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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.27 by root, Thu Jul 24 06:01:10 2008 UTC vs.
Revision 1.56 by root, Mon Sep 6 05:30:54 2010 UTC

…		…
39	package AnyEvent::HTTP;	39	package AnyEvent::HTTP;
40		40
41	use strict;	41	use strict;
42	no warnings;	42	no warnings;
43		43
44	use Carp;	44	use Errno ();
45		45
46	use AnyEvent ();	46	use AnyEvent 5.0 ();
47	use AnyEvent::Util ();	47	use AnyEvent::Util ();
48	use AnyEvent::Socket ();	48	use AnyEvent::Socket ();
49	use AnyEvent::Handle ();	49	use AnyEvent::Handle ();
50		50
51	use base Exporter::;	51	use base Exporter::;
52		52
53	our $VERSION = '1.04';	53	our $VERSION = '1.45';
54		54
55	our @EXPORT = qw(http_get http_post http_head http_request);	55	our @EXPORT = qw(http_get http_post http_head http_request);
56		56
57	our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	57	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
58	our $MAX_RECURSE = 10;	58	our $MAX_RECURSE = 10;
59	our $MAX_PERSISTENT = 8;	59	our $MAX_PERSISTENT = 8;
60	our $PERSISTENT_TIMEOUT = 2;	60	our $PERSISTENT_TIMEOUT = 2;
61	our $TIMEOUT = 300;	61	our $TIMEOUT = 300;
62		62
63	# changing these is evil	63	# changing these is evil
64	our $MAX_PERSISTENT_PER_HOST = 2;	64	our $MAX_PERSISTENT_PER_HOST = 0;
65	our $MAX_PER_HOST = 4;	65	our $MAX_PER_HOST = 4;
66		66
67	our $PROXY;	67	our $PROXY;
68	our $ACTIVE = 0;	68	our $ACTIVE = 0;
69		69
…		…
71	my %CO_SLOT; # number of open connections, and wait queue, per host	71	my %CO_SLOT; # number of open connections, and wait queue, per host
72		72
73	=item http_get $url, key => value..., $cb->($data, $headers)	73	=item http_get $url, key => value..., $cb->($data, $headers)
74		74
75	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
76	additional parameters.	76	additional parameters and the return value.
77		77
78	=item http_head $url, key => value..., $cb->($data, $headers)	78	=item http_head $url, key => value..., $cb->($data, $headers)
79		79
80	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
81	additional parameters.	81	on additional parameters and the return value.
82		82
83	=item http_post $url, $body, key => value..., $cb->($data, $headers)	83	=item http_post $url, $body, key => value..., $cb->($data, $headers)
84		84
85	Executes an HTTP-POST request with a request body of C<$body>. See the	85	Executes an HTTP-POST request with a request body of C<$body>. See the
86	http_request function for details on additional parameters.	86	http_request function for details on additional parameters and the return
		87	value.
87		88
88	=item http_request $method => $url, key => value..., $cb->($data, $headers)	89	=item http_request $method => $url, key => value..., $cb->($data, $headers)
89		90
90	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL	91	Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
91	must be an absolute http or https URL.	92	must be an absolute http or https URL.
92		93
		94	When called in void context, nothing is returned. In other contexts,
		95	C<http_request> returns a "cancellation guard" - you have to keep the
		96	object at least alive until the callback get called. If the object gets
		97	destroyed before the callbakc is called, the request will be cancelled.
		98
93	The callback will be called with the response data as first argument	99	The callback will be called with the response body data as first argument
94	(or C<undef> if it wasn't available due to errors), and a hash-ref with	100	(or C<undef> if an error occured), and a hash-ref with response headers as
95	response headers as second argument.	101	second argument.
96		102
97	All the headers in that hash are lowercased. In addition to the response	103	All the headers in that hash are lowercased. In addition to the response
98	headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>	104	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
		105	response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
99	contain the three parts of the HTTP Status-Line of the same name. The	106	three parts of the HTTP Status-Line of the same name.
		107
100	pseudo-header C<URL> contains the original URL (which can differ from the	108	The pseudo-header C<URL> contains the actual URL (which can differ from
101	requested URL when following redirects).	109	the requested URL when following redirects - for example, you might get
		110	an error that your URL scheme is not supported even though your URL is a
		111	valid http URL because it redirected to an ftp URL, in which case you can
		112	look at the URL pseudo header).
