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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.11 by root, Thu Jun 5 15:34:00 2008 UTC vs.
Revision 1.67 by root, Fri Dec 31 06:18:54 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) = @_;
…		…
121	Whether to recurse requests or not, e.g. on redirects, authentication	150	Whether to recurse requests or not, e.g. on redirects, authentication
122	retries and so on, and how often to do so.	151	retries and so on, and how often to do so.
123		152
124	=item headers => hashref	153	=item headers => hashref
125		154
126	The request headers to use.	155	The request headers to use. Currently, C<http_request> may provide its
		156	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
		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).
127		160
128	=item timeout => $seconds	161	=item timeout => $seconds
129		162
130	The time-out to use for various stages - each connect attempt will reset	163	The time-out to use for various stages - each connect attempt will reset
131	the timeout, as will read or write activity. Default timeout is 5 minutes.	164	the timeout, as will read or write activity, i.e. this is not an overall
		165	timeout.
		166
		167	Default timeout is 5 minutes.
132		168
133	=item proxy => [$host, $port[, $scheme]] or undef	169	=item proxy => [$host, $port[, $scheme]] or undef
134		170
135	Use the given http proxy for all requests. If not specified, then the	171	Use the given http proxy for all requests. If not specified, then the
136	default proxy (as specified by C<$ENV{http_proxy}>) is used.	172	default proxy (as specified by C<$ENV{http_proxy}>) is used.
137		173
138	C<$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
139	HTTPS.	175	HTTPS.
140		176
141	=item body => $string	177	=item body => $string
142		178
143	The request body, usually empty. Will be-sent as-is (future versions of	179	The request body, usually empty. Will be-sent as-is (future versions of
…		…
149	based on the original netscape specification.	185	based on the original netscape specification.
150		186
151	The C<$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
152	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
153	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
154	recommended, as expire times are currently being ignored.	190	recommended, as expiry times are currently being ignored.
155		191
156	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
157	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
158	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
159	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
160	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.
161		292
162	=back	293	=back
163		294
164	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/
165		296
…		…
179	use Data::Dumper;	310	use Data::Dumper;
180	print Dumper $hdr;	311	print Dumper $hdr;
181	}	312	}
182	;	313	;
183		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 $request;
		324
184	=cut	325	=cut
185		326
		327	sub _slot_schedule;
186	sub _slot_schedule($) {	328	sub _slot_schedule($) {
187	my $host = shift;	329	my $host = shift;
188		330
189	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {	331	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
190	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {	332	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
191	# somebody wnats that slot	333	# somebody wants that slot
192	++$CO_SLOT{$host}[0];	334	++$CO_SLOT{$host}[0];
		335	++$ACTIVE;
193		336
194	$cb->(AnyEvent::Util::guard {	337	$cb->(AnyEvent::Util::guard {
		338	--$ACTIVE;
195	--$CO_SLOT{$host}[0];	339	--$CO_SLOT{$host}[0];
196	_slot_schedule $host;	340	_slot_schedule $host;
197	});	341	});
198	} else {	342	} else {
199	# nobody wants the slot, maybe we can forget about it	343	# nobody wants the slot, maybe we can forget about it
200	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];	344	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
201	warn "$host deleted" unless $CO_SLOT{$host}[0];#d#
202	last;	345	last;
203	}	346	}
204	}	347	}
205	}	348	}
206		349
…		…
209	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	352	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
210		353
211	_slot_schedule $_[0];	354	_slot_schedule $_[0];
212	}	355	}
213		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
214	sub http_request($$$;@) {	387	sub http_request($$@) {
215	my $cb = pop;	388	my $cb = pop;
216	my ($method, $url, %arg) = @_;	389	my ($method, $url, %arg) = @_;
