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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.12 by root, Thu Jun 5 16:33:02 2008 UTC vs.
Revision 1.66 by root, Fri Dec 31 06:18:30 2010 UTC

…		…
3	AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client	3	AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client
4		4
5	=head1 SYNOPSIS	5	=head1 SYNOPSIS
6		6
7	use AnyEvent::HTTP;	7	use AnyEvent::HTTP;
		8
		9	http_get "http://www.nethype.de/", sub { print $_[1] };
		10
		11	# ... do something else here
8		12
9	=head1 DESCRIPTION	13	=head1 DESCRIPTION
10		14
11	This module is an L<AnyEvent> user, you need to make sure that you use and	15	This module is an L<AnyEvent> user, you need to make sure that you use and
12	run a supported event loop.	16	run a supported event loop.
…		…
35	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
36		40
37	use strict;	41	use strict;
38	no warnings;	42	no warnings;
39		43
40	use Carp;	44	use Errno ();
41		45
42	use AnyEvent ();	46	use AnyEvent 5.0 ();
43	use AnyEvent::Util ();	47	use AnyEvent::Util ();
44	use AnyEvent::Socket ();
45	use AnyEvent::Handle ();	48	use AnyEvent::Handle ();
46		49
47	use base Exporter::;	50	use base Exporter::;
48		51
49	our $VERSION = '1.0';	52	our $VERSION = '1.5';
50		53
51	our @EXPORT = qw(http_get http_request);	54	our @EXPORT = qw(http_get http_post http_head http_request);
52		55
53	our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	56	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
54	our $MAX_RECURSE = 10;	57	our $MAX_RECURSE = 10;
55	our $MAX_PERSISTENT = 8;	58	our $MAX_PERSISTENT = 8;
56	our $PERSISTENT_TIMEOUT = 2;	59	our $PERSISTENT_TIMEOUT = 2;
57	our $TIMEOUT = 300;	60	our $TIMEOUT = 300;
58		61
59	# changing these is evil	62	# changing these is evil
60	our $MAX_PERSISTENT_PER_HOST = 2;	63	our $MAX_PERSISTENT_PER_HOST = 0;
61	our $MAX_PER_HOST = 4;	64	our $MAX_PER_HOST = 4;
62		65
63	our $PROXY;	66	our $PROXY;
		67	our $ACTIVE = 0;
64		68
65	my %KA_COUNT; # number of open keep-alive connections per host	69	my %KA_COUNT; # number of open keep-alive connections per host
66	my %CO_SLOT; # number of open connections, and wait queue, per host	70	my %CO_SLOT; # number of open connections, and wait queue, per host
67		71
68	=item http_get $url, key => value..., $cb->($data, $headers)	72	=item http_get $url, key => value..., $cb->($data, $headers)
69		73
70	Executes an HTTP-GET request. See the http_request function for details on	74	Executes an HTTP-GET request. See the http_request function for details on
71	additional parameters.	75	additional parameters and the return value.
72		76
73	=item http_head $url, key => value..., $cb->($data, $headers)	77	=item http_head $url, key => value..., $cb->($data, $headers)
74		78
75	Executes an HTTP-HEAD request. See the http_request function for details on	79	Executes an HTTP-HEAD request. See the http_request function for details
76	additional parameters.	80	on additional parameters and the return value.
77		81
78	=item http_post $url, $body, key => value..., $cb->($data, $headers)	82	=item http_post $url, $body, key => value..., $cb->($data, $headers)
79		83
80	Executes an HTTP-POST request with a request body of C<$bod>. See the	84	Executes an HTTP-POST request with a request body of C<$body>. See the
81	http_request function for details on additional parameters.	85	http_request function for details on additional parameters and the return
		86	value.
82		87
83	=item http_request $method => $url, key => value..., $cb->($data, $headers)	88	=item http_request $method => $url, key => value..., $cb->($data, $headers)
84		89
85	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL	90	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
86	must be an absolute http or https URL.	91	must be an absolute http or https URL.
87		92
		93	When called in void context, nothing is returned. In other contexts,
		94	C<http_request> returns a "cancellation guard" - you have to keep the
		95	object at least alive until the callback get called. If the object gets
		96	destroyed before the callback is called, the request will be cancelled.
		97
88	The callback will be called with the response data as first argument	98	The callback will be called with the response body data as first argument
89	(or C<undef> if it wasn't available due to errors), and a hash-ref with	99	(or C<undef> if an error occured), and a hash-ref with response headers as
90	response headers as second argument.	100	second argument.
91		101
92	All the headers in that hash are lowercased. In addition to the response	102	All the headers in that hash are lowercased. In addition to the response
93	headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and	103	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
94	C<Reason> contain the three parts of the HTTP Status-Line of the same	104	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
		105	three parts of the HTTP Status-Line of the same name. If an error occurs
		106	during the body phase of a request, then the original C<Status> and
		107	C<Reason> values from the header are available as C<OrigStatus> and
		108	C<OrigReason>.
		109
		110	The pseudo-header C<URL> contains the actual URL (which can differ from
		111	the requested URL when following redirects - for example, you might get
		112	an error that your URL scheme is not supported even though your URL is a
		113	valid http URL because it redirected to an ftp URL, in which case you can
		114	look at the URL pseudo header).
