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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 1.62 by root, Thu Dec 30 04:30:24 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,
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136Whether to recurse requests or not, e.g. on redirects, authentication 147Whether to recurse requests or not, e.g. on redirects, authentication
137retries and so on, and how often to do so. 148retries and so on, and how often to do so.
138 149
139=item headers => hashref 150=item headers => hashref
140 151
141The request headers to use. Currently, C<http_request> may provide its 152The request headers to use, with the header name (I<MUST be in lowercase>)
142own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers 153as key and header value as hash value.
143and will provide defaults for C<User-Agent:> and C<Referer:> (this can be 154
155Currently, http_request> may provide its own C<host>, C<content-length>,
156C<connection> and C<cookie> headers and will provide defaults for
157C<user-agent> and C<referer> (this can be suppressed by using a value of
144suppressed by using C<undef> for these headers in which case they won't be 158C<undef> for these headers in which case they won't be sent at all).
145sent at all).
146 159
147=item timeout => $seconds 160=item timeout => $seconds
148 161
149The time-out to use for various stages - each connect attempt will reset 162The time-out to use for various stages - each connect attempt will reset
150the timeout, as will read or write activity, i.e. this is not an overall 163the timeout, as will read or write activity, i.e. this is not an overall
… …
199connect (for exmaple, to bind it on a given IP address). This parameter 212connect (for exmaple, to bind it on a given IP address). This parameter
200overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> 213overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
201and behaves exactly the same way (e.g. it has to provide a 214and behaves exactly the same way (e.g. it has to provide a
202timeout). See the description for the C<$prepare_cb> argument of 215timeout). See the description for the C<$prepare_cb> argument of
203C<AnyEvent::Socket::tcp_connect> for details. 216C<AnyEvent::Socket::tcp_connect> for details.
217
218=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb)
219
220In even rarer cases you want total control over how AnyEvent::HTTP
221establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect>
222to do this, but you can provide your own C<tcp_connect> function -
223obviously, it has to follow the same calling conventions, except that it
224may always return a connection guard object.
225
226There are probably lots of weird uses for this function, starting from
227tracing the hosts C<http_request> actually tries to connect, to (inexact
228but fast) host => IP address caching or even socks protocol support.
204 229
205=item on_header => $callback->($headers) 230=item on_header => $callback->($headers)
206 231
207When specified, this callback will be called with the header hash as soon 232When specified, this callback will be called with the header hash as soon
208as headers have been successfully received from the remote server (not on 233as headers have been successfully received from the remote server (not on
… …
326 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 351 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
327 352
328 _slot_schedule $_[0]; 353 _slot_schedule $_[0];
329} 354}
330 355
331our $qr_nl = qr{\015?\012};
332our $qr_nlnl = qr{(?<![^\012])\015?\012}; 356our $qr_nlnl = qr{(?<![^\012])\015?\012};
333 357
334our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; 358our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
335our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; 359our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
336 360
… …
349 while (my ($k, $v) = each %$hdr) { 373 while (my ($k, $v) = each %$hdr) {
350 $hdr{lc $k} = $v; 374 $hdr{lc $k} = $v;
351 } 375 }
352 } 376 }
353 377
378 # pseudo headers for all subsequent responses
379 my @pseudo = (URL => $url);
380 push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
381
354 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 382 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
355 383
356 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) 384 return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })
357 if $recurse < 0; 385 if $recurse < 0;
358 386
359 my $proxy = $arg{proxy} || $PROXY; 387 my $proxy = $arg{proxy} || $PROXY;
360 my $timeout = $arg{timeout} || $TIMEOUT; 388 my $timeout = $arg{timeout} || $TIMEOUT;
361 389
362 my ($uscheme, $uauthority, $upath, $query, $fragment) = 390 my ($uscheme, $uauthority, $upath, $query, $fragment) =
363 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 391 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
364 392
365 $uscheme = lc $uscheme; 393 $uscheme = lc $uscheme;
366 394
367 my $uport = $uscheme eq "http" ? 80 395 my $uport = $uscheme eq "http" ? 80
368 : $uscheme eq "https" ? 443 396 : $uscheme eq "https" ? 443
369 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url }); 397 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", @pseudo });
370 398
371 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 399 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
372 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); 400 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });
373 401
374 my $uhost = $1; 402 my $uhost = $1;
375 $uport = $2 if defined $2; 403 $uport = $2 if defined $2;
376 404
377 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" 405 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
378 unless exists $hdr{host}; 406 unless exists $hdr{host};
379 407
380 $uhost =~ s/^\[(.*)\]$/$1/; 408 $uhost =~ s/^\[(.*)\]$/$1/;
381 $upath .= "?$query" if length $query; 409 $upath .= $query if length $query;
382 410
383 $upath =~ s%^/?%/%; 411 $upath =~ s%^/?%/%;
384 412
385 # cookie processing 413 # cookie processing
386 if (my $jar = $arg{cookie_jar}) { 414 if (my $jar = $arg{cookie_jar}) {
… …
439 _get_slot $uhost, sub { 467 _get_slot $uhost, sub {
440 $state{slot_guard} = shift; 468 $state{slot_guard} = shift;
441 469
442 return unless $state{connect_guard}; 470 return unless $state{connect_guard};
443 471
444 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 472 my $tcp_connect = $arg{tcp_connect}
473 || do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
474
475 $state{connect_guard} = $tcp_connect->(
476 $rhost,
477 $rport,
478 sub {
445 $state{fh} = shift 479 $state{fh} = shift
446 or do { 480 or do {
447 my $err = "$!"; 481 my $err = "$!";
448 %state = (); 482 %state = ();
449 return $cb->(undef, { Status => 599, Reason => $err, URL => $url }); 483 return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
450 }; 484 };
451 485
452 pop; # free memory, save a tree 486 pop; # free memory, save a tree
453 487
454 return unless delete $state{connect_guard}; 488 return unless delete $state{connect_guard};
455 489
456 # get handle 490 # get handle
457 $state{handle} = new AnyEvent::Handle 491 $state{handle} = new AnyEvent::Handle
458 fh => $state{fh}, 492 fh => $state{fh},
493 peername => $rhost,
494 tls_ctx => $arg{tls_ctx},
495 # these need to be reconfigured on keepalive handles
459 timeout => $timeout, 496 timeout => $timeout,
460 peername => $rhost, 497 on_error => sub {
461 tls_ctx => $arg{tls_ctx}; 498 %state = ();
499 $cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
500 },
501 on_eof => sub {
502 %state = ();
503 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
504 },
505 ;
462 506
463 # limit the number of persistent connections 507 # limit the number of persistent connections
464 # keepalive not yet supported 508 # keepalive not yet supported
465 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 509# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
466 ++$KA_COUNT{$_[1]}; 510# ++$KA_COUNT{$_[1]};
467 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 511# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
468 --$KA_COUNT{$_[1]} 512# --$KA_COUNT{$_[1]}
469 }; 513# };
470 $hdr{connection} = "keep-alive"; 514# $hdr{connection} = "keep-alive";
471 } else { 515# } else {
472 delete $hdr{connection}; 516 delete $hdr{connection};
473 } 517# }
474 518
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"; 519 $state{handle}->starttls ("connect") if $rscheme eq "https";
486 520
487 # handle actual, non-tunneled, request 521 # handle actual, non-tunneled, request
488 my $handle_actual_request = sub { 522 my $handle_actual_request = sub {
489 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; 523 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
490 524
491 # send request 525 # send request
492 $state{handle}->push_write ( 526 $state{handle}->push_write (
493 "$method $rpath HTTP/1.0\015\012" 527 "$method $rpath HTTP/1.0\015\012"
494 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) 528 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
495 . "\015\012" 529 . "\015\012"
496 . (delete $arg{body}) 530 . (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 ); 531 );
512 532
513 # headers, could be optimized a bit 533 # return if error occured during push_write()
534 return unless %state;
535
536 %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
537
538 # status line and headers
514 $state{handle}->unshift_read (line => $qr_nlnl, sub { 539 $state{handle}->push_read (line => $qr_nlnl, sub {
515 for ("$_[1]") { 540 for ("$_[1]") {
516 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 541 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
542
543 /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc
544 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response", @pseudo }));
545
546 push @pseudo,
547 HTTPVersion => $1,
548 Status => $2,
549 Reason => $3,
550 ;
517 551
518 # things seen, not parsed: 552 # things seen, not parsed:
519 # p3pP="NON CUR OTPi OUR NOR UNI" 553 # p3pP="NON CUR OTPi OUR NOR UNI"
520 554
521 $hdr{lc $1} .= ",$2" 555 $hdr{lc $1} .= ",$2"
… …
525 ((?: [^\012]+ | \012[\011\040] )*) 559 ((?: [^\012]+ | \012[\011\040] )*)
526 \012 560 \012
527 /gxc; 561 /gxc;
528 562
529 /\G$/ 563 /\G$/
530 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url })); 564 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", @pseudo }));
531 } 565 }
532 566
567 # remove the "," prefix we added to all headers above
533 substr $_, 0, 1, "" 568 substr $_, 0, 1, ""
534 for values %hdr; 569 for values %hdr;
570
571 # patch in all pseudo headers
572 %hdr = (%hdr, @pseudo);
535 573
536 # redirect handling 574 # redirect handling
537 # microsoft and other shitheads don't give a shit for following standards, 575 # microsoft and other shitheads don't give a shit for following standards,
538 # try to support some common forms of broken Location headers. 576 # try to support some common forms of broken Location headers.
