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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.73 by root, Fri Dec 31 21:00:36 2010 UTC vs.
Revision 1.136 by root, Wed Oct 16 01:20:02 2019 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 = '1.5';	51	our $VERSION = 2.24;
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, $headers)
73		68
74	Executes an HTTP-GET request. See the http_request function for details on	69	Executes an HTTP-GET request. See the http_request function for details on
…		…
94	C<http_request> returns a "cancellation guard" - you have to keep the	89	C<http_request> returns a "cancellation guard" - you have to keep the
95	object at least alive until the callback get called. If the object gets	90	object at least alive until the callback get called. If the object gets
96	destroyed before the callback is called, the request will be cancelled.	91	destroyed before the callback is called, the request will be cancelled.
97		92
98	The callback will be called with the response body data as first argument	93	The callback will be called with the response body data as first argument
99	(or C<undef> if an error occured), and a hash-ref with response headers	94	(or C<undef> if an error occurred), and a hash-ref with response headers
100	(and trailers) as second argument.	95	(and trailers) as second argument.
101		96
102	All the headers in that hash are lowercased. In addition to the response	97	All the headers in that hash are lowercased. In addition to the response
103	headers, the "pseudo-headers" (uppercase to avoid clashing with possible	98	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
104	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the	99	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
…		…
122		117
123	If the server sends a header multiple times, then their contents will be	118	If the server sends a header multiple times, then their contents will be
124	joined together with a comma (C<,>), as per the HTTP spec.	119	joined together with a comma (C<,>), as per the HTTP spec.
125		120
126	If an internal error occurs, such as not being able to resolve a hostname,	121	If an internal error occurs, such as not being able to resolve a hostname,
127	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>	122	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be
128	(usually C<599>) and the C<Reason> pseudo-header will contain an error	123	C<590>-C<599> and the C<Reason> pseudo-header will contain an error
129	message.	124	message. Currently the following status codes are used:
		125
		126	=over 4
		127
		128	=item 595 - errors during connection establishment, proxy handshake.
		129
		130	=item 596 - errors during TLS negotiation, request sending and header processing.
		131
		132	=item 597 - errors during body receiving or processing.
		133
		134	=item 598 - user aborted request via C<on_header> or C<on_body>.
		135
		136	=item 599 - other, usually nonretryable, errors (garbled URL etc.).
		137
		138	=back
130		139
131	A typical callback might look like this:	140	A typical callback might look like this:
132		141
133	sub {	142	sub {
134	my ($body, $hdr) = @_;	143	my ($body, $hdr) = @_;
…		…
145		154
146	=over 4	155	=over 4
147		156
148	=item recurse => $count (default: $MAX_RECURSE)	157	=item recurse => $count (default: $MAX_RECURSE)
149		158
150	Whether to recurse requests or not, e.g. on redirects, authentication	159	Whether to recurse requests or not, e.g. on redirects, authentication and
151	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.
152		166
153	=item headers => hashref	167	=item headers => hashref
154		168
155	The request headers to use. Currently, C<http_request> may provide its own	169	The request headers to use. Currently, C<http_request> may provide its own
156	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and	170	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
157	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>	171	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>
158	(this can be suppressed by using C<undef> for these headers in which case	172	(this can be suppressed by using C<undef> for these headers in which case
159	they won't be sent at all).	173	they won't be sent at all).
160		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.
		181
161	=item timeout => $seconds	182	=item timeout => $seconds
162		183
163	The time-out to use for various stages - each connect attempt will reset	184	The time-out to use for various stages - each connect attempt will reset
164	the timeout, as will read or write activity, i.e. this is not an overall	185	the timeout, as will read or write activity, i.e. this is not an overall
165	timeout.	186	timeout.
166		187
167	Default timeout is 5 minutes.	188	Default timeout is 5 minutes.
168		189
169	=item proxy => [$host, $port[, $scheme]] or undef	190	=item proxy => [$host, $port[, $scheme]] or undef
170		191
171	Use the given http proxy for all requests. If not specified, then the	192	Use the given http proxy for all requests, or no proxy if C<undef> is
172	default proxy (as specified by C<$ENV{http_proxy}>) is used.	193	used.
173		194
174	C<$scheme> must be either missing, C<http> for HTTP or C<https> for	195	C<$scheme> must be either missing or must be C<http> for HTTP.
175	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>.
176		207
177	=item body => $string	208	=item body => $string
178		209
179	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
180	this module might offer more options).	211	this module might offer more options).
…		…
182	=item cookie_jar => $hash_ref	213	=item cookie_jar => $hash_ref
183		214
184	Passing this parameter enables (simplified) cookie-processing, loosely	215	Passing this parameter enables (simplified) cookie-processing, loosely
185	based on the original netscape specification.	216	based on the original netscape specification.
186		217
187	The C<$hash_ref> must be an (initially empty) hash reference which will	218	The C<$hash_ref> must be an (initially empty) hash reference which
188	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
189	persistent storage with something like JSON or Storable, but this is not	220	to persistent storage with something like JSON or Storable - see the
190	recommended, as session-only cookies might survive longer than expected.	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.
191		224
192	Note that this cookie implementation is not meant to be complete. If	225	Note that this cookie implementation is not meant to be complete. If
193	you want complete cookie management you have to do that on your	226	you want complete cookie management you have to do that on your
194	own. C<cookie_jar> is meant as a quick fix to get some cookie-using sites	227	own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites
195	working. Cookies are a privacy disaster, do not use them unless required	228	working. Cookies are a privacy disaster, do not use them unless required
196	to.	229	to.
197		230
198	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>	231	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
199	headers will be set and handled by this module, otherwise they will be	232	headers will be set and handled by this module, otherwise they will be
…		…
209	verification) TLS context.	242	verification) TLS context.
210		243
211	The default for this option is C<low>, which could be interpreted as "give	244	The default for this option is C<low>, which could be interpreted as "give
212	me the page, no matter what".	245	me the page, no matter what".
213		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
214	=item on_prepare => $callback->($fh)	259	=item on_prepare => $callback->($fh)
215		260
216	In rare cases you need to "tune" the socket before it is used to	261	In rare cases you need to "tune" the socket before it is used to
217	connect (for exmaple, to bind it on a given IP address). This parameter	262	connect (for example, to bind it on a given IP address). This parameter
218	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	263	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
219	and behaves exactly the same way (e.g. it has to provide a	264	and behaves exactly the same way (e.g. it has to provide a
220	timeout). See the description for the C<$prepare_cb> argument of	265	timeout). See the description for the C<$prepare_cb> argument of
221	C<AnyEvent::Socket::tcp_connect> for details.	266	C<AnyEvent::Socket::tcp_connect> for details.
222		267
…		…
225	In even rarer cases you want total control over how AnyEvent::HTTP	270	In even rarer cases you want total control over how AnyEvent::HTTP
226	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>	271	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
227	to do this, but you can provide your own C<tcp_connect> function -	272	to do this, but you can provide your own C<tcp_connect> function -
228	obviously, it has to follow the same calling conventions, except that it	273	obviously, it has to follow the same calling conventions, except that it
229	may always return a connection guard object.	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<$tcp_connect>
		279	function is incompatible with this kind of re-use, consider switching off
		280	C<persistent> connections and/or providing a C<sessionid> identifier.
230		281
231	There are probably lots of weird uses for this function, starting from	282	There are probably lots of weird uses for this function, starting from
232	tracing the hosts C<http_request> actually tries to connect, to (inexact	283	tracing the hosts C<http_request> actually tries to connect, to (inexact
233	but fast) host => IP address caching or even socks protocol support.	284	but fast) host => IP address caching or even socks protocol support.
