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

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.44 by root, Tue Jul 7 00:15:32 2009 UTC vs.
Revision 1.76 by root, Sat Jan 1 02:20:49 2011 UTC

…		…
41	use strict;	41	use strict;
42	no warnings;	42	no warnings;
43		43
44	use Errno ();	44	use Errno ();
45		45
46	use AnyEvent 4.8 ();	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 = '1.4';	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
101	second argument.	100	(and trailers) as 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,
…		…
136	Whether to recurse requests or not, e.g. on redirects, authentication	150	Whether to recurse requests or not, e.g. on redirects, authentication
137	retries and so on, and how often to do so.	151	retries and so on, and how often to do so.
138		152
139	=item headers => hashref	153	=item headers => hashref
140		154
141	The request headers to use. Currently, C<http_request> may provide its	155	The request headers to use. Currently, C<http_request> may provide its own
142	own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers	156	C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and
143	and will provide defaults for C<User-Agent:> and C<Referer:>.	157	will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:>
		158	(this can be suppressed by using C<undef> for these headers in which case
		159	they won't be sent at all).
144		160
145	=item timeout => $seconds	161	=item timeout => $seconds
146		162
147	The time-out to use for various stages - each connect attempt will reset	163	The time-out to use for various stages - each connect attempt will reset
148	the timeout, as will read or write activity. Default timeout is 5 minutes.	164	the timeout, as will read or write activity, i.e. this is not an overall
		165	timeout.
		166
		167	Default timeout is 5 minutes.
149		168
150	=item proxy => [$host, $port[, $scheme]] or undef	169	=item proxy => [$host, $port[, $scheme]] or undef
151		170
152	Use the given http proxy for all requests. If not specified, then the	171	Use the given http proxy for all requests. If not specified, then the
153	default proxy (as specified by C<$ENV{http_proxy}>) is used.	172	default proxy (as specified by C<$ENV{http_proxy}>) is used.
154		173
155	C<$scheme> must be either missing or C<http> for HTTP, or C<https> for	174	C<$scheme> must be either missing, C<http> for HTTP or C<https> for
156	HTTPS.	175	HTTPS.
157		176
158	=item body => $string	177	=item body => $string
159		178
160	The request body, usually empty. Will be-sent as-is (future versions of	179	The request body, usually empty. Will be sent as-is (future versions of
161	this module might offer more options).	180	this module might offer more options).
162		181
163	=item cookie_jar => $hash_ref	182	=item cookie_jar => $hash_ref
164		183
165	Passing this parameter enables (simplified) cookie-processing, loosely	184	Passing this parameter enables (simplified) cookie-processing, loosely
166	based on the original netscape specification.	185	based on the original netscape specification.
167		186
168	The C<$hash_ref> must be an (initially empty) hash reference which will	187	The C<$hash_ref> must be an (initially empty) hash reference which will
169	get updated automatically. It is possible to save the cookie_jar to	188	get updated automatically. It is possible to save the cookie jar to
170	persistent storage with something like JSON or Storable, but this is not	189	persistent storage with something like JSON or Storable, but this is not
171	recommended, as expiry times are currently being ignored.	190	recommended, as session-only cookies might survive longer than expected.
172		191
173	Note that this cookie implementation is not of very high quality, nor	192	Note that this cookie implementation is not meant to be complete. If
174	meant to be complete. If you want complete cookie management you have to	193	you want complete cookie management you have to do that on your
175	do that on your own. C<cookie_jar> is meant as a quick fix to get some	194	own. C<cookie_jar> is meant as a quick fix to get some cookie-using sites
176	cookie-using sites working. Cookies are a privacy disaster, do not use	195	working. Cookies are a privacy disaster, do not use them unless required
177	them unless required to.	196	to.
		197
		198	When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:>
		199	headers will be set and handled by this module, otherwise they will be
		200	left untouched.
178		201
179	=item tls_ctx => $scheme \| $tls_ctx	202	=item tls_ctx => $scheme \| $tls_ctx
180		203
181	Specifies the AnyEvent::TLS context to be used for https connections. This	204	Specifies the AnyEvent::TLS context to be used for https connections. This
182	parameter follows the same rules as the C<tls_ctx> parameter to	205	parameter follows the same rules as the C<tls_ctx> parameter to
…		…
186	verification) TLS context.	209	verification) TLS context.
187		210
188	The default for this option is C<low>, which could be interpreted as "give	211	The default for this option is C<low>, which could be interpreted as "give
189	me the page, no matter what".	212	me the page, no matter what".
190		213
		214	=item on_prepare => $callback->($fh)
		215
		216	In rare cases you need to "tune" the socket before it is used to
		217	connect (for exmaple, to bind it on a given IP address). This parameter
		218	overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
		219	and behaves exactly the same way (e.g. it has to provide a
		220	timeout). See the description for the C<$prepare_cb> argument of
		221	C<AnyEvent::Socket::tcp_connect> for details.
		222
		223	=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
		224
		225	In even rarer cases you want total control over how AnyEvent::HTTP
		226	establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
		227	to do this, but you can provide your own C<tcp_connect> function -
		228	obviously, it has to follow the same calling conventions, except that it
		229	may always return a connection guard object.
		230
		231	There are probably lots of weird uses for this function, starting from
		232	tracing the hosts C<http_request> actually tries to connect, to (inexact
		233	but fast) host => IP address caching or even socks protocol support.