539 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 577 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
… …
550 } 588 }
551 589
552 my $redirect; 590 my $redirect;
553 591
554 if ($recurse) { 592 if ($recurse) {
555 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 593 my $status = $hdr{Status};
556 # apparently, mozilla et al. just change POST to GET here 594
557 # more research is needed before we do the same 595 # industry standard is to redirect POST as GET for
558 $redirect = 1; 596 # 301, 302 and 303, in contrast to http/1.0 and 1.1.
559 } elsif ($hdr{Status} == 303) { 597 # also, the UA should ask the user for 301 and 307 and POST,
598 # industry standard seems to be to simply follow.
599 # we go with the industry standard.
600 if ($status == 301 or $status == 302 or $status == 303) {
560 # even http/1.1 is unclear on how to mutate the method 601 # HTTP/1.1 is unclear on how to mutate the method
561 $method = "GET" unless $method eq "HEAD"; 602 $method = "GET" unless $method eq "HEAD";
562 $redirect = 1; 603 $redirect = 1;
563 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 604 } elsif ($status == 307) {
564 $redirect = 1; 605 $redirect = 1;
565 } 606 }
566 } 607 }
567 608
568 my $finish = sub { 609 my $finish = sub {
… …
621 662
622 if ($redirect && exists $hdr{location}) { 663 if ($redirect && exists $hdr{location}) {
623 # we ignore any errors, as it is very common to receive 664 # we ignore any errors, as it is very common to receive
624 # Content-Length != 0 but no actual body 665 # Content-Length != 0 but no actual body
625 # we also access %hdr, as $_[1] might be an erro 666 # we also access %hdr, as $_[1] might be an erro
626 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); 667 http_request (
668 $method => $hdr{location},
669 %arg,
670 recurse => $recurse - 1,
671 Redirect => \@_,
672 $cb);
627 } else { 673 } else {
628 $cb->($_[0], $_[1]); 674 $cb->($_[0], $_[1]);
629 } 675 }
630 }; 676 };
631 677
632 my $len = $hdr{"content-length"}; 678 my $len = $hdr{"content-length"};
633 679
634 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { 680 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
635 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url }); 681 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
636 } elsif ( 682 } elsif (
637 $hdr{Status} =~ /^(?:1..|[23]04)$/ 683 $hdr{Status} =~ /^(?:1..|[23]04)$/
638 or $method eq "HEAD" 684 or $method eq "HEAD"
639 or (defined $len && !$len) 685 or (defined $len && !$len)
640 ) { 686 ) {
… …
643 } else { 689 } else {
644 # body handling, four different code paths 690 # body handling, four different code paths
645 # for want_body_handle, on_body (2x), normal (2x) 691 # 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) 692 # we might read too much here, but it does not matter yet (no pers. connections)
647 if (!$redirect && $arg{want_body_handle}) { 693 if (!$redirect && $arg{want_body_handle}) {
648 $_[0]->on_eof (undef); 694 $_[0]->on_eof (undef);
649 $_[0]->on_error (undef); 695 $_[0]->on_error (undef);
650 $_[0]->on_read (undef); 696 $_[0]->on_read (undef);
651 697
652 $finish->(delete $state{handle}, \%hdr); 698 $finish->(delete $state{handle}, \%hdr);
653 699
654 } elsif ($arg{on_body}) { 700 } elsif ($arg{on_body}) {
655 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 701 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
656 if ($len) { 702 if ($len) {
657 $_[0]->on_eof (undef); 703 $_[0]->on_eof (undef);
658 $_[0]->on_read (sub { 704 $_[0]->on_read (sub {
659 $len -= length $_[0]{rbuf}; 705 $len -= length $_[0]{rbuf};
660 706
661 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 707 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
662 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url }); 708 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
663 709