234		285
…		…
287	called. Instead of the C<$body> argument containing the body data, the	338	called. Instead of the C<$body> argument containing the body data, the
288	callback will receive the L<AnyEvent::Handle> object associated with the	339	callback will receive the L<AnyEvent::Handle> object associated with the
289	connection. In error cases, C<undef> will be passed. When there is no body	340	connection. In error cases, C<undef> will be passed. When there is no body
290	(e.g. status C<304>), the empty string will be passed.	341	(e.g. status C<304>), the empty string will be passed.
291		342
292	The handle object might or might not be in TLS mode, might be connected to	343	The handle object might or might not be in TLS mode, might be connected
293	a proxy, be a persistent connection etc., and configured in unspecified	344	to a proxy, be a persistent connection, use chunked transfer encoding
294	ways. The user is responsible for this handle (it will not be used by this	345	etc., and configured in unspecified ways. The user is responsible for this
295	module anymore).	346	handle (it will not be used by this module anymore).
296		347
297	This is useful with some push-type services, where, after the initial	348	This is useful with some push-type services, where, after the initial
298	headers, an interactive protocol is used (typical example would be the	349	headers, an interactive protocol is used (typical example would be the
299	push-style twitter API which starts a JSON/XML stream).	350	push-style twitter API which starts a JSON/XML stream).
300		351
301	If you think you need this, first have a look at C<on_body>, to see if	352	If you think you need this, first have a look at C<on_body>, to see if
302	that doesn't solve your problem in a better way.	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 => $boolean
		374
		375	Only used when C<persistent> is also true. This parameter decides whether
		376	C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection
		377	(as opposed to only a HTTP/1.1 persistent connection).
		378
		379	The default is true, except when using a proxy, in which case it defaults
		380	to false, as HTTP/1.0 proxies cannot support this in a meaningful way.
		381
		382	=item handle_params => { key => value ... }
		383
		384	The key-value pairs in this hash will be passed to any L<AnyEvent::Handle>
		385	constructor that is called - not all requests will create a handle, and
		386	sometimes more than one is created, so this parameter is only good for
		387	setting hints.
		388
		389	Example: set the maximum read size to 4096, to potentially conserve memory
		390	at the cost of speed.
		391
		392	handle_params => {
		393	max_read_size => 4096,
		394	},
303		395
304	=back	396	=back
305		397
306	Example: do a simple HTTP GET request for http://www.nethype.de/ and print	398	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
307	the response body.	399	the response body.
…		…
313		405
314	Example: do a HTTP HEAD request on https://www.google.com/, use a	406	Example: do a HTTP HEAD request on https://www.google.com/, use a
315	timeout of 30 seconds.	407	timeout of 30 seconds.
316		408
317	http_request	409	http_request
318	GET => "https://www.google.com",	410	HEAD => "https://www.google.com",
		411	headers => { "user-agent" => "MySearchClient 1.0" },
319	timeout => 30,	412	timeout => 30,
320	sub {	413	sub {
321	my ($body, $hdr) = @_;	414	my ($body, $hdr) = @_;
322	use Data::Dumper;	415	use Data::Dumper;
323	print Dumper $hdr;	416	print Dumper $hdr;
…		…
333	};	426	};
334		427
335	undef $request;	428	undef $request;
336		429
337	=cut	430	=cut
		431
		432	#############################################################################
		433	# wait queue/slots
338		434
339	sub _slot_schedule;	435	sub _slot_schedule;
340	sub _slot_schedule($) {	436	sub _slot_schedule($) {
341	my $host = shift;	437	my $host = shift;
342		438
…		…
364	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	460	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
365		461
366	_slot_schedule $_[0];	462	_slot_schedule $_[0];
367	}	463	}
368		464
		465	#############################################################################
		466	# cookie handling
		467
		468	# expire cookies
		469	sub cookie_jar_expire($;$) {
		470	my ($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
369	# extract cookies from jar	498	# extract cookies from jar
370	sub cookie_jar_extract($$$$) {	499	sub cookie_jar_extract($$$$) {
371	my ($jar, $uscheme, $uhost, $upath) = @_;	500	my ($jar, $scheme, $host, $path) = @_;
372		501
373	%$jar = () if $jar->{version} != 1;	502	%$jar = () if $jar->{version} != 2;
		503
		504	$host = AnyEvent::Util::idn_to_ascii $host
		505	if $host =~ /[^\x00-\x7f]/;
374		506
375	my @cookies;	507	my @cookies;
376		508
377	while (my ($chost, $paths) = each %$jar) {	509	while (my ($chost, $paths) = each %$jar) {
378	next unless ref $paths;	510	next unless ref $paths;
379		511
380	if ($chost =~ /^\./) {	512	# exact match or suffix including . match
381	next unless $chost eq substr $uhost, -length $chost;	513	$chost eq $host or ".$chost" eq substr $host, -1 - length $chost
382	} elsif ($chost =~ /\./) {
383	next unless $chost eq $uhost;
384	} else {
385	next;	514	or next;
386	}
387		515
388	while (my ($cpath, $cookies) = each %$paths) {	516	while (my ($cpath, $cookies) = each %$paths) {
389	next unless $cpath eq substr $upath, 0, length $cpath;	517	next unless $cpath eq substr $path, 0, length $cpath;
390		518
391	while (my ($cookie, $kv) = each %$cookies) {	519	while (my ($cookie, $kv) = each %$cookies) {
392	next if $uscheme ne "https" && exists $kv->{secure};	520	next if $scheme ne "https" && exists $kv->{secure};
393		521
394	if (exists $kv->{expires}) {	522	if (exists $kv->{_expires} and AE::now > $kv->{_expires}) {
395	if (AE::now > parse_date ($kv->{expires})) {
396	delete $cookies->{$cookie};	523	delete $cookies->{$cookie};
397	next;	524	next;
398	}
399	}	525	}
400		526
401	my $value = $kv->{value};	527	my $value = $kv->{value};
402		528
403	if ($value =~ /[=;,[:space:]]/) {	529	if ($value =~ /[=;,[:space:]]/) {
…		…
412		538
413	\@cookies	539	\@cookies
414	}	540	}
415		541
416	# parse set_cookie header into jar	542	# parse set_cookie header into jar
417	sub cookie_jar_set_cookie($$$) {	543	sub cookie_jar_set_cookie($$$$) {
418	my ($jar, $set_cookie, $uhost) = @_;	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
419		550
420	for ($set_cookie) {	551	for ($set_cookie) {
421	# parse NAME=VALUE	552	# parse NAME=VALUE
422	my @kv;	553	my @kv;
423		554
		555	# expires is not http-compliant in the original cookie-spec,
		556	# we support the official date format and some extensions
424	while (	557	while (
425	m{	558	m{
426	\G\s*	559	\G\s*
427	(?:	560	(?:
428	expires \s=\s ([A-Z][a-z][a-z],\ [^,;]+)	561	expires \s=\s ([A-Z][a-z][a-z]+,\ [^,;]+)
429	\| ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )	562	\| ([^=;,[:space:]]+) (?: \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^;,[:space:]]) ) )?
