -= length $_[0]{rbuf};
		1100
		1101	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1102	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1103
		1104	$len > 0
		1105	or $finish->("", undef, undef, 1);
		1106	});
		1107	} else {
		1108	$_[0]->on_eof (sub {
		1109	$finish->("");
		1110	});
		1111	$_[0]->on_read (sub {
		1112	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1113	or $finish->(undef, 598 => "Request cancelled by on_body");
		1114	});
		1115	}
		1116	} else {
		1117	$_[0]->on_eof (undef);
		1118
		1119	if (defined $len) {
		1120	$_[0]->on_read (sub {
		1121	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1122	if $len <= length $_[0]{rbuf};
		1123	});
		1124	} else {
		1125	$_[0]->on_error (sub {
		1126	($! == Errno::EPIPE \|\| !$!)
		1127	? $finish->(delete $_[0]{rbuf})
		1128	: $finish->(undef, $ae_error => $_[2]);
		1129	});
		1130	$_[0]->on_read (sub { });
		1131	}
		1132	}
		1133	};
		1134
		1135	# if keepalive is enabled, then the server closing the connection
		1136	# before a response can happen legally - we retry on idempotent methods.
		1137	if ($was_persistent && $idempotent) {
		1138	my $old_eof = $hdl->{on_eof};
		1139	$hdl->{on_eof} = sub {
		1140	_destroy_state %state;
		1141
		1142	%state = ();
		1143	$state{recurse} =
		1144	http_request (
		1145	$method => $url,
		1146	%arg,
		1147	recurse => $recurse - 1,
		1148	persistent => 0,
		1149	sub {
		1150	%state = ();
		1151	&$cb
		1152	}
		1153	);
		1154	};
		1155	$hdl->on_read (sub {
		1156	return unless %state;
		1157
		1158	# as soon as we receive something, a connection close
		1159	# once more becomes a hard error
		1160	$hdl->{on_eof} = $old_eof;
		1161	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1162	});
		1163	} else {
		1164	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1165	}
		1166	};
		1167
		1168	my $prepare_handle = sub {
		1169	my ($hdl) = $state{handle};
		1170
		1171	$hdl->on_error (sub {
		1172	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1173	});
		1174	$hdl->on_eof (sub {
		1175	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1176	});
		1177	$hdl->timeout_reset;
		1178	$hdl->timeout ($timeout);
		1179	};
		1180
		1181	# connected to proxy (or origin server)
		1182	my $connect_cb = sub {
		1183	my $fh = shift
		1184	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1185
		1186	return unless delete $state{connect_guard};
		1187
		1188	# get handle
		1189	$state{handle} = new AnyEvent::Handle
		1190	%{ $arg{handle_params} },
		1191	fh => $fh,
		1192	peername => $uhost,
		1193	tls_ctx => $arg{tls_ctx},
		1194	;
		1195
		1196	$prepare_handle->();
		1197
		1198	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1199
		1200	# now handle proxy-CONNECT method
		1201	if ($proxy && $uscheme eq "https") {
		1202	# oh dear, we have to wrap it into a connect request
		1203
		1204	my $auth = exists $hdr{"proxy-authorization"}
		1205	? "proxy-authorization: " . (delete $hdr{"proxy-authorization"}) . "\015\012"
		1206	: "";
		1207
		1208	# maybe re-use $uauthority with patched port?
		1209	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012$auth\015\012");
		1210	$state{handle}->push_read (line => $qr_nlnl, sub {
		1211	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1212	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1213
		1214	if ($2 == 200) {
		1215	$rpath = $upath;
		1216	$handle_actual_request->();
		1217	} else {
		1218	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1219	}
		1220	});
		1221	} else {
		1222	delete $hdr{"proxy-authorization"} unless $proxy;
		1223
		1224	$handle_actual_request->();
		1225	}
		1226	};
338		1227
339	_get_slot $uhost, sub {	1228	_get_slot $uhost, sub {
340	$state{slot_guard} = shift;	1229	$state{slot_guard} = shift;
341		1230
342	return unless $state{connect_guard};	1231	return unless $state{connect_guard};
343		1232
344	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	1233	# try to use an existing keepalive connection, but only if we, ourselves, plan
345	$state{fh} = shift	1234	# on a keepalive request (in theory, this should be a separate config option).
