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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.2 by root, Wed Jun 4 11:37:41 2008 UTC vs.
Revision 1.43 by root, Mon Jul 6 03:03:12 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 4.452 ();
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 = '1.12';
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_REDIRECTS = 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.
		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.
56		88
57	=item http_request $method => $url, key => value..., $cb->($data, $headers)	89	=item http_request $method => $url, key => value..., $cb->($data, $headers)
58		90
59	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL	91	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
60	must be an absolute http or https URL.	92	must be an absolute http or https URL.
61		93
		94	When called in void context, nothing is returned. In other contexts,
		95	C<http_request> returns a "cancellation guard" - you have to keep the
		96	object at least alive until the callback get called. If the object gets
		97	destroyed before the callbakc is called, the request will be cancelled.
		98
62	The callback will be called with the response data as first argument	99	The callback will be called with the response body data as first argument
63	(or C<undef> if it wasn't available due to errors), and a hash-ref with	100	(or C<undef> if an error occured), and a hash-ref with response headers as
64	response headers as second argument.	101	second argument.
65		102
66	All the headers in that has are lowercased. In addition to the response	103	All the headers in that hash are lowercased. In addition to the response
67	headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and	104	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
68	C<Reason> contain the three parts of the HTTP Status-Line of the same	105	contain the three parts of the HTTP Status-Line of the same name. The
69	name.	106	pseudo-header C<URL> contains the original URL (which can differ from the
		107	requested URL when following redirects).
		108
		109	If the server sends a header multiple times, then their contents will be
		110	joined together with a comma (C<,>), as per the HTTP spec.
70		111
71	If an internal error occurs, such as not being able to resolve a hostname,	112	If an internal error occurs, such as not being able to resolve a hostname,
72	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	113	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
73	and the C<Reason> pseudo-header will contain an error message.	114	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		115	message.
		116
		117	A typical callback might look like this:
		118
		119	sub {
		120	my ($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	}
74		128
75	Additional parameters are key-value pairs, and are fully optional. They	129	Additional parameters are key-value pairs, and are fully optional. They
76	include:	130	include:
77		131
78	=over 4	132	=over 4
79		133
80	=item recurse => $boolean (default: true)	134	=item recurse => $count (default: $MAX_RECURSE)
81		135
82	Whether to recurse requests or not, e.g. on redirects, authentication	136	Whether to recurse requests or not, e.g. on redirects, authentication
83	retries and so on.	137	retries and so on, and how often to do so.
84		138
85	=item headers => hashref	139	=item headers => hashref
86		140
87	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:>.
88		144
89	=item timeout => $seconds	145	=item timeout => $seconds
90		146
91	The time-out to use for various stages - each connect attempt will reset	147	The time-out to use for various stages - each connect attempt will reset
92	the timeout, as will read or write activity. Default timeout is 5 minutes.	148	the timeout, as will read or write activity. Default timeout is 5 minutes.
…		…
97	default proxy (as specified by C<$ENV{http_proxy}>) is used.	153	default proxy (as specified by C<$ENV{http_proxy}>) is used.
98		154
99	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	155	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for
100	HTTPS.	156	HTTPS.
101		157
		158	=item body => $string
		159
		160	The request body, usually empty. Will be-sent as-is (future versions of
		161	this module might offer more options).
		162
		163	=item cookie_jar => $hash_ref
		164
		165	Passing this parameter enables (simplified) cookie-processing, loosely
		166	based on the original netscape specification.
		167
		168	The C<$hash_ref> must be an (initially empty) hash reference which will
		169	get updated automatically. It is possible to save the cookie_jar to
		170	persistent storage with something like JSON or Storable, but this is not
		171	recommended, as expiry times are currently being ignored.
		172
		173	Note that this cookie implementation is not of very high quality, nor
		174	meant to be complete. If you want complete cookie management you have to
		175	do that on your own. C<cookie_jar> is meant as a quick fix to get some
		176	cookie-using sites working. Cookies are a privacy disaster, do not use
		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.
