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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.5 by root, Wed Jun 4 12:03:47 2008 UTC vs.
Revision 1.41 by root, Sun Jul 5 23:50:59 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_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 = 2;
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, $headers)
63		84
64	Executes an HTTP-POST request with a requets body of C<$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<$method> (e.g. C<GET>, C<POST>). The URL
70	must be an absolute http or https URL.	92	must be an absolute http or https URL.
		93
		94	When called in void context, nothing is returned. In other contexts,
		95	C<http_request> returns a "cancellation guard" - you have to keep the
		96	object at least alive until the callback get called. If the object gets
		97	destroyed before the callbakc is called, the request will be cancelled.
71		98
72	The callback will be called with the response data as first argument	99	The callback will be called with the response data as first argument
73	(or C<undef> if it wasn't available due to errors), and a hash-ref with	100	(or C<undef> if it wasn't available due to errors), and a hash-ref with
74	response headers as second argument.	101	response headers as second argument.
75		102
76	All the headers in that has are lowercased. In addition to the response	103	All the headers in that hash are lowercased. In addition to the response
77	headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and	104	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
78	C<Reason> contain the three parts of the HTTP Status-Line of the same	105	contain the three parts of the HTTP Status-Line of the same name. The
79	name.	106	pseudo-header C<URL> contains the original URL (which can differ from the
		107	requested URL when following redirects).
		108
		109	If the server sends a header multiple times, then their contents will be
		110	joined together with a comma (C<,>), as per the HTTP spec.
80		111
81	If an internal error occurs, such as not being able to resolve a hostname,	112	If an internal error occurs, such as not being able to resolve a hostname,
82	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	113	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
83	and the C<Reason> pseudo-header will contain an error message.	114	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		115	message.
		116
		117	A typical callback might look like this:
		118
		119	sub {
		120	my ($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	}
84		128
85	Additional parameters are key-value pairs, and are fully optional. They	129	Additional parameters are key-value pairs, and are fully optional. They
86	include:	130	include:
87		131
88	=over 4	132	=over 4
…		…
92	Whether to recurse requests or not, e.g. on redirects, authentication	136	Whether to recurse requests or not, e.g. on redirects, authentication
93	retries and so on, and how often to do so.	137	retries and so on, and how often to do so.
94		138
95	=item headers => hashref	139	=item headers => hashref
96		140
97	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:>.
98		144
99	=item timeout => $seconds	145	=item timeout => $seconds
100		146
101	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
102	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.
…		…
112	=item body => $string	158	=item body => $string
113		159
114	The request body, usually empty. Will be-sent as-is (future versions of	160	The request body, usually empty. Will be-sent as-is (future versions of
115	this module might offer more options).	161	this module might offer more options).
116		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 => $callback->($hdr)
		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	=item on_body => $callback->($data, $hdr)
		206
		207	When specified, all body data will be "filtered" through this callback.
		208
		209	The callback will incrementally receive body data, and is supposed to
		210	return it or a modified version of it (empty strings are valid returns).
		211
		212	If the callback returns C<undef>, then the request will be cancelled.
		213
		214	This callback is useful when you want to do some processing on the data,
		215	or the data is too large to be held in memory (so the callback writes it
		216	to a file and returns the empty string) and so on.
		217
		218	It is usually preferred over doing your own body handling via
		219	C<want_body_handle>.
		220
		221	=item want_body_handle => $enable
		222
		223	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		224	changes considerably: after parsing the headers, and instead of
		225	downloading the body (if any), the completion callback will be
		226	called. Instead of the C<$body> argument containing the body data, the
		227	callback will receive the L<AnyEvent::Handle> object associated with the
		228	connection. In error cases, C<undef> will be passed. When there is no body
		229	(e.g. status C<304>), the empty string will be passed.
		230
		231	The handle object might or might not be in TLS mode, might be connected to
		232	a proxy, be a persistent connection etc., and configured in unspecified
		233	ways. The user is responsible for this handle (it will not be used by this
		234	module anymore).
		235
		236	This is useful with some push-type services, where, after the initial
		237	headers, an interactive protocol is used (typical example would be the
		238	push-style twitter API which starts a JSON/XML stream).
