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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.1 by root, Tue Jun 3 16:37:13 2008 UTC vs.
Revision 1.49 by root, Wed Aug 5 16:23:48 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 4.8 ();
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 = '1.42';
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 $MAX_REDIRECTS = 10;
39	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)";
		58	our $MAX_RECURSE = 10;
40	our $MAX_PERSISTENT = 8;	59	our $MAX_PERSISTENT = 8;
41	our $PERSISTENT_TIMEOUT = 15;	60	our $PERSISTENT_TIMEOUT = 2;
42	our $TIMEOUT = 60;	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;
		66
		67	our $PROXY;
		68	our $ACTIVE = 0;
47		69
48	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
49		72
50	=item http_get $url, key => value..., $cb->($data, $headers)	73	=item http_get $url, key => value..., $cb->($data, $headers)
51		74
52	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
53	additional parameters.	76	additional parameters and the return value.
		77
		78	=item http_head $url, key => value..., $cb->($data, $headers)
		79
		80	Executes an HTTP-HEAD request. See the http_request function for details
		81	on additional parameters and the return value.
		82
		83	=item http_post $url, $body, key => value..., $cb->($data, $headers)
		84
		85	Executes an HTTP-POST request with a request body of C<$body>. See the
		86	http_request function for details on additional parameters and the return
		87	value.
54		88
55	=item http_request $method => $url, key => value..., $cb->($data, $headers)	89	=item http_request $method => $url, key => value..., $cb->($data, $headers)
56		90
57	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL	91	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
58	must be an absolute http or https URL.	92	must be an absolute http or https URL.
59		93
		94	When called in void context, nothing is returned. In other contexts,
		95	C<http_request> returns a "cancellation guard" - you have to keep the
		96	object at least alive until the callback get called. If the object gets
		97	destroyed before the callbakc is called, the request will be cancelled.
		98
		99	The callback will be called with the response body data as first argument
		100	(or C<undef> if an error occured), and a hash-ref with response headers as
		101	second argument.
		102
		103	All the headers in that hash are lowercased. In addition to the response
		104	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
		105	contain the three parts of the HTTP Status-Line of the same name. The
		106	pseudo-header C<URL> contains the original URL (which can differ from the
		107	requested URL when following redirects).
		108
		109	If the server sends a header multiple times, then their contents will be
		110	joined together with a comma (C<,>), as per the HTTP spec.
		111
		112	If an internal error occurs, such as not being able to resolve a hostname,
		113	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
		114	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		115	message.
		116
		117	A typical callback might look like this:
		118
		119	sub {
		120	my ($body, $hdr) = @_;
		121
		122	if ($hdr->{Status} =~ /^2/) {
		123	... everything should be ok
		124	} else {
		125	print "error, $hdr->{Status} $hdr->{Reason}\n";
		126	}
		127	}
		128
60	Additional parameters are key-value pairs, and are fully optional. They	129	Additional parameters are key-value pairs, and are fully optional. They
61	include:	130	include:
62		131
63	=over 4	132	=over 4
64		133
65	=item recurse => $boolean (default: true)	134	=item recurse => $count (default: $MAX_RECURSE)
66		135
67	Whether to recurse requests or not, e.g. on redirects, authentication	136	Whether to recurse requests or not, e.g. on redirects, authentication
68	retries and so on.	137	retries and so on, and how often to do so.
69		138
70	=item headers => hashref	139	=item headers => hashref
71		140
72	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).
73		146
74	=item timeout => $seconds	147	=item timeout => $seconds
75		148
76	The time-out to use for various stages - each connect attempt will reset	149	The time-out to use for various stages - each connect attempt will reset
77	the timeout, as will read or write activity.	150	the timeout, as will read or write activity. Default timeout is 5 minutes.
		151
		152	=item proxy => [$host, $port[, $scheme]] or undef
		153
		154	Use the given http proxy for all requests. If not specified, then the
		155	default proxy (as specified by C<$ENV{http_proxy}>) is used.
