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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.42 by root, Mon Jul 6 00:08:16 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 4.452 (); 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 = '1.12'; 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;
59our $MAX_PERSISTENT = 8; 58our $MAX_PERSISTENT = 8;
60our $PERSISTENT_TIMEOUT = 2; 59our $PERSISTENT_TIMEOUT = 2;
61our $TIMEOUT = 300; 60our $TIMEOUT = 300;
62 61
63# changing these is evil 62# changing these is evil
64our $MAX_PERSISTENT_PER_HOST = 2; 63our $MAX_PERSISTENT_PER_HOST = 0;
65our $MAX_PER_HOST = 4; 64our $MAX_PER_HOST = 4;
66 65
67our $PROXY; 66our $PROXY;
68our $ACTIVE = 0; 67our $ACTIVE = 0;
69 68
… …
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
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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".
190 206
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.
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
195locally-generated errors). 231locally-generated errors).
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221This callback is useful when the data is too large to be held in memory 257This callback is useful when the data is too large to be held in memory
222(so the callback writes it to a file) or when only some information should 258(so the callback writes it to a file) or when only some information should
223be extracted, or when the body should be processed incrementally. 259be extracted, or when the body should be processed incrementally.
224 260
225It is usually preferred over doing your own body handling via 261It is usually preferred over doing your own body handling via
226C<want_body_handle>. 262C<want_body_handle>, but in case of streaming APIs, where HTTP is
263only used to create a connection, C<want_body_handle> is the better
264alternative, as it allows you to install your own event handler, reducing
265resource usage.
227 266
228=item want_body_handle => $enable 267=item want_body_handle => $enable
229 268
230When enabled (default is disabled), the behaviour of AnyEvent::HTTP 269When enabled (default is disabled), the behaviour of AnyEvent::HTTP
231changes considerably: after parsing the headers, and instead of 270changes considerably: after parsing the headers, and instead of
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243This is useful with some push-type services, where, after the initial 282This is useful with some push-type services, where, after the initial
244headers, an interactive protocol is used (typical example would be the 283headers, an interactive protocol is used (typical example would be the
245push-style twitter API which starts a JSON/XML stream). 284push-style twitter API which starts a JSON/XML stream).
246 285
247If you think you need this, first have a look at C<on_body>, to see if 286If you think you need this, first have a look at C<on_body>, to see if
248that doesn'T solve your problem in a better way. 287that doesn't solve your problem in a better way.
249 288
250=back 289=back
251 290
252Example: make a simple HTTP GET request for http://www.nethype.de/ 291Example: make a simple HTTP GET request for http://www.nethype.de/
253 292
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309 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 348 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
310 349
311 _slot_schedule $_[0]; 350 _slot_schedule $_[0];
312} 351}
313 352
314our $qr_nl = qr<\015?\012>; 353our $qr_nlnl = qr{(?<![^\012])\015?\012};
315our $qr_nlnl = qr<\015?\012\015?\012>;
316 354
317our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; 355our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
318our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; 356our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
319 357
320sub http_request($$@) { 358sub http_request($$@) {
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332 while (my ($k, $v) = each %$hdr) { 370 while (my ($k, $v) = each %$hdr) {
333 $hdr{lc $k} = $v; 371 $hdr{lc $k} = $v;
334 } 372 }
335 } 373 }
336 374
375 # pseudo headers for all subsequent responses
376 my @pseudo = (URL => $url);
