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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.10 by root, Thu Jun 5 13:06:43 2008 UTC vs.
Revision 1.53 by root, Sat Dec 5 15:37:07 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.
13		17
		18	This module implements a simple, stateless and non-blocking HTTP
		19	client. It supports GET, POST and other request methods, cookies and more,
		20	all on a very low level. It can follow redirects supports proxies and
		21	automatically limits the number of connections to the values specified in
		22	the RFC.
		23
		24	It should generally be a "good client" that is enough for most HTTP
		25	tasks. Simple tasks should be simple, but complex tasks should still be
		26	possible as the user retains control over request and response headers.
		27
		28	The caller is responsible for authentication management, cookies (if
		29	the simplistic implementation in this module doesn't suffice), referer
		30	and other high-level protocol details for which this module offers only
		31	limited support.
		32
14	=head2 METHODS	33	=head2 METHODS
15		34
16	=over 4	35	=over 4
17		36
18	=cut	37	=cut
…		…
20	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
21		40
22	use strict;	41	use strict;
23	no warnings;	42	no warnings;
24		43
25	use Carp;	44	use Errno ();
26		45
27	use AnyEvent ();	46	use AnyEvent 5.0 ();
28	use AnyEvent::Util ();	47	use AnyEvent::Util ();
29	use AnyEvent::Socket ();	48	use AnyEvent::Socket ();
30	use AnyEvent::Handle ();	49	use AnyEvent::Handle ();
31		50
32	use base Exporter::;	51	use base Exporter::;
33		52
34	our $VERSION = '1.0';	53	our $VERSION = '1.44';
35		54
36	our @EXPORT = qw(http_get http_request);	55	our @EXPORT = qw(http_get http_post http_head http_request);
37		56
38	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)";
39	our $MAX_RECURSE = 10;	58	our $MAX_RECURSE = 10;
40	our $MAX_PERSISTENT = 8;	59	our $MAX_PERSISTENT = 8;
41	our $PERSISTENT_TIMEOUT = 2;	60	our $PERSISTENT_TIMEOUT = 2;
42	our $TIMEOUT = 300;	61	our $TIMEOUT = 300;
43		62
44	# changing these is evil	63	# changing these is evil
45	our $MAX_PERSISTENT_PER_HOST = 2;	64	our $MAX_PERSISTENT_PER_HOST = 0;
46	our $MAX_PER_HOST = 4; # not respected yet :(	65	our $MAX_PER_HOST = 4;
47		66
48	our $PROXY;	67	our $PROXY;
		68	our $ACTIVE = 0;
49		69
50	my %KA_COUNT; # number of open keep-alive connections per host	70	my %KA_COUNT; # number of open keep-alive connections per host
		71	my %CO_SLOT; # number of open connections, and wait queue, per host
51		72
52	=item http_get $url, key => value..., $cb->($data, $headers)	73	=item http_get $url, key => value..., $cb->($data, $headers)
53		74
54	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
55	additional parameters.	76	additional parameters and the return value.
56		77
57	=item http_head $url, key => value..., $cb->($data, $headers)	78	=item http_head $url, key => value..., $cb->($data, $headers)
58		79
59	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
60	additional parameters.	81	on additional parameters and the return value.
61		82
62	=item http_post $url, $body, key => value..., $cb->($data, $headers)	83	=item http_post $url, $body, key => value..., $cb->($data, $headers)
63		84
64	Executes an HTTP-POST request with a request body of C<$bod>. See the	85	Executes an HTTP-POST request with a request body of C<$body>. See the
65	http_request function for details on additional parameters.	86	http_request function for details on additional parameters and the return
		87	value.
66		88
67	=item http_request $method => $url, key => value..., $cb->($data, $headers)	89	=item http_request $method => $url, key => value..., $cb->($data, $headers)
68		90
69	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL	91	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
70	must be an absolute http or https URL.	92	must be an absolute http or https URL.
71		93
		94	When called in void context, nothing is returned. In other contexts,
		95	C<http_request> returns a "cancellation guard" - you have to keep the
		96	object at least alive until the callback get called. If the object gets
		97	destroyed before the callbakc is called, the request will be cancelled.
		98
72	The callback will be called with the response data as first argument	99	The callback will be called with the response body data as first argument
73	(or C<undef> if it wasn't available due to errors), and a hash-ref with	100	(or C<undef> if an error occured), and a hash-ref with response headers as
74	response headers as second argument.	101	second argument.
