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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.50 by root, Tue Aug 11 13:20:42 2009 UTC vs.
Revision 1.60 by root, Thu Dec 30 02:56:28 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 = '1.42'; 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,
… …
145sent 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.
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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, 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.
192 227
193=item on_header => $callback->($headers) 228=item on_header => $callback->($headers)
194 229
195When 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
196as headers have been successfully received from the remote server (not on 231as headers have been successfully received from the remote server (not on
… …
314 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 349 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
315 350
316 _slot_schedule $_[0]; 351 _slot_schedule $_[0];
317} 352}
318 353
319our $qr_nl = qr{\015?\012};
320our $qr_nlnl = qr{(?<![^\012])\015?\012}; 354our $qr_nlnl = qr{(?<![^\012])\015?\012};
321 355
322our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; 356our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
323our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; 357our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
324 358
… …
337 while (my ($k, $v) = each %$hdr) { 371 while (my ($k, $v) = each %$hdr) {
338 $hdr{lc $k} = $v; 372 $hdr{lc $k} = $v;
339 } 373 }
340 } 374 }
341 375
376 # pseudo headers for all subsequent responses
377 my @pseudo = (URL => $url);
378 push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
379
342 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 380 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
343 381
344 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) 382 return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })
345 if $recurse < 0; 383 if $recurse < 0;
346 384
347 my $proxy = $arg{proxy} || $PROXY; 385 my $proxy = $arg{proxy} || $PROXY;
348 my $timeout = $arg{timeout} || $TIMEOUT; 386 my $timeout = $arg{timeout} || $TIMEOUT;
349 387
350 my ($uscheme, $uauthority, $upath, $query, $fragment) = 388 my ($uscheme, $uauthority, $upath, $query, $fragment) =
351 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 389 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
352 390
353 $uscheme = lc $uscheme; 391 $uscheme = lc $uscheme;
354 392
355 my $uport = $uscheme eq "http" ? 80 393 my $uport = $uscheme eq "http" ? 80
356 : $uscheme eq "https" ? 443 394 : $uscheme eq "https" ? 443
357 : 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 });
358 396
359 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 397 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
360 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); 398 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });
361 399
362 my $uhost = $1; 400 my $uhost = $1;
363 $uport = $2 if defined $2; 401 $uport = $2 if defined $2;
364 402
365 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"; 403 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
404 unless exists $hdr{host};
366 405
367 $uhost =~ s/^\[(.*)\]$/$1/; 406 $uhost =~ s/^\[(.*)\]$/$1/;
368 $upath .= "?$query" if length $query; 407 $upath .= $query if length $query;
369 408
370 $upath =~ s%^/?%/%; 409 $upath =~ s%^/?%/%;
371 410
372 # cookie processing 411 # cookie processing
373 if (my $jar = $arg{cookie_jar}) { 412 if (my $jar = $arg{cookie_jar}) {
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416 455
417 # leave out fragment and query string, just a heuristic 456 # leave out fragment and query string, just a heuristic
418 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer}; 457 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
419 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"}; 458 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};
420 459
421 $hdr{"content-length"} = length $arg{body}; 460 $hdr{"content-length"} = length $arg{body}
461 if length $arg{body} || $method ne "GET";
422 462
423 my %state = (connect_guard => 1); 463 my %state = (connect_guard => 1);
424 464
425 _get_slot $uhost, sub { 465 _get_slot $uhost, sub {
426 $state{slot_guard} = shift; 466 $state{slot_guard} = shift;
427 467