		156
		157	C<$scheme> must be either missing, C<http> for HTTP or C<https> for
		158	HTTPS.
		159
		160	=item body => $string
		161
		162	The request body, usually empty. Will be-sent as-is (future versions of
		163	this module might offer more options).
		164
		165	=item cookie_jar => $hash_ref
		166
		167	Passing this parameter enables (simplified) cookie-processing, loosely
		168	based on the original netscape specification.
		169
		170	The C<$hash_ref> must be an (initially empty) hash reference which will
		171	get updated automatically. It is possible to save the cookie_jar to
		172	persistent storage with something like JSON or Storable, but this is not
		173	recommended, as expiry times are currently being ignored.
		174
		175	Note that this cookie implementation is not of very high quality, nor
		176	meant to be complete. If you want complete cookie management you have to
		177	do that on your own. C<cookie_jar> is meant as a quick fix to get some
		178	cookie-using sites working. Cookies are a privacy disaster, do not use
		179	them unless required to.
		180
		181	=item tls_ctx => $scheme \| $tls_ctx
		182
		183	Specifies the AnyEvent::TLS context to be used for https connections. This
		184	parameter follows the same rules as the C<tls_ctx> parameter to
		185	L<AnyEvent::Handle>, but additionally, the two strings C<low> or
		186	C<high> can be specified, which give you a predefined low-security (no
		187	verification, highest compatibility) and high-security (CA and common-name
		188	verification) TLS context.
		189
		190	The default for this option is C<low>, which could be interpreted as "give
		191	me the page, no matter what".
		192
		193	=item on_header => $callback->($headers)
		194
		195	When specified, this callback will be called with the header hash as soon
		196	as headers have been successfully received from the remote server (not on
		197	locally-generated errors).
		198
		199	It has to return either true (in which case AnyEvent::HTTP will continue),
		200	or false, in which case AnyEvent::HTTP will cancel the download (and call
		201	the finish callback with an error code of C<598>).
		202
		203	This callback is useful, among other things, to quickly reject unwanted
		204	content, which, if it is supposed to be rare, can be faster than first
		205	doing a C<HEAD> request.
		206
		207	Example: cancel the request unless the content-type is "text/html".
		208
		209	on_header => sub {
		210	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		211	},
		212
		213	=item on_body => $callback->($partial_body, $headers)
		214
		215	When specified, all body data will be passed to this callback instead of
		216	to the completion callback. The completion callback will get the empty
		217	string instead of the body data.
		218
		219	It has to return either true (in which case AnyEvent::HTTP will continue),
		220	or false, in which case AnyEvent::HTTP will cancel the download (and call
		221	the completion callback with an error code of C<598>).
		222
		223	This callback is useful when the data is too large to be held in memory
		224	(so the callback writes it to a file) or when only some information should
		225	be extracted, or when the body should be processed incrementally.
		226
		227	It is usually preferred over doing your own body handling via
		228	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		229	only used to create a connection, C<want_body_handle> is the better
		230	alternative, as it allows you to install your own event handler, reducing
		231	resource usage.
		232
		233	=item want_body_handle => $enable
		234
		235	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		236	changes considerably: after parsing the headers, and instead of
		237	downloading the body (if any), the completion callback will be
		238	called. Instead of the C<$body> argument containing the body data, the
		239	callback will receive the L<AnyEvent::Handle> object associated with the
		240	connection. In error cases, C<undef> will be passed. When there is no body
		241	(e.g. status C<304>), the empty string will be passed.
		242
		243	The handle object might or might not be in TLS mode, might be connected to
		244	a proxy, be a persistent connection etc., and configured in unspecified
		245	ways. The user is responsible for this handle (it will not be used by this
		246	module anymore).
		247
		248	This is useful with some push-type services, where, after the initial
		249	headers, an interactive protocol is used (typical example would be the
		250	push-style twitter API which starts a JSON/XML stream).
		251
		252	If you think you need this, first have a look at C<on_body>, to see if
		253	that doesn't solve your problem in a better way.