217		390
218	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";
219		395
220	$method = uc $method;	396	$method = uc $method;
221		397
222	if (my $hdr = $arg{headers}) {	398	if (my $hdr = $arg{headers}) {
223	while (my ($k, $v) = each %$hdr) {	399	while (my ($k, $v) = each %$hdr) {
224	$hdr{lc $k} = $v;	400	$hdr{lc $k} = $v;
225	}	401	}
226	}	402	}
227		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
228	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;	408	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
229		409
230	return $cb->(undef, { Status => 599, Reason => "recursion limit reached" })	410	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
231	if $recurse < 0;	411	if $recurse < 0;
232		412
233	my $proxy = $arg{proxy} \|\| $PROXY;	413	my $proxy = $arg{proxy} \|\| $PROXY;
234	my $timeout = $arg{timeout} \|\| $TIMEOUT;	414	my $timeout = $arg{timeout} \|\| $TIMEOUT;
235		415
236	$hdr{"user-agent"} \|\|= $USERAGENT;
237
238	my ($scheme, $authority, $upath, $query, $fragment) =	416	my ($uscheme, $uauthority, $upath, $query, $fragment) =
239	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	417	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
240		418
241	$scheme = lc $scheme;	419	$uscheme = lc $uscheme;
242		420
243	my $uport = $scheme eq "http" ? 80	421	my $uport = $uscheme eq "http" ? 80
244	: $scheme eq "https" ? 443	422	: $uscheme eq "https" ? 443
245	: 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" });
246		424
247	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	425	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
248	or return $cb->(undef, { Status => 599, Reason => "unparsable URL" });	426	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
249		427
250	my $uhost = $1;	428	my $uhost = $1;
251	$uport = $2 if defined $2;	429	$uport = $2 if defined $2;
252		430
		431	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		432	unless exists $hdr{host};
		433
253	$uhost =~ s/^\[(.*)\]$/$1/;	434	$uhost =~ s/^\[(.*)\]$/$1/;
254	$upath .= "?$query" if length $query;	435	$upath .= $query if length $query;
255		436
256	$upath =~ s%^/?%/%;	437	$upath =~ s%^/?%/%;
257		438
258	# cookie processing	439	# cookie processing
259	if (my $jar = $arg{cookie_jar}) {	440	if (my $jar = $arg{cookie_jar}) {
260	%$jar = () if $jar->{version} < 1;	441	%$jar = () if $jar->{version} != 1;
261		442
262	my @cookie;	443	my @cookie;
263		444
264	while (my ($chost, $v) = each %$jar) {	445	while (my ($chost, $v) = each %$jar) {
		446	if ($chost =~ /^\./) {
265	next unless $chost eq substr $uhost, -length $chost;	447	next unless $chost eq substr $uhost, -length $chost;
266	next unless $chost =~ /^\./;	448	} elsif ($chost =~ /\./) {
		449	next unless $chost eq $uhost;
		450	} else {
		451	next;
		452	}
267		453
268	while (my ($cpath, $v) = each %$v) {	454	while (my ($cpath, $v) = each %$v) {
269	next unless $cpath eq substr $upath, 0, length $cpath;	455	next unless $cpath eq substr $upath, 0, length $cpath;
270		456
271	while (my ($k, $v) = each %$v) {	457	while (my ($k, $v) = each %$v) {
272	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;
273	push @cookie, "$k=$v->{value}";	461	push @cookie, "$k=\"$value\"";
274	}	462	}
275	}	463	}
276	}	464	}
277		465
278	$hdr{cookie} = join "; ", @cookie	466	$hdr{cookie} = join "; ", @cookie
279	if @cookie;	467	if @cookie;
280	}	468	}
281		469
282	my ($rhost, $rport, $rpath); # request host, port, path	470	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
283		471
284	if ($proxy) {	472	if ($proxy) {
285	($rhost, $rport, $scheme) = @$proxy;	473	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
286	$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" && $rscheme eq "https";
287	} else {	480	} else {
288	($rhost, $rport, $rpath) = ($uhost, $uport, $upath);	481	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
289	$hdr{host} = $uhost;
290	}	482	}
291		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
292	$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};
293		493
294	my %state = (connect_guard => 1);	494	my %state = (connect_guard => 1);
295		495
296	_get_slot $uhost, sub {	496	_get_slot $uhost, sub {
297	$state{slot_guard} = shift;	497	$state{slot_guard} = shift;
298		498
299	return unless $state{connect_guard};	499	return unless $state{connect_guard};
300		500
301	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	501	my $connect_cb = sub {
302	$state{fh} = shift	502	$state{fh} = shift
		503	or do {
		504	my $err = "$!";
