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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.45 by root, Fri Jul 17 16:56:36 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 = '1.4'; 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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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. 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:>. 154and will provide defaults for C<User-Agent:> and C<Referer:> (this can be
155suppressed by using C<undef> for these headers in which case they won't be
156sent at all).
144 157
145=item timeout => $seconds 158=item timeout => $seconds
146 159
147The time-out to use for various stages - each connect attempt will reset 160The time-out to use for various stages - each connect attempt will reset
148the timeout, as will read or write activity. Default timeout is 5 minutes. 161the timeout, as will read or write activity, i.e. this is not an overall
162timeout.
163
164Default timeout is 5 minutes.
149 165
150=item proxy => [$host, $port[, $scheme]] or undef 166=item proxy => [$host, $port[, $scheme]] or undef
151 167
152Use the given http proxy for all requests. If not specified, then the 168Use the given http proxy for all requests. If not specified, then the
153default proxy (as specified by C<$ENV{http_proxy}>) is used. 169default proxy (as specified by C<$ENV{http_proxy}>) is used.
154 170
155C<$scheme> must be either missing or C<http> for HTTP, or C<https> for 171C<$scheme> must be either missing, C<http> for HTTP or C<https> for
156HTTPS. 172HTTPS.
157 173
158=item body => $string 174=item body => $string
159 175
160The request body, usually empty. Will be-sent as-is (future versions of 176The request body, usually empty. Will be-sent as-is (future versions of
… …
185verification, highest compatibility) and high-security (CA and common-name 201verification, highest compatibility) and high-security (CA and common-name
186verification) TLS context. 202verification) TLS context.
187 203
188The 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
189me 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.
190 226
191=item on_header => $callback->($headers) 227=item on_header => $callback->($headers)
192 228
193When 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
194as headers have been successfully received from the remote server (not on 230as headers have been successfully received from the remote server (not on
… …
312 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 348 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
313 349
314 _slot_schedule $_[0]; 350 _slot_schedule $_[0];
315} 351}
316 352
317our $qr_nl = qr<\015?\012>; 353our $qr_nlnl = qr{(?<![^\012])\015?\012};
318our $qr_nlnl = qr<\015?\012\015?\012>;
319 354
320our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; 355our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
321our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; 356our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
322 357
323sub http_request($$@) { 358sub http_request($$@) {
… …
335 while (my ($k, $v) = each %$hdr) { 370 while (my ($k, $v) = each %$hdr) {
336 $hdr{lc $k} = $v; 371 $hdr{lc $k} = $v;
337 } 372 }
338 } 373 }
339 374
375 # pseudo headers for all subsequent responses
376 my @pseudo = (URL => $url);
377 push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
378
340 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 379 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
341 380
342 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) 381 return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })
343 if $recurse < 0; 382 if $recurse < 0;
344 383
345 my $proxy = $arg{proxy} || $PROXY; 384 my $proxy = $arg{proxy} || $PROXY;
346 my $timeout = $arg{timeout} || $TIMEOUT; 385 my $timeout = $arg{timeout} || $TIMEOUT;
347 386
348 my ($uscheme, $uauthority, $upath, $query, $fragment) = 387 my ($uscheme, $uauthority, $upath, $query, $fragment) =
349 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 388 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
350 389
351 $uscheme = lc $uscheme; 390 $uscheme = lc $uscheme;
352 391
353 my $uport = $uscheme eq "http" ? 80 392 my $uport = $uscheme eq "http" ? 80
354 : $uscheme eq "https" ? 443 393 : $uscheme eq "https" ? 443
355 : 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 });
356 395
357 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 396 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
358 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); 397 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });
359 398
360 my $uhost = $1; 399 my $uhost = $1;
361 $uport = $2 if defined $2; 400 $uport = $2 if defined $2;
362 401
363 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"; 402 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
403 unless exists $hdr{host};
364 404
365 $uhost =~ s/^\[(.*)\]$/$1/; 405 $uhost =~ s/^\[(.*)\]$/$1/;
366 $upath .= "?$query" if length $query; 406 $upath .= $query if length $query;
367 407
368 $upath =~ s%^/?%/%; 408 $upath =~ s%^/?%/%;
369 409
370 # cookie processing 410 # cookie processing
371 if (my $jar = $arg{cookie_jar}) { 411 if (my $jar = $arg{cookie_jar}) {
… …
401 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path 441 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
402 442
403 if ($proxy) { 443 if ($proxy) {
404 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); 444 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
405 445
446 $rscheme = "http" unless defined $rscheme;
447
406 # don't support https requests over https-proxy transport, 448 # don't support https requests over https-proxy transport,
407 # can't be done with tls as spec'ed, unless you double-encrypt. 449 # can't be done with tls as spec'ed, unless you double-encrypt.