		115
		116	The pseudo-header C<Redirect> only exists when the request was a result
		117	of an internal redirect. In that case it is an array reference with
		118	the C<($data, $headers)> from the redirect response. Note that this
		119	response could in turn be the result of a redirect itself, and C<<
		120	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		121	response, and so on.
		122
95	name. If the server sends a header multiple lines, then their contents	123	If the server sends a header multiple times, then their contents will be
96	will be joined together with C<\x00>.	124	joined together with a comma (C<,>), as per the HTTP spec.
97		125
98	If an internal error occurs, such as not being able to resolve a hostname,	126	If an internal error occurs, such as not being able to resolve a hostname,
99	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	127	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
100	and the C<Reason> pseudo-header will contain an error message.	128	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		129	message.
101		130
102	A typical callback might look like this:	131	A typical callback might look like this:
103		132
104	sub {	133	sub {
105	my ($body, $hdr) = @_;	134	my ($body, $hdr) = @_;
…		…
123		152
124	=item headers => hashref	153	=item headers => hashref
125		154
126	The request headers to use. Currently, C<http_request> may provide its	155	The request headers to use. Currently, C<http_request> may provide its
127	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers	156	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
128	and will provide defaults for C<User-Agent:> and C<Referer:>.	157	and will provide defaults for C<User-Agent:> and C<Referer:> (this can be
		158	suppressed by using C<undef> for these headers in which case they won't be
		159	sent at all).
129		160
130	=item timeout => $seconds	161	=item timeout => $seconds
131		162
132	The time-out to use for various stages - each connect attempt will reset	163	The time-out to use for various stages - each connect attempt will reset
133	the timeout, as will read or write activity. Default timeout is 5 minutes.	164	the timeout, as will read or write activity, i.e. this is not an overall
		165	timeout.
		166
		167	Default timeout is 5 minutes.
134		168
135	=item proxy => [$host, $port[, $scheme]] or undef	169	=item proxy => [$host, $port[, $scheme]] or undef
136		170
137	Use the given http proxy for all requests. If not specified, then the	171	Use the given http proxy for all requests. If not specified, then the
138	default proxy (as specified by C<$ENV{http_proxy}>) is used.	172	default proxy (as specified by C<$ENV{http_proxy}>) is used.
139		173
140	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	174	C<$scheme> must be either missing, C<http> for HTTP or C<https> for
141	HTTPS.	175	HTTPS.
142		176
143	=item body => $string	177	=item body => $string
144		178
145	The request body, usually empty. Will be-sent as-is (future versions of	179	The request body, usually empty. Will be-sent as-is (future versions of
…		…
151	based on the original netscape specification.	185	based on the original netscape specification.
152		186
153	The C<$hash_ref> must be an (initially empty) hash reference which will	187	The C<$hash_ref> must be an (initially empty) hash reference which will
154	get updated automatically. It is possible to save the cookie_jar to	188	get updated automatically. It is possible to save the cookie_jar to
155	persistent storage with something like JSON or Storable, but this is not	189	persistent storage with something like JSON or Storable, but this is not
156	recommended, as expire times are currently being ignored.	190	recommended, as expiry times are currently being ignored.
157		191
158	Note that this cookie implementation is not of very high quality, nor	192	Note that this cookie implementation is not of very high quality, nor
159	meant to be complete. If you want complete cookie management you have to	193	meant to be complete. If you want complete cookie management you have to
160	do that on your own. C<cookie_jar> is meant as a quick fix to get some	194	do that on your own. C<cookie_jar> is meant as a quick fix to get some
161	cookie-using sites working. Cookies are a privacy disaster, do not use	195	cookie-using sites working. Cookies are a privacy disaster, do not use
162	them unless required to.	196	them unless required to.
		197
		198	=item tls_ctx => $scheme \| $tls_ctx
		199
		200	Specifies the AnyEvent::TLS context to be used for https connections. This
		201	parameter follows the same rules as the C<tls_ctx> parameter to
		202	L<AnyEvent::Handle>, but additionally, the two strings C<low> or
		203	C<high> can be specified, which give you a predefined low-security (no
		204	verification, highest compatibility) and high-security (CA and common-name
		205	verification) TLS context.
		206
		207	The default for this option is C<low>, which could be interpreted as "give
		208	me the page, no matter what".
		209
		210	=item on_prepare => $callback->($fh)
		211
		212	In rare cases you need to "tune" the socket before it is used to
		213	connect (for exmaple, to bind it on a given IP address). This parameter
		214	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		215	and behaves exactly the same way (e.g. it has to provide a
		216	timeout). See the description for the C<$prepare_cb> argument of
		217	C<AnyEvent::Socket::tcp_connect> for details.
		218
		219	=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
		220
		221	In even rarer cases you want total control over how AnyEvent::HTTP
		222	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
		223	to do this, but you can provide your own C<tcp_connect> function -
		224	obviously, it has to follow the same calling conventions, except that it
		225	may always return a connection guard object.
		226
		227	There are probably lots of weird uses for this function, starting from
		228	tracing the hosts C<http_request> actually tries to connect, to (inexact
		229	but fast) host => IP address caching or even socks protocol support.