78		254
79	=back	255	=back
80		256
81	=back	257	Example: make a simple HTTP GET request for http://www.nethype.de/
		258
		259	http_request GET => "http://www.nethype.de/", sub {
		260	my ($body, $hdr) = @_;
		261	print "$body\n";
		262	};
		263
		264	Example: make a HTTP HEAD request on https://www.google.com/, use a
		265	timeout of 30 seconds.
		266
		267	http_request
		268	GET => "https://www.google.com",
		269	timeout => 30,
		270	sub {
		271	my ($body, $hdr) = @_;
		272	use Data::Dumper;
		273	print Dumper $hdr;
		274	}
		275	;
		276
		277	Example: make another simple HTTP GET request, but immediately try to
		278	cancel it.
		279
		280	my $request = http_request GET => "http://www.nethype.de/", sub {
		281	my ($body, $hdr) = @_;
		282	print "$body\n";
		283	};
		284
		285	undef $request;
82		286
83	=cut	287	=cut
84		288
		289	sub _slot_schedule;
		290	sub _slot_schedule($) {
		291	my $host = shift;
		292
		293	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
		294	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
		295	# somebody wants that slot
		296	++$CO_SLOT{$host}[0];
		297	++$ACTIVE;
		298
		299	$cb->(AnyEvent::Util::guard {
		300	--$ACTIVE;
		301	--$CO_SLOT{$host}[0];
		302	_slot_schedule $host;
		303	});
		304	} else {
		305	# nobody wants the slot, maybe we can forget about it
		306	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
		307	last;
		308	}
		309	}
		310	}
		311
		312	# wait for a free slot on host, call callback
		313	sub _get_slot($$) {
		314	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
		315
		316	_slot_schedule $_[0];
		317	}
		318
		319	our $qr_nl = qr{\015?\012};
		320	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		321
		322	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		323	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		324
85	sub http_request($$$;@) {	325	sub http_request($$@) {
86	my $cb = pop;	326	my $cb = pop;
87	my ($method, $url, %arg) = @_;	327	my ($method, $url, %arg) = @_;
88		328
89	my %hdr;	329	my %hdr;
90		330
		331	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		332	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
		333
		334	$method = uc $method;
		335
91	if (my $hdr = delete $arg{headers}) {	336	if (my $hdr = $arg{headers}) {
92	while (my ($k, $v) = each %$hdr) {	337	while (my ($k, $v) = each %$hdr) {
93	$hdr{lc $k} = $v;	338	$hdr{lc $k} = $v;
94	}	339	}
95	}	340	}
96		341
		342	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
		343
		344	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
		345	if $recurse < 0;
		346
		347	my $proxy = $arg{proxy} \|\| $PROXY;
97	my $timeout = $arg{timeout} \|\| $TIMEOUT;	348	my $timeout = $arg{timeout} \|\| $TIMEOUT;
98		349
99	$hdr{"user-agent"} \|\|= $USERAGENT;
100
101	my ($scheme, $authority, $path, $query, $fragment) =	350	my ($uscheme, $uauthority, $upath, $query, $fragment) =
102	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	351	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;
103		352
104	$scheme = lc $scheme;	353	$uscheme = lc $uscheme;
		354
105	my $port = $scheme eq "http" ? 80	355	my $uport = $uscheme eq "http" ? 80
106	: $scheme eq "https" ? 443	356	: $uscheme eq "https" ? 443
107	: croak "$url: only http and https URLs supported";	357	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });
108		358
109	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	359	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
110	or croak "$authority: unparsable URL";	360	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
111		361
112	my $host = $1;	362	my $uhost = $1;
113	$port = $2 if defined $2;	363	$uport = $2 if defined $2;
114		364
		365	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";
		366
115	$host =~ s/^\[(.*)\]$/$1/;	367	$uhost =~ s/^\[(.*)\]$/$1/;
116	$path .= "?$query" if length $query;	368	$upath .= "?$query" if length $query;
117		369
118	$hdr{host} = $host = lc $host;	370	$upath =~ s%^/?%/%;
119		371
120	my %state;	372	# cookie processing
121		373	if (my $jar = $arg{cookie_jar}) {
122	my $body = "";	374	%$jar = () if $jar->{version} != 1;
123	$state{body} = $body;	375