408 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; 450 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
409 } else { 451 } else {
410 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); 452 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
411 } 453 }
412 454
413 $hdr{"user-agent"} ||= $USERAGENT; 455 # leave out fragment and query string, just a heuristic
414 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic 456 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
457 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};
415 458
416 $hdr{"content-length"} = length $arg{body}; 459 $hdr{"content-length"} = length $arg{body}
460 if length $arg{body} || $method ne "GET";
417 461
418 my %state = (connect_guard => 1); 462 my %state = (connect_guard => 1);
419 463
420 _get_slot $uhost, sub { 464 _get_slot $uhost, sub {
421 $state{slot_guard} = shift; 465 $state{slot_guard} = shift;
422 466
423 return unless $state{connect_guard}; 467 return unless $state{connect_guard};
424 468
425 $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 {
426 $state{fh} = shift 476 $state{fh} = shift
427 or do { 477 or do {
428 my $err = "$!"; 478 my $err = "$!";
429 %state = (); 479 %state = ();
430 return $cb->(undef, { Status => 599, Reason => $err, URL => $url }); 480 return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
431 }; 481 };
432 482
433 pop; # free memory, save a tree 483 pop; # free memory, save a tree
434 484
435 return unless delete $state{connect_guard}; 485 return unless delete $state{connect_guard};
436 486
437 # get handle 487 # get handle
438 $state{handle} = new AnyEvent::Handle 488 $state{handle} = new AnyEvent::Handle
439 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
440 timeout => $timeout, 493 timeout => $timeout,
441 peername => $rhost, 494 on_error => sub {
442 tls_ctx => $arg{tls_ctx}; 495 %state = ();
496 $cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
497 },
498 on_eof => sub {
499 %state = ();
500 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
501 },
502 ;
443 503
444 # limit the number of persistent connections 504 # limit the number of persistent connections
445 # keepalive not yet supported 505 # keepalive not yet supported
446 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 506# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
447 ++$KA_COUNT{$_[1]}; 507# ++$KA_COUNT{$_[1]};
448 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 508# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
449 --$KA_COUNT{$_[1]} 509# --$KA_COUNT{$_[1]}
450 }; 510# };
451 $hdr{connection} = "keep-alive"; 511# $hdr{connection} = "keep-alive";
452 } else { 512# } else {
453 delete $hdr{connection}; 513 delete $hdr{connection};
454 } 514# }
455 515
456 # (re-)configure handle
457 $state{handle}->on_error (sub {
458 %state = ();
459 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
460 });
461 $state{handle}->on_eof (sub {
462 %state = ();
463 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
464 });
465
466 $state{handle}->starttls ("connect") if $rscheme eq "https"; 516 $state{handle}->starttls ("connect") if $rscheme eq "https";
467 517
468 # handle actual, non-tunneled, request 518 # handle actual, non-tunneled, request
469 my $handle_actual_request = sub { 519 my $handle_actual_request = sub {
470 $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};
471 521
472 # send request 522 # send request
473 $state{handle}->push_write ( 523 $state{handle}->push_write (
474 "$method $rpath HTTP/1.0\015\012" 524 "$method $rpath HTTP/1.0\015\012"
475 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) 525 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
476 . "\015\012" 526 . "\015\012"
477 . (delete $arg{body}) 527 . (delete $arg{body})
478 );
479
480 %hdr = (); # reduce memory usage, save a kitten
481
482 # status line
483 $state{handle}->push_read (line => $qr_nl, sub {
484 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
485 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
486
487 my %hdr = ( # response headers
488 HTTPVersion => ",$1",
489 Status => ",$2",
490 Reason => ",$3",
491 URL => ",$url"
492 ); 528 );
493 529
494 # 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
495 $state{handle}->unshift_read (line => $qr_nlnl, sub { 536 $state{handle}->push_read (line => $qr_nlnl, sub {
496 for ("$_[1]\012") { 537 for ("$_[1]") {
497 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 ;
498 548
499 # things seen, not parsed: 549 # things seen, not parsed:
500 # p3pP="NON CUR OTPi OUR NOR UNI" 550 # p3pP="NON CUR OTPi OUR NOR UNI"
501 551
502 $hdr{lc $1} .= ",$2" 552 $hdr{lc $1} .= ",$2"
… …
506 ((?: [^\012]+ | \012[\011\040] )*) 556 ((?: [^\012]+ | \012[\011\040] )*)
507 \012 557 \012
508 /gxc; 558 /gxc;
509 559
510 /\G$/ 560 /\G$/
511 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 }));
512 } 562 }
513 563
564 # remove the "," prefix we added to all headers above
514 substr $_, 0, 1, "" 565 substr $_, 0, 1, ""
515 for values %hdr; 566 for values %hdr;
567
568 # patch in all pseudo headers
569 %hdr = (%hdr, @pseudo);
516 570
517 # redirect handling 571 # redirect handling
518 # microsoft and other shitheads don't give a shit for following standards, 572 # microsoft and other shitheads don't give a shit for following standards,
519 # try to support some common forms of broken Location headers. 573 # try to support some common forms of broken Location headers.
