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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.42 by root, Mon Jul 6 00:08:16 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 body data as first argument	98	The callback will be called with the response body data as first argument
100	(or C<undef> if an error occured), and a hash-ref with response headers as	99	(or C<undef> if an error occured), and a hash-ref with response headers
101	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 => $callback->($headers)	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).
…		…
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
205	Example: cancel the request unless the content-type is "text/html".	249	Example: cancel the request unless the content-type is "text/html".
206		250
207	on_header => sub {	251	on_header => sub {
208	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/	252	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
209	},	253	},
…		…
216		260
217	It has to return either true (in which case AnyEvent::HTTP will continue),	261	It has to return either true (in which case AnyEvent::HTTP will continue),
218	or false, in which case AnyEvent::HTTP will cancel the download (and call	262	or false, in which case AnyEvent::HTTP will cancel the download (and call
219	the completion callback with an error code of C<598>).	263	the completion callback with an error code of C<598>).
220		264
		265	The downside to cancelling the request is that it makes it impossible to
		266	re-use the connection.
		267
221	This callback is useful when the data is too large to be held in memory	268	This callback is useful when the data is too large to be held in memory
222	(so the callback writes it to a file) or when only some information should	269	(so the callback writes it to a file) or when only some information should
223	be extracted, or when the body should be processed incrementally.	270	be extracted, or when the body should be processed incrementally.
224		271
225	It is usually preferred over doing your own body handling via	272	It is usually preferred over doing your own body handling via
226	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.
227		277
228	=item want_body_handle => $enable	278	=item want_body_handle => $enable
229		279
230	When enabled (default is disabled), the behaviour of AnyEvent::HTTP	280	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
231	changes considerably: after parsing the headers, and instead of	281	changes considerably: after parsing the headers, and instead of
…		…
243	This is useful with some push-type services, where, after the initial	293	This is useful with some push-type services, where, after the initial
244	headers, an interactive protocol is used (typical example would be the	294	headers, an interactive protocol is used (typical example would be the
245	push-style twitter API which starts a JSON/XML stream).	295	push-style twitter API which starts a JSON/XML stream).
246		296
247	If you think you need this, first have a look at C<on_body>, to see if	297	If you think you need this, first have a look at C<on_body>, to see if
248	that doesn'T solve your problem in a better way.	298	that doesn't solve your problem in a better way.
249		299
250	=back	300	=back
251		301
252	Example: make a simple HTTP GET request for http://www.nethype.de/	302	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		303	the response body.
253		304
254	http_request GET => "http://www.nethype.de/", sub {	305	http_request GET => "http://www.nethype.de/", sub {
255	my ($body, $hdr) = @_;	306	my ($body, $hdr) = @_;
256	print "$body\n";	307	print "$body\n";
257	};	308	};
258		309
259	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
260	timeout of 30 seconds.	311	timeout of 30 seconds.
261		312
262	http_request	313	http_request
263	GET => "https://www.google.com",	314	GET => "https://www.google.com",
264	timeout => 30,	315	timeout => 30,
…		…
267	use Data::Dumper;	318	use Data::Dumper;
268	print Dumper $hdr;	319	print Dumper $hdr;
269	}	320	}
270	;	321	;
271		322
272	Example: make another simple HTTP GET request, but immediately try to	323	Example: do another simple HTTP GET request, but immediately try to
273	cancel it.	324	cancel it.
