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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.53 by root, Sat Dec 5 15:37:07 2009 UTC vs.
Revision 1.67 by root, Fri Dec 31 06:18:54 2010 UTC

…		…
43		43
44	use Errno ();	44	use Errno ();
45		45
46	use AnyEvent 5.0 ();	46	use AnyEvent 5.0 ();
47	use AnyEvent::Util ();	47	use AnyEvent::Util ();
48	use AnyEvent::Socket ();
49	use AnyEvent::Handle ();	48	use AnyEvent::Handle ();
50		49
51	use base Exporter::;	50	use base Exporter::;
52		51
53	our $VERSION = '1.44';	52	our $VERSION = '1.5';
54		53
55	our @EXPORT = qw(http_get http_post http_head http_request);	54	our @EXPORT = qw(http_get http_post http_head http_request);
56		55
57	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";	56	our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
58	our $MAX_RECURSE = 10;	57	our $MAX_RECURSE = 10;
…		…
92	must be an absolute http or https URL.	91	must be an absolute http or https URL.
93		92
94	When called in void context, nothing is returned. In other contexts,	93	When called in void context, nothing is returned. In other contexts,
95	C<http_request> returns a "cancellation guard" - you have to keep the	94	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	95	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.	96	destroyed before the callback is called, the request will be cancelled.
98		97
99	The callback will be called with the response body data as first argument	98	The callback will be called with the response body data as first argument
100	(or C<undef> if an error occured), and a hash-ref with response headers as	99	(or C<undef> if an error occured), and a hash-ref with response headers as
101	second argument.	100	second argument.
102		101
103	All the headers in that hash are lowercased. In addition to the response	102	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>	103	headers, the "pseudo-headers" (uppercase to avoid clashing with possible
		104	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	105	three parts of the HTTP Status-Line of the same name. If an error occurs
		106	during the body phase of a request, then the original C<Status> and
		107	C<Reason> values from the header are available as C<OrigStatus> and
		108	C<OrigReason>.
		109
106	pseudo-header C<URL> contains the original URL (which can differ from the	110	The pseudo-header C<URL> contains the actual URL (which can differ from
107	requested URL when following redirects).	111	the requested URL when following redirects - for example, you might get
		112	an error that your URL scheme is not supported even though your URL is a
		113	valid http URL because it redirected to an ftp URL, in which case you can
		114	look at the URL pseudo header).
		115
		116	The pseudo-header C<Redirect> only exists when the request was a result
		117	of an internal redirect. In that case it is an array reference with
		118	the C<($data, $headers)> from the redirect response. Note that this
		119	response could in turn be the result of a redirect itself, and C<<
		120	$headers->{Redirect}[1]{Redirect} >> will then contain the original
		121	response, and so on.
108		122
109	If the server sends a header multiple times, then their contents will be	123	If the server sends a header multiple times, then their contents will be
110	joined together with a comma (C<,>), as per the HTTP spec.	124	joined together with a comma (C<,>), as per the HTTP spec.
111		125
112	If an internal error occurs, such as not being able to resolve a hostname,	126	If an internal error occurs, such as not being able to resolve a hostname,
…		…
199	connect (for exmaple, to bind it on a given IP address). This parameter	213	connect (for exmaple, to bind it on a given IP address). This parameter
200	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>	214	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
201	and behaves exactly the same way (e.g. it has to provide a	215	and behaves exactly the same way (e.g. it has to provide a
202	timeout). See the description for the C<$prepare_cb> argument of	216	timeout). See the description for the C<$prepare_cb> argument of
203	C<AnyEvent::Socket::tcp_connect> for details.	217	C<AnyEvent::Socket::tcp_connect> for details.
		218
		219	=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
		220
		221	In even rarer cases you want total control over how AnyEvent::HTTP
		222	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
		223	to do this, but you can provide your own C<tcp_connect> function -
		224	obviously, it has to follow the same calling conventions, except that it
		225	may always return a connection guard object.