75		102
76	All the headers in that hash are lowercased. In addition to the response	103	All the headers in that hash are lowercased. In addition to the response
77	headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and	104	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
78	C<Reason> contain the three parts of the HTTP Status-Line of the same	105	contain the three parts of the HTTP Status-Line of the same name. The
		106	pseudo-header C<URL> contains the original URL (which can differ from the
		107	requested URL when following redirects).
		108
79	name. If the server sends a header multiple lines, then their contents	109	If the server sends a header multiple times, then their contents will be
80	will be joined together with C<\x00>.	110	joined together with a comma (C<,>), as per the HTTP spec.
81		111
82	If an internal error occurs, such as not being able to resolve a hostname,	112	If an internal error occurs, such as not being able to resolve a hostname,
83	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	113	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
84	and the C<Reason> pseudo-header will contain an error message.	114	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		115	message.
85		116
86	A typical callback might look like this:	117	A typical callback might look like this:
87		118
88	sub {	119	sub {
89	my ($body, $hdr) = @_;	120	my ($body, $hdr) = @_;
…		…
105	Whether to recurse requests or not, e.g. on redirects, authentication	136	Whether to recurse requests or not, e.g. on redirects, authentication
106	retries and so on, and how often to do so.	137	retries and so on, and how often to do so.
107		138
108	=item headers => hashref	139	=item headers => hashref
109		140
110	The request headers to use.	141	The request headers to use. Currently, C<http_request> may provide its
		142	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
		143	and will provide defaults for C<User-Agent:> and C<Referer:> (this can be
		144	suppressed by using C<undef> for these headers in which case they won't be
		145	sent at all).
111		146
112	=item timeout => $seconds	147	=item timeout => $seconds
113		148
114	The time-out to use for various stages - each connect attempt will reset	149	The time-out to use for various stages - each connect attempt will reset
115	the timeout, as will read or write activity. Default timeout is 5 minutes.	150	the timeout, as will read or write activity, i.e. this is not an overall
		151	timeout.
		152
		153	Default timeout is 5 minutes.
116		154
117	=item proxy => [$host, $port[, $scheme]] or undef	155	=item proxy => [$host, $port[, $scheme]] or undef
118		156
119	Use the given http proxy for all requests. If not specified, then the	157	Use the given http proxy for all requests. If not specified, then the
120	default proxy (as specified by C<$ENV{http_proxy}>) is used.	158	default proxy (as specified by C<$ENV{http_proxy}>) is used.
121		159
122	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	160	C<$scheme> must be either missing, C<http> for HTTP or C<https> for
123	HTTPS.	161	HTTPS.
124		162
125	=item body => $string	163	=item body => $string
126		164
127	The request body, usually empty. Will be-sent as-is (future versions of	165	The request body, usually empty. Will be-sent as-is (future versions of
…		…
133	based on the original netscape specification.	171	based on the original netscape specification.
134		172
135	The C<$hash_ref> must be an (initially empty) hash reference which will	173	The C<$hash_ref> must be an (initially empty) hash reference which will
136	get updated automatically. It is possible to save the cookie_jar to	174	get updated automatically. It is possible to save the cookie_jar to
137	persistent storage with something like JSON or Storable, but this is not	175	persistent storage with something like JSON or Storable, but this is not
138	recommended, as expire times are currently being ignored.	176	recommended, as expiry times are currently being ignored.
139		177
140	Note that this cookie implementation is not of very high quality, nor	178	Note that this cookie implementation is not of very high quality, nor
141	meant to be complete. If you want complete cookie management you have to	179	meant to be complete. If you want complete cookie management you have to
142	do that on your own. C<cookie_jar> is meant as a quick fix to get some	180	do that on your own. C<cookie_jar> is meant as a quick fix to get some
143	cookie-using sites working. Cookies are a privacy disaster, do not use	181	cookie-using sites working. Cookies are a privacy disaster, do not use
144	them unless required to.	182	them unless required to.
		183
		184	=item tls_ctx => $scheme \| $tls_ctx
		185
		186	Specifies the AnyEvent::TLS context to be used for https connections. This
		187	parameter follows the same rules as the C<tls_ctx> parameter to
		188	L<AnyEvent::Handle>, but additionally, the two strings C<low> or
		189	C<high> can be specified, which give you a predefined low-security (no
		190	verification, highest compatibility) and high-security (CA and common-name
		191	verification) TLS context.