274		325
275	my $request = http_request GET => "http://www.nethype.de/", sub {	326	my $request = http_request GET => "http://www.nethype.de/", sub {
276	my ($body, $hdr) = @_;	327	my ($body, $hdr) = @_;
277	print "$body\n";	328	print "$body\n";
…		…
309	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	360	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
310		361
311	_slot_schedule $_[0];	362	_slot_schedule $_[0];
312	}	363	}
313		364
314	our $qr_nl = qr<\015?\012>;	365	# continue to parse $_ for headers and place them into the arg
315	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};
316		391
317	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	392	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
318	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	393	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
319		394
320	sub http_request($$@) {	395	sub http_request($$@) {
…		…
332	while (my ($k, $v) = each %$hdr) {	407	while (my ($k, $v) = each %$hdr) {
333	$hdr{lc $k} = $v;	408	$hdr{lc $k} = $v;
334	}	409	}
335	}	410	}
336		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
337	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	416	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
338		417
339	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })	418	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
340	if $recurse < 0;	419	if $recurse < 0;
341		420
342	my $proxy = $arg{proxy} \|\| $PROXY;	421	my $proxy = $arg{proxy} \|\| $PROXY;
343	my $timeout = $arg{timeout} \|\| $TIMEOUT;	422	my $timeout = $arg{timeout} \|\| $TIMEOUT;
344		423
345	my ($uscheme, $uauthority, $upath, $query, $fragment) =	424	my ($uscheme, $uauthority, $upath, $query, $fragment) =
346	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	425	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
347		426
348	$uscheme = lc $uscheme;	427	$uscheme = lc $uscheme;
349		428
350	my $uport = $uscheme eq "http" ? 80	429	my $uport = $uscheme eq "http" ? 80
351	: $uscheme eq "https" ? 443	430	: $uscheme eq "https" ? 443
352	: 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" });
353		432
354	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	433	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
355	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });	434	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
356		435
357	my $uhost = $1;	436	my $uhost = $1;
358	$uport = $2 if defined $2;	437	$uport = $2 if defined $2;
359		438
		439	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		440	unless exists $hdr{host};
		441
360	$uhost =~ s/^\[(.*)\]$/$1/;	442	$uhost =~ s/^\[(.*)\]$/$1/;
361	$upath .= "?$query" if length $query;	443	$upath .= $query if length $query;
362		444
363	$upath =~ s%^/?%/%;	445	$upath =~ s%^/?%/%;
364		446
365	# cookie processing	447	# cookie processing
366	if (my $jar = $arg{cookie_jar}) {	448	if (my $jar = $arg{cookie_jar}) {
…		…
396	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path	478	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
397		479
398	if ($proxy) {	480	if ($proxy) {
399	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);	481	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
400		482
		483	$rscheme = "http" unless defined $rscheme;
		484
401	# don't support https requests over https-proxy transport,	485	# don't support https requests over https-proxy transport,
402	# 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.
403	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	487	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
404	} else {	488	} else {
405	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	489	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
406	}	490	}
407		491
408	$hdr{"user-agent"} \|\|= $USERAGENT;	492	# leave out fragment and query string, just a heuristic
409	$hdr{referer} \|\|= "$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"};
410		495
411	$hdr{host} = "$uhost:$uport";
412	$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
413		501
414	my %state = (connect_guard => 1);	502	my %state = (connect_guard => 1);
415		503
416	_get_slot $uhost, sub {	504	_get_slot $uhost, sub {
417	$state{slot_guard} = shift;	505	$state{slot_guard} = shift;
418		506
419	return unless $state{connect_guard};	507	return unless $state{connect_guard};
420		508
421	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	509	my $connect_cb = sub {
422	$state{fh} = shift	510	$state{fh} = shift
423	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
424	pop; # free memory, save a tree	517	pop; # free memory, save a tree
425		518
426	return unless delete $state{connect_guard};	519	return unless delete $state{connect_guard};
427		520
428	# get handle	521	# get handle
429	$state{handle} = new AnyEvent::Handle	522	$state{handle} = new AnyEvent::Handle
430	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
431	timeout => $timeout,	527	timeout => $timeout,
432	peername => $rhost,	528	on_error => sub {
433	tls_ctx => $arg{tls_ctx};	529	%state = ();
		530	$cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
		531	},
		532	on_eof => sub {
		533	%state = ();
		534	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
		535	},
		536	;
434		537
435	# limit the number of persistent connections	538	# limit the number of persistent connections
436	# keepalive not yet supported	539	# keepalive not yet supported
437	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	540	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
438	++$KA_COUNT{$_[1]};	541	# ++$KA_COUNT{$_[1]};
439	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {	542	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
440	--$KA_COUNT{$_[1]}	543	# --$KA_COUNT{$_[1]}
441	};	544	# };
442	$hdr{connection} = "keep-alive";	545	# $hdr{connection} = "keep-alive";
443	} else {
444	delete $hdr{connection};
445	}	546	# }
446
447	# (re-)configure handle
448	$state{handle}->on_error (sub {
449	%state = ();
450	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
451	});
452	$state{handle}->on_eof (sub {
453	%state = ();
454	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
455	});
456		547
457	$state{handle}->starttls ("connect") if $rscheme eq "https";	548	$state{handle}->starttls ("connect") if $rscheme eq "https";
458		549
459	# handle actual, non-tunneled, request	550	# handle actual, non-tunneled, request
460	my $handle_actual_request = sub {	551	my $handle_actual_request = sub {
461	$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};
462		553
463	# send request	554	# send request
464	$state{handle}->push_write (	555	$state{handle}->push_write (
465	"$method $rpath HTTP/1.0\015\012"	556	"$method $rpath HTTP/1.1\015\012"
466	. (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)	557	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
467	. "\015\012"	558	. "\015\012"
468	. (delete $arg{body})	559	. (delete $arg{body})
469	);	560	);
470		561
		562	# return if error occured during push_write()
		563	return unless %state;
		564
471	%hdr = (); # reduce memory usage, save a kitten	565	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
472		566
473	# status line	567	# status line and headers
474	$state{handle}->push_read (line => $qr_nl, sub {	568	$state{read_response} = sub {
475	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
476	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
477
478	my %hdr = ( # response headers
479	HTTPVersion => ",$1",
480	Status => ",$2",
481	Reason => ",$3",
482	URL => ",$url"
483	);
484
485	# headers, could be optimized a bit
486	$state{handle}->unshift_read (line => $qr_nlnl, sub {
487	for ("$_[1]\012") {	569	for ("$_[1]") {
488	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.
