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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 1.57 by root, Mon Sep 6 06:31:32 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 (); 48use AnyEvent::Socket ();
49use AnyEvent::Handle (); 49use AnyEvent::Handle ();
50 50
51use base Exporter::; 51use base Exporter::;
52 52
53our $VERSION = '1.12'; 53our $VERSION = '1.46';
54 54
55our @EXPORT = qw(http_get http_post http_head http_request); 55our @EXPORT = qw(http_get http_post http_head http_request);
56 56
57our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; 57our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
58our $MAX_RECURSE = 10; 58our $MAX_RECURSE = 10;
59our $MAX_PERSISTENT = 8; 59our $MAX_PERSISTENT = 8;
60our $PERSISTENT_TIMEOUT = 2; 60our $PERSISTENT_TIMEOUT = 2;
61our $TIMEOUT = 300; 61our $TIMEOUT = 300;
62 62
63# changing these is evil 63# changing these is evil
64our $MAX_PERSISTENT_PER_HOST = 2; 64our $MAX_PERSISTENT_PER_HOST = 0;
65our $MAX_PER_HOST = 4; 65our $MAX_PER_HOST = 4;
66 66
67our $PROXY; 67our $PROXY;
68our $ACTIVE = 0; 68our $ACTIVE = 0;
69 69
… …
99The callback will be called with the response body data as first argument 99The callback will be called with the response body data as first argument
100(or C<undef> if an error occured), and a hash-ref with response headers as 100(or C<undef> if an error occured), and a hash-ref with response headers as
101second argument. 101second argument.
102 102
103All the headers in that hash are lowercased. In addition to the response 103All the headers in that hash are lowercased. In addition to the response
104headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason> 104headers, the "pseudo-headers" (uppercase to avoid clashing with possible
105response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
105contain the three parts of the HTTP Status-Line of the same name. The 106three parts of the HTTP Status-Line of the same name.
107
106pseudo-header C<URL> contains the original URL (which can differ from the 108The pseudo-header C<URL> contains the actual URL (which can differ from
107requested URL when following redirects). 109the requested URL when following redirects - for example, you might get
110an error that your URL scheme is not supported even though your URL is a
111valid http URL because it redirected to an ftp URL, in which case you can
112look at the URL pseudo header).
113
114The pseudo-header C<Redirect> only exists when the request was a result
115of an internal redirect. In that case it is an array reference with
116the C<($data, $headers)> from the redirect response. Note that this
117response could in turn be the result of a redirect itself, and C<<
118$headers->{Redirect}[1]{Redirect} >> will then contain the original
119response, and so on.
108 120
109If the server sends a header multiple times, then their contents will be 121If the server sends a header multiple times, then their contents will be
110joined together with a comma (C<,>), as per the HTTP spec. 122joined together with a comma (C<,>), as per the HTTP spec.
111 123
112If an internal error occurs, such as not being able to resolve a hostname, 124If an internal error occurs, such as not being able to resolve a hostname,
… …
138 150
139=item headers => hashref 151=item headers => hashref
140 152
141The request headers to use. Currently, C<http_request> may provide its 153The request headers to use. Currently, C<http_request> may provide its
142own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers 154own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
143and will provide defaults for C<User-Agent:> and C<Referer:>. 155and will provide defaults for C<User-Agent:> and C<Referer:> (this can be
156suppressed by using C<undef> for these headers in which case they won't be
157sent at all).
144 158
145=item timeout => $seconds 159=item timeout => $seconds
146 160
147The time-out to use for various stages - each connect attempt will reset 161The time-out to use for various stages - each connect attempt will reset
148the timeout, as will read or write activity. Default timeout is 5 minutes. 162the timeout, as will read or write activity, i.e. this is not an overall
163timeout.
164
165Default timeout is 5 minutes.
149 166
150=item proxy => [$host, $port[, $scheme]] or undef 167=item proxy => [$host, $port[, $scheme]] or undef
151 168
152Use the given http proxy for all requests. If not specified, then the 169Use the given http proxy for all requests. If not specified, then the
153default proxy (as specified by C<$ENV{http_proxy}>) is used. 170default proxy (as specified by C<$ENV{http_proxy}>) is used.
