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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.41 by root, Sun Jul 5 23:50:59 2009 UTC vs.
Revision 1.68 by root, Fri Dec 31 19:22:18 2010 UTC

…		…
41	use strict;	41	use strict;
42	no warnings;	42	no warnings;
43		43
44	use Errno ();	44	use Errno ();
45		45
46	use AnyEvent 4.452 ();	46	use AnyEvent 5.0 ();
47	use AnyEvent::Util ();	47	use AnyEvent::Util ();
48	use AnyEvent::Socket ();
49	use AnyEvent::Handle ();	48	use AnyEvent::Handle ();
50		49
51	use base Exporter::;	50	use base Exporter::;
52		51
53	our $VERSION = '1.12';	52	our $VERSION = '1.5';
54		53
55	our @EXPORT = qw(http_get http_post http_head http_request);	54	our @EXPORT = qw(http_get http_post http_head http_request);
56		55
57	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	56	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
58	our $MAX_RECURSE = 10;	57	our $MAX_RECURSE = 10;
59	our $MAX_PERSISTENT = 8;	58	our $MAX_PERSISTENT = 8;
60	our $PERSISTENT_TIMEOUT = 2;	59	our $PERSISTENT_TIMEOUT = 2;
61	our $TIMEOUT = 300;	60	our $TIMEOUT = 300;
62		61
63	# changing these is evil	62	# changing these is evil
64	our $MAX_PERSISTENT_PER_HOST = 2;	63	our $MAX_PERSISTENT_PER_HOST = 0;
65	our $MAX_PER_HOST = 4;	64	our $MAX_PER_HOST = 4;
66		65
67	our $PROXY;	66	our $PROXY;
68	our $ACTIVE = 0;	67	our $ACTIVE = 0;
69		68
…		…
92	must be an absolute http or https URL.	91	must be an absolute http or https URL.
93		92
94	When called in void context, nothing is returned. In other contexts,	93	When called in void context, nothing is returned. In other contexts,
95	C<http_request> returns a "cancellation guard" - you have to keep the	94	C<http_request> returns a "cancellation guard" - you have to keep the
96	object at least alive until the callback get called. If the object gets	95	object at least alive until the callback get called. If the object gets
97	destroyed before the callbakc is called, the request will be cancelled.	96	destroyed before the callback is called, the request will be cancelled.
98		97
99	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
100	(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
101	response headers as second argument.	100	(and trailers) as second argument.
102		101
103	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
104	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>	103	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
		104	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
105	contain the three parts of the HTTP Status-Line of the same name. The	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
106	pseudo-header C<URL> contains the original URL (which can differ from the	110	The pseudo-header C<URL> contains the actual URL (which can differ from
107	requested URL when following redirects).	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.
108		122
109	If the server sends a header multiple times, then their contents will be	123	If the server sends a header multiple times, then their contents will be
110	joined together with a comma (C<,>), as per the HTTP spec.	124	joined together with a comma (C<,>), as per the HTTP spec.
111		125
112	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,
…		…
136	Whether to recurse requests or not, e.g. on redirects, authentication	150	Whether to recurse requests or not, e.g. on redirects, authentication
137	retries and so on, and how often to do so.	151	retries and so on, and how often to do so.
138		152
139	=item headers => hashref	153	=item headers => hashref
140		154
141	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 own
142	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers	156	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
143	and will provide defaults for C<User-Agent:> and C<Referer:>.	157	will provide defaults for C<TE:>, C<Referer:> and C<User-Agent:> (this can
		158	be suppressed by using C<undef> for these headers in which case they won't
		159	be sent at all).
144		160
145	=item timeout => $seconds	161	=item timeout => $seconds
146		162
147	The time-out to use for various stages - each connect attempt will reset	163	The time-out to use for various stages - each connect attempt will reset
148	the timeout, as will read or write activity. Default timeout is 5 minutes.	164	the timeout, as will read or write activity, i.e. this is not an overall
		165	timeout.
		166
		167	Default timeout is 5 minutes.
149		168
150	=item proxy => [$host, $port[, $scheme]] or undef	169	=item proxy => [$host, $port[, $scheme]] or undef
151		170
152	Use the given http proxy for all requests. If not specified, then the	171	Use the given http proxy for all requests. If not specified, then the
153	default proxy (as specified by C<$ENV{http_proxy}>) is used.	172	default proxy (as specified by C<$ENV{http_proxy}>) is used.
154		173
155	C<$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
156	HTTPS.	175	HTTPS.
157		176
158	=item body => $string	177	=item body => $string
159		178
160	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
161	this module might offer more options).	180	this module might offer more options).