664 $len > 0 710 $len > 0
665 or $finish->("", \%hdr); 711 or $finish->("", \%hdr);
666 }); 712 });
667 } else { 713 } else {
668 $_[0]->on_eof (sub { 714 $_[0]->on_eof (sub {
669 $finish->("", \%hdr); 715 $finish->("", \%hdr);
670 }); 716 });
671 $_[0]->on_read (sub { 717 $_[0]->on_read (sub {
672 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 718 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
673 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url }); 719 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
674 }); 720 });
675 } 721 }
676 } else { 722 } else {
677 $_[0]->on_eof (undef); 723 $_[0]->on_eof (undef);
678 724
679 if ($len) { 725 if ($len) {
680 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 726 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
681 $_[0]->on_read (sub { 727 $_[0]->on_read (sub {
682 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr) 728 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
683 if $len <= length $_[0]{rbuf}; 729 if $len <= length $_[0]{rbuf};
684 }); 730 });
685 } else { 731 } else {
686 $_[0]->on_error (sub { 732 $_[0]->on_error (sub {
687 $! == Errno::EPIPE || !$! 733 ($! == Errno::EPIPE || !$!)
688 ? $finish->(delete $_[0]{rbuf}, \%hdr) 734 ? $finish->(delete $_[0]{rbuf}, \%hdr)
689 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 735 : $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
690 }); 736 });
691 $_[0]->on_read (sub { }); 737 $_[0]->on_read (sub { });
692 } 738 }
693 } 739 }
694 } 740 }
695 }); 741 });
696 }); 742 };
697 };
698 743
699 # now handle proxy-CONNECT method 744 # now handle proxy-CONNECT method
700 if ($proxy && $uscheme eq "https") { 745 if ($proxy && $uscheme eq "https") {
701 # oh dear, we have to wrap it into a connect request 746 # oh dear, we have to wrap it into a connect request
702 747
703 # maybe re-use $uauthority with patched port? 748 # 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"); 749 $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 { 750 $state{handle}->push_read (line => $qr_nlnl, sub {
706 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 751 $_[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 })); 752 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", @pseudo }));
708 753
709 if ($2 == 200) { 754 if ($2 == 200) {
710 $rpath = $upath; 755 $rpath = $upath;
711 &$handle_actual_request; 756 &$handle_actual_request;
712 } else { 757 } else {
713 %state = (); 758 %state = ();
714 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 759 $cb->(undef, { Status => $2, Reason => $3, @pseudo });
760 }
715 } 761 });
716 });
717 } else { 762 } else {
718 &$handle_actual_request; 763 &$handle_actual_request;
764 }
765
719 } 766 },
720
721 }, $arg{on_prepare} || sub { $timeout }; 767 $arg{on_prepare} || sub { $timeout }
768 );
722 }; 769 };
723 770
724 defined wantarray && AnyEvent::Util::guard { %state = () } 771 defined wantarray && AnyEvent::Util::guard { %state = () }
725} 772}
726 773
… …
740 &http_request 787 &http_request
741} 788}
742 789
743=back 790=back
744 791
792=head2 DNS CACHING
793
794AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
795the actual connection, which in turn uses AnyEvent::DNS to resolve
796hostnames. The latter is a simple stub resolver and does no caching
797on its own. If you want DNS caching, you currently have to provide
798your own default resolver (by storing a suitable resolver object in
799C<$AnyEvent::DNS::RESOLVER>).
800
745=head2 GLOBAL FUNCTIONS AND VARIABLES 801=head2 GLOBAL FUNCTIONS AND VARIABLES
746 802
747=over 4 803=over 4
748 804
749=item AnyEvent::HTTP::set_proxy "proxy-url" 805=item AnyEvent::HTTP::set_proxy "proxy-url"
… …
752string of the form C<http://host:port> (optionally C<https:...>), croaks 808string of the form C<http://host:port> (optionally C<https:...>), croaks
753otherwise. 809otherwise.