		234
191	=item on_header => $callback->($headers)	235	=item on_header => $callback->($headers)
192		236
193	When specified, this callback will be called with the header hash as soon	237	When specified, this callback will be called with the header hash as soon
194	as headers have been successfully received from the remote server (not on	238	as headers have been successfully received from the remote server (not on
195	locally-generated errors).	239	locally-generated errors).
…		…
200		244
201	This callback is useful, among other things, to quickly reject unwanted	245	This callback is useful, among other things, to quickly reject unwanted
202	content, which, if it is supposed to be rare, can be faster than first	246	content, which, if it is supposed to be rare, can be faster than first
203	doing a C<HEAD> request.	247	doing a C<HEAD> request.
204		248
		249	The downside is that cancelling the request makes it impossible to re-use
		250	the connection. Also, the C<on_header> callback will not receive any
		251	trailer (headers sent after the response body).
		252
205	Example: cancel the request unless the content-type is "text/html".	253	Example: cancel the request unless the content-type is "text/html".
206		254
207	on_header => sub {	255	on_header => sub {
208	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/	256	$_[0]{"content-type"} =~ /^text\/html\s*(?:;\|$)/
209	},	257	},
…		…
216		264
217	It has to return either true (in which case AnyEvent::HTTP will continue),	265	It has to return either true (in which case AnyEvent::HTTP will continue),
218	or false, in which case AnyEvent::HTTP will cancel the download (and call	266	or false, in which case AnyEvent::HTTP will cancel the download (and call
219	the completion callback with an error code of C<598>).	267	the completion callback with an error code of C<598>).
220		268
		269	The downside to cancelling the request is that it makes it impossible to
		270	re-use the connection.
		271
221	This callback is useful when the data is too large to be held in memory	272	This callback is useful when the data is too large to be held in memory
222	(so the callback writes it to a file) or when only some information should	273	(so the callback writes it to a file) or when only some information should
223	be extracted, or when the body should be processed incrementally.	274	be extracted, or when the body should be processed incrementally.
224		275
225	It is usually preferred over doing your own body handling via	276	It is usually preferred over doing your own body handling via
226	C<want_body_handle>.	277	C<want_body_handle>, but in case of streaming APIs, where HTTP is
		278	only used to create a connection, C<want_body_handle> is the better
		279	alternative, as it allows you to install your own event handler, reducing
		280	resource usage.
227		281
228	=item want_body_handle => $enable	282	=item want_body_handle => $enable
229		283
230	When enabled (default is disabled), the behaviour of AnyEvent::HTTP	284	When enabled (default is disabled), the behaviour of AnyEvent::HTTP
231	changes considerably: after parsing the headers, and instead of	285	changes considerably: after parsing the headers, and instead of
…		…
243	This is useful with some push-type services, where, after the initial	297	This is useful with some push-type services, where, after the initial
244	headers, an interactive protocol is used (typical example would be the	298	headers, an interactive protocol is used (typical example would be the
245	push-style twitter API which starts a JSON/XML stream).	299	push-style twitter API which starts a JSON/XML stream).
246		300
247	If you think you need this, first have a look at C<on_body>, to see if	301	If you think you need this, first have a look at C<on_body>, to see if
248	that doesn'T solve your problem in a better way.	302	that doesn't solve your problem in a better way.
249		303
250	=back	304	=back
251		305
252	Example: make a simple HTTP GET request for http://www.nethype.de/	306	Example: do a simple HTTP GET request for http://www.nethype.de/ and print
		307	the response body.
253		308
254	http_request GET => "http://www.nethype.de/", sub {	309	http_request GET => "http://www.nethype.de/", sub {
255	my ($body, $hdr) = @_;	310	my ($body, $hdr) = @_;
256	print "$body\n";	311	print "$body\n";
257	};	312	};
258		313
259	Example: make a HTTP HEAD request on https://www.google.com/, use a	314	Example: do a HTTP HEAD request on https://www.google.com/, use a
260	timeout of 30 seconds.	315	timeout of 30 seconds.
261		316
262	http_request	317	http_request
263	GET => "https://www.google.com",	318	GET => "https://www.google.com",
264	timeout => 30,	319	timeout => 30,
…		…
267	use Data::Dumper;	322	use Data::Dumper;
268	print Dumper $hdr;	323	print Dumper $hdr;
269	}	324	}
270	;	325	;
271		326
272	Example: make another simple HTTP GET request, but immediately try to	327	Example: do another simple HTTP GET request, but immediately try to
273	cancel it.	328	cancel it.