124		376	my @cookie;
125	$hdr{"content-length"} = length $body;	377
126		378	while (my ($chost, $v) = each %$jar) {
127	$state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub {	379	if ($chost =~ /^\./) {
128	$state{fh} = shift	380	next unless $chost eq substr $uhost, -length $chost;
129	or return $cb->(undef, { Status => 599, Reason => "$!" });	381	} elsif ($chost =~ /\./) {
130		382	next unless $chost eq $uhost;
131	delete $state{connect_guard}; # reduce memory usage, save a tree
132
133	# get handle
134	$state{handle} = new AnyEvent::Handle
135	fh => $state{fh},
136	($scheme eq "https" ? (tls => "connect") : ());
137
138	# limit the number of persistent connections
139	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
140	++$KA_COUNT{$_[1]};
141	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };
142	$hdr{connection} = "keep-alive";
143	} else {	383	} else {
144	delete $hdr{connection};	384	next;
		385	}
		386
		387	while (my ($cpath, $v) = each %$v) {
		388	next unless $cpath eq substr $upath, 0, length $cpath;
		389
		390	while (my ($k, $v) = each %$v) {
		391	next if $uscheme ne "https" && exists $v->{secure};
		392	my $value = $v->{value};
		393	$value =~ s/([\\"])/\\$1/g;
		394	push @cookie, "$k=\"$value\"";
		395	}
		396	}
145	}	397	}
		398
		399	$hdr{cookie} = join "; ", @cookie
		400	if @cookie;
		401	}
146		402
147	# (re-)configure handle	403	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
148	$state{handle}->timeout ($timeout);	404
149	$state{handle}->on_error (sub {	405	if ($proxy) {
		406	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
		407
		408	$rscheme = "http" unless defined $rscheme;
		409
		410	# don't support https requests over https-proxy transport,
		411	# can't be done with tls as spec'ed, unless you double-encrypt.
		412	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		413	} else {
		414	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
		415	}
		416
		417	# leave out fragment and query string, just a heuristic
		418	$hdr{referer} \|\|= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		419	$hdr{"user-agent"} \|\|= $USERAGENT unless exists $hdr{"user-agent"};
		420
		421	$hdr{"content-length"} = length $arg{body};
		422
		423	my %state = (connect_guard => 1);
		424
		425	_get_slot $uhost, sub {
		426	$state{slot_guard} = shift;
		427
		428	return unless $state{connect_guard};
		429
		430	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
		431	$state{fh} = shift
		432	or do {
		433	my $err = "$!";
150	%state = ();	434	%state = ();
151	$cb->(undef, { Status => 599, Reason => "$!" });	435	return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
152	});
153	$state{handle}->on_eof (sub {
154	%state = ();
155	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
156	});
157
158	# send request
159	$state{handle}->push_write (
160	"\U$method\E $path HTTP/1.0\015\012"
161	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
162	. "\015\012"
163	. (delete $state{body})
164	);
165
166	%hdr = (); # reduce memory usage, save a kitten
167
168	# status line
169	$state{handle}->push_read (line => qr/\015?\012/, sub {
170	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
171	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
172
173	my %hdr = ( # response headers
174	HTTPVersion => ",$1",
175	Status => ",$2",
176	Reason => ",$3",
177	);
178
179	# headers, could be optimized a bit
180	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
181	for ("$_[1]\012") {
182	$hdr{lc $1} .= ",$2"
183	while /\G
184	([^:\000-\040]+):
185	[\011\040]*
186	((?: [^\015\012]+ \| \015?\012[\011\040] )*)
187	\015?\012
188	/gxc;
189
190	/\G$/
191	or return $cb->(undef, { Status => 599, Reason => "garbled response headers" });
192	}	436	};
193		437
		438	pop; # free memory, save a tree
		439
		440	return unless delete $state{connect_guard};
		441
		442	# get handle
		443	$state{handle} = new AnyEvent::Handle
		444	fh => $state{fh},
		445	timeout => $timeout,
		446	peername => $rhost,
		447	tls_ctx => $arg{tls_ctx};
		448
		449	# limit the number of persistent connections
		450	# keepalive not yet supported
