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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.50 by root, Tue Aug 11 13:20:42 2009 UTC vs.
Revision 1.65 by root, Fri Dec 31 03:47:32 2010 UTC

… …
41use strict; 41use strict;
42no warnings; 42no warnings;
43 43
44use Errno (); 44use Errno ();
45 45
46use AnyEvent 4.8 (); 46use AnyEvent 5.0 ();
47use AnyEvent::Util (); 47use AnyEvent::Util ();
48use AnyEvent::Socket ();
49use AnyEvent::Handle (); 48use AnyEvent::Handle ();
50 49
51use base Exporter::; 50use base Exporter::;
52 51
53our $VERSION = '1.42'; 52our $VERSION = '1.5';
54 53
55our @EXPORT = qw(http_get http_post http_head http_request); 54our @EXPORT = qw(http_get http_post http_head http_request);
56 55
57our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; 56our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
58our $MAX_RECURSE = 10; 57our $MAX_RECURSE = 10;
… …
92must be an absolute http or https URL. 91must be an absolute http or https URL.
93 92
94When called in void context, nothing is returned. In other contexts, 93When called in void context, nothing is returned. In other contexts,
95C<http_request> returns a "cancellation guard" - you have to keep the 94C<http_request> returns a "cancellation guard" - you have to keep the
96object at least alive until the callback get called. If the object gets 95object at least alive until the callback get called. If the object gets
97destroyed before the callbakc is called, the request will be cancelled. 96destroyed before the callback is called, the request will be cancelled.
98 97
99The callback will be called with the response body data as first argument 98The 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
101second argument. 100second argument.
102 101
103All the headers in that hash are lowercased. In addition to the response 102All the headers in that hash are lowercased. In addition to the response
104headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason> 103headers, the "pseudo-headers" (uppercase to avoid clashing with possible
104response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
105contain the three parts of the HTTP Status-Line of the same name. The 105three parts of the HTTP Status-Line of the same name. If an error occurs
106during the body phase of a request, then the original C<Status> and
107C<Reason> values from the header are available as C<OrigStatus> and
108C<OrigReason>.
109
106pseudo-header C<URL> contains the original URL (which can differ from the 110The pseudo-header C<URL> contains the actual URL (which can differ from
107requested URL when following redirects). 111the requested URL when following redirects - for example, you might get
112an error that your URL scheme is not supported even though your URL is a
113valid http URL because it redirected to an ftp URL, in which case you can
114look at the URL pseudo header).
115
116The pseudo-header C<Redirect> only exists when the request was a result
117of an internal redirect. In that case it is an array reference with
118the C<($data, $headers)> from the redirect response. Note that this
119response could in turn be the result of a redirect itself, and C<<
120$headers->{Redirect}[1]{Redirect} >> will then contain the original
121response, and so on.
108 122
109If the server sends a header multiple times, then their contents will be 123If the server sends a header multiple times, then their contents will be
110joined together with a comma (C<,>), as per the HTTP spec. 124joined together with a comma (C<,>), as per the HTTP spec.
111 125
112If an internal error occurs, such as not being able to resolve a hostname, 126If an internal error occurs, such as not being able to resolve a hostname,
… …
145sent at all). 159sent at all).
146 160
147=item timeout => $seconds 161=item timeout => $seconds
148 162
149The time-out to use for various stages - each connect attempt will reset 163The time-out to use for various stages - each connect attempt will reset
150the timeout, as will read or write activity. Default timeout is 5 minutes. 164the timeout, as will read or write activity, i.e. this is not an overall
165timeout.
166
167Default timeout is 5 minutes.
151 168
152=item proxy => [$host, $port[, $scheme]] or undef 169=item proxy => [$host, $port[, $scheme]] or undef
153 170
154Use the given http proxy for all requests. If not specified, then the 171Use the given http proxy for all requests. If not specified, then the
155default proxy (as specified by C<$ENV{http_proxy}>) is used. 172default proxy (as specified by C<$ENV{http_proxy}>) is used.
… …
187verification, highest compatibility) and high-security (CA and common-name 204verification, highest compatibility) and high-security (CA and common-name
188verification) TLS context. 205verification) TLS context.