154 171
155C<$scheme> must be either missing or C<http> for HTTP, or C<https> for 172C<$scheme> must be either missing, C<http> for HTTP or C<https> for
156HTTPS. 173HTTPS.
157 174
158=item body => $string 175=item body => $string
159 176
160The request body, usually empty. Will be-sent as-is (future versions of 177The request body, usually empty. Will be-sent as-is (future versions of
… …
186verification) TLS context. 203verification) TLS context.
187 204
188The default for this option is C<low>, which could be interpreted as "give 205The default for this option is C<low>, which could be interpreted as "give
189me the page, no matter what". 206me the page, no matter what".
190 207
208=item on_prepare => $callback->($fh)
209
210In rare cases you need to "tune" the socket before it is used to
211connect (for exmaple, to bind it on a given IP address). This parameter
212overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
213and behaves exactly the same way (e.g. it has to provide a
214timeout). See the description for the C<$prepare_cb> argument of
215C<AnyEvent::Socket::tcp_connect> for details.
216
191=item on_header => $callback->($headers) 217=item on_header => $callback->($headers)
192 218
193When specified, this callback will be called with the header hash as soon 219When specified, this callback will be called with the header hash as soon
194as headers have been successfully received from the remote server (not on 220as headers have been successfully received from the remote server (not on
195locally-generated errors). 221locally-generated errors).
… …
221This callback is useful when the data is too large to be held in memory 247This 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 248(so the callback writes it to a file) or when only some information should
223be extracted, or when the body should be processed incrementally. 249be extracted, or when the body should be processed incrementally.
224 250
225It is usually preferred over doing your own body handling via 251It is usually preferred over doing your own body handling via
226C<want_body_handle>. 252C<want_body_handle>, but in case of streaming APIs, where HTTP is
253only used to create a connection, C<want_body_handle> is the better
254alternative, as it allows you to install your own event handler, reducing
255resource usage.
227 256
228=item want_body_handle => $enable 257=item want_body_handle => $enable
229 258
230When enabled (default is disabled), the behaviour of AnyEvent::HTTP 259When enabled (default is disabled), the behaviour of AnyEvent::HTTP
231changes considerably: after parsing the headers, and instead of 260changes considerably: after parsing the headers, and instead of
… …
243This is useful with some push-type services, where, after the initial 272This is useful with some push-type services, where, after the initial
244headers, an interactive protocol is used (typical example would be the 273headers, an interactive protocol is used (typical example would be the
245push-style twitter API which starts a JSON/XML stream). 274push-style twitter API which starts a JSON/XML stream).
246 275
247If you think you need this, first have a look at C<on_body>, to see if 276If 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. 277that doesn't solve your problem in a better way.
249 278
250=back 279=back
251 280
252Example: make a simple HTTP GET request for http://www.nethype.de/ 281Example: make a simple HTTP GET request for http://www.nethype.de/
253 282
… …
309 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 338 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
310 339
311 _slot_schedule $_[0]; 340 _slot_schedule $_[0];
312} 341}
313 342
314our $qr_nl = qr<\015?\012>; 343our $qr_nlnl = qr{(?<![^\012])\015?\012};
315our $qr_nlnl = qr<\015?\012\015?\012>;
316 344
317our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; 345our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
318our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; 346our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
319 347
320sub http_request($$@) { 348sub http_request($$@) {
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332 while (my ($k, $v) = each %$hdr) { 360 while (my ($k, $v) = each %$hdr) {
333 $hdr{lc $k} = $v; 361 $hdr{lc $k} = $v;
334 } 362 }
335 } 363 }
336 364
365 # pseudo headers for all subsequent responses
366 my @pseudo = (URL => $url);
367 push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect};
368
337 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 369 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