		505	%state = ();
303	or return $cb->(undef, { Status => 599, Reason => "$!" });	506	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
		507	};
304		508
305	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};
306		512
307	# get handle	513	# get handle
308	$state{handle} = new AnyEvent::Handle	514	$state{handle} = new AnyEvent::Handle
309	fh => $state{fh},	515	fh => $state{fh},
310	($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	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
		527	},
		528	;
311		529
312	# limit the number of persistent connections	530	# limit the number of persistent connections
		531	# keepalive not yet supported
313	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	532	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
314	++$KA_COUNT{$_[1]};	533	# ++$KA_COUNT{$_[1]};
315	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	534	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		535	# --$KA_COUNT{$_[1]}
		536	# };
316	$hdr{connection} = "keep-alive";	537	# $hdr{connection} = "keep-alive";
317	delete $hdr{connection}; # keep-alive not yet supported
318	} else {	538	# } else {
319	delete $hdr{connection};	539	# delete $hdr{connection};
320	}	540	# }
321		541
322	# (re-)configure handle	542	$state{handle}->starttls ("connect") if $rscheme eq "https";
323	$state{handle}->timeout ($timeout);
324	$state{handle}->on_error (sub {
325	%state = ();
326	$cb->(undef, { Status => 599, Reason => "$!" });
327	});
328	$state{handle}->on_eof (sub {
329	%state = ();
330	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
331	});
332		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
333	# send request	548	# send request
334	$state{handle}->push_write (	549	$state{handle}->push_write (
335	"$method $rpath HTTP/1.0\015\012"	550	"$method $rpath HTTP/1.1\015\012"
336	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)	551	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
337	. "\015\012"	552	. "\015\012"
338	. (delete $arg{body})	553	. (delete $arg{body})
339	);
340
341	%hdr = (); # reduce memory usage, save a kitten
342
343	# status line
344	$state{handle}->push_read (line => qr/\015?\012/, sub {
345	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
346	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
347
348	my %hdr = ( # response headers
349	HTTPVersion => "\x00$1",
350	Status => "\x00$2",
351	Reason => "\x00$3",
352	);	554	);
353		555
354	# 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
355	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {	562	$state{handle}->push_read (line => $qr_nlnl, sub {
		563	my $keepalive = pop;
		564
356	for ("$_[1]\012") {	565	for ("$_[1]") {
357	# 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.
358	# creates them.
359	$hdr{lc $1} .= "\x00$2"
360	while /\G
361	([^:\000-\037]+):
362	[\011\040]*
363	((?: [^\015\012]+ \| \015?\012[\011\040] )*)
364	\015?\012
365	/gxc;
366		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 => $3,
367	/\G$/	575	;
		576
		577	my $hdr = parse_hdr
368	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);
369	}	581	}
370		582
371	substr $_, 0, 1, ""	583	# redirect handling
372	for values %hdr;	584	# microsoft and other shitheads don't give a shit for following standards,
		585	# try to support some common forms of broken Location headers.
		586	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		587	$hdr{location} =~ s/^\.\/+//;
373		588
374	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};
375	%state = ();	620	%state = ();
376		621
		622	if (defined $_[1]) {
		623	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		624	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		625	}
		626
377	# set-cookie processing	627	# set-cookie processing
378	if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {	628	if ($arg{cookie_jar}) {
379	for (split /\x00/, $hdr{"set-cookie"}) {	629	for ($hdr{"set-cookie"}) {
380	my ($cookie, @arg) = split /;\s*/;	630	# parse NAME=VALUE
381	my ($name, $value) = split /=/, $cookie, 2;	631	my @kv;
382	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};
383		657
384	my $cdom = (delete $kv{domain}) \|\| $uhost;
385	my $cpath = (delete $kv{path}) \|\| "/";
386
387	$cdom =~ s/^.?/./; # make sure it starts with a "."	658	$cdom =~ s/^\.?/./; # make sure it starts with a "."
388		659
389	next if $cdom =~ /\.$/;	660	next if $cdom =~ /\.$/;
390		661
391	# this is not rfc-like and not netscape-like. go figure.	662	# this is not rfc-like and not netscape-like. go figure.
