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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.47 by root, Wed Aug 5 16:07:48 2009 UTC vs.
Revision 1.59 by root, Wed Dec 29 23:59:36 2010 UTC

… …
41use strict; 41use strict;
42no warnings; 42no warnings;
43 43
44use Errno (); 44use Errno ();
45 45
46use AnyEvent 4.8 (); 46use AnyEvent 5.0 ();
47use AnyEvent::Util (); 47use AnyEvent::Util ();
48use AnyEvent::Socket ();
49use AnyEvent::Handle (); 48use AnyEvent::Handle ();
50 49
51use base Exporter::; 50use base Exporter::;
52 51
53our $VERSION = '1.41'; 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,
… …
140 151
141The request headers to use. Currently, C<http_request> may provide its 152The request headers to use. Currently, C<http_request> may provide its
142own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers 153own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
143and will provide defaults for C<User-Agent:> and C<Referer:> (this can be 154and will provide defaults for C<User-Agent:> and C<Referer:> (this can be
144suppressed by using C<undef> for these headers in which case they won't be 155suppressed by using C<undef> for these headers in which case they won't be
145send at all). 156sent at all).
146 157
147=item timeout => $seconds 158=item timeout => $seconds
148 159
149The time-out to use for various stages - each connect attempt will reset 160The time-out to use for various stages - each connect attempt will reset
150the timeout, as will read or write activity. Default timeout is 5 minutes. 161the timeout, as will read or write activity, i.e. this is not an overall
162timeout.
163
164Default timeout is 5 minutes.
151 165
152=item proxy => [$host, $port[, $scheme]] or undef 166=item proxy => [$host, $port[, $scheme]] or undef
153 167
154Use the given http proxy for all requests. If not specified, then the 168Use the given http proxy for all requests. If not specified, then the
155default proxy (as specified by C<$ENV{http_proxy}>) is used. 169default proxy (as specified by C<$ENV{http_proxy}>) is used.
… …
187verification, highest compatibility) and high-security (CA and common-name 201verification, highest compatibility) and high-security (CA and common-name
188verification) TLS context. 202verification) TLS context.
189 203
190The default for this option is C<low>, which could be interpreted as "give 204The default for this option is C<low>, which could be interpreted as "give
191me the page, no matter what". 205me the page, no matter what".
206
207=item on_prepare => $callback->($fh)
208
209In rare cases you need to "tune" the socket before it is used to
210connect (for exmaple, to bind it on a given IP address). This parameter
211overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
212and behaves exactly the same way (e.g. it has to provide a
213timeout). See the description for the C<$prepare_cb> argument of
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.
222
223There are probably lots of weird uses for this function, starting from
224tracing the hosts C<http_request> actually tries to connect, to (inexact
225but fast) host => IP address caching or even socks protocol support.
192 226
193=item on_header => $callback->($headers) 227=item on_header => $callback->($headers)
194 228
195When specified, this callback will be called with the header hash as soon 229When specified, this callback will be called with the header hash as soon
196as headers have been successfully received from the remote server (not on 230as headers have been successfully received from the remote server (not on
… …
314 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 348 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
315 349
316 _slot_schedule $_[0]; 350 _slot_schedule $_[0];
317} 351}
318 352
319our $qr_nl = qr{\015?\012};
320our $qr_nlnl = qr{(?<![^\012])\015?\012}; 353our $qr_nlnl = qr{(?<![^\012])\015?\012};
321 354
322our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; 355our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
323our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; 356our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
324 357
… …
337 while (my ($k, $v) = each %$hdr) { 370 while (my ($k, $v) = each %$hdr) {
338 $hdr{lc $k} = $v; 371 $hdr{lc $k} = $v;
339 } 372 }
340 } 373 }
341 374