162		181
163	=item cookie_jar => $hash_ref	182	=item cookie_jar => $hash_ref
164		183
165	Passing this parameter enables (simplified) cookie-processing, loosely	184	Passing this parameter enables (simplified) cookie-processing, loosely
…		…
186	verification) TLS context.	205	verification) TLS context.
187		206
188	The default for this option is C<low>, which could be interpreted as "give	207	The default for this option is C<low>, which could be interpreted as "give
189	me the page, no matter what".	208	me the page, no matter what".
190		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
191	=item on_header => $callback->($hdr)	231	=item on_header => $callback->($headers)
192		232
193	When specified, this callback will be called with the header hash as soon	233	When specified, this callback will be called with the header hash as soon
194	as headers have been successfully received from the remote server (not on	234	as headers have been successfully received from the remote server (not on
195	locally-generated errors).	235	locally-generated errors).
196		236
…		…
200		240
201	This callback is useful, among other things, to quickly reject unwanted	241	This callback is useful, among other things, to quickly reject unwanted
202	content, which, if it is supposed to be rare, can be faster than first	242	content, which, if it is supposed to be rare, can be faster than first
203	doing a C<HEAD> request.	243	doing a C<HEAD> request.
204		244
		245	The downside is that cancelling the request makes it impossible to re-use
		246	the connection. Also, the C<on_header> callback will not receive any
		247	trailer (headers sent after the response body).
		248
		249	Example: cancel the request unless the content-type is "text/html".
		250
		251	on_header => sub {
		252	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		253	},
		254
205	=item on_body => $callback->($data, $hdr)	255	=item on_body => $callback->($partial_body, $headers)
206		256
207	When specified, all body data will be "filtered" through this callback.	257	When specified, all body data will be passed to this callback instead of
		258	to the completion callback. The completion callback will get the empty
		259	string instead of the body data.
208		260
209	The callback will incrementally receive body data, and is supposed to	261	It has to return either true (in which case AnyEvent::HTTP will continue),
210	return it or a modified version of it (empty strings are valid returns).	262	or false, in which case AnyEvent::HTTP will cancel the download (and call
		263	the completion callback with an error code of C<598>).
211		264
212	If the callback returns C<undef>, then the request will be cancelled.	265	The downside to cancelling the request is that it makes it impossible to
		266	re-use the connection.
213		267
214	This callback is useful when you want to do some processing on the data,	268	This callback is useful when the data is too large to be held in memory
215	or the data is too large to be held in memory (so the callback writes it	269	(so the callback writes it to a file) or when only some information should
216	to a file and returns the empty string) and so on.	270	be extracted, or when the body should be processed incrementally.
217		271
218	It is usually preferred over doing your own body handling via	272	It is usually preferred over doing your own body handling via
219	C<want_body_handle>.	273	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		274	only used to create a connection, C<want_body_handle> is the better
		275	alternative, as it allows you to install your own event handler, reducing
		276	resource usage.
220		277
221	=item want_body_handle => $enable	278	=item want_body_handle => $enable
222		279
223	When enabled (default is disabled), the behaviour of AnyEvent::HTTP	280	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
224	changes considerably: after parsing the headers, and instead of	281	changes considerably: after parsing the headers, and instead of
…		…
236	This is useful with some push-type services, where, after the initial	293	This is useful with some push-type services, where, after the initial
237	headers, an interactive protocol is used (typical example would be the	294	headers, an interactive protocol is used (typical example would be the
238	push-style twitter API which starts a JSON/XML stream).	295	push-style twitter API which starts a JSON/XML stream).
239		296
240	If you think you need this, first have a look at C<on_body>, to see if	297	If you think you need this, first have a look at C<on_body>, to see if
241	that doesn'T solve your problem in a better way.	298	that doesn't solve your problem in a better way.
242		299
243	=back	300	=back
244		301
245	Example: make a simple HTTP GET request for http://www.nethype.de/	302	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		303	the response body.
246		304
247	http_request GET => "http://www.nethype.de/", sub {	305	http_request GET => "http://www.nethype.de/", sub {
248	my ($body, $hdr) = @_;	306	my ($body, $hdr) = @_;
249	print "$body\n";	307	print "$body\n";
250	};	308	};
251		309
252	Example: make a HTTP HEAD request on https://www.google.com/, use a	310	Example: do a HTTP HEAD request on https://www.google.com/, use a
253	timeout of 30 seconds.	311	timeout of 30 seconds.
254		312
255	http_request	313	http_request
256	GET => "https://www.google.com",	314	GET => "https://www.google.com",
257	timeout => 30,	315	timeout => 30,
…		…
260	use Data::Dumper;	318	use Data::Dumper;
261	print Dumper $hdr;	319	print Dumper $hdr;
262	}	320	}
263	;	321	;
264		322
265	Example: make another simple HTTP GET request, but immediately try to	323	Example: do another simple HTTP GET request, but immediately try to
266	cancel it.	324	cancel it.