189 206
190The default for this option is C<low>, which could be interpreted as "give 207The default for this option is C<low>, which could be interpreted as "give
191me the page, no matter what". 208me the page, no matter what".
209
210=item on_prepare => $callback->($fh)
211
212In rare cases you need to "tune" the socket before it is used to
213connect (for exmaple, to bind it on a given IP address). This parameter
214overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
215and behaves exactly the same way (e.g. it has to provide a
216timeout). See the description for the C<$prepare_cb> argument of
217C<AnyEvent::Socket::tcp_connect> for details.
218
219=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
220
221In even rarer cases you want total control over how AnyEvent::HTTP
222establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
223to do this, but you can provide your own C<tcp_connect> function -
224obviously, it has to follow the same calling conventions, except that it
225may always return a connection guard object.
226
227There are probably lots of weird uses for this function, starting from
228tracing the hosts C<http_request> actually tries to connect, to (inexact
229but fast) host => IP address caching or even socks protocol support.
192 230
193=item on_header => $callback->($headers) 231=item on_header => $callback->($headers)
194 232
195When specified, this callback will be called with the header hash as soon 233When specified, this callback will be called with the header hash as soon
196as headers have been successfully received from the remote server (not on 234as headers have been successfully received from the remote server (not on
… …
314 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 352 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
315 353
316 _slot_schedule $_[0]; 354 _slot_schedule $_[0];
317} 355}
318 356
319our $qr_nl = qr{\015?\012};
320our $qr_nlnl = qr{(?<![^\012])\015?\012}; 357our $qr_nlnl = qr{(?<![^\012])\015?\012};
321 358
322our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; 359our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
323our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; 360our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
324 361
… …
337 while (my ($k, $v) = each %$hdr) { 374 while (my ($k, $v) = each %$hdr) {
338 $hdr{lc $k} = $v; 375 $hdr{lc $k} = $v;
339 } 376 }
340 } 377 }
341 378
379 # pseudo headers for all subsequent responses
380 my @pseudo = (URL => $url);
381 push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
382
342 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 383 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
343 384
344 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) 385 return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
345 if $recurse < 0; 386 if $recurse < 0;
346 387
347 my $proxy = $arg{proxy} || $PROXY; 388 my $proxy = $arg{proxy} || $PROXY;
348 my $timeout = $arg{timeout} || $TIMEOUT; 389 my $timeout = $arg{timeout} || $TIMEOUT;
349 390
350 my ($uscheme, $uauthority, $upath, $query, $fragment) = 391 my ($uscheme, $uauthority, $upath, $query, $fragment) =
351 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 392 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
352 393
353 $uscheme = lc $uscheme; 394 $uscheme = lc $uscheme;
354 395
355 my $uport = $uscheme eq "http" ? 80 396 my $uport = $uscheme eq "http" ? 80
356 : $uscheme eq "https" ? 443 397 : $uscheme eq "https" ? 443
357 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url }); 398 : return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" });
358 399
359 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 400 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
360 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); 401 or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
361 402
362 my $uhost = $1; 403 my $uhost = $1;
363 $uport = $2 if defined $2; 404 $uport = $2 if defined $2;
364 405
365 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"; 406 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
407 unless exists $hdr{host};
366 408
367 $uhost =~ s/^\[(.*)\]$/$1/; 409 $uhost =~ s/^\[(.*)\]$/$1/;
368 $upath .= "?$query" if length $query; 410 $upath .= $query if length $query;
369 411
370 $upath =~ s%^/?%/%; 412 $upath =~ s%^/?%/%;
371 413
372 # cookie processing 414 # cookie processing
373 if (my $jar = $arg{cookie_jar}) { 415 if (my $jar = $arg{cookie_jar}) {
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416 458
417 # leave out fragment and query string, just a heuristic 459 # leave out fragment and query string, just a heuristic
418 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer}; 460 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
419 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"}; 461 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};
420 462
421 $hdr{"content-length"} = length $arg{body}; 463 $hdr{"content-length"} = length $arg{body}
464 if length $arg{body} || $method ne "GET";