		192
		193	The default for this option is C<low>, which could be interpreted as "give
		194	me the page, no matter what".
		195
		196	=item on_prepare => $callback->($fh)
		197
		198	In rare cases you need to "tune" the socket before it is used to
		199	connect (for exmaple, to bind it on a given IP address). This parameter
		200	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		201	and behaves exactly the same way (e.g. it has to provide a
		202	timeout). See the description for the C<$prepare_cb> argument of
		203	C<AnyEvent::Socket::tcp_connect> for details.
		204
		205	=item on_header => $callback->($headers)
		206
		207	When specified, this callback will be called with the header hash as soon
		208	as headers have been successfully received from the remote server (not on
		209	locally-generated errors).
		210
		211	It has to return either true (in which case AnyEvent::HTTP will continue),
		212	or false, in which case AnyEvent::HTTP will cancel the download (and call
		213	the finish callback with an error code of C<598>).
		214
		215	This callback is useful, among other things, to quickly reject unwanted
		216	content, which, if it is supposed to be rare, can be faster than first
		217	doing a C<HEAD> request.
		218
		219	Example: cancel the request unless the content-type is "text/html".
		220
		221	on_header => sub {
		222	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		223	},
		224
		225	=item on_body => $callback->($partial_body, $headers)
		226
		227	When specified, all body data will be passed to this callback instead of
		228	to the completion callback. The completion callback will get the empty
		229	string instead of the body data.
		230
		231	It has to return either true (in which case AnyEvent::HTTP will continue),
		232	or false, in which case AnyEvent::HTTP will cancel the download (and call
		233	the completion callback with an error code of C<598>).
		234
		235	This callback is useful when the data is too large to be held in memory
		236	(so the callback writes it to a file) or when only some information should
		237	be extracted, or when the body should be processed incrementally.
		238
		239	It is usually preferred over doing your own body handling via
		240	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		241	only used to create a connection, C<want_body_handle> is the better
		242	alternative, as it allows you to install your own event handler, reducing
		243	resource usage.
		244
		245	=item want_body_handle => $enable
		246
		247	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		248	changes considerably: after parsing the headers, and instead of
		249	downloading the body (if any), the completion callback will be
		250	called. Instead of the C<$body> argument containing the body data, the
		251	callback will receive the L<AnyEvent::Handle> object associated with the
		252	connection. In error cases, C<undef> will be passed. When there is no body
		253	(e.g. status C<304>), the empty string will be passed.
		254
		255	The handle object might or might not be in TLS mode, might be connected to
		256	a proxy, be a persistent connection etc., and configured in unspecified
		257	ways. The user is responsible for this handle (it will not be used by this
		258	module anymore).
		259
		260	This is useful with some push-type services, where, after the initial
		261	headers, an interactive protocol is used (typical example would be the
		262	push-style twitter API which starts a JSON/XML stream).
		263
		264	If you think you need this, first have a look at C<on_body>, to see if
		265	that doesn't solve your problem in a better way.
145		266
146	=back	267	=back
147		268
148	Example: make a simple HTTP GET request for http://www.nethype.de/	269	Example: make a simple HTTP GET request for http://www.nethype.de/
149		270
…		…
163	use Data::Dumper;	284	use Data::Dumper;
164	print Dumper $hdr;	285	print Dumper $hdr;
165	}	286	}
166	;	287	;
167		288
		289	Example: make another simple HTTP GET request, but immediately try to
		290	cancel it.