377 push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
378
337 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 379 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
338 380
339 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) 381 return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })
340 if $recurse < 0; 382 if $recurse < 0;
341 383
342 my $proxy = $arg{proxy} || $PROXY; 384 my $proxy = $arg{proxy} || $PROXY;
343 my $timeout = $arg{timeout} || $TIMEOUT; 385 my $timeout = $arg{timeout} || $TIMEOUT;
344 386
345 my ($uscheme, $uauthority, $upath, $query, $fragment) = 387 my ($uscheme, $uauthority, $upath, $query, $fragment) =
346 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 388 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
347 389
348 $uscheme = lc $uscheme; 390 $uscheme = lc $uscheme;
349 391
350 my $uport = $uscheme eq "http" ? 80 392 my $uport = $uscheme eq "http" ? 80
351 : $uscheme eq "https" ? 443 393 : $uscheme eq "https" ? 443
352 : 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 });
353 395
354 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 396 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
355 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); 397 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });
356 398
357 my $uhost = $1; 399 my $uhost = $1;
358 $uport = $2 if defined $2; 400 $uport = $2 if defined $2;
359 401
402 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
403 unless exists $hdr{host};
404
360 $uhost =~ s/^\[(.*)\]$/$1/; 405 $uhost =~ s/^\[(.*)\]$/$1/;
361 $upath .= "?$query" if length $query; 406 $upath .= $query if length $query;
362 407
363 $upath =~ s%^/?%/%; 408 $upath =~ s%^/?%/%;
364 409
365 # cookie processing 410 # cookie processing
366 if (my $jar = $arg{cookie_jar}) { 411 if (my $jar = $arg{cookie_jar}) {
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396 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path 441 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
397 442
398 if ($proxy) { 443 if ($proxy) {
399 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); 444 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
400 445
446 $rscheme = "http" unless defined $rscheme;
447
401 # don't support https requests over https-proxy transport, 448 # don't support https requests over https-proxy transport,
402 # 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.
403 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; 450 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
404 } else { 451 } else {
405 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); 452 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
406 } 453 }
407 454
408 $hdr{"user-agent"} ||= $USERAGENT; 455 # leave out fragment and query string, just a heuristic
409 $hdr{referer} ||= "$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"};
410 458
411 $hdr{host} = "$uhost:$uport";
412 $hdr{"content-length"} = length $arg{body}; 459 $hdr{"content-length"} = length $arg{body}
460 if length $arg{body} || $method ne "GET";
413 461
414 my %state = (connect_guard => 1); 462 my %state = (connect_guard => 1);
415 463
416 _get_slot $uhost, sub { 464 _get_slot $uhost, sub {
417 $state{slot_guard} = shift; 465 $state{slot_guard} = shift;
418 466
419 return unless $state{connect_guard}; 467 return unless $state{connect_guard};
420 468
421 $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 {
422 $state{fh} = shift 476 $state{fh} = shift
477 or do {
478 my $err = "$!";
479 %state = ();
423 or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url })); 480 return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
481 };
482
424 pop; # free memory, save a tree 483 pop; # free memory, save a tree
425 484
426 return unless delete $state{connect_guard}; 485 return unless delete $state{connect_guard};
427 486
428 # get handle 487 # get handle
429 $state{handle} = new AnyEvent::Handle 488 $state{handle} = new AnyEvent::Handle
430 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
431 timeout => $timeout, 493 timeout => $timeout,
432 peername => $rhost, 494 on_error => sub {
433 tls_ctx => $arg{tls_ctx}; 495 %state = ();