		226
		227	There are probably lots of weird uses for this function, starting from
		228	tracing the hosts C<http_request> actually tries to connect, to (inexact
		229	but fast) host => IP address caching or even socks protocol support.
204		230
205	=item on_header => $callback->($headers)	231	=item on_header => $callback->($headers)
206		232
207	When specified, this callback will be called with the header hash as soon	233	When specified, this callback will be called with the header hash as soon
208	as headers have been successfully received from the remote server (not on	234	as headers have been successfully received from the remote server (not on
…		…
326	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	352	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
327		353
328	_slot_schedule $_[0];	354	_slot_schedule $_[0];
329	}	355	}
330		356
331	our $qr_nl = qr{\015?\012};	357	# continue to parse $_ for headers and place them into the arg
		358	sub parse_hdr() {
		359	my %hdr;
		360
		361	# things seen, not parsed:
		362	# p3pP="NON CUR OTPi OUR NOR UNI"
		363
		364	$hdr{lc $1} .= ",$2"
		365	while /\G
		366	([^:\000-\037]*):
		367	[\011\040]*
		368	((?: [^\012]+ \| \012[\011\040] )*)
		369	\012
		370	/gxc;
		371
		372	/\G$/
		373	or return;
		374
		375	# remove the "," prefix we added to all headers above
		376	substr $_, 0, 1, ""
		377	for values %hdr;
		378
		379	\%hdr
		380	}
		381
332	our $qr_nlnl = qr{(?<![^\012])\015?\012};	382	our $qr_nlnl = qr{(?<![^\012])\015?\012};
333		383
334	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	384	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
335	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	385	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
336		386
…		…
349	while (my ($k, $v) = each %$hdr) {	399	while (my ($k, $v) = each %$hdr) {
350	$hdr{lc $k} = $v;	400	$hdr{lc $k} = $v;
351	}	401	}
352	}	402	}
353		403
		404	# pseudo headers for all subsequent responses
		405	my @pseudo = (URL => $url);
		406	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		407
354	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	408	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
355		409
356	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })	410	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
357	if $recurse < 0;	411	if $recurse < 0;
358		412
359	my $proxy = $arg{proxy} \|\| $PROXY;	413	my $proxy = $arg{proxy} \|\| $PROXY;
360	my $timeout = $arg{timeout} \|\| $TIMEOUT;	414	my $timeout = $arg{timeout} \|\| $TIMEOUT;
361		415
362	my ($uscheme, $uauthority, $upath, $query, $fragment) =	416	my ($uscheme, $uauthority, $upath, $query, $fragment) =
363	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	417	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
364		418
365	$uscheme = lc $uscheme;	419	$uscheme = lc $uscheme;
366		420
367	my $uport = $uscheme eq "http" ? 80	421	my $uport = $uscheme eq "http" ? 80
368	: $uscheme eq "https" ? 443	422	: $uscheme eq "https" ? 443
369	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });	423	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
370		424
371	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	425	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
372	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });	426	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
373		427
374	my $uhost = $1;	428	my $uhost = $1;
375	$uport = $2 if defined $2;	429	$uport = $2 if defined $2;
376		430
377	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"	431	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
378	unless exists $hdr{host};	432	unless exists $hdr{host};
379		433
380	$uhost =~ s/^\[(.*)\]$/$1/;	434	$uhost =~ s/^\[(.*)\]$/$1/;
381	$upath .= "?$query" if length $query;	435	$upath .= $query if length $query;
382		436
383	$upath =~ s%^/?%/%;	437	$upath =~ s%^/?%/%;
384		438
385	# cookie processing	439	# cookie processing
386	if (my $jar = $arg{cookie_jar}) {	440	if (my $jar = $arg{cookie_jar}) {
…		…
426	} else {	480	} else {
427	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	481	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
428	}	482	}
429		483
430	# leave out fragment and query string, just a heuristic	484	# leave out fragment and query string, just a heuristic