346	or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url });	1235	if ($persistent && $KA_CACHE{$ka_key}) {
347	pop; # free memory, save a tree	1236	$was_persistent = 1;
348		1237
349	return unless delete $state{connect_guard};	1238	$state{handle} = ka_fetch $ka_key;
		1239	# $state{handle}->destroyed
		1240	# and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
		1241	$prepare_handle->();
		1242	# $state{handle}->destroyed
		1243	# and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
		1244	$rpath = $upath;
		1245	$handle_actual_request->();
350		1246
351	# get handle
352	$state{handle} = new AnyEvent::Handle
353	fh => $state{fh},
354	timeout => $timeout;
355
356	# limit the number of persistent connections
357	# keepalive not yet supported
358	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
359	++$KA_COUNT{$_[1]};
360	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {
361	--$KA_COUNT{$_[1]}
362	};
363	$hdr{connection} = "keep-alive";
364	} else {	1247	} else {
365	delete $hdr{connection};	1248	my $tcp_connect = $arg{tcp_connect}
366	}	1249	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
367		1250
368	# (re-)configure handle	1251	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
369	$state{handle}->on_error (sub {
370	my $errno = "$!";
371	%state = ();
372	$cb->(undef, { Status => 599, Reason => $errno, URL => $url });
373	});
374	$state{handle}->on_eof (sub {
375	%state = ();
376	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url });
377	});
378
379	$state{handle}->starttls ("connect") if $rscheme eq "https";
380
381	# handle actual, non-tunneled, request
382	my $handle_actual_request = sub {
383	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
384
385	# send request
386	$state{handle}->push_write (
387	"$method $rpath HTTP/1.0\015\012"
388	. (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
389	. "\015\012"
390	. (delete $arg{body})
391	);
392
393	%hdr = (); # reduce memory usage, save a kitten
394
395	# status line
396	$state{handle}->push_read (line => $qr_nl, sub {
397	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
398	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
399
400	my %hdr = ( # response headers
401	HTTPVersion => ",$1",
402	Status => ",$2",
403	Reason => ",$3",
404	URL => ",$url"
405	);
406
407	# headers, could be optimized a bit
408	$state{handle}->unshift_read (line => $qr_nlnl, sub {
409	for ("$_[1]\012") {
410	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
411
412	# we support spaces in field names, as lotus domino
413	# creates them (actually spaces around seperators
414	# are strictly allowed in http, they are a security issue).
415	$hdr{lc $1} .= ",$2"
416	while /\G
417	([^:\000-\037]+):
418	[\011\040]*
419	((?: [^\012]+ \| \012[\011\040] )*)
420	\012
421	/gxc;
422
423	/\G$/
424	or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url }));
425	}
426
427	substr $_, 0, 1, ""
428	for values %hdr;
429
430	my $finish = sub {
431	# TODO: use destroy method, when/if available
432	#$state{handle}->destroy;
433	$state{handle}->on_eof (undef);
434	$state{handle}->on_error (undef);
435	%state = ();
436
437	# set-cookie processing
438	if ($arg{cookie_jar}) {
439	for ($hdr{"set-cookie"}) {
440	# parse NAME=VALUE
441	my @kv;
442
443	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
444	my $name = $1;
445	my $value = $3;
446
447	unless ($value) {
448	$value = $2;
449	$value =~ s/\\(.)/$1/gs;
450	}
451
452	push @kv, $name => $value;
453
454	last unless /\G\s*;/gc;
455	}
456
457	last unless @kv;
458
459	my $name = shift @kv;
460	my %kv = (value => shift @kv, @kv);
461
462	my $cdom;
463	my $cpath = (delete $kv{path}) \|\| "/";
464
465	if (exists $kv{domain}) {
466	$cdom = delete $kv{domain};
467
468	$cdom =~ s/^\.?/./; # make sure it starts with a "."