		249
102	=back	250	=back
103		251
104	=back	252	Example: make a simple HTTP GET request for http://www.nethype.de/
		253
		254	http_request GET => "http://www.nethype.de/", sub {
		255	my ($body, $hdr) = @_;
		256	print "$body\n";
		257	};
		258
		259	Example: make a HTTP HEAD request on https://www.google.com/, use a
		260	timeout of 30 seconds.
		261
		262	http_request
		263	GET => "https://www.google.com",
		264	timeout => 30,
		265	sub {
		266	my ($body, $hdr) = @_;
		267	use Data::Dumper;
		268	print Dumper $hdr;
		269	}
		270	;
		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 $request;
105		281
106	=cut	282	=cut
107		283
		284	sub _slot_schedule;
		285	sub _slot_schedule($) {
		286	my $host = shift;
		287
		288	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
		289	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
		290	# somebody wants that slot
		291	++$CO_SLOT{$host}[0];
		292	++$ACTIVE;
		293
		294	$cb->(AnyEvent::Util::guard {
		295	--$ACTIVE;
		296	--$CO_SLOT{$host}[0];
		297	_slot_schedule $host;
		298	});
		299	} else {
		300	# nobody wants the slot, maybe we can forget about it
		301	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
		302	last;
		303	}
		304	}
		305	}
		306
		307	# wait for a free slot on host, call callback
		308	sub _get_slot($$) {
		309	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
		310
		311	_slot_schedule $_[0];
		312	}
		313
		314	our $qr_nl = qr<\015?\012>;
		315	our $qr_nlnl = qr<\015?\012\015?\012>;
		316
		317	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		318	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		319
108	sub http_request($$$;@) {	320	sub http_request($$@) {
109	my $cb = pop;	321	my $cb = pop;
110	my ($method, $url, %arg) = @_;	322	my ($method, $url, %arg) = @_;
111		323
112	my %hdr;	324	my %hdr;
113		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";
		328
		329	$method = uc $method;
		330
114	if (my $hdr = delete $arg{headers}) {	331	if (my $hdr = $arg{headers}) {
115	while (my ($k, $v) = each %$hdr) {	332	while (my ($k, $v) = each %$hdr) {
116	$hdr{lc $k} = $v;	333	$hdr{lc $k} = $v;
117	}	334	}
118	}	335	}
119		336
		337	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
		338
		339	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
		340	if $recurse < 0;
		341
120	my $proxy = $arg{proxy} \|\| $PROXY;	342	my $proxy = $arg{proxy} \|\| $PROXY;
121	my $timeout = $arg{timeout} \|\| $TIMEOUT;	343	my $timeout = $arg{timeout} \|\| $TIMEOUT;
122		344
		345	my ($uscheme, $uauthority, $upath, $query, $fragment) =
		346	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;
		347
		348	$uscheme = lc $uscheme;
		349
		350	my $uport = $uscheme eq "http" ? 80
		351	: $uscheme eq "https" ? 443
		352	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });
		353
		354	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
		355	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
		356
		357	my $uhost = $1;
		358	$uport = $2 if defined $2;
		359
		360	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";
		361
		362	$uhost =~ s/^\[(.*)\]$/$1/;
		363	$upath .= "?$query" if length $query;
		364
		365	$upath =~ s%^/?%/%;
		366
		367	# cookie processing
		368	if (my $jar = $arg{cookie_jar}) {
		369	%$jar = () if $jar->{version} != 1;
		370
		371	my @cookie;
		372
		373	while (my ($chost, $v) = each %$jar) {
		374	if ($chost =~ /^\./) {
		375	next unless $chost eq substr $uhost, -length $chost;
		376	} elsif ($chost =~ /\./) {
		377	next unless $chost eq $uhost;
		378	} else {
		379	next;
		380	}
		381
		382	while (my ($cpath, $v) = each %$v) {
		383	next unless $cpath eq substr $upath, 0, length $cpath;
		384
		385	while (my ($k, $v) = each %$v) {
		386	next if $uscheme ne "https" && exists $v->{secure};
		387	my $value = $v->{value};
		388	$value =~ s/([\\"])/\\$1/g;
		389	push @cookie, "$k=\"$value\"";
		390	}
		391	}
		392	}
		393
		394	$hdr{cookie} = join "; ", @cookie
		395	if @cookie;
		396	}
		397
		398	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
		399
		400	if ($proxy) {