		291
		292	my $request = http_request GET => "http://www.nethype.de/", sub {
		293	my ($body, $hdr) = @_;
		294	print "$body\n";
		295	};
		296
		297	undef $request;
		298
168	=cut	299	=cut
169		300
		301	sub _slot_schedule;
		302	sub _slot_schedule($) {
		303	my $host = shift;
		304
		305	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
		306	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
		307	# somebody wants that slot
		308	++$CO_SLOT{$host}[0];
		309	++$ACTIVE;
		310
		311	$cb->(AnyEvent::Util::guard {
		312	--$ACTIVE;
		313	--$CO_SLOT{$host}[0];
		314	_slot_schedule $host;
		315	});
		316	} else {
		317	# nobody wants the slot, maybe we can forget about it
		318	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
		319	last;
		320	}
		321	}
		322	}
		323
		324	# wait for a free slot on host, call callback
		325	sub _get_slot($$) {
		326	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
		327
		328	_slot_schedule $_[0];
		329	}
		330
		331	our $qr_nl = qr{\015?\012};
		332	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		333
		334	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		335	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		336
170	sub http_request($$$;@) {	337	sub http_request($$@) {
171	my $cb = pop;	338	my $cb = pop;
172	my ($method, $url, %arg) = @_;	339	my ($method, $url, %arg) = @_;
173		340
174	my %hdr;	341	my %hdr;
		342
		343	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		344	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
175		345
176	$method = uc $method;	346	$method = uc $method;
177		347
178	if (my $hdr = $arg{headers}) {	348	if (my $hdr = $arg{headers}) {
179	while (my ($k, $v) = each %$hdr) {	349	while (my ($k, $v) = each %$hdr) {
180	$hdr{lc $k} = $v;	350	$hdr{lc $k} = $v;
181	}	351	}
182	}	352	}
183		353
184	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;	354	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
185		355
186	return $cb->(undef, { Status => 599, Reason => "recursion limit reached" })	356	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
187	if $recurse < 0;	357	if $recurse < 0;
188		358
189	my $proxy = $arg{proxy} \|\| $PROXY;	359	my $proxy = $arg{proxy} \|\| $PROXY;
190	my $timeout = $arg{timeout} \|\| $TIMEOUT;	360	my $timeout = $arg{timeout} \|\| $TIMEOUT;
191		361
192	$hdr{"user-agent"} \|\|= $USERAGENT;
193
194	my ($scheme, $authority, $upath, $query, $fragment) =	362	my ($uscheme, $uauthority, $upath, $query, $fragment) =
195	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	363	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;
196		364
197	$scheme = lc $scheme;	365	$uscheme = lc $uscheme;
198		366
199	my $uport = $scheme eq "http" ? 80	367	my $uport = $uscheme eq "http" ? 80
200	: $scheme eq "https" ? 443	368	: $uscheme eq "https" ? 443
201	: return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported" });	369	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });
202		370
203	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	371	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
204	or return $cb->(undef, { Status => 599, Reason => "unparsable URL" });	372	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
205		373
206	my $uhost = $1;	374	my $uhost = $1;
207	$uport = $2 if defined $2;	375	$uport = $2 if defined $2;
208		376
		377	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		378	unless exists $hdr{host};
		379
209	$uhost =~ s/^\[(.*)\]$/$1/;	380	$uhost =~ s/^\[(.*)\]$/$1/;
210	$upath .= "?$query" if length $query;	381	$upath .= "?$query" if length $query;
211		382
212	$upath =~ s%^/?%/%;	383	$upath =~ s%^/?%/%;
213		384
214	# cookie processing	385	# cookie processing
215	if (my $jar = $arg{cookie_jar}) {	386	if (my $jar = $arg{cookie_jar}) {
216	%$jar = () if $jar->{version} < 1;	387	%$jar = () if $jar->{version} != 1;
217		388
218	my @cookie;	389	my @cookie;
219		390
220	while (my ($chost, $v) = each %$jar) {	391	while (my ($chost, $v) = each %$jar) {
		392	if ($chost =~ /^\./) {
221	next unless $chost eq substr $uhost, -length $chost;	393	next unless $chost eq substr $uhost, -length $chost;
222	next unless $chost =~ /^\./;	394	} elsif ($chost =~ /\./) {
		395	next unless $chost eq $uhost;
		396	} else {
		397	next;
		398	}
223		399
224	while (my ($cpath, $v) = each %$v) {	400	while (my ($cpath, $v) = each %$v) {
225	next unless $cpath eq substr $upath, 0, length $cpath;	401	next unless $cpath eq substr $upath, 0, length $cpath;
226		402
227	while (my ($k, $v) = each %$v) {	403	while (my ($k, $v) = each %$v) {
228	next if $scheme ne "https" && exists $v->{secure};	404	next if $uscheme ne "https" && exists $v->{secure};
		405	my $value = $v->{value};
		406	$value =~ s/([\\"])/\\$1/g;
229	push @cookie, "$k=$v->{value}";	407	push @cookie, "$k=\"$value\"";
230	}	408	}
231	}	409	}
232	}	410	}
233		411
234	$hdr{cookie} = join "; ", @cookie	412	$hdr{cookie} = join "; ", @cookie
235	if @cookie;	413	if @cookie;
236	}	414	}
237		415
238	my ($rhost, $rport, $rpath); # request host, port, path	416	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
239		417
240	if ($proxy) {	418	if ($proxy) {
241	($rhost, $rport, $scheme) = @$proxy;	419	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
242	$rpath = $url;	420
		421	$rscheme = "http" unless defined $rscheme;
		422
		423	# don't support https requests over https-proxy transport,
		424	# can't be done with tls as spec'ed, unless you double-encrypt.