267		325
268	my $request = http_request GET => "http://www.nethype.de/", sub {	326	my $request = http_request GET => "http://www.nethype.de/", sub {
269	my ($body, $hdr) = @_;	327	my ($body, $hdr) = @_;
270	print "$body\n";	328	print "$body\n";
…		…
302	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	360	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
303		361
304	_slot_schedule $_[0];	362	_slot_schedule $_[0];
305	}	363	}
306		364
307	our $qr_nl = qr<\015?\012>;	365	# continue to parse $_ for headers and place them into the arg
308	our $qr_nlnl = qr<\015?\012\015?\012>;	366	sub parse_hdr() {
		367	my %hdr;
		368
		369	# things seen, not parsed:
		370	# p3pP="NON CUR OTPi OUR NOR UNI"
		371
		372	$hdr{lc $1} .= ",$2"
		373	while /\G
		374	([^:\000-\037]*):
		375	[\011\040]*
		376	((?: [^\012]+ \| \012[\011\040] )*)
		377	\012
		378	/gxc;
		379
		380	/\G$/
		381	or return;
		382
		383	# remove the "," prefix we added to all headers above
		384	substr $_, 0, 1, ""
		385	for values %hdr;
		386
		387	\%hdr
		388	}
		389
		390	our $qr_nlnl = qr{(?<![^\012])\015?\012};
309		391
310	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	392	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
311	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	393	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
312		394
313	sub http_request($$@) {	395	sub http_request($$@) {
…		…
325	while (my ($k, $v) = each %$hdr) {	407	while (my ($k, $v) = each %$hdr) {
326	$hdr{lc $k} = $v;	408	$hdr{lc $k} = $v;
327	}	409	}
328	}	410	}
329		411
		412	# pseudo headers for all subsequent responses
		413	my @pseudo = (URL => $url);
		414	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		415
330	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	416	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
331		417
332	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })	418	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
333	if $recurse < 0;	419	if $recurse < 0;
334		420
335	my $proxy = $arg{proxy} \|\| $PROXY;	421	my $proxy = $arg{proxy} \|\| $PROXY;
336	my $timeout = $arg{timeout} \|\| $TIMEOUT;	422	my $timeout = $arg{timeout} \|\| $TIMEOUT;
337		423
338	my ($uscheme, $uauthority, $upath, $query, $fragment) =	424	my ($uscheme, $uauthority, $upath, $query, $fragment) =
339	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	425	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
340		426
341	$uscheme = lc $uscheme;	427	$uscheme = lc $uscheme;
342		428
343	my $uport = $uscheme eq "http" ? 80	429	my $uport = $uscheme eq "http" ? 80
344	: $uscheme eq "https" ? 443	430	: $uscheme eq "https" ? 443
345	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });	431	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
346		432
347	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	433	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
348	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });	434	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
349		435
350	my $uhost = $1;	436	my $uhost = $1;
351	$uport = $2 if defined $2;	437	$uport = $2 if defined $2;
352		438
		439	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		440	unless exists $hdr{host};
		441
353	$uhost =~ s/^\[(.*)\]$/$1/;	442	$uhost =~ s/^\[(.*)\]$/$1/;
354	$upath .= "?$query" if length $query;	443	$upath .= $query if length $query;
355		444
356	$upath =~ s%^/?%/%;	445	$upath =~ s%^/?%/%;
357		446
358	# cookie processing	447	# cookie processing
359	if (my $jar = $arg{cookie_jar}) {	448	if (my $jar = $arg{cookie_jar}) {
…		…
389	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path	478	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
390		479
391	if ($proxy) {	480	if ($proxy) {
392	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);	481	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
393		482
		483	$rscheme = "http" unless defined $rscheme;
		484
394	# don't support https requests over https-proxy transport,	485	# don't support https requests over https-proxy transport,
395	# can't be done with tls as spec'ed, unless you double-encrypt.	486	# can't be done with tls as spec'ed, unless you double-encrypt.
