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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.53 by root, Sat Dec 5 15:37:07 2009 UTC vs.
Revision 1.60 by root, Thu Dec 30 02:56:28 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 %hdr = (); # reduce memory usage, save a kitten
500
501 # status line
502 $state{handle}->push_read (line => $qr_nl, sub {
503 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
504 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
505
506 my %hdr = ( # response headers
507 HTTPVersion => ",$1",
508 Status => ",$2",
509 Reason => ",$3",
510 URL => ",$url"
511 ); 529 );
512 530
513 # 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
514 $state{handle}->unshift_read (line => $qr_nlnl, sub { 537 $state{handle}->push_read (line => $qr_nlnl, sub {
515 for ("$_[1]") { 538 for ("$_[1]") {
516 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 ;
517 549
518 # things seen, not parsed: 550 # things seen, not parsed:
519 # p3pP="NON CUR OTPi OUR NOR UNI" 551 # p3pP="NON CUR OTPi OUR NOR UNI"
520 552
521 $hdr{lc $1} .= ",$2" 553 $hdr{lc $1} .= ",$2"
… …
525 ((?: [^\012]+ | \012[\011\040] )*) 557 ((?: [^\012]+ | \012[\011\040] )*)
526 \012 558 \012
527 /gxc; 559 /gxc;
528 560
529 /\G$/ 561 /\G$/
530 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 }));
531 } 563 }
532 564
565 # remove the "," prefix we added to all headers above
533 substr $_, 0, 1, "" 566 substr $_, 0, 1, ""
534 for values %hdr; 567 for values %hdr;
568
569 # patch in all pseudo headers
570 %hdr = (%hdr, @pseudo);
535 571
536 # redirect handling 572 # redirect handling
537 # microsoft and other shitheads don't give a shit for following standards, 573 # microsoft and other shitheads don't give a shit for following standards,
538 # try to support some common forms of broken Location headers. 574 # try to support some common forms of broken Location headers.
539 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 575 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
… …
550 } 586 }
551 587
552 my $redirect; 588 my $redirect;
553 589
554 if ($recurse) { 590 if ($recurse) {
555 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 591 my $status = $hdr{Status};
556 # apparently, mozilla et al. just change POST to GET here 592
557 # more research is needed before we do the same 593 # industry standard is to redirect POST as GET for
558 $redirect = 1; 594 # 301, 302 and 303, in contrast to http/1.0 and 1.1.
559 } elsif ($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) {
560 # even http/1.1 is unclear on how to mutate the method 599 # HTTP/1.1 is unclear on how to mutate the method
561 $method = "GET" unless $method eq "HEAD"; 600 $method = "GET" unless $method eq "HEAD";
562 $redirect = 1; 601 $redirect = 1;
563 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 602 } elsif ($status == 307) {
564 $redirect = 1; 603 $redirect = 1;
565 } 604 }
566 } 605 }
567 606
568 my $finish = sub { 607 my $finish = sub {
… …
621 660
622 if ($redirect && exists $hdr{location}) { 661 if ($redirect && exists $hdr{location}) {
623 # we ignore any errors, as it is very common to receive 662 # we ignore any errors, as it is very common to receive
624 # Content-Length != 0 but no actual body 663 # Content-Length != 0 but no actual body
625 # we also access %hdr, as $_[1] might be an erro 664 # we also access %hdr, as $_[1] might be an erro
626 http_request ($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);
627 } else { 671 } else {
628 $cb->($_[0], $_[1]); 672 $cb->($_[0], $_[1]);
629 } 673 }
630 }; 674 };
631 675
632 my $len = $hdr{"content-length"}; 676 my $len = $hdr{"content-length"};
633 677
634 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { 678 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
635 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url }); 679 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
636 } elsif ( 680 } elsif (
637 $hdr{Status} =~ /^(?:1..|[23]04)$/ 681 $hdr{Status} =~ /^(?:1..|[23]04)$/
638 or $method eq "HEAD" 682 or $method eq "HEAD"
639 or (defined $len && !$len) 683 or (defined $len && !$len)
640 ) { 684 ) {
… …
643 } else { 687 } else {
644 # body handling, four different code paths 688 # body handling, four different code paths
645 # for want_body_handle, on_body (2x), normal (2x) 689 # for want_body_handle, on_body (2x), normal (2x)
646 # 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)
647 if (!$redirect && $arg{want_body_handle}) { 691 if (!$redirect && $arg{want_body_handle}) {
648 $_[0]->on_eof (undef); 692 $_[0]->on_eof (undef);
649 $_[0]->on_error (undef); 693 $_[0]->on_error (undef);
650 $_[0]->on_read (undef); 694 $_[0]->on_read (undef);
651 695
652 $finish->(delete $state{handle}, \%hdr); 696 $finish->(delete $state{handle}, \%hdr);
653 697
654 } elsif ($arg{on_body}) { 698 } elsif ($arg{on_body}) {
655 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 699 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
656 if ($len) { 700 if ($len) {
657 $_[0]->on_eof (undef); 701 $_[0]->on_eof (undef);
658 $_[0]->on_read (sub { 702 $_[0]->on_read (sub {
659 $len -= length $_[0]{rbuf}; 703 $len -= length $_[0]{rbuf};
660 704
661 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 705 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
662 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 });
663 707
664 $len > 0 708 $len > 0
665 or $finish->("", \%hdr); 709 or $finish->("", \%hdr);
666 }); 710 });
667 } else { 711 } else {
668 $_[0]->on_eof (sub { 712 $_[0]->on_eof (sub {
669 $finish->("", \%hdr); 713 $finish->("", \%hdr);
670 }); 714 });
671 $_[0]->on_read (sub { 715 $_[0]->on_read (sub {
672 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 716 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
673 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 });
674 }); 718 });
675 } 719 }
676 } else { 720 } else {
677 $_[0]->on_eof (undef); 721 $_[0]->on_eof (undef);
678 722
679 if ($len) { 723 if ($len) {
680 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 724 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
681 $_[0]->on_read (sub { 725 $_[0]->on_read (sub {
682 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr) 726 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
683 if $len <= length $_[0]{rbuf}; 727 if $len <= length $_[0]{rbuf};
684 }); 728 });
685 } else { 729 } else {
686 $_[0]->on_error (sub { 730 $_[0]->on_error (sub {
687 $! == Errno::EPIPE || !$! 731 ($! == Errno::EPIPE || !$!)
688 ? $finish->(delete $_[0]{rbuf}, \%hdr) 732 ? $finish->(delete $_[0]{rbuf}, \%hdr)
689 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 733 : $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
690 }); 734 });
691 $_[0]->on_read (sub { }); 735 $_[0]->on_read (sub { });
692 } 736 }
693 } 737 }
694 } 738 }
695 }); 739 });
696 }); 740 };
697 };
698 741
699 # now handle proxy-CONNECT method 742 # now handle proxy-CONNECT method
700 if ($proxy && $uscheme eq "https") { 743 if ($proxy && $uscheme eq "https") {
701 # oh dear, we have to wrap it into a connect request 744 # oh dear, we have to wrap it into a connect request
702 745
703 # maybe re-use $uauthority with patched port? 746 # maybe re-use $uauthority with patched port?
704 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); 747 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
705 $state{handle}->push_read (line => $qr_nlnl, sub { 748 $state{handle}->push_read (line => $qr_nlnl, sub {
706 $_[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
707 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 }));
708 751
709 if ($2 == 200) { 752 if ($2 == 200) {
710 $rpath = $upath; 753 $rpath = $upath;
711 &$handle_actual_request; 754 &$handle_actual_request;
712 } else { 755 } else {
713 %state = (); 756 %state = ();
714 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 757 $cb->(undef, { Status => $2, Reason => $3, @pseudo });
758 }
715 } 759 });
716 });
717 } else { 760 } else {
718 &$handle_actual_request; 761 &$handle_actual_request;
762 }
763
719 } 764 },
720
721 }, $arg{on_prepare} || sub { $timeout }; 765 $arg{on_prepare} || sub { $timeout }
766 );
722 }; 767 };
723 768
724 defined wantarray && AnyEvent::Util::guard { %state = () } 769 defined wantarray && AnyEvent::Util::guard { %state = () }
725} 770}
726 771
… …
739 unshift @_, "POST", $url, "body"; 784 unshift @_, "POST", $url, "body";
740 &http_request 785 &http_request
741} 786}
742 787
743=back 788=back
789
790=head2 DNS CACHING
791
792AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
793the actual connection, which in turn uses AnyEvent::DNS to resolve
794hostnames. The latter is a simple stub resolver and does no caching
795on its own. If you want DNS caching, you currently have to provide
796your own default resolver (by storing a suitable resolver object in
797C<$AnyEvent::DNS::RESOLVER>).
744 798
745=head2 GLOBAL FUNCTIONS AND VARIABLES 799=head2 GLOBAL FUNCTIONS AND VARIABLES
746 800
747=over 4 801=over 4
748 802
… …
795# initialise proxy from environment 849# initialise proxy from environment
796eval { 850eval {
797 set_proxy $ENV{http_proxy}; 851 set_proxy $ENV{http_proxy};
798}; 852};
799 853
854=head2 SOCKS PROXIES
855
856Socks proxies are not directly supported by AnyEvent::HTTP. You can
857compile your perl to support socks, or use an external program such as
858F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
859transparently.
860
861Alternatively, for AnyEvent::HTTP only, you can use your own
862C<tcp_connect> function that does the proxy handshake - here is an example
863that works with socks4a proxies:
864
865 use Errno;
866 use AnyEvent::Util;
867 use AnyEvent::Socket;
868 use AnyEvent::Handle;
869
870 # host, port and username of/for your socks4a proxy
871 my $socks_host = "10.0.0.23";
872 my $socks_port = 9050;
873 my $socks_user = "";
874
875 sub socks4a_connect {
876 my ($host, $port, $connect_cb, $prepare_cb) = @_;
877
878 my $hdl = new AnyEvent::Handle
879 connect => [$socks_host, $socks_port],
880 on_prepare => sub { $prepare_cb->($_[0]{fh}) },
881 on_error => sub { $connect_cb->() },
882 ;
883
884 $hdl->push_write (pack "CCnNZ*Z*", 4, 1, $port, 1, $socks_user, $host);
885
886 $hdl->push_read (chunk => 8, sub {
887 my ($hdl, $chunk) = @_;
888 my ($status, $port, $ipn) = unpack "xCna4", $chunk;
889
890 if ($status == 0x5a) {
891 $connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
892 } else {
893 $! = Errno::ENXIO; $connect_cb->();
894 }
895 });
896
897 $hdl
898 }
899
900Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
901possibly after switching off other proxy types:
902
903 AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
904
905 http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
906 my ($data, $headers) = @_;
907 ...
908 };
909
800=head1 SEE ALSO 910=head1 SEE ALSO
801 911
802L<AnyEvent>. 912L<AnyEvent>.
803 913
804=head1 AUTHOR 914=head1 AUTHOR

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