		230
		231	=item on_header => $callback->($headers)
		232
		233	When specified, this callback will be called with the header hash as soon
		234	as headers have been successfully received from the remote server (not on
		235	locally-generated errors).
		236
		237	It has to return either true (in which case AnyEvent::HTTP will continue),
		238	or false, in which case AnyEvent::HTTP will cancel the download (and call
		239	the finish callback with an error code of C<598>).
		240
		241	This callback is useful, among other things, to quickly reject unwanted
		242	content, which, if it is supposed to be rare, can be faster than first
		243	doing a C<HEAD> request.
		244
		245	Example: cancel the request unless the content-type is "text/html".
		246
		247	on_header => sub {
		248	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		249	},
		250
		251	=item on_body => $callback->($partial_body, $headers)
		252
		253	When specified, all body data will be passed to this callback instead of
		254	to the completion callback. The completion callback will get the empty
		255	string instead of the body data.
		256
		257	It has to return either true (in which case AnyEvent::HTTP will continue),
		258	or false, in which case AnyEvent::HTTP will cancel the download (and call
		259	the completion callback with an error code of C<598>).
		260
		261	This callback is useful when the data is too large to be held in memory
		262	(so the callback writes it to a file) or when only some information should
		263	be extracted, or when the body should be processed incrementally.
		264
		265	It is usually preferred over doing your own body handling via
		266	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		267	only used to create a connection, C<want_body_handle> is the better
		268	alternative, as it allows you to install your own event handler, reducing
		269	resource usage.
		270
		271	=item want_body_handle => $enable
		272
		273	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		274	changes considerably: after parsing the headers, and instead of
		275	downloading the body (if any), the completion callback will be
		276	called. Instead of the C<$body> argument containing the body data, the
		277	callback will receive the L<AnyEvent::Handle> object associated with the
		278	connection. In error cases, C<undef> will be passed. When there is no body
		279	(e.g. status C<304>), the empty string will be passed.
		280
		281	The handle object might or might not be in TLS mode, might be connected to
		282	a proxy, be a persistent connection etc., and configured in unspecified
		283	ways. The user is responsible for this handle (it will not be used by this
		284	module anymore).
		285
		286	This is useful with some push-type services, where, after the initial
		287	headers, an interactive protocol is used (typical example would be the
		288	push-style twitter API which starts a JSON/XML stream).
		289
		290	If you think you need this, first have a look at C<on_body>, to see if
		291	that doesn't solve your problem in a better way.
163		292
164	=back	293	=back
165		294
166	Example: make a simple HTTP GET request for http://www.nethype.de/	295	Example: make a simple HTTP GET request for http://www.nethype.de/
167		296
…		…
181	use Data::Dumper;	310	use Data::Dumper;
182	print Dumper $hdr;	311	print Dumper $hdr;
183	}	312	}
184	;	313	;
185		314
		315	Example: make another simple HTTP GET request, but immediately try to
		316	cancel it.
		317
		318	my $request = http_request GET => "http://www.nethype.de/", sub {
		319	my ($body, $hdr) = @_;
		320	print "$body\n";
		321	};
		322
		323	undef $request;
		324
186	=cut	325	=cut
187		326
188	sub _slot_schedule;	327	sub _slot_schedule;
189	sub _slot_schedule($) {	328	sub _slot_schedule($) {
190	my $host = shift;	329	my $host = shift;
191		330
192	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {	331	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
193	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {	332	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
194	# somebody wants that slot	333	# somebody wants that slot
195	++$CO_SLOT{$host}[0];	334	++$CO_SLOT{$host}[0];
		335	++$ACTIVE;
196		336
197	$cb->(AnyEvent::Util::guard {	337	$cb->(AnyEvent::Util::guard {
		338	--$ACTIVE;
198	--$CO_SLOT{$host}[0];	339	--$CO_SLOT{$host}[0];
199	_slot_schedule $host;	340	_slot_schedule $host;
200	});	341	});
201	} else {	342	} else {
202	# nobody wants the slot, maybe we can forget about it	343	# nobody wants the slot, maybe we can forget about it
…		…
211	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	352	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
212		353
213	_slot_schedule $_[0];	354	_slot_schedule $_[0];
214	}	355	}
215		356
		357	# continue to parse $_ for headers and place them into the arg
		358	sub parse_hdr() {
		359	my %hdr;
		360
		361	# things seen, not parsed:
		362	# p3pP="NON CUR OTPi OUR NOR UNI"
		363
