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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.9 by root, Wed Jun 4 13:51:53 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, $headers)
63		84
64	Executes an HTTP-POST request with a request body of C<$bod>. See the	85	Executes an HTTP-POST request with a request body of C<$body>. See the
65	http_request function for details on additional parameters.	86	http_request function for details on additional parameters and the return
		87	value.
66		88
67	=item http_request $method => $url, key => value..., $cb->($data, $headers)	89	=item http_request $method => $url, key => value..., $cb->($data, $headers)
68		90
69	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL	91	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
70	must be an absolute http or https URL.	92	must be an absolute http or https URL.
		93
		94	When called in void context, nothing is returned. In other contexts,
		95	C<http_request> returns a "cancellation guard" - you have to keep the
		96	object at least alive until the callback get called. If the object gets
		97	destroyed before the callbakc is called, the request will be cancelled.
71		98
72	The callback will be called with the response data as first argument	99	The callback will be called with the response data as first argument
73	(or C<undef> if it wasn't available due to errors), and a hash-ref with	100	(or C<undef> if it wasn't available due to errors), and a hash-ref with
74	response headers as second argument.	101	response headers as second argument.
75		102
76	All the headers in that hash are lowercased. In addition to the response	103	All the headers in that hash are lowercased. In addition to the response
77	headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and	104	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
78	C<Reason> contain the three parts of the HTTP Status-Line of the same	105	contain the three parts of the HTTP Status-Line of the same name. The
79	name.	106	pseudo-header C<URL> contains the original URL (which can differ from the
		107	requested URL when following redirects).
		108
		109	If the server sends a header multiple times, then their contents will be
		110	joined together with a comma (C<,>), as per the HTTP spec.
80		111
81	If an internal error occurs, such as not being able to resolve a hostname,	112	If an internal error occurs, such as not being able to resolve a hostname,
82	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	113	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
83	and the C<Reason> pseudo-header will contain an error message.	114	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		115	message.
84		116
85	A typical callback might look like this:	117	A typical callback might look like this:
86		118
87	sub {	119	sub {
88	my ($body, $hdr) = @_;	120	my ($body, $hdr) = @_;
…		…
104	Whether to recurse requests or not, e.g. on redirects, authentication	136	Whether to recurse requests or not, e.g. on redirects, authentication
105	retries and so on, and how often to do so.	137	retries and so on, and how often to do so.
106		138
107	=item headers => hashref	139	=item headers => hashref
108		140
109	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:>.
110		144
111	=item timeout => $seconds	145	=item timeout => $seconds
112		146
113	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
114	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.
…		…
123		157
124	=item body => $string	158	=item body => $string
125		159
126	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
127	this module might offer more options).	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 => $callback->($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.
128		242
129	=back	243	=back
130		244
131	Example: make a simple HTTP GET request for http://www.nethype.de/	245	Example: make a simple HTTP GET request for http://www.nethype.de/
132		246
…		…
146	use Data::Dumper;	260	use Data::Dumper;
147	print Dumper $hdr;	261	print Dumper $hdr;
148	}	262	}
149	;	263	;
150		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 $request;
		274
151	=cut	275	=cut
152		276
		277	sub _slot_schedule;
		278	sub _slot_schedule($) {
		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($$) {
		302	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
		303
		304	_slot_schedule $_[0];
		305	}
		306
		307	our $qr_nl = qr<\015?\012>;
		308	our $qr_nlnl = qr<\015?\012\015?\012>;
		309
		310	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		311	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		312
153	sub http_request($$$;@) {	313	sub http_request($$@) {
154	my $cb = pop;	314	my $cb = pop;
155	my ($method, $url, %arg) = @_;	315	my ($method, $url, %arg) = @_;
156		316
157	my %hdr;	317	my %hdr;
		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";
158		321
159	$method = uc $method;	322	$method = uc $method;
160		323
161	if (my $hdr = $arg{headers}) {	324	if (my $hdr = $arg{headers}) {
162	while (my ($k, $v) = each %$hdr) {	325	while (my ($k, $v) = each %$hdr) {
163	$hdr{lc $k} = $v;	326	$hdr{lc $k} = $v;
164	}	327	}
165	}	328	}
166		329
167	my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;	330	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
168		331
