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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.54 by root, Wed Jun 16 18:09:52 2010 UTC vs.
Revision 1.61 by root, Thu Dec 30 03:45:01 2010 UTC

… …
43 43
44use Errno (); 44use Errno ();
45 45
46use AnyEvent 5.0 (); 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 = '1.44'; 52our $VERSION = '1.46';
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.
106
106pseudo-header C<URL> contains the original URL (which can differ from the 107The pseudo-header C<URL> contains the actual URL (which can differ from
107requested URL when following redirects). 108the requested URL when following redirects - for example, you might get
109an error that your URL scheme is not supported even though your URL is a
110valid http URL because it redirected to an ftp URL, in which case you can
111look at the URL pseudo header).
112
113The pseudo-header C<Redirect> only exists when the request was a result
114of an internal redirect. In that case it is an array reference with
115the C<($data, $headers)> from the redirect response. Note that this
116response could in turn be the result of a redirect itself, and C<<
117$headers->{Redirect}[1]{Redirect} >> will then contain the original
118response, and so on.
108 119
109If the server sends a header multiple times, then their contents will be 120If the server sends a header multiple times, then their contents will be
110joined together with a comma (C<,>), as per the HTTP spec. 121joined together with a comma (C<,>), as per the HTTP spec.
111 122
112If an internal error occurs, such as not being able to resolve a hostname, 123If an internal error occurs, such as not being able to resolve a hostname,
… …
199connect (for exmaple, to bind it on a given IP address). This parameter 210connect (for exmaple, to bind it on a given IP address). This parameter
200overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> 211overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
201and behaves exactly the same way (e.g. it has to provide a 212and behaves exactly the same way (e.g. it has to provide a
202timeout). See the description for the C<$prepare_cb> argument of 213timeout). See the description for the C<$prepare_cb> argument of
203C<AnyEvent::Socket::tcp_connect> for details. 214C<AnyEvent::Socket::tcp_connect> for details.
215
216=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
217
218In even rarer cases you want total control over how AnyEvent::HTTP
219establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
220to do this, but you can provide your own C<tcp_connect> function -
221obviously, it has to follow the same calling conventions, except that it
222may always return a connection guard object.
223
224There are probably lots of weird uses for this function, starting from
225tracing the hosts C<http_request> actually tries to connect, to (inexact
226but fast) host => IP address caching or even socks protocol support.
204 227
205=item on_header => $callback->($headers) 228=item on_header => $callback->($headers)
206 229
207When specified, this callback will be called with the header hash as soon 230When specified, this callback will be called with the header hash as soon
208as headers have been successfully received from the remote server (not on 231as headers have been successfully received from the remote server (not on
… …
326 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 349 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
327 350
328 _slot_schedule $_[0]; 351 _slot_schedule $_[0];
329} 352}
330 353
331our $qr_nl = qr{\015?\012};
332our $qr_nlnl = qr{(?<![^\012])\015?\012}; 354our $qr_nlnl = qr{(?<![^\012])\015?\012};
333 355
334our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; 356our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
335our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; 357our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
336 358
… …
349 while (my ($k, $v) = each %$hdr) { 371 while (my ($k, $v) = each %$hdr) {
350 $hdr{lc $k} = $v; 372 $hdr{lc $k} = $v;
351 } 373 }
352 } 374 }
353 375
376 # pseudo headers for all subsequent responses
377 my @pseudo = (URL => $url);
378 push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
379
354 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 380 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
355 381
356 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) 382 return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })
357 if $recurse < 0; 383 if $recurse < 0;
358 384
359 my $proxy = $arg{proxy} || $PROXY; 385 my $proxy = $arg{proxy} || $PROXY;
360 my $timeout = $arg{timeout} || $TIMEOUT; 386 my $timeout = $arg{timeout} || $TIMEOUT;
361 387
362 my ($uscheme, $uauthority, $upath, $query, $fragment) = 388 my ($uscheme, $uauthority, $upath, $query, $fragment) =
363 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 389 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
364 390
365 $uscheme = lc $uscheme; 391 $uscheme = lc $uscheme;
366 392
367 my $uport = $uscheme eq "http" ? 80 393 my $uport = $uscheme eq "http" ? 80
368 : $uscheme eq "https" ? 443 394 : $uscheme eq "https" ? 443
369 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url }); 395 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", @pseudo });
370 396
371 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 397 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
372 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); 398 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });
373 399
374 my $uhost = $1; 400 my $uhost = $1;
375 $uport = $2 if defined $2; 401 $uport = $2 if defined $2;
376 402
377 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" 403 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