		425	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
243	} else {	426	} else {
244	($rhost, $rport, $rpath) = ($uhost, $uport, $upath);	427	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
245	$hdr{host} = $uhost;
246	}	428	}
247		429
		430	# leave out fragment and query string, just a heuristic
		431	$hdr{referer} \|\|= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		432	$hdr{"user-agent"} \|\|= $USERAGENT unless exists $hdr{"user-agent"};
		433
248	$hdr{"content-length"} = length $arg{body};	434	$hdr{"content-length"} = length $arg{body}
		435	if length $arg{body} \|\| $method ne "GET";
249		436
250	my %state;	437	my %state = (connect_guard => 1);
251		438
		439	_get_slot $uhost, sub {
		440	$state{slot_guard} = shift;
		441
		442	return unless $state{connect_guard};
		443
252	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	444	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
253	$state{fh} = shift	445	$state{fh} = shift
254	or return $cb->(undef, { Status => 599, Reason => "$!" });
255
256	delete $state{connect_guard}; # reduce memory usage, save a tree
257
258	# get handle
259	$state{handle} = new AnyEvent::Handle
260	fh => $state{fh},
261	($scheme eq "https" ? (tls => "connect") : ());
262
263	# limit the number of persistent connections
264	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
265	++$KA_COUNT{$_[1]};
266	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };
267	$hdr{connection} = "keep-alive";
268	delete $hdr{connection}; # keep-alive not yet supported
269	} else {
270	delete $hdr{connection};
271	}
272
273	# (re-)configure handle
274	$state{handle}->timeout ($timeout);
275	$state{handle}->on_error (sub {
276	%state = ();
277	$cb->(undef, { Status => 599, Reason => "$!" });
278	});
279	$state{handle}->on_eof (sub {
280	%state = ();
281	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
282	});
283
284	# send request
285	$state{handle}->push_write (
286	"$method $rpath HTTP/1.0\015\012"
287	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
288	. "\015\012"
289	. (delete $arg{body})
290	);
291
292	%hdr = (); # reduce memory usage, save a kitten
293
294	# status line
295	$state{handle}->push_read (line => qr/\015?\012/, sub {
296	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
297	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
298
299	my %hdr = ( # response headers
300	HTTPVersion => "\x00$1",
301	Status => "\x00$2",
302	Reason => "\x00$3",
303	);
304
305	# headers, could be optimized a bit
306	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
307	for ("$_[1]\012") {
308	# we support spaces in field names, as lotus domino
309	# creates them.
310	$hdr{lc $1} .= "\x00$2"
311	while /\G
312	([^:\000-\037]+):
313	[\011\040]*
314	((?: [^\015\012]+ \| \015?\012[\011\040] )*)
315	\015?\012
316	/gxc;
317
318	/\G$/
319	or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers" }));
320	}	446	or do {
321		447	my $err = "$!";
322	substr $_, 0, 1, ""
323	for values %hdr;
324
325	my $finish = sub {
326	%state = ();	448	%state = ();
		449	return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
		450	};
327		451
328	# set-cookie processing	452	pop; # free memory, save a tree
329	if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {	453
330	for (split /\x00/, $hdr{"set-cookie"}) {	454	return unless delete $state{connect_guard};
331	my ($cookie, @arg) = split /;\s*/;	455
332	my ($name, $value) = split /=/, $cookie, 2;	456	# get handle
333	my %kv = (value => $value, map { split /=/, $_, 2 } @arg);	457	$state{handle} = new AnyEvent::Handle
334		458	fh => $state{fh},
335	my $cdom = (delete $kv{domain}) \|\| $uhost;	459	timeout => $timeout,
336	my $cpath = (delete $kv{path}) \|\| "/";	460	peername => $rhost,
337		461	tls_ctx => $arg{tls_ctx};
338	$cdom =~ s/^.?/./; # make sure it starts with a "."	462
339		463	# limit the number of persistent connections
340	my $ndots = $cdom =~ y/.//;	464	# keepalive not yet supported
341	next if $ndots < ($cdom =~ /[^.]{3}$/ ? 2 : 3);	465	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