489		571
490	# things seen, not parsed:	572	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc
491	# p3pP="NON CUR OTPi OUR NOR UNI"	573	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
492		574
493	$hdr{lc $1} .= ",$2"	575	# 100 Continue handling
494	while /\G	576	# should not happen as we don't send expect: 100-continue,
495	([^:\000-\037]+):	577	# but we handle it just in case.
496	[\011\040]*	578	# since we send the request body regardless, if we get an error
497	((?: [^\012]+ \| \012[\011\040] )*)	579	# we are out of-sync, which we currently do NOT handle correctly.
498	\012	580	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
499	/gxc;	581	if $2 eq 100;
500		582
		583	push @pseudo,
		584	HTTPVersion => $1,
		585	Status => $2,
		586	Reason => $3,
501	/\G$/	587	;
		588
		589	my $hdr = parse_hdr
502	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	$url =~ s/\/[^\/]*$//;
503	}	606	}
504		607
505	substr $_, 0, 1, ""
506	for values %hdr;
507
508	# redirect handling
509	# microsoft and other shitheads don't give a shit for following standards,
510	# try to support some common forms of broken Location headers.
511	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
512	$hdr{location} =~ s/^\.\/+//;
513
514	my $url = "$rscheme://$uhost:$uport";
515
516	unless ($hdr{location} =~ s/^\///) {
517	$url .= $upath;
518	$url =~ s/\/[^\/]*$//;
519	}
520
521	$hdr{location} = "$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;
522	}	627	}
		628	}
523		629
		630	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
524	my $redirect;	631	my $keepalive = pop;
525		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} = $_[2];
		639	}
		640
		641	# set-cookie processing
526	if ($recurse) {	642	if ($arg{cookie_jar}) {
527	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {	643	for ($hdr{"set-cookie"}) {
528	# apparently, mozilla et al. just change POST to GET here	644	# parse NAME=VALUE
529	# more research is needed before we do the same	645	my @kv;
		646
		647	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
530	$redirect = 1;	648	my $name = $1;
531	} elsif ($hdr{Status} == 303) {	649	my $value = $3;
532	# even http/1.1 is unclear on how to mutate the method	650
533	$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
534	$redirect = 1;	683	# store it
535	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET\|HEAD)$/) {	684	$arg{cookie_jar}{version} = 1;
536	$redirect = 1;	685	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		686
		687	redo if /\G\s*,/gc;
537	}	688	}
538	}	689	}
539		690
540	my $finish = sub {	691	if ($redirect && exists $hdr{location}) {
541	$state{handle}->destroy if $state{handle};
542	%state = ();
543
544	# set-cookie processing
545	if ($arg{cookie_jar}) {
546	for ($_[1]{"set-cookie"}) {
547	# parse NAME=VALUE
548	my @kv;
549
550	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
551	my $name = $1;
552	my $value = $3;
553
554	unless ($value) {
555	$value = $2;
556	$value =~ s/\\(.)/$1/gs;
557	}
558
559	push @kv, $name => $value;
560
561	last unless /\G\s*;/gc;
562	}
563
564	last unless @kv;
565
566	my $name = shift @kv;
567	my %kv = (value => shift @kv, @kv);
568
569	my $cdom;
570	my $cpath = (delete $kv{path}) \|\| "/";
571
572	if (exists $kv{domain}) {
573	$cdom = delete $kv{domain};
574
575	$cdom =~ s/^\.?/./; # make sure it starts with a "."