469
470	next if $cdom =~ /\.$/;
471
472	# this is not rfc-like and not netscape-like. go figure.
473	my $ndots = $cdom =~ y/.//;
474	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
475	} else {
476	$cdom = $uhost;
477	}
478
479	# store it
480	$arg{cookie_jar}{version} = 1;
481	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
482
483	redo if /\G\s*,/gc;
484	}
485	}
486
487	# microsoft and other shitheads don't give a shit for following standards,
488	# try to support some common forms of broken Location headers.
489	if ($_[1]{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
490	$_[1]{location} =~ s/^\.\/+//;
491
492	my $url = "$rscheme://$uhost:$uport";
493
494	unless ($_[1]{location} =~ s/^\///) {
495	$url .= $upath;
496	$url =~ s/\/[^\/]*$//;
497	}
498
499	$_[1]{location} = "$url/$_[1]{location}";
500	}
501
502	if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
503	# apparently, mozilla et al. just change POST to GET here
504	# more research is needed before we do the same
505	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
506	} elsif ($_[1]{Status} == 303 && $recurse) {
507	# even http/1.1 is unclear on how to mutate the method
508	$method = "GET" unless $method eq "HEAD";
509	http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
510	} elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET\|HEAD)$/) {
511	http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
512	} else {
513	$cb->($_[0], $_[1]);
514	}
515	};
516
517	if ($hdr{Status} =~ /^(?:1..\|204\|304)$/ or $method eq "HEAD") {
518	$finish->(undef, \%hdr);
519	} else {
520	if (exists $hdr{"content-length"}) {
521	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
522	# could cache persistent connection now
523	if ($hdr{connection} =~ /\bkeep-alive\b/i) {
524	# but we don't, due to misdesigns, this is annoyingly complex
525	};
526
527	$finish->($_[1], \%hdr);
528	});
529	} else {
530	# too bad, need to read until we get an error or EOF,
531	# no way to detect winged data.
532	$_[0]->on_error (sub {
533	$finish->($_[0]{rbuf}, \%hdr);
534	});
535	$_[0]->on_eof (undef);
536	$_[0]->on_read (sub { });
537	}
538	}
539	});
540	});
541	};
542
543	# now handle proxy-CONNECT method
544	if ($proxy && $uscheme eq "https") {
545	# oh dear, we have to wrap it into a connect request
546
547	# maybe re-use $uauthority with patched port?
548	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
549	$state{handle}->push_read (line => $qr_nlnl, sub {
550	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
551	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid proxy connect response ($_[1])", URL => $url }));
552
553	if ($2 == 200) {
554	$rpath = $upath;
555	&$handle_actual_request;
556	} else {
557	%state = ();
558	$cb->(undef, { Status => $2, Reason => $3, URL => $url });
559	}
560	});
561	} else {
562	&$handle_actual_request;
563	}
564
565	}, sub {
566	$timeout
567	};	1252	}
568	};	1253	};
569		1254
570	defined wantarray && AnyEvent::Util::guard { %state = () }	1255	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
571	}	1256	}
572		1257
573	sub http_get($@) {	1258	sub http_get($@) {
574	unshift @_, "GET";	1259	unshift @_, "GET";
575	&http_request	1260	&http_request
…		…
586	&http_request	1271	&http_request
587	}	1272	}
588		1273
589	=back	1274	=back
590		1275
		1276	=head2 DNS CACHING
		1277
		1278	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		1279	the actual connection, which in turn uses AnyEvent::DNS to resolve
		1280	hostnames. The latter is a simple stub resolver and does no caching
		1281	on its own. If you want DNS caching, you currently have to provide
		1282	your own default resolver (by storing a suitable resolver object in
		1283	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
		1284
591	=head2 GLOBAL FUNCTIONS AND VARIABLES	1285	=head2 GLOBAL FUNCTIONS AND VARIABLES
592		1286
593	=over 4	1287	=over 4
594		1288
595	=item AnyEvent::HTTP::set_proxy "proxy-url"	1289	=item AnyEvent::HTTP::set_proxy "proxy-url"
596		1290
597	Sets the default proxy server to use. The proxy-url must begin with a	1291	Sets the default proxy server to use. The proxy-url must begin with a
598	string of the form C<http://host:port> (optionally C<https:...>).	1292	string of the form C<http://host:port>, croaks otherwise.
