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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.35 by root, Thu Oct 30 03:47:01 2008 UTC vs.
Revision 1.51 by root, Fri Aug 14 15:21:33 2009 UTC

… …
39package AnyEvent::HTTP; 39package AnyEvent::HTTP;
40 40
41use strict; 41use strict;
42no warnings; 42no warnings;
43 43
44use Carp; 44use Errno ();
45 45
46use AnyEvent (); 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 = '1.1'; 53our $VERSION = '1.43';
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 $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$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
… …
94When called in void context, nothing is returned. In other contexts, 94When called in void context, nothing is returned. In other contexts,
95C<http_request> returns a "cancellation guard" - you have to keep the 95C<http_request> returns a "cancellation guard" - you have to keep the
96object at least alive until the callback get called. If the object gets 96object at least alive until the callback get called. If the object gets
97destroyed before the callbakc is called, the request will be cancelled. 97destroyed before the callbakc is called, the request will be cancelled.
98 98
99The callback will be called with the response data as first argument 99The callback will be called with the response body data as first argument
100(or C<undef> if it wasn't available due to errors), and a hash-ref with 100(or C<undef> if an error occured), and a hash-ref with response headers as
101response headers as second 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" C<HTTPVersion>, C<Status> and C<Reason>
105contain the three parts of the HTTP Status-Line of the same name. The 105contain the three parts of the HTTP Status-Line of the same name. The
106pseudo-header C<URL> contains the original URL (which can differ from the 106pseudo-header C<URL> contains the original URL (which can differ from the
… …
108 108
109If the server sends a header multiple times, then their contents will be 109If the server sends a header multiple times, then their contents will be
110joined together with a comma (C<,>), as per the HTTP spec. 110joined together with a comma (C<,>), as per the HTTP spec.
111 111
112If an internal error occurs, such as not being able to resolve a hostname, 112If an internal error occurs, such as not being able to resolve a hostname,
113then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> 113then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
114and the C<Reason> pseudo-header will contain an error message. 114(usually C<599>) and the C<Reason> pseudo-header will contain an error
115message.
115 116
116A typical callback might look like this: 117A typical callback might look like this:
117 118
118 sub { 119 sub {
119 my ($body, $hdr) = @_; 120 my ($body, $hdr) = @_;
… …
137 138
138=item headers => hashref 139=item headers => hashref
139 140
140The request headers to use. Currently, C<http_request> may provide its 141The request headers to use. Currently, C<http_request> may provide its
141own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers 142own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
142and will provide defaults for C<User-Agent:> and C<Referer:>. 143and will provide defaults for C<User-Agent:> and C<Referer:> (this can be
144suppressed by using C<undef> for these headers in which case they won't be
145sent at all).
143 146
144=item timeout => $seconds 147=item timeout => $seconds
145 148
146The time-out to use for various stages - each connect attempt will reset 149The time-out to use for various stages - each connect attempt will reset
147the timeout, as will read or write activity. Default timeout is 5 minutes. 150the timeout, as will read or write activity, i.e. this is not an overall
151timeout.
152
153Default timeout is 5 minutes.
148 154
149=item proxy => [$host, $port[, $scheme]] or undef 155=item proxy => [$host, $port[, $scheme]] or undef
150 156
151Use the given http proxy for all requests. If not specified, then the 157Use the given http proxy for all requests. If not specified, then the
152default proxy (as specified by C<$ENV{http_proxy}>) is used. 158default proxy (as specified by C<$ENV{http_proxy}>) is used.
153 159
154C<$scheme> must be either missing or C<http> for HTTP, or C<https> for 160C<$scheme> must be either missing, C<http> for HTTP or C<https> for
155HTTPS. 161HTTPS.
156 162
157=item body => $string 163=item body => $string
158 164
159The request body, usually empty. Will be-sent as-is (future versions of 165The request body, usually empty. Will be-sent as-is (future versions of
… …
165based on the original netscape specification. 171based on the original netscape specification.
166 172
167The C<$hash_ref> must be an (initially empty) hash reference which will 173The C<$hash_ref> must be an (initially empty) hash reference which will
168get updated automatically. It is possible to save the cookie_jar to 174get updated automatically. It is possible to save the cookie_jar to
169persistent storage with something like JSON or Storable, but this is not 175persistent storage with something like JSON or Storable, but this is not
170recommended, as expire times are currently being ignored. 176recommended, as expiry times are currently being ignored.