576
577	next if $cdom =~ /\.$/;
578
579	# this is not rfc-like and not netscape-like. go figure.
580	my $ndots = $cdom =~ y/.//;
581	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
582	} else {
583	$cdom = $uhost;
584	}
585
586	# store it
587	$arg{cookie_jar}{version} = 1;
588	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
589
590	redo if /\G\s*,/gc;
591	}
592	}
593
594	if ($redirect) {
595	# we ignore any errors, as it is very common to receive	692	# we ignore any errors, as it is very common to receive
596	# Content-Length != 0 but no actual body	693	# Content-Length != 0 but no actual body
597	# we also access %hdr, as $_[1] might be an erro	694	# we also access %hdr, as $_[1] might be an erro
598	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);	695	http_request (
599	} else {	696	$method => $hdr{location},
600	$cb->($_[0], $_[1]);
601	}	697	%arg,
		698	recurse => $recurse - 1,
		699	Redirect => [$_[0], \%hdr],
602	};	700	$cb);
603
604	my $len = $hdr{"content-length"};
605
606	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
607	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
608	} elsif (
609	$hdr{Status} =~ /^(?:1..\|[23]04)$/
610	or $method eq "HEAD"
611	or (defined $len && !$len)
612	) {
613	# no body
614	$finish->("", \%hdr);
615	} 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	$finish->("", undef, undef, 1);
		717	} else {
616	# body handling, four different code paths	718	# body handling, many different code paths
617	# for want_body_handle, on_body (2x), normal (2x)	719	# - no body expected
618	# we might read too much here, but it does not matter yet (no pers. connections)	720	# - want_body_handle
		721	# - te chunked
		722	# - 2x length known (with or without on_body)
		723	# - 2x length not known (with or without on_body)
619	if (!$redirect && $arg{want_body_handle}) {	724	if (!$redirect && $arg{want_body_handle}) {
620	$_[0]->on_eof (undef);	725	$_[0]->on_eof (undef);
621	$_[0]->on_error (undef);	726	$_[0]->on_error (undef);
622	$_[0]->on_read (undef);	727	$_[0]->on_read (undef);
623		728
624	$finish->(delete $state{handle}, \%hdr);	729	$finish->(delete $state{handle});
625		730
626	} elsif ($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
627	$_[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 $1;
		743
628	if ($len) {	744	if ($len) {
629	$_[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
630	$_[0]->on_read (sub {	751	$_[0]->push_read (line => sub {
631	$len -= length $_[0]{rbuf};	752	length $_[1]
632		753	and return $finish->(undef, 599 => "Garbled chunked transfer encoding");
633	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)	754	$_[0]->push_read (line => $read_chunk);
634	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
635
636	$len > 0	755	});
637	or $finish->("", \%hdr);
638	});	756	});
639	} else {	757	} else {
640	$_[0]->on_eof (sub {	758	$hdr{"content-length"} \|\|= $cl;
641	$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	}
642	});	770	}
643	$_[0]->on_read (sub {	771
644	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)	772	$finish->($body, undef, undef, 1);
645	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
646	});	773	});
647	}	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	});
648	} else {	792	} else {
649	$_[0]->on_eof (undef);	793	$_[0]->on_eof (sub {
650		794	$finish->("");
651	if ($len) {	795	});
652	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
653	$_[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 {
654	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)	807	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
655	if $len <= length $_[0]{rbuf};	808	if $len <= length $_[0]{rbuf};
656	});	809	});
657	} else {	810	} else {
658	$_[0]->on_error (sub {	811	$_[0]->on_error (sub {
659	$! == Errno::EPIPE	812	($! == Errno::EPIPE \|\| !$!)
660	? $finish->(delete $_[0]{rbuf}, \%hdr)	813	? $finish->(delete $_[0]{rbuf})
661	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });	814	: $finish->(undef, 599 => $_[2]);
662	});	815	});
663	$_[0]->on_read (sub { });	816	$_[0]->on_read (sub { });
664	}
665	}	817	}
666	}	818	}
667	});	819	}
668	});	820	};
		821
		822	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
669	};	823	};
670		824
671	# now handle proxy-CONNECT method	825	# now handle proxy-CONNECT method
672	if ($proxy && $uscheme eq "https") {	826	if ($proxy && $uscheme eq "https") {
673	# oh dear, we have to wrap it into a connect request	827	# oh dear, we have to wrap it into a connect request
674		828
675	# maybe re-use $uauthority with patched port?	829	# maybe re-use $uauthority with patched port?