		239
		240	If you think you need this, first have a look at C<on_body>, to see if
		241	that doesn'T solve your problem in a better way.
		242
117	=back	243	=back
118		244
119	=back	245	Example: make a simple HTTP GET request for http://www.nethype.de/
		246
		247	http_request GET => "http://www.nethype.de/", sub {
		248	my ($body, $hdr) = @_;
		249	print "$body\n";
		250	};
		251
		252	Example: make a HTTP HEAD request on https://www.google.com/, use a
		253	timeout of 30 seconds.
		254
		255	http_request
		256	GET => "https://www.google.com",
		257	timeout => 30,
		258	sub {
		259	my ($body, $hdr) = @_;
		260	use Data::Dumper;
		261	print Dumper $hdr;
		262	}
		263	;
		264
		265	Example: make another simple HTTP GET request, but immediately try to
		266	cancel it.
		267
		268	my $request = http_request GET => "http://www.nethype.de/", sub {
		269	my ($body, $hdr) = @_;
		270	print "$body\n";
		271	};
		272
		273	undef $request;
120		274
121	=cut	275	=cut
122		276
		277	sub _slot_schedule;
		278	sub _slot_schedule($) {
		279	my $host = shift;
		280
		281	while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
		282	if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
		283	# somebody wants that slot
		284	++$CO_SLOT{$host}[0];
		285	++$ACTIVE;
		286
		287	$cb->(AnyEvent::Util::guard {
		288	--$ACTIVE;
		289	--$CO_SLOT{$host}[0];
		290	_slot_schedule $host;
		291	});
		292	} else {
		293	# nobody wants the slot, maybe we can forget about it
		294	delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
		295	last;
		296	}
		297	}
		298	}
		299
		300	# wait for a free slot on host, call callback
		301	sub _get_slot($$) {
		302	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
		303
		304	_slot_schedule $_[0];
		305	}
		306
		307	our $qr_nl = qr<\015?\012>;
		308	our $qr_nlnl = qr<\015?\012\015?\012>;
		309
		310	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		311	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		312
123	sub http_request($$$;@) {	313	sub http_request($$@) {
124	my $cb = pop;	314	my $cb = pop;
125	my ($method, $url, %arg) = @_;	315	my ($method, $url, %arg) = @_;
126		316
127	my %hdr;	317	my %hdr;
128		318
		319	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		320	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
		321
129	$method = uc $method;	322	$method = uc $method;
130		323
131	if (my $hdr = delete $arg{headers}) {	324	if (my $hdr = $arg{headers}) {
132	while (my ($k, $v) = each %$hdr) {	325	while (my ($k, $v) = each %$hdr) {
133	$hdr{lc $k} = $v;	326	$hdr{lc $k} = $v;
134	}	327	}
135	}	328	}
136		329
		330	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
		331
		332	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
		333	if $recurse < 0;
		334
137	my $proxy = $arg{proxy} \|\| $PROXY;	335	my $proxy = $arg{proxy} \|\| $PROXY;
138	my $timeout = $arg{timeout} \|\| $TIMEOUT;	336	my $timeout = $arg{timeout} \|\| $TIMEOUT;
139	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;	337
		338	my ($uscheme, $uauthority, $upath, $query, $fragment) =
		339	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;
		340
		341	$uscheme = lc $uscheme;
		342
		343	my $uport = $uscheme eq "http" ? 80
		344	: $uscheme eq "https" ? 443
		345	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });
		346
		347	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
		348	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
		349
		350	my $uhost = $1;
		351	$uport = $2 if defined $2;
		352
		353	$uhost =~ s/^\[(.*)\]$/$1/;
		354	$upath .= "?$query" if length $query;
		355
		356	$upath =~ s%^/?%/%;
		357
		358	# cookie processing
		359	if (my $jar = $arg{cookie_jar}) {
		360	%$jar = () if $jar->{version} != 1;
		361
		362	my @cookie;
		363
		364	while (my ($chost, $v) = each %$jar) {
		365	if ($chost =~ /^\./) {
		366	next unless $chost eq substr $uhost, -length $chost;
		367	} elsif ($chost =~ /\./) {
		368	next unless $chost eq $uhost;
		369	} else {
		370	next;
		371	}
		372
		373	while (my ($cpath, $v) = each %$v) {
		374	next unless $cpath eq substr $upath, 0, length $cpath;
		375
		376	while (my ($k, $v) = each %$v) {
		377	next if $uscheme ne "https" && exists $v->{secure};
		378	my $value = $v->{value};
		379	$value =~ s/([\\"])/\\$1/g;
		380	push @cookie, "$k=\"$value\"";
		381	}
		382	}
		383	}
		384
		385	$hdr{cookie} = join "; ", @cookie
		386	if @cookie;
		387	}
		388
		389	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
		390
		391	if ($proxy) {
		392	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
		393
		394	# don't support https requests over https-proxy transport,
		395	# can't be done with tls as spec'ed, unless you double-encrypt.
