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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.29 by root, Wed Oct 22 23:28:11 2008 UTC vs.
Revision 1.58 by root, Sun Nov 14 20:23:00 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 = '1.05';	53	our $VERSION = '1.46';
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
…		…
92	must be an absolute http or https URL.	92	must be an absolute http or https URL.
93		93
94	When called in void context, nothing is returned. In other contexts,	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	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	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.	97	destroyed before the callback is called, the request will be cancelled.
98		98
99	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
100	(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
101	response headers as second argument.	101	second argument.
102		102
103	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
104	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
105	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
106	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
107	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).
108		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	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		119	response, and so on.
		120
109	If the server sends a header multiple lines, then their contents will be	121	If the server sends a header multiple times, then their contents will be
110	joined together with C<\x00>.	122	joined together with a comma (C<,>), as per the HTTP spec.
111		123
112	If an internal error occurs, such as not being able to resolve a hostname,	124	If an internal error occurs, such as not being able to resolve a hostname,
113	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>	125	then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
114	and the C<Reason> pseudo-header will contain an error message.	126	(usually C<599>) and the C<Reason> pseudo-header will contain an error
		127	message.
115		128
116	A typical callback might look like this:	129	A typical callback might look like this:
117		130
118	sub {	131	sub {
119	my ($body, $hdr) = @_;	132	my ($body, $hdr) = @_;
…		…
137		150
138	=item headers => hashref	151	=item headers => hashref
139		152
140	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
141	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
142	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).
143		158
144	=item timeout => $seconds	159	=item timeout => $seconds
145		160
146	The time-out to use for various stages - each connect attempt will reset	161	The time-out to use for various stages - each connect attempt will reset
147	the timeout, as will read or write activity. Default timeout is 5 minutes.	162	the timeout, as will read or write activity, i.e. this is not an overall
		163	timeout.
		164
		165	Default timeout is 5 minutes.
148		166
149	=item proxy => [$host, $port[, $scheme]] or undef	167	=item proxy => [$host, $port[, $scheme]] or undef
150		168
151	Use the given http proxy for all requests. If not specified, then the	169	Use the given http proxy for all requests. If not specified, then the
152	default proxy (as specified by C<$ENV{http_proxy}>) is used.	170	default proxy (as specified by C<$ENV{http_proxy}>) is used.
153		171
154	C<$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
155	HTTPS.	173	HTTPS.
156		174
157	=item body => $string	175	=item body => $string
158		176
159	The request body, usually empty. Will be-sent as-is (future versions of	177	The request body, usually empty. Will be-sent as-is (future versions of
…		…
165	based on the original netscape specification.	183	based on the original netscape specification.
166		184
167	The C<$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
168	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
169	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
170	recommended, as expire times are currently being ignored.	188	recommended, as expiry times are currently being ignored.
171		189
172	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
173	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
174	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
175	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
176	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.
177		278
178	=back	279	=back
179		280
180	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/
181		282
…		…
237	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	338	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
238		339
239	_slot_schedule $_[0];	340	_slot_schedule $_[0];
240	}	341	}
241		342
		343	our $qr_nlnl = qr{(?<![^\012])\015?\012};
		344
		345	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
		346	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
		347
242	sub http_request($$@) {	348	sub http_request($$@) {
243	my $cb = pop;	349	my $cb = pop;
244	my ($method, $url, %arg) = @_;	350	my ($method, $url, %arg) = @_;
245		351
246	my %hdr;	352	my %hdr;
		353
		354	$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" \|\| !exists $arg{tls_ctx};
		355	$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
247		356
248	$method = uc $method;	357	$method = uc $method;
249		358
250	if (my $hdr = $arg{headers}) {	359	if (my $hdr = $arg{headers}) {
251	while (my ($k, $v) = each %$hdr) {	360	while (my ($k, $v) = each %$hdr) {
252	$hdr{lc $k} = $v;	361	$hdr{lc $k} = $v;
253	}	362	}
254	}	363	}
255		364
		365	# pseudo headers for all subsequent responses
		366	my @pseudo = (URL => $url);
		367	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		368
256	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	369	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
257		370
258	return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url })	371	return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })
259	if $recurse < 0;	372	if $recurse < 0;
260		373
261	my $proxy = $arg{proxy} \|\| $PROXY;	374	my $proxy = $arg{proxy} \|\| $PROXY;
262	my $timeout = $arg{timeout} \|\| $TIMEOUT;	375	my $timeout = $arg{timeout} \|\| $TIMEOUT;
263		376
264	$hdr{"user-agent"} \|\|= $USERAGENT;
265
266	my ($scheme, $authority, $upath, $query, $fragment) =	377	my ($uscheme, $uauthority, $upath, $query, $fragment) =
267	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	378	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
268		379
269	$scheme = lc $scheme;	380	$uscheme = lc $uscheme;
270		381
271	my $uport = $scheme eq "http" ? 80	382	my $uport = $uscheme eq "http" ? 80
272	: $scheme eq "https" ? 443	383	: $uscheme eq "https" ? 443
273	: return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url });	384	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", @pseudo });
274		385
275	$hdr{referer} \|\|= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic
276
277	$authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	386	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
278	or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url });	387	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });
279		388
280	my $uhost = $1;	389	my $uhost = $1;
281	$uport = $2 if defined $2;	390	$uport = $2 if defined $2;
282		391
		392	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		393	unless exists $hdr{host};
		394
283	$uhost =~ s/^\[(.*)\]$/$1/;	395	$uhost =~ s/^\[(.*)\]$/$1/;
284	$upath .= "?$query" if length $query;	396	$upath .= $query if length $query;
285		397
286	$upath =~ s%^/?%/%;	398	$upath =~ s%^/?%/%;
287		399
288	# cookie processing	400	# cookie processing
289	if (my $jar = $arg{cookie_jar}) {	401	if (my $jar = $arg{cookie_jar}) {
290	%$jar = () if $jar->{version} < 1;	402	%$jar = () if $jar->{version} != 1;
291		403
292	my @cookie;	404	my @cookie;
293		405
294	while (my ($chost, $v) = each %$jar) {	406	while (my ($chost, $v) = each %$jar) {
		407	if ($chost =~ /^\./) {
295	next unless $chost eq substr $uhost, -length $chost;	408	next unless $chost eq substr $uhost, -length $chost;
296	next unless $chost =~ /^\./;	409	} elsif ($chost =~ /\./) {
		410	next unless $chost eq $uhost;
		411	} else {
		412	next;
		413	}
297		414
298	while (my ($cpath, $v) = each %$v) {	415	while (my ($cpath, $v) = each %$v) {
299	next unless $cpath eq substr $upath, 0, length $cpath;	416	next unless $cpath eq substr $upath, 0, length $cpath;
300		417
301	while (my ($k, $v) = each %$v) {	418	while (my ($k, $v) = each %$v) {
302	next if $scheme ne "https" && exists $v->{secure};	419	next if $uscheme ne "https" && exists $v->{secure};
		420	my $value = $v->{value};
		421	$value =~ s/([\\"])/\\$1/g;
303	push @cookie, "$k=$v->{value}";	422	push @cookie, "$k=\"$value\"";
304	}	423	}
305	}	424	}
306	}	425	}
307		426
308	$hdr{cookie} = join "; ", @cookie	427	$hdr{cookie} = join "; ", @cookie
309	if @cookie;	428	if @cookie;
310	}	429	}
311		430
312	my ($rhost, $rport, $rpath); # request host, port, path	431	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
313		432
314	if ($proxy) {	433	if ($proxy) {
315	($rhost, $rport, $scheme) = @$proxy;	434	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
316	$rpath = $url;	435
		436	$rscheme = "http" unless defined $rscheme;
		437
		438	# don't support https requests over https-proxy transport,
		439	# can't be done with tls as spec'ed, unless you double-encrypt.