430	)	563	)
431	}gcxsi	564	}gcxsi
432	) {	565	) {
433	my $name = $2;	566	my $name = $2;
434	my $value = $4;	567	my $value = $4;
435		568
436	unless (defined $name) {	569	if (defined $1) {
437	# expires	570	# expires
438	$name = "expires";	571	$name = "expires";
439	$value = $1;	572	$value = $1;
440	} elsif (!defined $value) {	573	} elsif (defined $3) {
441	# quoted	574	# quoted
442	$value = $3;	575	$value = $3;
443	$value =~ s/\\(.)/$1/gs;	576	$value =~ s/\\(.)/$1/gs;
444	}	577	}
445		578
446	push @kv, lc $name, $value;	579	push @kv, @kv ? lc $name : $name, $value;
447		580
448	last unless /\G\s*;/gc;	581	last unless /\G\s*;/gc;
449	}	582	}
450		583
451	last unless @kv;	584	last unless @kv;
452		585
453	my $name = shift @kv;	586	my $name = shift @kv;
454	my %kv = (value => shift @kv, @kv);	587	my %kv = (value => shift @kv, @kv);
455		588
456	$kv{expires} \|\|= format_date (AE::now + $kv{"max-age"})
457	if exists $kv{"max-age"};	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	}
458		597
459	my $cdom;	598	my $cdom;
460	my $cpath = (delete $kv{path}) \|\| "/";	599	my $cpath = (delete $kv{path}) \|\| "/";
461		600
462	if (exists $kv{domain}) {	601	if (exists $kv{domain}) {
463	$cdom = delete $kv{domain};	602	$cdom = $kv{domain};
464		603
465	$cdom =~ s/^\.?/./; # make sure it starts with a "."	604	$cdom =~ s/^\.?/./; # make sure it starts with a "."
466		605
467	next if $cdom =~ /\.$/;	606	next if $cdom =~ /\.$/;
468		607
469	# this is not rfc-like and not netscape-like. go figure.	608	# this is not rfc-like and not netscape-like. go figure.
470	my $ndots = $cdom =~ y/.//;	609	my $ndots = $cdom =~ y/.//;
471	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	610	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		611
		612	$cdom = substr $cdom, 1; # remove initial .
472	} else {	613	} else {
473	$cdom = $uhost;	614	$cdom = $host;
474	}	615	}
475		616
476	# store it	617	# store it
477	$jar->{version} = 1;	618	$jar->{version} = 2;
478	$jar->{$cdom}{$cpath}{$name} = \%kv;	619	$jar->{lc $cdom}{$cpath}{$name} = \%kv;
479		620
480	redo if /\G\s*,/gc;	621	redo if /\G\s*,/gc;
481	}	622	}
482	}	623	}
483		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
484	# continue to parse $_ for headers and place them into the arg	667	# continue to parse $_ for headers and place them into the arg
485	sub parse_hdr() {	668	sub _parse_hdr() {
486	my %hdr;	669	my %hdr;
487		670
488	# things seen, not parsed:	671	# things seen, not parsed:
489	# p3pP="NON CUR OTPi OUR NOR UNI"	672	# p3pP="NON CUR OTPi OUR NOR UNI"
490		673
…		…
504	for values %hdr;	687	for values %hdr;
505		688
506	\%hdr	689	\%hdr
507	}	690	}
508		691
		692	#############################################################################
		693	# http_get
		694
509	our $qr_nlnl = qr{(?<![^\012])\015?\012};	695	our $qr_nlnl = qr{(?<![^\012])\015?\012};
510		696
511	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	697	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
512	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	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(\%$$) {
		710	my ($state, $cb, $hdr) = @_;
		711
		712	&_destroy_state ($state);
		713
		714	$cb->(undef, $hdr);
		715	()
		716	}
		717
		718	our %IDEMPOTENT = (
		719	DELETE => 1,
		720	GET => 1,
		721	HEAD => 1,
		722	OPTIONS => 1,
		723	PUT => 1,
		724	TRACE => 1,
		725
		726	ACL => 1,
		727	"BASELINE-CONTROL" => 1,
		728	BIND => 1,
		729	CHECKIN => 1,
		730	CHECKOUT => 1,
		731	COPY => 1,
		732	LABEL => 1,
		733	LINK => 1,
		734	MERGE => 1,
		735	MKACTIVITY => 1,
		736	MKCALENDAR => 1,
		737	MKCOL => 1,
		738	MKREDIRECTREF => 1,
		739	MKWORKSPACE => 1,
		740	MOVE => 1,
		741	ORDERPATCH => 1,
		742	PROPFIND => 1,
		743	PROPPATCH => 1,
		744	REBIND => 1,
		745	REPORT => 1,
		746	SEARCH => 1,
		747	UNBIND => 1,
		748	UNCHECKOUT => 1,
		749	UNLINK => 1,
		750	UNLOCK => 1,
		751	UPDATE => 1,
		752	UPDATEREDIRECTREF => 1,
		753	"VERSION-CONTROL" => 1,
		754	);
513		755
514	sub http_request($$@) {	756	sub http_request($$@) {
515	my $cb = pop;	757	my $cb = pop;
516	my ($method, $url, %arg) = @_;	758	my ($method, $url, %arg) = @_;
517		759
…		…
535	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	777	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
536		778
537	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })	779	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
538	if $recurse < 0;	780	if $recurse < 0;
539		781
540	my $proxy = $arg{proxy} \|\| $PROXY;	782	my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY;
541	my $timeout = $arg{timeout} \|\| $TIMEOUT;	783	my $timeout = $arg{timeout} \|\| $TIMEOUT;
542		784
543	my ($uscheme, $uauthority, $upath, $query, $fragment) =	785	my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment
544	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;	786	$url =~ m\|^([^:]+):(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?$\|;
545		787
546	$uscheme = lc $uscheme;	788	$uscheme = lc $uscheme;
547		789
548	my $uport = $uscheme eq "http" ? 80	790	my $uport = $uscheme eq "http" ? 80
549	: $uscheme eq "https" ? 443	791	: $uscheme eq "https" ? 443
550	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });	792	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
551		793
552	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	794	$uauthority =~ /^(?: .*\@ )? ([^\@]+?) (?: : (\d+) )?$/x
553	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });	795	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
554		796
555	my $uhost = $1;	797	my $uhost = lc $1;
556	$uport = $2 if defined $2;	798	$uport = $2 if defined $2;
557		799
558	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	800	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
559	unless exists $hdr{host};	801	unless exists $hdr{host};
560		802
…		…
579	$rscheme = "http" unless defined $rscheme;	821	$rscheme = "http" unless defined $rscheme;
580		822
581	# don't support https requests over https-proxy transport,	823	# don't support https requests over https-proxy transport,
582	# can't be done with tls as spec'ed, unless you double-encrypt.	824	# can't be done with tls as spec'ed, unless you double-encrypt.