171 177
172Note that this cookie implementation is not of very high quality, nor 178Note that this cookie implementation is not of very high quality, nor
173meant to be complete. If you want complete cookie management you have to 179meant to be complete. If you want complete cookie management you have to
174do that on your own. C<cookie_jar> is meant as a quick fix to get some 180do that on your own. C<cookie_jar> is meant as a quick fix to get some
175cookie-using sites working. Cookies are a privacy disaster, do not use 181cookie-using sites working. Cookies are a privacy disaster, do not use
176them unless required to. 182them unless required to.
183
184=item tls_ctx => $scheme | $tls_ctx
185
186Specifies the AnyEvent::TLS context to be used for https connections. This
187parameter follows the same rules as the C<tls_ctx> parameter to
188L<AnyEvent::Handle>, but additionally, the two strings C<low> or
189C<high> can be specified, which give you a predefined low-security (no
190verification, highest compatibility) and high-security (CA and common-name
191verification) TLS context.
192
193The default for this option is C<low>, which could be interpreted as "give
194me the page, no matter what".
195
196=item on_prepare => $callback->($fh)
197
198In rare cases you need to "tune" the socket before it is used to
199connect (for exmaple, to bind it on a given IP address). This parameter
200overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect>
201and behaves exactly the same way (e.g. it has to provide a
202timeout). See the description for the C<$prepare_cb> argument of
203C<AnyEvent::Socket::tcp_connect> for details.
204
205=item on_header => $callback->($headers)
206
207When specified, this callback will be called with the header hash as soon
208as headers have been successfully received from the remote server (not on
209locally-generated errors).
210
211It has to return either true (in which case AnyEvent::HTTP will continue),
212or false, in which case AnyEvent::HTTP will cancel the download (and call
213the finish callback with an error code of C<598>).
214
215This callback is useful, among other things, to quickly reject unwanted
216content, which, if it is supposed to be rare, can be faster than first
217doing a C<HEAD> request.
218
219Example: cancel the request unless the content-type is "text/html".
220
221 on_header => sub {
222 $_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/
223 },
224
225=item on_body => $callback->($partial_body, $headers)
226
227When specified, all body data will be passed to this callback instead of
228to the completion callback. The completion callback will get the empty
229string instead of the body data.
230
231It has to return either true (in which case AnyEvent::HTTP will continue),
232or false, in which case AnyEvent::HTTP will cancel the download (and call
233the completion callback with an error code of C<598>).
234
235This callback is useful when the data is too large to be held in memory
236(so the callback writes it to a file) or when only some information should
237be extracted, or when the body should be processed incrementally.
238
239It is usually preferred over doing your own body handling via
240C<want_body_handle>, but in case of streaming APIs, where HTTP is
241only used to create a connection, C<want_body_handle> is the better
242alternative, as it allows you to install your own event handler, reducing
243resource usage.
244
245=item want_body_handle => $enable
246
247When enabled (default is disabled), the behaviour of AnyEvent::HTTP
248changes considerably: after parsing the headers, and instead of
249downloading the body (if any), the completion callback will be
250called. Instead of the C<$body> argument containing the body data, the
251callback will receive the L<AnyEvent::Handle> object associated with the
252connection. In error cases, C<undef> will be passed. When there is no body
253(e.g. status C<304>), the empty string will be passed.
254
255The handle object might or might not be in TLS mode, might be connected to
256a proxy, be a persistent connection etc., and configured in unspecified
257ways. The user is responsible for this handle (it will not be used by this
258module anymore).
259
260This is useful with some push-type services, where, after the initial
261headers, an interactive protocol is used (typical example would be the
262push-style twitter API which starts a JSON/XML stream).
263
264If you think you need this, first have a look at C<on_body>, to see if
265that doesn't solve your problem in a better way.
