ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/AnyEvent-HTTP/HTTP.pm
(Generate patch)

Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.43 by root, Mon Jul 6 03:03:12 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 $MAX_RECURSE = 10;
… …
99The callback will be called with the response body data as first argument 99The callback will be called with the response body data as first argument
100(or C<undef> if an error occured), and a hash-ref with response headers as 100(or C<undef> if an error occured), and a hash-ref with response headers as
101second argument. 101second argument.
102 102
103All the headers in that hash are lowercased. In addition to the response 103All the headers in that hash are lowercased. In addition to the response
104headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason> 104headers, the "pseudo-headers" (uppercase to avoid clashing with possible
105response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the
105contain the three parts of the HTTP Status-Line of the same name. The 106three parts of the HTTP Status-Line of the same name.
107
106pseudo-header C<URL> contains the original URL (which can differ from the 108The pseudo-header C<URL> contains the actual URL (which can differ from
107requested URL when following redirects). 109the requested URL when following redirects - for example, you might get
110an error that your URL scheme is not supported even though your URL is a
111valid http URL because it redirected to an ftp URL, in which case you can
112look at the URL pseudo header).
113
114The pseudo-header C<Redirect> only exists when the request was a result
115of an internal redirect. In that case it is an array reference with
116the C<($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($$@) { 348sub http_request($$@) {
… …
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
360 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"; 392 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"
393 unless exists $hdr{host};
361 394
362 $uhost =~ s/^\[(.*)\]$/$1/; 395 $uhost =~ s/^\[(.*)\]$/$1/;
363 $upath .= "?$query" if length $query; 396 $upath .= $query if length $query;
364 397
365 $upath =~ s%^/?%/%; 398 $upath =~ s%^/?%/%;
366 399
367 # cookie processing 400 # cookie processing
368 if (my $jar = $arg{cookie_jar}) { 401 if (my $jar = $arg{cookie_jar}) {
… …
398 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path 431 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
399 432
400 if ($proxy) { 433 if ($proxy) {
401 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); 434 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
402 435
436 $rscheme = "http" unless defined $rscheme;
437
403 # don't support https requests over https-proxy transport, 438 # don't support https requests over https-proxy transport,
404 # 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.
405 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; 440 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
406 } else { 441 } else {
407 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); 442 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
408 } 443 }
409 444
410 $hdr{"user-agent"} ||= $USERAGENT; 445 # leave out fragment and query string, just a heuristic
411 $hdr{referer} ||= "$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"};
412 448
413 $hdr{"content-length"} = length $arg{body}; 449 $hdr{"content-length"} = length $arg{body}
450 if length $arg{body} || $method ne "GET";
414 451
415 my %state = (connect_guard => 1); 452 my %state = (connect_guard => 1);
416 453
417 _get_slot $uhost, sub { 454 _get_slot $uhost, sub {
418 $state{slot_guard} = shift; 455 $state{slot_guard} = shift;
419 456
420 return unless $state{connect_guard}; 457 return unless $state{connect_guard};
421 458
422 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 459 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
423 $state{fh} = shift 460 $state{fh} = shift
461 or do {
462 my $err = "$!";
463 %state = ();
424 or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url })); 464 return $cb->(undef, { Status => 599, Reason => $err, @pseudo });