		364	$hdr{lc $1} .= ",$2"
		365	while /\G
		366	([^:\000-\037]*):
		367	[\011\040]*
		368	((?: [^\012]+ \| \012[\011\040] )*)
		369	\012
		370	/gxc;
		371
		372	/\G$/
		373	or return;
		374
		375	# remove the "," prefix we added to all headers above
		376	substr $_, 0, 1, ""
		377	for values %hdr;
		378
		379	\%hdr
		380	}
		381
		382	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		383
		384	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		385	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		386
216	sub http_request($$$;@) {	387	sub http_request($$@) {
217	my $cb = pop;	388	my $cb = pop;
218	my ($method, $url, %arg) = @_;	389	my ($method, $url, %arg) = @_;
219		390
220	my %hdr;	391	my %hdr;
		392
		393	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		394	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
221		395
222	$method = uc $method;	396	$method = uc $method;
223		397
224	if (my $hdr = $arg{headers}) {	398	if (my $hdr = $arg{headers}) {
225	while (my ($k, $v) = each %$hdr) {	399	while (my ($k, $v) = each %$hdr) {
226	$hdr{lc $k} = $v;	400	$hdr{lc $k} = $v;
227	}	401	}
228	}	402	}
229		403
		404	# pseudo headers for all subsequent responses
		405	my @pseudo = (URL => $url);
		406	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		407
230	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;	408	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
231		409
232	return $cb->(undef, { Status => 599, Reason => "recursion limit reached" })	410	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
233	if $recurse < 0;	411	if $recurse < 0;
234		412
235	my $proxy = $arg{proxy} \|\| $PROXY;	413	my $proxy = $arg{proxy} \|\| $PROXY;
236	my $timeout = $arg{timeout} \|\| $TIMEOUT;	414	my $timeout = $arg{timeout} \|\| $TIMEOUT;
237		415
238	$hdr{"user-agent"} \|\|= $USERAGENT;
239
240	my ($scheme, $authority, $upath, $query, $fragment) =	416	my ($uscheme, $uauthority, $upath, $query, $fragment) =
241	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	417	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
242		418
243	$scheme = lc $scheme;	419	$uscheme = lc $uscheme;
244		420
245	my $uport = $scheme eq "http" ? 80	421	my $uport = $uscheme eq "http" ? 80
246	: $scheme eq "https" ? 443	422	: $uscheme eq "https" ? 443
247	: return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported" });	423	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
248		424
249	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	425	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
250	or return $cb->(undef, { Status => 599, Reason => "unparsable URL" });	426	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
251		427
252	my $uhost = $1;	428	my $uhost = $1;
253	$uport = $2 if defined $2;	429	$uport = $2 if defined $2;
254		430
		431	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		432	unless exists $hdr{host};
		433
255	$uhost =~ s/^\[(.*)\]$/$1/;	434	$uhost =~ s/^\[(.*)\]$/$1/;
256	$upath .= "?$query" if length $query;	435	$upath .= $query if length $query;
257		436
258	$upath =~ s%^/?%/%;	437	$upath =~ s%^/?%/%;
259
260	$hdr{referer} \|\|= "$scheme://$authority$upath";
261		438
262	# cookie processing	439	# cookie processing
263	if (my $jar = $arg{cookie_jar}) {	440	if (my $jar = $arg{cookie_jar}) {
264	%$jar = () if $jar->{version} < 1;	441	%$jar = () if $jar->{version} != 1;
265		442
266	my @cookie;	443	my @cookie;
267		444
268	while (my ($chost, $v) = each %$jar) {	445	while (my ($chost, $v) = each %$jar) {
		446	if ($chost =~ /^\./) {
269	next unless $chost eq substr $uhost, -length $chost;	447	next unless $chost eq substr $uhost, -length $chost;
270	next unless $chost =~ /^\./;	448	} elsif ($chost =~ /\./) {
		449	next unless $chost eq $uhost;
		450	} else {
		451	next;
		452	}
271		453
272	while (my ($cpath, $v) = each %$v) {	454	while (my ($cpath, $v) = each %$v) {
273	next unless $cpath eq substr $upath, 0, length $cpath;	455	next unless $cpath eq substr $upath, 0, length $cpath;
274		456
275	while (my ($k, $v) = each %$v) {	457	while (my ($k, $v) = each %$v) {
276	next if $scheme ne "https" && exists $v->{secure};	458	next if $uscheme ne "https" && exists $v->{secure};
		459	my $value = $v->{value};
		460	$value =~ s/([\\"])/\\$1/g;
277	push @cookie, "$k=$v->{value}";	461	push @cookie, "$k=\"$value\"";
278	}	462	}
279	}	463	}
280	}	464	}
281		465
282	$hdr{cookie} = join "; ", @cookie	466	$hdr{cookie} = join "; ", @cookie
283	if @cookie;	467	if @cookie;
284	}	468	}
285		469
286	my ($rhost, $rport, $rpath); # request host, port, path	470	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
287		471
288	if ($proxy) {	472	if ($proxy) {
289	($rhost, $rport, $scheme) = @$proxy;	473	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
290	$rpath = $url;	474
		475	$rscheme = "http" unless defined $rscheme;
		476
		477	# don't support https requests over https-proxy transport,
		478	# can't be done with tls as spec'ed, unless you double-encrypt.