102		113
		114	The pseudo-header C<Redirect> only exists when the request was a result
		115	of an internal redirect. In that case it is an array reference with
		116	the C<($data, $headers)> from the redirect response. Note that this
		117	response could in turn be the result of a redirect itself, and C<<
		118	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		119	response, and so on.
		120
103	If the server sends a header multiple lines, then their contents will be	121	If the server sends a header multiple times, then their contents will be
104	joined together with C<\x00>.	122	joined together with a comma (C<,>), as per the HTTP spec.
105		123
106	If an internal error occurs, such as not being able to resolve a hostname,	124	If an internal error occurs, such as not being able to resolve a hostname,
107	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	125	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
108	and the C<Reason> pseudo-header will contain an error message.	126	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		127	message.
109		128
110	A typical callback might look like this:	129	A typical callback might look like this:
111		130
112	sub {	131	sub {
113	my ($body, $hdr) = @_;	132	my ($body, $hdr) = @_;
…		…
131		150
132	=item headers => hashref	151	=item headers => hashref
133		152
134	The request headers to use. Currently, C<http_request> may provide its	153	The request headers to use. Currently, C<http_request> may provide its
135	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers	154	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
136	and will provide defaults for C<User-Agent:> and C<Referer:>.	155	and will provide defaults for C<User-Agent:> and C<Referer:> (this can be
		156	suppressed by using C<undef> for these headers in which case they won't be
		157	sent at all).
137		158
138	=item timeout => $seconds	159	=item timeout => $seconds
139		160
140	The time-out to use for various stages - each connect attempt will reset	161	The time-out to use for various stages - each connect attempt will reset
141	the timeout, as will read or write activity. Default timeout is 5 minutes.	162	the timeout, as will read or write activity, i.e. this is not an overall
		163	timeout.
		164
		165	Default timeout is 5 minutes.
142		166
143	=item proxy => [$host, $port[, $scheme]] or undef	167	=item proxy => [$host, $port[, $scheme]] or undef
144		168
145	Use the given http proxy for all requests. If not specified, then the	169	Use the given http proxy for all requests. If not specified, then the
146	default proxy (as specified by C<$ENV{http_proxy}>) is used.	170	default proxy (as specified by C<$ENV{http_proxy}>) is used.
147		171
148	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	172	C<$scheme> must be either missing, C<http> for HTTP or C<https> for
149	HTTPS.	173	HTTPS.
150		174
151	=item body => $string	175	=item body => $string
152		176
153	The request body, usually empty. Will be-sent as-is (future versions of	177	The request body, usually empty. Will be-sent as-is (future versions of
…		…
159	based on the original netscape specification.	183	based on the original netscape specification.
160		184
161	The C<$hash_ref> must be an (initially empty) hash reference which will	185	The C<$hash_ref> must be an (initially empty) hash reference which will
162	get updated automatically. It is possible to save the cookie_jar to	186	get updated automatically. It is possible to save the cookie_jar to
163	persistent storage with something like JSON or Storable, but this is not	187	persistent storage with something like JSON or Storable, but this is not
164	recommended, as expire times are currently being ignored.	188	recommended, as expiry times are currently being ignored.
165		189
166	Note that this cookie implementation is not of very high quality, nor	190	Note that this cookie implementation is not of very high quality, nor
167	meant to be complete. If you want complete cookie management you have to	191	meant to be complete. If you want complete cookie management you have to
168	do that on your own. C<cookie_jar> is meant as a quick fix to get some	192	do that on your own. C<cookie_jar> is meant as a quick fix to get some
169	cookie-using sites working. Cookies are a privacy disaster, do not use	193	cookie-using sites working. Cookies are a privacy disaster, do not use
170	them unless required to.	194	them unless required to.
		195
		196	=item tls_ctx => $scheme \| $tls_ctx
		197
		198	Specifies the AnyEvent::TLS context to be used for https connections. This
		199	parameter follows the same rules as the C<tls_ctx> parameter to
		200	L<AnyEvent::Handle>, but additionally, the two strings C<low> or
		201	C<high> can be specified, which give you a predefined low-security (no
		202	verification, highest compatibility) and high-security (CA and common-name
		203	verification) TLS context.
		204
		205	The default for this option is C<low>, which could be interpreted as "give
		206	me the page, no matter what".