583	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	825	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		826
		827	$rhost = lc $rhost;
		828	$rscheme = lc $rscheme;
584	} else {	829	} else {
585	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	830	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
586	}	831	}
587		832
588	# leave out fragment and query string, just a heuristic	833	# leave out fragment and query string, just a heuristic
…		…
590	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};	835	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
591		836
592	$hdr{"content-length"} = length $arg{body}	837	$hdr{"content-length"} = length $arg{body}
593	if length $arg{body} \|\| $method ne "GET";	838	if length $arg{body} \|\| $method ne "GET";
594		839
595	$hdr{connection} = "close TE"; #1.1	840	my $idempotent = $IDEMPOTENT{$method};
		841
		842	# default value for keepalive is true iff the request is for an idempotent method
		843	my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent;
		844	my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy;
		845	my $was_persistent; # true if this is actually a recycled connection
		846
		847	# the key to use in the keepalive cache
		848	my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}";
		849
		850	$hdr{connection} = ($persistent ? $keepalive ? "keep-alive, " : "" : "close, ") . "Te"; #1.1
596	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1	851	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
597		852
598	my %state = (connect_guard => 1);	853	my %state = (connect_guard => 1);
		854
		855	my $ae_error = 595; # connecting
		856
		857	# handle actual, non-tunneled, request
		858	my $handle_actual_request = sub {
		859	$ae_error = 596; # request phase
		860
		861	my $hdl = $state{handle};
		862
		863	$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls};
		864
		865	# send request
		866	$hdl->push_write (
		867	"$method $rpath HTTP/1.1\015\012"
		868	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		869	. "\015\012"
		870	. $arg{body}
		871	);
		872
		873	# return if error occurred during push_write()
		874	return unless %state;
		875
		876	# reduce memory usage, save a kitten, also re-use it for the response headers.
		877	%hdr = ();
		878
		879	# status line and headers
		880	$state{read_response} = sub {
		881	return unless %state;
		882
		883	for ("$_[1]") {
		884	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		885
		886	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
		887	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" };
		888
		889	# 100 Continue handling
		890	# should not happen as we don't send expect: 100-continue,
		891	# but we handle it just in case.
		892	# since we send the request body regardless, if we get an error
		893	# we are out of-sync, which we currently do NOT handle correctly.
		894	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
		895	if $2 eq 100;
		896
		897	push @pseudo,
		898	HTTPVersion => $1,
		899	Status => $2,
		900	Reason => $3,
		901	;
		902
		903	my $hdr = _parse_hdr
		904	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" };
		905
		906	%hdr = (%$hdr, @pseudo);
		907	}
		908
		909	# redirect handling
		910	# relative uri handling forced by microsoft and other shitheads.
		911	# we give our best and fall back to URI if available.
		912	if (exists $hdr{location}) {
		913	my $loc = $hdr{location};
		914
		915	if ($loc =~ m%^//%) { # //
		916	$loc = "$uscheme:$loc";
		917
		918	} elsif ($loc eq "") {
		919	$loc = $url;
		920
		921	} elsif ($loc !~ /^(?: $ \| [^:\/?\#]+ : )/x) { # anything "simple"
		922	$loc =~ s/^\.\/+//;
		923
		924	if ($loc !~ m%^[.?#]%) {
		925	my $prefix = "$uscheme://$uauthority";
		926
		927	unless ($loc =~ s/^\///) {
		928	$prefix .= $upath;
		929	$prefix =~ s/\/[^\/]*$//;
		930	}
		931
		932	$loc = "$prefix/$loc";
		933
		934	} elsif (eval { require URI }) { # uri
		935	$loc = URI->new_abs ($loc, $url)->as_string;
		936
		937	} else {
		938	return _error %state, $cb, { @pseudo, Status => 599, Reason => "Cannot parse Location (URI module missing)" };
		939	#$hdr{Status} = 599;
		940	#$hdr{Reason} = "Unparsable Redirect (URI module missing)";
		941	#$recurse = 0;
		942	}
		943	}
		944
		945	$hdr{location} = $loc;
		946	}
		947
		948	my $redirect;
		949
		950	if ($recurse) {
		951	my $status = $hdr{Status};
		952
		953	# industry standard is to redirect POST as GET for
		954	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		955	# also, the UA should ask the user for 301 and 307 and POST,
		956	# industry standard seems to be to simply follow.
		957	# we go with the industry standard. 308 is defined
		958	# by rfc7538
		959	if ($status == 301 or $status == 302 or $status == 303) {
		960	$redirect = 1;
		961	# HTTP/1.1 is unclear on how to mutate the method
		962	unless ($method eq "HEAD") {
		963	$method = "GET";
		964	delete $arg{body};
		965	}
		966	} elsif ($status == 307 or $status == 308) {
		967	$redirect = 1;
		968	}
		969	}
		970
		971	my $finish = sub { # ($data, $err_status, $err_reason[, $persistent])
		972	if ($state{handle}) {
		973	# handle keepalive
		974	if (
		975	$persistent
		976	&& $_[3]
		977	&& ($hdr{HTTPVersion} < 1.1
		978	? $hdr{connection} =~ /\bkeep-?alive\b/i
		979	: $hdr{connection} !~ /\bclose\b/i)
		980	) {
		981	ka_store $ka_key, delete $state{handle};
		982	} else {
		983	# no keepalive, destroy the handle
		984	$state{handle}->destroy;
		985	}
		986	}
		987
		988	%state = ();
		989
		990	if (defined $_[1]) {
		991	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		992	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		993	}
		994
		995	# set-cookie processing
		996	if ($arg{cookie_jar}) {
		997	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date};
		998	}
		999
		1000	if ($redirect && exists $hdr{location}) {
		1001	# we ignore any errors, as it is very common to receive
		1002	# Content-Length != 0 but no actual body
		1003	# we also access %hdr, as $_[1] might be an erro
		1004	$state{recurse} =
		1005	http_request (
		1006	$method => $hdr{location},
		1007	%arg,
		1008	recurse => $recurse - 1,
		1009	Redirect => [$_[0], \%hdr],
		1010	sub {
		1011	%state = ();
		1012	&$cb
		1013	},
		1014	);
		1015	} else {
		1016	$cb->($_[0], \%hdr);
		1017	}
		1018	};
		1019
		1020	$ae_error = 597; # body phase
		1021
		1022	my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct...