		1293
		1294	To clear an already-set proxy, use C<undef>.
		1295
		1296	When AnyEvent::HTTP is loaded for the first time it will query the
		1297	default proxy from the operating system, currently by looking at
		1298	C<$ENV{http_proxy>}.
		1299
		1300	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
		1301
		1302	Remove all cookies from the cookie jar that have been expired. If
		1303	C<$session_end> is given and true, then additionally remove all session
		1304	cookies.
		1305
		1306	You should call this function (with a true C<$session_end>) before you
		1307	save cookies to disk, and you should call this function after loading them
		1308	again. If you have a long-running program you can additionally call this
		1309	function from time to time.
		1310
		1311	A cookie jar is initially an empty hash-reference that is managed by this
		1312	module. Its format is subject to change, but currently it is as follows:
		1313
		1314	The key C<version> has to contain C<2>, otherwise the hash gets
		1315	cleared. All other keys are hostnames or IP addresses pointing to
		1316	hash-references. The key for these inner hash references is the
		1317	server path for which this cookie is meant, and the values are again
		1318	hash-references. Each key of those hash-references is a cookie name, and
		1319	the value, you guessed it, is another hash-reference, this time with the
		1320	key-value pairs from the cookie, except for C<expires> and C<max-age>,
		1321	which have been replaced by a C<_expires> key that contains the cookie
		1322	expiry timestamp. Session cookies are indicated by not having an
		1323	C<_expires> key.
		1324
		1325	Here is an example of a cookie jar with a single cookie, so you have a
		1326	chance of understanding the above paragraph:
		1327
		1328	{
		1329	version => 2,
		1330	"10.0.0.1" => {
		1331	"/" => {
		1332	"mythweb_id" => {
		1333	_expires => 1293917923,
		1334	value => "ooRung9dThee3ooyXooM1Ohm",
		1335	},
		1336	},
		1337	},
		1338	}
		1339
		1340	=item $date = AnyEvent::HTTP::format_date $timestamp
		1341
		1342	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		1343	Date (RFC 2616).
		1344
		1345	=item $timestamp = AnyEvent::HTTP::parse_date $date
		1346
		1347	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
		1348	bunch of minor variations of those, and returns the corresponding POSIX
		1349	timestamp, or C<undef> if the date cannot be parsed.
599		1350
600	=item $AnyEvent::HTTP::MAX_RECURSE	1351	=item $AnyEvent::HTTP::MAX_RECURSE
601		1352
602	The default value for the C<recurse> request parameter (default: C<10>).	1353	The default value for the C<recurse> request parameter (default: C<10>).
603		1354
		1355	=item $AnyEvent::HTTP::TIMEOUT
		1356
		1357	The default timeout for connection operations (default: C<300>).
		1358
604	=item $AnyEvent::HTTP::USERAGENT	1359	=item $AnyEvent::HTTP::USERAGENT
605		1360
606	The default value for the C<User-Agent> header (the default is	1361	The default value for the C<User-Agent> header (the default is
607	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1362	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
608		1363
609	=item $AnyEvent::HTTP::MAX_PERSISTENT	1364	=item $AnyEvent::HTTP::MAX_PER_HOST
610		1365
611	The maximum number of persistent connections to keep open (default: 8).	1366	The maximum number of concurrent connections to the same host (identified
		1367	by the hostname). If the limit is exceeded, then additional requests
		1368	are queued until previous connections are closed. Both persistent and
		1369	non-persistent connections are counted in this limit.
612		1370
613	Not implemented currently.	1371	The default value for this is C<4>, and it is highly advisable to not
		1372	increase it much.