754 810
755To clear an already-set proxy, use C<undef>. 811To clear an already-set proxy, use C<undef>.
756 812
813=item $date = AnyEvent::HTTP::format_date $timestamp
814
815Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP
816Date (RFC 2616).
817
818=item $timestamp = AnyEvent::HTTP::parse_date $date
819
820Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX
821timestamp, or C<undef> if the date cannot be parsed.
822
757=item $AnyEvent::HTTP::MAX_RECURSE 823=item $AnyEvent::HTTP::MAX_RECURSE
758 824
759The default value for the C<recurse> request parameter (default: C<10>). 825The default value for the C<recurse> request parameter (default: C<10>).
760 826
761=item $AnyEvent::HTTP::USERAGENT 827=item $AnyEvent::HTTP::USERAGENT
… …
779connections. This number of can be useful for load-leveling. 845connections. This number of can be useful for load-leveling.
780 846
781=back 847=back
782 848
783=cut 849=cut
850
851our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
852our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
853
854sub format_date($) {
855 my ($time) = @_;
856
857 # RFC 822/1123 format
858 my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time;
859
860 sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT",
861 $weekday[$wday], $mday, $month[$mon], $year + 1900,
862 $H, $M, $S;
863}
864
865sub parse_date($) {
866 my ($date) = @_;
867
868 my ($d, $m, $y, $H, $M, $S);
869
870 if ($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$/) {
871 # RFC 822/1123, required by RFC 2616
872 ($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6);
873
874 } elsif ($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$/) {
875 # RFC 850
876 ($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6);
877
878 } elsif ($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])$/) {
879 # ISO C's asctime
880 ($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5);
881 }
882 # other formats fail in the loop below
883
884 for (0..11) {
885 if ($m eq $month[$_]) {
886 require Time::Local;
887 return Time::Local::timegm ($S, $M, $H, $d, $_, $y);
888 }
889 }
890
891 undef
892}
784 893
785sub set_proxy($) { 894sub set_proxy($) {
786 if (length $_[0]) { 895 if (length $_[0]) {
787 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix 896 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
788 or Carp::croak "$_[0]: invalid proxy URL"; 897 or Carp::croak "$_[0]: invalid proxy URL";
… …
795# initialise proxy from environment 904# initialise proxy from environment
796eval { 905eval {
797 set_proxy $ENV{http_proxy}; 906 set_proxy $ENV{http_proxy};
798}; 907};
799 908
909=head2 SOCKS PROXIES
910
911Socks proxies are not directly supported by AnyEvent::HTTP. You can
912compile your perl to support socks, or use an external program such as
913F<socksify> (dante) or F<tsocks> to make your program use a socks proxy
914transparently.
915
916Alternatively, for AnyEvent::HTTP only, you can use your own
917C<tcp_connect> function that does the proxy handshake - here is an example
918that works with socks4a proxies:
919
920 use Errno;
921 use AnyEvent::Util;
922 use AnyEvent::Socket;
923 use AnyEvent::Handle;
924
925 # host, port and username of/for your socks4a proxy
926 my $socks_host = "10.0.0.23";
927 my $socks_port = 9050;
928 my $socks_user = "";
929
930 sub socks4a_connect {
931 my ($host, $port, $connect_cb, $prepare_cb) = @_;
932
933 my $hdl = new AnyEvent::Handle
934 connect => [$socks_host, $socks_port],
935 on_prepare => sub { $prepare_cb->($_[0]{fh}) },
936 on_error => sub { $connect_cb->() },
937 ;
938
939 $hdl->push_write (pack "CCnNZ*Z*", 4, 1, $port, 1, $socks_user, $host);
940
941 $hdl->push_read (chunk => 8, sub {
942 my ($hdl, $chunk) = @_;
943 my ($status, $port, $ipn) = unpack "xCna4", $chunk;
944
945 if ($status == 0x5a) {
946 $connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port");
947 } else {
948 $! = Errno::ENXIO; $connect_cb->();
949 }
950 });
951
952 $hdl
953 }
954
955Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s,
956possibly after switching off other proxy types:
957
958 AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies
959
960 http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub {
961 my ($data, $headers) = @_;
962 ...
963 };
964
800=head1 SEE ALSO 965=head1 SEE ALSO
801 966
802L<AnyEvent>. 967L<AnyEvent>.
803 968
804=head1 AUTHOR 969=head1 AUTHOR

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