422 465
423 my %state = (connect_guard => 1); 466 my %state = (connect_guard => 1);
424 467
425 _get_slot $uhost, sub { 468 _get_slot $uhost, sub {
426 $state{slot_guard} = shift; 469 $state{slot_guard} = shift;
427 470
428 return unless $state{connect_guard}; 471 return unless $state{connect_guard};
429 472
430 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 473 my $connect_cb = sub {
431 $state{fh} = shift 474 $state{fh} = shift
432 or do { 475 or do {
433 my $err = "$!"; 476 my $err = "$!";
434 %state = (); 477 %state = ();
435 return $cb->(undef, { Status => 599, Reason => $err, URL => $url }); 478 return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
436 }; 479 };
437 480
438 pop; # free memory, save a tree 481 pop; # free memory, save a tree
439 482
440 return unless delete $state{connect_guard}; 483 return unless delete $state{connect_guard};
441 484
442 # get handle 485 # get handle
443 $state{handle} = new AnyEvent::Handle 486 $state{handle} = new AnyEvent::Handle
444 fh => $state{fh}, 487 fh => $state{fh},
488 peername => $rhost,
489 tls_ctx => $arg{tls_ctx},
490 # these need to be reconfigured on keepalive handles
445 timeout => $timeout, 491 timeout => $timeout,
446 peername => $rhost, 492 on_error => sub {
447 tls_ctx => $arg{tls_ctx}; 493 %state = ();
494 $cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
495 },
496 on_eof => sub {
497 %state = ();
498 $cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
499 },
500 ;
448 501
449 # limit the number of persistent connections 502 # limit the number of persistent connections
450 # keepalive not yet supported 503 # keepalive not yet supported
451 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 504# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
452 ++$KA_COUNT{$_[1]}; 505# ++$KA_COUNT{$_[1]};
453 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 506# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
454 --$KA_COUNT{$_[1]} 507# --$KA_COUNT{$_[1]}
455 }; 508# };
456 $hdr{connection} = "keep-alive"; 509# $hdr{connection} = "keep-alive";
457 } else { 510# } else {
458 delete $hdr{connection}; 511 delete $hdr{connection};
459 } 512# }
460
461 # (re-)configure handle
462 $state{handle}->on_error (sub {
463 %state = ();
464 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
465 });
466 $state{handle}->on_eof (sub {
467 %state = ();
468 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
469 });
470 513
471 $state{handle}->starttls ("connect") if $rscheme eq "https"; 514 $state{handle}->starttls ("connect") if $rscheme eq "https";
472 515
473 # handle actual, non-tunneled, request 516 # handle actual, non-tunneled, request
474 my $handle_actual_request = sub { 517 my $handle_actual_request = sub {
… …
480 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) 523 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
481 . "\015\012" 524 . "\015\012"
482 . (delete $arg{body}) 525 . (delete $arg{body})
483 ); 526 );
484 527
528 # return if error occured during push_write()
529 return unless %state;
530
485 %hdr = (); # reduce memory usage, save a kitten 531 %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
486 532
487 # status line 533 # status line and headers
488 $state{handle}->push_read (line => $qr_nl, sub { 534 $state{handle}->push_read (line => $qr_nlnl, sub {
489 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 535 my $keepalive = pop;
490 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
491 536
492 my %hdr = ( # response headers
493 HTTPVersion => ",$1",
494 Status => ",$2",
495 Reason => ",$3",
496 URL => ",$url"
497 );
498
499 # headers, could be optimized a bit
500 $state{handle}->unshift_read (line => $qr_nlnl, sub {
501 for ("$_[1]") { 537 for ("$_[1]") {
502 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 538 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
503 539
540 /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc
541 or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" }));
542
543 push @pseudo,
544 HTTPVersion => $1,
545 Status => $2,
546 Reason => $3,
547 ;
548
504 # things seen, not parsed: 549 # things seen, not parsed:
505 # p3pP="NON CUR OTPi OUR NOR UNI" 550 # p3pP="NON CUR OTPi OUR NOR UNI"
506 551
507 $hdr{lc $1} .= ",$2" 552 $hdr{lc $1} .= ",$2"
508 while /\G 553 while /\G
509 ([^:\000-\037]*): 554 ([^:\000-\037]*):
510 [\011\040]* 555 [\011\040]*
511 ((?: [^\012]+ | \012[\011\040] )*) 556 ((?: [^\012]+ | \012[\011\040] )*)
512 \012 557 \012
513 /gxc; 558 /gxc;
514 559
515 /\G$/ 560 /\G$/
516 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url })); 561 or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" }));
562 }
563
564 # remove the "," prefix we added to all headers above
565 substr $_, 0, 1, ""
566 for values %hdr;
567
568 # patch in all pseudo headers
569 %hdr = (%hdr, @pseudo);
570
571 # redirect handling
572 # microsoft and other shitheads don't give a shit for following standards,
573 # try to support some common forms of broken Location headers.