375 # pseudo headers for all subsequent responses
376 my @pseudo = (URL => $url);
377 push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
378
342 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 379 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
343 380
344 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) 381 return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })
345 if $recurse < 0; 382 if $recurse < 0;
346 383
347 my $proxy = $arg{proxy} || $PROXY; 384 my $proxy = $arg{proxy} || $PROXY;
348 my $timeout = $arg{timeout} || $TIMEOUT; 385 my $timeout = $arg{timeout} || $TIMEOUT;
349 386
350 my ($uscheme, $uauthority, $upath, $query, $fragment) = 387 my ($uscheme, $uauthority, $upath, $query, $fragment) =
351 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 388 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
352 389
353 $uscheme = lc $uscheme; 390 $uscheme = lc $uscheme;
354 391
355 my $uport = $uscheme eq "http" ? 80 392 my $uport = $uscheme eq "http" ? 80
356 : $uscheme eq "https" ? 443 393 : $uscheme eq "https" ? 443
357 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url }); 394 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", @pseudo });
358 395
359 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 396 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
360 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); 397 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });
361 398
362 my $uhost = $1; 399 my $uhost = $1;
363 $uport = $2 if defined $2; 400 $uport = $2 if defined $2;
364 401
365 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"; 402 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
403 unless exists $hdr{host};
366 404
367 $uhost =~ s/^\[(.*)\]$/$1/; 405 $uhost =~ s/^\[(.*)\]$/$1/;
368 $upath .= "?$query" if length $query; 406 $upath .= $query if length $query;
369 407
370 $upath =~ s%^/?%/%; 408 $upath =~ s%^/?%/%;
371 409
372 # cookie processing 410 # cookie processing
373 if (my $jar = $arg{cookie_jar}) { 411 if (my $jar = $arg{cookie_jar}) {
… …
416 454
417 # leave out fragment and query string, just a heuristic 455 # leave out fragment and query string, just a heuristic
418 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer}; 456 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
419 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"}; 457 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};
420 458
421 $hdr{"content-length"} = length $arg{body}; 459 $hdr{"content-length"} = length $arg{body}
460 if length $arg{body} || $method ne "GET";
422 461
423 my %state = (connect_guard => 1); 462 my %state = (connect_guard => 1);
424 463
425 _get_slot $uhost, sub { 464 _get_slot $uhost, sub {
426 $state{slot_guard} = shift; 465 $state{slot_guard} = shift;
427 466
428 return unless $state{connect_guard}; 467 return unless $state{connect_guard};
429 468
430 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 469 my $tcp_connect = $arg{tcp_connect}
470 || do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect };
471
472 $state{connect_guard} = $tcp_connect->(
473 $rhost,
474 $rport,
475 sub {
431 $state{fh} = shift 476 $state{fh} = shift
432 or do { 477 or do {
433 my $err = "$!"; 478 my $err = "$!";
434 %state = (); 479 %state = ();
435 return $cb->(undef, { Status => 599, Reason => $err, URL => $url }); 480 return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
436 }; 481 };
437 482
438 pop; # free memory, save a tree 483 pop; # free memory, save a tree
439 484
440 return unless delete $state{connect_guard}; 485 return unless delete $state{connect_guard};
441 486
442 # get handle 487 # get handle
443 $state{handle} = new AnyEvent::Handle 488 $state{handle} = new AnyEvent::Handle
444 fh => $state{fh}, 489 fh => $state{fh},
490 peername => $rhost,
491 tls_ctx => $arg{tls_ctx},
492 # these need to be reconfigured on keepalive handles
445 timeout => $timeout, 493 timeout => $timeout,
446 peername => $rhost, 494 on_error => sub {
447 tls_ctx => $arg{tls_ctx}; 495 %state = ();
496 $cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
497 },
498 on_eof => sub {
499 %state = ();
500 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
501 },
502 ;
448 503
449 # limit the number of persistent connections 504 # limit the number of persistent connections
450 # keepalive not yet supported 505 # keepalive not yet supported