		440	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
317	} else {	441	} else {
318	($rhost, $rport, $rpath) = ($uhost, $uport, $upath);	442	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
319	$hdr{host} = $uhost;
320	}	443	}
321		444
		445	# leave out fragment and query string, just a heuristic
		446	$hdr{referer} \|\|= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		447	$hdr{"user-agent"} \|\|= $USERAGENT unless exists $hdr{"user-agent"};
		448
322	$hdr{"content-length"} = length $arg{body};	449	$hdr{"content-length"} = length $arg{body}
		450	if length $arg{body} \|\| $method ne "GET";
323		451
324	my %state = (connect_guard => 1);	452	my %state = (connect_guard => 1);
325		453
326	_get_slot $uhost, sub {	454	_get_slot $uhost, sub {
327	$state{slot_guard} = shift;	455	$state{slot_guard} = shift;
328		456
329	return unless $state{connect_guard};	457	return unless $state{connect_guard};
330		458
331	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	459	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
332	$state{fh} = shift	460	$state{fh} = shift
		461	or do {
		462	my $err = "$!";
		463	%state = ();
333	or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url });	464	return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
		465	};
334		466
335	delete $state{connect_guard}; # reduce memory usage, save a tree	467	pop; # free memory, save a tree
		468
		469	return unless delete $state{connect_guard};
336		470
337	# get handle	471	# get handle
338	$state{handle} = new AnyEvent::Handle	472	$state{handle} = new AnyEvent::Handle
339	fh => $state{fh},	473	fh => $state{fh},
340	($scheme eq "https" ? (tls => "connect") : ());	474	peername => $rhost,
		475	tls_ctx => $arg{tls_ctx},
		476	# these need to be reconfigured on keepalive handles
		477	timeout => $timeout,
		478	on_error => sub {
		479	%state = ();
		480	$cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
		481	},
		482	on_eof => sub {
		483	%state = ();
		484	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
		485	},
		486	;
341		487
342	# limit the number of persistent connections	488	# limit the number of persistent connections
		489	# keepalive not yet supported
343	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	490	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
344	++$KA_COUNT{$_[1]};	491	# ++$KA_COUNT{$_[1]};
345	$state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };	492	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
		493	# --$KA_COUNT{$_[1]}
		494	# };
346	$hdr{connection} = "keep-alive";	495	# $hdr{connection} = "keep-alive";
347	delete $hdr{connection}; # keep-alive not yet supported
348	} else {	496	# } else {
349	delete $hdr{connection};	497	delete $hdr{connection};
350	}	498	# }
351		499
352	# (re-)configure handle	500	$state{handle}->starttls ("connect") if $rscheme eq "https";
353	$state{handle}->timeout ($timeout);
354	$state{handle}->on_error (sub {
355	my $errno = "$!";
356	%state = ();
357	$cb->(undef, { Status => 599, Reason => $errno, URL => $url });
358	});
359	$state{handle}->on_eof (sub {
360	%state = ();
361	$cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url });
362	});
363		501
		502	# handle actual, non-tunneled, request
		503	my $handle_actual_request = sub {
		504	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
		505
364	# send request	506	# send request
365	$state{handle}->push_write (	507	$state{handle}->push_write (
366	"$method $rpath HTTP/1.0\015\012"	508	"$method $rpath HTTP/1.0\015\012"
367	. (join "", map "$_: $hdr{$_}\015\012", keys %hdr)	509	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
368	. "\015\012"	510	. "\015\012"
369	. (delete $arg{body})	511	. (delete $arg{body})
370	);
371
372	%hdr = (); # reduce memory usage, save a kitten
373
374	# status line
375	$state{handle}->push_read (line => qr/\015?\012/, sub {
376	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
377	or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
378
379	my %hdr = ( # response headers
380	HTTPVersion => "\x00$1",
381	Status => "\x00$2",
382	Reason => "\x00$3",
383	URL => "\x00$url"
384	);	512	);
385		513
386	# headers, could be optimized a bit	514	# return if error occured during push_write()
		515	return unless %state;
		516
		517	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
		518
		519	# status line and headers
387	$state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {	520	$state{handle}->push_read (line => $qr_nlnl, sub {
388	for ("$_[1]\012") {	521	for ("$_[1]") {
389	# we support spaces in field names, as lotus domino	522	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
390	# creates them.	523
		524	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc
		525	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response", @pseudo }));
		526
		527	push @pseudo,
		528	HTTPVersion => $1,
		529	Status => $2,
		530	Reason => $3,
		531	;
		532
		533	# things seen, not parsed:
		534	# p3pP="NON CUR OTPi OUR NOR UNI"
		535
391	$hdr{lc $1} .= "\x00$2"	536	$hdr{lc $1} .= ",$2"
392	while /\G	537	while /\G
393	([^:\000-\037]+):	538	([^:\000-\037]*):
394	[\011\040]*	539	[\011\040]*
395	((?: [^\015\012]+ \| \015?\012[\011\040] )*)	540	((?: [^\012]+ \| \012[\011\040] )*)
396	\015?\012	541	\012
397	/gxc;	542	/gxc;
398		543
399	/\G$/	544	/\G$/
400	or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url }));	545	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", @pseudo }));
401	}	546	}
402		547
		548	# remove the "," prefix we added to all headers above
403	substr $_, 0, 1, ""	549	substr $_, 0, 1, ""
404	for values %hdr;	550	for values %hdr;
405		551
		552	# patch in all pseudo headers
		553	%hdr = (%hdr, @pseudo);
		554
		555	# redirect handling
		556	# microsoft and other shitheads don't give a shit for following standards,
		557	# try to support some common forms of broken Location headers.