574 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
575 $hdr{location} =~ s/^\.\/+//;
576
577 my $url = "$rscheme://$uhost:$uport";
578
579 unless ($hdr{location} =~ s/^\///) {
580 $url .= $upath;
581 $url =~ s/\/[^\/]*$//;
517 } 582 }
518 583
519 substr $_, 0, 1, ""
520 for values %hdr;
521
522 # redirect handling
523 # microsoft and other shitheads don't give a shit for following standards,
524 # try to support some common forms of broken Location headers.
525 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
526 $hdr{location} =~ s/^\.\/+//;
527
528 my $url = "$rscheme://$uhost:$uport";
529
530 unless ($hdr{location} =~ s/^\///) {
531 $url .= $upath;
532 $url =~ s/\/[^\/]*$//;
533 }
534
535 $hdr{location} = "$url/$hdr{location}"; 584 $hdr{location} = "$url/$hdr{location}";
585 }
586
587 my $redirect;
588
589 if ($recurse) {
590 my $status = $hdr{Status};
591
592 # industry standard is to redirect POST as GET for
593 # 301, 302 and 303, in contrast to http/1.0 and 1.1.
594 # also, the UA should ask the user for 301 and 307 and POST,
595 # industry standard seems to be to simply follow.
596 # we go with the industry standard.
597 if ($status == 301 or $status == 302 or $status == 303) {
598 # HTTP/1.1 is unclear on how to mutate the method
599 $method = "GET" unless $method eq "HEAD";
600 $redirect = 1;
601 } elsif ($status == 307) {
602 $redirect = 1;
536 } 603 }
604 }
537 605
538 my $redirect; 606 my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
607 $state{handle}->destroy if $state{handle};
608 %state = ();
539 609
610 if (defined $_[1]) {
611 $hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
612 $hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
613 }
614
615 # set-cookie processing
540 if ($recurse) { 616 if ($arg{cookie_jar}) {
541 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 617 for ($hdr{"set-cookie"}) {
542 # apparently, mozilla et al. just change POST to GET here 618 # parse NAME=VALUE
543 # more research is needed before we do the same 619 my @kv;
620
621 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
544 $redirect = 1; 622 my $name = $1;
545 } elsif ($hdr{Status} == 303) { 623 my $value = $3;
546 # even http/1.1 is unclear on how to mutate the method 624
547 $method = "GET" unless $method eq "HEAD"; 625 unless ($value) {
626 $value = $2;
627 $value =~ s/\\(.)/$1/gs;
628 }
629
630 push @kv, $name => $value;
631
632 last unless /\G\s*;/gc;
633 }
634
635 last unless @kv;
636
637 my $name = shift @kv;
638 my %kv = (value => shift @kv, @kv);
639
640 my $cdom;
641 my $cpath = (delete $kv{path}) || "/";
642
643 if (exists $kv{domain}) {
644 $cdom = delete $kv{domain};
645
646 $cdom =~ s/^\.?/./; # make sure it starts with a "."
647
648 next if $cdom =~ /\.$/;
649
650 # this is not rfc-like and not netscape-like. go figure.