396	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	487	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
397	} else {	488	} else {
398	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	489	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
399	}	490	}
400		491
401	$hdr{"user-agent"} \|\|= $USERAGENT;	492	# leave out fragment and query string, just a heuristic
402	$hdr{referer} \|\|= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic	493	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		494	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
403		495
404	$hdr{host} = "$uhost:$uport";
405	$hdr{"content-length"} = length $arg{body};	496	$hdr{"content-length"} = length $arg{body}
		497	if length $arg{body} \|\| $method ne "GET";
		498
		499	$hdr{connection} = "close TE"; #1.1
		500	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
406		501
407	my %state = (connect_guard => 1);	502	my %state = (connect_guard => 1);
408		503
409	_get_slot $uhost, sub {	504	_get_slot $uhost, sub {
410	$state{slot_guard} = shift;	505	$state{slot_guard} = shift;
411		506
412	return unless $state{connect_guard};	507	return unless $state{connect_guard};
413		508
414	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	509	my $connect_cb = sub {
415	$state{fh} = shift	510	$state{fh} = shift
416	or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url }));	511	or do {
		512	my $err = "$!";
		513	%state = ();
		514	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
		515	};
		516
417	pop; # free memory, save a tree	517	pop; # free memory, save a tree
418		518
419	return unless delete $state{connect_guard};	519	return unless delete $state{connect_guard};
420		520
421	# get handle	521	# get handle
422	$state{handle} = new AnyEvent::Handle	522	$state{handle} = new AnyEvent::Handle
423	fh => $state{fh},	523	fh => $state{fh},
		524	peername => $rhost,
		525	tls_ctx => $arg{tls_ctx},
		526	# these need to be reconfigured on keepalive handles
424	timeout => $timeout,	527	timeout => $timeout,
425	peername => $rhost,	528	on_error => sub {
426	tls_ctx => $arg{tls_ctx};	529	%state = ();
		530	$cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
		531	},
		532	on_eof => sub {
		533	%state = ();
		534	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
		535	},
		536	;
427		537
428	# limit the number of persistent connections	538	# limit the number of persistent connections
429	# keepalive not yet supported	539	# keepalive not yet supported
430	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	540	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
431	++$KA_COUNT{$_[1]};	541	# ++$KA_COUNT{$_[1]};
432	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {	542	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
433	--$KA_COUNT{$_[1]}	543	# --$KA_COUNT{$_[1]}
434	};	544	# };
435	$hdr{connection} = "keep-alive";	545	# $hdr{connection} = "keep-alive";
436	} else {
437	delete $hdr{connection};
438	}	546	# }
439
440	# (re-)configure handle
441	$state{handle}->on_error (sub {
442	%state = ();
443	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
444	});
445	$state{handle}->on_eof (sub {
446	%state = ();
447	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
448	});
449		547
450	$state{handle}->starttls ("connect") if $rscheme eq "https";	548	$state{handle}->starttls ("connect") if $rscheme eq "https";
451		549
452	# handle actual, non-tunneled, request	550	# handle actual, non-tunneled, request
453	my $handle_actual_request = sub {	551	my $handle_actual_request = sub {
454	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};	552	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
455		553
456	# send request	554	# send request
457	$state{handle}->push_write (	555	$state{handle}->push_write (
458	"$method $rpath HTTP/1.0\015\012"	556	"$method $rpath HTTP/1.1\015\012"
459	. (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)	557	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
460	. "\015\012"	558	. "\015\012"
461	. (delete $arg{body})	559	. (delete $arg{body})
462	);	560	);
463		561
		562	# return if error occured during push_write()
		563	return unless %state;
		564
464	%hdr = (); # reduce memory usage, save a kitten	565	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
465		566
466	# status line	567	# status line and headers
467	$state{handle}->push_read (line => $qr_nl, sub {	568	$state{read_response} = sub {
468	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
469	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
470
471	my %hdr = ( # response headers
472	HTTPVersion => ",$1",
473	Status => ",$2",
474	Reason => ",$3",
475	URL => ",$url"
476	);
477
478	# headers, could be optimized a bit
479	$state{handle}->unshift_read (line => $qr_nlnl, sub {
480	for ("$_[1]\012") {	569	for ("$_[1]") {
481	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	570	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
482		571
483	# things seen, not parsed:	572	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc
484	# p3pP="NON CUR OTPi OUR NOR UNI"	573	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
485		574
486	$hdr{lc $1} .= ",$2"	575	# 100 Continue handling
487	while /\G	576	# should not happen as we don't send expect: 100-continue,
488	([^:\000-\037]+):	577	# but we handle it just in case.
489	[\011\040]*	578	# since we send the request body regardless, if we get an error
490	((?: [^\012]+ \| \012[\011\040] )*)	579	# we are out of-sync, which we currently do NOT handle correctly.
491	\012	580	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
492	/gxc;	581	if $2 eq 100;
493		582
		583	push @pseudo,
		584	HTTPVersion => $1,
		585	Status => $2,
		586	Reason => $3,
494	/\G$/	587	;
		588
		589	my $hdr = parse_hdr
495	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));	590	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
		591
		592	%hdr = (%$hdr, @pseudo);
		593	}
		594
		595	# redirect handling
		596	# microsoft and other shitheads don't give a shit for following standards,
		597	# try to support some common forms of broken Location headers.