378 unless exists $hdr{host}; 404 unless exists $hdr{host};
379 405
380 $uhost =~ s/^\[(.*)\]$/$1/; 406 $uhost =~ s/^\[(.*)\]$/$1/;
381 $upath .= "?$query" if length $query; 407 $upath .= $query if length $query;
382 408
383 $upath =~ s%^/?%/%; 409 $upath =~ s%^/?%/%;
384 410
385 # cookie processing 411 # cookie processing
386 if (my $jar = $arg{cookie_jar}) { 412 if (my $jar = $arg{cookie_jar}) {
… …
439 _get_slot $uhost, sub { 465 _get_slot $uhost, sub {
440 $state{slot_guard} = shift; 466 $state{slot_guard} = shift;
441 467
442 return unless $state{connect_guard}; 468 return unless $state{connect_guard};
443 469
444 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 470 my $tcp_connect = $arg{tcp_connect}
471 || do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
472
473 $state{connect_guard} = $tcp_connect->(
474 $rhost,
475 $rport,
476 sub {
445 $state{fh} = shift 477 $state{fh} = shift
446 or do { 478 or do {
447 my $err = "$!"; 479 my $err = "$!";
448 %state = (); 480 %state = ();
449 return $cb->(undef, { Status => 599, Reason => $err, URL => $url }); 481 return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
450 }; 482 };
451 483
452 pop; # free memory, save a tree 484 pop; # free memory, save a tree
453 485
454 return unless delete $state{connect_guard}; 486 return unless delete $state{connect_guard};
455 487
456 # get handle 488 # get handle
457 $state{handle} = new AnyEvent::Handle 489 $state{handle} = new AnyEvent::Handle
458 fh => $state{fh}, 490 fh => $state{fh},
491 peername => $rhost,
492 tls_ctx => $arg{tls_ctx},
493 # these need to be reconfigured on keepalive handles
459 timeout => $timeout, 494 timeout => $timeout,
460 peername => $rhost, 495 on_error => sub {
461 tls_ctx => $arg{tls_ctx}; 496 %state = ();
497 $cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
498 },
499 on_eof => sub {
500 %state = ();
501 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
502 },
503 ;
462 504
463 # limit the number of persistent connections 505 # limit the number of persistent connections
464 # keepalive not yet supported 506 # keepalive not yet supported
465 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 507# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
466 ++$KA_COUNT{$_[1]}; 508# ++$KA_COUNT{$_[1]};
467 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 509# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
468 --$KA_COUNT{$_[1]} 510# --$KA_COUNT{$_[1]}
469 }; 511# };
470 $hdr{connection} = "keep-alive"; 512# $hdr{connection} = "keep-alive";
471 } else { 513# } else {
472 delete $hdr{connection}; 514 delete $hdr{connection};
473 } 515# }
474 516
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
485 $state{handle}->starttls ("connect") if $rscheme eq "https"; 517 $state{handle}->starttls ("connect") if $rscheme eq "https";
486 518
487 # handle actual, non-tunneled, request 519 # handle actual, non-tunneled, request
488 my $handle_actual_request = sub { 520 my $handle_actual_request = sub {
489 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; 521 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
490 522
491 # send request 523 # send request
492 $state{handle}->push_write ( 524 $state{handle}->push_write (
493 "$method $rpath HTTP/1.0\015\012" 525 "$method $rpath HTTP/1.0\015\012"
494 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) 526 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
495 . "\015\012" 527 . "\015\012"
496 . (delete $arg{body}) 528 . (delete $arg{body})
497 );
498
499 # return if error occured during push_write()
500 return unless %state;
501
502 %hdr = (); # reduce memory usage, save a kitten
503
504 # status line
505 $state{handle}->push_read (line => $qr_nl, sub {
506 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
507 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
508
509 my %hdr = ( # response headers
510 HTTPVersion => ",$1",
511 Status => ",$2",
512 Reason => ",$3",
513 URL => ",$url"
514 ); 529 );
515 530
516 # headers, could be optimized a bit 531 # return if error occured during push_write()
532 return unless %state;
533
534 %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
535
536 # status line and headers
517 $state{handle}->unshift_read (line => $qr_nlnl, sub { 537 $state{handle}->push_read (line => $qr_nlnl, sub {
518 for ("$_[1]") { 538 for ("$_[1]") {
519 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 539 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
540
541 /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc
542 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response", @pseudo }));
543
544 push @pseudo,
545 HTTPVersion => $1,
546 Status => $2,
547 Reason => $3,
548 ;
520 549
521 # things seen, not parsed: 550 # things seen, not parsed:
522 # p3pP="NON CUR OTPi OUR NOR UNI" 551 # p3pP="NON CUR OTPi OUR NOR UNI"
523 552
524 $hdr{lc $1} .= ",$2" 553 $hdr{lc $1} .= ",$2"
… …
528 ((?: [^\012]+ | \012[\011\040] )*) 557 ((?: [^\012]+ | \012[\011\040] )*)
529 \012 558 \012
530 /gxc; 559 /gxc;
531 560
532 /\G$/ 561 /\G$/
533 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url })); 562 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", @pseudo }));
534 } 563 }
535 564
565 # remove the "," prefix we added to all headers above
536 substr $_, 0, 1, "" 566 substr $_, 0, 1, ""
537 for values %hdr; 567 for values %hdr;
568
569 # patch in all pseudo headers
570 %hdr = (%hdr, @pseudo);
538 571
539 # redirect handling 572 # redirect handling
540 # microsoft and other shitheads don't give a shit for following standards, 573 # microsoft and other shitheads don't give a shit for following standards,
541 # try to support some common forms of broken Location headers. 574 # try to support some common forms of broken Location headers.