		479	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
291	} else {	480	} else {
292	($rhost, $rport, $rpath) = ($uhost, $uport, $upath);	481	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
293	$hdr{host} = $uhost;
294	}	482	}
295		483
		484	# leave out fragment and query string, just a heuristic
		485	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		486	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
		487
296	$hdr{"content-length"} = length $arg{body};	488	$hdr{"content-length"} = length $arg{body}
		489	if length $arg{body} \|\| $method ne "GET";
		490
		491	$hdr{connection} = "close TE";
		492	$hdr{te} = "trailers" unless exists $hdr{te};
297		493
298	my %state = (connect_guard => 1);	494	my %state = (connect_guard => 1);
299		495
300	_get_slot $uhost, sub {	496	_get_slot $uhost, sub {
301	$state{slot_guard} = shift;	497	$state{slot_guard} = shift;
302		498
303	return unless $state{connect_guard};	499	return unless $state{connect_guard};
304		500
305	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	501	my $connect_cb = sub {
306	$state{fh} = shift	502	$state{fh} = shift
		503	or do {
		504	my $err = "$!";
		505	%state = ();
307	or return $cb->(undef, { Status => 599, Reason => "$!" });	506	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
		507	};
308		508
309	delete $state{connect_guard}; # reduce memory usage, save a tree	509	pop; # free memory, save a tree
		510
		511	return unless delete $state{connect_guard};
310		512
311	# get handle	513	# get handle
312	$state{handle} = new AnyEvent::Handle	514	$state{handle} = new AnyEvent::Handle
313	fh => $state{fh},	515	fh => $state{fh},
314	($scheme eq "https" ? (tls => "connect") : ());	516	peername => $rhost,
		517	tls_ctx => $arg{tls_ctx},
		518	# these need to be reconfigured on keepalive handles
		519	timeout => $timeout,
		520	on_error => sub {
		521	%state = ();
		522	$cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
		523	},
		524	on_eof => sub {
		525	%state = ();
		526	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
		527	},
		528	;
315		529
316	# limit the number of persistent connections	530	# limit the number of persistent connections
		531	# keepalive not yet supported
317	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	532	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
318	++$KA_COUNT{$_[1]};	533	# ++$KA_COUNT{$_[1]};
319	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	534	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		535	# --$KA_COUNT{$_[1]}
		536	# };
320	$hdr{connection} = "keep-alive";	537	# $hdr{connection} = "keep-alive";
321	delete $hdr{connection}; # keep-alive not yet supported
322	} else {	538	# } else {
323	delete $hdr{connection};	539	# delete $hdr{connection};
324	}	540	# }
325		541
326	# (re-)configure handle	542	$state{handle}->starttls ("connect") if $rscheme eq "https";
327	$state{handle}->timeout ($timeout);
328	$state{handle}->on_error (sub {
329	%state = ();
330	$cb->(undef, { Status => 599, Reason => "$!" });
331	});
332	$state{handle}->on_eof (sub {
333	%state = ();
334	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
335	});
336		543
		544	# handle actual, non-tunneled, request
		545	my $handle_actual_request = sub {
		546	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		547
337	# send request	548	# send request
338	$state{handle}->push_write (	549	$state{handle}->push_write (
339	"$method $rpath HTTP/1.0\015\012"	550	"$method $rpath HTTP/1.1\015\012"
340	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)	551	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
341	. "\015\012"	552	. "\015\012"
342	. (delete $arg{body})	553	. (delete $arg{body})
343	);
344
345	%hdr = (); # reduce memory usage, save a kitten
346
347	# status line
348	$state{handle}->push_read (line => qr/\015?\012/, sub {
349	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
350	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
351
352	my %hdr = ( # response headers
353	HTTPVersion => "\x00$1",
354	Status => "\x00$2",
355	Reason => "\x00$3",
356	);	554	);
357		555
358	# headers, could be optimized a bit	556	# return if error occured during push_write()
		557	return unless %state;
		558
		559	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
		560
		561	# status line and headers
359	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {	562	$state{handle}->push_read (line => $qr_nlnl, sub {
		563	my $keepalive = pop;
		564
360	for ("$_[1]\012") {	565	for ("$_[1]") {
361	# we support spaces in field names, as lotus domino	566	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
362	# creates them.
363	$hdr{lc $1} .= "\x00$2"
364	while /\G
365	([^:\000-\037]+):
366	[\011\040]*
367	((?: [^\015\012]+ \| \015?\012[\011\040] )*)
368	\015?\012
369	/gxc;
370		567
		568	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc
		569	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
		570
		571	push @pseudo,
		572	HTTPVersion => $1,
		573	Status => $2,
		574	Reason => $3,
371	/\G$/	575	;
		576
		577	my $hdr = parse_hdr
372	or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers" }));	578	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
		579
		580	%hdr = (%$hdr, @pseudo);
373	}	581	}
374		582
375	substr $_, 0, 1, ""	583	# redirect handling
376	for values %hdr;	584	# microsoft and other shitheads don't give a shit for following standards,
		585	# try to support some common forms of broken Location headers.
		586	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		587	$hdr{location} =~ s/^\.\/+//;
377		588
378	my $finish = sub {	589	my $url = "$rscheme://$uhost:$uport";
		590
		591	unless ($hdr{location} =~ s/^\///) {
		592	$url .= $upath;
		593	$url =~ s/\/[^\/]*$//;
		594	}
		595
		596	$hdr{location} = "$url/$hdr{location}";
		597	}
		598
		599	my $redirect;
		600
		601	if ($recurse) {
		602	my $status = $hdr{Status};
		603
		604	# industry standard is to redirect POST as GET for
		605	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
		606	# also, the UA should ask the user for 301 and 307 and POST,
		607	# industry standard seems to be to simply follow.
		608	# we go with the industry standard.