		401	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
		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" && $rscheme eq "https";
		406	} else {
		407	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
		408	}
		409
123	$hdr{"user-agent"} \|\|= $USERAGENT;	410	$hdr{"user-agent"} \|\|= $USERAGENT;
		411	$hdr{referer} \|\|= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
124		412
125	my ($host, $port, $path, $scheme);
126
127	if ($proxy) {
128	($host, $port, $scheme) = @$proxy;
129	$path = $url;
130	} else {
131	($scheme, my $authority, $path, my $query, my $fragment) =
132	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;
133
134	$port = $scheme eq "http" ? 80
135	: $scheme eq "https" ? 443
136	: croak "$url: only http and https URLs supported";
137
138	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
139	or croak "$authority: unparsable URL";
140
141	$host = $1;
142	$port = $2 if defined $2;
143
144	$host =~ s/^\[(.*)\]$/$1/;
145	$path .= "?$query" if length $query;
146
147	$path = "/" unless $path;
148
149	$hdr{host} = $host = lc $host;
150	}
151
152	$scheme = lc $scheme;
153
154	my %state;
155
156	my $body = "";
157	$state{body} = $body;
158
159	$hdr{"content-length"} = length $body;	413	$hdr{"content-length"} = length $arg{body};
160		414
		415	my %state = (connect_guard => 1);
		416
		417	_get_slot $uhost, sub {
		418	$state{slot_guard} = shift;
		419
		420	return unless $state{connect_guard};
		421
161	$state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub {	422	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
162	$state{fh} = shift	423	$state{fh} = shift
163	or return $cb->(undef, { Status => 599, Reason => "$!" });	424	or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url }));
		425	pop; # free memory, save a tree
164		426
165	delete $state{connect_guard}; # reduce memory usage, save a tree	427	return unless delete $state{connect_guard};
166		428
167	# get handle	429	# get handle
168	$state{handle} = new AnyEvent::Handle	430	$state{handle} = new AnyEvent::Handle
169	fh => $state{fh},	431	fh => $state{fh},
170	($scheme eq "https" ? (tls => "connect") : ());	432	timeout => $timeout,
		433	peername => $rhost,
		434	tls_ctx => $arg{tls_ctx};
171		435
172	# limit the number of persistent connections	436	# limit the number of persistent connections
		437	# keepalive not yet supported
173	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	438	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
174	++$KA_COUNT{$_[1]};	439	++$KA_COUNT{$_[1]};
175	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	440	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		441	--$KA_COUNT{$_[1]}
		442	};
176	$hdr{connection} = "keep-alive";	443	$hdr{connection} = "keep-alive";
177	delete $hdr{connection}; # keep-alive not yet supported
178	} else {	444	} else {
179	delete $hdr{connection};	445	delete $hdr{connection};
180	}	446	}
181		447
182	# (re-)configure handle	448	# (re-)configure handle
183	$state{handle}->timeout ($timeout);
184	$state{handle}->on_error (sub {	449	$state{handle}->on_error (sub {
185	%state = ();	450	%state = ();
186	$cb->(undef, { Status => 599, Reason => "$!" });	451	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
187	});	452	});
188	$state{handle}->on_eof (sub {	453	$state{handle}->on_eof (sub {
189	%state = ();	454	%state = ();
190	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });	455	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
191	});
192
193	# send request
194	$state{handle}->push_write (
195	"\U$method\E $path HTTP/1.0\015\012"
196	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
197	. "\015\012"
198	. (delete $state{body})
199	);
200
201	%hdr = (); # reduce memory usage, save a kitten
202
203	# status line
204	$state{handle}->push_read (line => qr/\015?\012/, sub {
205	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
206	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
207
208	my %hdr = ( # response headers
209	HTTPVersion => ",$1",
210	Status => ",$2",
211	Reason => ",$3",
212	);	456	});
213		457