		598	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		599	$hdr{location} =~ s/^\.\/+//;
		600
		601	my $url = "$rscheme://$uhost:$uport";
		602
		603	unless ($hdr{location} =~ s/^\///) {
		604	$url .= $upath;
		605	$url =~ s/\/[^\/]*$//;
496	}	606	}
497		607
498	substr $_, 0, 1, ""
499	for values %hdr;
500
501	# redirect handling
502	# microsoft and other shitheads don't give a shit for following standards,
503	# try to support some common forms of broken Location headers.
504	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
505	$hdr{location} =~ s/^\.\/+//;
506
507	my $url = "$rscheme://$uhost:$uport";
508
509	unless ($hdr{location} =~ s/^\///) {
510	$url .= $upath;
511	$url =~ s/\/[^\/]*$//;
512	}
513
514	$hdr{location} = "$url/$hdr{location}";	608	$hdr{location} = "$url/$hdr{location}";
		609	}
		610
		611	my $redirect;
		612
		613	if ($recurse) {
		614	my $status = $hdr{Status};
		615
		616	# industry standard is to redirect POST as GET for
		617	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
		618	# also, the UA should ask the user for 301 and 307 and POST,
		619	# industry standard seems to be to simply follow.
		620	# we go with the industry standard.
		621	if ($status == 301 or $status == 302 or $status == 303) {
		622	# HTTP/1.1 is unclear on how to mutate the method
		623	$method = "GET" unless $method eq "HEAD";
		624	$redirect = 1;
		625	} elsif ($status == 307) {
		626	$redirect = 1;
515	}	627	}
		628	}
516		629
		630	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
517	my $redirect;	631	my $keepalive = pop;
518		632
		633	$state{handle}->destroy if $state{handle};
		634	%state = ();
		635
		636	if (defined $_[1]) {
		637	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		638	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		639	}
		640
		641	# set-cookie processing
519	if ($recurse) {	642	if ($arg{cookie_jar}) {
520	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {	643	for ($hdr{"set-cookie"}) {
521	# apparently, mozilla et al. just change POST to GET here	644	# parse NAME=VALUE
522	# more research is needed before we do the same	645	my @kv;
		646
		647	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
523	$redirect = 1;	648	my $name = $1;
524	} elsif ($hdr{Status} == 303) {	649	my $value = $3;
525	# even http/1.1 is unclear on how to mutate the method	650
526	$method = "GET" unless $method eq "HEAD";	651	unless ($value) {
		652	$value = $2;
		653	$value =~ s/\\(.)/$1/gs;
		654	}
		655
		656	push @kv, $name => $value;
		657
		658	last unless /\G\s*;/gc;
		659	}
		660
		661	last unless @kv;
		662
		663	my $name = shift @kv;
		664	my %kv = (value => shift @kv, @kv);
		665
		666	my $cdom;
		667	my $cpath = (delete $kv{path}) \|\| "/";
		668
		669	if (exists $kv{domain}) {
		670	$cdom = delete $kv{domain};
		671
		672	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		673
		674	next if $cdom =~ /\.$/;
		675
		676	# this is not rfc-like and not netscape-like. go figure.
		677	my $ndots = $cdom =~ y/.//;
		678	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		679	} else {
		680	$cdom = $uhost;
		681	}
		682
527	$redirect = 1;	683	# store it
528	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET\|HEAD)$/) {	684	$arg{cookie_jar}{version} = 1;
529	$redirect = 1;	685	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		686
		687	redo if /\G\s*,/gc;
530	}	688	}
531	}	689	}
532		690
533	my $finish = sub {	691	if ($redirect && exists $hdr{location}) {
534	$state{handle}->destroy if $state{handle};
535	%state = ();
536
537	# set-cookie processing
538	if ($arg{cookie_jar}) {
539	for ($_[1]{"set-cookie"}) {
540	# parse NAME=VALUE
541	my @kv;
542
543	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
544	my $name = $1;
545	my $value = $3;
546
547	unless ($value) {
548	$value = $2;
549	$value =~ s/\\(.)/$1/gs;
550	}
551
552	push @kv, $name => $value;
553
554	last unless /\G\s*;/gc;
555	}
556
557	last unless @kv;
558
559	my $name = shift @kv;
560	my %kv = (value => shift @kv, @kv);
561
562	my $cdom;
563	my $cpath = (delete $kv{path}) \|\| "/";
564
565	if (exists $kv{domain}) {
566	$cdom = delete $kv{domain};
567
568	$cdom =~ s/^\.?/./; # make sure it starts with a "."
569
570	next if $cdom =~ /\.$/;
571
572	# this is not rfc-like and not netscape-like. go figure.