338 370
339 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) 371 return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo })
340 if $recurse < 0; 372 if $recurse < 0;
341 373
342 my $proxy = $arg{proxy} || $PROXY; 374 my $proxy = $arg{proxy} || $PROXY;
343 my $timeout = $arg{timeout} || $TIMEOUT; 375 my $timeout = $arg{timeout} || $TIMEOUT;
344 376
345 my ($uscheme, $uauthority, $upath, $query, $fragment) = 377 my ($uscheme, $uauthority, $upath, $query, $fragment) =
346 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 378 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|;
347 379
348 $uscheme = lc $uscheme; 380 $uscheme = lc $uscheme;
349 381
350 my $uport = $uscheme eq "http" ? 80 382 my $uport = $uscheme eq "http" ? 80
351 : $uscheme eq "https" ? 443 383 : $uscheme eq "https" ? 443
352 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url }); 384 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", @pseudo });
353 385
354 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 386 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
355 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); 387 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo });
356 388
357 my $uhost = $1; 389 my $uhost = $1;
358 $uport = $2 if defined $2; 390 $uport = $2 if defined $2;
359 391
392 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
393 unless exists $hdr{host};
394
360 $uhost =~ s/^\[(.*)\]$/$1/; 395 $uhost =~ s/^\[(.*)\]$/$1/;
361 $upath .= "?$query" if length $query; 396 $upath .= $query if length $query;
362 397
363 $upath =~ s%^/?%/%; 398 $upath =~ s%^/?%/%;
364 399
365 # cookie processing 400 # cookie processing
366 if (my $jar = $arg{cookie_jar}) { 401 if (my $jar = $arg{cookie_jar}) {
… …
396 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path 431 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
397 432
398 if ($proxy) { 433 if ($proxy) {
399 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); 434 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
400 435
436 $rscheme = "http" unless defined $rscheme;
437
401 # don't support https requests over https-proxy transport, 438 # don't support https requests over https-proxy transport,
402 # can't be done with tls as spec'ed, unless you double-encrypt. 439 # can't be done with tls as spec'ed, unless you double-encrypt.
403 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; 440 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
404 } else { 441 } else {
405 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); 442 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
406 } 443 }
407 444
408 $hdr{"user-agent"} ||= $USERAGENT; 445 # leave out fragment and query string, just a heuristic
409 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic 446 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
447 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};
410 448
411 $hdr{host} = "$uhost:$uport";
412 $hdr{"content-length"} = length $arg{body}; 449 $hdr{"content-length"} = length $arg{body}
450 if length $arg{body} || $method ne "GET";
413 451
414 my %state = (connect_guard => 1); 452 my %state = (connect_guard => 1);
415 453
416 _get_slot $uhost, sub { 454 _get_slot $uhost, sub {
417 $state{slot_guard} = shift; 455 $state{slot_guard} = shift;
418 456
419 return unless $state{connect_guard}; 457 return unless $state{connect_guard};
420 458
421 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 459 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
422 $state{fh} = shift 460 $state{fh} = shift
461 or do {
462 my $err = "$!";
463 %state = ();
423 or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url })); 464 return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
465 };
466
424 pop; # free memory, save a tree 467 pop; # free memory, save a tree
425 468
426 return unless delete $state{connect_guard}; 469 return unless delete $state{connect_guard};
427 470
428 # get handle 471 # get handle
429 $state{handle} = new AnyEvent::Handle 472 $state{handle} = new AnyEvent::Handle
430 fh => $state{fh}, 473 fh => $state{fh},
474 peername => $rhost,
475 tls_ctx => $arg{tls_ctx},
476 # these need to be reconfigured on keepalive handles
431 timeout => $timeout, 477 timeout => $timeout,
432 peername => $rhost, 478 on_error => sub {
433 tls_ctx => $arg{tls_ctx}; 479 %state = ();
480 $cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
481 },
482 on_eof => sub {
483 %state = ();
484 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