		609	if ($status == 301 or $status == 302 or $status == 303) {
		610	# HTTP/1.1 is unclear on how to mutate the method
		611	$method = "GET" unless $method eq "HEAD";
		612	$redirect = 1;
		613	} elsif ($status == 307) {
		614	$redirect = 1;
		615	}
		616	}
		617
		618	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
		619	$state{handle}->destroy if $state{handle};
379	%state = ();	620	%state = ();
380		621
		622	if (defined $_[1]) {
		623	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		624	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		625	}
		626
381	# set-cookie processing	627	# set-cookie processing
382	if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {	628	if ($arg{cookie_jar}) {
383	for (split /\x00/, $hdr{"set-cookie"}) {	629	for ($hdr{"set-cookie"}) {
384	my ($cookie, @arg) = split /;\s*/;	630	# parse NAME=VALUE
385	my ($name, $value) = split /=/, $cookie, 2;	631	my @kv;
386	my %kv = (value => $value, map { split /=/, $_, 2 } @arg);	632
		633	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
		634	my $name = $1;
		635	my $value = $3;
		636
		637	unless ($value) {
		638	$value = $2;
		639	$value =~ s/\\(.)/$1/gs;
		640	}
		641
		642	push @kv, $name => $value;
		643
		644	last unless /\G\s*;/gc;
		645	}
		646
		647	last unless @kv;
		648
		649	my $name = shift @kv;
		650	my %kv = (value => shift @kv, @kv);
		651
		652	my $cdom;
		653	my $cpath = (delete $kv{path}) \|\| "/";
		654
		655	if (exists $kv{domain}) {
		656	$cdom = delete $kv{domain};
387		657
388	my $cdom = (delete $kv{domain}) \|\| $uhost;
389	my $cpath = (delete $kv{path}) \|\| "/";
390
391	$cdom =~ s/^.?/./; # make sure it starts with a "."	658	$cdom =~ s/^\.?/./; # make sure it starts with a "."
392		659
393	next if $cdom =~ /\.$/;	660	next if $cdom =~ /\.$/;
394		661
395	# this is not rfc-like and not netscape-like. go figure.	662	# this is not rfc-like and not netscape-like. go figure.
396	my $ndots = $cdom =~ y/.//;	663	my $ndots = $cdom =~ y/.//;
397	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	664	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		665	} else {
		666	$cdom = $uhost;
		667	}
398		668
399	# store it	669	# store it
400	$arg{cookie_jar}{version} = 1;	670	$arg{cookie_jar}{version} = 1;
401	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;	671	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		672
		673	redo if /\G\s*,/gc;
402	}	674	}
403	}	675	}
404		676
405	if ($_[1]{Status} =~ /^x30[12]$/ && $recurse) {	677	if ($redirect && exists $hdr{location}) {
406	# microsoft and other assholes don't give a shit for following standards,	678	# we ignore any errors, as it is very common to receive
407	# try to support a common form of broken Location header.	679	# Content-Length != 0 but no actual body
408	$_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;	680	# we also access %hdr, as $_[1] might be an erro
409		681	http_request (
410	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);	682	$method => $hdr{location},
		683	%arg,
		684	recurse => $recurse - 1,
		685	Redirect => [$_[0], \%hdr],
		686	$cb);
411	} else {	687	} else {
412	$cb->($_[0], $_[1]);	688	$cb->($_[0], \%hdr);
413	}	689	}
414	};	690	};
415		691
416	if ($hdr{Status} =~ /^(?:1..\|204\|304)$/ or $method eq "HEAD") {	692	my $len = $hdr{"content-length"};
		693
		694	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		695	$finish->(undef, 598 => "Request cancelled by on_header");
		696	} elsif (
		697	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		698	or $method eq "HEAD"
		699	or (defined $len && !$len)
		700	) {
		701	# no body
417	$finish->(undef, \%hdr);	702	$finish->("", undef, undef, 1);
418	} else {	703	} else {
419	if (exists $hdr{"content-length"}) {	704	# body handling, many different code paths
420	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	705	# - no body expected
421	# could cache persistent connection now	706	# - want_body_handle
422	if ($hdr{connection} =~ /\bkeep-alive\b/i) {	707	# - te chunked
423	# but we don't, due to misdesigns, this is annoyingly complex	708	# - 2x length known (with or without on_body)
		709	# - 2x length not known (with or without on_body)
		710	if (!$redirect && $arg{want_body_handle}) {
		711	$_[0]->on_eof (undef);
		712	$_[0]->on_error (undef);
		713	$_[0]->on_read (undef);
		714
		715	$finish->(delete $state{handle});
		716
		717	} elsif ($hdr{"transfer-encoding"} =~ /chunked/) {
		718	my $body = undef;
		719	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		720
		721	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		722
		723	my $read_chunk; $read_chunk = sub {
		724	warn $_[1];#d#
		725	$_[1] =~ /^([0-9a-fA-F]+)/
		726	or $finish->(undef, 599 => "Garbled chunked transfer encoding");
		727
		728	my $len = hex $1;
		729
		730	if ($len) {
		731	$_[0]->push_read (chunk => hex $1, sub {
		732	$on_body->($_[1], \%hdr)
		733	or return $finish->(undef, 598 => "Request cancelled by on_body");
		734
		735	$_[0]->push_read (line => sub {
		736	length $_[1]
		737	and return $finish->(undef, 599 => "Garbled chunked transfer encoding");
		738	$_[0]->push_read (line => $read_chunk);
		739	});
		740	});
		741	} else {
		742	$_[0]->push_read (line => $qr_nlnl, sub {
		743	if (length $_[1]) {
		744	for ("$_[1]") {
		745	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		746
		747	my $hdr = parse_hdr
		748	or return $finish->(undef, 599 => "Garbled response trailers");
		749
		750	%hdr = (%hdr, %$hdr);
		751	}
		752	}
		753
		754	$finish->($body, undef, undef, 1);
		755	});
		756	}
		757	};
		758
		759	$_[0]->push_read (line => $read_chunk);
		760
		761	} elsif ($arg{on_body}) {
		762	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		763
		764	if ($len) {
		765	$_[0]->on_read (sub {
		766	$len -= length $_[0]{rbuf};
		767
		768	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		769	or return $finish->(undef, 598 => "Request cancelled by on_body");
		770
		771	$len > 0
		772	or $finish->("", undef, undef, 1);
424	};	773	});
425		774	} else {
		775	$_[0]->on_eof (sub {
426	$finish->($_[1], \%hdr);	776	$finish->("");
		777	});
		778	$_[0]->on_read (sub {
		779	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		780	or $finish->(undef, 598 => "Request cancelled by on_body");
		781	});
427	});	782	}
428	} else {	783	} else {
429	# too bad, need to read until we get an error or EOF,
430	# no way to detect winged data.