274		329
275	my $request = http_request GET => "http://www.nethype.de/", sub {	330	my $request = http_request GET => "http://www.nethype.de/", sub {
276	my ($body, $hdr) = @_;	331	my ($body, $hdr) = @_;
277	print "$body\n";	332	print "$body\n";
…		…
309	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];	364	push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
310		365
311	_slot_schedule $_[0];	366	_slot_schedule $_[0];
312	}	367	}
313		368
314	our $qr_nl = qr<\015?\012>;	369	# extract cookies from jar
315	our $qr_nlnl = qr<\015?\012\015?\012>;	370	sub cookie_jar_extract($$$$) {
		371	my ($jar, $uscheme, $uhost, $upath) = @_;
		372
		373	%$jar = () if $jar->{version} != 1;
		374
		375	my @cookies;
		376
		377	while (my ($chost, $paths) = each %$jar) {
		378	next unless ref $paths;
		379
		380	if ($chost =~ /^\./) {
		381	next unless $chost eq substr $uhost, -length $chost;
		382	} elsif ($chost =~ /\./) {
		383	next unless $chost eq $uhost;
		384	} else {
		385	next;
		386	}
		387
		388	while (my ($cpath, $cookies) = each %$paths) {
		389	next unless $cpath eq substr $upath, 0, length $cpath;
		390
		391	while (my ($cookie, $kv) = each %$cookies) {
		392	next if $uscheme ne "https" && exists $kv->{secure};
		393
		394	if (exists $kv->{expires}) {
		395	if (AE::now > parse_date ($kv->{expires})) {
		396	delete $cookies->{$cookie};
		397	next;
		398	}
		399	}
		400
		401	my $value = $kv->{value};
		402
		403	if ($value =~ /[=;,[:space:]]/) {
		404	$value =~ s/([\\"])/\\$1/g;
		405	$value = "\"$value\"";
		406	}
		407
		408	push @cookies, "$cookie=$value";
		409	}
		410	}
		411	}
		412
		413	\@cookies
		414	}
		415
		416	# parse set_cookie header into jar
		417	sub cookie_jar_set_cookie($$$) {
		418	my ($jar, $set_cookie, $uhost) = @_;
		419
		420	for ($set_cookie) {
		421	# parse NAME=VALUE
		422	my @kv;
		423
		424	while (
		425	m{
		426	\G\s*
		427	(?:
		428	expires \s=\s ([A-Z][a-z][a-z],\ [^,;]+)
		429	\| ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )
		430	)
		431	}gcxsi
		432	) {
		433	my $name = $2;
		434	my $value = $4;
		435
		436	unless (defined $name) {
		437	# expires
		438	$name = "expires";
		439	$value = $1;
		440	} elsif (!defined $value) {
		441	# quoted
		442	$value = $3;
		443	$value =~ s/\\(.)/$1/gs;
		444	}
		445
		446	push @kv, lc $name, $value;
		447
		448	last unless /\G\s*;/gc;
		449	}
		450
		451	last unless @kv;
		452
		453	my $name = shift @kv;
		454	my %kv = (value => shift @kv, @kv);
		455
		456	$kv{expires} \|\|= format_date (AE::now + $kv{"max-age"})
		457	if exists $kv{"max-age"};
		458
		459	my $cdom;
		460	my $cpath = (delete $kv{path}) \|\| "/";
		461
		462	if (exists $kv{domain}) {
		463	$cdom = delete $kv{domain};
		464
		465	$cdom =~ s/^\.?/./; # make sure it starts with a "."
		466
		467	next if $cdom =~ /\.$/;
		468
		469	# this is not rfc-like and not netscape-like. go figure.
		470	my $ndots = $cdom =~ y/.//;
		471	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
		472	} else {
		473	$cdom = $uhost;
		474	}
		475
		476	# store it
		477	$jar->{version} = 1;
		478	$jar->{$cdom}{$cpath}{$name} = \%kv;
		479
		480	redo if /\G\s*,/gc;
		481	}
		482	}
		483
		484	# continue to parse $_ for headers and place them into the arg
		485	sub parse_hdr() {
		486	my %hdr;
		487
		488	# things seen, not parsed:
		489	# p3pP="NON CUR OTPi OUR NOR UNI"
		490
		491	$hdr{lc $1} .= ",$2"
		492	while /\G
		493	([^:\000-\037]*):
		494	[\011\040]*
		495	((?: [^\012]+ \| \012[\011\040] )*)
		496	\012
		497	/gxc;
		498
		499	/\G$/
		500	or return;
		501
		502	# remove the "," prefix we added to all headers above
		503	substr $_, 0, 1, ""
		504	for values %hdr;
		505
		506	\%hdr
		507	}
		508
		509	our $qr_nlnl = qr{(?<![^\012])\015?\012};
316		510
317	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };	511	our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
318	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };	512	our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
319		513
320	sub http_request($$@) {	514	sub http_request($$@) {
…		…
332	while (my ($k, $v) = each %$hdr) {	526	while (my ($k, $v) = each %$hdr) {
333	$hdr{lc $k} = $v;	527	$hdr{lc $k} = $v;
334	}	528	}
335	}	529	}
336		530
		531	# pseudo headers for all subsequent responses
		532	my @pseudo = (URL => $url);
		533	push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
		534
337	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;	535	my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
338		536
339	return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })	537	return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
340	if $recurse < 0;	538	if $recurse < 0;
341		539
342	my $proxy = $arg{proxy} \|\| $PROXY;	540	my $proxy = $arg{proxy} \|\| $PROXY;
343	my $timeout = $arg{timeout} \|\| $TIMEOUT;	541	my $timeout = $arg{timeout} \|\| $TIMEOUT;
344		542
345	my ($uscheme, $uauthority, $upath, $query, $fragment) =	543	my ($uscheme, $uauthority, $upath, $query, $fragment) =
346	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:\?([^#]))?(?:#(.))?\|;	544	$url =~ m\|(?:([^:/?#]+):)?(?://([^/?#]))?([^?#])(?:(\?[^#]))?(?:#(.))?\|;
347		545
348	$uscheme = lc $uscheme;	546	$uscheme = lc $uscheme;
349		547