496 $cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
497 },
498 on_eof => sub {
499 %state = ();
500 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
501 },
502 ;
434 503
435 # limit the number of persistent connections 504 # limit the number of persistent connections
436 # keepalive not yet supported 505 # keepalive not yet supported
437 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 506# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
438 ++$KA_COUNT{$_[1]}; 507# ++$KA_COUNT{$_[1]};
439 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 508# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
440 --$KA_COUNT{$_[1]} 509# --$KA_COUNT{$_[1]}
441 }; 510# };
442 $hdr{connection} = "keep-alive"; 511# $hdr{connection} = "keep-alive";
443 } else { 512# } else {
444 delete $hdr{connection}; 513 delete $hdr{connection};
445 } 514# }
446 515
447 # (re-)configure handle
448 $state{handle}->on_error (sub {
449 %state = ();
450 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
451 });
452 $state{handle}->on_eof (sub {
453 %state = ();
454 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
455 });
456
457 $state{handle}->starttls ("connect") if $rscheme eq "https"; 516 $state{handle}->starttls ("connect") if $rscheme eq "https";
458 517
459 # handle actual, non-tunneled, request 518 # handle actual, non-tunneled, request
460 my $handle_actual_request = sub { 519 my $handle_actual_request = sub {
461 $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};
462 521
463 # send request 522 # send request
464 $state{handle}->push_write ( 523 $state{handle}->push_write (
465 "$method $rpath HTTP/1.0\015\012" 524 "$method $rpath HTTP/1.0\015\012"
466 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) 525 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
467 . "\015\012" 526 . "\015\012"
468 . (delete $arg{body}) 527 . (delete $arg{body})
469 );
470
471 %hdr = (); # reduce memory usage, save a kitten
472
473 # status line
474 $state{handle}->push_read (line => $qr_nl, sub {
475 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
476 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
477
478 my %hdr = ( # response headers
479 HTTPVersion => ",$1",
480 Status => ",$2",
481 Reason => ",$3",
482 URL => ",$url"
483 ); 528 );
484 529
485 # 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
486 $state{handle}->unshift_read (line => $qr_nlnl, sub { 536 $state{handle}->push_read (line => $qr_nlnl, sub {
487 for ("$_[1]\012") { 537 for ("$_[1]") {
488 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 ;
489 548
490 # things seen, not parsed: 549 # things seen, not parsed:
491 # p3pP="NON CUR OTPi OUR NOR UNI" 550 # p3pP="NON CUR OTPi OUR NOR UNI"
492 551
493 $hdr{lc $1} .= ",$2" 552 $hdr{lc $1} .= ",$2"
494 while /\G 553 while /\G
495 ([^:\000-\037]+): 554 ([^:\000-\037]*):
496 [\011\040]* 555 [\011\040]*
497 ((?: [^\012]+ | \012[\011\040] )*) 556 ((?: [^\012]+ | \012[\011\040] )*)
498 \012 557 \012
499 /gxc; 558 /gxc;
500 559
501 /\G$/ 560 /\G$/
502 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 }));
503 } 562 }
504 563
564 # remove the "," prefix we added to all headers above
505 substr $_, 0, 1, "" 565 substr $_, 0, 1, ""
506 for values %hdr; 566 for values %hdr;
567
568 # patch in all pseudo headers
569 %hdr = (%hdr, @pseudo);
507 570
508 # redirect handling 571 # redirect handling
509 # microsoft and other shitheads don't give a shit for following standards, 572 # microsoft and other shitheads don't give a shit for following standards,
510 # try to support some common forms of broken Location headers. 573 # try to support some common forms of broken Location headers.
511 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 574 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
… …
522 } 585 }
523 586
524 my $redirect; 587 my $redirect;
525 588
526 if ($recurse) { 589 if ($recurse) {
527 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 590 my $status = $hdr{Status};
528 # apparently, mozilla et al. just change POST to GET here 591
529 # more research is needed before we do the same 592 # industry standard is to redirect POST as GET for
530 $redirect = 1; 593 # 301, 302 and 303, in contrast to http/1.0 and 1.1.