431	$hdr{referer} \|\|= "$uscheme://$uauthority$upath" unless exists $hdr{referer};	485	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
432	$hdr{"user-agent"} \|\|= $USERAGENT unless exists $hdr{"user-agent"};	486	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
433		487
434	$hdr{"content-length"} = length $arg{body}	488	$hdr{"content-length"} = length $arg{body}
435	if length $arg{body} \|\| $method ne "GET";	489	if length $arg{body} \|\| $method ne "GET";
436		490
		491	$hdr{connection} = "close TE";
		492	$hdr{te} = "trailers" unless exists $hdr{te};
		493
437	my %state = (connect_guard => 1);	494	my %state = (connect_guard => 1);
438		495
439	_get_slot $uhost, sub {	496	_get_slot $uhost, sub {
440	$state{slot_guard} = shift;	497	$state{slot_guard} = shift;
441		498
442	return unless $state{connect_guard};	499	return unless $state{connect_guard};
443		500
444	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	501	my $connect_cb = sub {
445	$state{fh} = shift	502	$state{fh} = shift
446	or do {	503	or do {
447	my $err = "$!";	504	my $err = "$!";
448	%state = ();	505	%state = ();
449	return $cb->(undef, { Status => 599, Reason => $err, URL => $url });	506	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
450	};	507	};
451		508
452	pop; # free memory, save a tree	509	pop; # free memory, save a tree
453		510
454	return unless delete $state{connect_guard};	511	return unless delete $state{connect_guard};
455		512
456	# get handle	513	# get handle
457	$state{handle} = new AnyEvent::Handle	514	$state{handle} = new AnyEvent::Handle
458	fh => $state{fh},	515	fh => $state{fh},
		516	peername => $rhost,
		517	tls_ctx => $arg{tls_ctx},
		518	# these need to be reconfigured on keepalive handles
459	timeout => $timeout,	519	timeout => $timeout,
460	peername => $rhost,	520	on_error => sub {
461	tls_ctx => $arg{tls_ctx};	521	%state = ();
		522	$cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
		523	},
		524	on_eof => sub {
		525	%state = ();
		526	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
		527	},
		528	;
462		529
463	# limit the number of persistent connections	530	# limit the number of persistent connections
464	# keepalive not yet supported	531	# keepalive not yet supported
465	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	532	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
466	++$KA_COUNT{$_[1]};	533	# ++$KA_COUNT{$_[1]};
467	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {	534	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
468	--$KA_COUNT{$_[1]}	535	# --$KA_COUNT{$_[1]}
469	};	536	# };
470	$hdr{connection} = "keep-alive";	537	# $hdr{connection} = "keep-alive";
471	} else {	538	# } else {
472	delete $hdr{connection};	539	# delete $hdr{connection};
473	}	540	# }
474
475	# (re-)configure handle
476	$state{handle}->on_error (sub {
477	%state = ();
478	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
479	});
480	$state{handle}->on_eof (sub {
481	%state = ();
482	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
483	});
484		541
485	$state{handle}->starttls ("connect") if $rscheme eq "https";	542	$state{handle}->starttls ("connect") if $rscheme eq "https";
486		543
487	# handle actual, non-tunneled, request	544	# handle actual, non-tunneled, request
488	my $handle_actual_request = sub {	545	my $handle_actual_request = sub {
489	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};	546	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
490		547
491	# send request	548	# send request
492	$state{handle}->push_write (	549	$state{handle}->push_write (
493	"$method $rpath HTTP/1.0\015\012"	550	"$method $rpath HTTP/1.1\015\012"
494	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)	551	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
495	. "\015\012"	552	. "\015\012"
496	. (delete $arg{body})	553	. (delete $arg{body})
497	);	554	);
498		555
		556	# return if error occured during push_write()
		557	return unless %state;
		558
499	%hdr = (); # reduce memory usage, save a kitten	559	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
500		560
501	# status line	561	# status line and headers
502	$state{handle}->push_read (line => $qr_nl, sub {	562	$state{handle}->push_read (line => $qr_nlnl, sub {