542 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 575 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
… …
553 } 586 }
554 587
555 my $redirect; 588 my $redirect;
556 589
557 if ($recurse) { 590 if ($recurse) {
558 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 591 my $status = $hdr{Status};
559 # apparently, mozilla et al. just change POST to GET here 592
560 # more research is needed before we do the same 593 # industry standard is to redirect POST as GET for
561 $redirect = 1; 594 # 301, 302 and 303, in contrast to http/1.0 and 1.1.
562 } elsif ($hdr{Status} == 303) { 595 # also, the UA should ask the user for 301 and 307 and POST,
596 # industry standard seems to be to simply follow.
597 # we go with the industry standard.
598 if ($status == 301 or $status == 302 or $status == 303) {
563 # even http/1.1 is unclear on how to mutate the method 599 # HTTP/1.1 is unclear on how to mutate the method
564 $method = "GET" unless $method eq "HEAD"; 600 $method = "GET" unless $method eq "HEAD";
565 $redirect = 1; 601 $redirect = 1;
566 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 602 } elsif ($status == 307) {
567 $redirect = 1; 603 $redirect = 1;
568 } 604 }
569 } 605 }
570 606
571 my $finish = sub { 607 my $finish = sub {
… …
624 660
625 if ($redirect && exists $hdr{location}) { 661 if ($redirect && exists $hdr{location}) {
626 # we ignore any errors, as it is very common to receive 662 # we ignore any errors, as it is very common to receive
627 # Content-Length != 0 but no actual body 663 # Content-Length != 0 but no actual body
628 # we also access %hdr, as $_[1] might be an erro 664 # we also access %hdr, as $_[1] might be an erro
629 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); 665 http_request (
666 $method => $hdr{location},
667 %arg,
668 recurse => $recurse - 1,
669 Redirect => \@_,
670 $cb);
630 } else { 671 } else {
631 $cb->($_[0], $_[1]); 672 $cb->($_[0], $_[1]);
632 } 673 }
633 }; 674 };
634 675
635 my $len = $hdr{"content-length"}; 676 my $len = $hdr{"content-length"};
636 677
637 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { 678 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
638 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url }); 679 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
639 } elsif ( 680 } elsif (
640 $hdr{Status} =~ /^(?:1..|[23]04)$/ 681 $hdr{Status} =~ /^(?:1..|[23]04)$/
641 or $method eq "HEAD" 682 or $method eq "HEAD"
642 or (defined $len && !$len) 683 or (defined $len && !$len)
643 ) { 684 ) {
… …
646 } else { 687 } else {
647 # body handling, four different code paths 688 # body handling, four different code paths
648 # for want_body_handle, on_body (2x), normal (2x) 689 # for want_body_handle, on_body (2x), normal (2x)
649 # we might read too much here, but it does not matter yet (no pers. connections) 690 # we might read too much here, but it does not matter yet (no pers. connections)
650 if (!$redirect && $arg{want_body_handle}) { 691 if (!$redirect && $arg{want_body_handle}) {
651 $_[0]->on_eof (undef); 692 $_[0]->on_eof (undef);
652 $_[0]->on_error (undef); 693 $_[0]->on_error (undef);
653 $_[0]->on_read (undef); 694 $_[0]->on_read (undef);
654 695
655 $finish->(delete $state{handle}, \%hdr); 696 $finish->(delete $state{handle}, \%hdr);
656 697
657 } elsif ($arg{on_body}) { 698 } elsif ($arg{on_body}) {
658 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 699 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
659 if ($len) { 700 if ($len) {
660 $_[0]->on_eof (undef); 701 $_[0]->on_eof (undef);
661 $_[0]->on_read (sub { 702 $_[0]->on_read (sub {
662 $len -= length $_[0]{rbuf}; 703 $len -= length $_[0]{rbuf};
663 704
664 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 705 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