169	return $cb->(undef, { Status => 599, Reason => "recursion limit reached" })	332	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
170	if $recurse < 0;	333	if $recurse < 0;
171		334
172	my $proxy = $arg{proxy} \|\| $PROXY;	335	my $proxy = $arg{proxy} \|\| $PROXY;
173	my $timeout = $arg{timeout} \|\| $TIMEOUT;	336	my $timeout = $arg{timeout} \|\| $TIMEOUT;
174		337
		338	my ($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	}
		400
175	$hdr{"user-agent"} \|\|= $USERAGENT;	401	$hdr{"user-agent"} \|\|= $USERAGENT;
		402	$hdr{referer} \|\|= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
176		403
177	my ($host, $port, $path, $scheme);	404	$hdr{host} = "$uhost:$uport";
178
179	if ($proxy) {
180	($host, $port, $scheme) = @$proxy;
181	$path = $url;
182	} else {
183	($scheme, my $authority, $path, my $query, my $fragment) =
184	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;
185
186	$port = $scheme eq "http" ? 80
187	: $scheme eq "https" ? 443
188	: return $cb->(undef, { Status => 599, Reason => "$url: only http and https URLs supported" });
189
190	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
191	or return $cb->(undef, { Status => 599, Reason => "$url: unparsable URL" });
192
193	$host = $1;
194	$port = $2 if defined $2;
195
196	$host =~ s/^\[(.*)\]$/$1/;
197	$path .= "?$query" if length $query;
198
199	$path = "/" unless $path;
200
201	$hdr{host} = $host = lc $host;
202	}
203
204	$scheme = lc $scheme;
205
206	my %state;
207
208	$hdr{"content-length"} = length $arg{body};	405	$hdr{"content-length"} = length $arg{body};
209		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
210	$state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub {	414	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
211	$state{fh} = shift	415	$state{fh} = shift
212	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
213		418
214	delete $state{connect_guard}; # reduce memory usage, save a tree	419	return unless delete $state{connect_guard};
215		420
216	# get handle	421	# get handle
217	$state{handle} = new AnyEvent::Handle	422	$state{handle} = new AnyEvent::Handle
218	fh => $state{fh},	423	fh => $state{fh},
219	($scheme eq "https" ? (tls => "connect") : ());	424	timeout => $timeout,
		425	peername => $rhost,
		426	tls_ctx => $arg{tls_ctx};
220		427
221	# limit the number of persistent connections	428	# limit the number of persistent connections
		429	# keepalive not yet supported
222	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	430	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
223	++$KA_COUNT{$_[1]};	431	++$KA_COUNT{$_[1]};
224	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	432	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		433	--$KA_COUNT{$_[1]}
		434	};
225	$hdr{connection} = "keep-alive";	435	$hdr{connection} = "keep-alive";
226	delete $hdr{connection}; # keep-alive not yet supported
227	} else {	436	} else {
228	delete $hdr{connection};	437	delete $hdr{connection};
229	}	438	}
230		439
231	# (re-)configure handle	440	# (re-)configure handle
232	$state{handle}->timeout ($timeout);
233	$state{handle}->on_error (sub {	441	$state{handle}->on_error (sub {
234	%state = ();	442	%state = ();
235	$cb->(undef, { Status => 599, Reason => "$!" });	443	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
236	});	444	});
237	$state{handle}->on_eof (sub {	445	$state{handle}->on_eof (sub {
238	%state = ();	446	%state = ();
239	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });	447	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
240	});
241
242	# send request
243	$state{handle}->push_write (
244	"$method $path HTTP/1.0\015\012"
245	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
246	. "\015\012"
247	. (delete $arg{body})
248	);
249
250	%hdr = (); # reduce memory usage, save a kitten
251
252	# status line
253	$state{handle}->push_read (line => qr/\015?\012/, sub {
254	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
255	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
256
257	my %hdr = ( # response headers
258	HTTPVersion => ",$1",
259	Status => ",$2",
260	Reason => ",$3",
261	);	448	});
262		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
263	# headers, could be optimized a bit	478	# headers, could be optimized a bit
264	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {	479	$state{handle}->unshift_read (line => $qr_nlnl, sub {
265	for ("$_[1]\012") {	480	for ("$_[1]\012") {
266	# 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.
267	# creates them.	482
		483	# things seen, not parsed:
		484	# p3pP="NON CUR OTPi OUR NOR UNI"
		485
268	$hdr{lc $1} .= ",$2"	486	$hdr{lc $1} .= ",$2"
269	while /\G	487	while /\G
270	([^:\000-\037]+):	488	([^:\000-\037]+):
271	[\011\040]*	489	[\011\040]*
272	((?: [^\015\012]+ \| \015?\012[\011\040] )*)	490	((?: [^\012]+ \| \012[\011\040] )*)
273	\015?\012	491	\012
274	/gxc;	492	/gxc;
275		493
276	/\G$/	494	/\G$/
277	or return $cb->(undef, { Status => 599, Reason => "garbled response headers" });	495	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
		496	}
		497
		498	substr $_, 0, 1, ""
		499	for values %hdr;
		500
		501	# redirect handling
		502	# microsoft and other shitheads don't give a shit for following standards,
		503	# try to support some common forms of broken Location headers.