		1023
		1024	my $len = $chunked ? undef : $hdr{"content-length"};
		1025
		1026	# body handling, many different code paths
		1027	# - no body expected
		1028	# - want_body_handle
		1029	# - te chunked
		1030	# - 2x length known (with or without on_body)
		1031	# - 2x length not known (with or without on_body)
		1032	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		1033	$finish->(undef, 598 => "Request cancelled by on_header");
		1034	} elsif (
		1035	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		1036	or $method eq "HEAD"
		1037	or (defined $len && $len == 0) # == 0, not !, because "0 " is true
		1038	) {
		1039	# no body
		1040	$finish->("", undef, undef, 1);
		1041
		1042	} elsif (!$redirect && $arg{want_body_handle}) {
		1043	$_[0]->on_eof (undef);
		1044	$_[0]->on_error (undef);
		1045	$_[0]->on_read (undef);
		1046
		1047	$finish->(delete $state{handle});
		1048
		1049	} elsif ($chunked) {
		1050	my $cl = 0;
		1051	my $body = "";
		1052	my $on_body = (!$redirect && $arg{on_body}) \|\| sub { $body .= shift; 1 };
		1053
		1054	$state{read_chunk} = sub {
		1055	$_[1] =~ /^([0-9a-fA-F]+)/
		1056	or return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1057
		1058	my $len = hex $1;
		1059
		1060	if ($len) {
		1061	$cl += $len;
		1062
		1063	$_[0]->push_read (chunk => $len, sub {
		1064	$on_body->($_[1], \%hdr)
		1065	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1066
		1067	$_[0]->push_read (line => sub {
		1068	length $_[1]
		1069	and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding");
		1070	$_[0]->push_read (line => $state{read_chunk});
		1071	});
		1072	});
		1073	} else {
		1074	$hdr{"content-length"} \|\|= $cl;
		1075
		1076	$_[0]->push_read (line => $qr_nlnl, sub {
		1077	if (length $_[1]) {
		1078	for ("$_[1]") {
		1079	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		1080
		1081	my $hdr = _parse_hdr
		1082	or return $finish->(undef, $ae_error => "Garbled response trailers");
		1083
		1084	%hdr = (%hdr, %$hdr);
		1085	}
		1086	}
		1087
		1088	$finish->($body, undef, undef, 1);
		1089	});
		1090	}
		1091	};
		1092
		1093	$_[0]->push_read (line => $state{read_chunk});
		1094
		1095	} elsif (!$redirect && $arg{on_body}) {
		1096	if (defined $len) {
		1097	$_[0]->on_read (sub {
		1098	$len -= length $_[0]{rbuf};
		1099
		1100	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1101	or return $finish->(undef, 598 => "Request cancelled by on_body");
		1102
		1103	$len > 0
		1104	or $finish->("", undef, undef, 1);
		1105	});
		1106	} else {
		1107	$_[0]->on_eof (sub {
		1108	$finish->("");
		1109	});
		1110	$_[0]->on_read (sub {
		1111	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		1112	or $finish->(undef, 598 => "Request cancelled by on_body");
		1113	});
		1114	}
		1115	} else {
		1116	$_[0]->on_eof (undef);
		1117
		1118	if (defined $len) {
		1119	$_[0]->on_read (sub {
		1120	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		1121	if $len <= length $_[0]{rbuf};
		1122	});
		1123	} else {
		1124	$_[0]->on_error (sub {
		1125	($! == Errno::EPIPE \|\| !$!)
		1126	? $finish->(delete $_[0]{rbuf})
		1127	: $finish->(undef, $ae_error => $_[2]);
		1128	});
		1129	$_[0]->on_read (sub { });
		1130	}
		1131	}
		1132	};
		1133
		1134	# if keepalive is enabled, then the server closing the connection
		1135	# before a response can happen legally - we retry on idempotent methods.
		1136	if ($was_persistent && $idempotent) {
		1137	my $old_eof = $hdl->{on_eof};
		1138	$hdl->{on_eof} = sub {
		1139	_destroy_state %state;
		1140
		1141	%state = ();
		1142	$state{recurse} =
		1143	http_request (
		1144	$method => $url,
		1145	%arg,
		1146	recurse => $recurse - 1,
		1147	persistent => 0,
		1148	sub {
		1149	%state = ();
		1150	&$cb
		1151	}
		1152	);
		1153	};
		1154	$hdl->on_read (sub {
		1155	return unless %state;
		1156
		1157	# as soon as we receive something, a connection close
		1158	# once more becomes a hard error
		1159	$hdl->{on_eof} = $old_eof;
		1160	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1161	});
		1162	} else {
		1163	$hdl->push_read (line => $qr_nlnl, $state{read_response});
		1164	}
		1165	};
		1166
		1167	my $prepare_handle = sub {
		1168	my ($hdl) = $state{handle};
		1169
		1170	$hdl->on_error (sub {
		1171	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] };
		1172	});
		1173	$hdl->on_eof (sub {
		1174	_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" };
		1175	});
		1176	$hdl->timeout_reset;
		1177	$hdl->timeout ($timeout);
		1178	};
		1179
		1180	# connected to proxy (or origin server)
		1181	my $connect_cb = sub {
		1182	my $fh = shift
		1183	or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" };
		1184
		1185	return unless delete $state{connect_guard};
		1186
		1187	# get handle
		1188	$state{handle} = new AnyEvent::Handle
		1189	%{ $arg{handle_params} },
		1190	fh => $fh,
		1191	peername => $uhost,
		1192	tls_ctx => $arg{tls_ctx},
		1193	;
		1194
		1195	$prepare_handle->();
		1196
		1197	#$state{handle}->starttls ("connect") if $rscheme eq "https";
		1198
		1199	# now handle proxy-CONNECT method
		1200	if ($proxy && $uscheme eq "https") {
		1201	# oh dear, we have to wrap it into a connect request
		1202
		1203	my $auth = exists $hdr{"proxy-authorization"}
		1204	? "proxy-authorization: " . (delete $hdr{"proxy-authorization"}) . "\015\012"
		1205	: "";
		1206
		1207	# maybe re-use $uauthority with patched port?
		1208	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012$auth\015\012");
		1209	$state{handle}->push_read (line => $qr_nlnl, sub {
		1210	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		1211	or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" };
		1212
		1213	if ($2 == 200) {
		1214	$rpath = $upath;
		1215	$handle_actual_request->();
		1216	} else {
		1217	_error %state, $cb, { @pseudo, Status => $2, Reason => $3 };
		1218	}
		1219	});
		1220	} else {
		1221	delete $hdr{"proxy-authorization"} unless $proxy;
		1222
		1223	$handle_actual_request->();
		1224	}
		1225	};
599		1226
600	_get_slot $uhost, sub {	1227	_get_slot $uhost, sub {
601	$state{slot_guard} = shift;	1228	$state{slot_guard} = shift;
602		1229
603	return unless $state{connect_guard};	1230	return unless $state{connect_guard};
604		1231
605	my $connect_cb = sub {	1232	# try to use an existing keepalive connection, but only if we, ourselves, plan
606	$state{fh} = shift	1233	# on a keepalive request (in theory, this should be a separate config option).