		207
		208	=item on_prepare => $callback->($fh)
		209
		210	In rare cases you need to "tune" the socket before it is used to
		211	connect (for exmaple, to bind it on a given IP address). This parameter
		212	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		213	and behaves exactly the same way (e.g. it has to provide a
		214	timeout). See the description for the C<$prepare_cb> argument of
		215	C<AnyEvent::Socket::tcp_connect> for details.
		216
		217	=item on_header => $callback->($headers)
		218
		219	When specified, this callback will be called with the header hash as soon
		220	as headers have been successfully received from the remote server (not on
		221	locally-generated errors).
		222
		223	It has to return either true (in which case AnyEvent::HTTP will continue),
		224	or false, in which case AnyEvent::HTTP will cancel the download (and call
		225	the finish callback with an error code of C<598>).
		226
		227	This callback is useful, among other things, to quickly reject unwanted
		228	content, which, if it is supposed to be rare, can be faster than first
		229	doing a C<HEAD> request.
		230
		231	Example: cancel the request unless the content-type is "text/html".
		232
		233	on_header => sub {
		234	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
		235	},
		236
		237	=item on_body => $callback->($partial_body, $headers)
		238
		239	When specified, all body data will be passed to this callback instead of
		240	to the completion callback. The completion callback will get the empty
		241	string instead of the body data.
		242
		243	It has to return either true (in which case AnyEvent::HTTP will continue),
		244	or false, in which case AnyEvent::HTTP will cancel the download (and call
		245	the completion callback with an error code of C<598>).
		246
		247	This callback is useful when the data is too large to be held in memory
		248	(so the callback writes it to a file) or when only some information should
		249	be extracted, or when the body should be processed incrementally.
		250
		251	It is usually preferred over doing your own body handling via
		252	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		253	only used to create a connection, C<want_body_handle> is the better
		254	alternative, as it allows you to install your own event handler, reducing
		255	resource usage.
		256
		257	=item want_body_handle => $enable
		258
		259	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
		260	changes considerably: after parsing the headers, and instead of
		261	downloading the body (if any), the completion callback will be
		262	called. Instead of the C<$body> argument containing the body data, the
		263	callback will receive the L<AnyEvent::Handle> object associated with the
		264	connection. In error cases, C<undef> will be passed. When there is no body
		265	(e.g. status C<304>), the empty string will be passed.
		266
		267	The handle object might or might not be in TLS mode, might be connected to
		268	a proxy, be a persistent connection etc., and configured in unspecified
		269	ways. The user is responsible for this handle (it will not be used by this
		270	module anymore).
		271
		272	This is useful with some push-type services, where, after the initial
		273	headers, an interactive protocol is used (typical example would be the
		274	push-style twitter API which starts a JSON/XML stream).
		275
		276	If you think you need this, first have a look at C<on_body>, to see if
		277	that doesn't solve your problem in a better way.
171		278
172	=back	279	=back
173		280
174	Example: make a simple HTTP GET request for http://www.nethype.de/	281	Example: make a simple HTTP GET request for http://www.nethype.de/
175		282
…		…
188	my ($body, $hdr) = @_;	295	my ($body, $hdr) = @_;
189	use Data::Dumper;	296	use Data::Dumper;
190	print Dumper $hdr;	297	print Dumper $hdr;
191	}	298	}
192	;	299	;
		300
		301	Example: make another simple HTTP GET request, but immediately try to
		302	cancel it.