392	my $ndots = $cdom =~ y/.//;	663	my $ndots = $cdom =~ y/.//;
393	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	664	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		665	} else {
		666	$cdom = $uhost;
		667	}
394		668
395	# store it	669	# store it
396	$arg{cookie_jar}{version} = 1;	670	$arg{cookie_jar}{version} = 1;
397	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;	671	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		672
		673	redo if /\G\s*,/gc;
398	}	674	}
399	}	675	}
400		676
401	if ($_[1]{Status} =~ /^x30[12]$/ && $recurse) {	677	if ($redirect && exists $hdr{location}) {
402	# microsoft and other assholes don't give a shit for following standards,	678	# we ignore any errors, as it is very common to receive
403	# try to support a common form of broken Location header.	679	# Content-Length != 0 but no actual body
404	$_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;	680	# we also access %hdr, as $_[1] might be an erro
405		681	http_request (
406	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);	682	$method => $hdr{location},
		683	%arg,
		684	recurse => $recurse - 1,
		685	Redirect => [$_[0], \%hdr],
		686	$cb);
407	} else {	687	} else {
408	$cb->($_[0], $_[1]);	688	$cb->($_[0], \%hdr);
409	}	689	}
410	};	690	};
411		691
412	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
413	$finish->(undef, \%hdr);	702	$finish->("", undef, undef, 1);
414	} else {	703	} else {
415	if (exists $hdr{"content-length"}) {	704	# body handling, many different code paths
416	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	705	# - no body expected
417	# could cache persistent connection now	706	# - want_body_handle
418	if ($hdr{connection} =~ /\bkeep-alive\b/i) {	707	# - te chunked
419	# 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	$_[1] =~ /^([0-9a-fA-F]+)/
		725	or $finish->(undef, 599 => "Garbled chunked transfer encoding");
		726
		727	my $len = hex $1;
		728
		729	if ($len) {
		730	$_[0]->push_read (chunk => hex $1, sub {
		731	$on_body->($_[1], \%hdr)
		732	or return $finish->(undef, 598 => "Request cancelled by on_body");
		733
		734	$_[0]->push_read (line => sub {
		735	length $_[1]
		736	and return $finish->(undef, 599 => "Garbled chunked transfer encoding");
		737	$_[0]->push_read (line => $read_chunk);
		738	});
		739	});
		740	} else {
		741	$_[0]->push_read (line => $qr_nlnl, sub {
		742	if (length $_[1]) {
		743	for ("$_[1]") {
		744	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		745
		746	my $hdr = parse_hdr
		747	or return $finish->(undef, 599 => "Garbled response trailers");
		748
		749	%hdr = (%hdr, %$hdr);
		750	}
		751	}
		752
		753	$finish->($body, undef, undef, 1);
		754	});
		755	}
		756	};
		757
		758	$_[0]->push_read (line => $read_chunk);
		759
		760	} elsif ($arg{on_body}) {
		761	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		762
		763	if ($len) {
		764	$_[0]->on_read (sub {
		765	$len -= length $_[0]{rbuf};
		766
		767	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		768	or return $finish->(undef, 598 => "Request cancelled by on_body");
		769
		770	$len > 0
		771	or $finish->("", undef, undef, 1);
420	};	772	});
421		773	} else {
		774	$_[0]->on_eof (sub {
422	$finish->($_[1], \%hdr);	775	$finish->("");
		776	});
		777	$_[0]->on_read (sub {
		778	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		779	or $finish->(undef, 598 => "Request cancelled by on_body");
		780	});
423	});	781	}
424	} else {	782	} else {
425	# too bad, need to read until we get an error or EOF,
426	# no way to detect winged data.
427	$_[0]->on_error (sub {
428	$finish->($_[0]{rbuf}, \%hdr);
429	});
430	$_[0]->on_eof (undef);	783	$_[0]->on_eof (undef);
		784
		785	if ($len) {
		786	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		787	$_[0]->on_read (sub {
		788	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		789	if $len <= length $_[0]{rbuf};
		790	});
		791	} else {
		792	$_[0]->on_error (sub {
		793	($! == Errno::EPIPE \|\| !$!)