465 };
466
425 pop; # free memory, save a tree 467 pop; # free memory, save a tree
426 468
427 return unless delete $state{connect_guard}; 469 return unless delete $state{connect_guard};
428 470
429 # get handle 471 # get handle
430 $state{handle} = new AnyEvent::Handle 472 $state{handle} = new AnyEvent::Handle
431 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
432 timeout => $timeout, 477 timeout => $timeout,
433 peername => $rhost, 478 on_error => sub {
434 tls_ctx => $arg{tls_ctx}; 479 %state = ();
480 $cb->(undef, { Status => 599, Reason => $_[2], @pseudo });
481 },
482 on_eof => sub {
483 %state = ();
484 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo });
485 },
486 ;
435 487
436 # limit the number of persistent connections 488 # limit the number of persistent connections
437 # keepalive not yet supported 489 # keepalive not yet supported
438 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 490# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
439 ++$KA_COUNT{$_[1]}; 491# ++$KA_COUNT{$_[1]};
440 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { 492# $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
441 --$KA_COUNT{$_[1]} 493# --$KA_COUNT{$_[1]}
442 }; 494# };
443 $hdr{connection} = "keep-alive"; 495# $hdr{connection} = "keep-alive";
444 } else { 496# } else {
445 delete $hdr{connection}; 497 delete $hdr{connection};
446 } 498# }
447
448 # (re-)configure handle
449 $state{handle}->on_error (sub {
450 %state = ();
451 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
452 });
453 $state{handle}->on_eof (sub {
454 %state = ();
455 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
456 });
457 499
458 $state{handle}->starttls ("connect") if $rscheme eq "https"; 500 $state{handle}->starttls ("connect") if $rscheme eq "https";
459 501
460 # handle actual, non-tunneled, request 502 # handle actual, non-tunneled, request
461 my $handle_actual_request = sub { 503 my $handle_actual_request = sub {
462 $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};
463 505
464 # send request 506 # send request
465 $state{handle}->push_write ( 507 $state{handle}->push_write (
466 "$method $rpath HTTP/1.0\015\012" 508 "$method $rpath HTTP/1.0\015\012"
467 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) 509 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
468 . "\015\012" 510 . "\015\012"
469 . (delete $arg{body}) 511 . (delete $arg{body})
470 ); 512 );
471 513
514 # return if error occured during push_write()
515 return unless %state;
516
472 %hdr = (); # reduce memory usage, save a kitten 517 %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use
473 518
474 # status line 519 # status line and headers
475 $state{handle}->push_read (line => $qr_nl, sub { 520 $state{handle}->push_read (line => $qr_nlnl, sub {
476 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
477 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
478
479 my %hdr = ( # response headers
480 HTTPVersion => ",$1",
481 Status => ",$2",
482 Reason => ",$3",
483 URL => ",$url"
484 );
485
486 # headers, could be optimized a bit
487 $state{handle}->unshift_read (line => $qr_nlnl, sub {
488 for ("$_[1]\012") { 521 for ("$_[1]") {
489 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.
490 523
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
491 # things seen, not parsed: 533 # things seen, not parsed:
492 # p3pP="NON CUR OTPi OUR NOR UNI" 534 # p3pP="NON CUR OTPi OUR NOR UNI"
493 535
494 $hdr{lc $1} .= ",$2" 536 $hdr{lc $1} .= ",$2"
495 while /\G 537 while /\G
496 ([^:\000-\037]*): 538 ([^:\000-\037]*):
497 [\011\040]* 539 [\011\040]*
498 ((?: [^\012]+ | \012[\011\040] )*) 540 ((?: [^\012]+ | \012[\011\040] )*)
499 \012 541 \012
500 /gxc; 542 /gxc;
501 543
502 /\G$/ 544 /\G$/
503 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 $url =~ s/\/[^\/]*$//;
504 } 566 }
505 567
506 substr $_, 0, 1, ""
507 for values %hdr;
508
509 # redirect handling
510 # microsoft and other shitheads don't give a shit for following standards,
511 # try to support some common forms of broken Location headers.