		303
		304	my $request = http_request GET => "http://www.nethype.de/", sub {
		305	my ($body, $hdr) = @_;
		306	print "$body\n";
		307	};
		308
		309	undef $request;
193		310
194	=cut	311	=cut
195		312
196	sub _slot_schedule;	313	sub _slot_schedule;
197	sub _slot_schedule($) {	314	sub _slot_schedule($) {
…		…
221	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	338	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
222		339
223	_slot_schedule $_[0];	340	_slot_schedule $_[0];
224	}	341	}
225		342
		343	our $qr_nl = qr{\015?\012};
		344	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		345
		346	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		347	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		348
226	sub http_request($$@) {	349	sub http_request($$@) {
227	my $cb = pop;	350	my $cb = pop;
228	my ($method, $url, %arg) = @_;	351	my ($method, $url, %arg) = @_;
229		352
230	my %hdr;	353	my %hdr;
		354
		355	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		356	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
231		357
232	$method = uc $method;	358	$method = uc $method;
233		359
234	if (my $hdr = $arg{headers}) {	360	if (my $hdr = $arg{headers}) {
235	while (my ($k, $v) = each %$hdr) {	361	while (my ($k, $v) = each %$hdr) {
236	$hdr{lc $k} = $v;	362	$hdr{lc $k} = $v;
237	}	363	}
238	}	364	}
239		365
		366	# pseudo headers for all subsequent responses
		367	my @pseudo = (URL => $url);
		368	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		369
240	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	370	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
241		371
242	return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url })	372	return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })
243	if $recurse < 0;	373	if $recurse < 0;
244		374
245	my $proxy = $arg{proxy} \|\| $PROXY;	375	my $proxy = $arg{proxy} \|\| $PROXY;
246	my $timeout = $arg{timeout} \|\| $TIMEOUT;	376	my $timeout = $arg{timeout} \|\| $TIMEOUT;
247		377
248	$hdr{"user-agent"} \|\|= $USERAGENT;
249
250	my ($scheme, $authority, $upath, $query, $fragment) =	378	my ($uscheme, $uauthority, $upath, $query, $fragment) =
251	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	379	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
252		380
253	$scheme = lc $scheme;	381	$uscheme = lc $uscheme;
254		382
255	my $uport = $scheme eq "http" ? 80	383	my $uport = $uscheme eq "http" ? 80
256	: $scheme eq "https" ? 443	384	: $uscheme eq "https" ? 443
257	: return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url });	385	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", @pseudo });
258		386
259	$hdr{referer} \|\|= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic
260
261	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	387	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
262	or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url });	388	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });
263		389
264	my $uhost = $1;	390	my $uhost = $1;
265	$uport = $2 if defined $2;	391	$uport = $2 if defined $2;
266		392
		393	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		394	unless exists $hdr{host};
		395
267	$uhost =~ s/^\[(.*)\]$/$1/;	396	$uhost =~ s/^\[(.*)\]$/$1/;
268	$upath .= "?$query" if length $query;	397	$upath .= $query if length $query;
269		398
270	$upath =~ s%^/?%/%;	399	$upath =~ s%^/?%/%;
271		400
272	# cookie processing	401	# cookie processing
273	if (my $jar = $arg{cookie_jar}) {	402	if (my $jar = $arg{cookie_jar}) {
274	%$jar = () if $jar->{version} < 1;	403	%$jar = () if $jar->{version} != 1;
275		404
276	my @cookie;	405	my @cookie;
277		406
278	while (my ($chost, $v) = each %$jar) {	407	while (my ($chost, $v) = each %$jar) {
		408	if ($chost =~ /^\./) {
279	next unless $chost eq substr $uhost, -length $chost;	409	next unless $chost eq substr $uhost, -length $chost;
280	next unless $chost =~ /^\./;	410	} elsif ($chost =~ /\./) {
		411	next unless $chost eq $uhost;
		412	} else {
		413	next;
		414	}
281		415
282	while (my ($cpath, $v) = each %$v) {	416	while (my ($cpath, $v) = each %$v) {
283	next unless $cpath eq substr $upath, 0, length $cpath;	417	next unless $cpath eq substr $upath, 0, length $cpath;
284		418
285	while (my ($k, $v) = each %$v) {	419	while (my ($k, $v) = each %$v) {
286	next if $scheme ne "https" && exists $v->{secure};	420	next if $uscheme ne "https" && exists $v->{secure};
		421	my $value = $v->{value};
		422	$value =~ s/([\\"])/\\$1/g;
287	push @cookie, "$k=$v->{value}";	423	push @cookie, "$k=\"$value\"";
288	}	424	}
289	}	425	}
290	}	426	}
291		427
292	$hdr{cookie} = join "; ", @cookie	428	$hdr{cookie} = join "; ", @cookie
293	if @cookie;	429	if @cookie;
294	}	430	}
295		431
296	my ($rhost, $rport, $rpath); # request host, port, path	432	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
297		433
298	if ($proxy) {	434	if ($proxy) {
299	($rhost, $rport, $scheme) = @$proxy;	435	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
300	$rpath = $url;	436
		437	$rscheme = "http" unless defined $rscheme;
		438
		439	# don't support https requests over https-proxy transport,
		440	# can't be done with tls as spec'ed, unless you double-encrypt.
