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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.13 by root, Thu Jun 5 16:43:45 2008 UTC vs.
Revision 1.44 by root, Tue Jul 7 00:15:32 2009 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 4.8 ();
43	use AnyEvent::Util ();	47	use AnyEvent::Util ();
44	use AnyEvent::Socket ();	48	use AnyEvent::Socket ();
45	use AnyEvent::Handle ();	49	use AnyEvent::Handle ();
46		50
47	use base Exporter::;	51	use base Exporter::;
48		52
49	our $VERSION = '1.0';	53	our $VERSION = '1.4';
50		54
51	our @EXPORT = qw(http_get http_request);	55	our @EXPORT = qw(http_get http_post http_head http_request);
52		56
53	our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	57	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
54	our $MAX_RECURSE = 10;	58	our $MAX_RECURSE = 10;
55	our $MAX_PERSISTENT = 8;	59	our $MAX_PERSISTENT = 8;
56	our $PERSISTENT_TIMEOUT = 2;	60	our $PERSISTENT_TIMEOUT = 2;
57	our $TIMEOUT = 300;	61	our $TIMEOUT = 300;
58		62
59	# changing these is evil	63	# changing these is evil
60	our $MAX_PERSISTENT_PER_HOST = 2;	64	our $MAX_PERSISTENT_PER_HOST = 0;
61	our $MAX_PER_HOST = 4;	65	our $MAX_PER_HOST = 4;
62		66
63	our $PROXY;	67	our $PROXY;
		68	our $ACTIVE = 0;
64		69
65	my %KA_COUNT; # number of open keep-alive connections per host	70	my %KA_COUNT; # number of open keep-alive connections per host
66	my %CO_SLOT; # number of open connections, and wait queue, per host	71	my %CO_SLOT; # number of open connections, and wait queue, per host
67		72
68	=item http_get $url, key => value..., $cb->($data, $headers)	73	=item http_get $url, key => value..., $cb->($data, $headers)
69		74
70	Executes an HTTP-GET request. See the http_request function for details on	75	Executes an HTTP-GET request. See the http_request function for details on
71	additional parameters.	76	additional parameters and the return value.
72		77
73	=item http_head $url, key => value..., $cb->($data, $headers)	78	=item http_head $url, key => value..., $cb->($data, $headers)
74		79
75	Executes an HTTP-HEAD request. See the http_request function for details on	80	Executes an HTTP-HEAD request. See the http_request function for details
76	additional parameters.	81	on additional parameters and the return value.
77		82
78	=item http_post $url, $body, key => value..., $cb->($data, $headers)	83	=item http_post $url, $body, key => value..., $cb->($data, $headers)
79		84
80	Executes an HTTP-POST request with a request body of C<$bod>. See the	85	Executes an HTTP-POST request with a request body of C<$body>. See the
81	http_request function for details on additional parameters.	86	http_request function for details on additional parameters and the return
		87	value.
82		88
83	=item http_request $method => $url, key => value..., $cb->($data, $headers)	89	=item http_request $method => $url, key => value..., $cb->($data, $headers)
84		90
85	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL	91	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
86	must be an absolute http or https URL.	92	must be an absolute http or https URL.
87		93
		94	When called in void context, nothing is returned. In other contexts,
		95	C<http_request> returns a "cancellation guard" - you have to keep the
		96	object at least alive until the callback get called. If the object gets
		97	destroyed before the callbakc is called, the request will be cancelled.
		98
88	The callback will be called with the response data as first argument	99	The callback will be called with the response body data as first argument
89	(or C<undef> if it wasn't available due to errors), and a hash-ref with	100	(or C<undef> if an error occured), and a hash-ref with response headers as
90	response headers as second argument.	101	second argument.
91		102
92	All the headers in that hash are lowercased. In addition to the response	103	All the headers in that hash are lowercased. In addition to the response
93	headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and	104	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
94	C<Reason> contain the three parts of the HTTP Status-Line of the same	105	contain the three parts of the HTTP Status-Line of the same name. The
		106	pseudo-header C<URL> contains the original URL (which can differ from the
		107	requested URL when following redirects).
		108
95	name. If the server sends a header multiple lines, then their contents	109	If the server sends a header multiple times, then their contents will be
96	will be joined together with C<\x00>.	110	joined together with a comma (C<,>), as per the HTTP spec.