512 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
513 $hdr{location} =~ s/^\.\/+//;
514
515 my $url = "$rscheme://$uhost:$uport";
516
517 unless ($hdr{location} =~ s/^\///) {
518 $url .= $upath;
519 $url =~ s/\/[^\/]*$//;
520 }
521
522 $hdr{location} = "$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;
523 } 587 }
588 }
524 589
525 my $redirect; 590 my $finish = sub {
591 $state{handle}->destroy if $state{handle};
592 %state = ();
526 593
594 # set-cookie processing
527 if ($recurse) { 595 if ($arg{cookie_jar}) {
528 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { 596 for ($_[1]{"set-cookie"}) {
529 # apparently, mozilla et al. just change POST to GET here 597 # parse NAME=VALUE
530 # more research is needed before we do the same 598 my @kv;
599
600 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
531 $redirect = 1; 601 my $name = $1;
532 } elsif ($hdr{Status} == 303) { 602 my $value = $3;
533 # even http/1.1 is unclear on how to mutate the method 603
534 $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
535 $redirect = 1; 636 # store it
536 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { 637 $arg{cookie_jar}{version} = 1;
537 $redirect = 1; 638 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
639
640 redo if /\G\s*,/gc;
538 } 641 }
539 } 642 }
540 643
541 my $finish = sub { 644 if ($redirect && exists $hdr{location}) {
542 $state{handle}->destroy if $state{handle}; 645 # we ignore any errors, as it is very common to receive
543 %state = (); 646 # Content-Length != 0 but no actual body
544 647 # we also access %hdr, as $_[1] might be an erro
545 # set-cookie processing 648 http_request (
546 if ($arg{cookie_jar}) { 649 $method => $hdr{location},
547 for ($_[1]{"set-cookie"}) {
548 # parse NAME=VALUE
549 my @kv;
550
551 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
552 my $name = $1;
553 my $value = $3;
554
555 unless ($value) {
556 $value = $2;
557 $value =~ s/\\(.)/$1/gs;
558 } 650 %arg,
651 recurse => $recurse - 1,
652 Redirect => \@_,
653 $cb);
654 } else {
655 $cb->($_[0], $_[1]);
656 }
657 };
559 658
560 push @kv, $name => $value; 659 my $len = $hdr{"content-length"};
561 660
562 last unless /\G\s*;/gc; 661 if (!$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
563 } 691 $len > 0
564 692 or $finish->("", \%hdr);
565 last unless @kv;
566
567 my $name = shift @kv;
568 my %kv = (value => shift @kv, @kv);
569
570 my $cdom;
571 my $cpath = (delete $kv{path}) || "/";
572
573 if (exists $kv{domain}) {
574 $cdom = delete $kv{domain};
575
576 $cdom =~ s/^\.?/./; # make sure it starts with a "."
577
578 next if $cdom =~ /\.$/;
579
580 # this is not rfc-like and not netscape-like. go figure.
581 my $ndots = $cdom =~ y/.//;
582 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
583 } else {
584 $cdom = $uhost;
585 }
586
587 # store it
588 $arg{cookie_jar}{version} = 1;
589 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
590
591 redo if /\G\s*,/gc;
592 } 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 });
593 } 702 }
703 } else {
704 $_[0]->on_eof (undef);
594 705
595 if ($redirect) { 706 if ($len) {
596 # we ignore any errors, as it is very common to receive 707 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) });
597 # Content-Length != 0 but no actual body 708 $_[0]->on_read (sub {
598 # we also access %hdr, as $_[1] might be an erro 709 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
599 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); 710 if $len <= length $_[0]{rbuf};
711 });
600 } else { 712 } else {
601 $cb->($_[0], $_[1]);
602 }
603 };
604
605 my $len = $hdr{"content-length"};
606
607 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
608 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
609 } elsif (
610 $hdr{Status} =~ /^(?:1..|[23]04)$/
611 or $method eq "HEAD"
612 or (defined $len && !$len)
613 ) {
614 # no body
615 $finish->("", \%hdr);
616 } else {
617 # body handling, four different code paths
618 # for want_body_handle, on_body (2x), normal (2x)
619 # we might read too much here, but it does not matter yet (no pers. connections)
620 if (!$redirect && $arg{want_body_handle}) {
621 $_[0]->on_eof (undef);
622 $_[0]->on_error (undef);
623 $_[0]->on_read (undef);
624
625 $finish->(delete $state{handle}, \%hdr);
626
627 } elsif ($arg{on_body}) {
628 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
629 if ($len) {
630 $_[0]->on_eof (undef);
631 $_[0]->on_read (sub {
632 $len -= length $_[0]{rbuf};
633
634 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
635 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
636
637 $len > 0
638 or $finish->("", \%hdr);
639 });
640 } else {
641 $_[0]->on_eof (sub {
642 $finish->("", \%hdr);
643 });
644 $_[0]->on_read (sub {
645 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
646 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
647 });
648 }
649 } else {
650 $_[0]->on_eof (undef);
651
652 if ($len) {
653 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
654 $_[0]->on_read (sub {
655 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
656 if $len <= length $_[0]{rbuf};
657 });
658 } else {
659 $_[0]->on_error (sub { 713 $_[0]->on_error (sub {
660 $! == Errno::EPIPE || !$! 714 ($! == Errno::EPIPE || !$!)