		558	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		559	$hdr{location} =~ s/^\.\/+//;
		560
		561	my $url = "$rscheme://$uhost:$uport";
		562
		563	unless ($hdr{location} =~ s/^\///) {
		564	$url .= $upath;
		565	$url =~ s/\/[^\/]*$//;
		566	}
		567
		568	$hdr{location} = "$url/$hdr{location}";
		569	}
		570
		571	my $redirect;
		572
		573	if ($recurse) {
		574	my $status = $hdr{Status};
		575
		576	# industry standard is to redirect POST as GET for
		577	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
		578	# also, the UA should ask the user for 301 and 307 and POST,
		579	# industry standard seems to be to simply follow.
		580	# we go with the industry standard.
		581	if ($status == 301 or $status == 302 or $status == 303) {
		582	# HTTP/1.1 is unclear on how to mutate the method
		583	$method = "GET" unless $method eq "HEAD";
		584	$redirect = 1;
		585	} elsif ($status == 307) {
		586	$redirect = 1;
		587	}
		588	}
		589
406	my $finish = sub {	590	my $finish = sub {
		591	$state{handle}->destroy if $state{handle};
407	%state = ();	592	%state = ();
408		593
409	# set-cookie processing	594	# set-cookie processing
410	if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {	595	if ($arg{cookie_jar}) {
411	for (split /\x00/, $hdr{"set-cookie"}) {	596	for ($_[1]{"set-cookie"}) {
412	my ($cookie, @arg) = split /;\s*/;	597	# parse NAME=VALUE
413	my ($name, $value) = split /=/, $cookie, 2;	598	my @kv;
414	my %kv = (value => $value, map { split /=/, $_, 2 } @arg);	599
		600	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
		601	my $name = $1;
		602	my $value = $3;
		603
		604	unless ($value) {
		605	$value = $2;
		606	$value =~ s/\\(.)/$1/gs;
		607	}
		608
		609	push @kv, $name => $value;
		610
		611	last unless /\G\s*;/gc;
		612	}
		613
		614	last unless @kv;
		615
		616	my $name = shift @kv;
		617	my %kv = (value => shift @kv, @kv);
		618
		619	my $cdom;
		620	my $cpath = (delete $kv{path}) \|\| "/";
		621
		622	if (exists $kv{domain}) {
		623	$cdom = delete $kv{domain};
415		624
416	my $cdom = (delete $kv{domain}) \|\| $uhost;
417	my $cpath = (delete $kv{path}) \|\| "/";
418
419	$cdom =~ s/^\.?/./; # make sure it starts with a "."	625	$cdom =~ s/^\.?/./; # make sure it starts with a "."
420		626
421	next if $cdom =~ /\.$/;	627	next if $cdom =~ /\.$/;
422		628
423	# this is not rfc-like and not netscape-like. go figure.	629	# this is not rfc-like and not netscape-like. go figure.