342		466	++$KA_COUNT{$_[1]};
343	# store it	467	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {
344	$arg{cookie_jar}{version} = 1;	468	--$KA_COUNT{$_[1]}
345	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;	469	};
		470	$hdr{connection} = "keep-alive";
		471	} else {
		472	delete $hdr{connection};
		473	}
		474
		475	# (re-)configure handle
		476	$state{handle}->on_error (sub {
		477	%state = ();
		478	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
		479	});
		480	$state{handle}->on_eof (sub {
		481	%state = ();
		482	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
		483	});
		484
		485	$state{handle}->starttls ("connect") if $rscheme eq "https";
		486
		487	# handle actual, non-tunneled, request
		488	my $handle_actual_request = sub {
		489	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		490
		491	# send request
		492	$state{handle}->push_write (
		493	"$method $rpath HTTP/1.0\015\012"
		494	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		495	. "\015\012"
		496	. (delete $arg{body})
		497	);
		498
		499	%hdr = (); # reduce memory usage, save a kitten
		500
		501	# status line
		502	$state{handle}->push_read (line => $qr_nl, sub {
		503	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		504	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
		505
		506	my %hdr = ( # response headers
		507	HTTPVersion => ",$1",
		508	Status => ",$2",
		509	Reason => ",$3",
		510	URL => ",$url"
		511	);
		512
		513	# headers, could be optimized a bit
		514	$state{handle}->unshift_read (line => $qr_nlnl, sub {
		515	for ("$_[1]") {
		516	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		517
		518	# things seen, not parsed:
		519	# p3pP="NON CUR OTPi OUR NOR UNI"
		520
		521	$hdr{lc $1} .= ",$2"
		522	while /\G
		523	([^:\000-\037]*):
		524	[\011\040]*
		525	((?: [^\012]+ \| \012[\011\040] )*)
		526	\012
		527	/gxc;
		528
		529	/\G$/
		530	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
346	}	531	}
		532
		533	substr $_, 0, 1, ""
		534	for values %hdr;
		535
		536	# redirect handling
		537	# microsoft and other shitheads don't give a shit for following standards,
		538	# try to support some common forms of broken Location headers.
		539	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		540	$hdr{location} =~ s/^\.\/+//;
		541
		542	my $url = "$rscheme://$uhost:$uport";
		543
		544	unless ($hdr{location} =~ s/^\///) {
		545	$url .= $upath;
		546	$url =~ s/\/[^\/]*$//;
		547	}
		548
		549	$hdr{location} = "$url/$hdr{location}";
		550	}
		551
		552	my $redirect;
		553
		554	if ($recurse) {
		555	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
		556	# apparently, mozilla et al. just change POST to GET here
		557	# more research is needed before we do the same
		558	$redirect = 1;
		559	} elsif ($hdr{Status} == 303) {
		560	# even http/1.1 is unclear on how to mutate the method
		561	$method = "GET" unless $method eq "HEAD";
		562	$redirect = 1;
		563	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET\|HEAD)$/) {
		564	$redirect = 1;
		565	}
		566	}
		567
		568	my $finish = sub {
		569	$state{handle}->destroy if $state{handle};
		570	%state = ();
		571
		572	# set-cookie processing
		573	if ($arg{cookie_jar}) {
		574	for ($_[1]{"set-cookie"}) {
		575	# parse NAME=VALUE
		576	my @kv;
		577
		578	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
		579	my $name = $1;
		580	my $value = $3;
		581
		582	unless ($value) {
		583	$value = $2;
		584	$value =~ s/\\(.)/$1/gs;
		585	}
		586
		587	push @kv, $name => $value;
		588
		589	last unless /\G\s*;/gc;
		590	}
		591
		592	last unless @kv;
		593
		594	my $name = shift @kv;
		595	my %kv = (value => shift @kv, @kv);
		596
		597	my $cdom;
		598	my $cpath = (delete $kv{path}) \|\| "/";
		599
		600	if (exists $kv{domain}) {
		601	$cdom = delete $kv{domain};
		602
		603	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		604
		605	next if $cdom =~ /\.$/;
		606
		607	# this is not rfc-like and not netscape-like. go figure.