503	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix	563	my $keepalive = pop;
504	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
505		564
506	my %hdr = ( # response headers
507	HTTPVersion => ",$1",
508	Status => ",$2",
509	Reason => ",$3",
510	URL => ",$url"
511	);
512
513	# headers, could be optimized a bit
514	$state{handle}->unshift_read (line => $qr_nlnl, sub {
515	for ("$_[1]") {	565	for ("$_[1]") {
516	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	566	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
517		567
518	# things seen, not parsed:	568	/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc
519	# p3pP="NON CUR OTPi OUR NOR UNI"	569	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
520		570
521	$hdr{lc $1} .= ",$2"	571	push @pseudo,
522	while /\G	572	HTTPVersion => $1,
523	([^:\000-\037]*):	573	Status => $2,
524	[\011\040]*	574	Reason => $3,
525	((?: [^\012]+ \| \012[\011\040] )*)
526	\012
527	/gxc;
528
529	/\G$/	575	;
		576
		577	my $hdr = parse_hdr
530	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));	578	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
		579
		580	%hdr = (%$hdr, @pseudo);
		581	}
		582
		583	# redirect handling
		584	# microsoft and other shitheads don't give a shit for following standards,
		585	# try to support some common forms of broken Location headers.
		586	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		587	$hdr{location} =~ s/^\.\/+//;
		588
		589	my $url = "$rscheme://$uhost:$uport";
		590
		591	unless ($hdr{location} =~ s/^\///) {
		592	$url .= $upath;
		593	$url =~ s/\/[^\/]*$//;
531	}	594	}
532		595
533	substr $_, 0, 1, ""
534	for values %hdr;
535
536	# redirect handling
537	# microsoft and other shitheads don't give a shit for following standards,
538	# try to support some common forms of broken Location headers.
539	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
540	$hdr{location} =~ s/^\.\/+//;
541
542	my $url = "$rscheme://$uhost:$uport";
543
544	unless ($hdr{location} =~ s/^\///) {
545	$url .= $upath;
546	$url =~ s/\/[^\/]*$//;
547	}
548
549	$hdr{location} = "$url/$hdr{location}";	596	$hdr{location} = "$url/$hdr{location}";
		597	}
		598
		599	my $redirect;
		600
		601	if ($recurse) {
		602	my $status = $hdr{Status};
		603
		604	# industry standard is to redirect POST as GET for
		605	# 301, 302 and 303, in contrast to http/1.0 and 1.1.
		606	# also, the UA should ask the user for 301 and 307 and POST,
		607	# industry standard seems to be to simply follow.
		608	# we go with the industry standard.
		609	if ($status == 301 or $status == 302 or $status == 303) {
		610	# HTTP/1.1 is unclear on how to mutate the method
		611	$method = "GET" unless $method eq "HEAD";
		612	$redirect = 1;
		613	} elsif ($status == 307) {
		614	$redirect = 1;
550	}	615	}
		616	}
551		617
552	my $redirect;	618	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
		619	$state{handle}->destroy if $state{handle};
		620	%state = ();
553		621
		622	if (defined $_[1]) {
		623	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		624	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		625	}
		626
		627	# set-cookie processing
554	if ($recurse) {	628	if ($arg{cookie_jar}) {
555	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {	629	for ($hdr{"set-cookie"}) {
556	# apparently, mozilla et al. just change POST to GET here	630	# parse NAME=VALUE
557	# more research is needed before we do the same	631	my @kv;
		632
		633	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
558	$redirect = 1;	634	my $name = $1;
559	} elsif ($hdr{Status} == 303) {	635	my $value = $3;
560	# even http/1.1 is unclear on how to mutate the method	636
561	$method = "GET" unless $method eq "HEAD";	637	unless ($value) {
		638	$value = $2;
		639	$value =~ s/\\(.)/$1/gs;
		640	}
		641
		642	push @kv, $name => $value;
		643
		644	last unless /\G\s*;/gc;
		645	}
		646
		647	last unless @kv;
		648
		649	my $name = shift @kv;
		650	my %kv = (value => shift @kv, @kv);
		651
		652	my $cdom;
		653	my $cpath = (delete $kv{path}) \|\| "/";
		654
		655	if (exists $kv{domain}) {
		656	$cdom = delete $kv{domain};
		657
		658	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		659
		660	next if $cdom =~ /\.$/;
		661
		662	# this is not rfc-like and not netscape-like. go figure.