676	$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");
677	$state{handle}->push_read (line => $qr_nlnl, sub {	831	$state{handle}->push_read (line => $qr_nlnl, sub {
678	$_[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
679	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])" }));
680		834
681	if ($2 == 200) {	835	if ($2 == 200) {
682	$rpath = $upath;	836	$rpath = $upath;
683	&$handle_actual_request;	837	&$handle_actual_request;
684	} else {	838	} else {
685	%state = ();	839	%state = ();
686	$cb->(undef, { Status => $2, Reason => $3, URL => $url });	840	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
687	}	841	}
688	});	842	});
689	} else {	843	} else {
690	&$handle_actual_request;	844	&$handle_actual_request;
691	}	845	}
692
693	}, sub {
694	$timeout
695	};	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 { $timeout });
		852
696	};	853	};
697		854
698	defined wantarray && AnyEvent::Util::guard { %state = () }	855	defined wantarray && AnyEvent::Util::guard { %state = () }
699	}	856	}
700		857
…		…
714	&http_request	871	&http_request
715	}	872	}
716		873
717	=back	874	=back
718		875
		876	=head2 DNS CACHING
		877
		878	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		879	the actual connection, which in turn uses AnyEvent::DNS to resolve
		880	hostnames. The latter is a simple stub resolver and does no caching
		881	on its own. If you want DNS caching, you currently have to provide
		882	your own default resolver (by storing a suitable resolver object in
		883	C<$AnyEvent::DNS::RESOLVER>).
		884
719	=head2 GLOBAL FUNCTIONS AND VARIABLES	885	=head2 GLOBAL FUNCTIONS AND VARIABLES
720		886
721	=over 4	887	=over 4
722		888
723	=item AnyEvent::HTTP::set_proxy "proxy-url"	889	=item AnyEvent::HTTP::set_proxy "proxy-url"
724		890
725	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
726	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.
727		906
728	=item $AnyEvent::HTTP::MAX_RECURSE	907	=item $AnyEvent::HTTP::MAX_RECURSE
729		908
730	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>).
731		910
732	=item $AnyEvent::HTTP::USERAGENT	911	=item $AnyEvent::HTTP::USERAGENT
733		912
734	The default value for the C<User-Agent> header (the default is	913	The default value for the C<User-Agent> header (the default is
735	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	914	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
736		915
737	=item $AnyEvent::HTTP::MAX_PERSISTENT	916	=item $AnyEvent::HTTP::MAX_PER_HOST
738		917
739	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.
740		921
741	Not implemented currently.	922	The default value for this is C<4>, and it is highly advisable to not
742		923	increase it.
743	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
744
745	The maximum time to cache a persistent connection, in seconds (default: 2).
746
747	Not implemented currently.
748		924
749	=item $AnyEvent::HTTP::ACTIVE	925	=item $AnyEvent::HTTP::ACTIVE
750		926
751	The number of active connections. This is not the number of currently	927	The number of active connections. This is not the number of currently
752	running requests, but the number of currently open and non-idle TCP	928	running requests, but the number of currently open and non-idle TCP
…		…
754		930
755	=back	931	=back
756		932
757	=cut	933	=cut
758		934
		935	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		936	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		937
		938	sub format_date($) {
		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, $_, $y);
		972	}
		973	}
		974
		975	undef
		976	}
		977
759	sub set_proxy($) {	978	sub set_proxy($) {
		979	if (length $_[0]) {
760	$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	}
761	}	986	}
762		987
763	# initialise proxy from environment	988	# initialise proxy from environment
		989	eval {
764	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	};
765		1048
766	=head1 SEE ALSO	1049	=head1 SEE ALSO
767		1050
768	L<AnyEvent>.	1051	L<AnyEvent>.
769		1052

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.42 by root, Mon Jul 6 00:08:16 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 1.42 by root, Mon Jul 6 00:08:16 2009 UTC vs.
Revision 1.68 by root, Fri Dec 31 19:22:18 2010 UTC