520 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 574 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
… …
531 } 585 }
532 586
533 my $redirect; 587 my $redirect;
534 588
535 if ($recurse) { 589 if ($recurse) {
536 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 590 my $status = $hdr{Status};
537 # apparently, mozilla et al. just change POST to GET here 591
538 # more research is needed before we do the same 592 # industry standard is to redirect POST as GET for
539 $redirect = 1; 593 # 301, 302 and 303, in contrast to http/1.0 and 1.1.
540 } elsif ($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) {
541 # even http/1.1 is unclear on how to mutate the method 598 # HTTP/1.1 is unclear on how to mutate the method
542 $method = "GET" unless $method eq "HEAD"; 599 $method = "GET" unless $method eq "HEAD";
543 $redirect = 1; 600 $redirect = 1;
544 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 601 } elsif ($status == 307) {
545 $redirect = 1; 602 $redirect = 1;
546 } 603 }
547 } 604 }
548 605
549 my $finish = sub { 606 my $finish = sub {
… …
598 655
599 redo if /\G\s*,/gc; 656 redo if /\G\s*,/gc;
600 } 657 }
601 } 658 }
602 659
603 if ($redirect) { 660 if ($redirect && exists $hdr{location}) {
604 # we ignore any errors, as it is very common to receive 661 # we ignore any errors, as it is very common to receive
605 # Content-Length != 0 but no actual body 662 # Content-Length != 0 but no actual body
606 # we also access %hdr, as $_[1] might be an erro 663 # we also access %hdr, as $_[1] might be an erro
607 http_request ($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);
608 } else { 670 } else {
609 $cb->($_[0], $_[1]); 671 $cb->($_[0], $_[1]);
610 } 672 }
611 }; 673 };
612 674
613 my $len = $hdr{"content-length"}; 675 my $len = $hdr{"content-length"};
614 676
615 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { 677 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
616 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url }); 678 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
617 } elsif ( 679 } elsif (
618 $hdr{Status} =~ /^(?:1..|[23]04)$/ 680 $hdr{Status} =~ /^(?:1..|[23]04)$/
619 or $method eq "HEAD" 681 or $method eq "HEAD"
620 or (defined $len && !$len) 682 or (defined $len && !$len)
621 ) { 683 ) {
… …
624 } else { 686 } else {
625 # body handling, four different code paths 687 # body handling, four different code paths
626 # for want_body_handle, on_body (2x), normal (2x) 688 # for want_body_handle, on_body (2x), normal (2x)
627 # 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)
628 if (!$redirect && $arg{want_body_handle}) { 690 if (!$redirect && $arg{want_body_handle}) {
629 $_[0]->on_eof (undef); 691 $_[0]->on_eof (undef);
630 $_[0]->on_error (undef); 692 $_[0]->on_error (undef);
631 $_[0]->on_read (undef); 693 $_[0]->on_read (undef);
632 694
633 $finish->(delete $state{handle}, \%hdr); 695 $finish->(delete $state{handle}, \%hdr);
634 696
635 } elsif ($arg{on_body}) { 697 } elsif ($arg{on_body}) {
636 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 698 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
637 if ($len) { 699 if ($len) {
638 $_[0]->on_eof (undef); 700 $_[0]->on_eof (undef);
639 $_[0]->on_read (sub { 701 $_[0]->on_read (sub {
640 $len -= length $_[0]{rbuf}; 702 $len -= length $_[0]{rbuf};
641 703
642 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 704 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
643 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 });
644 706
645 $len > 0 707 $len > 0
646 or $finish->("", \%hdr); 708 or $finish->("", \%hdr);
647 }); 709 });
648 } else { 710 } else {
649 $_[0]->on_eof (sub { 711 $_[0]->on_eof (sub {
650 $finish->("", \%hdr); 712 $finish->("", \%hdr);
651 }); 713 });
652 $_[0]->on_read (sub { 714 $_[0]->on_read (sub {
653 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 715 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
654 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 });
655 }); 717 });
656 } 718 }
657 } else { 719 } else {
658 $_[0]->on_eof (undef); 720 $_[0]->on_eof (undef);
659 721
660 if ($len) { 722 if ($len) {
661 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 723 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
662 $_[0]->on_read (sub { 724 $_[0]->on_read (sub {
663 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr) 725 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
664 if $len <= length $_[0]{rbuf}; 726 if $len <= length $_[0]{rbuf};
665 }); 727 });
666 } else { 728 } else {
667 $_[0]->on_error (sub { 729 $_[0]->on_error (sub {
668 $! == Errno::EPIPE || !$! 730 ($! == Errno::EPIPE || !$!)