		441	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
301	} else {	442	} else {
302	($rhost, $rport, $rpath) = ($uhost, $uport, $upath);	443	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
303	$hdr{host} = $uhost;
304	}	444	}
305		445
		446	# leave out fragment and query string, just a heuristic
		447	$hdr{referer} \|\|= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		448	$hdr{"user-agent"} \|\|= $USERAGENT unless exists $hdr{"user-agent"};
		449
306	$hdr{"content-length"} = length $arg{body};	450	$hdr{"content-length"} = length $arg{body}
		451	if length $arg{body} \|\| $method ne "GET";
307		452
308	my %state = (connect_guard => 1);	453	my %state = (connect_guard => 1);
309		454
310	_get_slot $uhost, sub {	455	_get_slot $uhost, sub {
311	$state{slot_guard} = shift;	456	$state{slot_guard} = shift;
312		457
313	return unless $state{connect_guard};	458	return unless $state{connect_guard};
314		459
315	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	460	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
316	$state{fh} = shift	461	$state{fh} = shift
		462	or do {
		463	my $err = "$!";
		464	%state = ();
317	or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url });	465	return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
		466	};
318		467
319	delete $state{connect_guard}; # reduce memory usage, save a tree	468	pop; # free memory, save a tree
		469
		470	return unless delete $state{connect_guard};
320		471
321	# get handle	472	# get handle
322	$state{handle} = new AnyEvent::Handle	473	$state{handle} = new AnyEvent::Handle
323	fh => $state{fh},	474	fh => $state{fh},
324	($scheme eq "https" ? (tls => "connect") : ());	475	peername => $rhost,
		476	tls_ctx => $arg{tls_ctx},
		477	# these need to be reconfigured on keepalive handles
		478	timeout => $timeout,
		479	on_error => sub {
		480	%state = ();
		481	$cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
		482	},
		483	on_eof => sub {
		484	%state = ();
		485	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
		486	},
		487	;
325		488
326	# limit the number of persistent connections	489	# limit the number of persistent connections
		490	# keepalive not yet supported
327	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	491	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
328	++$KA_COUNT{$_[1]};	492	# ++$KA_COUNT{$_[1]};
329	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	493	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		494	# --$KA_COUNT{$_[1]}
		495	# };
330	$hdr{connection} = "keep-alive";	496	# $hdr{connection} = "keep-alive";
331	delete $hdr{connection}; # keep-alive not yet supported
332	} else {	497	# } else {
333	delete $hdr{connection};	498	delete $hdr{connection};
334	}	499	# }
335		500
336	# (re-)configure handle	501	$state{handle}->starttls ("connect") if $rscheme eq "https";
337	$state{handle}->timeout ($timeout);
338	$state{handle}->on_error (sub {
339	my $errno = "$!";
340	%state = ();
341	$cb->(undef, { Status => 599, Reason => $errno, URL => $url });
342	});
343	$state{handle}->on_eof (sub {
344	%state = ();
345	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url });
346	});
347		502
		503	# handle actual, non-tunneled, request
		504	my $handle_actual_request = sub {
		505	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		506
348	# send request	507	# send request
349	$state{handle}->push_write (	508	$state{handle}->push_write (
350	"$method $rpath HTTP/1.0\015\012"	509	"$method $rpath HTTP/1.0\015\012"
351	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)	510	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
352	. "\015\012"	511	. "\015\012"
353	. (delete $arg{body})	512	. (delete $arg{body})
354	);
355
356	%hdr = (); # reduce memory usage, save a kitten
357
358	# status line
359	$state{handle}->push_read (line => qr/\015?\012/, sub {
360	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
361	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
362
363	my %hdr = ( # response headers
364	HTTPVersion => "\x00$1",
365	Status => "\x00$2",
366	Reason => "\x00$3",
367	URL => "\x00$url"
368	);	513	);
369		514
		515	# return if error occured during push_write()
		516	return unless %state;
		517
		518	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
		519
		520	# status line
		521	$state{handle}->push_read (line => $qr_nl, sub {
		522	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		523	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", @pseudo }));
		524
		525	push @pseudo,
		526	HTTPVersion => $1,
		527	Status => $2,
		528	Reason => $3,
		529	;
		530
370	# headers, could be optimized a bit	531	# headers, could be optimized a bit
371	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {	532	$state{handle}->unshift_read (line => $qr_nlnl, sub {
372	for ("$_[1]\012") {	533	for ("$_[1]") {
373	# we support spaces in field names, as lotus domino	534	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
374	# creates them.	535
		536	# things seen, not parsed:
		537	# p3pP="NON CUR OTPi OUR NOR UNI"
		538
375	$hdr{lc $1} .= "\x00$2"	539	$hdr{lc $1} .= ",$2"
376	while /\G	540	while /\G
377	([^:\000-\037]+):	541	([^:\000-\037]*):
378	[\011\040]*	542	[\011\040]*
379	((?: [^\015\012]+ \| \015?\012[\011\040] )*)	543	((?: [^\012]+ \| \012[\011\040] )*)
380	\015?\012	544	\012
381	/gxc;	545	/gxc;
382		546
383	/\G$/	547	/\G$/
384	or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url }));	548	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", @pseudo }));
385	}
386
387	substr $_, 0, 1, ""
388	for values %hdr;
389
390	my $finish = sub {
391	%state = ();
392
393	# set-cookie processing
394	if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
395	for (split /\x00/, $hdr{"set-cookie"}) {
396	my ($cookie, @arg) = split /;\s*/;
397	my ($name, $value) = split /=/, $cookie, 2;
398	my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
399
400	my $cdom = (delete $kv{domain}) \|\| $uhost;
401	my $cpath = (delete $kv{path}) \|\| "/";
402
403	$cdom =~ s/^.?/./; # make sure it starts with a "."