		451	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
		452	++$KA_COUNT{$_[1]};
		453	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		454	--$KA_COUNT{$_[1]}
		455	};
		456	$hdr{connection} = "keep-alive";
		457	} else {
		458	delete $hdr{connection};
		459	}
		460
		461	# (re-)configure handle
		462	$state{handle}->on_error (sub {
		463	%state = ();
		464	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
		465	});
		466	$state{handle}->on_eof (sub {
		467	%state = ();
		468	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
		469	});
		470
		471	$state{handle}->starttls ("connect") if $rscheme eq "https";
		472
		473	# handle actual, non-tunneled, request
		474	my $handle_actual_request = sub {
		475	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		476
		477	# send request
		478	$state{handle}->push_write (
		479	"$method $rpath HTTP/1.0\015\012"
		480	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
		481	. "\015\012"
		482	. (delete $arg{body})
		483	);
		484
		485	%hdr = (); # reduce memory usage, save a kitten
		486
		487	# status line
		488	$state{handle}->push_read (line => $qr_nl, sub {
		489	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		490	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
		491
		492	my %hdr = ( # response headers
		493	HTTPVersion => ",$1",
		494	Status => ",$2",
		495	Reason => ",$3",
		496	URL => ",$url"
		497	);
		498
		499	# headers, could be optimized a bit
		500	$state{handle}->unshift_read (line => $qr_nlnl, sub {
		501	for ("$_[1]") {
		502	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		503
		504	# things seen, not parsed:
		505	# p3pP="NON CUR OTPi OUR NOR UNI"
		506
		507	$hdr{lc $1} .= ",$2"
		508	while /\G
		509	([^:\000-\037]*):
		510	[\011\040]*
		511	((?: [^\012]+ \| \012[\011\040] )*)
		512	\012
		513	/gxc;
		514
		515	/\G$/
		516	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
		517	}
		518
194	substr $_, 0, 1, ""	519	substr $_, 0, 1, ""
195	for values %hdr;	520	for values %hdr;
196		521
197	if (exists $hdr{"content-length"}) {	522	# redirect handling
198	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	523	# microsoft and other shitheads don't give a shit for following standards,
199	# could cache persistent connection now	524	# try to support some common forms of broken Location headers.
200	if ($hdr{connection} =~ /\bkeep-alive\b/i) {	525	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		526	$hdr{location} =~ s/^\.\/+//;
		527
		528	my $url = "$rscheme://$uhost:$uport";
		529
		530	unless ($hdr{location} =~ s/^\///) {
		531	$url .= $upath;
		532	$url =~ s/\/[^\/]*$//;
		533	}
		534
		535	$hdr{location} = "$url/$hdr{location}";
		536	}
		537
		538	my $redirect;
		539
		540	if ($recurse) {
		541	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
		542	# apparently, mozilla et al. just change POST to GET here
		543	# more research is needed before we do the same
		544	$redirect = 1;
		545	} elsif ($hdr{Status} == 303) {
		546	# even http/1.1 is unclear on how to mutate the method
		547	$method = "GET" unless $method eq "HEAD";
		548	$redirect = 1;
		549	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET\|HEAD)$/) {
		550	$redirect = 1;
		551	}
		552	}
		553
		554	my $finish = sub {
		555	$state{handle}->destroy if $state{handle};
		556	%state = ();
		557
		558	# set-cookie processing
		559	if ($arg{cookie_jar}) {
		560	for ($_[1]{"set-cookie"}) {
		561	# parse NAME=VALUE
		562	my @kv;
		563
		564	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
		565	my $name = $1;
		566	my $value = $3;
		567
		568	unless ($value) {
		569	$value = $2;
		570	$value =~ s/\\(.)/$1/gs;
		571	}
		572
		573	push @kv, $name => $value;
		574
		575	last unless /\G\s*;/gc;
		576	}
		577
		578	last unless @kv;
		579
		580	my $name = shift @kv;
		581	my %kv = (value => shift @kv, @kv);
		582
		583	my $cdom;
		584	my $cpath = (delete $kv{path}) \|\| "/";
		585
		586	if (exists $kv{domain}) {
		587	$cdom = delete $kv{domain};
		588
		589	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		590
		591	next if $cdom =~ /\.$/;
		592
		593	# this is not rfc-like and not netscape-like. go figure.