		663	my $ndots = $cdom =~ y/.//;
		664	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		665	} else {
		666	$cdom = $uhost;
		667	}
		668
562	$redirect = 1;	669	# store it
563	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET\|HEAD)$/) {	670	$arg{cookie_jar}{version} = 1;
564	$redirect = 1;	671	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
		672
		673	redo if /\G\s*,/gc;
565	}	674	}
566	}	675	}
567		676
568	my $finish = sub {
569	$state{handle}->destroy if $state{handle};
570	%state = ();
571
572	# set-cookie processing
573	if ($arg{cookie_jar}) {
574	for ($_[1]{"set-cookie"}) {
575	# parse NAME=VALUE
576	my @kv;
577
578	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
579	my $name = $1;
580	my $value = $3;
581
582	unless ($value) {
583	$value = $2;
584	$value =~ s/\\(.)/$1/gs;
585	}
586
587	push @kv, $name => $value;
588
589	last unless /\G\s*;/gc;
590	}
591
592	last unless @kv;
593
594	my $name = shift @kv;
595	my %kv = (value => shift @kv, @kv);
596
597	my $cdom;
598	my $cpath = (delete $kv{path}) \|\| "/";
599
600	if (exists $kv{domain}) {
601	$cdom = delete $kv{domain};
602
603	$cdom =~ s/^\.?/./; # make sure it starts with a "."
604
605	next if $cdom =~ /\.$/;
606
607	# this is not rfc-like and not netscape-like. go figure.
608	my $ndots = $cdom =~ y/.//;
609	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
610	} else {
611	$cdom = $uhost;
612	}
613
614	# store it
615	$arg{cookie_jar}{version} = 1;
616	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
617
618	redo if /\G\s*,/gc;
619	}
620	}
621
622	if ($redirect && exists $hdr{location}) {	677	if ($redirect && exists $hdr{location}) {
623	# we ignore any errors, as it is very common to receive	678	# we ignore any errors, as it is very common to receive
624	# Content-Length != 0 but no actual body	679	# Content-Length != 0 but no actual body
625	# we also access %hdr, as $_[1] might be an erro	680	# we also access %hdr, as $_[1] might be an erro
626	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);	681	http_request (
627	} else {	682	$method => $hdr{location},
628	$cb->($_[0], $_[1]);
629	}	683	%arg,
		684	recurse => $recurse - 1,
		685	Redirect => [$_[0], \%hdr],
630	};	686	$cb);
631
632	my $len = $hdr{"content-length"};
633
634	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
635	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
636	} elsif (
637	$hdr{Status} =~ /^(?:1..\|[23]04)$/
638	or $method eq "HEAD"
639	or (defined $len && !$len)
640	) {
641	# no body
642	$finish->("", \%hdr);
643	} else {	687	} else {
		688	$cb->($_[0], \%hdr);
		689	}
		690	};
		691
		692	my $len = $hdr{"content-length"};
		693
		694	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		695	$finish->(undef, 598 => "Request cancelled by on_header");
		696	} elsif (
		697	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		698	or $method eq "HEAD"
		699	or (defined $len && !$len)
		700	) {
		701	# no body
		702	$finish->("", undef, undef, 1);
		703	} else {
644	# body handling, four different code paths	704	# body handling, many different code paths
645	# for want_body_handle, on_body (2x), normal (2x)	705	# - no body expected
646	# we might read too much here, but it does not matter yet (no pers. connections)	706	# - want_body_handle
		707	# - te chunked
		708	# - 2x length known (with or without on_body)
		709	# - 2x length not known (with or without on_body)