428 return unless $state{connect_guard}; 468 return unless $state{connect_guard};
429 469
430 $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 {
431 $state{fh} = shift 477 $state{fh} = shift
432 or do { 478 or do {
433 my $err = "$!"; 479 my $err = "$!";
434 %state = (); 480 %state = ();
435 return $cb->(undef, { Status => 599, Reason => $err, URL => $url }); 481 return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
436 }; 482 };
437 483
438 pop; # free memory, save a tree 484 pop; # free memory, save a tree
439 485
440 return unless delete $state{connect_guard}; 486 return unless delete $state{connect_guard};
441 487
442 # get handle 488 # get handle
443 $state{handle} = new AnyEvent::Handle 489 $state{handle} = new AnyEvent::Handle
444 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
445 timeout => $timeout, 494 timeout => $timeout,
446 peername => $rhost, 495 on_error => sub {
447 tls_ctx => $arg{tls_ctx}; 496 %state = ();
497 $cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
498 },
499 on_eof => sub {
500 %state = ();
501 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
502 },
503 ;
448 504
449 # limit the number of persistent connections 505 # limit the number of persistent connections
450 # keepalive not yet supported 506 # keepalive not yet supported
451 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 507# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
452 ++$KA_COUNT{$_[1]}; 508# ++$KA_COUNT{$_[1]};
453 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 509# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
454 --$KA_COUNT{$_[1]} 510# --$KA_COUNT{$_[1]}
455 }; 511# };
456 $hdr{connection} = "keep-alive"; 512# $hdr{connection} = "keep-alive";
457 } else { 513# } else {
458 delete $hdr{connection}; 514 delete $hdr{connection};
459 } 515# }
460 516
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"; 517 $state{handle}->starttls ("connect") if $rscheme eq "https";
472 518
473 # handle actual, non-tunneled, request 519 # handle actual, non-tunneled, request
474 my $handle_actual_request = sub { 520 my $handle_actual_request = sub {
475 $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};
476 522
477 # send request 523 # send request
478 $state{handle}->push_write ( 524 $state{handle}->push_write (
479 "$method $rpath HTTP/1.0\015\012" 525 "$method $rpath HTTP/1.0\015\012"
480 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) 526 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
481 . "\015\012" 527 . "\015\012"
482 . (delete $arg{body}) 528 . (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 ); 529 );
498 530
499 # 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
500 $state{handle}->unshift_read (line => $qr_nlnl, sub { 537 $state{handle}->push_read (line => $qr_nlnl, sub {
501 for ("$_[1]") { 538 for ("$_[1]") {
502 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 ;
503 549
504 # things seen, not parsed: 550 # things seen, not parsed:
505 # p3pP="NON CUR OTPi OUR NOR UNI" 551 # p3pP="NON CUR OTPi OUR NOR UNI"
506 552
507 $hdr{lc $1} .= ",$2" 553 $hdr{lc $1} .= ",$2"
… …
511 ((?: [^\012]+ | \012[\011\040] )*) 557 ((?: [^\012]+ | \012[\011\040] )*)
512 \012 558 \012
513 /gxc; 559 /gxc;
514 560
515 /\G$/ 561 /\G$/
516 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 }));
517 } 563 }
518 564
565 # remove the "," prefix we added to all headers above
519 substr $_, 0, 1, "" 566 substr $_, 0, 1, ""
520 for values %hdr; 567 for values %hdr;
568
569 # patch in all pseudo headers
570 %hdr = (%hdr, @pseudo);
521 571
522 # redirect handling 572 # redirect handling
523 # microsoft and other shitheads don't give a shit for following standards, 573 # microsoft and other shitheads don't give a shit for following standards,
524 # try to support some common forms of broken Location headers. 574 # try to support some common forms of broken Location headers.
525 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 575 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
… …
536 } 586 }
537 587
538 my $redirect; 588 my $redirect;
539 589
540 if ($recurse) { 590 if ($recurse) {
541 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 591 my $status = $hdr{Status};
542 # apparently, mozilla et al. just change POST to GET here 592
543 # more research is needed before we do the same 593 # industry standard is to redirect POST as GET for
544 $redirect = 1; 594 # 301, 302 and 303, in contrast to http/1.0 and 1.1.