177 266
178=back 267=back
179 268
180Example: make a simple HTTP GET request for http://www.nethype.de/ 269Example: make a simple HTTP GET request for http://www.nethype.de/
181 270
… …
237 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 326 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
238 327
239 _slot_schedule $_[0]; 328 _slot_schedule $_[0];
240} 329}
241 330
242our $qr_nl = qr<\015?\012>; 331our $qr_nl = qr{\015?\012};
243our $qr_nlnl = qr<\015?\012\015?\012>; 332our $qr_nlnl = qr{(?<![^\012])\015?\012};
333
334our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
335our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
244 336
245sub http_request($$@) { 337sub http_request($$@) {
246 my $cb = pop; 338 my $cb = pop;
247 my ($method, $url, %arg) = @_; 339 my ($method, $url, %arg) = @_;
248 340
249 my %hdr; 341 my %hdr;
342
343 $arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx};
344 $arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
250 345
251 $method = uc $method; 346 $method = uc $method;
252 347
253 if (my $hdr = $arg{headers}) { 348 if (my $hdr = $arg{headers}) {
254 while (my ($k, $v) = each %$hdr) { 349 while (my ($k, $v) = each %$hdr) {
… …
256 } 351 }
257 } 352 }
258 353
259 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 354 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
260 355
261 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url }) 356 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
262 if $recurse < 0; 357 if $recurse < 0;
263 358
264 my $proxy = $arg{proxy} || $PROXY; 359 my $proxy = $arg{proxy} || $PROXY;
265 my $timeout = $arg{timeout} || $TIMEOUT; 360 my $timeout = $arg{timeout} || $TIMEOUT;
266 361
267 $hdr{"user-agent"} ||= $USERAGENT;
268
269 my ($uscheme, $uauthority, $upath, $query, $fragment) = 362 my ($uscheme, $uauthority, $upath, $query, $fragment) =
270 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 363 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
271 364
272 $uscheme = lc $uscheme; 365 $uscheme = lc $uscheme;
273 366
274 my $uport = $uscheme eq "http" ? 80 367 my $uport = $uscheme eq "http" ? 80
275 : $uscheme eq "https" ? 443 368 : $uscheme eq "https" ? 443
276 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url }); 369 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });
277
278 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
279 370
280 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 371 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
281 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url }); 372 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
282 373
283 my $uhost = $1; 374 my $uhost = $1;
284 $uport = $2 if defined $2; 375 $uport = $2 if defined $2;
376
377 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";
285 378
286 $uhost =~ s/^\[(.*)\]$/$1/; 379 $uhost =~ s/^\[(.*)\]$/$1/;
287 $upath .= "?$query" if length $query; 380 $upath .= "?$query" if length $query;
288 381
289 $upath =~ s%^/?%/%; 382 $upath =~ s%^/?%/%;
… …
320 } 413 }
321 414
322 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path 415 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
323 416
324 if ($proxy) { 417 if ($proxy) {
325 ($rhost, $rport, $rscheme, $rpath) = (@$proxy, $url); 418 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
419
420 $rscheme = "http" unless defined $rscheme;
326 421
327 # don't support https requests over https-proxy transport, 422 # don't support https requests over https-proxy transport,
328 # can't be done with tls as spec'ed. 423 # can't be done with tls as spec'ed, unless you double-encrypt.
329 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; 424 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
330 } else { 425 } else {
331 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); 426 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
332 } 427 }
333 428
334 $hdr{host} = $uhost; 429 # leave out fragment and query string, just a heuristic
430 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
431 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};
432
335 $hdr{"content-length"} = length $arg{body}; 433 $hdr{"content-length"} = length $arg{body};
336 434
337 my %state = (connect_guard => 1); 435 my %state = (connect_guard => 1);
338 436
339 _get_slot $uhost, sub { 437 _get_slot $uhost, sub {
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341 439
342 return unless $state{connect_guard}; 440 return unless $state{connect_guard};
343 441
344 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 442 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