		794	? $finish->(delete $_[0]{rbuf})
		795	: $finish->(undef, 599 => $_[2]);
		796	});
431	$_[0]->on_read (sub { });	797	$_[0]->on_read (sub { });
		798	}
432	}	799	}
433	}	800	}
434	});	801	});
435	});	802	};
436	}, sub {	803
437	$timeout	804	# now handle proxy-CONNECT method
		805	if ($proxy && $uscheme eq "https") {
		806	# oh dear, we have to wrap it into a connect request
		807
		808	# maybe re-use $uauthority with patched port?
		809	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		810	$state{handle}->push_read (line => $qr_nlnl, sub {
		811	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		812	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
		813
		814	if ($2 == 200) {
		815	$rpath = $upath;
		816	&$handle_actual_request;
		817	} else {
		818	%state = ();
		819	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
		820	}
		821	});
		822	} else {
		823	&$handle_actual_request;
		824	}
438	};	825	};
		826
		827	my $tcp_connect = $arg{tcp_connect}
		828	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		829
		830	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		831
439	};	832	};
440		833
441	defined wantarray && AnyEvent::Util::guard { %state = () }	834	defined wantarray && AnyEvent::Util::guard { %state = () }
442	}	835	}
443		836
444	sub http_get($$;@) {	837	sub http_get($@) {
445	unshift @_, "GET";	838	unshift @_, "GET";
446	&http_request	839	&http_request
447	}	840	}
448		841
449	sub http_head($$;@) {	842	sub http_head($@) {
450	unshift @_, "HEAD";	843	unshift @_, "HEAD";
451	&http_request	844	&http_request
452	}	845	}
453		846
454	sub http_post($$$;@) {	847	sub http_post($$@) {
		848	my $url = shift;
455	unshift @_, "POST", "body";	849	unshift @_, "POST", $url, "body";
456	&http_request	850	&http_request
457	}	851	}
458		852
459	=back	853	=back
460		854
		855	=head2 DNS CACHING
		856
		857	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		858	the actual connection, which in turn uses AnyEvent::DNS to resolve
		859	hostnames. The latter is a simple stub resolver and does no caching
		860	on its own. If you want DNS caching, you currently have to provide
		861	your own default resolver (by storing a suitable resolver object in
		862	C<$AnyEvent::DNS::RESOLVER>).
		863
461	=head2 GLOBAL FUNCTIONS AND VARIABLES	864	=head2 GLOBAL FUNCTIONS AND VARIABLES
462		865
463	=over 4	866	=over 4
464		867
465	=item AnyEvent::HTTP::set_proxy "proxy-url"	868	=item AnyEvent::HTTP::set_proxy "proxy-url"
466		869
467	Sets the default proxy server to use. The proxy-url must begin with a	870	Sets the default proxy server to use. The proxy-url must begin with a
468	string of the form C<http://host:port> (optionally C<https:...>).	871	string of the form C<http://host:port> (optionally C<https:...>), croaks
		872	otherwise.
		873
		874	To clear an already-set proxy, use C<undef>.
		875
		876	=item $date = AnyEvent::HTTP::format_date $timestamp
		877
		878	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		879	Date (RFC 2616).
		880
		881	=item $timestamp = AnyEvent::HTTP::parse_date $date
		882
		883	Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX
		884	timestamp, or C<undef> if the date cannot be parsed.
469		885
470	=item $AnyEvent::HTTP::MAX_RECURSE	886	=item $AnyEvent::HTTP::MAX_RECURSE
471		887
472	The default value for the C<recurse> request parameter (default: C<10>).	888	The default value for the C<recurse> request parameter (default: C<10>).
473		889
474	=item $AnyEvent::HTTP::USERAGENT	890	=item $AnyEvent::HTTP::USERAGENT
475		891
476	The default value for the C<User-Agent> header (the default is	892	The default value for the C<User-Agent> header (the default is
477	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	893	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
478		894
479	=item $AnyEvent::HTTP::MAX_PERSISTENT	895	=item $AnyEvent::HTTP::MAX_PER_HOST
480		896
481	The maximum number of persistent connections to keep open (default: 8).	897	The maximum number of concurrent connections to the same host (identified
		898	by the hostname). If the limit is exceeded, then the additional requests
		899	are queued until previous connections are closed.
482		900
483	Not implemented currently.	901	The default value for this is C<4>, and it is highly advisable to not
		902	increase it.