651 my $ndots = $cdom =~ y/.//;
652 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
653 } else {
654 $cdom = $uhost;
655 }
656
548 $redirect = 1; 657 # store it
549 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 658 $arg{cookie_jar}{version} = 1;
550 $redirect = 1; 659 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
660
661 redo if /\G\s*,/gc;
551 } 662 }
552 } 663 }
553 664
554 my $finish = sub { 665 if ($redirect && exists $hdr{location}) {
555 $state{handle}->destroy if $state{handle}; 666 # we ignore any errors, as it is very common to receive
556 %state = (); 667 # Content-Length != 0 but no actual body
557 668 # we also access %hdr, as $_[1] might be an erro
558 # set-cookie processing 669 http_request (
559 if ($arg{cookie_jar}) { 670 $method => $hdr{location},
560 for ($_[1]{"set-cookie"}) {
561 # parse NAME=VALUE
562 my @kv;
563
564 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
565 my $name = $1;
566 my $value = $3;
567
568 unless ($value) {
569 $value = $2;
570 $value =~ s/\\(.)/$1/gs;
571 } 671 %arg,
672 recurse => $recurse - 1,
673 Redirect => [$_[0], \%hdr],
674 $cb);
675 } else {
676 $cb->($_[0], \%hdr);
677 }
678 };
572 679
573 push @kv, $name => $value; 680 my $len = $hdr{"content-length"};
574 681
575 last unless /\G\s*;/gc; 682 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
683 $finish->(undef, 598 => "Request cancelled by on_header");
684 } elsif (
685 $hdr{Status} =~ /^(?:1..|204|205|304)$/
686 or $method eq "HEAD"
687 or (defined $len && !$len)
688 ) {
689 # no body
690 $finish->("", undef, undef, 1);
691 } else {
692 # body handling, four different code paths
693 # for want_body_handle, on_body (2x), normal (2x)
694 # we might read too much here, but it does not matter yet (no pipelining)
695 if (!$redirect && $arg{want_body_handle}) {
696 $_[0]->on_eof (undef);
697 $_[0]->on_error (undef);
698 $_[0]->on_read (undef);
699
700 $finish->(delete $state{handle});
701
702 } elsif ($arg{on_body}) {
703 $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
704 if ($len) {
705 $_[0]->on_read (sub {
706 $len -= length $_[0]{rbuf};
707
708 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
709 or $finish->(undef, 598 => "Request cancelled by on_body");
710
576 } 711 $len > 0
577 712 or $finish->("", undef, undef, 1);
578 last unless @kv;
579
580 my $name = shift @kv;
581 my %kv = (value => shift @kv, @kv);
582
583 my $cdom;
584 my $cpath = (delete $kv{path}) || "/";
585
586 if (exists $kv{domain}) {
587 $cdom = delete $kv{domain};
588
589 $cdom =~ s/^\.?/./; # make sure it starts with a "."
590
591 next if $cdom =~ /\.$/;
592
593 # this is not rfc-like and not netscape-like. go figure.
594 my $ndots = $cdom =~ y/.//;
595 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
596 } else {
597 $cdom = $uhost;
598 }
599
600 # store it
601 $arg{cookie_jar}{version} = 1;
602 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
603
604 redo if /\G\s*,/gc;
605 } 713 });
714 } else {
715 $_[0]->on_eof (sub {
716 $finish->("");
717 });
718 $_[0]->on_read (sub {
719 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
720 or $finish->(undef, 598 => "Request cancelled by on_body");
721 });
606 } 722 }
723 } else {
724 $_[0]->on_eof (undef);
607 725
608 if ($redirect && exists $hdr{location}) { 726 if ($len) {
609 # we ignore any errors, as it is very common to receive 727 $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
610 # Content-Length != 0 but no actual body 728 $_[0]->on_read (sub {
611 # we also access %hdr, as $_[1] might be an erro 729 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
612 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); 730 if $len <= length $_[0]{rbuf};
731 });
613 } else { 732 } else {
614 $cb->($_[0], $_[1]);
615 }
616 };
617
618 my $len = $hdr{"content-length"};
619
620 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
621 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
622 } elsif (
623 $hdr{Status} =~ /^(?:1..|[23]04)$/
624 or $method eq "HEAD"
625 or (defined $len && !$len)
626 ) {
627 # no body
628 $finish->("", \%hdr);
629 } else {
630 # body handling, four different code paths
631 # for want_body_handle, on_body (2x), normal (2x)