404
405	next if $cdom =~ /\.$/;
406
407	# this is not rfc-like and not netscape-like. go figure.
408	my $ndots = $cdom =~ y/.//;
409	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
410
411	# store it
412	$arg{cookie_jar}{version} = 1;
413	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
414	}
415	}	549	}
416		550
		551	# remove the "," prefix we added to all headers above
		552	substr $_, 0, 1, ""
		553	for values %hdr;
		554
		555	# patch in all pseudo headers
		556	%hdr = (%hdr, @pseudo);
		557
		558	# redirect handling
417	# microsoft and other shitheads don't give a shit for following standards,	559	# microsoft and other shitheads don't give a shit for following standards,
418	# try to support some common forms of broken Location headers.	560	# try to support some common forms of broken Location headers.
419	if ($_[1]{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {	561	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
420	$_[1]{location} =~ s/^\.\/+//;	562	$hdr{location} =~ s/^\.\/+//;
421		563
422	my $url = "$scheme://$uhost:$uport";	564	my $url = "$rscheme://$uhost:$uport";
423		565
424	unless ($_[1]{location} =~ s/^\///) {	566	unless ($hdr{location} =~ s/^\///) {
425	$url .= $upath;	567	$url .= $upath;
426	$url =~ s/\/[^\/]*$//;	568	$url =~ s/\/[^\/]*$//;
427	}	569	}
428		570
429	$_[1]{location} = "$url/$_[1]{location}";	571	$hdr{location} = "$url/$hdr{location}";
430	}	572	}
431		573
432	if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {	574	my $redirect;
		575
		576	if ($recurse) {
		577	my $status = $hdr{Status};
		578
		579	if (($status == 301 \|\| $status == 302) && $method ne "POST") {
433	# apparently, mozilla et al. just change POST to GET here	580	# apparently, mozilla et al. just change POST to GET here
434	# more research is needed before we do the same	581	# more research is needed before we do the same
435	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);	582	$redirect = 1;
436	} elsif ($_[1]{Status} == 303 && $recurse) {	583	} elsif ($status == 303) {
437	# even http/1.1 is unlear on how to mutate the method	584	# even http/1.1 is unclear on how to mutate the method
438	$method = "GET" unless $method eq "HEAD";	585	$method = "GET" unless $method eq "HEAD";
439	http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);	586	$redirect = 1;
440	} elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET\|HEAD)$/) {	587	} elsif ($status == 307 && $method =~ /^(?:GET\|HEAD)$/) {
441	http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);	588	$redirect = 1;
		589	}
		590	}
		591
		592	my $finish = sub {
		593	$state{handle}->destroy if $state{handle};
		594	%state = ();
		595
		596	# set-cookie processing
		597	if ($arg{cookie_jar}) {
		598	for ($_[1]{"set-cookie"}) {
		599	# parse NAME=VALUE
		600	my @kv;
		601
		602	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
		603	my $name = $1;
		604	my $value = $3;
		605
		606	unless ($value) {
		607	$value = $2;
		608	$value =~ s/\\(.)/$1/gs;
		609	}
		610
		611	push @kv, $name => $value;
		612
		613	last unless /\G\s*;/gc;
		614	}
		615
		616	last unless @kv;
		617
		618	my $name = shift @kv;
		619	my %kv = (value => shift @kv, @kv);
		620
		621	my $cdom;
		622	my $cpath = (delete $kv{path}) \|\| "/";
		623
		624	if (exists $kv{domain}) {
		625	$cdom = delete $kv{domain};
		626
		627	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		628
		629	next if $cdom =~ /\.$/;
		630
		631	# this is not rfc-like and not netscape-like. go figure.