345 $state{fh} = shift 443 $state{fh} = shift
444 or do {
445 my $err = "$!";
446 %state = ();
346 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); 447 return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
448 };
449
347 pop; # free memory, save a tree 450 pop; # free memory, save a tree
348 451
349 return unless delete $state{connect_guard}; 452 return unless delete $state{connect_guard};
350 453
351 # get handle 454 # get handle
352 $state{handle} = new AnyEvent::Handle 455 $state{handle} = new AnyEvent::Handle
353 fh => $state{fh}, 456 fh => $state{fh},
354 timeout => $timeout; 457 timeout => $timeout,
458 peername => $rhost,
459 tls_ctx => $arg{tls_ctx};
355 460
356 # limit the number of persistent connections 461 # limit the number of persistent connections
357 # keepalive not yet supported 462 # keepalive not yet supported
358 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 463 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
359 ++$KA_COUNT{$_[1]}; 464 ++$KA_COUNT{$_[1]};
… …
365 delete $hdr{connection}; 470 delete $hdr{connection};
366 } 471 }
367 472
368 # (re-)configure handle 473 # (re-)configure handle
369 $state{handle}->on_error (sub { 474 $state{handle}->on_error (sub {
370 my $errno = "$!";
371 %state = (); 475 %state = ();
372 $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); 476 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
373 }); 477 });
374 $state{handle}->on_eof (sub { 478 $state{handle}->on_eof (sub {
375 %state = (); 479 %state = ();
376 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); 480 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
377 }); 481 });
378 482
379 $state{handle}->starttls ("connect") if $rscheme eq "https"; 483 $state{handle}->starttls ("connect") if $rscheme eq "https";
380 484
381 # handle actual, non-tunneled, request 485 # handle actual, non-tunneled, request
… …
383 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; 487 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
384 488
385 # send request 489 # send request
386 $state{handle}->push_write ( 490 $state{handle}->push_write (
387 "$method $rpath HTTP/1.0\015\012" 491 "$method $rpath HTTP/1.0\015\012"
388 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) 492 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
389 . "\015\012" 493 . "\015\012"
390 . (delete $arg{body}) 494 . (delete $arg{body})
391 ); 495 );
392 496
393 %hdr = (); # reduce memory usage, save a kitten 497 %hdr = (); # reduce memory usage, save a kitten
394 498
395 # status line 499 # status line
396 $state{handle}->push_read (line => $qr_nl, sub { 500 $state{handle}->push_read (line => $qr_nl, sub {
397 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 501 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
398 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url })); 502 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
399 503
400 my %hdr = ( # response headers 504 my %hdr = ( # response headers
401 HTTPVersion => ",$1", 505 HTTPVersion => ",$1",
402 Status => ",$2", 506 Status => ",$2",
403 Reason => ",$3", 507 Reason => ",$3",
404 URL => ",$url" 508 URL => ",$url"
405 ); 509 );
406 510
407 # headers, could be optimized a bit 511 # headers, could be optimized a bit
408 $state{handle}->unshift_read (line => $qr_nlnl, sub { 512 $state{handle}->unshift_read (line => $qr_nlnl, sub {
409 for ("$_[1]\012") { 513 for ("$_[1]") {
410 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 514 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
411 515
412 # we support spaces in field names, as lotus domino 516 # things seen, not parsed:
413 # creates them (actually spaces around seperators 517 # p3pP="NON CUR OTPi OUR NOR UNI"
414 # are strictly allowed in http, they are a security issue). 518
415 $hdr{lc $1} .= ",$2" 519 $hdr{lc $1} .= ",$2"
416 while /\G 520 while /\G
417 ([^:\000-\037]+): 521 ([^:\000-\037]*):
418 [\011\040]* 522 [\011\040]*
419 ((?: [^\012]+ | \012[\011\040] )*) 523 ((?: [^\012]+ | \012[\011\040] )*)
420 \012 524 \012
421 /gxc; 525 /gxc;
422 526
423 /\G$/ 527 /\G$/
424 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url })); 528 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
425 } 529 }
426 530
427 substr $_, 0, 1, "" 531 substr $_, 0, 1, ""
428 for values %hdr; 532 for values %hdr;
429 533
534 # redirect handling
535 # microsoft and other shitheads don't give a shit for following standards,
536 # try to support some common forms of broken Location headers.