665 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url }); 706 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
666 707
667 $len > 0 708 $len > 0
668 or $finish->("", \%hdr); 709 or $finish->("", \%hdr);
669 }); 710 });
670 } else { 711 } else {
671 $_[0]->on_eof (sub { 712 $_[0]->on_eof (sub {
672 $finish->("", \%hdr); 713 $finish->("", \%hdr);
673 }); 714 });
674 $_[0]->on_read (sub { 715 $_[0]->on_read (sub {
675 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 716 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
676 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url }); 717 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
677 }); 718 });
678 } 719 }
679 } else { 720 } else {
680 $_[0]->on_eof (undef); 721 $_[0]->on_eof (undef);
681 722
682 if ($len) { 723 if ($len) {
683 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 724 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
684 $_[0]->on_read (sub { 725 $_[0]->on_read (sub {
685 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr) 726 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
686 if $len <= length $_[0]{rbuf}; 727 if $len <= length $_[0]{rbuf};
687 }); 728 });
688 } else { 729 } else {
689 $_[0]->on_error (sub { 730 $_[0]->on_error (sub {
690 $! == Errno::EPIPE || !$! 731 ($! == Errno::EPIPE || !$!)
691 ? $finish->(delete $_[0]{rbuf}, \%hdr) 732 ? $finish->(delete $_[0]{rbuf}, \%hdr)
692 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 733 : $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
693 }); 734 });
694 $_[0]->on_read (sub { }); 735 $_[0]->on_read (sub { });
695 } 736 }
696 } 737 }
697 } 738 }
698 }); 739 });
699 }); 740 };
700 };
701 741
702 # now handle proxy-CONNECT method 742 # now handle proxy-CONNECT method
703 if ($proxy && $uscheme eq "https") { 743 if ($proxy && $uscheme eq "https") {
704 # oh dear, we have to wrap it into a connect request 744 # oh dear, we have to wrap it into a connect request
705 745
706 # maybe re-use $uauthority with patched port? 746 # maybe re-use $uauthority with patched port?
707 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); 747 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
708 $state{handle}->push_read (line => $qr_nlnl, sub { 748 $state{handle}->push_read (line => $qr_nlnl, sub {
709 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 749 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
710 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url })); 750 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", @pseudo }));
711 751
712 if ($2 == 200) { 752 if ($2 == 200) {
713 $rpath = $upath; 753 $rpath = $upath;
714 &$handle_actual_request; 754 &$handle_actual_request;
715 } else { 755 } else {
716 %state = (); 756 %state = ();
717 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 757 $cb->(undef, { Status => $2, Reason => $3, @pseudo });
758 }
718 } 759 });
719 });
720 } else { 760 } else {
721 &$handle_actual_request; 761 &$handle_actual_request;
762 }
763
722 } 764 },
723
724 }, $arg{on_prepare} || sub { $timeout }; 765 $arg{on_prepare} || sub { $timeout }
766 );
725 }; 767 };
726 768
727 defined wantarray && AnyEvent::Util::guard { %state = () } 769 defined wantarray && AnyEvent::Util::guard { %state = () }
728} 770}
729 771
… …
743 &http_request 785 &http_request
744} 786}
745 787
746=back 788=back
747 789
790=head2 DNS CACHING
791
792AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
793the actual connection, which in turn uses AnyEvent::DNS to resolve
794hostnames. The latter is a simple stub resolver and does no caching
795on its own. If you want DNS caching, you currently have to provide
796your own default resolver (by storing a suitable resolver object in
797C<$AnyEvent::DNS::RESOLVER>).