424	my $ndots = $cdom =~ y/.//;	630	my $ndots = $cdom =~ y/.//;
425	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);	631	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		632	} else {
		633	$cdom = $uhost;
		634	}
426		635
427	# store it	636	# store it
428	$arg{cookie_jar}{version} = 1;	637	$arg{cookie_jar}{version} = 1;
429	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;	638	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		639
		640	redo if /\G\s*,/gc;
430	}	641	}
431	}	642	}
432		643
433	# microsoft and other shitheads don't give a shit for following standards,	644	if ($redirect && exists $hdr{location}) {
434	# try to support some common forms of broken Location headers.	645	# we ignore any errors, as it is very common to receive
435	if ($_[1]{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {	646	# Content-Length != 0 but no actual body
436	$_[1]{location} =~ s/^\.\/+//;	647	# we also access %hdr, as $_[1] might be an erro
437		648	http_request (
438	my $url = "$scheme://$uhost:$uport";	649	$method => $hdr{location},
439
440	unless ($_[1]{location} =~ s/^\///) {
441	$url .= $upath;
442	$url =~ s/\/[^\/]*$//;
443	}	650	%arg,
444		651	recurse => $recurse - 1,
445	$_[1]{location} = "$url/$_[1]{location}";	652	Redirect => \@_,
446	}	653	$cb);
447
448	if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
449	# apparently, mozilla et al. just change POST to GET here
450	# more research is needed before we do the same
451	http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
452	} elsif ($_[1]{Status} == 303 && $recurse) {
453	# even http/1.1 is unlear on how to mutate the method
454	$method = "GET" unless $method eq "HEAD";
455	http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
456	} elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET\|HEAD)$/) {
457	http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
458	} else {	654	} else {
459	$cb->($_[0], $_[1]);	655	$cb->($_[0], $_[1]);
460	}	656	}
461	};	657	};
462		658
463	if ($hdr{Status} =~ /^(?:1..\|204\|304)$/ or $method eq "HEAD") {	659	my $len = $hdr{"content-length"};
		660
		661	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		662	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
		663	} elsif (
		664	$hdr{Status} =~ /^(?:1..\|[23]04)$/
		665	or $method eq "HEAD"
		666	or (defined $len && !$len)
		667	) {
		668	# no body
464	$finish->(undef, \%hdr);	669	$finish->("", \%hdr);
465	} else {	670	} else {
466	if (exists $hdr{"content-length"}) {	671	# body handling, four different code paths
467	$_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {	672	# for want_body_handle, on_body (2x), normal (2x)
468	# could cache persistent connection now	673	# we might read too much here, but it does not matter yet (no pers. connections)
469	if ($hdr{connection} =~ /\bkeep-alive\b/i) {	674	if (!$redirect && $arg{want_body_handle}) {
470	# but we don't, due to misdesigns, this is annoyingly complex	675	$_[0]->on_eof (undef);
		676	$_[0]->on_error (undef);
		677	$_[0]->on_read (undef);
		678
		679	$finish->(delete $state{handle}, \%hdr);
		680
		681	} elsif ($arg{on_body}) {
		682	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
		683	if ($len) {
		684	$_[0]->on_eof (undef);
		685	$_[0]->on_read (sub {
		686	$len -= length $_[0]{rbuf};
		687
		688	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		689	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
		690
		691	$len > 0
		692	or $finish->("", \%hdr);
471	};	693	});
472		694	} else {
		695	$_[0]->on_eof (sub {
473	$finish->($_[1], \%hdr);	696	$finish->("", \%hdr);
		697	});
		698	$_[0]->on_read (sub {
		699	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		700	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
		701	});
474	});	702	}
475	} else {	703	} else {
476	# too bad, need to read until we get an error or EOF,
477	# no way to detect winged data.
478	$_[0]->on_error (sub {
479	$finish->($_[0]{rbuf}, \%hdr);
480	});
481	$_[0]->on_eof (undef);	704	$_[0]->on_eof (undef);
		705
		706	if ($len) {
		707	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
		708	$_[0]->on_read (sub {
		709	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
		710	if $len <= length $_[0]{rbuf};
		711	});
		712	} else {
		713	$_[0]->on_error (sub {
		714	($! == Errno::EPIPE \|\| !$!)
		715	? $finish->(delete $_[0]{rbuf}, \%hdr)
		716	: $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
		717	});
482	$_[0]->on_read (sub { });	718	$_[0]->on_read (sub { });
		719	}
483	}	720	}
484	}	721	}
485	});	722	});
486	});	723	};
487	}, sub {	724
488	$timeout	725	# now handle proxy-CONNECT method
		726	if ($proxy && $uscheme eq "https") {
		727	# oh dear, we have to wrap it into a connect request
		728
		729	# maybe re-use $uauthority with patched port?
		730	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
		731	$state{handle}->push_read (line => $qr_nlnl, sub {
		732	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
		733	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", @pseudo }));
		734
		735	if ($2 == 200) {
		736	$rpath = $upath;
		737	&$handle_actual_request;
		738	} else {
		739	%state = ();
		740	$cb->(undef, { Status => $2, Reason => $3, @pseudo });
		741	}
		742	});
		743	} else {
		744	&$handle_actual_request;
489	};	745	}
		746
		747	}, $arg{on_prepare} \|\| sub { $timeout };
490	};	748	};
491		749
492	defined wantarray && AnyEvent::Util::guard { %state = () }	750	defined wantarray && AnyEvent::Util::guard { %state = () }
493	}	751	}
494		752
…		…
508	&http_request	766	&http_request
509	}	767	}
510		768
511	=back	769	=back
512		770
		771	=head2 DNS CACHING
		772
		773	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		774	the actual connection, which in turn uses AnyEvent::DNS to resolve