632 # we might read too much here, but it does not matter yet (no pers. connections)
633 if (!$redirect && $arg{want_body_handle}) {
634 $_[0]->on_eof (undef);
635 $_[0]->on_error (undef);
636 $_[0]->on_read (undef);
637
638 $finish->(delete $state{handle}, \%hdr);
639
640 } elsif ($arg{on_body}) {
641 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
642 if ($len) {
643 $_[0]->on_eof (undef);
644 $_[0]->on_read (sub {
645 $len -= length $_[0]{rbuf};
646
647 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
648 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
649
650 $len > 0
651 or $finish->("", \%hdr);
652 });
653 } else {
654 $_[0]->on_eof (sub {
655 $finish->("", \%hdr);
656 });
657 $_[0]->on_read (sub {
658 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
659 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
660 });
661 }
662 } else {
663 $_[0]->on_eof (undef);
664
665 if ($len) {
666 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
667 $_[0]->on_read (sub {
668 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
669 if $len <= length $_[0]{rbuf};
670 });
671 } else {
672 $_[0]->on_error (sub { 733 $_[0]->on_error (sub {
673 $! == Errno::EPIPE || !$! 734 ($! == Errno::EPIPE || !$!)
674 ? $finish->(delete $_[0]{rbuf}, \%hdr) 735 ? $finish->(delete $_[0]{rbuf})
675 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 736 : $finish->(undef, 599 => $_[2]);
676 }); 737 });
677 $_[0]->on_read (sub { }); 738 $_[0]->on_read (sub { });
678 }
679 } 739 }
680 } 740 }
681 }); 741 }
682 }); 742 });
683 }; 743 };
684 744
685 # now handle proxy-CONNECT method 745 # now handle proxy-CONNECT method
686 if ($proxy && $uscheme eq "https") { 746 if ($proxy && $uscheme eq "https") {
… …
688 748
689 # maybe re-use $uauthority with patched port? 749 # maybe re-use $uauthority with patched port?
690 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); 750 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
691 $state{handle}->push_read (line => $qr_nlnl, sub { 751 $state{handle}->push_read (line => $qr_nlnl, sub {
692 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 752 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
693 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url })); 753 or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }));
694 754
695 if ($2 == 200) { 755 if ($2 == 200) {
696 $rpath = $upath; 756 $rpath = $upath;
697 &$handle_actual_request; 757 &$handle_actual_request;
698 } else { 758 } else {
699 %state = (); 759 %state = ();
700 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 760 $cb->(undef, { @pseudo, Status => $2, Reason => $3 });
701 } 761 }
702 }); 762 });
703 } else { 763 } else {
704 &$handle_actual_request; 764 &$handle_actual_request;
705 } 765 }
766 };
706 767
707 }, $arg{on_prepare} || sub { $timeout }; 768 my $tcp_connect = $arg{tcp_connect}
769 || do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
770
771 $state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout });
772
708 }; 773 };
709 774
710 defined wantarray && AnyEvent::Util::guard { %state = () } 775 defined wantarray && AnyEvent::Util::guard { %state = () }
711} 776}
712 777
… …
726 &http_request 791 &http_request
727} 792}
728 793
729=back 794=back
730 795
796=head2 DNS CACHING
797
798AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
799the actual connection, which in turn uses AnyEvent::DNS to resolve
800hostnames. The latter is a simple stub resolver and does no caching
801on its own. If you want DNS caching, you currently have to provide
802your own default resolver (by storing a suitable resolver object in
803C<$AnyEvent::DNS::RESOLVER>).
804
731=head2 GLOBAL FUNCTIONS AND VARIABLES 805=head2 GLOBAL FUNCTIONS AND VARIABLES
732 806
733=over 4 807=over 4
734 808
735=item AnyEvent::HTTP::set_proxy "proxy-url" 809=item AnyEvent::HTTP::set_proxy "proxy-url"
736 810
737Sets the default proxy server to use. The proxy-url must begin with a 811Sets the default proxy server to use. The proxy-url must begin with a
738string of the form C<http://host:port> (optionally C<https:...>). 812string of the form C<http://host:port> (optionally C<https:...>), croaks
813otherwise.