573	my $ndots = $cdom =~ y/.//;
574	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
575	} else {
576	$cdom = $uhost;
577	}
578
579	# store it
580	$arg{cookie_jar}{version} = 1;
581	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
582
583	redo if /\G\s*,/gc;
584	}
585	}
586
587	if ($redirect) {
588	# we ignore any errors, as it is very common to receive	692	# we ignore any errors, as it is very common to receive
589	# Content-Length != 0 but no actual body	693	# Content-Length != 0 but no actual body
590	# we also access %hdr, as $_[1] might be an erro	694	# we also access %hdr, as $_[1] might be an erro
591	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);	695	http_request (
592	} else {	696	$method => $hdr{location},
593	$cb->($_[0], $_[1]);
594	}	697	%arg,
		698	recurse => $recurse - 1,
		699	Redirect => [$_[0], \%hdr],
595	};	700	$cb);
596
597	my $len = $hdr{"content-length"};
598
599	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
600	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
601	} elsif (
602	$hdr{Status} =~ /^(?:1..\|204\|304)$/
603	or $method eq "HEAD"
604	or (defined $len && !$len)
605	) {
606	# no body
607	$finish->("", \%hdr);
608	} else {	701	} else {
		702	$cb->($_[0], \%hdr);
		703	}
		704	};
		705
		706	my $len = $hdr{"content-length"};
		707
		708	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		709	$finish->(undef, 598 => "Request cancelled by on_header");
		710	} elsif (
		711	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		712	or $method eq "HEAD"
		713	or (defined $len && !$len)
		714	) {
		715	# no body
		716	$finish->("", undef, undef, 1);
		717	} else {
609	# body handling, four different code paths	718	# body handling, many different code paths
610	# for want_body_handle, on_body (2x), normal (2x)	719	# - no body expected
611	# we might read too much here, but it does not matter yet (no pers. connections)	720	# - want_body_handle
		721	# - te chunked
		722	# - 2x length known (with or without on_body)
		723	# - 2x length not known (with or without on_body)
612	if (!$redirect && $arg{want_body_handle}) {	724	if (!$redirect && $arg{want_body_handle}) {
613	$_[0]->on_eof (undef);	725	$_[0]->on_eof (undef);
614	$_[0]->on_error (undef);	726	$_[0]->on_error (undef);
615	$_[0]->on_read (undef);	727	$_[0]->on_read (undef);
616		728
617	$finish->(delete $state{handle}, \%hdr);	729	$finish->(delete $state{handle});
618		730
619	} elsif ($arg{on_body}) {	731	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
		732	my $cl = 0;
		733	my $body = undef;
		734	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		735
620	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });	736	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		737
		738	my $read_chunk; $read_chunk = sub {
		739	$_[1] =~ /^([0-9a-fA-F]+)/
		740	or $finish->(undef, 599 => "Garbled chunked transfer encoding");
		741
		742	my $len = hex $1;
		743
621	if ($len) {	744	if ($len) {
622	$_[0]->on_eof (undef);	745	$cl += $len;
		746
		747	$_[0]->push_read (chunk => $len, sub {
		748	$on_body->($_[1], \%hdr)
		749	or return $finish->(undef, 598 => "Request cancelled by on_body");
		750
623	$_[0]->on_read (sub {	751	$_[0]->push_read (line => sub {
624	$len -= length $_[0]{rbuf};	752	length $_[1]
625		753	and return $finish->(undef, 599 => "Garbled chunked transfer encoding");
626	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)	754	$_[0]->push_read (line => $read_chunk);
627	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
628
629	$len > 0	755	});
630	or $finish->("", \%hdr);
631	});	756	});
632	} else {	757	} else {
633	$_[0]->on_eof (sub {	758	$hdr{"content-length"} \|\|= $cl;
634	$finish->("", \%hdr);	759
		760	$_[0]->push_read (line => $qr_nlnl, sub {
		761	if (length $_[1]) {
		762	for ("$_[1]") {
		763	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		764
		765	my $hdr = parse_hdr
		766	or return $finish->(undef, 599 => "Garbled response trailers");
		767
		768	%hdr = (%hdr, %$hdr);
		769	}
635	});	770	}
636	$_[0]->on_read (sub {	771
637	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)	772	$finish->($body, undef, undef, 1);
638	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
639	});	773	});
640	}	774	}
		775	};
		776
		777	$_[0]->push_read (line => $read_chunk);
		778
		779	} elsif ($arg{on_body}) {
		780	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		781
		782	if ($len) {
		783	$_[0]->on_read (sub {
		784	$len -= length $_[0]{rbuf};
		785
		786	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		787	or return $finish->(undef, 598 => "Request cancelled by on_body");
		788
		789	$len > 0
		790	or $finish->("", undef, undef, 1);
		791	});
641	} else {	792	} else {
642	$_[0]->on_eof (undef);	793	$_[0]->on_eof (sub {
643		794	$finish->("");
644	if ($len) {	795	});
645	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
646	$_[0]->on_read (sub {	796	$_[0]->on_read (sub {
		797	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		798	or $finish->(undef, 598 => "Request cancelled by on_body");
		799	});
		800	}
		801	} else {
		802	$_[0]->on_eof (undef);
		803
		804	if ($len) {
		805	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		806	$_[0]->on_read (sub {
647	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)	807	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
648	if $len <= length $_[0]{rbuf};	808	if $len <= length $_[0]{rbuf};
649	});	809	});
650	} else {	810	} else {
651	$_[0]->on_error (sub {	811	$_[0]->on_error (sub {
652	$! == Errno::EPIPE	812	($! == Errno::EPIPE \|\| !$!)