		632	my $ndots = $cdom =~ y/.//;
		633	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		634	} else {
		635	$cdom = $uhost;
		636	}
		637
		638	# store it
		639	$arg{cookie_jar}{version} = 1;
		640	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		641
		642	redo if /\G\s*,/gc;
		643	}
		644	}
		645
		646	if ($redirect && exists $hdr{location}) {
		647	# we ignore any errors, as it is very common to receive
		648	# Content-Length != 0 but no actual body
		649	# we also access %hdr, as $_[1] might be an erro
		650	http_request (
		651	$method => $hdr{location},
		652	%arg,
		653	recurse => $recurse - 1,
		654	Redirect => \@_,
		655	$cb);
		656	} else {
		657	$cb->($_[0], $_[1]);
		658	}
		659	};
		660
		661	my $len = $hdr{"content-length"};
		662
		663	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		664	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
		665	} elsif (
		666	$hdr{Status} =~ /^(?:1..\|[23]04)$/
		667	or $method eq "HEAD"
		668	or (defined $len && !$len)
		669	) {
		670	# no body
		671	$finish->("", \%hdr);
442	} else {	672	} else {
443	$cb->($_[0], $_[1]);	673	# body handling, four different code paths
		674	# for want_body_handle, on_body (2x), normal (2x)
		675	# we might read too much here, but it does not matter yet (no pers. connections)
		676	if (!$redirect && $arg{want_body_handle}) {
		677	$_[0]->on_eof (undef);
		678	$_[0]->on_error (undef);
		679	$_[0]->on_read (undef);
		680
		681	$finish->(delete $state{handle}, \%hdr);
		682
		683	} elsif ($arg{on_body}) {
		684	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
		685	if ($len) {
		686	$_[0]->on_eof (undef);
		687	$_[0]->on_read (sub {
		688	$len -= length $_[0]{rbuf};
		689
		690	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		691	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
		692
		693	$len > 0
		694	or $finish->("", \%hdr);
		695	});
		696	} else {
		697	$_[0]->on_eof (sub {
		698	$finish->("", \%hdr);
		699	});
		700	$_[0]->on_read (sub {
		701	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		702	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
		703	});
		704	}
		705	} else {
		706	$_[0]->on_eof (undef);
		707
		708	if ($len) {
		709	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
		710	$_[0]->on_read (sub {
		711	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
		712	if $len <= length $_[0]{rbuf};
		713	});
		714	} else {
		715	$_[0]->on_error (sub {
		716	$! == Errno::EPIPE \|\| !$!
		717	? $finish->(delete $_[0]{rbuf}, \%hdr)
		718	: $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
		719	});
		720	$_[0]->on_read (sub { });
		721	}
		722	}
444	}	723	}
445	};	724	});
		725	});
		726	};
446		727
447	if ($hdr{Status} =~ /^(?:1..\|204\|304)$/ or $method eq "HEAD") {	728	# now handle proxy-CONNECT method
448	$finish->(undef, \%hdr);	729	if ($proxy && $uscheme eq "https") {
		730	# oh dear, we have to wrap it into a connect request
		731
		732	# maybe re-use $uauthority with patched port?
		733	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		734	$state{handle}->push_read (line => $qr_nlnl, sub {
		735	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		736	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", @pseudo }));
		737
		738	if ($2 == 200) {
		739	$rpath = $upath;
		740	&$handle_actual_request;
449	} else {	741	} else {
450	if (exists $hdr{"content-length"}) {	742	%state = ();
451	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	743	$cb->(undef, { Status => $2, Reason => $3, @pseudo });
452	# could cache persistent connection now
453	if ($hdr{connection} =~ /\bkeep-alive\b/i) {
454	# but we don't, due to misdesigns, this is annoyingly complex
455	};
456
457	$finish->($_[1], \%hdr);
458	});
459	} else {
460	# too bad, need to read until we get an error or EOF,
461	# no way to detect winged data.