661 ? $finish->(delete $_[0]{rbuf}, \%hdr) 715 ? $finish->(delete $_[0]{rbuf}, \%hdr)
662 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); 716 : $finish->(undef, { Status => 599, Reason => $_[2], @pseudo });
663 }); 717 });
664 $_[0]->on_read (sub { }); 718 $_[0]->on_read (sub { });
665 }
666 } 719 }
667 } 720 }
668 }); 721 }
669 }); 722 });
670 }; 723 };
671 724
672 # now handle proxy-CONNECT method 725 # now handle proxy-CONNECT method
673 if ($proxy && $uscheme eq "https") { 726 if ($proxy && $uscheme eq "https") {
… …
675 728
676 # maybe re-use $uauthority with patched port? 729 # maybe re-use $uauthority with patched port?
677 $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");
678 $state{handle}->push_read (line => $qr_nlnl, sub { 731 $state{handle}->push_read (line => $qr_nlnl, sub {
679 $_[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
680 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 }));
681 734
682 if ($2 == 200) { 735 if ($2 == 200) {
683 $rpath = $upath; 736 $rpath = $upath;
684 &$handle_actual_request; 737 &$handle_actual_request;
685 } else { 738 } else {
686 %state = (); 739 %state = ();
687 $cb->(undef, { Status => $2, Reason => $3, URL => $url }); 740 $cb->(undef, { Status => $2, Reason => $3, @pseudo });
688 } 741 }
689 }); 742 });
690 } else { 743 } else {
691 &$handle_actual_request; 744 &$handle_actual_request;
692 } 745 }
693 746
694 }, sub { 747 }, $arg{on_prepare} || sub { $timeout };
695 $timeout
696 };
697 }; 748 };
698 749
699 defined wantarray && AnyEvent::Util::guard { %state = () } 750 defined wantarray && AnyEvent::Util::guard { %state = () }
700} 751}
701 752
… …
715 &http_request 766 &http_request
716} 767}
717 768
718=back 769=back
719 770
771=head2 DNS CACHING
772
773AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for
774the actual connection, which in turn uses AnyEvent::DNS to resolve
775hostnames. The latter is a simple stub resolver and does no caching
776on its own. If you want DNS caching, you currently have to provide
777your own default resolver (by storing a suitable resolver object in
778C<$AnyEvent::DNS::RESOLVER>).
779
720=head2 GLOBAL FUNCTIONS AND VARIABLES 780=head2 GLOBAL FUNCTIONS AND VARIABLES
721 781
722=over 4 782=over 4
723 783
724=item AnyEvent::HTTP::set_proxy "proxy-url" 784=item AnyEvent::HTTP::set_proxy "proxy-url"
725 785
726Sets 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
727string 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>.
728 791
729=item $AnyEvent::HTTP::MAX_RECURSE 792=item $AnyEvent::HTTP::MAX_RECURSE
730 793
731The default value for the C<recurse> request parameter (default: C<10>). 794The default value for the C<recurse> request parameter (default: C<10>).
732 795
… …
735The default value for the C<User-Agent> header (the default is 798The default value for the C<User-Agent> header (the default is
736C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 799C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
737 800
738=item $AnyEvent::HTTP::MAX_PER_HOST 801=item $AnyEvent::HTTP::MAX_PER_HOST
739 802
740The maximum number of concurrent conenctions to the same host (identified 803The maximum number of concurrent connections to the same host (identified
741by the hostname). If the limit is exceeded, then the additional requests 804by the hostname). If the limit is exceeded, then the additional requests
742are queued until previous connections are closed. 805are queued until previous connections are closed.
743 806
744The default value for this is C<4>, and it is highly advisable to not 807The default value for this is C<4>, and it is highly advisable to not
745increase it. 808increase it.
… …
753=back 816=back
754 817
755=cut 818=cut
756 819
757sub set_proxy($) { 820sub set_proxy($) {
821 if (length $_[0]) {
758 $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 }
759} 828}
760 829
761# initialise proxy from environment 830# initialise proxy from environment
831eval {
762set_proxy $ENV{http_proxy}; 832 set_proxy $ENV{http_proxy};
833};
763 834
764=head1 SEE ALSO 835=head1 SEE ALSO
765 836
766L<AnyEvent>. 837L<AnyEvent>.
767 838

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines