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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 1.64 by root, Fri Dec 31 02:53:29 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. 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,
… …
199connect (for exmaple, to bind it on a given IP address). This parameter 213connect (for exmaple, to bind it on a given IP address). This parameter
200overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> 214overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
201and behaves exactly the same way (e.g. it has to provide a 215and behaves exactly the same way (e.g. it has to provide a
202timeout). See the description for the C<$prepare_cb> argument of 216timeout). See the description for the C<$prepare_cb> argument of
203C<AnyEvent::Socket::tcp_connect> for details. 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.
204 230
205=item on_header => $callback->($headers) 231=item on_header => $callback->($headers)
206 232
207When 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
208as headers have been successfully received from the remote server (not on 234as headers have been successfully received from the remote server (not on
… …
326 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 352 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
327 353
328 _slot_schedule $_[0]; 354 _slot_schedule $_[0];
329} 355}
330 356
331our $qr_nl = qr{\015?\012};
332our $qr_nlnl = qr{(?<![^\012])\015?\012}; 357our $qr_nlnl = qr{(?<![^\012])\015?\012};
333 358
334our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; 359our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
335our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; 360our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
336 361
… …
349 while (my ($k, $v) = each %$hdr) { 374 while (my ($k, $v) = each %$hdr) {
350 $hdr{lc $k} = $v; 375 $hdr{lc $k} = $v;
351 } 376 }
352 } 377 }
353 378
379 # pseudo headers for all subsequent responses
380 my @pseudo = (URL => $url);
381 push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
382
354 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 383 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
355 384
356 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) 385 return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" })
357 if $recurse < 0; 386 if $recurse < 0;
358 387
359 my $proxy = $arg{proxy} || $PROXY; 388 my $proxy = $arg{proxy} || $PROXY;
360 my $timeout = $arg{timeout} || $TIMEOUT; 389 my $timeout = $arg{timeout} || $TIMEOUT;
361 390
362 my ($uscheme, $uauthority, $upath, $query, $fragment) = 391 my ($uscheme, $uauthority, $upath, $query, $fragment) =
363 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 392 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
364 393
365 $uscheme = lc $uscheme; 394 $uscheme = lc $uscheme;
366 395
367 my $uport = $uscheme eq "http" ? 80 396 my $uport = $uscheme eq "http" ? 80
368 : $uscheme eq "https" ? 443 397 : $uscheme eq "https" ? 443
369 : 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" });
370 399
371 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 400 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
372 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); 401 or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" });
373 402
374 my $uhost = $1; 403 my $uhost = $1;
375 $uport = $2 if defined $2; 404 $uport = $2 if defined $2;
376 405
377 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" 406 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
378 unless exists $hdr{host}; 407 unless exists $hdr{host};
379 408
380 $uhost =~ s/^\[(.*)\]$/$1/; 409 $uhost =~ s/^\[(.*)\]$/$1/;
381 $upath .= "?$query" if length $query; 410 $upath .= $query if length $query;
382 411
383 $upath =~ s%^/?%/%; 412 $upath =~ s%^/?%/%;
384 413
385 # cookie processing 414 # cookie processing
386 if (my $jar = $arg{cookie_jar}) { 415 if (my $jar = $arg{cookie_jar}) {
… …
439 _get_slot $uhost, sub { 468 _get_slot $uhost, sub {
440 $state{slot_guard} = shift; 469 $state{slot_guard} = shift;
441 470
442 return unless $state{connect_guard}; 471 return unless $state{connect_guard};
443 472
444 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 473 my $connect_cb = sub {
445 $state{fh} = shift 474 $state{fh} = shift
446 or do { 475 or do {
447 my $err = "$!"; 476 my $err = "$!";
448 %state = (); 477 %state = ();
449 return $cb->(undef, { Status => 599, Reason => $err, URL => $url }); 478 return $cb->(undef, { @pseudo, Status => 599, Reason => $err });
450 }; 479 };
451 480
452 pop; # free memory, save a tree 481 pop; # free memory, save a tree
453 482
454 return unless delete $state{connect_guard}; 483 return unless delete $state{connect_guard};
455 484
456 # get handle 485 # get handle
457 $state{handle} = new AnyEvent::Handle 486 $state{handle} = new AnyEvent::Handle
458 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
459 timeout => $timeout, 491 timeout => $timeout,
460 peername => $rhost, 492 on_error => sub {
461 tls_ctx => $arg{tls_ctx}; 493 %state = ();
494 $cb->(undef, { @pseudo, Status => 599, Reason => $_[2] });
495 },
496 on_eof => sub {
497 %state = ();
498 $cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" });
499 },
500 ;
462 501
463 # limit the number of persistent connections 502 # limit the number of persistent connections
464 # keepalive not yet supported 503 # keepalive not yet supported
465 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 504# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
466 ++$KA_COUNT{$_[1]}; 505# ++$KA_COUNT{$_[1]};
467 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 506# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
468 --$KA_COUNT{$_[1]} 507# --$KA_COUNT{$_[1]}
469 }; 508# };
470 $hdr{connection} = "keep-alive"; 509# $hdr{connection} = "keep-alive";
471 } else { 510# } else {
472 delete $hdr{connection}; 511 delete $hdr{connection};
473 } 512# }
474
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 });
484 513
485 $state{handle}->starttls ("connect") if $rscheme eq "https"; 514 $state{handle}->starttls ("connect") if $rscheme eq "https";
486 515
487 # handle actual, non-tunneled, request 516 # handle actual, non-tunneled, request
488 my $handle_actual_request = sub { 517 my $handle_actual_request = sub {
… …
494 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) 523 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
495 . "\015\012" 524 . "\015\012"
496 . (delete $arg{body}) 525 . (delete $arg{body})
497 ); 526 );
498 527
528 # return if error occured during push_write()
529 return unless %state;
530
499 %hdr = (); # reduce memory usage, save a kitten 531 %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
500 532
501 # status line 533 # status line and headers
502 $state{handle}->push_read (line => $qr_nl, sub { 534 $state{handle}->push_read (line => $qr_nlnl, sub {
503 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 535 my $keepalive = pop;
504 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
505 536
506 my %hdr = ( # response headers
507 HTTPVersion => ",$1",
508 Status => ",$2",
509 Reason => ",$3",
510 URL => ",$url"
511 );
512
513 # headers, could be optimized a bit
514 $state{handle}->unshift_read (line => $qr_nlnl, sub {
515 for ("$_[1]") { 537 for ("$_[1]") {
516 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.
517 539
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
518 # things seen, not parsed: 549 # things seen, not parsed:
519 # p3pP="NON CUR OTPi OUR NOR UNI" 550 # p3pP="NON CUR OTPi OUR NOR UNI"
520 551
521 $hdr{lc $1} .= ",$2" 552 $hdr{lc $1} .= ",$2"
522 while /\G 553 while /\G
523 ([^:\000-\037]*): 554 ([^:\000-\037]*):
524 [\011\040]* 555 [\011\040]*
525 ((?: [^\012]+ | \012[\011\040] )*) 556 ((?: [^\012]+ | \012[\011\040] )*)
526 \012 557 \012
527 /gxc; 558 /gxc;
528 559
529 /\G$/ 560 /\G$/
530 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 $url =~ s/\/[^\/]*$//;
531 } 582 }
532 583
533 substr $_, 0, 1, ""
534 for values %hdr;
535
536 # redirect handling
537 # microsoft and other shitheads don't give a shit for following standards,
538 # try to support some common forms of broken Location headers.
539 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
540 $hdr{location} =~ s/^\.\/+//;
541
542 my $url = "$rscheme://$uhost:$uport";
543
544 unless ($hdr{location} =~ s/^\///) {
545 $url .= $upath;
546 $url =~ s/\/[^\/]*$//;
547 }
548
549 $hdr{location} = "$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;
550 } 603 }
604 }
551 605
552 my $redirect; 606 my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive])
607 $state{handle}->destroy if $state{handle};
608 %state = ();
553 609
610 if (defined $_[1]) {
611 $hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1];
612 $hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2];
613 }
614
615 # set-cookie processing
554 if ($recurse) { 616 if ($arg{cookie_jar}) {
555 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 617 for ($hdr{"set-cookie"}) {
556 # apparently, mozilla et al. just change POST to GET here 618 # parse NAME=VALUE
557 # more research is needed before we do the same 619 my @kv;
620
621 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
558 $redirect = 1; 622 my $name = $1;
559 } elsif ($hdr{Status} == 303) { 623 my $value = $3;
560 # even http/1.1 is unclear on how to mutate the method 624
561 $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
562 $redirect = 1; 657 # store it
563 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 658 $arg{cookie_jar}{version} = 1;
564 $redirect = 1; 659 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
660
661 redo if /\G\s*,/gc;
565 } 662 }
566 } 663 }
567 664
568 my $finish = sub { 665 if ($redirect && exists $hdr{location}) {
569 $state{handle}->destroy if $state{handle}; 666 # we ignore any errors, as it is very common to receive
570 %state = (); 667 # Content-Length != 0 but no actual body
571 668 # we also access %hdr, as $_[1] might be an erro
572 # set-cookie processing 669 http_request (
573 if ($arg{cookie_jar}) { 670 $method => $hdr{location},
574 for ($_[1]{"set-cookie"}) {
575 # parse NAME=VALUE
576 my @kv;
577
578 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
579 my $name = $1;
580 my $value = $3;
581
582 unless ($value) {
583 $value = $2;
584 $value =~ s/\\(.)/$1/gs;
585 } 671 %arg,
672 recurse => $recurse - 1,
673 Redirect => [$_[0], \%hdr],
674 $cb);
675 } else {
676 $cb->($_[0], \%hdr);
677 }
678 };
586 679
587 push @kv, $name => $value; 680 my $len = $hdr{"content-length"};
588 681
589 last unless /\G\s*;/gc; 682 if (!$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
590 } 711 $len > 0
591 712 or $finish->("", undef, undef, 1);
592 last unless @kv;
593
594 my $name = shift @kv;
595 my %kv = (value => shift @kv, @kv);
596
597 my $cdom;
598 my $cpath = (delete $kv{path}) || "/";
599
600 if (exists $kv{domain}) {
601 $cdom = delete $kv{domain};
602
603 $cdom =~ s/^\.?/./; # make sure it starts with a "."
604
605 next if $cdom =~ /\.$/;
606
607 # this is not rfc-like and not netscape-like. go figure.
608 my $ndots = $cdom =~ y/.//;
609 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
610 } else {
611 $cdom = $uhost;
612 }
613
614 # store it
615 $arg{cookie_jar}{version} = 1;
616 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
617
618 redo if /\G\s*,/gc;
619 } 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 });
620 } 722 }
723 } else {
724 $_[0]->on_eof (undef);
621 725
622 if ($redirect && exists $hdr{location}) { 726 if ($len) {
623 # we ignore any errors, as it is very common to receive 727 $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) });
624 # Content-Length != 0 but no actual body 728 $_[0]->on_read (sub {
625 # we also access %hdr, as $_[1] might be an erro 729 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1)
626 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); 730 if $len <= length $_[0]{rbuf};
731 });
627 } else { 732 } else {
628 $cb->($_[0], $_[1]);
629 }
630 };
631
632 my $len = $hdr{"content-length"};
633
634 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
635 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
636 } elsif (
637 $hdr{Status} =~ /^(?:1..|[23]04)$/
638 or $method eq "HEAD"
639 or (defined $len && !$len)
640 ) {
641 # no body
642 $finish->("", \%hdr);
643 } else {
644 # body handling, four different code paths
645 # for want_body_handle, on_body (2x), normal (2x)
646 # we might read too much here, but it does not matter yet (no pers. connections)
647 if (!$redirect && $arg{want_body_handle}) {
648 $_[0]->on_eof (undef);
649 $_[0]->on_error (undef);
650 $_[0]->on_read (undef);
651
652 $finish->(delete $state{handle}, \%hdr);
653
654 } elsif ($arg{on_body}) {
655 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
656 if ($len) {
657 $_[0]->on_eof (undef);
658 $_[0]->on_read (sub {
659 $len -= length $_[0]{rbuf};
660
661 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
662 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
663
664 $len > 0
665 or $finish->("", \%hdr);
666 });
667 } else {
668 $_[0]->on_eof (sub {
669 $finish->("", \%hdr);
670 });
671 $_[0]->on_read (sub {
672 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
673 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
674 });
675 }
676 } else {
677 $_[0]->on_eof (undef);
678
679 if ($len) {
680 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
681 $_[0]->on_read (sub {
682 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
683 if $len <= length $_[0]{rbuf};
684 });
685 } else {
686 $_[0]->on_error (sub { 733 $_[0]->on_error (sub {
687 $! == Errno::EPIPE || !$! 734 ($! == Errno::EPIPE || !$!)