485 },
486 ;
434 487
435 # limit the number of persistent connections 488 # limit the number of persistent connections
436 # keepalive not yet supported 489 # keepalive not yet supported
437 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 490# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
438 ++$KA_COUNT{$_[1]}; 491# ++$KA_COUNT{$_[1]};
439 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 492# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
440 --$KA_COUNT{$_[1]} 493# --$KA_COUNT{$_[1]}
441 }; 494# };
442 $hdr{connection} = "keep-alive"; 495# $hdr{connection} = "keep-alive";
443 } else { 496# } else {
444 delete $hdr{connection}; 497 delete $hdr{connection};
445 } 498# }
446
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 });
456 499
457 $state{handle}->starttls ("connect") if $rscheme eq "https"; 500 $state{handle}->starttls ("connect") if $rscheme eq "https";
458 501
459 # handle actual, non-tunneled, request 502 # handle actual, non-tunneled, request
460 my $handle_actual_request = sub { 503 my $handle_actual_request = sub {
461 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; 504 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
462 505
463 # send request 506 # send request
464 $state{handle}->push_write ( 507 $state{handle}->push_write (
465 "$method $rpath HTTP/1.0\015\012" 508 "$method $rpath HTTP/1.0\015\012"
466 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) 509 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
467 . "\015\012" 510 . "\015\012"
468 . (delete $arg{body}) 511 . (delete $arg{body})
469 ); 512 );
470 513
514 # return if error occured during push_write()
515 return unless %state;
516
471 %hdr = (); # reduce memory usage, save a kitten 517 %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
472 518
473 # status line 519 # status line and headers
474 $state{handle}->push_read (line => $qr_nl, sub { 520 $state{handle}->push_read (line => $qr_nlnl, 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 );
484
485 # headers, could be optimized a bit
486 $state{handle}->unshift_read (line => $qr_nlnl, sub {
487 for ("$_[1]\012") { 521 for ("$_[1]") {
488 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 522 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
489 523
524 /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc
525 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response", @pseudo }));
526
527 push @pseudo,
528 HTTPVersion => $1,
529 Status => $2,
530 Reason => $3,
531 ;
532
490 # things seen, not parsed: 533 # things seen, not parsed:
491 # p3pP="NON CUR OTPi OUR NOR UNI" 534 # p3pP="NON CUR OTPi OUR NOR UNI"
492 535
493 $hdr{lc $1} .= ",$2" 536 $hdr{lc $1} .= ",$2"
494 while /\G 537 while /\G
495 ([^:\000-\037]+): 538 ([^:\000-\037]*):
496 [\011\040]* 539 [\011\040]*
497 ((?: [^\012]+ | \012[\011\040] )*) 540 ((?: [^\012]+ | \012[\011\040] )*)
498 \012 541 \012
499 /gxc; 542 /gxc;
500 543
501 /\G$/ 544 /\G$/
502 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url })); 545 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", @pseudo }));
546 }
547
548 # remove the "," prefix we added to all headers above
549 substr $_, 0, 1, ""
550 for values %hdr;
551
552 # patch in all pseudo headers
553 %hdr = (%hdr, @pseudo);
554
555 # redirect handling
556 # microsoft and other shitheads don't give a shit for following standards,
557 # try to support some common forms of broken Location headers.
558 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
559 $hdr{location} =~ s/^\.\/+//;
560
561 my $url = "$rscheme://$uhost:$uport";
562
563 unless ($hdr{location} =~ s/^\///) {
564 $url .= $upath;
565 $url =~ s/\/[^\/]*$//;
503 } 566 }
504 567
505 substr $_, 0, 1, ""
506 for values %hdr;
507
508 # redirect handling
509 # microsoft and other shitheads don't give a shit for following standards,
510 # try to support some common forms of broken Location headers.
511 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
512 $hdr{location} =~ s/^\.\/+//;
513
514 my $url = "$rscheme://$uhost:$uport";
515
516 unless ($hdr{location} =~ s/^\///) {
517 $url .= $upath;
518 $url =~ s/\/[^\/]*$//;
519 }
520
521 $hdr{location} = "$url/$hdr{location}"; 568 $hdr{location} = "$url/$hdr{location}";
569 }
570
571 my $redirect;
572
573 if ($recurse) {
574 my $status = $hdr{Status};
575
576 # industry standard is to redirect POST as GET for
577 # 301, 302 and 303, in contrast to http/1.0 and 1.1.
578 # also, the UA should ask the user for 301 and 307 and POST,
579 # industry standard seems to be to simply follow.