		396	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
		397	} else {
		398	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
		399	}
140		400
141	$hdr{"user-agent"} \|\|= $USERAGENT;	401	$hdr{"user-agent"} \|\|= $USERAGENT;
		402	$hdr{referer} \|\|= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
142		403
143	my ($host, $port, $path, $scheme);	404	$hdr{host} = "$uhost:$uport";
144
145	if ($proxy) {
146	($host, $port, $scheme) = @$proxy;
147	$path = $url;
148	} else {
149	($scheme, my $authority, $path, my $query, my $fragment) =
150	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;
151
152	$port = $scheme eq "http" ? 80
153	: $scheme eq "https" ? 443
154	: croak "$url: only http and https URLs supported";
155
156	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
157	or croak "$authority: unparsable URL";
158
159	$host = $1;
160	$port = $2 if defined $2;
161
162	$host =~ s/^\[(.*)\]$/$1/;
163	$path .= "?$query" if length $query;
164
165	$path = "/" unless $path;
166
167	$hdr{host} = $host = lc $host;
168	}
169
170	$scheme = lc $scheme;
171
172	my %state;
173
174	$state{body} = delete $arg{body};
175
176	$hdr{"content-length"} = length $state{body};	405	$hdr{"content-length"} = length $arg{body};
177		406
		407	my %state = (connect_guard => 1);
		408
		409	_get_slot $uhost, sub {
		410	$state{slot_guard} = shift;
		411
		412	return unless $state{connect_guard};
		413
178	$state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub {	414	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
179	$state{fh} = shift	415	$state{fh} = shift
180	or return $cb->(undef, { Status => 599, Reason => "$!" });	416	or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url }));
		417	pop; # free memory, save a tree
181		418
182	delete $state{connect_guard}; # reduce memory usage, save a tree	419	return unless delete $state{connect_guard};
183		420
184	# get handle	421	# get handle
185	$state{handle} = new AnyEvent::Handle	422	$state{handle} = new AnyEvent::Handle
186	fh => $state{fh},	423	fh => $state{fh},
187	($scheme eq "https" ? (tls => "connect") : ());	424	timeout => $timeout,
		425	peername => $rhost,
		426	tls_ctx => $arg{tls_ctx};
188		427
189	# limit the number of persistent connections	428	# limit the number of persistent connections
		429	# keepalive not yet supported
190	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	430	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
191	++$KA_COUNT{$_[1]};	431	++$KA_COUNT{$_[1]};
192	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	432	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		433	--$KA_COUNT{$_[1]}
		434	};
193	$hdr{connection} = "keep-alive";	435	$hdr{connection} = "keep-alive";
194	delete $hdr{connection}; # keep-alive not yet supported
195	} else {	436	} else {
196	delete $hdr{connection};	437	delete $hdr{connection};
197	}	438	}
198		439
199	# (re-)configure handle	440	# (re-)configure handle
200	$state{handle}->timeout ($timeout);
201	$state{handle}->on_error (sub {	441	$state{handle}->on_error (sub {
202	%state = ();	442	%state = ();