798
748=head2 GLOBAL FUNCTIONS AND VARIABLES 799=head2 GLOBAL FUNCTIONS AND VARIABLES
749 800
750=over 4 801=over 4
751 802
752=item AnyEvent::HTTP::set_proxy "proxy-url" 803=item AnyEvent::HTTP::set_proxy "proxy-url"
… …
755string of the form C<http://host:port> (optionally C<https:...>), croaks 806string of the form C<http://host:port> (optionally C<https:...>), croaks
756otherwise. 807otherwise.
757 808
758To clear an already-set proxy, use C<undef>. 809To clear an already-set proxy, use C<undef>.
759 810
811=item $date = AnyEvent::HTTP::format_date $timestamp
812
813Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
814Date (RFC 2616).
815
816=item $timestamp = AnyEvent::HTTP::parse_date $date
817
818Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX
819timestamp, or C<undef> if the date cannot be parsed.
820
760=item $AnyEvent::HTTP::MAX_RECURSE 821=item $AnyEvent::HTTP::MAX_RECURSE
761 822
762The default value for the C<recurse> request parameter (default: C<10>). 823The default value for the C<recurse> request parameter (default: C<10>).
763 824
764=item $AnyEvent::HTTP::USERAGENT 825=item $AnyEvent::HTTP::USERAGENT
… …
782connections. This number of can be useful for load-leveling. 843connections. This number of can be useful for load-leveling.
783 844
784=back 845=back
785 846
786=cut 847=cut
848
849our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
850our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
851
852sub format_date($) {
853 my ($time) = @_;
854
855 # RFC 822/1123 format
856 my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
857
858 sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
859 $weekday[$wday], $mday, $month[$mon], $year + 1900,
860 $H, $M, $S;
861}
862
863sub parse_date($) {
864 my ($date) = @_;
865
866 my ($d, $m, $y, $H, $M, $S);
867
868 if ($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$/) {
869 # RFC 822/1123, required by RFC 2616
870 ($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
871
872 } elsif ($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$/) {
873 # RFC 850
874 ($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
875
876 } elsif ($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])$/) {
877 # ISO C's asctime
878 ($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
879 }
880 # other formats fail in the loop below
881
882 for (0..11) {
883 if ($m eq $month[$_]) {
884 require Time::Local;
885 return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
886 }
887 }
888
889 undef
890}
787 891
788sub set_proxy($) { 892sub set_proxy($) {
789 if (length $_[0]) { 893 if (length $_[0]) {
790 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix 894 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
791 or Carp::croak "$_[0]: invalid proxy URL"; 895 or Carp::croak "$_[0]: invalid proxy URL";
… …
798# initialise proxy from environment 902# initialise proxy from environment
799eval { 903eval {
800 set_proxy $ENV{http_proxy}; 904 set_proxy $ENV{http_proxy};
801}; 905};
802 906
907=head2 SOCKS PROXIES
908
909Socks proxies are not directly supported by AnyEvent::HTTP. You can
910compile your perl to support socks, or use an external program such as
911F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
912transparently.
913
914Alternatively, for AnyEvent::HTTP only, you can use your own
915C<tcp_connect> function that does the proxy handshake - here is an example
916that works with socks4a proxies:
917
918 use Errno;
919 use AnyEvent::Util;
920 use AnyEvent::Socket;
921 use AnyEvent::Handle;
922
923 # host, port and username of/for your socks4a proxy
924 my $socks_host = "10.0.0.23";
925 my $socks_port = 9050;
926 my $socks_user = "";
927
928 sub socks4a_connect {
929 my ($host, $port, $connect_cb, $prepare_cb) = @_;
930
931 my $hdl = new AnyEvent::Handle
932 connect => [$socks_host, $socks_port],
933 on_prepare => sub { $prepare_cb->($_[0]{fh}) },
934 on_error => sub { $connect_cb->() },
935 ;
936
937 $hdl->push_write (pack "CCnNZ*Z*", 4, 1, $port, 1, $socks_user, $host);
938
939 $hdl->push_read (chunk => 8, sub {
940 my ($hdl, $chunk) = @_;
941 my ($status, $port, $ipn) = unpack "xCna4", $chunk;
942
943 if ($status == 0x5a) {
944 $connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
945 } else {
946 $! = Errno::ENXIO; $connect_cb->();
947 }
948 });
949
950 $hdl
951 }
952
953Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
954possibly after switching off other proxy types:
955
956 AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
957
958 http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
959 my ($data, $headers) = @_;
960 ...
961 };
962
803=head1 SEE ALSO 963=head1 SEE ALSO
804 964
805L<AnyEvent>. 965L<AnyEvent>.
806 966
807=head1 AUTHOR 967=head1 AUTHOR

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