		1373
		1374	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1375	connections, older browsers used 2, newer ones (such as firefox 3)
		1376	typically use 6, and Opera uses 8 because like, they have the fastest
		1377	browser and give a shit for everybody else on the planet.
614		1378
615	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	1379	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
616		1380
617	The maximum time to cache a persistent connection, in seconds (default: 2).	1381	The time after which idle persistent connections get closed by
618		1382	AnyEvent::HTTP (default: C<3>).
619	Not implemented currently.
620		1383
621	=item $AnyEvent::HTTP::ACTIVE	1384	=item $AnyEvent::HTTP::ACTIVE
622		1385
623	The number of active connections. This is not the number of currently	1386	The number of active connections. This is not the number of currently
624	running requests, but the number of currently open and non-idle TCP	1387	running requests, but the number of currently open and non-idle TCP
625	connections. This number of can be useful for load-leveling.	1388	connections. This number can be useful for load-leveling.
626		1389
627	=back	1390	=back
628		1391
629	=cut	1392	=cut
630		1393
		1394	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		1395	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		1396
		1397	sub format_date($) {
		1398	my ($time) = @_;
		1399
		1400	# RFC 822/1123 format
		1401	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		1402
		1403	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		1404	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		1405	$H, $M, $S;
		1406	}
		1407
		1408	sub parse_date($) {
		1409	my ($date) = @_;
		1410
		1411	my ($d, $m, $y, $H, $M, $S);
		1412
		1413	if ($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$/) {
		1414	# RFC 822/1123, required by RFC 2616 (with " ")
		1415	# cookie dates (with "-")
		1416
		1417	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		1418
		1419	} elsif ($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$/) {
		1420	# RFC 850
		1421	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		1422
		1423	} elsif ($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])$/) {
		1424	# ISO C's asctime
		1425	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		1426	}
		1427	# other formats fail in the loop below
		1428
		1429	for (0..11) {
		1430	if ($m eq $month[$_]) {
		1431	require Time::Local;
		1432	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
		1433	}
		1434	}
		1435
		1436	undef
		1437	}
		1438
631	sub set_proxy($) {	1439	sub set_proxy($) {
632	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	1440	if (length $_[0]) {
		1441	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
		1442	or Carp::croak "$_[0]: invalid proxy URL";
		1443	$PROXY = [$2, $3 \|\| 3128, $1]
		1444	} else {
		1445	undef $PROXY;
		1446	}
633	}	1447	}
634		1448
635	# initialise proxy from environment	1449	# initialise proxy from environment
		1450	eval {
636	set_proxy $ENV{http_proxy};	1451	set_proxy $ENV{http_proxy};
		1452	};
		1453
		1454	=head2 SHOWCASE
		1455
		1456	This section contains some more elaborate "real-world" examples or code
		1457	snippets.
		1458
		1459	=head2 HTTP/1.1 FILE DOWNLOAD
		1460
		1461	Downloading files with HTTP can be quite tricky, especially when something
		1462	goes wrong and you want to resume.
		1463
		1464	Here is a function that initiates and resumes a download. It uses the
		1465	last modified time to check for file content changes, and works with many
		1466	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1467	on older servers.
		1468
		1469	It calls the completion callback with either C<undef>, which means a
		1470	nonretryable error occurred, C<0> when the download was partial and should
		1471	be retried, and C<1> if it was successful.