350	my $uport = $uscheme eq "http" ? 80	548	my $uport = $uscheme eq "http" ? 80
351	: $uscheme eq "https" ? 443	549	: $uscheme eq "https" ? 443
352	: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });	550	: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
353		551
354	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x	552	$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
355	or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });	553	or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
356		554
357	my $uhost = $1;	555	my $uhost = $1;
358	$uport = $2 if defined $2;	556	$uport = $2 if defined $2;
359		557
360	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";	558	$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
		559	unless exists $hdr{host};
361		560
362	$uhost =~ s/^\[(.*)\]$/$1/;	561	$uhost =~ s/^\[(.*)\]$/$1/;
363	$upath .= "?$query" if length $query;	562	$upath .= $query if length $query;
364		563
365	$upath =~ s%^/?%/%;	564	$upath =~ s%^/?%/%;
366		565
367	# cookie processing	566	# cookie processing
368	if (my $jar = $arg{cookie_jar}) {	567	if (my $jar = $arg{cookie_jar}) {
369	%$jar = () if $jar->{version} != 1;	568	my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath;
370		569
371	my @cookie;
372
373	while (my ($chost, $v) = each %$jar) {
374	if ($chost =~ /^\./) {
375	next unless $chost eq substr $uhost, -length $chost;
376	} elsif ($chost =~ /\./) {
377	next unless $chost eq $uhost;
378	} else {
379	next;
380	}
381
382	while (my ($cpath, $v) = each %$v) {
383	next unless $cpath eq substr $upath, 0, length $cpath;
384
385	while (my ($k, $v) = each %$v) {
386	next if $uscheme ne "https" && exists $v->{secure};
387	my $value = $v->{value};
388	$value =~ s/([\\"])/\\$1/g;
389	push @cookie, "$k=\"$value\"";
390	}
391	}
392	}
393
394	$hdr{cookie} = join "; ", @cookie	570	$hdr{cookie} = join "; ", @$cookies
395	if @cookie;	571	if @$cookies;
396	}	572	}
397		573
398	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path	574	my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
399		575
400	if ($proxy) {	576	if ($proxy) {
401	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);	577	($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
		578
		579	$rscheme = "http" unless defined $rscheme;
402		580
403	# don't support https requests over https-proxy transport,	581	# don't support https requests over https-proxy transport,
404	# can't be done with tls as spec'ed, unless you double-encrypt.	582	# can't be done with tls as spec'ed, unless you double-encrypt.
405	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";	583	$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
406	} else {	584	} else {
407	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);	585	($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
408	}	586	}
409		587
410	$hdr{"user-agent"} \|\|= $USERAGENT;	588	# leave out fragment and query string, just a heuristic
411	$hdr{referer} \|\|= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic	589	$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer};
		590	$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"};
412		591
413	$hdr{"content-length"} = length $arg{body};	592	$hdr{"content-length"} = length $arg{body}
		593	if length $arg{body} \|\| $method ne "GET";
		594
		595	$hdr{connection} = "close TE"; #1.1
		596	$hdr{te} = "trailers" unless exists $hdr{te}; #1.1
414		597
415	my %state = (connect_guard => 1);	598	my %state = (connect_guard => 1);
416		599
417	_get_slot $uhost, sub {	600	_get_slot $uhost, sub {
418	$state{slot_guard} = shift;	601	$state{slot_guard} = shift;
419		602
420	return unless $state{connect_guard};	603	return unless $state{connect_guard};
421		604
422	$state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {	605	my $connect_cb = sub {
423	$state{fh} = shift	606	$state{fh} = shift
424	or do {	607	or do {
425	my $err = "$!";	608	my $err = "$!";
426	%state = ();	609	%state = ();
427	return $cb->(undef, { Status => 599, Reason => $err, URL => $url });	610	return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
428	};	611	};
429
430	pop; # free memory, save a tree
431		612
432	return unless delete $state{connect_guard};	613	return unless delete $state{connect_guard};
433		614
434	# get handle	615	# get handle
435	$state{handle} = new AnyEvent::Handle	616	$state{handle} = new AnyEvent::Handle
436	fh => $state{fh},	617	fh => $state{fh},
		618	peername => $rhost,
		619	tls_ctx => $arg{tls_ctx},
		620	# these need to be reconfigured on keepalive handles
437	timeout => $timeout,	621	timeout => $timeout,
438	peername => $rhost,	622	on_error => sub {
439	tls_ctx => $arg{tls_ctx};	623	%state = ();
		624	$cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
		625	},
		626	on_eof => sub {
		627	%state = ();
		628	$cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
		629	},
		630	;
440		631
441	# limit the number of persistent connections	632	# limit the number of persistent connections
442	# keepalive not yet supported	633	# keepalive not yet supported
443	if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {	634	# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
444	++$KA_COUNT{$_[1]};	635	# ++$KA_COUNT{$_[1]};