		458	$state{handle}->starttls ("connect") if $rscheme eq "https";
		459
		460	# handle actual, non-tunneled, request
		461	my $handle_actual_request = sub {
		462	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		463
		464	# send request
		465	$state{handle}->push_write (
		466	"$method $rpath HTTP/1.0\015\012"
		467	. (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
		468	. "\015\012"
		469	. (delete $arg{body})
		470	);
		471
		472	%hdr = (); # reduce memory usage, save a kitten
		473
		474	# status line
		475	$state{handle}->push_read (line => $qr_nl, sub {
		476	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		477	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
		478
		479	my %hdr = ( # response headers
		480	HTTPVersion => ",$1",
		481	Status => ",$2",
		482	Reason => ",$3",
		483	URL => ",$url"
		484	);
		485
214	# headers, could be optimized a bit	486	# headers, could be optimized a bit
215	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {	487	$state{handle}->unshift_read (line => $qr_nlnl, sub {
216	for ("$_[1]\012") {	488	for ("$_[1]\012") {
217	# we support spaces in field names, as lotus domino	489	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
218	# creates them.	490
		491	# things seen, not parsed:
		492	# p3pP="NON CUR OTPi OUR NOR UNI"
		493
219	$hdr{lc $1} .= ",$2"	494	$hdr{lc $1} .= ",$2"
220	while /\G	495	while /\G
221	([^:\000-\037]+):	496	([^:\000-\037]*):
222	[\011\040]*	497	[\011\040]*
223	((?: [^\015\012]+ \| \015?\012[\011\040] )*)	498	((?: [^\012]+ \| \012[\011\040] )*)
224	\015?\012	499	\012
225	/gxc;	500	/gxc;
226		501
227	/\G$/	502	/\G$/
228	or return $cb->(undef, { Status => 599, Reason => "garbled response headers" });	503	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
229	}	504	}
230		505
231	substr $_, 0, 1, ""	506	substr $_, 0, 1, ""
232	for values %hdr;	507	for values %hdr;
233		508
234	if (exists $hdr{"content-length"}) {	509	# redirect handling
235	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	510	# microsoft and other shitheads don't give a shit for following standards,
236	# could cache persistent connection now	511	# try to support some common forms of broken Location headers.
237	if ($hdr{connection} =~ /\bkeep-alive\b/i) {	512	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
238	# but we don't, due to misdesigns, this is annoyingly complex	513	$hdr{location} =~ s/^\.\/+//;
		514
		515	my $url = "$rscheme://$uhost:$uport";
		516
		517	unless ($hdr{location} =~ s/^\///) {
		518	$url .= $upath;
		519	$url =~ s/\/[^\/]*$//;
		520	}
		521
		522	$hdr{location} = "$url/$hdr{location}";
		523	}
		524
		525	my $redirect;
		526
		527	if ($recurse) {
		528	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
		529	# apparently, mozilla et al. just change POST to GET here
		530	# more research is needed before we do the same
		531	$redirect = 1;
		532	} elsif ($hdr{Status} == 303) {
		533	# even http/1.1 is unclear on how to mutate the method
		534	$method = "GET" unless $method eq "HEAD";
		535	$redirect = 1;
		536	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET\|HEAD)$/) {
		537	$redirect = 1;
		538	}
		539	}
		540
		541	my $finish = sub {
		542	$state{handle}->destroy if $state{handle};
		543	%state = ();
		544
		545	# set-cookie processing
		546	if ($arg{cookie_jar}) {
		547	for ($_[1]{"set-cookie"}) {
		548	# parse NAME=VALUE
		549	my @kv;
		550
		551	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
		552	my $name = $1;
		553	my $value = $3;
		554
		555	unless ($value) {
		556	$value = $2;
		557	$value =~ s/\\(.)/$1/gs;
		558	}
		559
		560	push @kv, $name => $value;
		561
		562	last unless /\G\s*;/gc;
		563	}
		564
		565	last unless @kv;
		566
		567	my $name = shift @kv;
		568	my %kv = (value => shift @kv, @kv);
		569
		570	my $cdom;
		571	my $cpath = (delete $kv{path}) \|\| "/";
		572
		573	if (exists $kv{domain}) {
		574	$cdom = delete $kv{domain};
		575
		576	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		577
		578	next if $cdom =~ /\.$/;
		579
		580	# this is not rfc-like and not netscape-like. go figure.