531 } elsif ($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) {
532 # even http/1.1 is unclear on how to mutate the method 598 # HTTP/1.1 is unclear on how to mutate the method
533 $method = "GET" unless $method eq "HEAD"; 599 $method = "GET" unless $method eq "HEAD";
534 $redirect = 1; 600 $redirect = 1;
535 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 601 } elsif ($status == 307) {
536 $redirect = 1; 602 $redirect = 1;
537 } 603 }
538 } 604 }
539 605
540 my $finish = sub { 606 my $finish = sub {
… …
589 655
590 redo if /\G\s*,/gc; 656 redo if /\G\s*,/gc;
591 } 657 }
592 } 658 }
593 659
594 if ($redirect) { 660 if ($redirect && exists $hdr{location}) {
595 # we ignore any errors, as it is very common to receive 661 # we ignore any errors, as it is very common to receive
596 # Content-Length != 0 but no actual body 662 # Content-Length != 0 but no actual body
597 # we also access %hdr, as $_[1] might be an erro 663 # we also access %hdr, as $_[1] might be an erro
598 http_request ($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);
599 } else { 670 } else {
600 $cb->($_[0], $_[1]); 671 $cb->($_[0], $_[1]);
601 } 672 }
602 }; 673 };
603 674
604 my $len = $hdr{"content-length"}; 675 my $len = $hdr{"content-length"};
605 676
606 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { 677 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
607 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url }); 678 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
608 } elsif ( 679 } elsif (
609 $hdr{Status} =~ /^(?:1..|[23]04)$/ 680 $hdr{Status} =~ /^(?:1..|[23]04)$/
610 or $method eq "HEAD" 681 or $method eq "HEAD"
611 or (defined $len && !$len) 682 or (defined $len && !$len)
612 ) { 683 ) {
… …
615 } else { 686 } else {
616 # body handling, four different code paths 687 # body handling, four different code paths
617 # for want_body_handle, on_body (2x), normal (2x) 688 # for want_body_handle, on_body (2x), normal (2x)
618 # 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)
619 if (!$redirect && $arg{want_body_handle}) { 690 if (!$redirect && $arg{want_body_handle}) {
620 $_[0]->on_eof (undef); 691 $_[0]->on_eof (undef);
621 $_[0]->on_error (undef); 692 $_[0]->on_error (undef);
622 $_[0]->on_read (undef); 693 $_[0]->on_read (undef);
623 694
624 $finish->(delete $state{handle}, \%hdr); 695 $finish->(delete $state{handle}, \%hdr);
625 696
626 } elsif ($arg{on_body}) { 697 } elsif ($arg{on_body}) {
627 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 698 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
628 if ($len) { 699 if ($len) {
629 $_[0]->on_eof (undef); 700 $_[0]->on_eof (undef);
630 $_[0]->on_read (sub { 701 $_[0]->on_read (sub {
631 $len -= length $_[0]{rbuf}; 702 $len -= length $_[0]{rbuf};
632 703
633 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 704 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
634 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 });
635 706
636 $len > 0 707 $len > 0
637 or $finish->("", \%hdr); 708 or $finish->("", \%hdr);
638 }); 709 });
639 } else { 710 } else {
640 $_[0]->on_eof (sub { 711 $_[0]->on_eof (sub {
641 $finish->("", \%hdr); 712 $finish->("", \%hdr);
642 }); 713 });
643 $_[0]->on_read (sub { 714 $_[0]->on_read (sub {
644 $arg{on_body}(delete $_[0]{rbuf}, \%hdr) 715 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
645 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 });
646 }); 717 });
647 } 718 }
648 } else { 719 } else {
649 $_[0]->on_eof (undef); 720 $_[0]->on_eof (undef);
650 721
651 if ($len) { 722 if ($len) {
652 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); 723 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
653 $_[0]->on_read (sub { 724 $_[0]->on_read (sub {
654 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr) 725 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
655 if $len <= length $_[0]{rbuf}; 726 if $len <= length $_[0]{rbuf};
656 }); 727 });
657 } else { 728 } else {
658 $_[0]->on_error (sub { 729 $_[0]->on_error (sub {
659 $! == Errno::EPIPE 730 ($! == Errno::EPIPE || !$!)
660 ? $finish->(delete $_[0]{rbuf}, \%hdr) 731 ? $finish->(delete $_[0]{rbuf}, \%hdr)
661 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 732 : $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
662 }); 733 });
663 $_[0]->on_read (sub { }); 734 $_[0]->on_read (sub { });
664 } 735 }
665 } 736 }
666 } 737 }
667 }); 738 });
668 }); 739 };
669 };
670 740
671 # now handle proxy-CONNECT method 741 # now handle proxy-CONNECT method
672 if ($proxy && $uscheme eq "https") { 742 if ($proxy && $uscheme eq "https") {
673 # oh dear, we have to wrap it into a connect request 743 # oh dear, we have to wrap it into a connect request
674 744
675 # maybe re-use $uauthority with patched port? 745 # maybe re-use $uauthority with patched port?