203	$cb->(undef, { Status => 599, Reason => "$!" });	443	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
204	});	444	});
205	$state{handle}->on_eof (sub {	445	$state{handle}->on_eof (sub {
206	%state = ();	446	%state = ();
207	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });	447	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
208	});
209
210	# send request
211	$state{handle}->push_write (
212	"$method $path HTTP/1.0\015\012"
213	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
214	. "\015\012"
215	. (delete $state{body})
216	);
217
218	%hdr = (); # reduce memory usage, save a kitten
219
220	# status line
221	$state{handle}->push_read (line => qr/\015?\012/, sub {
222	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
223	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
224
225	my %hdr = ( # response headers
226	HTTPVersion => ",$1",
227	Status => ",$2",
228	Reason => ",$3",
229	);	448	});
230		449
		450	$state{handle}->starttls ("connect") if $rscheme eq "https";
		451
		452	# handle actual, non-tunneled, request
		453	my $handle_actual_request = sub {
		454	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		455
		456	# send request
		457	$state{handle}->push_write (
		458	"$method $rpath HTTP/1.0\015\012"
		459	. (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
		460	. "\015\012"
		461	. (delete $arg{body})
		462	);
		463
		464	%hdr = (); # reduce memory usage, save a kitten
		465
		466	# status line
		467	$state{handle}->push_read (line => $qr_nl, sub {
		468	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		469	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
		470
		471	my %hdr = ( # response headers
		472	HTTPVersion => ",$1",
		473	Status => ",$2",
		474	Reason => ",$3",
		475	URL => ",$url"
		476	);
		477
231	# headers, could be optimized a bit	478	# headers, could be optimized a bit
232	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {	479	$state{handle}->unshift_read (line => $qr_nlnl, sub {
233	for ("$_[1]\012") {	480	for ("$_[1]\012") {
234	# we support spaces in field names, as lotus domino	481	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
235	# creates them.	482
		483	# things seen, not parsed:
		484	# p3pP="NON CUR OTPi OUR NOR UNI"
		485
236	$hdr{lc $1} .= ",$2"	486	$hdr{lc $1} .= ",$2"
237	while /\G	487	while /\G
238	([^:\000-\037]+):	488	([^:\000-\037]+):
239	[\011\040]*	489	[\011\040]*
240	((?: [^\015\012]+ \| \015?\012[\011\040] )*)	490	((?: [^\012]+ \| \012[\011\040] )*)
241	\015?\012	491	\012
242	/gxc;	492	/gxc;
243		493
244	/\G$/	494	/\G$/
245	or return $cb->(undef, { Status => 599, Reason => "garbled response headers" });	495	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
246	}	496	}
247		497
248	substr $_, 0, 1, ""	498	substr $_, 0, 1, ""
249	for values %hdr;	499	for values %hdr;
250		500
251	if ($method eq "HEAD") {	501	# redirect handling
252	%state = ();	502	# microsoft and other shitheads don't give a shit for following standards,
253	$cb->(undef, \%hdr);	503	# try to support some common forms of broken Location headers.