451 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 506# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
452 ++$KA_COUNT{$_[1]}; 507# ++$KA_COUNT{$_[1]};
453 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 508# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
454 --$KA_COUNT{$_[1]} 509# --$KA_COUNT{$_[1]}
455 }; 510# };
456 $hdr{connection} = "keep-alive"; 511# $hdr{connection} = "keep-alive";
457 } else { 512# } else {
458 delete $hdr{connection}; 513 delete $hdr{connection};
459 } 514# }
460 515
461 # (re-)configure handle
462 $state{handle}->on_error (sub {
463 %state = ();
464 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
465 });
466 $state{handle}->on_eof (sub {
467 %state = ();
468 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
469 });
470
471 $state{handle}->starttls ("connect") if $rscheme eq "https"; 516 $state{handle}->starttls ("connect") if $rscheme eq "https";
472 517
473 # handle actual, non-tunneled, request 518 # handle actual, non-tunneled, request
474 my $handle_actual_request = sub { 519 my $handle_actual_request = sub {
475 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; 520 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
476 521
477 # send request 522 # send request
478 $state{handle}->push_write ( 523 $state{handle}->push_write (
479 "$method $rpath HTTP/1.0\015\012" 524 "$method $rpath HTTP/1.0\015\012"
480 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) 525 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
481 . "\015\012" 526 . "\015\012"
482 . (delete $arg{body}) 527 . (delete $arg{body})
483 );
484
485 %hdr = (); # reduce memory usage, save a kitten
486
487 # status line
488 $state{handle}->push_read (line => $qr_nl, sub {
489 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
490 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
491
492 my %hdr = ( # response headers
493 HTTPVersion => ",$1",
494 Status => ",$2",
495 Reason => ",$3",
496 URL => ",$url"
497 ); 528 );
498 529
499 # headers, could be optimized a bit 530 # return if error occured during push_write()
531 return unless %state;
532
533 %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
534
535 # status line and headers
500 $state{handle}->unshift_read (line => $qr_nlnl, sub { 536 $state{handle}->push_read (line => $qr_nlnl, sub {
501 for ("$_[1]") { 537 for ("$_[1]") {
502 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 538 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
539
540 /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc
541 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response", @pseudo }));
542
543 push @pseudo,
544 HTTPVersion => $1,
545 Status => $2,
546 Reason => $3,
547 ;
503 548
504 # things seen, not parsed: 549 # things seen, not parsed:
505 # p3pP="NON CUR OTPi OUR NOR UNI" 550 # p3pP="NON CUR OTPi OUR NOR UNI"
506 551
507 $hdr{lc $1} .= ",$2" 552 $hdr{lc $1} .= ",$2"
… …
511 ((?: [^\012]+ | \012[\011\040] )*) 556 ((?: [^\012]+ | \012[\011\040] )*)
512 \012 557 \012
513 /gxc; 558 /gxc;
514 559
515 /\G$/ 560 /\G$/
516 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url })); 561 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", @pseudo }));
517 } 562 }
518 563
564 # remove the "," prefix we added to all headers above
519 substr $_, 0, 1, "" 565 substr $_, 0, 1, ""
520 for values %hdr; 566 for values %hdr;
567
568 # patch in all pseudo headers
569 %hdr = (%hdr, @pseudo);
521 570
522 # redirect handling 571 # redirect handling
523 # microsoft and other shitheads don't give a shit for following standards, 572 # microsoft and other shitheads don't give a shit for following standards,
524 # try to support some common forms of broken Location headers. 573 # try to support some common forms of broken Location headers.
525 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 574 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
… …
536 } 585 }
537 586
538 my $redirect; 587 my $redirect;
539 588
540 if ($recurse) { 589 if ($recurse) {
541 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 590 my $status = $hdr{Status};
542 # apparently, mozilla et al. just change POST to GET here 591
543 # more research is needed before we do the same 592 # industry standard is to redirect POST as GET for
544 $redirect = 1; 593 # 301, 302 and 303, in contrast to http/1.0 and 1.1.
545 } elsif ($hdr{Status} == 303) { 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) {
546 # even http/1.1 is unclear on how to mutate the method 598 # HTTP/1.1 is unclear on how to mutate the method
547 $method = "GET" unless $method eq "HEAD"; 599 $method = "GET" unless $method eq "HEAD";
548 $redirect = 1; 600 $redirect = 1;
549 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 601 } elsif ($status == 307) {
550 $redirect = 1; 602 $redirect = 1;
551 } 603 }
552 } 604 }
553 605
554 my $finish = sub { 606 my $finish = sub {
… …
607 659
608 if ($redirect && exists $hdr{location}) { 660 if ($redirect && exists $hdr{location}) {
609 # we ignore any errors, as it is very common to receive 661 # we ignore any errors, as it is very common to receive
610 # Content-Length != 0 but no actual body 662 # Content-Length != 0 but no actual body
611 # we also access %hdr, as $_[1] might be an erro 663 # we also access %hdr, as $_[1] might be an erro
612 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); 664 http_request (
665 $method => $hdr{location},
666 %arg,
667 recurse => $recurse - 1,
668 Redirect => \@_,
669 $cb);
613 } else { 670 } else {
614 $cb->($_[0], $_[1]); 671 $cb->($_[0], $_[1]);
615 } 672 }
616 }; 673 };
617 674
618 my $len = $hdr{"content-length"}; 675 my $len = $hdr{"content-length"};
619 676
620 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { 677 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
621 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url }); 678 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
622 } elsif ( 679 } elsif (
623 $hdr{Status} =~ /^(?:1..|[23]04)$/ 680 $hdr{Status} =~ /^(?:1..|[23]04)$/
624 or $method eq "HEAD" 681 or $method eq "HEAD"
625 or (defined $len && !$len) 682 or (defined $len && !$len)
626 ) { 683 ) {
… …
629 } else { 686 } else {
630 # body handling, four different code paths 687 # body handling, four different code paths
631 # for want_body_handle, on_body (2x), normal (2x) 688 # for want_body_handle, on_body (2x), normal (2x)
632 # we might read too much here, but it does not matter yet (no pers. connections) 689 # we might read too much here, but it does not matter yet (no pers. connections)
633 if (!$redirect && $arg{want_body_handle}) { 690 if (!$redirect && $arg{want_body_handle}) {
634 $_[0]->on_eof (undef); 691 $_[0]->on_eof (undef);
635 $_[0]->on_error (undef); 692 $_[0]->on_error (undef);
636 $_[0]->on_read (undef); 693 $_[0]->on_read (undef);
637 694
638 $finish->(delete $state{handle}, \%hdr); 695 $finish->(delete $state{handle}, \%hdr);
639 696
640 } elsif ($arg{on_body}) { 697 } elsif ($arg{on_body}) {
641 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 698 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
642 if ($len) { 699 if ($len) {
643 $_[0]->on_eof (undef); 700 $_[0]->on_eof (undef);
644 $_[0]->on_read (sub { 701 $_[0]->on_read (sub {
645 $len -= length $_[0]{rbuf}; 702 $len -= length $_[0]{rbuf};
646 703
647 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 704 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
648 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url }); 705 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
649 706
650 $len > 0 707 $len > 0
651 or $finish->("", \%hdr); 708 or $finish->("", \%hdr);
652 }); 709 });
653 } else { 710 } else {
654 $_[0]->on_eof (sub { 711 $_[0]->on_eof (sub {
655 $finish->("", \%hdr); 712 $finish->("", \%hdr);
656 }); 713 });
657 $_[0]->on_read (sub { 714 $_[0]->on_read (sub {
658 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 715 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
659 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url }); 716 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
660 }); 717 });
661 } 718 }
662 } else { 719 } else {
663 $_[0]->on_eof (undef); 720 $_[0]->on_eof (undef);
664 721
665 if ($len) { 722 if ($len) {
666 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 723 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
667 $_[0]->on_read (sub { 724 $_[0]->on_read (sub {
668 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr) 725 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
669 if $len <= length $_[0]{rbuf}; 726 if $len <= length $_[0]{rbuf};
670 }); 727 });
671 } else { 728 } else {
672 $_[0]->on_error (sub { 729 $_[0]->on_error (sub {
673 $! == Errno::EPIPE || !$! 730 ($! == Errno::EPIPE || !$!)