580 # we go with the industry standard.
581 if ($status == 301 or $status == 302 or $status == 303) {
582 # HTTP/1.1 is unclear on how to mutate the method
583 $method = "GET" unless $method eq "HEAD";
584 $redirect = 1;
585 } elsif ($status == 307) {
586 $redirect = 1;
522 } 587 }
588 }
523 589
524 my $redirect; 590 my $finish = sub {
591 $state{handle}->destroy if $state{handle};
592 %state = ();
525 593
594 # set-cookie processing
526 if ($recurse) { 595 if ($arg{cookie_jar}) {
527 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 596 for ($_[1]{"set-cookie"}) {
528 # apparently, mozilla et al. just change POST to GET here 597 # parse NAME=VALUE
529 # more research is needed before we do the same 598 my @kv;
599
600 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
530 $redirect = 1; 601 my $name = $1;
531 } elsif ($hdr{Status} == 303) { 602 my $value = $3;
532 # even http/1.1 is unclear on how to mutate the method 603
533 $method = "GET" unless $method eq "HEAD"; 604 unless ($value) {
605 $value = $2;
606 $value =~ s/\\(.)/$1/gs;
607 }
608
609 push @kv, $name => $value;
610
611 last unless /\G\s*;/gc;
612 }
613
614 last unless @kv;
615
616 my $name = shift @kv;
617 my %kv = (value => shift @kv, @kv);
618
619 my $cdom;
620 my $cpath = (delete $kv{path}) || "/";
621
622 if (exists $kv{domain}) {
623 $cdom = delete $kv{domain};
624
625 $cdom =~ s/^\.?/./; # make sure it starts with a "."
626
627 next if $cdom =~ /\.$/;
628
629 # this is not rfc-like and not netscape-like. go figure.
630 my $ndots = $cdom =~ y/.//;
631 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
632 } else {
633 $cdom = $uhost;
634 }
635
534 $redirect = 1; 636 # store it
535 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 637 $arg{cookie_jar}{version} = 1;
536 $redirect = 1; 638 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
639
640 redo if /\G\s*,/gc;
537 } 641 }
538 } 642 }
539 643
540 my $finish = sub { 644 if ($redirect && exists $hdr{location}) {
541 $state{handle}->destroy if $state{handle}; 645 # we ignore any errors, as it is very common to receive
542 %state = (); 646 # Content-Length != 0 but no actual body
543 647 # we also access %hdr, as $_[1] might be an erro
544 # set-cookie processing 648 http_request (
545 if ($arg{cookie_jar}) { 649 $method => $hdr{location},
546 for ($_[1]{"set-cookie"}) {
547 # parse NAME=VALUE
548 my @kv;
549
550 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
551 my $name = $1;
552 my $value = $3;
553
554 unless ($value) {
555 $value = $2;
556 $value =~ s/\\(.)/$1/gs;
557 } 650 %arg,
651 recurse => $recurse - 1,
652 Redirect => \@_,
653 $cb);
654 } else {
655 $cb->($_[0], $_[1]);
656 }
657 };
558 658
559 push @kv, $name => $value; 659 my $len = $hdr{"content-length"};
560 660
561 last unless /\G\s*;/gc; 661 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
662 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo });
663 } elsif (
664 $hdr{Status} =~ /^(?:1..|[23]04)$/
665 or $method eq "HEAD"
666 or (defined $len && !$len)
667 ) {
668 # no body
669 $finish->("", \%hdr);
670 } else {
671 # body handling, four different code paths
672 # for want_body_handle, on_body (2x), normal (2x)
673 # we might read too much here, but it does not matter yet (no pers. connections)
674 if (!$redirect && $arg{want_body_handle}) {
675 $_[0]->on_eof (undef);
676 $_[0]->on_error (undef);
677 $_[0]->on_read (undef);
678
679 $finish->(delete $state{handle}, \%hdr);
680
681 } elsif ($arg{on_body}) {
682 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
683 if ($len) {
684 $_[0]->on_eof (undef);
685 $_[0]->on_read (sub {
686 $len -= length $_[0]{rbuf};
687
688 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
689 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
690
562 } 691 $len > 0
563 692 or $finish->("", \%hdr);
564 last unless @kv;
565
566 my $name = shift @kv;
567 my %kv = (value => shift @kv, @kv);
568
569 my $cdom;
570 my $cpath = (delete $kv{path}) || "/";
571
572 if (exists $kv{domain}) {
573 $cdom = delete $kv{domain};
574
575 $cdom =~ s/^\.?/./; # make sure it starts with a "."