688 ? $finish->(delete $_[0]{rbuf}, \%hdr) 735 ? $finish->(delete $_[0]{rbuf})
689 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 736 : $finish->(undef, 599 => $_[2]);
690 }); 737 });
691 $_[0]->on_read (sub { }); 738 $_[0]->on_read (sub { });
692 }
693 } 739 }
694 } 740 }
695 }); 741 }
696 }); 742 });
697 }; 743 };
698 744
699 # now handle proxy-CONNECT method 745 # now handle proxy-CONNECT method
700 if ($proxy && $uscheme eq "https") { 746 if ($proxy && $uscheme eq "https") {
… …
702 748
703 # maybe re-use $uauthority with patched port? 749 # 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"); 750 $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 { 751 $state{handle}->push_read (line => $qr_nlnl, sub {
706 $_[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
707 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])" }));
708 754
709 if ($2 == 200) { 755 if ($2 == 200) {
710 $rpath = $upath; 756 $rpath = $upath;
711 &$handle_actual_request; 757 &$handle_actual_request;
712 } else { 758 } else {
713 %state = (); 759 %state = ();
714 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 760 $cb->(undef, { @pseudo, Status => $2, Reason => $3 });
715 } 761 }
716 }); 762 });
717 } else { 763 } else {
718 &$handle_actual_request; 764 &$handle_actual_request;
719 } 765 }
766 };
720 767
721 }, $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 { $timeout });
772
722 }; 773 };
723 774
724 defined wantarray && AnyEvent::Util::guard { %state = () } 775 defined wantarray && AnyEvent::Util::guard { %state = () }
725} 776}
726 777
… …
740 &http_request 791 &http_request
741} 792}
742 793
743=back 794=back
744 795
796=head2 DNS CACHING
797
798AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
799the actual connection, which in turn uses AnyEvent::DNS to resolve
800hostnames. The latter is a simple stub resolver and does no caching
801on its own. If you want DNS caching, you currently have to provide
802your own default resolver (by storing a suitable resolver object in
803C<$AnyEvent::DNS::RESOLVER>).
804
745=head2 GLOBAL FUNCTIONS AND VARIABLES 805=head2 GLOBAL FUNCTIONS AND VARIABLES
746 806
747=over 4 807=over 4
748 808
749=item AnyEvent::HTTP::set_proxy "proxy-url" 809=item AnyEvent::HTTP::set_proxy "proxy-url"
… …
752string of the form C<http://host:port> (optionally C<https:...>), croaks 812string of the form C<http://host:port> (optionally C<https:...>), croaks
753otherwise. 813otherwise.
754 814
755To clear an already-set proxy, use C<undef>. 815To clear an already-set proxy, use C<undef>.
756 816
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.
826
757=item $AnyEvent::HTTP::MAX_RECURSE 827=item $AnyEvent::HTTP::MAX_RECURSE
758 828
759The default value for the C<recurse> request parameter (default: C<10>). 829The default value for the C<recurse> request parameter (default: C<10>).
760 830
761=item $AnyEvent::HTTP::USERAGENT 831=item $AnyEvent::HTTP::USERAGENT
… …
779connections. This number of can be useful for load-leveling. 849connections. This number of can be useful for load-leveling.
780 850
781=back 851=back
782 852
783=cut 853=cut
854
855our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
856our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat);
857
858sub format_date($) {
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, $_, $y);
892 }
893 }
894
895 undef
896}
784 897
785sub set_proxy($) { 898sub set_proxy($) {
786 if (length $_[0]) { 899 if (length $_[0]) {
787 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix 900 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
788 or Carp::croak "$_[0]: invalid proxy URL"; 901 or Carp::croak "$_[0]: invalid proxy URL";
… …
795# initialise proxy from environment 908# initialise proxy from environment
796eval { 909eval {
797 set_proxy $ENV{http_proxy}; 910 set_proxy $ENV{http_proxy};
798}; 911};
799 912
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 };
968
800=head1 SEE ALSO 969=head1 SEE ALSO
801 970
802L<AnyEvent>. 971L<AnyEvent>.
803 972
804=head1 AUTHOR 973=head1 AUTHOR

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