674 ? $finish->(delete $_[0]{rbuf}, \%hdr) 731 ? $finish->(delete $_[0]{rbuf}, \%hdr)
675 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 732 : $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
676 }); 733 });
677 $_[0]->on_read (sub { }); 734 $_[0]->on_read (sub { });
678 } 735 }
679 } 736 }
680 } 737 }
681 }); 738 });
682 }); 739 };
683 };
684 740
685 # now handle proxy-CONNECT method 741 # now handle proxy-CONNECT method
686 if ($proxy && $uscheme eq "https") { 742 if ($proxy && $uscheme eq "https") {
687 # oh dear, we have to wrap it into a connect request 743 # oh dear, we have to wrap it into a connect request
688 744
689 # maybe re-use $uauthority with patched port? 745 # maybe re-use $uauthority with patched port?
690 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); 746 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
691 $state{handle}->push_read (line => $qr_nlnl, sub { 747 $state{handle}->push_read (line => $qr_nlnl, sub {
692 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 748 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
693 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url })); 749 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", @pseudo }));
694 750
695 if ($2 == 200) { 751 if ($2 == 200) {
696 $rpath = $upath; 752 $rpath = $upath;
697 &$handle_actual_request; 753 &$handle_actual_request;
698 } else { 754 } else {
699 %state = (); 755 %state = ();
700 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 756 $cb->(undef, { Status => $2, Reason => $3, @pseudo });
757 }
701 } 758 });
702 });
703 } else { 759 } else {
704 &$handle_actual_request; 760 &$handle_actual_request;
761 }
762
705 } 763 },
706 764 $arg{on_prepare} || sub { $timeout }
707 }, sub {
708 $timeout
709 }; 765 );
710 }; 766 };
711 767
712 defined wantarray && AnyEvent::Util::guard { %state = () } 768 defined wantarray && AnyEvent::Util::guard { %state = () }
713} 769}
714 770
… …
728 &http_request 784 &http_request
729} 785}
730 786
731=back 787=back
732 788
789=head2 DNS CACHING
790
791AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
792the actual connection, which in turn uses AnyEvent::DNS to resolve
793hostnames. The latter is a simple stub resolver and does no caching
794on its own. If you want DNS caching, you currently have to provide
795your own default resolver (by storing a suitable resolver object in
796C<$AnyEvent::DNS::RESOLVER>).
797
733=head2 GLOBAL FUNCTIONS AND VARIABLES 798=head2 GLOBAL FUNCTIONS AND VARIABLES
734 799
735=over 4 800=over 4
736 801
737=item AnyEvent::HTTP::set_proxy "proxy-url" 802=item AnyEvent::HTTP::set_proxy "proxy-url"
738 803
739Sets the default proxy server to use. The proxy-url must begin with a 804Sets the default proxy server to use. The proxy-url must begin with a
740string of the form C<http://host:port> (optionally C<https:...>). 805string of the form C<http://host:port> (optionally C<https:...>), croaks
806otherwise.
807
808To clear an already-set proxy, use C<undef>.
741 809
742=item $AnyEvent::HTTP::MAX_RECURSE 810=item $AnyEvent::HTTP::MAX_RECURSE
743 811
744The default value for the C<recurse> request parameter (default: C<10>). 812The default value for the C<recurse> request parameter (default: C<10>).
745 813
… …
766=back 834=back
767 835
768=cut 836=cut
769 837
770sub set_proxy($) { 838sub set_proxy($) {
839 if (length $_[0]) {
771 $PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix; 840 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
841 or Carp::croak "$_[0]: invalid proxy URL";
842 $PROXY = [$2, $3 || 3128, $1]
843 } else {
844 undef $PROXY;
845 }
772} 846}
773 847
774# initialise proxy from environment 848# initialise proxy from environment
849eval {
775set_proxy $ENV{http_proxy}; 850 set_proxy $ENV{http_proxy};
851};
776 852
777=head1 SEE ALSO 853=head1 SEE ALSO
778 854
779L<AnyEvent>. 855L<AnyEvent>.
780 856

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