		504	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		505	$hdr{location} =~ s/^\.\/+//;
		506
		507	my $url = "$rscheme://$uhost:$uport";
		508
		509	unless ($hdr{location} =~ s/^\///) {
		510	$url .= $upath;
		511	$url =~ s/\/[^\/]*$//;
		512	}
		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 $state{handle};
		535	%state = ();
		536
		537	# set-cookie processing
		538	if ($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 {
		593	$cb->($_[0], $_[1]);
		594	}
		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	});
278	}	661	});
		662	};
279		663
280	substr $_, 0, 1, ""	664	# now handle proxy-CONNECT method
281	for values %hdr;	665	if ($proxy && $uscheme eq "https") {
		666	# oh dear, we have to wrap it into a connect request
282		667
283	my $finish = sub {	668	# maybe re-use $uauthority with patched port?
284	if ($_[1]{Status} =~ /^30[12]$/ && $recurse) {	669	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
285	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);	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;
286	} else {	677	} else {
287	$cb->($_[0], $_[1]);	678	%state = ();
		679	$cb->(undef, { Status => $2, Reason => $3, URL => $url });
288	}	680	}
289	};	681	});
290
291	if ($hdr{Status} =~ /^(?:1..\|204\|304)$/ or $method eq "HEAD") {
292	%state = ();
293	$finish->(undef, \%hdr);
294	} else {	682	} else {
295	if (exists $hdr{"content-length"}) {	683	&$handle_actual_request;
296	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
297	# could cache persistent connection now
298	if ($hdr{connection} =~ /\bkeep-alive\b/i) {
299	# but we don't, due to misdesigns, this is annoyingly complex
300	};
301
302	%state = ();
303	$finish->($_[1], \%hdr);
304	});
305	} else {
306	# too bad, need to read until we get an error or EOF,
307	# no way to detect winged data.
308	$_[0]->on_error (sub {
309	%state = ();
310	$finish->($_[0]{rbuf}, \%hdr);
311	});
312	$_[0]->on_eof (undef);
313	$_[0]->on_read (sub { });
314	}
315	}
316	});	684	}
		685
		686	}, sub {
		687	$timeout
317	});	688	};
318	}, sub {
319	$timeout
320	};	689	};
321		690
322	defined wantarray && AnyEvent::Util::guard { %state = () }	691	defined wantarray && AnyEvent::Util::guard { %state = () }
323	}	692	}
324		693
325	sub http_get($$;@) {	694	sub http_get($@) {
326	unshift @_, "GET";	695	unshift @_, "GET";
327	&http_request	696	&http_request
328	}	697	}
329		698
330	sub http_head($$;@) {	699	sub http_head($@) {
331	unshift @_, "HEAD";	700	unshift @_, "HEAD";
332	&http_request	701	&http_request
333	}	702	}
334		703
335	sub http_post($$$;@) {	704	sub http_post($$@) {
		705	my $url = shift;
336	unshift @_, "POST", "body";	706	unshift @_, "POST", $url, "body";
337	&http_request	707	&http_request
338	}	708	}
339		709
340	=back	710	=back
341		711
…		…
353	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>).
354		724
355	=item $AnyEvent::HTTP::USERAGENT	725	=item $AnyEvent::HTTP::USERAGENT
356		726
357	The default value for the C<User-Agent> header (the default is	727	The default value for the C<User-Agent> header (the default is
358	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	728	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
359		729
360	=item $AnyEvent::HTTP::MAX_PERSISTENT	730	=item $AnyEvent::HTTP::MAX_PERSISTENT
361		731
362	The maximum number of persistent connections to keep open (default: 8).	732	The maximum number of persistent connections to keep open (default: 8).
363		733
…		…
366	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT	736	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
367		737
368	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).
369		739
370	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.
371		747
372	=back	748	=back
373		749
374	=cut	750	=cut
375		751
…		…
384		760
385	L<AnyEvent>.	761	L<AnyEvent>.
386		762
387	=head1 AUTHOR	763	=head1 AUTHOR
388		764
389	Marc Lehmann <schmorp@schmorp.de>	765	Marc Lehmann <schmorp@schmorp.de>
390	http://home.schmorp.de/	766	http://home.schmorp.de/
		767
		768	With many thanks to Дмитрий Шалашов, who provided countless
		769	testcases and bugreports.
391		770
392	=cut	771	=cut
393		772
394	1	773	1
395		774

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.9 by root, Wed Jun 4 13:51:53 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 1.9 by root, Wed Jun 4 13:51:53 2008 UTC vs.
Revision 1.41 by root, Sun Jul 5 23:50:59 2009 UTC