		608	my $ndots = $cdom =~ y/.//;
		609	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		610	} else {
		611	$cdom = $uhost;
		612	}
		613
		614	# store it
		615	$arg{cookie_jar}{version} = 1;
		616	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		617
		618	redo if /\G\s*,/gc;
		619	}
		620	}
		621
		622	if ($redirect && exists $hdr{location}) {
		623	# we ignore any errors, as it is very common to receive
		624	# Content-Length != 0 but no actual body
		625	# we also access %hdr, as $_[1] might be an erro
		626	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
		627	} else {
		628	$cb->($_[0], $_[1]);
		629	}
		630	};
		631
		632	my $len = $hdr{"content-length"};
		633
		634	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		635	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
		636	} elsif (
		637	$hdr{Status} =~ /^(?:1..\|[23]04)$/
		638	or $method eq "HEAD"
		639	or (defined $len && !$len)
		640	) {
		641	# no body
		642	$finish->("", \%hdr);
		643	} else {
		644	# body handling, four different code paths
		645	# for want_body_handle, on_body (2x), normal (2x)
		646	# we might read too much here, but it does not matter yet (no pers. connections)
		647	if (!$redirect && $arg{want_body_handle}) {
		648	$_[0]->on_eof (undef);
		649	$_[0]->on_error (undef);
		650	$_[0]->on_read (undef);
		651
		652	$finish->(delete $state{handle}, \%hdr);
		653
		654	} elsif ($arg{on_body}) {
		655	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
		656	if ($len) {
		657	$_[0]->on_eof (undef);
		658	$_[0]->on_read (sub {
		659	$len -= length $_[0]{rbuf};
		660
		661	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		662	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
		663
		664	$len > 0
		665	or $finish->("", \%hdr);
		666	});
		667	} else {
		668	$_[0]->on_eof (sub {
		669	$finish->("", \%hdr);
		670	});
		671	$_[0]->on_read (sub {
		672	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		673	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
		674	});
		675	}
		676	} else {
		677	$_[0]->on_eof (undef);
		678
		679	if ($len) {
		680	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
		681	$_[0]->on_read (sub {
		682	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
		683	if $len <= length $_[0]{rbuf};
		684	});
		685	} else {
		686	$_[0]->on_error (sub {
		687	$! == Errno::EPIPE \|\| !$!
		688	? $finish->(delete $_[0]{rbuf}, \%hdr)
		689	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
		690	});
		691	$_[0]->on_read (sub { });
		692	}
		693	}
		694	}
		695	});
		696	});
		697	};
		698
		699	# now handle proxy-CONNECT method
		700	if ($proxy && $uscheme eq "https") {
		701	# oh dear, we have to wrap it into a connect request
		702
		703	# maybe re-use $uauthority with patched port?
		704	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		705	$state{handle}->push_read (line => $qr_nlnl, sub {
		706	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		707	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
		708
		709	if ($2 == 200) {
		710	$rpath = $upath;
		711	&$handle_actual_request;
		712	} else {
		713	%state = ();
		714	$cb->(undef, { Status => $2, Reason => $3, URL => $url });
347	}	715	}
348
349	if ($_[1]{Status} =~ /^x30[12]$/ && $recurse) {
350	# microsoft and other assholes don't give a shit for following standards,
351	# try to support a common form of broken Location header.
352	$_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;
353
354	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
355	} else {
356	$cb->($_[0], $_[1]);
357	}
358	};	716	});
359
360	if ($hdr{Status} =~ /^(?:1..\|204\|304)$/ or $method eq "HEAD") {
361	$finish->(undef, \%hdr);
362	} else {	717	} else {
363	if (exists $hdr{"content-length"}) {	718	&$handle_actual_request;
364	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
365	# could cache persistent connection now
366	if ($hdr{connection} =~ /\bkeep-alive\b/i) {
367	# but we don't, due to misdesigns, this is annoyingly complex
368	};
369
370	$finish->($_[1], \%hdr);
371	});
372	} else {
373	# too bad, need to read until we get an error or EOF,
374	# no way to detect winged data.