462	$_[0]->on_error (sub {
463	$finish->($_[0]{rbuf}, \%hdr);
464	});
465	$_[0]->on_eof (undef);
466	$_[0]->on_read (sub { });
467	}
468	}	744	}
469	});	745	});
		746	} else {
		747	&$handle_actual_request;
470	});	748	}
471	}, sub {	749
472	$timeout	750	}, $arg{on_prepare} \|\| sub { $timeout };
473	};
474	};	751	};
475		752
476	defined wantarray && AnyEvent::Util::guard { %state = () }	753	defined wantarray && AnyEvent::Util::guard { %state = () }
477	}	754	}
478		755
…		…
492	&http_request	769	&http_request
493	}	770	}
494		771
495	=back	772	=back
496		773
		774	=head2 DNS CACHING
		775
		776	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		777	the actual connection, which in turn uses AnyEvent::DNS to resolve
		778	hostnames. The latter is a simple stub resolver and does no caching
		779	on its own. If you want DNS caching, you currently have to provide
		780	your own default resolver (by storing a suitable resolver object in
		781	C<$AnyEvent::DNS::RESOLVER>).
		782
497	=head2 GLOBAL FUNCTIONS AND VARIABLES	783	=head2 GLOBAL FUNCTIONS AND VARIABLES
498		784
499	=over 4	785	=over 4
500		786
501	=item AnyEvent::HTTP::set_proxy "proxy-url"	787	=item AnyEvent::HTTP::set_proxy "proxy-url"
502		788
503	Sets the default proxy server to use. The proxy-url must begin with a	789	Sets the default proxy server to use. The proxy-url must begin with a
504	string of the form C<http://host:port> (optionally C<https:...>).	790	string of the form C<http://host:port> (optionally C<https:...>), croaks
		791	otherwise.
		792
		793	To clear an already-set proxy, use C<undef>.
505		794
506	=item $AnyEvent::HTTP::MAX_RECURSE	795	=item $AnyEvent::HTTP::MAX_RECURSE
507		796
508	The default value for the C<recurse> request parameter (default: C<10>).	797	The default value for the C<recurse> request parameter (default: C<10>).
509		798
510	=item $AnyEvent::HTTP::USERAGENT	799	=item $AnyEvent::HTTP::USERAGENT
511		800
512	The default value for the C<User-Agent> header (the default is	801	The default value for the C<User-Agent> header (the default is
513	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	802	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
514		803
515	=item $AnyEvent::HTTP::MAX_PERSISTENT	804	=item $AnyEvent::HTTP::MAX_PER_HOST
516		805
517	The maximum number of persistent connections to keep open (default: 8).	806	The maximum number of concurrent connections to the same host (identified
		807	by the hostname). If the limit is exceeded, then the additional requests
		808	are queued until previous connections are closed.
518		809
519	Not implemented currently.	810	The default value for this is C<4>, and it is highly advisable to not
520		811	increase it.
521	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
522
523	The maximum time to cache a persistent connection, in seconds (default: 2).
524
525	Not implemented currently.
526		812
527	=item $AnyEvent::HTTP::ACTIVE	813	=item $AnyEvent::HTTP::ACTIVE
528		814
529	The number of active connections. This is not the number of currently	815	The number of active connections. This is not the number of currently
530	running requests, but the number of currently open and non-idle TCP	816	running requests, but the number of currently open and non-idle TCP
…		…
533	=back	819	=back
534		820
535	=cut	821	=cut
536		822
537	sub set_proxy($) {	823	sub set_proxy($) {
		824	if (length $_[0]) {
538	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	825	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		826	or Carp::croak "$_[0]: invalid proxy URL";
		827	$PROXY = [$2, $3 \|\| 3128, $1]
		828	} else {
		829	undef $PROXY;
		830	}
539	}	831	}
540		832
541	# initialise proxy from environment	833	# initialise proxy from environment
		834	eval {
542	set_proxy $ENV{http_proxy};	835	set_proxy $ENV{http_proxy};
		836	};
543		837
544	=head1 SEE ALSO	838	=head1 SEE ALSO
545		839
546	L<AnyEvent>.	840	L<AnyEvent>.
547		841
548	=head1 AUTHOR	842	=head1 AUTHOR
549		843
550	Marc Lehmann <schmorp@schmorp.de>	844	Marc Lehmann <schmorp@schmorp.de>
551	http://home.schmorp.de/	845	http://home.schmorp.de/
552		846
		847	With many thanks to Дмитрий Шалашов, who provided countless
		848	testcases and bugreports.
		849
553	=cut	850	=cut
554		851
555	1	852	1
556		853

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.27 by root, Thu Jul 24 06:01:10 2008 UTC vs. Revision 1.56 by root, Mon Sep 6 05:30:54 2010 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.27 by root, Thu Jul 24 06:01:10 2008 UTC vs.
Revision 1.56 by root, Mon Sep 6 05:30:54 2010 UTC