		594	my $ndots = $cdom =~ y/.//;
		595	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		596	} else {
		597	$cdom = $uhost;
		598	}
		599
		600	# store it
		601	$arg{cookie_jar}{version} = 1;
		602	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		603
		604	redo if /\G\s*,/gc;
		605	}
		606	}
		607
		608	if ($redirect && exists $hdr{location}) {
		609	# we ignore any errors, as it is very common to receive
		610	# Content-Length != 0 but no actual body
		611	# we also access %hdr, as $_[1] might be an erro
		612	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
		613	} else {
		614	$cb->($_[0], $_[1]);
		615	}
201	};	616	};
202		617
		618	my $len = $hdr{"content-length"};
		619
		620	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		621	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
		622	} elsif (
		623	$hdr{Status} =~ /^(?:1..\|[23]04)$/
		624	or $method eq "HEAD"
		625	or (defined $len && !$len)
		626	) {
		627	# no body
		628	$finish->("", \%hdr);
		629	} else {
		630	# body handling, four different code paths
		631	# for want_body_handle, on_body (2x), normal (2x)
		632	# we might read too much here, but it does not matter yet (no pers. connections)
		633	if (!$redirect && $arg{want_body_handle}) {
		634	$_[0]->on_eof (undef);
		635	$_[0]->on_error (undef);
		636	$_[0]->on_read (undef);
		637
		638	$finish->(delete $state{handle}, \%hdr);
		639
		640	} elsif ($arg{on_body}) {
		641	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
		642	if ($len) {
		643	$_[0]->on_eof (undef);
		644	$_[0]->on_read (sub {
		645	$len -= length $_[0]{rbuf};
		646
		647	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		648	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
		649
		650	$len > 0
		651	or $finish->("", \%hdr);
		652	});
		653	} else {
		654	$_[0]->on_eof (sub {
		655	$finish->("", \%hdr);
		656	});
		657	$_[0]->on_read (sub {
		658	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		659	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
		660	});
		661	}
		662	} else {
		663	$_[0]->on_eof (undef);
		664
		665	if ($len) {
		666	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
		667	$_[0]->on_read (sub {
		668	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
		669	if $len <= length $_[0]{rbuf};
		670	});
		671	} else {
		672	$_[0]->on_error (sub {
		673	$! == Errno::EPIPE \|\| !$!
		674	? $finish->(delete $_[0]{rbuf}, \%hdr)
		675	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
		676	});
		677	$_[0]->on_read (sub { });
		678	}
		679	}
		680	}
		681	});
		682	});
		683	};
		684
		685	# now handle proxy-CONNECT method
		686	if ($proxy && $uscheme eq "https") {
		687	# oh dear, we have to wrap it into a connect request
		688
		689	# maybe re-use $uauthority with patched port?
		690	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		691	$state{handle}->push_read (line => $qr_nlnl, sub {
		692	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		693	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
		694
		695	if ($2 == 200) {
		696	$rpath = $upath;
		697	&$handle_actual_request;
		698	} else {
203	%state = ();	699	%state = ();
204	$cb->($_[1], \%hdr);	700	$cb->(undef, { Status => $2, Reason => $3, URL => $url });
205	});	701	}
206	} else {
207	# too bad, need to read until we get an error or EOF,
208	# no way to detect winged data.