607	or do {	1234	if ($persistent && $KA_CACHE{$ka_key}) {
608	my $err = "$!";	1235	$was_persistent = 1;
609	%state = ();
610	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
611	};
612		1236
613	pop; # free memory, save a tree	1237	$state{handle} = ka_fetch $ka_key;
614		1238	# $state{handle}->destroyed
615	return unless delete $state{connect_guard};	1239	# and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d#
616		1240	$prepare_handle->();
617	# get handle	1241	# $state{handle}->destroyed
618	$state{handle} = new AnyEvent::Handle	1242	# and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d#
619	fh => $state{fh},
620	peername => $rhost,
621	tls_ctx => $arg{tls_ctx},
622	# these need to be reconfigured on keepalive handles
623	timeout => $timeout,
624	on_error => sub {
625	%state = ();
626	$cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
627	},
628	on_eof => sub {
629	%state = ();
630	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
631	},
632	;
633
634	# limit the number of persistent connections
635	# keepalive not yet supported
636	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
637	# ++$KA_COUNT{$_[1]};
638	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
639	# --$KA_COUNT{$_[1]}
640	# };
641	# $hdr{connection} = "keep-alive";
642	# }
643
644	$state{handle}->starttls ("connect") if $rscheme eq "https";
645
646	# handle actual, non-tunneled, request
647	my $handle_actual_request = sub {
648	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
649
650	# send request
651	$state{handle}->push_write (
652	"$method $rpath HTTP/1.1\015\012"
653	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
654	. "\015\012"
655	. (delete $arg{body})
656	);
657
658	# return if error occured during push_write()
659	return unless %state;
660
661	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
662
663	# status line and headers
664	$state{read_response} = sub {
665	for ("$_[1]") {
666	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
667
668	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc
669	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
670
671	# 100 Continue handling
672	# should not happen as we don't send expect: 100-continue,
673	# but we handle it just in case.
674	# since we send the request body regardless, if we get an error
675	# we are out of-sync, which we currently do NOT handle correctly.
676	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
677	if $2 eq 100;
678
679	push @pseudo,
680	HTTPVersion => $1,
681	Status => $2,
682	Reason => $3,
683	;
684
685	my $hdr = parse_hdr
686	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
687
688	%hdr = (%$hdr, @pseudo);
689	}
690
691	# redirect handling
692	# microsoft and other shitheads don't give a shit for following standards,
693	# try to support some common forms of broken Location headers.
694	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
695	$hdr{location} =~ s/^\.\/+//;
696
697	my $url = "$rscheme://$uhost:$uport";
698
699	unless ($hdr{location} =~ s/^\///) {
700	$url .= $upath;
701	$url =~ s/\/[^\/]*$//;
702	}
703
704	$hdr{location} = "$url/$hdr{location}";
705	}
706
707	my $redirect;
708
709	if ($recurse) {
710	my $status = $hdr{Status};
711
712	# industry standard is to redirect POST as GET for
713	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
714	# also, the UA should ask the user for 301 and 307 and POST,
715	# industry standard seems to be to simply follow.
716	# we go with the industry standard.
717	if ($status == 301 or $status == 302 or $status == 303) {
718	# HTTP/1.1 is unclear on how to mutate the method
719	$method = "GET" unless $method eq "HEAD";
720	$redirect = 1;
721	} elsif ($status == 307) {
722	$redirect = 1;
723	}
724	}
725
726	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
727	my $keepalive = pop;
728
729	$state{handle}->destroy if $state{handle};
730	%state = ();
731
732	if (defined $_[1]) {
733	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
734	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
735	}
736
737	# set-cookie processing
738	if ($arg{cookie_jar}) {
739	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost;
740	}
741
742	if ($redirect && exists $hdr{location}) {
743	# we ignore any errors, as it is very common to receive
744	# Content-Length != 0 but no actual body
745	# we also access %hdr, as $_[1] might be an erro
746	http_request (
747	$method => $hdr{location},
748	%arg,
749	recurse => $recurse - 1,
750	Redirect => [$_[0], \%hdr],
751	$cb);
752	} else {
753	$cb->($_[0], \%hdr);
754	}
755	};
756
757	my $len = $hdr{"content-length"};
758
759	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
760	$finish->(undef, 598 => "Request cancelled by on_header");
761	} elsif (
762	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
763	or $method eq "HEAD"
764	or (defined $len && !$len)
765	) {
766	# no body
767	$finish->("", undef, undef, 1);
768	} else {
769	# body handling, many different code paths
770	# - no body expected
771	# - want_body_handle
772	# - te chunked
773	# - 2x length known (with or without on_body)
774	# - 2x length not known (with or without on_body)
775	if (!$redirect && $arg{want_body_handle}) {
776	$_[0]->on_eof (undef);
777	$_[0]->on_error (undef);
778	$_[0]->on_read (undef);
779
780	$finish->(delete $state{handle});
781
782	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
783	my $cl = 0;
784	my $body = undef;
785	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
786
787	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
788
789	my $read_chunk; $read_chunk = sub {
790	$_[1] =~ /^([0-9a-fA-F]+)/
791	or $finish->(undef, 599 => "Garbled chunked transfer encoding");
792
793	my $len = hex $1;
794
795	if ($len) {
796	$cl += $len;
797
798	$_[0]->push_read (chunk => $len, sub {
799	$on_body->($_[1], \%hdr)
800	or return $finish->(undef, 598 => "Request cancelled by on_body");
801
802	$_[0]->push_read (line => sub {
803	length $_[1]
804	and return $finish->(undef, 599 => "Garbled chunked transfer encoding");
805	$_[0]->push_read (line => $read_chunk);
806	});
807	});
808	} else {
809	$hdr{"content-length"} \|\|= $cl;
810
811	$_[0]->push_read (line => $qr_nlnl, sub {
812	if (length $_[1]) {
813	for ("$_[1]") {
814	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
815
816	my $hdr = parse_hdr
817	or return $finish->(undef, 599 => "Garbled response trailers");
818
819	%hdr = (%hdr, %$hdr);
820	}
821	}
822
823	$finish->($body, undef, undef, 1);
824	});
825	}
826	};
827
828	$_[0]->push_read (line => $read_chunk);
829
830	} elsif ($arg{on_body}) {
831	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
832
833	if ($len) {
834	$_[0]->on_read (sub {
835	$len -= length $_[0]{rbuf};
836
837	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
838	or return $finish->(undef, 598 => "Request cancelled by on_body");
839
840	$len > 0
841	or $finish->("", undef, undef, 1);
842	});
843	} else {
844	$_[0]->on_eof (sub {
845	$finish->("");
846	});
847	$_[0]->on_read (sub {
848	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
849	or $finish->(undef, 598 => "Request cancelled by on_body");
850	});
851	}
852	} else {
853	$_[0]->on_eof (undef);
854
855	if ($len) {
856	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
857	$_[0]->on_read (sub {
858	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
859	if $len <= length $_[0]{rbuf};
860	});
861	} else {
862	$_[0]->on_error (sub {
863	($! == Errno::EPIPE \|\| !$!)