545 } elsif ($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) {
546 # even http/1.1 is unclear on how to mutate the method 599 # HTTP/1.1 is unclear on how to mutate the method
547 $method = "GET" unless $method eq "HEAD"; 600 $method = "GET" unless $method eq "HEAD";
548 $redirect = 1; 601 $redirect = 1;
549 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 602 } elsif ($status == 307) {
550 $redirect = 1; 603 $redirect = 1;
551 } 604 }
552 } 605 }
553 606
554 my $finish = sub { 607 my $finish = sub {
… …
607 660
608 if ($redirect && exists $hdr{location}) { 661 if ($redirect && exists $hdr{location}) {
609 # we ignore any errors, as it is very common to receive 662 # we ignore any errors, as it is very common to receive
610 # Content-Length != 0 but no actual body 663 # Content-Length != 0 but no actual body
611 # we also access %hdr, as $_[1] might be an erro 664 # we also access %hdr, as $_[1] might be an erro
612 http_request ($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);
613 } else { 671 } else {
614 $cb->($_[0], $_[1]); 672 $cb->($_[0], $_[1]);
615 } 673 }
616 }; 674 };
617 675
618 my $len = $hdr{"content-length"}; 676 my $len = $hdr{"content-length"};
619 677
620 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { 678 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
621 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url }); 679 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
622 } elsif ( 680 } elsif (
623 $hdr{Status} =~ /^(?:1..|[23]04)$/ 681 $hdr{Status} =~ /^(?:1..|[23]04)$/
624 or $method eq "HEAD" 682 or $method eq "HEAD"
625 or (defined $len && !$len) 683 or (defined $len && !$len)
626 ) { 684 ) {
… …
629 } else { 687 } else {
630 # body handling, four different code paths 688 # body handling, four different code paths
631 # for want_body_handle, on_body (2x), normal (2x) 689 # 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) 690 # we might read too much here, but it does not matter yet (no pers. connections)
633 if (!$redirect && $arg{want_body_handle}) { 691 if (!$redirect && $arg{want_body_handle}) {
634 $_[0]->on_eof (undef); 692 $_[0]->on_eof (undef);
635 $_[0]->on_error (undef); 693 $_[0]->on_error (undef);
636 $_[0]->on_read (undef); 694 $_[0]->on_read (undef);
637 695
638 $finish->(delete $state{handle}, \%hdr); 696 $finish->(delete $state{handle}, \%hdr);
639 697
640 } elsif ($arg{on_body}) { 698 } elsif ($arg{on_body}) {
641 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 699 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
642 if ($len) { 700 if ($len) {
643 $_[0]->on_eof (undef); 701 $_[0]->on_eof (undef);
644 $_[0]->on_read (sub { 702 $_[0]->on_read (sub {
645 $len -= length $_[0]{rbuf}; 703 $len -= length $_[0]{rbuf};
646 704
647 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 705 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
648 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 });
649 707
650 $len > 0 708 $len > 0
651 or $finish->("", \%hdr); 709 or $finish->("", \%hdr);
652 }); 710 });
653 } else { 711 } else {
654 $_[0]->on_eof (sub { 712 $_[0]->on_eof (sub {
655 $finish->("", \%hdr); 713 $finish->("", \%hdr);
656 }); 714 });
657 $_[0]->on_read (sub { 715 $_[0]->on_read (sub {
658 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 716 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
659 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 });
660 }); 718 });
661 } 719 }
662 } else { 720 } else {
663 $_[0]->on_eof (undef); 721 $_[0]->on_eof (undef);
664 722
665 if ($len) { 723 if ($len) {
666 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 724 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
667 $_[0]->on_read (sub { 725 $_[0]->on_read (sub {
668 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr) 726 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
669 if $len <= length $_[0]{rbuf}; 727 if $len <= length $_[0]{rbuf};
670 }); 728 });
671 } else { 729 } else {
672 $_[0]->on_error (sub { 730 $_[0]->on_error (sub {
673 $! == Errno::EPIPE || !$! 731 ($! == Errno::EPIPE || !$!)