375	$_[0]->on_error (sub {
376	$finish->($_[0]{rbuf}, \%hdr);
377	});
378	$_[0]->on_eof (undef);
379	$_[0]->on_read (sub { });
380	}
381	}
382	});	719	}
383	});	720
384	}, sub {	721	}, $arg{on_prepare} \|\| sub { $timeout };
385	$timeout
386	};	722	};
387		723
388	defined wantarray && AnyEvent::Util::guard { %state = () }	724	defined wantarray && AnyEvent::Util::guard { %state = () }
389	}	725	}
390		726
391	sub http_get($$;@) {	727	sub http_get($@) {
392	unshift @_, "GET";	728	unshift @_, "GET";
393	&http_request	729	&http_request
394	}	730	}
395		731
396	sub http_head($$;@) {	732	sub http_head($@) {
397	unshift @_, "HEAD";	733	unshift @_, "HEAD";
398	&http_request	734	&http_request
399	}	735	}
400		736
401	sub http_post($$$;@) {	737	sub http_post($$@) {
		738	my $url = shift;
402	unshift @_, "POST", "body";	739	unshift @_, "POST", $url, "body";
403	&http_request	740	&http_request
404	}	741	}
405		742
406	=back	743	=back
407		744
…		…
410	=over 4	747	=over 4
411		748
412	=item AnyEvent::HTTP::set_proxy "proxy-url"	749	=item AnyEvent::HTTP::set_proxy "proxy-url"
413		750
414	Sets the default proxy server to use. The proxy-url must begin with a	751	Sets the default proxy server to use. The proxy-url must begin with a
415	string of the form C<http://host:port> (optionally C<https:...>).	752	string of the form C<http://host:port> (optionally C<https:...>), croaks
		753	otherwise.
		754
		755	To clear an already-set proxy, use C<undef>.
416		756
417	=item $AnyEvent::HTTP::MAX_RECURSE	757	=item $AnyEvent::HTTP::MAX_RECURSE
418		758
419	The default value for the C<recurse> request parameter (default: C<10>).	759	The default value for the C<recurse> request parameter (default: C<10>).
420		760
421	=item $AnyEvent::HTTP::USERAGENT	761	=item $AnyEvent::HTTP::USERAGENT
422		762
423	The default value for the C<User-Agent> header (the default is	763	The default value for the C<User-Agent> header (the default is
424	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	764	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
425		765
426	=item $AnyEvent::HTTP::MAX_PERSISTENT	766	=item $AnyEvent::HTTP::MAX_PER_HOST
427		767
428	The maximum number of persistent connections to keep open (default: 8).	768	The maximum number of concurrent connections to the same host (identified
		769	by the hostname). If the limit is exceeded, then the additional requests
		770	are queued until previous connections are closed.
429		771
430	Not implemented currently.	772	The default value for this is C<4>, and it is highly advisable to not
		773	increase it.
431		774
432	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	775	=item $AnyEvent::HTTP::ACTIVE
433		776
434	The maximum time to cache a persistent connection, in seconds (default: 2).	777	The number of active connections. This is not the number of currently
435		778	running requests, but the number of currently open and non-idle TCP
436	Not implemented currently.	779	connections. This number of can be useful for load-leveling.
437		780
438	=back	781	=back
439		782
440	=cut	783	=cut
441		784
442	sub set_proxy($) {	785	sub set_proxy($) {
		786	if (length $_[0]) {
443	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	787	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		788	or Carp::croak "$_[0]: invalid proxy URL";
		789	$PROXY = [$2, $3 \|\| 3128, $1]
		790	} else {
		791	undef $PROXY;
		792	}
444	}	793	}
445		794
446	# initialise proxy from environment	795	# initialise proxy from environment
		796	eval {
447	set_proxy $ENV{http_proxy};	797	set_proxy $ENV{http_proxy};
		798	};
448		799
449	=head1 SEE ALSO	800	=head1 SEE ALSO
450		801
451	L<AnyEvent>.	802	L<AnyEvent>.
452		803
453	=head1 AUTHOR	804	=head1 AUTHOR
454		805
455	Marc Lehmann <schmorp@schmorp.de>	806	Marc Lehmann <schmorp@schmorp.de>
456	http://home.schmorp.de/	807	http://home.schmorp.de/
		808
		809	With many thanks to Дмитрий Шалашов, who provided countless
		810	testcases and bugreports.
457		811
458	=cut	812	=cut
459		813
460	1	814	1
461		815

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.10 by root, Thu Jun 5 13:06:43 2008 UTC vs. Revision 1.53 by root, Sat Dec 5 15:37:07 2009 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.10 by root, Thu Jun 5 13:06:43 2008 UTC vs.
Revision 1.53 by root, Sat Dec 5 15:37:07 2009 UTC