97		111
98	If an internal error occurs, such as not being able to resolve a hostname,	112	If an internal error occurs, such as not being able to resolve a hostname,
99	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	113	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
100	and the C<Reason> pseudo-header will contain an error message.	114	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		115	message.
101		116
102	A typical callback might look like this:	117	A typical callback might look like this:
103		118
104	sub {	119	sub {
105	my ($body, $hdr) = @_;	120	my ($body, $hdr) = @_;
…		…
151	based on the original netscape specification.	166	based on the original netscape specification.
152		167
153	The C<$hash_ref> must be an (initially empty) hash reference which will	168	The C<$hash_ref> must be an (initially empty) hash reference which will
154	get updated automatically. It is possible to save the cookie_jar to	169	get updated automatically. It is possible to save the cookie_jar to
155	persistent storage with something like JSON or Storable, but this is not	170	persistent storage with something like JSON or Storable, but this is not
156	recommended, as expire times are currently being ignored.	171	recommended, as expiry times are currently being ignored.
157		172
158	Note that this cookie implementation is not of very high quality, nor	173	Note that this cookie implementation is not of very high quality, nor
159	meant to be complete. If you want complete cookie management you have to	174	meant to be complete. If you want complete cookie management you have to
160	do that on your own. C<cookie_jar> is meant as a quick fix to get some	175	do that on your own. C<cookie_jar> is meant as a quick fix to get some
161	cookie-using sites working. Cookies are a privacy disaster, do not use	176	cookie-using sites working. Cookies are a privacy disaster, do not use
162	them unless required to.	177	them unless required to.
		178
		179	=item tls_ctx => $scheme \| $tls_ctx
		180
		181	Specifies the AnyEvent::TLS context to be used for https connections. This
		182	parameter follows the same rules as the C<tls_ctx> parameter to
		183	L<AnyEvent::Handle>, but additionally, the two strings C<low> or
		184	C<high> can be specified, which give you a predefined low-security (no
		185	verification, highest compatibility) and high-security (CA and common-name
		186	verification) TLS context.
		187
		188	The default for this option is C<low>, which could be interpreted as "give
		189	me the page, no matter what".
		190
		191	=item on_header => $callback->($headers)
		192
		193	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
		195	locally-generated errors).
		196
		197	It has to return either true (in which case AnyEvent::HTTP will continue),
		198	or false, in which case AnyEvent::HTTP will cancel the download (and call
		199	the finish callback with an error code of C<598>).
		200
		201	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
		203	doing a C<HEAD> request.
		204
		205	Example: cancel the request unless the content-type is "text/html".
		206
		207	on_header => sub {
		208	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		209	},
		210
		211	=item on_body => $callback->($partial_body, $headers)
		212
		213	When specified, all body data will be passed to this callback instead of
		214	to the completion callback. The completion callback will get the empty
		215	string instead of the body data.
		216
		217	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
		219	the completion callback with an error code of C<598>).
		220
		221	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
		223	be extracted, or when the body should be processed incrementally.
		224
		225	It is usually preferred over doing your own body handling via
		226	C<want_body_handle>.
		227
		228	=item want_body_handle => $enable
		229
		230	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		231	changes considerably: after parsing the headers, and instead of
		232	downloading the body (if any), the completion callback will be
		233	called. Instead of the C<$body> argument containing the body data, the
		234	callback will receive the L<AnyEvent::Handle> object associated with the
		235	connection. In error cases, C<undef> will be passed. When there is no body
		236	(e.g. status C<304>), the empty string will be passed.
		237
		238	The handle object might or might not be in TLS mode, might be connected to
		239	a proxy, be a persistent connection etc., and configured in unspecified
		240	ways. The user is responsible for this handle (it will not be used by this
		241	module anymore).
		242
		243	This is useful with some push-type services, where, after the initial
		244	headers, an interactive protocol is used (typical example would be the
		245	push-style twitter API which starts a JSON/XML stream).
		246
		247	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.
163		249
164	=back	250	=back
165		251
166	Example: make a simple HTTP GET request for http://www.nethype.de/	252	Example: make a simple HTTP GET request for http://www.nethype.de/
167		253
…		…
181	use Data::Dumper;	267	use Data::Dumper;
182	print Dumper $hdr;	268	print Dumper $hdr;
183	}	269	}
184	;	270	;
185		271
		272	Example: make another simple HTTP GET request, but immediately try to
		273	cancel it.
		274
		275	my $request = http_request GET => "http://www.nethype.de/", sub {
		276	my ($body, $hdr) = @_;
		277	print "$body\n";
		278	};
		279
		280	undef $request;
		281
186	=cut	282	=cut
187		283
188	sub _slot_schedule;	284	sub _slot_schedule;
189	sub _slot_schedule($) {	285	sub _slot_schedule($) {
190	my $host = shift;	286	my $host = shift;
191		287
192	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {	288	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
193	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {	289	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
194	# somebody wants that slot	290	# somebody wants that slot
195	++$CO_SLOT{$host}[0];	291	++$CO_SLOT{$host}[0];
		292	++$ACTIVE;
196		293
197	$cb->(AnyEvent::Util::guard {	294	$cb->(AnyEvent::Util::guard {
		295	--$ACTIVE;
198	--$CO_SLOT{$host}[0];	296	--$CO_SLOT{$host}[0];
199	_slot_schedule $host;	297	_slot_schedule $host;
200	});	298	});
201	} else {	299	} else {
202	# nobody wants the slot, maybe we can forget about it	300	# nobody wants the slot, maybe we can forget about it
…		…
211	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	309	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
212		310
213	_slot_schedule $_[0];	311	_slot_schedule $_[0];
214	}	312	}
215		313
		314	our $qr_nl = qr<\015?\012>;
		315	our $qr_nlnl = qr<\015?\012\015?\012>;
		316
		317	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		318	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		319
216	sub http_request($$$;@) {	320	sub http_request($$@) {
217	my $cb = pop;	321	my $cb = pop;
218	my ($method, $url, %arg) = @_;	322	my ($method, $url, %arg) = @_;
219		323
220	my %hdr;	324	my %hdr;
		325
		326	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		327	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
221		328
222	$method = uc $method;	329	$method = uc $method;
223		330
224	if (my $hdr = $arg{headers}) {	331	if (my $hdr = $arg{headers}) {
225	while (my ($k, $v) = each %$hdr) {	332	while (my ($k, $v) = each %$hdr) {
226	$hdr{lc $k} = $v;	333	$hdr{lc $k} = $v;
227	}	334	}
228	}	335	}
229		336
230	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;	337	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
231		338
232	return $cb->(undef, { Status => 599, Reason => "recursion limit reached" })	339	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
233	if $recurse < 0;	340	if $recurse < 0;
234		341
235	my $proxy = $arg{proxy} \|\| $PROXY;	342	my $proxy = $arg{proxy} \|\| $PROXY;
236	my $timeout = $arg{timeout} \|\| $TIMEOUT;	343	my $timeout = $arg{timeout} \|\| $TIMEOUT;
237		344
238	$hdr{"user-agent"} \|\|= $USERAGENT;
239
240	my ($scheme, $authority, $upath, $query, $fragment) =	345	my ($uscheme, $uauthority, $upath, $query, $fragment) =
241	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	346	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;
242		347
243	$scheme = lc $scheme;	348	$uscheme = lc $uscheme;
244		349
245	my $uport = $scheme eq "http" ? 80	350	my $uport = $uscheme eq "http" ? 80
246	: $scheme eq "https" ? 443	351	: $uscheme eq "https" ? 443
247	: return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported" });	352	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });
248		353
249	$hdr{referer} \|\|= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic
250
251	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	354	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
252	or return $cb->(undef, { Status => 599, Reason => "unparsable URL" });	355	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
253		356
254	my $uhost = $1;	357	my $uhost = $1;
255	$uport = $2 if defined $2;	358	$uport = $2 if defined $2;
256		359
		360	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";
		361
257	$uhost =~ s/^\[(.*)\]$/$1/;	362	$uhost =~ s/^\[(.*)\]$/$1/;
258	$upath .= "?$query" if length $query;	363	$upath .= "?$query" if length $query;
259		364
260	$upath =~ s%^/?%/%;	365	$upath =~ s%^/?%/%;
261		366
262	# cookie processing	367	# cookie processing
263	if (my $jar = $arg{cookie_jar}) {	368	if (my $jar = $arg{cookie_jar}) {
264	%$jar = () if $jar->{version} < 1;	369	%$jar = () if $jar->{version} != 1;
265		370
266	my @cookie;	371	my @cookie;
267		372
268	while (my ($chost, $v) = each %$jar) {	373	while (my ($chost, $v) = each %$jar) {
		374	if ($chost =~ /^\./) {
269	next unless $chost eq substr $uhost, -length $chost;	375	next unless $chost eq substr $uhost, -length $chost;
270	next unless $chost =~ /^\./;	376	} elsif ($chost =~ /\./) {
		377	next unless $chost eq $uhost;
		378	} else {
		379	next;
		380	}
271		381
272	while (my ($cpath, $v) = each %$v) {	382	while (my ($cpath, $v) = each %$v) {
273	next unless $cpath eq substr $upath, 0, length $cpath;	383	next unless $cpath eq substr $upath, 0, length $cpath;
274		384
275	while (my ($k, $v) = each %$v) {	385	while (my ($k, $v) = each %$v) {
276	next if $scheme ne "https" && exists $v->{secure};	386	next if $uscheme ne "https" && exists $v->{secure};
		387	my $value = $v->{value};
		388	$value =~ s/([\\"])/\\$1/g;
277	push @cookie, "$k=$v->{value}";	389	push @cookie, "$k=\"$value\"";
278	}	390	}
279	}	391	}
280	}	392	}
281		393
282	$hdr{cookie} = join "; ", @cookie	394	$hdr{cookie} = join "; ", @cookie
283	if @cookie;	395	if @cookie;
284	}	396	}
285		397
286	my ($rhost, $rport, $rpath); # request host, port, path	398	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
287		399
288	if ($proxy) {	400	if ($proxy) {
289	($rhost, $rport, $scheme) = @$proxy;	401	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
290	$rpath = $url;	402
		403	# don't support https requests over https-proxy transport,
		404	# can't be done with tls as spec'ed, unless you double-encrypt.
		405	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
291	} else {	406	} else {
292	($rhost, $rport, $rpath) = ($uhost, $uport, $upath);	407	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
293	$hdr{host} = $uhost;
294	}	408	}
		409
		410	$hdr{"user-agent"} \|\|= $USERAGENT;
		411	$hdr{referer} \|\|= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
295		412
296	$hdr{"content-length"} = length $arg{body};	413	$hdr{"content-length"} = length $arg{body};
297		414
298	my %state = (connect_guard => 1);	415	my %state = (connect_guard => 1);
299		416
…		…
302		419
303	return unless $state{connect_guard};	420	return unless $state{connect_guard};
304		421
305	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	422	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
306	$state{fh} = shift	423	$state{fh} = shift
		424	or do {
		425	my $err = "$!";
		426	%state = ();
307	or return $cb->(undef, { Status => 599, Reason => "$!" });	427	return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
		428	};
308		429
309	delete $state{connect_guard}; # reduce memory usage, save a tree	430	pop; # free memory, save a tree
		431
		432	return unless delete $state{connect_guard};
310		433
311	# get handle	434	# get handle
312	$state{handle} = new AnyEvent::Handle	435	$state{handle} = new AnyEvent::Handle
313	fh => $state{fh},	436	fh => $state{fh},
314	($scheme eq "https" ? (tls => "connect") : ());	437	timeout => $timeout,
		438	peername => $rhost,
		439	tls_ctx => $arg{tls_ctx};
315		440
316	# limit the number of persistent connections	441	# limit the number of persistent connections
		442	# keepalive not yet supported
317	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	443	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
318	++$KA_COUNT{$_[1]};	444	++$KA_COUNT{$_[1]};
319	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	445	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		446	--$KA_COUNT{$_[1]}
		447	};
320	$hdr{connection} = "keep-alive";	448	$hdr{connection} = "keep-alive";
321	delete $hdr{connection}; # keep-alive not yet supported
322	} else {	449	} else {
323	delete $hdr{connection};	450	delete $hdr{connection};
324	}	451	}
325		452
326	# (re-)configure handle	453	# (re-)configure handle
327	$state{handle}->timeout ($timeout);
328	$state{handle}->on_error (sub {	454	$state{handle}->on_error (sub {
329	%state = ();	455	%state = ();
330	$cb->(undef, { Status => 599, Reason => "$!" });	456	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
331	});	457	});
332	$state{handle}->on_eof (sub {	458	$state{handle}->on_eof (sub {
333	%state = ();	459	%state = ();
334	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });	460	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
335	});	461	});
336		462
		463	$state{handle}->starttls ("connect") if $rscheme eq "https";
		464
		465	# handle actual, non-tunneled, request
		466	my $handle_actual_request = sub {
		467	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		468
337	# send request	469	# send request
338	$state{handle}->push_write (	470	$state{handle}->push_write (
339	"$method $rpath HTTP/1.0\015\012"	471	"$method $rpath HTTP/1.0\015\012"
340	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)	472	. (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
341	. "\015\012"	473	. "\015\012"
342	. (delete $arg{body})	474	. (delete $arg{body})
343	);
344
345	%hdr = (); # reduce memory usage, save a kitten
346
347	# status line
348	$state{handle}->push_read (line => qr/\015?\012/, sub {
349	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
350	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
351
352	my %hdr = ( # response headers
353	HTTPVersion => "\x00$1",
354	Status => "\x00$2",
355	Reason => "\x00$3",
356	);	475	);
357		476
		477	%hdr = (); # reduce memory usage, save a kitten
		478
		479	# status line
		480	$state{handle}->push_read (line => $qr_nl, sub {
		481	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		482	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
		483
		484	my %hdr = ( # response headers
		485	HTTPVersion => ",$1",
		486	Status => ",$2",
		487	Reason => ",$3",
		488	URL => ",$url"
		489	);
		490
358	# headers, could be optimized a bit	491	# headers, could be optimized a bit
359	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {	492	$state{handle}->unshift_read (line => $qr_nlnl, sub {
360	for ("$_[1]\012") {	493	for ("$_[1]\012") {
361	# we support spaces in field names, as lotus domino	494	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
362	# creates them.	495
		496	# things seen, not parsed:
		497	# p3pP="NON CUR OTPi OUR NOR UNI"
		498
363	$hdr{lc $1} .= "\x00$2"	499	$hdr{lc $1} .= ",$2"
364	while /\G	500	while /\G
365	([^:\000-\037]+):	501	([^:\000-\037]*):
366	[\011\040]*	502	[\011\040]*
367	((?: [^\015\012]+ \| \015?\012[\011\040] )*)	503	((?: [^\012]+ \| \012[\011\040] )*)
368	\015?\012	504	\012
369	/gxc;	505	/gxc;
370		506
371	/\G$/	507	/\G$/
372	or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers" }));	508	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
373	}	509	}
374		510
375	substr $_, 0, 1, ""	511	substr $_, 0, 1, ""
376	for values %hdr;	512	for values %hdr;
377		513
378	my $finish = sub {	514	# redirect handling
379	%state = ();	515	# microsoft and other shitheads don't give a shit for following standards,
		516	# try to support some common forms of broken Location headers.
		517	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		518	$hdr{location} =~ s/^\.\/+//;
380		519
381	# set-cookie processing	520	my $url = "$rscheme://$uhost:$uport";
382	if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
383	for (split /\x00/, $hdr{"set-cookie"}) {
384	my ($cookie, @arg) = split /;\s*/;
385	my ($name, $value) = split /=/, $cookie, 2;
386	my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
387
388	my $cdom = (delete $kv{domain}) \|\| $uhost;
389	my $cpath = (delete $kv{path}) \|\| "/";
390
391	$cdom =~ s/^.?/./; # make sure it starts with a "."
392		521
393	next if $cdom =~ /\.$/;	522	unless ($hdr{location} =~ s/^\///) {
394		523	$url .= $upath;
395	# this is not rfc-like and not netscape-like. go figure.	524	$url =~ s/\/[^\/]*$//;
396	my $ndots = $cdom =~ y/.//;	525	}
397	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	526
398		527	$hdr{location} = "$url/$hdr{location}";
		528	}
		529
		530	my $redirect;
		531
		532	if ($recurse) {
		533	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
		534	# apparently, mozilla et al. just change POST to GET here
		535	# more research is needed before we do the same
399	# store it	536	$redirect = 1;
400	$arg{cookie_jar}{version} = 1;	537	} elsif ($hdr{Status} == 303) {
401	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;	538	# even http/1.1 is unclear on how to mutate the method
		539	$method = "GET" unless $method eq "HEAD";
		540	$redirect = 1;
		541	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET\|HEAD)$/) {
		542	$redirect = 1;
402	}	543	}
403	}	544	}
404		545
405	if ($_[1]{Status} =~ /^30[12]$/ && $recurse) {	546	my $finish = sub {
406	# microsoft and other assholes don't give a shit for following standards,	547	$state{handle}->destroy if $state{handle};
407	# try to support a common form of broken Location header.	548	%state = ();
408	$_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;
409		549
		550	# set-cookie processing
		551	if ($arg{cookie_jar}) {
		552	for ($_[1]{"set-cookie"}) {
		553	# parse NAME=VALUE
		554	my @kv;
		555
		556	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
		557	my $name = $1;
		558	my $value = $3;
		559
		560	unless ($value) {
		561	$value = $2;
		562	$value =~ s/\\(.)/$1/gs;
		563	}
		564
		565	push @kv, $name => $value;
		566
		567	last unless /\G\s*;/gc;
		568	}
		569
		570	last unless @kv;
		571
		572	my $name = shift @kv;
		573	my %kv = (value => shift @kv, @kv);
		574
		575	my $cdom;
		576	my $cpath = (delete $kv{path}) \|\| "/";
		577
		578	if (exists $kv{domain}) {
		579	$cdom = delete $kv{domain};
		580
		581	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		582
		583	next if $cdom =~ /\.$/;
		584
		585	# this is not rfc-like and not netscape-like. go figure.
		586	my $ndots = $cdom =~ y/.//;
		587	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		588	} else {
		589	$cdom = $uhost;
		590	}
		591
		592	# store it
		593	$arg{cookie_jar}{version} = 1;
		594	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		595
		596	redo if /\G\s*,/gc;
		597	}
		598	}
		599
		600	if ($redirect) {
		601	# we ignore any errors, as it is very common to receive
		602	# Content-Length != 0 but no actual body
		603	# we also access %hdr, as $_[1] might be an erro
410	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);	604	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
		605	} else {
		606	$cb->($_[0], $_[1]);
		607	}
		608	};
		609
		610	my $len = $hdr{"content-length"};
		611
		612	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		613	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
		614	} elsif (
		615	$hdr{Status} =~ /^(?:1..\|[23]04)$/
		616	or $method eq "HEAD"
		617	or (defined $len && !$len)
		618	) {
		619	# no body
		620	$finish->("", \%hdr);
411	} else {	621	} else {
412	$cb->($_[0], $_[1]);	622	# body handling, four different code paths
		623	# for want_body_handle, on_body (2x), normal (2x)
		624	# we might read too much here, but it does not matter yet (no pers. connections)
		625	if (!$redirect && $arg{want_body_handle}) {
		626	$_[0]->on_eof (undef);
		627	$_[0]->on_error (undef);
		628	$_[0]->on_read (undef);
		629
		630	$finish->(delete $state{handle}, \%hdr);
		631
		632	} elsif ($arg{on_body}) {
		633	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
		634	if ($len) {
		635	$_[0]->on_eof (undef);
		636	$_[0]->on_read (sub {
		637	$len -= length $_[0]{rbuf};
		638
		639	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		640	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
		641
		642	$len > 0
		643	or $finish->("", \%hdr);
		644	});
		645	} else {
		646	$_[0]->on_eof (sub {
		647	$finish->("", \%hdr);
		648	});
		649	$_[0]->on_read (sub {
		650	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		651	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
		652	});
		653	}
		654	} else {
		655	$_[0]->on_eof (undef);
		656
		657	if ($len) {
		658	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
		659	$_[0]->on_read (sub {
		660	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
		661	if $len <= length $_[0]{rbuf};
		662	});
		663	} else {
		664	$_[0]->on_error (sub {
		665	$! == Errno::EPIPE \|\| !$!
		666	? $finish->(delete $_[0]{rbuf}, \%hdr)
		667	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
		668	});
		669	$_[0]->on_read (sub { });
		670	}
		671	}
413	}	672	}
414	};	673	});
		674	});
		675	};
415		676
416	if ($hdr{Status} =~ /^(?:1..\|204\|304)$/ or $method eq "HEAD") {	677	# now handle proxy-CONNECT method
417	$finish->(undef, \%hdr);	678	if ($proxy && $uscheme eq "https") {
		679	# oh dear, we have to wrap it into a connect request
		680
		681	# maybe re-use $uauthority with patched port?
		682	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		683	$state{handle}->push_read (line => $qr_nlnl, sub {
		684	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		685	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
		686
		687	if ($2 == 200) {
		688	$rpath = $upath;
		689	&$handle_actual_request;
418	} else {	690	} else {
419	if (exists $hdr{"content-length"}) {	691	%state = ();
420	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	692	$cb->(undef, { Status => $2, Reason => $3, URL => $url });
421	# could cache persistent connection now
422	if ($hdr{connection} =~ /\bkeep-alive\b/i) {
423	# but we don't, due to misdesigns, this is annoyingly complex
424	};
425
426	$finish->($_[1], \%hdr);
427	});
428	} else {
429	# too bad, need to read until we get an error or EOF,
430	# no way to detect winged data.
431	$_[0]->on_error (sub {
432	$finish->($_[0]{rbuf}, \%hdr);
433	});
434	$_[0]->on_eof (undef);
435	$_[0]->on_read (sub { });
436	}
437	}	693	}
438	});	694	});
		695	} else {
		696	&$handle_actual_request;
439	});	697	}
		698
440	}, sub {	699	}, sub {
441	$timeout	700	$timeout
442	};	701	};
443	};	702	};
444		703
445	defined wantarray && AnyEvent::Util::guard { %state = () }	704	defined wantarray && AnyEvent::Util::guard { %state = () }
446	}	705	}
447		706
448	sub http_get($$;@) {	707	sub http_get($@) {
449	unshift @_, "GET";	708	unshift @_, "GET";
450	&http_request	709	&http_request
451	}	710	}
452		711
453	sub http_head($$;@) {	712	sub http_head($@) {
454	unshift @_, "HEAD";	713	unshift @_, "HEAD";
455	&http_request	714	&http_request
456	}	715	}
457		716
458	sub http_post($$$;@) {	717	sub http_post($$@) {
		718	my $url = shift;
459	unshift @_, "POST", "body";	719	unshift @_, "POST", $url, "body";
460	&http_request	720	&http_request
461	}	721	}
462		722
463	=back	723	=back
464		724
…		…
476	The default value for the C<recurse> request parameter (default: C<10>).	736	The default value for the C<recurse> request parameter (default: C<10>).
477		737
478	=item $AnyEvent::HTTP::USERAGENT	738	=item $AnyEvent::HTTP::USERAGENT
479		739
480	The default value for the C<User-Agent> header (the default is	740	The default value for the C<User-Agent> header (the default is
481	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	741	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
482		742
483	=item $AnyEvent::HTTP::MAX_PERSISTENT	743	=item $AnyEvent::HTTP::MAX_PER_HOST
484		744
485	The maximum number of persistent connections to keep open (default: 8).	745	The maximum number of concurrent conenctions to the same host (identified
		746	by the hostname). If the limit is exceeded, then the additional requests
		747	are queued until previous connections are closed.
486		748
487	Not implemented currently.	749	The default value for this is C<4>, and it is highly advisable to not
		750	increase it.
488		751
489	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	752	=item $AnyEvent::HTTP::ACTIVE
490		753
491	The maximum time to cache a persistent connection, in seconds (default: 2).	754	The number of active connections. This is not the number of currently
492		755	running requests, but the number of currently open and non-idle TCP
493	Not implemented currently.	756	connections. This number of can be useful for load-leveling.
494		757
495	=back	758	=back
496		759
497	=cut	760	=cut
498		761
…		…
507		770
508	L<AnyEvent>.	771	L<AnyEvent>.
509		772
510	=head1 AUTHOR	773	=head1 AUTHOR
511		774
512	Marc Lehmann <schmorp@schmorp.de>	775	Marc Lehmann <schmorp@schmorp.de>
513	http://home.schmorp.de/	776	http://home.schmorp.de/
		777
		778	With many thanks to Дмитрий Шалашов, who provided countless
		779	testcases and bugreports.
514		780
515	=cut	781	=cut
516		782
517	1	783	1
518		784

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.13 by root, Thu Jun 5 16:43:45 2008 UTC vs. Revision 1.44 by root, Tue Jul 7 00:15:32 2009 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.13 by root, Thu Jun 5 16:43:45 2008 UTC vs.
Revision 1.44 by root, Tue Jul 7 00:15:32 2009 UTC