814
815To clear an already-set proxy, use C<undef>.
816
817=item $date = AnyEvent::HTTP::format_date $timestamp
818
819Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
820Date (RFC 2616).
821
822=item $timestamp = AnyEvent::HTTP::parse_date $date
823
824Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX
825timestamp, or C<undef> if the date cannot be parsed.
739 826
740=item $AnyEvent::HTTP::MAX_RECURSE 827=item $AnyEvent::HTTP::MAX_RECURSE
741 828
742The default value for the C<recurse> request parameter (default: C<10>). 829The default value for the C<recurse> request parameter (default: C<10>).
743 830
… …
763 850
764=back 851=back
765 852
766=cut 853=cut
767 854
855our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
856our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
857
858sub format_date($) {
859 my ($time) = @_;
860
861 # RFC 822/1123 format
862 my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
863
864 sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
865 $weekday[$wday], $mday, $month[$mon], $year + 1900,
866 $H, $M, $S;
867}
868
869sub parse_date($) {
870 my ($date) = @_;
871
872 my ($d, $m, $y, $H, $M, $S);
873
874 if ($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$/) {
875 # RFC 822/1123, required by RFC 2616
876 ($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
877
878 } elsif ($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$/) {
879 # RFC 850
880 ($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
881
882 } elsif ($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])$/) {
883 # ISO C's asctime
884 ($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
885 }
886 # other formats fail in the loop below
887
888 for (0..11) {
889 if ($m eq $month[$_]) {
890 require Time::Local;
891 return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
892 }
893 }
894
895 undef
896}
897
768sub set_proxy($) { 898sub set_proxy($) {
899 if (length $_[0]) {
769 $PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix; 900 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
901 or Carp::croak "$_[0]: invalid proxy URL";
902 $PROXY = [$2, $3 || 3128, $1]
903 } else {
904 undef $PROXY;
905 }
770} 906}
771 907
772# initialise proxy from environment 908# initialise proxy from environment
909eval {
773set_proxy $ENV{http_proxy}; 910 set_proxy $ENV{http_proxy};
911};
912
913=head2 SOCKS PROXIES
914
915Socks proxies are not directly supported by AnyEvent::HTTP. You can
916compile your perl to support socks, or use an external program such as
917F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
918transparently.
919
920Alternatively, for AnyEvent::HTTP only, you can use your own
921C<tcp_connect> function that does the proxy handshake - here is an example
922that works with socks4a proxies:
923
924 use Errno;
925 use AnyEvent::Util;
926 use AnyEvent::Socket;
927 use AnyEvent::Handle;
928
929 # host, port and username of/for your socks4a proxy
930 my $socks_host = "10.0.0.23";
931 my $socks_port = 9050;
932 my $socks_user = "";
933
934 sub socks4a_connect {
935 my ($host, $port, $connect_cb, $prepare_cb) = @_;
936
937 my $hdl = new AnyEvent::Handle
938 connect => [$socks_host, $socks_port],
939 on_prepare => sub { $prepare_cb->($_[0]{fh}) },
940 on_error => sub { $connect_cb->() },
941 ;
942
943 $hdl->push_write (pack "CCnNZ*Z*", 4, 1, $port, 1, $socks_user, $host);
944
945 $hdl->push_read (chunk => 8, sub {
946 my ($hdl, $chunk) = @_;
947 my ($status, $port, $ipn) = unpack "xCna4", $chunk;
948
949 if ($status == 0x5a) {
950 $connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
951 } else {
952 $! = Errno::ENXIO; $connect_cb->();
953 }
954 });
955
956 $hdl
957 }
958
959Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
960possibly after switching off other proxy types:
961
962 AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
963
964 http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
965 my ($data, $headers) = @_;
966 ...
967 };
774 968
775=head1 SEE ALSO 969=head1 SEE ALSO
776 970
777L<AnyEvent>. 971L<AnyEvent>.
778 972

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