674 ? $finish->(delete $_[0]{rbuf}, \%hdr) 732 ? $finish->(delete $_[0]{rbuf}, \%hdr)
675 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 733 : $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
676 }); 734 });
677 $_[0]->on_read (sub { }); 735 $_[0]->on_read (sub { });
678 } 736 }
679 } 737 }
680 } 738 }
681 }); 739 });
682 }); 740 };
683 };
684 741
685 # now handle proxy-CONNECT method 742 # now handle proxy-CONNECT method
686 if ($proxy && $uscheme eq "https") { 743 if ($proxy && $uscheme eq "https") {
687 # oh dear, we have to wrap it into a connect request 744 # oh dear, we have to wrap it into a connect request
688 745
689 # maybe re-use $uauthority with patched port? 746 # 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"); 747 $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 { 748 $state{handle}->push_read (line => $qr_nlnl, sub {
692 $_[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
693 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 }));
694 751
695 if ($2 == 200) { 752 if ($2 == 200) {
696 $rpath = $upath; 753 $rpath = $upath;
697 &$handle_actual_request; 754 &$handle_actual_request;
698 } else { 755 } else {
699 %state = (); 756 %state = ();
700 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 757 $cb->(undef, { Status => $2, Reason => $3, @pseudo });
758 }
701 } 759 });
702 });
703 } else { 760 } else {
704 &$handle_actual_request; 761 &$handle_actual_request;
762 }
763
705 } 764 },
706
707 }, $arg{on_prepare} || sub { $timeout }; 765 $arg{on_prepare} || sub { $timeout }
766 );
708 }; 767 };
709 768
710 defined wantarray && AnyEvent::Util::guard { %state = () } 769 defined wantarray && AnyEvent::Util::guard { %state = () }
711} 770}
712 771
… …
726 &http_request 785 &http_request
727} 786}
728 787
729=back 788=back
730 789
790=head2 DNS CACHING
791
792AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
793the actual connection, which in turn uses AnyEvent::DNS to resolve
794hostnames. The latter is a simple stub resolver and does no caching
795on its own. If you want DNS caching, you currently have to provide
796your own default resolver (by storing a suitable resolver object in
797C<$AnyEvent::DNS::RESOLVER>).
798
731=head2 GLOBAL FUNCTIONS AND VARIABLES 799=head2 GLOBAL FUNCTIONS AND VARIABLES
732 800
733=over 4 801=over 4
734 802
735=item AnyEvent::HTTP::set_proxy "proxy-url" 803=item AnyEvent::HTTP::set_proxy "proxy-url"
736 804
737Sets the default proxy server to use. The proxy-url must begin with a 805Sets the default proxy server to use. The proxy-url must begin with a
738string of the form C<http://host:port> (optionally C<https:...>). 806string of the form C<http://host:port> (optionally C<https:...>), croaks
807otherwise.
808
809To clear an already-set proxy, use C<undef>.
739 810
740=item $AnyEvent::HTTP::MAX_RECURSE 811=item $AnyEvent::HTTP::MAX_RECURSE
741 812
742The default value for the C<recurse> request parameter (default: C<10>). 813The default value for the C<recurse> request parameter (default: C<10>).
743 814
… …
764=back 835=back
765 836
766=cut 837=cut
767 838
768sub set_proxy($) { 839sub set_proxy($) {
840 if (length $_[0]) {
769 $PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix; 841 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
842 or Carp::croak "$_[0]: invalid proxy URL";
843 $PROXY = [$2, $3 || 3128, $1]
844 } else {
845 undef $PROXY;
846 }
770} 847}
771 848
772# initialise proxy from environment 849# initialise proxy from environment
850eval {
773set_proxy $ENV{http_proxy}; 851 set_proxy $ENV{http_proxy};
852};
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 };
774 909
775=head1 SEE ALSO 910=head1 SEE ALSO
776 911
777L<AnyEvent>. 912L<AnyEvent>.
778 913

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