576
577 next if $cdom =~ /\.$/;
578
579 # this is not rfc-like and not netscape-like. go figure.
580 my $ndots = $cdom =~ y/.//;
581 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
582 } else {
583 $cdom = $uhost;
584 }
585
586 # store it
587 $arg{cookie_jar}{version} = 1;
588 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
589
590 redo if /\G\s*,/gc;
591 } 693 });
694 } else {
695 $_[0]->on_eof (sub {
696 $finish->("", \%hdr);
697 });
698 $_[0]->on_read (sub {
699 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
700 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo });
701 });
592 } 702 }
703 } else {
704 $_[0]->on_eof (undef);
593 705
594 if ($redirect) { 706 if ($len) {
595 # we ignore any errors, as it is very common to receive 707 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
596 # Content-Length != 0 but no actual body 708 $_[0]->on_read (sub {
597 # we also access %hdr, as $_[1] might be an erro 709 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
598 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); 710 if $len <= length $_[0]{rbuf};
711 });
599 } else { 712 } else {
600 $cb->($_[0], $_[1]);
601 }
602 };
603
604 my $len = $hdr{"content-length"};
605
606 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
607 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
608 } elsif (
609 $hdr{Status} =~ /^(?:1..|[23]04)$/
610 or $method eq "HEAD"
611 or (defined $len && !$len)
612 ) {
613 # no body
614 $finish->("", \%hdr);
615 } else {
616 # body handling, four different code paths
617 # for want_body_handle, on_body (2x), normal (2x)
618 # we might read too much here, but it does not matter yet (no pers. connections)
619 if (!$redirect && $arg{want_body_handle}) {
620 $_[0]->on_eof (undef);
621 $_[0]->on_error (undef);
622 $_[0]->on_read (undef);
623
624 $finish->(delete $state{handle}, \%hdr);
625
626 } elsif ($arg{on_body}) {
627 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
628 if ($len) {
629 $_[0]->on_eof (undef);
630 $_[0]->on_read (sub {
631 $len -= length $_[0]{rbuf};
632
633 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
634 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
635
636 $len > 0
637 or $finish->("", \%hdr);
638 });
639 } else {
640 $_[0]->on_eof (sub {
641 $finish->("", \%hdr);
642 });
643 $_[0]->on_read (sub {
644 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
645 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
646 });
647 }
648 } else {
649 $_[0]->on_eof (undef);
650
651 if ($len) {
652 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
653 $_[0]->on_read (sub {
654 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
655 if $len <= length $_[0]{rbuf};
656 });
657 } else {
658 $_[0]->on_error (sub { 713 $_[0]->on_error (sub {
659 $! == Errno::EPIPE 714 ($! == Errno::EPIPE || !$!)