653	? $finish->(delete $_[0]{rbuf}, \%hdr)	813	? $finish->(delete $_[0]{rbuf})
654	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });	814	: $finish->(undef, 599 => $_[2]);
655	});	815	});
656	$_[0]->on_read (sub { });	816	$_[0]->on_read (sub { });
657	}
658	}	817	}
659	}	818	}
660	});	819	}
661	});	820	};
		821
		822	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
662	};	823	};
663		824
664	# now handle proxy-CONNECT method	825	# now handle proxy-CONNECT method
665	if ($proxy && $uscheme eq "https") {	826	if ($proxy && $uscheme eq "https") {
666	# oh dear, we have to wrap it into a connect request	827	# oh dear, we have to wrap it into a connect request
667		828
668	# maybe re-use $uauthority with patched port?	829	# maybe re-use $uauthority with patched port?
669	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");	830	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
670	$state{handle}->push_read (line => $qr_nlnl, sub {	831	$state{handle}->push_read (line => $qr_nlnl, sub {
671	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix	832	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
672	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));	833	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
673		834
674	if ($2 == 200) {	835	if ($2 == 200) {
675	$rpath = $upath;	836	$rpath = $upath;
676	&$handle_actual_request;	837	&$handle_actual_request;
677	} else {	838	} else {
678	%state = ();	839	%state = ();
679	$cb->(undef, { Status => $2, Reason => $3, URL => $url });	840	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
680	}	841	}
681	});	842	});
682	} else {	843	} else {
683	&$handle_actual_request;	844	&$handle_actual_request;
684	}	845	}
685
686	}, sub {
687	$timeout
688	};	846	};
		847
		848	my $tcp_connect = $arg{tcp_connect}
		849	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		850
		851	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		852
689	};	853	};
690		854
691	defined wantarray && AnyEvent::Util::guard { %state = () }	855	defined wantarray && AnyEvent::Util::guard { %state = () }
692	}	856	}
693		857
…		…
707	&http_request	871	&http_request
708	}	872	}
709		873
710	=back	874	=back
711		875
		876	=head2 DNS CACHING
		877
		878	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		879	the actual connection, which in turn uses AnyEvent::DNS to resolve
		880	hostnames. The latter is a simple stub resolver and does no caching
		881	on its own. If you want DNS caching, you currently have to provide
		882	your own default resolver (by storing a suitable resolver object in
		883	C<$AnyEvent::DNS::RESOLVER>).
		884
712	=head2 GLOBAL FUNCTIONS AND VARIABLES	885	=head2 GLOBAL FUNCTIONS AND VARIABLES
713		886
714	=over 4	887	=over 4
715		888
716	=item AnyEvent::HTTP::set_proxy "proxy-url"	889	=item AnyEvent::HTTP::set_proxy "proxy-url"
717		890
718	Sets the default proxy server to use. The proxy-url must begin with a	891	Sets the default proxy server to use. The proxy-url must begin with a
719	string of the form C<http://host:port> (optionally C<https:...>).	892	string of the form C<http://host:port> (optionally C<https:...>), croaks
		893	otherwise.
		894
		895	To clear an already-set proxy, use C<undef>.
		896
		897	=item $date = AnyEvent::HTTP::format_date $timestamp
		898
		899	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		900	Date (RFC 2616).
		901
		902	=item $timestamp = AnyEvent::HTTP::parse_date $date
		903
		904	Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX
		905	timestamp, or C<undef> if the date cannot be parsed.
720		906
721	=item $AnyEvent::HTTP::MAX_RECURSE	907	=item $AnyEvent::HTTP::MAX_RECURSE
722		908
723	The default value for the C<recurse> request parameter (default: C<10>).	909	The default value for the C<recurse> request parameter (default: C<10>).
724		910
725	=item $AnyEvent::HTTP::USERAGENT	911	=item $AnyEvent::HTTP::USERAGENT
726		912
727	The default value for the C<User-Agent> header (the default is	913	The default value for the C<User-Agent> header (the default is
728	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	914	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
729		915
730	=item $AnyEvent::HTTP::MAX_PERSISTENT	916	=item $AnyEvent::HTTP::MAX_PER_HOST
731		917
732	The maximum number of persistent connections to keep open (default: 8).	918	The maximum number of concurrent connections to the same host (identified
		919	by the hostname). If the limit is exceeded, then the additional requests
		920	are queued until previous connections are closed.
733		921
734	Not implemented currently.	922	The default value for this is C<4>, and it is highly advisable to not
735		923	increase it.
736	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
737
738	The maximum time to cache a persistent connection, in seconds (default: 2).
739
740	Not implemented currently.
741		924
742	=item $AnyEvent::HTTP::ACTIVE	925	=item $AnyEvent::HTTP::ACTIVE
743		926
744	The number of active connections. This is not the number of currently	927	The number of active connections. This is not the number of currently
745	running requests, but the number of currently open and non-idle TCP	928	running requests, but the number of currently open and non-idle TCP
…		…
747		930
748	=back	931	=back
749		932
750	=cut	933	=cut
751		934
		935	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		936	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		937
		938	sub format_date($) {
		939	my ($time) = @_;
		940
		941	# RFC 822/1123 format
		942	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		943
		944	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		945	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		946	$H, $M, $S;
		947	}
		948
		949	sub parse_date($) {
		950	my ($date) = @_;
		951
		952	my ($d, $m, $y, $H, $M, $S);
		953
		954	if ($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$/) {
		955	# RFC 822/1123, required by RFC 2616
		956	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		957
		958	} elsif ($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$/) {
		959	# RFC 850
		960	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		961
		962	} elsif ($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])$/) {
		963	# ISO C's asctime
		964	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		965	}
		966	# other formats fail in the loop below
		967
		968	for (0..11) {
		969	if ($m eq $month[$_]) {
		970	require Time::Local;
		971	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		972	}
		973	}
		974
		975	undef
		976	}
		977
752	sub set_proxy($) {	978	sub set_proxy($) {
		979	if (length $_[0]) {
753	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	980	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		981	or Carp::croak "$_[0]: invalid proxy URL";
		982	$PROXY = [$2, $3 \|\| 3128, $1]
		983	} else {
		984	undef $PROXY;
		985	}
754	}	986	}
755		987
756	# initialise proxy from environment	988	# initialise proxy from environment
		989	eval {
757	set_proxy $ENV{http_proxy};	990	set_proxy $ENV{http_proxy};
		991	};
		992
		993	=head2 SOCKS PROXIES
		994
		995	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		996	compile your perl to support socks, or use an external program such as
		997	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		998	transparently.
		999
		1000	Alternatively, for AnyEvent::HTTP only, you can use your own
		1001	C<tcp_connect> function that does the proxy handshake - here is an example
		1002	that works with socks4a proxies:
		1003
		1004	use Errno;
		1005	use AnyEvent::Util;
		1006	use AnyEvent::Socket;
		1007	use AnyEvent::Handle;
		1008
		1009	# host, port and username of/for your socks4a proxy
		1010	my $socks_host = "10.0.0.23";
		1011	my $socks_port = 9050;
		1012	my $socks_user = "";
		1013
		1014	sub socks4a_connect {
		1015	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		1016
		1017	my $hdl = new AnyEvent::Handle
		1018	connect => [$socks_host, $socks_port],
		1019	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1020	on_error => sub { $connect_cb->() },
		1021	;
		1022
		1023	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1024
		1025	$hdl->push_read (chunk => 8, sub {
		1026	my ($hdl, $chunk) = @_;
		1027	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1028
		1029	if ($status == 0x5a) {
		1030	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1031	} else {
		1032	$! = Errno::ENXIO; $connect_cb->();
		1033	}
		1034	});
		1035
		1036	$hdl
		1037	}
		1038
		1039	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1040	possibly after switching off other proxy types:
		1041
		1042	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1043
		1044	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1045	my ($data, $headers) = @_;
		1046	...
		1047	};
758		1048
759	=head1 SEE ALSO	1049	=head1 SEE ALSO
760		1050
761	L<AnyEvent>.	1051	L<AnyEvent>.
762		1052

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.41 by root, Sun Jul 5 23:50:59 2009 UTC vs. Revision 1.68 by root, Fri Dec 31 19:22:18 2010 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.41 by root, Sun Jul 5 23:50:59 2009 UTC vs.
Revision 1.68 by root, Fri Dec 31 19:22:18 2010 UTC