		1472
		1473	use AnyEvent::HTTP;
		1474
		1475	sub download($$$) {
		1476	my ($url, $file, $cb) = @_;
		1477
		1478	open my $fh, "+<", $file
		1479	or die "$file: $!";
		1480
		1481	my %hdr;
		1482	my $ofs = 0;
		1483
		1484	if (stat $fh and -s _) {
		1485	$ofs = -s _;
		1486	warn "-s is ", $ofs;
		1487	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1488	$hdr{"range"} = "bytes=$ofs-";
		1489	}
		1490
		1491	http_get $url,
		1492	headers => \%hdr,
		1493	on_header => sub {
		1494	my ($hdr) = @_;
		1495
		1496	if ($hdr->{Status} == 200 && $ofs) {
		1497	# resume failed
		1498	truncate $fh, $ofs = 0;
		1499	}
		1500
		1501	sysseek $fh, $ofs, 0;
		1502
		1503	1
		1504	},
		1505	on_body => sub {
		1506	my ($data, $hdr) = @_;
		1507
		1508	if ($hdr->{Status} =~ /^2/) {
		1509	length $data == syswrite $fh, $data
		1510	or return; # abort on write errors
		1511	}
		1512
		1513	1
		1514	},
		1515	sub {
		1516	my (undef, $hdr) = @_;
		1517
		1518	my $status = $hdr->{Status};
		1519
		1520	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1521	utime $time, $time, $fh;
		1522	}
		1523
		1524	if ($status == 200 \|\| $status == 206 \|\| $status == 416) {
		1525	# download ok \|\| resume ok \|\| file already fully downloaded
		1526	$cb->(1, $hdr);
		1527
		1528	} elsif ($status == 412) {
		1529	# file has changed while resuming, delete and retry
		1530	unlink $file;
		1531	$cb->(0, $hdr);
		1532
		1533	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1534	# retry later
		1535	$cb->(0, $hdr);
		1536
		1537	} else {
		1538	$cb->(undef, $hdr);
		1539	}
		1540	}
		1541	;
		1542	}
		1543
		1544	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1545	if ($_[0]) {
		1546	print "OK!\n";
		1547	} elsif (defined $_[0]) {
		1548	print "please retry later\n";
		1549	} else {
		1550	print "ERROR\n";
		1551	}
		1552	};
		1553
		1554	=head3 SOCKS PROXIES
		1555
		1556	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		1557	compile your perl to support socks, or use an external program such as
		1558	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		1559	transparently.
		1560
		1561	Alternatively, for AnyEvent::HTTP only, you can use your own
		1562	C<tcp_connect> function that does the proxy handshake - here is an example
		1563	that works with socks4a proxies:
		1564
		1565	use Errno;
		1566	use AnyEvent::Util;
		1567	use AnyEvent::Socket;
		1568	use AnyEvent::Handle;
		1569
		1570	# host, port and username of/for your socks4a proxy
		1571	my $socks_host = "10.0.0.23";
		1572	my $socks_port = 9050;
		1573	my $socks_user = "";
		1574
		1575	sub socks4a_connect {
		1576	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		1577
		1578	my $hdl = new AnyEvent::Handle
		1579	connect => [$socks_host, $socks_port],
		1580	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1581	on_error => sub { $connect_cb->() },
		1582	;
		1583
		1584	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1585
		1586	$hdl->push_read (chunk => 8, sub {
		1587	my ($hdl, $chunk) = @_;
		1588	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1589
		1590	if ($status == 0x5a) {
		1591	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1592	} else {
		1593	$! = Errno::ENXIO; $connect_cb->();
		1594	}
		1595	});
		1596
		1597	$hdl
		1598	}
		1599
		1600	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1601	possibly after switching off other proxy types:
		1602
		1603	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1604
		1605	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1606	my ($data, $headers) = @_;
		1607	...
		1608	};
637		1609
638	=head1 SEE ALSO	1610	=head1 SEE ALSO
639		1611
640	L<AnyEvent>.	1612	L<AnyEvent>.
641		1613
642	=head1 AUTHOR	1614	=head1 AUTHOR
643		1615
644	Marc Lehmann <schmorp@schmorp.de>	1616	Marc Lehmann <schmorp@schmorp.de>
645	http://home.schmorp.de/	1617	http://home.schmorp.de/
646		1618
		1619	With many thanks to Дмитрий Шалашов, who provided countless
		1620	testcases and bugreports.
		1621
647	=cut	1622	=cut
648		1623
649	1	1624	1
650		1625

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.34 by root, Wed Oct 29 14:51:07 2008 UTC vs. Revision 1.138 by root, Fri Aug 5 20:45:09 2022 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.34 by root, Wed Oct 29 14:51:07 2008 UTC vs.
Revision 1.138 by root, Fri Aug 5 20:45:09 2022 UTC