864	? $finish->(delete $_[0]{rbuf})
865	: $finish->(undef, 599 => $_[2]);
866	});
867	$_[0]->on_read (sub { });
868	}
869	}
870	}
871	};
872
873	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
874	};
875
876	# now handle proxy-CONNECT method
877	if ($proxy && $uscheme eq "https") {
878	# oh dear, we have to wrap it into a connect request
879
880	# maybe re-use $uauthority with patched port?
881	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
882	$state{handle}->push_read (line => $qr_nlnl, sub {
883	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
884	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
885
886	if ($2 == 200) {
887	$rpath = $upath;
888	&$handle_actual_request;	1243	$handle_actual_request->();
889	} else {	1244
890	%state = ();
891	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
892	}
893	});
894	} else {	1245	} else {
895	&$handle_actual_request;
896	}
897	};
898
899	my $tcp_connect = $arg{tcp_connect}	1246	my $tcp_connect = $arg{tcp_connect}
900	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };	1247	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
901		1248
902	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });	1249	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
903		1250	}
904	};	1251	};
905		1252
906	defined wantarray && AnyEvent::Util::guard { %state = () }	1253	defined wantarray && AnyEvent::Util::guard { _destroy_state %state }
907	}	1254	}
908		1255
909	sub http_get($@) {	1256	sub http_get($@) {
910	unshift @_, "GET";	1257	unshift @_, "GET";
911	&http_request	1258	&http_request
…		…
929	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for	1276	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
930	the actual connection, which in turn uses AnyEvent::DNS to resolve	1277	the actual connection, which in turn uses AnyEvent::DNS to resolve
931	hostnames. The latter is a simple stub resolver and does no caching	1278	hostnames. The latter is a simple stub resolver and does no caching
932	on its own. If you want DNS caching, you currently have to provide	1279	on its own. If you want DNS caching, you currently have to provide
933	your own default resolver (by storing a suitable resolver object in	1280	your own default resolver (by storing a suitable resolver object in
934	C<$AnyEvent::DNS::RESOLVER>).	1281	C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback.
935		1282
936	=head2 GLOBAL FUNCTIONS AND VARIABLES	1283	=head2 GLOBAL FUNCTIONS AND VARIABLES
937		1284
938	=over 4	1285	=over 4
939		1286
940	=item AnyEvent::HTTP::set_proxy "proxy-url"	1287	=item AnyEvent::HTTP::set_proxy "proxy-url"
941		1288
942	Sets the default proxy server to use. The proxy-url must begin with a	1289	Sets the default proxy server to use. The proxy-url must begin with a
943	string of the form C<http://host:port> (optionally C<https:...>), croaks	1290	string of the form C<http://host:port>, croaks otherwise.
944	otherwise.
945		1291
946	To clear an already-set proxy, use C<undef>.	1292	To clear an already-set proxy, use C<undef>.
		1293
		1294	When AnyEvent::HTTP is loaded for the first time it will query the
		1295	default proxy from the operating system, currently by looking at
		1296	C<$ENV{http_proxy>}.
		1297
		1298	=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end]
		1299
		1300	Remove all cookies from the cookie jar that have been expired. If
		1301	C<$session_end> is given and true, then additionally remove all session
		1302	cookies.
		1303
		1304	You should call this function (with a true C<$session_end>) before you
		1305	save cookies to disk, and you should call this function after loading them
		1306	again. If you have a long-running program you can additionally call this
		1307	function from time to time.
		1308
		1309	A cookie jar is initially an empty hash-reference that is managed by this
		1310	module. Its format is subject to change, but currently it is as follows:
		1311
		1312	The key C<version> has to contain C<2>, otherwise the hash gets
		1313	cleared. All other keys are hostnames or IP addresses pointing to
		1314	hash-references. The key for these inner hash references is the
		1315	server path for which this cookie is meant, and the values are again
		1316	hash-references. Each key of those hash-references is a cookie name, and
		1317	the value, you guessed it, is another hash-reference, this time with the
		1318	key-value pairs from the cookie, except for C<expires> and C<max-age>,
		1319	which have been replaced by a C<_expires> key that contains the cookie
		1320	expiry timestamp. Session cookies are indicated by not having an
		1321	C<_expires> key.
		1322
		1323	Here is an example of a cookie jar with a single cookie, so you have a
		1324	chance of understanding the above paragraph:
		1325
		1326	{
		1327	version => 2,
		1328	"10.0.0.1" => {
		1329	"/" => {
		1330	"mythweb_id" => {
		1331	_expires => 1293917923,
		1332	value => "ooRung9dThee3ooyXooM1Ohm",
		1333	},
		1334	},
		1335	},
		1336	}
947		1337
948	=item $date = AnyEvent::HTTP::format_date $timestamp	1338	=item $date = AnyEvent::HTTP::format_date $timestamp
949		1339
950	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP	1340	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
951	Date (RFC 2616).	1341	Date (RFC 2616).
952		1342
953	=item $timestamp = AnyEvent::HTTP::parse_date $date	1343	=item $timestamp = AnyEvent::HTTP::parse_date $date
954		1344
955	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) and	1345	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a
956	returns the corresponding POSIX timestamp, or C<undef> if the date cannot	1346	bunch of minor variations of those, and returns the corresponding POSIX
957	be parsed.	1347	timestamp, or C<undef> if the date cannot be parsed.
958		1348
959	=item $AnyEvent::HTTP::MAX_RECURSE	1349	=item $AnyEvent::HTTP::MAX_RECURSE
960		1350
961	The default value for the C<recurse> request parameter (default: C<10>).	1351	The default value for the C<recurse> request parameter (default: C<10>).
		1352
		1353	=item $AnyEvent::HTTP::TIMEOUT
		1354
		1355	The default timeout for connection operations (default: C<300>).
962		1356
963	=item $AnyEvent::HTTP::USERAGENT	1357	=item $AnyEvent::HTTP::USERAGENT
964		1358
965	The default value for the C<User-Agent> header (the default is	1359	The default value for the C<User-Agent> header (the default is
966	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	1360	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
967		1361
968	=item $AnyEvent::HTTP::MAX_PER_HOST	1362	=item $AnyEvent::HTTP::MAX_PER_HOST
969		1363
970	The maximum number of concurrent connections to the same host (identified	1364	The maximum number of concurrent connections to the same host (identified
971	by the hostname). If the limit is exceeded, then the additional requests	1365	by the hostname). If the limit is exceeded, then additional requests
972	are queued until previous connections are closed.	1366	are queued until previous connections are closed. Both persistent and
		1367	non-persistent connections are counted in this limit.
973		1368
974	The default value for this is C<4>, and it is highly advisable to not	1369	The default value for this is C<4>, and it is highly advisable to not
975	increase it.	1370	increase it much.
		1371
		1372	For comparison: the RFC's recommend 4 non-persistent or 2 persistent
		1373	connections, older browsers used 2, newer ones (such as firefox 3)
		1374	typically use 6, and Opera uses 8 because like, they have the fastest
		1375	browser and give a shit for everybody else on the planet.