445	$state{handle}{ka_count_guard} = AnyEvent::Util::guard {	636	# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
446	--$KA_COUNT{$_[1]}	637	# --$KA_COUNT{$_[1]}
447	};	638	# };
448	$hdr{connection} = "keep-alive";	639	# $hdr{connection} = "keep-alive";
449	} else {
450	delete $hdr{connection};
451	}	640	# }
452
453	# (re-)configure handle
454	$state{handle}->on_error (sub {
455	%state = ();
456	$cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
457	});
458	$state{handle}->on_eof (sub {
459	%state = ();
460	$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
461	});
462		641
463	$state{handle}->starttls ("connect") if $rscheme eq "https";	642	$state{handle}->starttls ("connect") if $rscheme eq "https";
464		643
465	# handle actual, non-tunneled, request	644	# handle actual, non-tunneled, request
466	my $handle_actual_request = sub {	645	my $handle_actual_request = sub {
467	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};	646	$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
468		647
469	# send request	648	# send request
470	$state{handle}->push_write (	649	$state{handle}->push_write (
471	"$method $rpath HTTP/1.0\015\012"	650	"$method $rpath HTTP/1.1\015\012"
472	. (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)	651	. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
473	. "\015\012"	652	. "\015\012"
474	. (delete $arg{body})	653	. (delete $arg{body})
475	);	654	);
476		655
		656	# return if error occured during push_write()
		657	return unless %state;
		658
477	%hdr = (); # reduce memory usage, save a kitten	659	%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
478		660
479	# status line	661	# status line and headers
480	$state{handle}->push_read (line => $qr_nl, sub {	662	$state{read_response} = sub {
481	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
482	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
483
484	my %hdr = ( # response headers
485	HTTPVersion => ",$1",
486	Status => ",$2",
487	Reason => ",$3",
488	URL => ",$url"
489	);
490
491	# headers, could be optimized a bit
492	$state{handle}->unshift_read (line => $qr_nlnl, sub {
493	for ("$_[1]\012") {	663	for ("$_[1]") {
494	y/\015//d; # weed out any \015, as they show up in the weirdest of places.	664	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
495		665
496	# things seen, not parsed:	666	/^HTTP\/0([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]) )? \012/gxci
497	# p3pP="NON CUR OTPi OUR NOR UNI"	667	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
498		668
499	$hdr{lc $1} .= ",$2"	669	# 100 Continue handling
500	while /\G	670	# should not happen as we don't send expect: 100-continue,
501	([^:\000-\037]*):	671	# but we handle it just in case.
502	[\011\040]*	672	# since we send the request body regardless, if we get an error
503	((?: [^\012]+ \| \012[\011\040] )*)	673	# we are out of-sync, which we currently do NOT handle correctly.
504	\012	674	return $state{handle}->push_read (line => $qr_nlnl, $state{read_response})
505	/gxc;	675	if $2 eq 100;
506		676
		677	push @pseudo,
		678	HTTPVersion => $1,
		679	Status => $2,
		680	Reason => $3,
507	/\G$/	681	;
		682
		683	my $hdr = parse_hdr
508	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));	684	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
		685
		686	%hdr = (%$hdr, @pseudo);
		687	}
		688
		689	# redirect handling
		690	# microsoft and other shitheads don't give a shit for following standards,
		691	# try to support some common forms of broken Location headers.
		692	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {
		693	$hdr{location} =~ s/^\.\/+//;
		694
		695	my $url = "$rscheme://$uhost:$uport";
		696
		697	unless ($hdr{location} =~ s/^\///) {
		698	$url .= $upath;
		699	$url =~ s/\/[^\/]*$//;
509	}	700	}
510		701
511	substr $_, 0, 1, ""	702	$hdr{location} = "$url/$hdr{location}";
512	for values %hdr;	703	}
513		704
		705	my $redirect;
		706
		707	if ($recurse) {
		708	my $status = $hdr{Status};
		709
		710	# industry standard is to redirect POST as GET for
		711	# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1.
		712	# also, the UA should ask the user for 301 and 307 and POST,
		713	# industry standard seems to be to simply follow.
		714	# we go with the industry standard.
		715	if ($status == 301 or $status == 302 or $status == 303) {
		716	# HTTP/1.1 is unclear on how to mutate the method
		717	$method = "GET" unless $method eq "HEAD";
514	# redirect handling	718	$redirect = 1;
515	# microsoft and other shitheads don't give a shit for following standards,	719	} elsif ($status == 307) {
516	# try to support some common forms of broken Location headers.	720	$redirect = 1;
517	if ($hdr{location} !~ /^(?: $ \| [^:\/?\#]+ : )/x) {	721	}
518	$hdr{location} =~ s/^\.\/+//;	722	}
519		723
520	my $url = "$rscheme://$uhost:$uport";	724	my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
		725	my $may_keep_alive = $_[3];
521		726
522	unless ($hdr{location} =~ s/^\///) {	727	$state{handle}->destroy if $state{handle};
		728	%state = ();
		729
		730	if (defined $_[1]) {
		731	$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
		732	$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
		733	}
		734
		735	# set-cookie processing
		736	if ($arg{cookie_jar}) {