209	$_[0]->on_error (sub {
210	%state = ();
211	$cb->($_[0]{rbuf}, \%hdr);
212	});
213	$_[0]->on_eof (undef);
214	$_[0]->on_read (sub { });
215	}	702	});
		703	} else {
		704	&$handle_actual_request;
216	});	705	}
		706
		707	}, sub {
		708	$timeout
217	});	709	};
218	}, sub {
219	$timeout
220	};	710	};
221		711
222	defined wantarray && AnyEvent::Util::guard { %state = () }	712	defined wantarray && AnyEvent::Util::guard { %state = () }
223	}	713	}
224		714
225	sub http_get($$;@) {	715	sub http_get($@) {
226	unshift @_, "GET";	716	unshift @_, "GET";
227	&http_request	717	&http_request
228	}	718	}
229		719
		720	sub http_head($@) {
		721	unshift @_, "HEAD";
		722	&http_request
		723	}
		724
		725	sub http_post($$@) {
		726	my $url = shift;
		727	unshift @_, "POST", $url, "body";
		728	&http_request
		729	}
		730
		731	=back
		732
230	=head2 GLOBAL VARIABLES	733	=head2 GLOBAL FUNCTIONS AND VARIABLES
231		734
232	=over 4	735	=over 4
233		736
		737	=item AnyEvent::HTTP::set_proxy "proxy-url"
		738
		739	Sets the default proxy server to use. The proxy-url must begin with a
		740	string of the form C<http://host:port> (optionally C<https:...>).
		741
234	=item $AnyEvent::HTTP::MAX_REDIRECTS	742	=item $AnyEvent::HTTP::MAX_RECURSE
235		743
236	The default value for the C<max_redirects> request parameter	744	The default value for the C<recurse> request parameter (default: C<10>).
237	(default: C<10>).
238		745
239	=item $AnyEvent::HTTP::USERAGENT	746	=item $AnyEvent::HTTP::USERAGENT
240		747
241	The default value for the C<User-Agent> header (the default is	748	The default value for the C<User-Agent> header (the default is
242	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	749	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
243		750
244	=item $AnyEvent::HTTP::MAX_PERSISTENT	751	=item $AnyEvent::HTTP::MAX_PER_HOST
245		752
246	The maximum number of persistent connections to keep open (default: 8).	753	The maximum number of concurrent connections to the same host (identified
		754	by the hostname). If the limit is exceeded, then the additional requests
		755	are queued until previous connections are closed.
247		756
248	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	757	The default value for this is C<4>, and it is highly advisable to not
		758	increase it.
249		759
250	The maximum time to cache a persistent connection, in seconds (default: 15).	760	=item $AnyEvent::HTTP::ACTIVE
		761
		762	The number of active connections. This is not the number of currently
		763	running requests, but the number of currently open and non-idle TCP
		764	connections. This number of can be useful for load-leveling.
251		765
252	=back	766	=back
253		767
254	=cut	768	=cut
255		769
		770	sub set_proxy($) {
		771	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;
		772	}
		773
		774	# initialise proxy from environment
		775	set_proxy $ENV{http_proxy};
		776
256	=head1 SEE ALSO	777	=head1 SEE ALSO
257		778
258	L<AnyEvent>.	779	L<AnyEvent>.
259		780
260	=head1 AUTHOR	781	=head1 AUTHOR
261		782
262	Marc Lehmann <schmorp@schmorp.de>	783	Marc Lehmann <schmorp@schmorp.de>
263	http://home.schmorp.de/	784	http://home.schmorp.de/
		785
		786	With many thanks to Дмитрий Шалашов, who provided countless
		787	testcases and bugreports.
264		788
265	=cut	789	=cut
266		790
267	1	791	1
268		792

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.1 by root, Tue Jun 3 16:37:13 2008 UTC vs. Revision 1.49 by root, Wed Aug 5 16:23:48 2009 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.1 by root, Tue Jun 3 16:37:13 2008 UTC vs.
Revision 1.49 by root, Wed Aug 5 16:23:48 2009 UTC