647	if (!$redirect && $arg{want_body_handle}) {	710	if (!$redirect && $arg{want_body_handle}) {
648	$_[0]->on_eof (undef);	711	$_[0]->on_eof (undef);
649	$_[0]->on_error (undef);	712	$_[0]->on_error (undef);
650	$_[0]->on_read (undef);	713	$_[0]->on_read (undef);
651		714
652	$finish->(delete $state{handle}, \%hdr);	715	$finish->(delete $state{handle});
653		716
654	} elsif ($arg{on_body}) {	717	} elsif ($hdr{"transfer-encoding"} =~ /chunked/) {
		718	my $body = undef;
		719	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		720
655	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });	721	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		722
		723	my $read_chunk; $read_chunk = sub {
		724	$_[1] =~ /^([0-9a-fA-F]+)/
		725	or $finish->(undef, 599 => "Garbled chunked transfer encoding");
		726
		727	my $len = hex $1;
		728
656	if ($len) {	729	if ($len) {
657	$_[0]->on_eof (undef);	730	$_[0]->push_read (chunk => hex $1, sub {
		731	$on_body->($_[1], \%hdr)
		732	or return $finish->(undef, 598 => "Request cancelled by on_body");
		733
658	$_[0]->on_read (sub {	734	$_[0]->push_read (line => sub {
659	$len -= length $_[0]{rbuf};	735	length $_[1]
660		736	and return $finish->(undef, 599 => "Garbled chunked transfer encoding");
661	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)	737	$_[0]->push_read (line => $read_chunk);
662	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
663
664	$len > 0	738	});
665	or $finish->("", \%hdr);
666	});	739	});
667	} else {	740	} else {
668	$_[0]->on_eof (sub {	741	$_[0]->push_read (line => $qr_nlnl, sub {
669	$finish->("", \%hdr);	742	if (length $_[1]) {
		743	for ("$_[1]") {
		744	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		745
		746	my $hdr = parse_hdr
		747	or return $finish->(undef, 599 => "Garbled response trailers");
		748
		749	%hdr = (%hdr, %$hdr);
		750	}
670	});	751	}
671	$_[0]->on_read (sub {	752
672	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)	753	$finish->($body, undef, undef, 1);
673	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
674	});	754	});
675	}	755	}
		756	};
		757
		758	$_[0]->push_read (line => $read_chunk);
		759
		760	} elsif ($arg{on_body}) {
		761	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		762
		763	if ($len) {
		764	$_[0]->on_read (sub {
		765	$len -= length $_[0]{rbuf};
		766
		767	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		768	or return $finish->(undef, 598 => "Request cancelled by on_body");
		769
		770	$len > 0
		771	or $finish->("", undef, undef, 1);
		772	});
676	} else {	773	} else {
677	$_[0]->on_eof (undef);	774	$_[0]->on_eof (sub {
678		775	$finish->("");
679	if ($len) {	776	});
680	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
681	$_[0]->on_read (sub {	777	$_[0]->on_read (sub {
		778	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		779	or $finish->(undef, 598 => "Request cancelled by on_body");
		780	});
		781	}
		782	} else {
		783	$_[0]->on_eof (undef);
		784
		785	if ($len) {
		786	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		787	$_[0]->on_read (sub {
682	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)	788	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
683	if $len <= length $_[0]{rbuf};	789	if $len <= length $_[0]{rbuf};
684	});	790	});
685	} else {	791	} else {
686	$_[0]->on_error (sub {	792	$_[0]->on_error (sub {
687	$! == Errno::EPIPE \|\| !$!	793	($! == Errno::EPIPE \|\| !$!)