669 ? $finish->(delete $_[0]{rbuf}, \%hdr) 731 ? $finish->(delete $_[0]{rbuf}, \%hdr)
670 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 732 : $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
671 }); 733 });
672 $_[0]->on_read (sub { }); 734 $_[0]->on_read (sub { });
673 } 735 }
674 } 736 }
675 } 737 }
676 }); 738 });
677 }); 739 };
678 };
679 740
680 # now handle proxy-CONNECT method 741 # now handle proxy-CONNECT method
681 if ($proxy && $uscheme eq "https") { 742 if ($proxy && $uscheme eq "https") {
682 # oh dear, we have to wrap it into a connect request 743 # oh dear, we have to wrap it into a connect request
683 744
684 # maybe re-use $uauthority with patched port? 745 # maybe re-use $uauthority with patched port?
685 $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");
686 $state{handle}->push_read (line => $qr_nlnl, sub { 747 $state{handle}->push_read (line => $qr_nlnl, sub {
687 $_[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
688 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 }));
689 750
690 if ($2 == 200) { 751 if ($2 == 200) {
691 $rpath = $upath; 752 $rpath = $upath;
692 &$handle_actual_request; 753 &$handle_actual_request;
693 } else { 754 } else {
694 %state = (); 755 %state = ();
695 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 756 $cb->(undef, { Status => $2, Reason => $3, @pseudo });
757 }
696 } 758 });
697 });
698 } else { 759 } else {
699 &$handle_actual_request; 760 &$handle_actual_request;
761 }
762
700 } 763 },
701 764 $arg{on_prepare} || sub { $timeout }
702 }, sub {
703 $timeout
704 }; 765 );
705 }; 766 };
706 767
707 defined wantarray && AnyEvent::Util::guard { %state = () } 768 defined wantarray && AnyEvent::Util::guard { %state = () }
708} 769}
709 770
… …
723 &http_request 784 &http_request
724} 785}
725 786
726=back 787=back
727 788
789=head2 DNS CACHING
790
791AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
792the actual connection, which in turn uses AnyEvent::DNS to resolve
793hostnames. The latter is a simple stub resolver and does no caching
794on its own. If you want DNS caching, you currently have to provide
795your own default resolver (by storing a suitable resolver object in
796C<$AnyEvent::DNS::RESOLVER>).
797
728=head2 GLOBAL FUNCTIONS AND VARIABLES 798=head2 GLOBAL FUNCTIONS AND VARIABLES
729 799
730=over 4 800=over 4
731 801
732=item AnyEvent::HTTP::set_proxy "proxy-url" 802=item AnyEvent::HTTP::set_proxy "proxy-url"
733 803
734Sets 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
735string 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>.
736 809
737=item $AnyEvent::HTTP::MAX_RECURSE 810=item $AnyEvent::HTTP::MAX_RECURSE
738 811
739The default value for the C<recurse> request parameter (default: C<10>). 812The default value for the C<recurse> request parameter (default: C<10>).
740 813
… …
743The default value for the C<User-Agent> header (the default is 816The default value for the C<User-Agent> header (the default is
744C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 817C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
745 818
746=item $AnyEvent::HTTP::MAX_PER_HOST 819=item $AnyEvent::HTTP::MAX_PER_HOST
747 820
748The maximum number of concurrent conenctions to the same host (identified 821The maximum number of concurrent connections to the same host (identified
749by the hostname). If the limit is exceeded, then the additional requests 822by the hostname). If the limit is exceeded, then the additional requests
750are queued until previous connections are closed. 823are queued until previous connections are closed.
751 824
752The default value for this is C<4>, and it is highly advisable to not 825The default value for this is C<4>, and it is highly advisable to not
753increase it. 826increase it.
… …
761=back 834=back
762 835
763=cut 836=cut
764 837
765sub set_proxy($) { 838sub set_proxy($) {
839 if (length $_[0]) {
766 $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 }
767} 846}
768 847
769# initialise proxy from environment 848# initialise proxy from environment
849eval {
770set_proxy $ENV{http_proxy}; 850 set_proxy $ENV{http_proxy};
851};
771 852
772=head1 SEE ALSO 853=head1 SEE ALSO
773 854
774L<AnyEvent>. 855L<AnyEvent>.
775 856

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