660 ? $finish->(delete $_[0]{rbuf}, \%hdr) 715 ? $finish->(delete $_[0]{rbuf}, \%hdr)
661 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 716 : $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
662 }); 717 });
663 $_[0]->on_read (sub { }); 718 $_[0]->on_read (sub { });
664 }
665 } 719 }
666 } 720 }
667 }); 721 }
668 }); 722 });
669 }; 723 };
670 724
671 # now handle proxy-CONNECT method 725 # now handle proxy-CONNECT method
672 if ($proxy && $uscheme eq "https") { 726 if ($proxy && $uscheme eq "https") {
… …
674 728
675 # maybe re-use $uauthority with patched port? 729 # 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"); 730 $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 { 731 $state{handle}->push_read (line => $qr_nlnl, sub {
678 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 732 $_[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 })); 733 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", @pseudo }));
680 734
681 if ($2 == 200) { 735 if ($2 == 200) {
682 $rpath = $upath; 736 $rpath = $upath;
683 &$handle_actual_request; 737 &$handle_actual_request;
684 } else { 738 } else {
685 %state = (); 739 %state = ();
686 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 740 $cb->(undef, { Status => $2, Reason => $3, @pseudo });
687 } 741 }
688 }); 742 });
689 } else { 743 } else {
690 &$handle_actual_request; 744 &$handle_actual_request;
691 } 745 }
692 746
693 }, sub { 747 }, $arg{on_prepare} || sub { $timeout };
694 $timeout
695 };
696 }; 748 };
697 749
698 defined wantarray && AnyEvent::Util::guard { %state = () } 750 defined wantarray && AnyEvent::Util::guard { %state = () }
699} 751}
700 752
… …
714 &http_request 766 &http_request
715} 767}
716 768
717=back 769=back
718 770
771=head2 DNS CACHING
772
773AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
774the actual connection, which in turn uses AnyEvent::DNS to resolve
775hostnames. The latter is a simple stub resolver and does no caching
776on its own. If you want DNS caching, you currently have to provide
777your own default resolver (by storing a suitable resolver object in
778C<$AnyEvent::DNS::RESOLVER>).
779
719=head2 GLOBAL FUNCTIONS AND VARIABLES 780=head2 GLOBAL FUNCTIONS AND VARIABLES
720 781
721=over 4 782=over 4
722 783
723=item AnyEvent::HTTP::set_proxy "proxy-url" 784=item AnyEvent::HTTP::set_proxy "proxy-url"
724 785
725Sets the default proxy server to use. The proxy-url must begin with a 786Sets the default proxy server to use. The proxy-url must begin with a
726string of the form C<http://host:port> (optionally C<https:...>). 787string of the form C<http://host:port> (optionally C<https:...>), croaks
788otherwise.
789
790To clear an already-set proxy, use C<undef>.
727 791
728=item $AnyEvent::HTTP::MAX_RECURSE 792=item $AnyEvent::HTTP::MAX_RECURSE
729 793
730The default value for the C<recurse> request parameter (default: C<10>). 794The default value for the C<recurse> request parameter (default: C<10>).
731 795
732=item $AnyEvent::HTTP::USERAGENT 796=item $AnyEvent::HTTP::USERAGENT
733 797
734The default value for the C<User-Agent> header (the default is 798The default value for the C<User-Agent> header (the default is
735C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 799C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
736 800
737=item $AnyEvent::HTTP::MAX_PERSISTENT 801=item $AnyEvent::HTTP::MAX_PER_HOST
738 802
739The maximum number of persistent connections to keep open (default: 8). 803The maximum number of concurrent connections to the same host (identified
804by the hostname). If the limit is exceeded, then the additional requests
805are queued until previous connections are closed.
740 806
741Not implemented currently. 807The default value for this is C<4>, and it is highly advisable to not
742 808increase it.
743=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
744
745The maximum time to cache a persistent connection, in seconds (default: 2).
746
747Not implemented currently.
748 809
749=item $AnyEvent::HTTP::ACTIVE 810=item $AnyEvent::HTTP::ACTIVE
750 811
751The number of active connections. This is not the number of currently 812The number of active connections. This is not the number of currently
752running requests, but the number of currently open and non-idle TCP 813running requests, but the number of currently open and non-idle TCP
… …
755=back 816=back
756 817
757=cut 818=cut
758 819
759sub set_proxy($) { 820sub set_proxy($) {
821 if (length $_[0]) {
760 $PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix; 822 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
823 or Carp::croak "$_[0]: invalid proxy URL";
824 $PROXY = [$2, $3 || 3128, $1]
825 } else {
826 undef $PROXY;
827 }
761} 828}
762 829
763# initialise proxy from environment 830# initialise proxy from environment
831eval {
764set_proxy $ENV{http_proxy}; 832 set_proxy $ENV{http_proxy};
833};
765 834
766=head1 SEE ALSO 835=head1 SEE ALSO
767 836
768L<AnyEvent>. 837L<AnyEvent>.
769 838

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