		581	my $ndots = $cdom =~ y/.//;
		582	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		583	} else {
		584	$cdom = $uhost;
		585	}
		586
		587	# store it
		588	$arg{cookie_jar}{version} = 1;
		589	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		590
		591	redo if /\G\s*,/gc;
		592	}
		593	}
		594
		595	if ($redirect) {
		596	# we ignore any errors, as it is very common to receive
		597	# Content-Length != 0 but no actual body
		598	# we also access %hdr, as $_[1] might be an erro
		599	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
		600	} else {
		601	$cb->($_[0], $_[1]);
		602	}
239	};	603	};
240		604
		605	my $len = $hdr{"content-length"};
		606
		607	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		608	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
		609	} elsif (
		610	$hdr{Status} =~ /^(?:1..\|[23]04)$/
		611	or $method eq "HEAD"
		612	or (defined $len && !$len)
		613	) {
		614	# no body
		615	$finish->("", \%hdr);
		616	} else {
		617	# body handling, four different code paths
		618	# for want_body_handle, on_body (2x), normal (2x)
		619	# we might read too much here, but it does not matter yet (no pers. connections)
		620	if (!$redirect && $arg{want_body_handle}) {
		621	$_[0]->on_eof (undef);
		622	$_[0]->on_error (undef);
		623	$_[0]->on_read (undef);
		624
		625	$finish->(delete $state{handle}, \%hdr);
		626
		627	} elsif ($arg{on_body}) {
		628	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
		629	if ($len) {
		630	$_[0]->on_eof (undef);
		631	$_[0]->on_read (sub {
		632	$len -= length $_[0]{rbuf};
		633
		634	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		635	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
		636
		637	$len > 0
		638	or $finish->("", \%hdr);
		639	});
		640	} else {
		641	$_[0]->on_eof (sub {
		642	$finish->("", \%hdr);
		643	});
		644	$_[0]->on_read (sub {
		645	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		646	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
		647	});
		648	}
		649	} else {
		650	$_[0]->on_eof (undef);
		651
		652	if ($len) {
		653	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
		654	$_[0]->on_read (sub {
		655	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
		656	if $len <= length $_[0]{rbuf};
		657	});
		658	} else {
		659	$_[0]->on_error (sub {
		660	$! == Errno::EPIPE \|\| !$!
		661	? $finish->(delete $_[0]{rbuf}, \%hdr)
		662	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
		663	});
		664	$_[0]->on_read (sub { });
		665	}
		666	}
		667	}
		668	});
		669	});
		670	};
		671
		672	# now handle proxy-CONNECT method
		673	if ($proxy && $uscheme eq "https") {
		674	# oh dear, we have to wrap it into a connect request
		675
		676	# maybe re-use $uauthority with patched port?
		677	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		678	$state{handle}->push_read (line => $qr_nlnl, sub {
		679	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		680	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
		681
		682	if ($2 == 200) {
		683	$rpath = $upath;
		684	&$handle_actual_request;
		685	} else {
241	%state = ();	686	%state = ();
242	$cb->($_[1], \%hdr);	687	$cb->(undef, { Status => $2, Reason => $3, URL => $url });
243	});	688	}
244	} else {
245	# too bad, need to read until we get an error or EOF,
246	# no way to detect winged data.