676 $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");
677 $state{handle}->push_read (line => $qr_nlnl, sub { 747 $state{handle}->push_read (line => $qr_nlnl, sub {
678 $_[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
679 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 }));
680 750
681 if ($2 == 200) { 751 if ($2 == 200) {
682 $rpath = $upath; 752 $rpath = $upath;
683 &$handle_actual_request; 753 &$handle_actual_request;
684 } else { 754 } else {
685 %state = (); 755 %state = ();
686 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 756 $cb->(undef, { Status => $2, Reason => $3, @pseudo });
757 }
687 } 758 });
688 });
689 } else { 759 } else {
690 &$handle_actual_request; 760 &$handle_actual_request;
761 }
762
691 } 763 },
692 764 $arg{on_prepare} || sub { $timeout }
693 }, sub {
694 $timeout
695 }; 765 );
696 }; 766 };
697 767
698 defined wantarray && AnyEvent::Util::guard { %state = () } 768 defined wantarray && AnyEvent::Util::guard { %state = () }
699} 769}
700 770
… …
714 &http_request 784 &http_request
715} 785}
716 786
717=back 787=back
718 788
789=head2 DNS CACHING
790
791AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
792the actual connection, which in turn uses AnyEvent::DNS to resolve
793hostnames. The latter is a simple stub resolver and does no caching
794on its own. If you want DNS caching, you currently have to provide
795your own default resolver (by storing a suitable resolver object in
796C<$AnyEvent::DNS::RESOLVER>).
797
719=head2 GLOBAL FUNCTIONS AND VARIABLES 798=head2 GLOBAL FUNCTIONS AND VARIABLES
720 799
721=over 4 800=over 4
722 801
723=item AnyEvent::HTTP::set_proxy "proxy-url" 802=item AnyEvent::HTTP::set_proxy "proxy-url"
724 803
725Sets 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
726string 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>.
727 809
728=item $AnyEvent::HTTP::MAX_RECURSE 810=item $AnyEvent::HTTP::MAX_RECURSE
729 811
730The default value for the C<recurse> request parameter (default: C<10>). 812The default value for the C<recurse> request parameter (default: C<10>).
731 813
732=item $AnyEvent::HTTP::USERAGENT 814=item $AnyEvent::HTTP::USERAGENT
733 815
734The default value for the C<User-Agent> header (the default is 816The default value for the C<User-Agent> header (the default is
735C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 817C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
736 818
737=item $AnyEvent::HTTP::MAX_PERSISTENT 819=item $AnyEvent::HTTP::MAX_PER_HOST
738 820
739The maximum number of persistent connections to keep open (default: 8). 821The maximum number of concurrent connections to the same host (identified
822by the hostname). If the limit is exceeded, then the additional requests
823are queued until previous connections are closed.
740 824
741Not implemented currently. 825The default value for this is C<4>, and it is highly advisable to not
742 826increase it.
743=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
744
745The maximum time to cache a persistent connection, in seconds (default: 2).
746
747Not implemented currently.
748 827
749=item $AnyEvent::HTTP::ACTIVE 828=item $AnyEvent::HTTP::ACTIVE
750 829
751The number of active connections. This is not the number of currently 830The number of active connections. This is not the number of currently
752running requests, but the number of currently open and non-idle TCP 831running requests, but the number of currently open and non-idle TCP
… …
755=back 834=back
756 835
757=cut 836=cut
758 837
759sub set_proxy($) { 838sub set_proxy($) {
839 if (length $_[0]) {
760 $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 }
761} 846}
762 847
763# initialise proxy from environment 848# initialise proxy from environment
849eval {
764set_proxy $ENV{http_proxy}; 850 set_proxy $ENV{http_proxy};
851};
765 852
766=head1 SEE ALSO 853=head1 SEE ALSO
767 854
768L<AnyEvent>. 855L<AnyEvent>.
769 856

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