688	? $finish->(delete $_[0]{rbuf}, \%hdr)	794	? $finish->(delete $_[0]{rbuf})
689	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });	795	: $finish->(undef, 599 => $_[2]);
690	});	796	});
691	$_[0]->on_read (sub { });	797	$_[0]->on_read (sub { });
692	}
693	}	798	}
694	}	799	}
695	});	800	}
696	});	801	});
697	};	802	};
698		803
699	# now handle proxy-CONNECT method	804	# now handle proxy-CONNECT method
700	if ($proxy && $uscheme eq "https") {	805	if ($proxy && $uscheme eq "https") {
…		…
702		807
703	# maybe re-use $uauthority with patched port?	808	# maybe re-use $uauthority with patched port?
704	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");	809	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
705	$state{handle}->push_read (line => $qr_nlnl, sub {	810	$state{handle}->push_read (line => $qr_nlnl, sub {
706	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix	811	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
707	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));	812	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
708		813
709	if ($2 == 200) {	814	if ($2 == 200) {
710	$rpath = $upath;	815	$rpath = $upath;
711	&$handle_actual_request;	816	&$handle_actual_request;
712	} else {	817	} else {
713	%state = ();	818	%state = ();
714	$cb->(undef, { Status => $2, Reason => $3, URL => $url });	819	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
715	}	820	}
716	});	821	});
717	} else {	822	} else {
718	&$handle_actual_request;	823	&$handle_actual_request;
719	}	824	}
		825	};
720		826
721	}, $arg{on_prepare} \|\| sub { $timeout };	827	my $tcp_connect = $arg{tcp_connect}
		828	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		829
		830	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		831
722	};	832	};
723		833
724	defined wantarray && AnyEvent::Util::guard { %state = () }	834	defined wantarray && AnyEvent::Util::guard { %state = () }
725	}	835	}
726		836
…		…
740	&http_request	850	&http_request
741	}	851	}
742		852
743	=back	853	=back
744		854
		855	=head2 DNS CACHING
		856
		857	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		858	the actual connection, which in turn uses AnyEvent::DNS to resolve
		859	hostnames. The latter is a simple stub resolver and does no caching
		860	on its own. If you want DNS caching, you currently have to provide
		861	your own default resolver (by storing a suitable resolver object in
		862	C<$AnyEvent::DNS::RESOLVER>).
		863
745	=head2 GLOBAL FUNCTIONS AND VARIABLES	864	=head2 GLOBAL FUNCTIONS AND VARIABLES
746		865
747	=over 4	866	=over 4
748		867
749	=item AnyEvent::HTTP::set_proxy "proxy-url"	868	=item AnyEvent::HTTP::set_proxy "proxy-url"
…		…
752	string of the form C<http://host:port> (optionally C<https:...>), croaks	871	string of the form C<http://host:port> (optionally C<https:...>), croaks
753	otherwise.	872	otherwise.
754		873
755	To clear an already-set proxy, use C<undef>.	874	To clear an already-set proxy, use C<undef>.
756		875
		876	=item $date = AnyEvent::HTTP::format_date $timestamp
		877
		878	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		879	Date (RFC 2616).
		880
		881	=item $timestamp = AnyEvent::HTTP::parse_date $date
		882
		883	Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX
		884	timestamp, or C<undef> if the date cannot be parsed.
		885
757	=item $AnyEvent::HTTP::MAX_RECURSE	886	=item $AnyEvent::HTTP::MAX_RECURSE
758		887
759	The default value for the C<recurse> request parameter (default: C<10>).	888	The default value for the C<recurse> request parameter (default: C<10>).
760		889
761	=item $AnyEvent::HTTP::USERAGENT	890	=item $AnyEvent::HTTP::USERAGENT
…		…
779	connections. This number of can be useful for load-leveling.	908	connections. This number of can be useful for load-leveling.
780		909
781	=back	910	=back
782		911
783	=cut	912	=cut
		913
		914	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		915	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		916
		917	sub format_date($) {
		918	my ($time) = @_;
		919
		920	# RFC 822/1123 format
		921	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		922
		923	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		924	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		925	$H, $M, $S;
		926	}
		927
		928	sub parse_date($) {
		929	my ($date) = @_;
		930
		931	my ($d, $m, $y, $H, $M, $S);
		932
		933	if ($date =~ /^[A-Z][a-z][a-z], ([0-9][0-9]) ([A-Z][a-z][a-z]) ([0-9][0-9][0-9][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) GMT$/) {
		934	# RFC 822/1123, required by RFC 2616
		935	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		936
		937	} elsif ($date =~ /^[A-Z][a-z]+, ([0-9][0-9])-([A-Z][a-z][a-z])-([0-9][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) GMT$/) {
		938	# RFC 850
		939	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		940
		941	} elsif ($date =~ /^[A-Z][a-z][a-z] ([A-Z][a-z][a-z]) ([0-9 ][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) ([0-9][0-9][0-9][0-9])$/) {
		942	# ISO C's asctime
		943	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		944	}
		945	# other formats fail in the loop below
		946
		947	for (0..11) {
		948	if ($m eq $month[$_]) {
		949	require Time::Local;
		950	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		951	}
		952	}
		953
		954	undef
		955	}
784		956
785	sub set_proxy($) {	957	sub set_proxy($) {
786	if (length $_[0]) {	958	if (length $_[0]) {
787	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix	959	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
788	or Carp::croak "$_[0]: invalid proxy URL";	960	or Carp::croak "$_[0]: invalid proxy URL";
…		…
795	# initialise proxy from environment	967	# initialise proxy from environment
796	eval {	968	eval {
797	set_proxy $ENV{http_proxy};	969	set_proxy $ENV{http_proxy};
798	};	970	};
799		971
		972	=head2 SOCKS PROXIES
		973
		974	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		975	compile your perl to support socks, or use an external program such as
		976	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		977	transparently.
		978
		979	Alternatively, for AnyEvent::HTTP only, you can use your own
		980	C<tcp_connect> function that does the proxy handshake - here is an example
		981	that works with socks4a proxies:
		982
		983	use Errno;
		984	use AnyEvent::Util;
		985	use AnyEvent::Socket;
		986	use AnyEvent::Handle;
		987
		988	# host, port and username of/for your socks4a proxy
		989	my $socks_host = "10.0.0.23";
		990	my $socks_port = 9050;
		991	my $socks_user = "";
		992
		993	sub socks4a_connect {
		994	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		995
		996	my $hdl = new AnyEvent::Handle
		997	connect => [$socks_host, $socks_port],
		998	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		999	on_error => sub { $connect_cb->() },
		1000	;
		1001
		1002	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1003
		1004	$hdl->push_read (chunk => 8, sub {
		1005	my ($hdl, $chunk) = @_;
		1006	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1007
		1008	if ($status == 0x5a) {
		1009	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1010	} else {
		1011	$! = Errno::ENXIO; $connect_cb->();
		1012	}
		1013	});
		1014
		1015	$hdl
		1016	}
		1017
		1018	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1019	possibly after switching off other proxy types:
		1020
		1021	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1022
		1023	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1024	my ($data, $headers) = @_;
		1025	...
		1026	};
		1027
800	=head1 SEE ALSO	1028	=head1 SEE ALSO
801		1029
802	L<AnyEvent>.	1030	L<AnyEvent>.
803		1031
804	=head1 AUTHOR	1032	=head1 AUTHOR

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.53 by root, Sat Dec 5 15:37:07 2009 UTC vs. Revision 1.67 by root, Fri Dec 31 06:18:54 2010 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.53 by root, Sat Dec 5 15:37:07 2009 UTC vs.
Revision 1.67 by root, Fri Dec 31 06:18:54 2010 UTC