247	$_[0]->on_error (sub {
248	%state = ();
249	$cb->($_[0]{rbuf}, \%hdr);
250	});
251	$_[0]->on_eof (undef);
252	$_[0]->on_read (sub { });
253	}	689	});
		690	} else {
		691	&$handle_actual_request;
254	});	692	}
		693
		694	}, sub {
		695	$timeout
255	});	696	};
256	}, sub {
257	$timeout
258	};	697	};
259		698
260	defined wantarray && AnyEvent::Util::guard { %state = () }	699	defined wantarray && AnyEvent::Util::guard { %state = () }
261	}	700	}
262		701
263	sub http_get($$;@) {	702	sub http_get($@) {
264	unshift @_, "GET";	703	unshift @_, "GET";
265	&http_request	704	&http_request
266	}	705	}
267		706
		707	sub http_head($@) {
		708	unshift @_, "HEAD";
		709	&http_request
		710	}
		711
		712	sub http_post($$@) {
		713	my $url = shift;
		714	unshift @_, "POST", $url, "body";
		715	&http_request
		716	}
		717
		718	=back
		719
268	=head2 GLOBAL FUNCTIONS AND VARIABLES	720	=head2 GLOBAL FUNCTIONS AND VARIABLES
269		721
270	=over 4	722	=over 4
271		723
272	=item AnyEvent::HTTP::set_proxy "proxy-url"	724	=item AnyEvent::HTTP::set_proxy "proxy-url"
273		725
274	Sets the default proxy server to use. The proxy-url must begin with a	726	Sets the default proxy server to use. The proxy-url must begin with a
275	string of the form C<http://host:port> (optionally C<https:...>).	727	string of the form C<http://host:port> (optionally C<https:...>).
276		728
277	=item $AnyEvent::HTTP::MAX_REDIRECTS	729	=item $AnyEvent::HTTP::MAX_RECURSE
278		730
279	The default value for the C<max_redirects> request parameter	731	The default value for the C<recurse> request parameter (default: C<10>).
280	(default: C<10>).
281		732
282	=item $AnyEvent::HTTP::USERAGENT	733	=item $AnyEvent::HTTP::USERAGENT
283		734
284	The default value for the C<User-Agent> header (the default is	735	The default value for the C<User-Agent> header (the default is
285	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	736	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
286		737
287	=item $AnyEvent::HTTP::MAX_PERSISTENT	738	=item $AnyEvent::HTTP::MAX_PER_HOST
288		739
289	The maximum number of persistent connections to keep open (default: 8).	740	The maximum number of concurrent conenctions to the same host (identified
		741	by the hostname). If the limit is exceeded, then the additional requests
		742	are queued until previous connections are closed.
290		743
291	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	744	The default value for this is C<4>, and it is highly advisable to not
		745	increase it.
292		746
293	The maximum time to cache a persistent connection, in seconds (default: 2).	747	=item $AnyEvent::HTTP::ACTIVE
		748
		749	The number of active connections. This is not the number of currently
		750	running requests, but the number of currently open and non-idle TCP
		751	connections. This number of can be useful for load-leveling.
294		752
295	=back	753	=back
296		754
297	=cut	755	=cut
298		756
…		…
307		765
308	L<AnyEvent>.	766	L<AnyEvent>.
309		767
310	=head1 AUTHOR	768	=head1 AUTHOR
311		769
312	Marc Lehmann <schmorp@schmorp.de>	770	Marc Lehmann <schmorp@schmorp.de>
313	http://home.schmorp.de/	771	http://home.schmorp.de/
		772
		773	With many thanks to Дмитрий Шалашов, who provided countless
		774	testcases and bugreports.
314		775
315	=cut	776	=cut
316		777
317	1	778	1
318		779

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.2 by root, Wed Jun 4 11:37:41 2008 UTC vs. Revision 1.43 by root, Mon Jul 6 03:03:12 2009 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.2 by root, Wed Jun 4 11:37:41 2008 UTC vs.
Revision 1.43 by root, Mon Jul 6 03:03:12 2009 UTC