		737	cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost;
		738	}
		739
		740	if ($redirect && exists $hdr{location}) {
		741	# we ignore any errors, as it is very common to receive
		742	# Content-Length != 0 but no actual body
		743	# we also access %hdr, as $_[1] might be an erro
		744	http_request (
		745	$method => $hdr{location},
		746	%arg,
		747	recurse => $recurse - 1,
		748	Redirect => [$_[0], \%hdr],
		749	$cb);
		750	} else {
		751	$cb->($_[0], \%hdr);
		752	}
		753	};
		754
		755	my $len = $hdr{"content-length"};
		756
		757	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
		758	$finish->(undef, 598 => "Request cancelled by on_header");
		759	} elsif (
		760	$hdr{Status} =~ /^(?:1..\|204\|205\|304)$/
		761	or $method eq "HEAD"
		762	or (defined $len && !$len)
		763	) {
		764	# no body
		765	$finish->("", undef, undef, 1);
		766	} else {
		767	# body handling, many different code paths
		768	# - no body expected
		769	# - want_body_handle
		770	# - te chunked
		771	# - 2x length known (with or without on_body)
		772	# - 2x length not known (with or without on_body)
		773	if (!$redirect && $arg{want_body_handle}) {
		774	$_[0]->on_eof (undef);
		775	$_[0]->on_error (undef);
		776	$_[0]->on_read (undef);
		777
		778	$finish->(delete $state{handle});
		779
		780	} elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) {
		781	my $cl = 0;
		782	my $body = undef;
		783	my $on_body = $arg{on_body} \|\| sub { $body .= shift; 1 };
		784
		785	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		786
		787	my $read_chunk; $read_chunk = sub {
		788	$_[1] =~ /^([0-9a-fA-F]+)/
		789	or $finish->(undef, 599 => "Garbled chunked transfer encoding");
		790
		791	my $len = hex $1;
		792
		793	if ($len) {
523	$url .= $upath;	794	$cl += $len;
524	$url =~ s/\/[^\/]*$//;	795
		796	$_[0]->push_read (chunk => $len, sub {
		797	$on_body->($_[1], \%hdr)
		798	or return $finish->(undef, 598 => "Request cancelled by on_body");
		799
		800	$_[0]->push_read (line => sub {
		801	length $_[1]
		802	and return $finish->(undef, 599 => "Garbled chunked transfer encoding");
		803	$_[0]->push_read (line => $read_chunk);
		804	});
		805	});
		806	} else {
		807	$hdr{"content-length"} \|\|= $cl;
		808
		809	$_[0]->push_read (line => $qr_nlnl, sub {
		810	if (length $_[1]) {
		811	for ("$_[1]") {
		812	y/\015//d; # weed out any \015, as they show up in the weirdest of places.
		813
		814	my $hdr = parse_hdr
		815	or return $finish->(undef, 599 => "Garbled response trailers");
		816
		817	%hdr = (%hdr, %$hdr);
		818	}
		819	}
		820
		821	$finish->($body, undef, undef, 1);
		822	});
		823	}
		824	};
		825
		826	$_[0]->push_read (line => $read_chunk);
		827
		828	} elsif ($arg{on_body}) {
		829	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
		830
		831	if ($len) {
		832	$_[0]->on_read (sub {
		833	$len -= length $_[0]{rbuf};
		834
		835	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		836	or return $finish->(undef, 598 => "Request cancelled by on_body");
		837
		838	$len > 0
		839	or $finish->("", undef, undef, 1);
		840	});
		841	} else {
		842	$_[0]->on_eof (sub {
		843	$finish->("");
		844	});
		845	$_[0]->on_read (sub {
		846	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
		847	or $finish->(undef, 598 => "Request cancelled by on_body");
		848	});
525	}	849	}
526
527	$hdr{location} = "$url/$hdr{location}";
528	}	850	} else {
		851	$_[0]->on_eof (undef);
529		852
530	my $redirect;
531
532	if ($recurse) {	853	if ($len) {
533	if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {	854	$_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
534	# apparently, mozilla et al. just change POST to GET here	855	$_[0]->on_read (sub {
535	# more research is needed before we do the same	856	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
		857	if $len <= length $_[0]{rbuf};
536	$redirect = 1;	858	});
537	} elsif ($hdr{Status} == 303) {	859	} else {
538	# even http/1.1 is unclear on how to mutate the method	860	$_[0]->on_error (sub {
539	$method = "GET" unless $method eq "HEAD";	861	($! == Errno::EPIPE \|\| !$!)
		862	? $finish->(delete $_[0]{rbuf})
		863	: $finish->(undef, 599 => $_[2]);
540	$redirect = 1;	864	});
541	} elsif ($hdr{Status} == 307 && $method =~ /^(?:GET\|HEAD)$/) {	865	$_[0]->on_read (sub { });
542	$redirect = 1;
543	}	866	}
544	}	867	}
545
546	my $finish = sub {
547	$state{handle}->destroy if $state{handle};
548	%state = ();
549
550	# set-cookie processing
551	if ($arg{cookie_jar}) {
552	for ($_[1]{"set-cookie"}) {
553	# parse NAME=VALUE
554	my @kv;
555
556	while (/\G\s* ([^=;,[:space:]]+) \s=\s (?: "((?:[^\\"]+\|\\.))" \| ([^=;,[:space:]]) )/gcxs) {
557	my $name = $1;
558	my $value = $3;
559
560	unless ($value) {
561	$value = $2;
562	$value =~ s/\\(.)/$1/gs;
563	}
564
565	push @kv, $name => $value;
566
567	last unless /\G\s*;/gc;
568	}
569
570	last unless @kv;
571
572	my $name = shift @kv;
573	my %kv = (value => shift @kv, @kv);
574
575	my $cdom;
576	my $cpath = (delete $kv{path}) \|\| "/";
577
578	if (exists $kv{domain}) {
579	$cdom = delete $kv{domain};
580
581	$cdom =~ s/^\.?/./; # make sure it starts with a "."
582
583	next if $cdom =~ /\.$/;
584
585	# this is not rfc-like and not netscape-like. go figure.
586	my $ndots = $cdom =~ y/.//;
587	next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
588	} else {
589	$cdom = $uhost;
590	}
591
592	# store it
593	$arg{cookie_jar}{version} = 1;
594	$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
595
596	redo if /\G\s*,/gc;
597	}
598	}
599
600	if ($redirect) {
601	# we ignore any errors, as it is very common to receive
602	# Content-Length != 0 but no actual body
603	# we also access %hdr, as $_[1] might be an erro
604	http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
605	} else {
606	$cb->($_[0], $_[1]);
607	}
608	};
609
610	my $len = $hdr{"content-length"};
611
612	if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
613	$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
614	} elsif (
615	$hdr{Status} =~ /^(?:1..\|[23]04)$/
616	or $method eq "HEAD"
617	or (defined $len && !$len)
618	) {
619	# no body
620	$finish->("", \%hdr);
621	} else {
622	# body handling, four different code paths
623	# for want_body_handle, on_body (2x), normal (2x)
624	# we might read too much here, but it does not matter yet (no pers. connections)
625	if (!$redirect && $arg{want_body_handle}) {
626	$_[0]->on_eof (undef);
627	$_[0]->on_error (undef);
628	$_[0]->on_read (undef);
629
630	$finish->(delete $state{handle}, \%hdr);
631
632	} elsif ($arg{on_body}) {
633	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
634	if ($len) {
635	$_[0]->on_eof (undef);
636	$_[0]->on_read (sub {
637	$len -= length $_[0]{rbuf};
638
639	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
640	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
641
642	$len > 0
643	or $finish->("", \%hdr);
644	});
645	} else {
646	$_[0]->on_eof (sub {
647	$finish->("", \%hdr);
648	});
649	$_[0]->on_read (sub {
650	$arg{on_body}(delete $_[0]{rbuf}, \%hdr)
651	or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
652	});
653	}
654	} else {
655	$_[0]->on_eof (undef);
656
657	if ($len) {
658	$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
659	$_[0]->on_read (sub {
660	$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
661	if $len <= length $_[0]{rbuf};
662	});
663	} else {
664	$_[0]->on_error (sub {
665	$! == Errno::EPIPE \|\| !$!
666	? $finish->(delete $_[0]{rbuf}, \%hdr)
667	: $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
668	});
669	$_[0]->on_read (sub { });
670	}
671	}
672	}
673	});	868	}
674	});	869	};
		870
		871	$state{handle}->push_read (line => $qr_nlnl, $state{read_response});
675	};	872	};
676		873
677	# now handle proxy-CONNECT method	874	# now handle proxy-CONNECT method
678	if ($proxy && $uscheme eq "https") {	875	if ($proxy && $uscheme eq "https") {
679	# oh dear, we have to wrap it into a connect request	876	# oh dear, we have to wrap it into a connect request
680		877
681	# maybe re-use $uauthority with patched port?	878	# maybe re-use $uauthority with patched port?
682	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");	879	$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
683	$state{handle}->push_read (line => $qr_nlnl, sub {	880	$state{handle}->push_read (line => $qr_nlnl, sub {
684	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix	881	$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
685	or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));	882	or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
686		883
687	if ($2 == 200) {	884	if ($2 == 200) {
688	$rpath = $upath;	885	$rpath = $upath;
689	&$handle_actual_request;	886	&$handle_actual_request;
690	} else {	887	} else {
691	%state = ();	888	%state = ();
692	$cb->(undef, { Status => $2, Reason => $3, URL => $url });	889	$cb->(undef, { @pseudo, Status => $2, Reason => $3 });
693	}	890	}
694	});	891	});
695	} else {	892	} else {
696	&$handle_actual_request;	893	&$handle_actual_request;
697	}	894	}
698
699	}, sub {
700	$timeout
701	};	895	};
		896
		897	my $tcp_connect = $arg{tcp_connect}
		898	\|\| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
		899
		900	$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} \|\| sub { $timeout });
		901
702	};	902	};
703		903
704	defined wantarray && AnyEvent::Util::guard { %state = () }	904	defined wantarray && AnyEvent::Util::guard { %state = () }
705	}	905	}
706		906
…		…
720	&http_request	920	&http_request
721	}	921	}
722		922
723	=back	923	=back
724		924
		925	=head2 DNS CACHING
		926
		927	AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
		928	the actual connection, which in turn uses AnyEvent::DNS to resolve
		929	hostnames. The latter is a simple stub resolver and does no caching
		930	on its own. If you want DNS caching, you currently have to provide
		931	your own default resolver (by storing a suitable resolver object in
		932	C<$AnyEvent::DNS::RESOLVER>).
		933
725	=head2 GLOBAL FUNCTIONS AND VARIABLES	934	=head2 GLOBAL FUNCTIONS AND VARIABLES
726		935
727	=over 4	936	=over 4
728		937
729	=item AnyEvent::HTTP::set_proxy "proxy-url"	938	=item AnyEvent::HTTP::set_proxy "proxy-url"
730		939
731	Sets the default proxy server to use. The proxy-url must begin with a	940	Sets the default proxy server to use. The proxy-url must begin with a
732	string of the form C<http://host:port> (optionally C<https:...>).	941	string of the form C<http://host:port> (optionally C<https:...>), croaks
		942	otherwise.
		943
		944	To clear an already-set proxy, use C<undef>.
		945
		946	=item $date = AnyEvent::HTTP::format_date $timestamp
		947
		948	Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
		949	Date (RFC 2616).
		950
		951	=item $timestamp = AnyEvent::HTTP::parse_date $date
		952
		953	Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) and
		954	returns the corresponding POSIX timestamp, or C<undef> if the date cannot
		955	be parsed.
733		956
734	=item $AnyEvent::HTTP::MAX_RECURSE	957	=item $AnyEvent::HTTP::MAX_RECURSE
735		958
736	The default value for the C<recurse> request parameter (default: C<10>).	959	The default value for the C<recurse> request parameter (default: C<10>).
737		960
…		…
740	The default value for the C<User-Agent> header (the default is	963	The default value for the C<User-Agent> header (the default is
741	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).	964	C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
742		965
743	=item $AnyEvent::HTTP::MAX_PER_HOST	966	=item $AnyEvent::HTTP::MAX_PER_HOST
744		967
745	The maximum number of concurrent conenctions to the same host (identified	968	The maximum number of concurrent connections to the same host (identified
746	by the hostname). If the limit is exceeded, then the additional requests	969	by the hostname). If the limit is exceeded, then the additional requests
747	are queued until previous connections are closed.	970	are queued until previous connections are closed.
748		971
749	The default value for this is C<4>, and it is highly advisable to not	972	The default value for this is C<4>, and it is highly advisable to not
750	increase it.	973	increase it.
…		…
757		980
758	=back	981	=back
759		982
760	=cut	983	=cut
761		984
		985	our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
		986	our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
		987
		988	sub format_date($) {
		989	my ($time) = @_;
		990
		991	# RFC 822/1123 format
		992	my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
		993
		994	sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
		995	$weekday[$wday], $mday, $month[$mon], $year + 1900,
		996	$H, $M, $S;
		997	}
		998
		999	sub parse_date($) {
		1000	my ($date) = @_;
		1001
		1002	my ($d, $m, $y, $H, $M, $S);
		1003
		1004	if ($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$/) {
		1005	# RFC 822/1123, required by RFC 2616 (with " ")
		1006	# cookie dates (with "-")
		1007
		1008	($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
		1009
		1010	} elsif ($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$/) {
		1011	# RFC 850
		1012	($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
		1013
		1014	} elsif ($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])$/) {
		1015	# ISO C's asctime
		1016	($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
		1017	}
		1018	# other formats fail in the loop below
		1019
		1020	for (0..11) {
		1021	if ($m eq $month[$_]) {
		1022	require Time::Local;
		1023	return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
		1024	}
		1025	}
		1026
		1027	undef
		1028	}
		1029
762	sub set_proxy($) {	1030	sub set_proxy($) {
		1031	if (length $_[0]) {
763	$PROXY = [$2, $3 \|\| 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix;	1032	$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
		1033	or Carp::croak "$_[0]: invalid proxy URL";
		1034	$PROXY = [$2, $3 \|\| 3128, $1]
		1035	} else {
		1036	undef $PROXY;
		1037	}
764	}	1038	}
765		1039
766	# initialise proxy from environment	1040	# initialise proxy from environment
		1041	eval {
767	set_proxy $ENV{http_proxy};	1042	set_proxy $ENV{http_proxy};
		1043	};
		1044
		1045	=head2 SOCKS PROXIES
		1046
		1047	Socks proxies are not directly supported by AnyEvent::HTTP. You can
		1048	compile your perl to support socks, or use an external program such as
		1049	F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
		1050	transparently.
		1051
		1052	Alternatively, for AnyEvent::HTTP only, you can use your own
		1053	C<tcp_connect> function that does the proxy handshake - here is an example
		1054	that works with socks4a proxies:
		1055
		1056	use Errno;
		1057	use AnyEvent::Util;
		1058	use AnyEvent::Socket;
		1059	use AnyEvent::Handle;
		1060
		1061	# host, port and username of/for your socks4a proxy
		1062	my $socks_host = "10.0.0.23";
		1063	my $socks_port = 9050;
		1064	my $socks_user = "";
		1065
		1066	sub socks4a_connect {
		1067	my ($host, $port, $connect_cb, $prepare_cb) = @_;
		1068
		1069	my $hdl = new AnyEvent::Handle
		1070	connect => [$socks_host, $socks_port],
		1071	on_prepare => sub { $prepare_cb->($_[0]{fh}) },
		1072	on_error => sub { $connect_cb->() },
		1073	;
		1074
		1075	$hdl->push_write (pack "CCnNZZ", 4, 1, $port, 1, $socks_user, $host);
		1076
		1077	$hdl->push_read (chunk => 8, sub {
		1078	my ($hdl, $chunk) = @_;
		1079	my ($status, $port, $ipn) = unpack "xCna4", $chunk;
		1080
		1081	if ($status == 0x5a) {
		1082	$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
		1083	} else {
		1084	$! = Errno::ENXIO; $connect_cb->();
		1085	}
		1086	});
		1087
		1088	$hdl
		1089	}
		1090
		1091	Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
		1092	possibly after switching off other proxy types:
		1093
		1094	AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
		1095
		1096	http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
		1097	my ($data, $headers) = @_;
		1098	...
		1099	};
768		1100
769	=head1 SEE ALSO	1101	=head1 SEE ALSO
770		1102
771	L<AnyEvent>.	1103	L<AnyEvent>.
772		1104

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Comparing AnyEvent-HTTP/HTTP.pm (file contents): Revision 1.44 by root, Tue Jul 7 00:15:32 2009 UTC vs. Revision 1.76 by root, Sat Jan 1 02:20:49 2011 UTC

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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.44 by root, Tue Jul 7 00:15:32 2009 UTC vs.
Revision 1.76 by root, Sat Jan 1 02:20:49 2011 UTC