254	} else {	504	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
255	if (exists $hdr{"content-length"}) {	505	$hdr{location} =~ s/^\.\/+//;
256	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	506
257	# could cache persistent connection now	507	my $url = "$rscheme://$uhost:$uport";
258	if ($hdr{connection} =~ /\bkeep-alive\b/i) {	508
259	# but we don't, due to misdesigns, this is annoyingly complex	509	unless ($hdr{location} =~ s/^\///) {
		510	$url .= $upath;
		511	$url =~ s/\/[^\/]*$//;
260	};	512	}
261		513
		514	$hdr{location} = "$url/$hdr{location}";
		515	}
		516
		517	my $redirect;
		518
		519	if ($recurse) {
		520	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
		521	# apparently, mozilla et al. just change POST to GET here
		522	# more research is needed before we do the same
		523	$redirect = 1;
		524	} elsif ($hdr{Status} == 303) {
		525	# even http/1.1 is unclear on how to mutate the method
		526	$method = "GET" unless $method eq "HEAD";
		527	$redirect = 1;
		528	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET\|HEAD)$/) {
		529	$redirect = 1;
		530	}
		531	}
		532
		533	my $finish = sub {
		534	$state{handle}->destroy if $state{handle};
262	%state = ();	535	%state = ();
		536
		537	# set-cookie processing
		538	if ($arg{cookie_jar}) {
		539	for ($_[1]{"set-cookie"}) {
		540	# parse NAME=VALUE
		541	my @kv;
		542
		543	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
		544	my $name = $1;
		545	my $value = $3;
		546
		547	unless ($value) {
		548	$value = $2;
		549	$value =~ s/\\(.)/$1/gs;
		550	}
		551
		552	push @kv, $name => $value;
		553
		554	last unless /\G\s*;/gc;
		555	}
		556
		557	last unless @kv;
		558
		559	my $name = shift @kv;
		560	my %kv = (value => shift @kv, @kv);
		561
		562	my $cdom;
		563	my $cpath = (delete $kv{path}) \|\| "/";
		564
		565	if (exists $kv{domain}) {
		566	$cdom = delete $kv{domain};
		567
		568	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		569
		570	next if $cdom =~ /\.$/;
		571
		572	# this is not rfc-like and not netscape-like. go figure.
		573	my $ndots = $cdom =~ y/.//;
		574	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		575	} else {
		576	$cdom = $uhost;
		577	}
		578
		579	# store it
		580	$arg{cookie_jar}{version} = 1;
		581	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		582
		583	redo if /\G\s*,/gc;
		584	}
		585	}
		586
		587	if ($redirect) {
		588	# we ignore any errors, as it is very common to receive
		589	# Content-Length != 0 but no actual body
		590	# we also access %hdr, as $_[1] might be an erro
		591	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
		592	} else {
263	$cb->($_[1], \%hdr);	593	$cb->($_[0], $_[1]);
		594	}
264	});	595	};
		596
		597	my $len = $hdr{"content-length"};
		598
		599	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		600	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
		601	} elsif (
		602	$hdr{Status} =~ /^(?:1..\|204\|304)$/
		603	or $method eq "HEAD"
		604	or (defined $len && !$len)
		605	) {
		606	# no body
		607	$finish->("", \%hdr);
		608	} else {
		609	# body handling, four different code paths
		610	# for want_body_handle, on_body (2x), normal (2x)
		611	# we might read too much here, but it does not matter yet (no pers. connections)
		612	if (!$redirect && $arg{want_body_handle}) {
		613	$_[0]->on_eof (undef);
		614	$_[0]->on_error (undef);
		615	$_[0]->on_read (undef);
		616
		617	$finish->(delete $state{handle}, \%hdr);
		618
		619	} elsif ($arg{on_body}) {
		620	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
		621	if ($len) {
		622	$_[0]->on_eof (undef);
		623	$_[0]->on_read (sub {
		624	$len -= length $_[0]{rbuf};
		625
		626	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		627	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
		628
		629	$len > 0
		630	or $finish->("", \%hdr);
		631	});
		632	} else {
		633	$_[0]->on_eof (sub {
		634	$finish->("", \%hdr);
		635	});
		636	$_[0]->on_read (sub {
		637	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		638	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
		639	});
		640	}
		641	} else {
		642	$_[0]->on_eof (undef);
		643
		644	if ($len) {
		645	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
		646	$_[0]->on_read (sub {
		647	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
		648	if $len <= length $_[0]{rbuf};
		649	});
		650	} else {
		651	$_[0]->on_error (sub {
		652	$! == Errno::EPIPE
		653	? $finish->(delete $_[0]{rbuf}, \%hdr)
		654	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
		655	});
		656	$_[0]->on_read (sub { });
		657	}
		658	}
		659	}
		660	});
		661	});
		662	};
		663
		664	# now handle proxy-CONNECT method
		665	if ($proxy && $uscheme eq "https") {
		666	# oh dear, we have to wrap it into a connect request
		667
		668	# maybe re-use $uauthority with patched port?
		669	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		670	$state{handle}->push_read (line => $qr_nlnl, sub {
		671	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		672	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
		673
		674	if ($2 == 200) {
		675	$rpath = $upath;
		676	&$handle_actual_request;
265	} else {	677	} else {
266	# too bad, need to read until we get an error or EOF,
267	# no way to detect winged data.
268	$_[0]->on_error (sub {
269	%state = ();	678	%state = ();
270	$cb->($_[0]{rbuf}, \%hdr);	679	$cb->(undef, { Status => $2, Reason => $3, URL => $url });
271	});
272	$_[0]->on_eof (undef);
273	$_[0]->on_read (sub { });
274	}	680	}
275	}	681	});
		682	} else {
		683	&$handle_actual_request;
276	});	684	}
		685
		686	}, sub {
		687	$timeout
277	});	688	};
278	}, sub {
279	$timeout
280	};	689	};
281		690
282	defined wantarray && AnyEvent::Util::guard { %state = () }	691	defined wantarray && AnyEvent::Util::guard { %state = () }
283	}	692	}
284		693
285	sub http_get($$;@) {	694	sub http_get($@) {
286	unshift @_, "GET";	695	unshift @_, "GET";
287	&http_request	696	&http_request
288	}	697	}
289		698
290	sub http_head($$;@) {	699	sub http_head($@) {
291	unshift @_, "HEAD";	700	unshift @_, "HEAD";
292	&http_request	701	&http_request
293	}	702	}
294		703
295	sub http_post($$$;@) {	704	sub http_post($$@) {
		705	my $url = shift;
296	unshift @_, "POST", "body";	706	unshift @_, "POST", $url, "body";
297	&http_request	707	&http_request
298	}	708	}
299		709
		710	=back
		711
300	=head2 GLOBAL FUNCTIONS AND VARIABLES	712	=head2 GLOBAL FUNCTIONS AND VARIABLES
301		713
302	=over 4	714	=over 4
303		715
304	=item AnyEvent::HTTP::set_proxy "proxy-url"	716	=item AnyEvent::HTTP::set_proxy "proxy-url"
…		…
311	The default value for the C<recurse> request parameter (default: C<10>).	723	The default value for the C<recurse> request parameter (default: C<10>).
312		724
313	=item $AnyEvent::HTTP::USERAGENT	725	=item $AnyEvent::HTTP::USERAGENT
314		726
315	The default value for the C<User-Agent> header (the default is	727	The default value for the C<User-Agent> header (the default is
316	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	728	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
317		729
318	=item $AnyEvent::HTTP::MAX_PERSISTENT	730	=item $AnyEvent::HTTP::MAX_PERSISTENT
319		731
320	The maximum number of persistent connections to keep open (default: 8).	732	The maximum number of persistent connections to keep open (default: 8).
321		733
…		…
324	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	736	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
325		737
326	The maximum time to cache a persistent connection, in seconds (default: 2).	738	The maximum time to cache a persistent connection, in seconds (default: 2).
327		739
328	Not implemented currently.	740	Not implemented currently.
		741
		742	=item $AnyEvent::HTTP::ACTIVE
		743
		744	The number of active connections. This is not the number of currently
		745	running requests, but the number of currently open and non-idle TCP
		746	connections. This number of can be useful for load-leveling.
329		747
330	=back	748	=back
331		749
332	=cut	750	=cut
333		751
…		…
342		760
343	L<AnyEvent>.	761	L<AnyEvent>.
344		762
345	=head1 AUTHOR	763	=head1 AUTHOR
346		764
347	Marc Lehmann <schmorp@schmorp.de>	765	Marc Lehmann <schmorp@schmorp.de>
348	http://home.schmorp.de/	766	http://home.schmorp.de/
		767
		768	With many thanks to Дмитрий Шалашов, who provided countless
		769	testcases and bugreports.
349		770
350	=cut	771	=cut
351		772
352	1	773	1
353		774

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.5 by root, Wed Jun 4 12:03:47 2008 UTC vs. Revision 1.41 by root, Sun Jul 5 23:50:59 2009 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.5 by root, Wed Jun 4 12:03:47 2008 UTC vs.
Revision 1.41 by root, Sun Jul 5 23:50:59 2009 UTC