		1376
		1377	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
		1378
		1379	The time after which idle persistent connections get closed by
		1380	AnyEvent::HTTP (default: C<3>).
976		1381
977	=item $AnyEvent::HTTP::ACTIVE	1382	=item $AnyEvent::HTTP::ACTIVE
978		1383
979	The number of active connections. This is not the number of currently	1384	The number of active connections. This is not the number of currently
980	running requests, but the number of currently open and non-idle TCP	1385	running requests, but the number of currently open and non-idle TCP
981	connections. This number of can be useful for load-leveling.	1386	connections. This number can be useful for load-leveling.
982		1387
983	=back	1388	=back
984		1389
985	=cut	1390	=cut
986		1391
…		…
1001	sub parse_date($) {	1406	sub parse_date($) {
1002	my ($date) = @_;	1407	my ($date) = @_;
1003		1408
1004	my ($d, $m, $y, $H, $M, $S);	1409	my ($d, $m, $y, $H, $M, $S);
1005		1410
1006	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$/) {	1411	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$/) {
1007	# RFC 822/1123, required by RFC 2616 (with " ")	1412	# RFC 822/1123, required by RFC 2616 (with " ")
1008	# cookie dates (with "-")	1413	# cookie dates (with "-")
1009		1414
1010	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);	1415	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
1011		1416
1012	} 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$/) {	1417	} 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$/) {
1013	# RFC 850	1418	# RFC 850
1014	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);	1419	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
1015		1420
1016	} 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])$/) {	1421	} 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])$/) {
1017	# ISO C's asctime	1422	# ISO C's asctime
1018	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);	1423	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
1019	}	1424	}
1020	# other formats fail in the loop below	1425	# other formats fail in the loop below
1021		1426
1022	for (0..11) {	1427	for (0..11) {
1023	if ($m eq $month[$_]) {	1428	if ($m eq $month[$_]) {
1024	require Time::Local;	1429	require Time::Local;
1025	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);	1430	return eval { Time::Local::timegm ($S, $M, $H, $d, $_, $y) };
1026	}	1431	}
1027	}	1432	}
1028		1433
1029	undef	1434	undef
1030	}	1435	}
1031		1436
1032	sub set_proxy($) {	1437	sub set_proxy($) {
1033	if (length $_[0]) {	1438	if (length $_[0]) {
1034	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	1439	$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix
1035	or Carp::croak "$_[0]: invalid proxy URL";	1440	or Carp::croak "$_[0]: invalid proxy URL";
1036	$PROXY = [$2, $3 \|\| 3128, $1]	1441	$PROXY = [$2, $3 \|\| 3128, $1]
1037	} else {	1442	} else {
1038	undef $PROXY;	1443	undef $PROXY;
1039	}	1444	}
…		…
1042	# initialise proxy from environment	1447	# initialise proxy from environment
1043	eval {	1448	eval {
1044	set_proxy $ENV{http_proxy};	1449	set_proxy $ENV{http_proxy};
1045	};	1450	};
1046		1451
		1452	=head2 SHOWCASE
		1453
		1454	This section contains some more elaborate "real-world" examples or code
		1455	snippets.
		1456
		1457	=head2 HTTP/1.1 FILE DOWNLOAD
		1458
		1459	Downloading files with HTTP can be quite tricky, especially when something
		1460	goes wrong and you want to resume.
		1461
		1462	Here is a function that initiates and resumes a download. It uses the
		1463	last modified time to check for file content changes, and works with many
		1464	HTTP/1.0 servers as well, and usually falls back to a complete re-download
		1465	on older servers.
		1466
		1467	It calls the completion callback with either C<undef>, which means a
		1468	nonretryable error occurred, C<0> when the download was partial and should
		1469	be retried, and C<1> if it was successful.
		1470
		1471	use AnyEvent::HTTP;
		1472
		1473	sub download($$$) {
		1474	my ($url, $file, $cb) = @_;
		1475
		1476	open my $fh, "+<", $file
		1477	or die "$file: $!";
		1478
		1479	my %hdr;
		1480	my $ofs = 0;
		1481
		1482	if (stat $fh and -s _) {
		1483	$ofs = -s _;
		1484	warn "-s is ", $ofs;
		1485	$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9];
		1486	$hdr{"range"} = "bytes=$ofs-";
		1487	}
		1488
		1489	http_get $url,
		1490	headers => \%hdr,
		1491	on_header => sub {
		1492	my ($hdr) = @_;
		1493
		1494	if ($hdr->{Status} == 200 && $ofs) {
		1495	# resume failed
		1496	truncate $fh, $ofs = 0;
		1497	}
		1498
		1499	sysseek $fh, $ofs, 0;
		1500
		1501	1
		1502	},
		1503	on_body => sub {
		1504	my ($data, $hdr) = @_;
		1505
		1506	if ($hdr->{Status} =~ /^2/) {
		1507	length $data == syswrite $fh, $data
		1508	or return; # abort on write errors
		1509	}
		1510
		1511	1
		1512	},
		1513	sub {
		1514	my (undef, $hdr) = @_;
		1515
		1516	my $status = $hdr->{Status};
		1517
		1518	if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) {
		1519	utime $time, $time, $fh;
		1520	}
		1521
		1522	if ($status == 200 \|\| $status == 206 \|\| $status == 416) {
		1523	# download ok \|\| resume ok \|\| file already fully downloaded
		1524	$cb->(1, $hdr);
		1525
		1526	} elsif ($status == 412) {
		1527	# file has changed while resuming, delete and retry
		1528	unlink $file;
		1529	$cb->(0, $hdr);
		1530
		1531	} elsif ($status == 500 or $status == 503 or $status =~ /^59/) {
		1532	# retry later
		1533	$cb->(0, $hdr);
		1534
		1535	} else {
		1536	$cb->(undef, $hdr);
		1537	}
		1538	}
		1539	;
		1540	}
		1541
		1542	download "http://server/somelargefile", "/tmp/somelargefile", sub {
		1543	if ($_[0]) {
		1544	print "OK!\n";
		1545	} elsif (defined $_[0]) {
		1546	print "please retry later\n";
		1547	} else {
		1548	print "ERROR\n";
		1549	}
		1550	};
		1551
1047	=head2 SOCKS PROXIES	1552	=head3 SOCKS PROXIES
1048		1553
1049	Socks proxies are not directly supported by AnyEvent::HTTP. You can	1554	Socks proxies are not directly supported by AnyEvent::HTTP. You can
1050	compile your perl to support socks, or use an external program such as	1555	compile your perl to support socks, or use an external program such as
1051	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy	1556	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
1052	transparently.	1557	transparently.

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.73 by root, Fri Dec 31 21:00:36 2010 UTC vs. Revision 1.136 by root, Wed Oct 16 01:20:02 2019 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.73 by root, Fri Dec 31 21:00:36 2010 UTC vs.
Revision 1.136 by root, Wed Oct 16 01:20:02 2019 UTC