431	$_[0]->on_error (sub {
432	$finish->($_[0]{rbuf}, \%hdr);
433	});
434	$_[0]->on_eof (undef);	784	$_[0]->on_eof (undef);
		785
		786	if ($len) {
		787	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		788	$_[0]->on_read (sub {
		789	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		790	if $len <= length $_[0]{rbuf};
		791	});
		792	} else {
		793	$_[0]->on_error (sub {
		794	($! == Errno::EPIPE \|\| !$!)
		795	? $finish->(delete $_[0]{rbuf})
		796	: $finish->(undef, 599 => $_[2]);
		797	});
435	$_[0]->on_read (sub { });	798	$_[0]->on_read (sub { });
		799	}
436	}	800	}
437	}	801	}
438	});	802	});
439	});	803	};
440	}, sub {	804
441	$timeout	805	# now handle proxy-CONNECT method
		806	if ($proxy && $uscheme eq "https") {
		807	# oh dear, we have to wrap it into a connect request
		808
		809	# maybe re-use $uauthority with patched port?
		810	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		811	$state{handle}->push_read (line => $qr_nlnl, sub {
		812	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		813	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
		814
		815	if ($2 == 200) {
		816	$rpath = $upath;
		817	&$handle_actual_request;
		818	} else {
		819	%state = ();
		820	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
		821	}
		822	});
		823	} else {
		824	&$handle_actual_request;
		825	}
442	};	826	};
		827
		828	my $tcp_connect = $arg{tcp_connect}
		829	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		830
		831	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		832
443	};	833	};
444		834
445	defined wantarray && AnyEvent::Util::guard { %state = () }	835	defined wantarray && AnyEvent::Util::guard { %state = () }
446	}	836	}
447		837
448	sub http_get($$;@) {	838	sub http_get($@) {
449	unshift @_, "GET";	839	unshift @_, "GET";
450	&http_request	840	&http_request
451	}	841	}
452		842
453	sub http_head($$;@) {	843	sub http_head($@) {
454	unshift @_, "HEAD";	844	unshift @_, "HEAD";
455	&http_request	845	&http_request
456	}	846	}
457		847
458	sub http_post($$$;@) {	848	sub http_post($$@) {
		849	my $url = shift;
459	unshift @_, "POST", "body";	850	unshift @_, "POST", $url, "body";
460	&http_request	851	&http_request
461	}	852	}
462		853
463	=back	854	=back
464		855
		856	=head2 DNS CACHING
		857
		858	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		859	the actual connection, which in turn uses AnyEvent::DNS to resolve
		860	hostnames. The latter is a simple stub resolver and does no caching
		861	on its own. If you want DNS caching, you currently have to provide
		862	your own default resolver (by storing a suitable resolver object in
		863	C<$AnyEvent::DNS::RESOLVER>).
		864
465	=head2 GLOBAL FUNCTIONS AND VARIABLES	865	=head2 GLOBAL FUNCTIONS AND VARIABLES
466		866
467	=over 4	867	=over 4
468		868
469	=item AnyEvent::HTTP::set_proxy "proxy-url"	869	=item AnyEvent::HTTP::set_proxy "proxy-url"
470		870
471	Sets the default proxy server to use. The proxy-url must begin with a	871	Sets the default proxy server to use. The proxy-url must begin with a
472	string of the form C<http://host:port> (optionally C<https:...>).	872	string of the form C<http://host:port> (optionally C<https:...>), croaks
		873	otherwise.
		874
		875	To clear an already-set proxy, use C<undef>.
		876
		877	=item $date = AnyEvent::HTTP::format_date $timestamp
		878
		879	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		880	Date (RFC 2616).
		881
		882	=item $timestamp = AnyEvent::HTTP::parse_date $date
		883
		884	Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX
		885	timestamp, or C<undef> if the date cannot be parsed.