484		903
485	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	904	=item $AnyEvent::HTTP::ACTIVE
486		905
487	The maximum time to cache a persistent connection, in seconds (default: 2).	906	The number of active connections. This is not the number of currently
488		907	running requests, but the number of currently open and non-idle TCP
489	Not implemented currently.	908	connections. This number of can be useful for load-leveling.
490		909
491	=back	910	=back
492		911
493	=cut	912	=cut
494		913
		914	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		915	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		916
		917	sub format_date($) {
		918	my ($time) = @_;
		919
		920	# RFC 822/1123 format
		921	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		922
		923	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		924	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		925	$H, $M, $S;
		926	}
		927
		928	sub parse_date($) {
		929	my ($date) = @_;
		930
		931	my ($d, $m, $y, $H, $M, $S);
		932
		933	if ($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$/) {
		934	# RFC 822/1123, required by RFC 2616
		935	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		936
		937	} elsif ($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$/) {
		938	# RFC 850
		939	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		940
		941	} elsif ($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])$/) {
		942	# ISO C's asctime
		943	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		944	}
		945	# other formats fail in the loop below
		946
		947	for (0..11) {
		948	if ($m eq $month[$_]) {
		949	require Time::Local;
		950	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		951	}
		952	}
		953
		954	undef
		955	}
		956
495	sub set_proxy($) {	957	sub set_proxy($) {
		958	if (length $_[0]) {
496	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	959	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		960	or Carp::croak "$_[0]: invalid proxy URL";
		961	$PROXY = [$2, $3 \|\| 3128, $1]
		962	} else {
		963	undef $PROXY;
		964	}
497	}	965	}
498		966
499	# initialise proxy from environment	967	# initialise proxy from environment
		968	eval {
500	set_proxy $ENV{http_proxy};	969	set_proxy $ENV{http_proxy};
		970	};
		971
		972	=head2 SOCKS PROXIES
		973
		974	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		975	compile your perl to support socks, or use an external program such as
		976	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		977	transparently.
		978
		979	Alternatively, for AnyEvent::HTTP only, you can use your own
		980	C<tcp_connect> function that does the proxy handshake - here is an example
		981	that works with socks4a proxies:
		982
		983	use Errno;
		984	use AnyEvent::Util;
		985	use AnyEvent::Socket;
		986	use AnyEvent::Handle;
		987
		988	# host, port and username of/for your socks4a proxy
		989	my $socks_host = "10.0.0.23";
		990	my $socks_port = 9050;
		991	my $socks_user = "";
		992
		993	sub socks4a_connect {
		994	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		995
		996	my $hdl = new AnyEvent::Handle
		997	connect => [$socks_host, $socks_port],
		998	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		999	on_error => sub { $connect_cb->() },
		1000	;
		1001
		1002	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1003
		1004	$hdl->push_read (chunk => 8, sub {
		1005	my ($hdl, $chunk) = @_;
		1006	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1007
		1008	if ($status == 0x5a) {
		1009	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1010	} else {
		1011	$! = Errno::ENXIO; $connect_cb->();
		1012	}
		1013	});
		1014
		1015	$hdl
		1016	}
		1017
		1018	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1019	possibly after switching off other proxy types:
		1020
		1021	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1022
		1023	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1024	my ($data, $headers) = @_;
		1025	...
		1026	};
501		1027
502	=head1 SEE ALSO	1028	=head1 SEE ALSO
503		1029
504	L<AnyEvent>.	1030	L<AnyEvent>.
505		1031
506	=head1 AUTHOR	1032	=head1 AUTHOR
507		1033
508	Marc Lehmann <schmorp@schmorp.de>	1034	Marc Lehmann <schmorp@schmorp.de>
509	http://home.schmorp.de/	1035	http://home.schmorp.de/
		1036
		1037	With many thanks to Дмитрий Шалашов, who provided countless
		1038	testcases and bugreports.
510		1039
511	=cut	1040	=cut
512		1041
513	1	1042	1
514		1043

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.11 by root, Thu Jun 5 15:34:00 2008 UTC vs. Revision 1.67 by root, Fri Dec 31 06:18:54 2010 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.11 by root, Thu Jun 5 15:34:00 2008 UTC vs.
Revision 1.67 by root, Fri Dec 31 06:18:54 2010 UTC