		775	hostnames. The latter is a simple stub resolver and does no caching
		776	on its own. If you want DNS caching, you currently have to provide
		777	your own default resolver (by storing a suitable resolver object in
		778	C<$AnyEvent::DNS::RESOLVER>).
		779
513	=head2 GLOBAL FUNCTIONS AND VARIABLES	780	=head2 GLOBAL FUNCTIONS AND VARIABLES
514		781
515	=over 4	782	=over 4
516		783
517	=item AnyEvent::HTTP::set_proxy "proxy-url"	784	=item AnyEvent::HTTP::set_proxy "proxy-url"
518		785
519	Sets the default proxy server to use. The proxy-url must begin with a	786	Sets the default proxy server to use. The proxy-url must begin with a
520	string of the form C<http://host:port> (optionally C<https:...>).	787	string of the form C<http://host:port> (optionally C<https:...>), croaks
		788	otherwise.
		789
		790	To clear an already-set proxy, use C<undef>.
521		791
522	=item $AnyEvent::HTTP::MAX_RECURSE	792	=item $AnyEvent::HTTP::MAX_RECURSE
523		793
524	The default value for the C<recurse> request parameter (default: C<10>).	794	The default value for the C<recurse> request parameter (default: C<10>).
525		795
526	=item $AnyEvent::HTTP::USERAGENT	796	=item $AnyEvent::HTTP::USERAGENT
527		797
528	The default value for the C<User-Agent> header (the default is	798	The default value for the C<User-Agent> header (the default is
529	C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	799	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
530		800
531	=item $AnyEvent::HTTP::MAX_PERSISTENT	801	=item $AnyEvent::HTTP::MAX_PER_HOST
532		802
533	The maximum number of persistent connections to keep open (default: 8).	803	The maximum number of concurrent connections to the same host (identified
		804	by the hostname). If the limit is exceeded, then the additional requests
		805	are queued until previous connections are closed.
534		806
535	Not implemented currently.	807	The default value for this is C<4>, and it is highly advisable to not
536		808	increase it.
537	=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
538
539	The maximum time to cache a persistent connection, in seconds (default: 2).
540
541	Not implemented currently.
542		809
543	=item $AnyEvent::HTTP::ACTIVE	810	=item $AnyEvent::HTTP::ACTIVE
544		811
545	The number of active connections. This is not the number of currently	812	The number of active connections. This is not the number of currently
546	running requests, but the number of currently open and non-idle TCP	813	running requests, but the number of currently open and non-idle TCP
…		…
549	=back	816	=back
550		817
551	=cut	818	=cut
552		819
553	sub set_proxy($) {	820	sub set_proxy($) {
		821	if (length $_[0]) {
554	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	822	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		823	or Carp::croak "$_[0]: invalid proxy URL";
		824	$PROXY = [$2, $3 \|\| 3128, $1]
		825	} else {
		826	undef $PROXY;
		827	}
555	}	828	}
556		829
557	# initialise proxy from environment	830	# initialise proxy from environment
		831	eval {
558	set_proxy $ENV{http_proxy};	832	set_proxy $ENV{http_proxy};
		833	};
559		834
560	=head1 SEE ALSO	835	=head1 SEE ALSO
561		836
562	L<AnyEvent>.	837	L<AnyEvent>.
563		838
564	=head1 AUTHOR	839	=head1 AUTHOR
565		840
566	Marc Lehmann <schmorp@schmorp.de>	841	Marc Lehmann <schmorp@schmorp.de>
567	http://home.schmorp.de/	842	http://home.schmorp.de/
568		843
		844	With many thanks to Дмитрий Шалашов, who provided countless
		845	testcases and bugreports.
		846
569	=cut	847	=cut
570		848
571	1	849	1
572		850

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.29 by root, Wed Oct 22 23:28:11 2008 UTC vs. Revision 1.58 by root, Sun Nov 14 20:23:00 2010 UTC

Diff Legend

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.29 by root, Wed Oct 22 23:28:11 2008 UTC vs.
Revision 1.58 by root, Sun Nov 14 20:23:00 2010 UTC