473		886
474	=item $AnyEvent::HTTP::MAX_RECURSE	887	=item $AnyEvent::HTTP::MAX_RECURSE
475		888
476	The default value for the C<recurse> request parameter (default: C<10>).	889	The default value for the C<recurse> request parameter (default: C<10>).
477		890
478	=item $AnyEvent::HTTP::USERAGENT	891	=item $AnyEvent::HTTP::USERAGENT
479		892
480	The default value for the C<User-Agent> header (the default is	893	The default value for the C<User-Agent> header (the default is
481	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	894	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
482		895
483	=item $AnyEvent::HTTP::MAX_PERSISTENT	896	=item $AnyEvent::HTTP::MAX_PER_HOST
484		897
485	The maximum number of persistent connections to keep open (default: 8).	898	The maximum number of concurrent connections to the same host (identified
		899	by the hostname). If the limit is exceeded, then the additional requests
		900	are queued until previous connections are closed.
486		901
487	Not implemented currently.	902	The default value for this is C<4>, and it is highly advisable to not
		903	increase it.
488		904
489	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	905	=item $AnyEvent::HTTP::ACTIVE
490		906
491	The maximum time to cache a persistent connection, in seconds (default: 2).	907	The number of active connections. This is not the number of currently
492		908	running requests, but the number of currently open and non-idle TCP
493	Not implemented currently.	909	connections. This number of can be useful for load-leveling.
494		910
495	=back	911	=back
496		912
497	=cut	913	=cut
498		914
		915	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		916	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		917
		918	sub format_date($) {
		919	my ($time) = @_;
		920
		921	# RFC 822/1123 format
		922	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		923
		924	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		925	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		926	$H, $M, $S;
		927	}
		928
		929	sub parse_date($) {
		930	my ($date) = @_;
		931
		932	my ($d, $m, $y, $H, $M, $S);
		933
		934	if ($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$/) {
		935	# RFC 822/1123, required by RFC 2616
		936	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		937
		938	} elsif ($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$/) {
		939	# RFC 850
		940	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		941
		942	} elsif ($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])$/) {
		943	# ISO C's asctime
		944	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		945	}
		946	# other formats fail in the loop below
		947
		948	for (0..11) {
		949	if ($m eq $month[$_]) {
		950	require Time::Local;
		951	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		952	}
		953	}
		954
		955	undef
		956	}
		957
499	sub set_proxy($) {	958	sub set_proxy($) {
		959	if (length $_[0]) {
500	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	960	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		961	or Carp::croak "$_[0]: invalid proxy URL";
		962	$PROXY = [$2, $3 \|\| 3128, $1]
		963	} else {
		964	undef $PROXY;
		965	}
501	}	966	}
502		967
503	# initialise proxy from environment	968	# initialise proxy from environment
		969	eval {
504	set_proxy $ENV{http_proxy};	970	set_proxy $ENV{http_proxy};
		971	};
		972
		973	=head2 SOCKS PROXIES
		974
		975	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		976	compile your perl to support socks, or use an external program such as
		977	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		978	transparently.
		979
		980	Alternatively, for AnyEvent::HTTP only, you can use your own
		981	C<tcp_connect> function that does the proxy handshake - here is an example
		982	that works with socks4a proxies:
		983
		984	use Errno;
		985	use AnyEvent::Util;
		986	use AnyEvent::Socket;
		987	use AnyEvent::Handle;
		988
		989	# host, port and username of/for your socks4a proxy
		990	my $socks_host = "10.0.0.23";
		991	my $socks_port = 9050;
		992	my $socks_user = "";
		993
		994	sub socks4a_connect {
		995	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		996
		997	my $hdl = new AnyEvent::Handle
		998	connect => [$socks_host, $socks_port],
		999	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1000	on_error => sub { $connect_cb->() },
		1001	;
		1002
		1003	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1004
		1005	$hdl->push_read (chunk => 8, sub {
		1006	my ($hdl, $chunk) = @_;
		1007	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1008
		1009	if ($status == 0x5a) {
		1010	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1011	} else {
		1012	$! = Errno::ENXIO; $connect_cb->();
		1013	}
		1014	});
		1015
		1016	$hdl
		1017	}
		1018
		1019	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1020	possibly after switching off other proxy types:
		1021
		1022	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1023
		1024	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1025	my ($data, $headers) = @_;
		1026	...
		1027	};
505		1028
506	=head1 SEE ALSO	1029	=head1 SEE ALSO
507		1030
508	L<AnyEvent>.	1031	L<AnyEvent>.
509		1032
510	=head1 AUTHOR	1033	=head1 AUTHOR
511		1034
512	Marc Lehmann <schmorp@schmorp.de>	1035	Marc Lehmann <schmorp@schmorp.de>
513	http://home.schmorp.de/	1036	http://home.schmorp.de/
		1037
		1038	With many thanks to Дмитрий Шалашов, who provided countless
		1039	testcases and bugreports.
514		1040
515	=cut	1041	=cut
516		1042
517	1	1043	1
518		1044

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.12 by root, Thu Jun 5 16:33:02 2008 UTC vs. Revision 1.66 by root, Fri Dec 31 06:18:30 2010 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.12 by root, Thu Jun 5 16:33:02 2008 UTC vs.
Revision 1.66 by root, Fri Dec 31 06:18:30 2010 UTC