537 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
538 $hdr{location} =~ s/^\.\/+//;
539
540 my $url = "$rscheme://$uhost:$uport";
541
542 unless ($hdr{location} =~ s/^\///) {
543 $url .= $upath;
544 $url =~ s/\/[^\/]*$//;
545 }
546
547 $hdr{location} = "$url/$hdr{location}";
548 }
549
550 my $redirect;
551
552 if ($recurse) {
553 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
554 # apparently, mozilla et al. just change POST to GET here
555 # more research is needed before we do the same
556 $redirect = 1;
557 } elsif ($hdr{Status} == 303) {
558 # even http/1.1 is unclear on how to mutate the method
559 $method = "GET" unless $method eq "HEAD";
560 $redirect = 1;
561 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) {
562 $redirect = 1;
563 }
564 }
565
430 my $finish = sub { 566 my $finish = sub {
431 $state{handle}->destroy; 567 $state{handle}->destroy if $state{handle};
432 %state = (); 568 %state = ();
433 569
434 # set-cookie processing 570 # set-cookie processing
435 if ($arg{cookie_jar}) { 571 if ($arg{cookie_jar}) {
436 for ($hdr{"set-cookie"}) { 572 for ($_[1]{"set-cookie"}) {
437 # parse NAME=VALUE 573 # parse NAME=VALUE
438 my @kv; 574 my @kv;
439 575
440 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { 576 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
441 my $name = $1; 577 my $name = $1;
… …
479 615
480 redo if /\G\s*,/gc; 616 redo if /\G\s*,/gc;
481 } 617 }
482 } 618 }
483 619
484 # microsoft and other shitheads don't give a shit for following standards, 620 if ($redirect && exists $hdr{location}) {
485 # try to support some common forms of broken Location headers. 621 # we ignore any errors, as it is very common to receive
486 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 622 # Content-Length != 0 but no actual body
487 $_[1]{location} =~ s/^\.\/+//; 623 # we also access %hdr, as $_[1] might be an erro
488
489 my $url = "$rscheme://$uhost:$uport";
490
491 unless ($_[1]{location} =~ s/^\///) {
492 $url .= $upath;
493 $url =~ s/\/[^\/]*$//;
494 }
495
496 $_[1]{location} = "$url/$_[1]{location}";
497 }
498
499 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
500 # apparently, mozilla et al. just change POST to GET here
501 # more research is needed before we do the same
502 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
503 } elsif ($_[1]{Status} == 303 && $recurse) {
504 # even http/1.1 is unclear on how to mutate the method
505 $method = "GET" unless $method eq "HEAD";
506 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 624 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
507 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
508 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
509 } else { 625 } else {
510 $cb->($_[0], $_[1]); 626 $cb->($_[0], $_[1]);
511 } 627 }
512 }; 628 };
513 629
514 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { 630 my $len = $hdr{"content-length"};
631
632 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
633 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
634 } elsif (
635 $hdr{Status} =~ /^(?:1..|[23]04)$/
636 or $method eq "HEAD"
637 or (defined $len && !$len)
638 ) {
639 # no body
515 $finish->(undef, \%hdr); 640 $finish->("", \%hdr);
516 } else { 641 } else {
517 if (exists $hdr{"content-length"}) { 642 # body handling, four different code paths
518 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 643 # for want_body_handle, on_body (2x), normal (2x)
519 # could cache persistent connection now 644 # we might read too much here, but it does not matter yet (no pers. connections)
520 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 645 if (!$redirect && $arg{want_body_handle}) {
521 # but we don't, due to misdesigns, this is annoyingly complex 646 $_[0]->on_eof (undef);
647 $_[0]->on_error (undef);
648 $_[0]->on_read (undef);
649
650 $finish->(delete $state{handle}, \%hdr);
651
652 } elsif ($arg{on_body}) {
653 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
654 if ($len) {
655 $_[0]->on_eof (undef);
656 $_[0]->on_read (sub {
657 $len -= length $_[0]{rbuf};
658
659 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
660 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
661
662 $len > 0
663 or $finish->("", \%hdr);
522 }; 664 });
523 665 } else {
666 $_[0]->on_eof (sub {
524 $finish->($_[1], \%hdr); 667 $finish->("", \%hdr);
668 });
669 $_[0]->on_read (sub {
670 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
671 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
672 });
525 }); 673 }
526 } else { 674 } else {
527 # too bad, need to read until we get an error or EOF,
528 # no way to detect winged data.
529 $_[0]->on_error (sub {
530 $finish->($_[0]{rbuf}, \%hdr);
531 });
532 $_[0]->on_eof (undef); 675 $_[0]->on_eof (undef);
676
677 if ($len) {
678 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
679 $_[0]->on_read (sub {
680 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
681 if $len <= length $_[0]{rbuf};
682 });
683 } else {
684 $_[0]->on_error (sub {
685 $! == Errno::EPIPE || !$!
686 ? $finish->(delete $_[0]{rbuf}, \%hdr)
687 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
688 });
533 $_[0]->on_read (sub { }); 689 $_[0]->on_read (sub { });
690 }
534 } 691 }
535 } 692 }
536 }); 693 });
537 }); 694 });
538 }; 695 };
… …
543 700
544 # maybe re-use $uauthority with patched port? 701 # maybe re-use $uauthority with patched port?
545 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); 702 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
546 $state{handle}->push_read (line => $qr_nlnl, sub { 703 $state{handle}->push_read (line => $qr_nlnl, sub {
547 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 704 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
548 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid proxy connect response ($_[1])", URL => $url })); 705 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
549 706
550 if ($2 == 200) { 707 if ($2 == 200) {
551 $rpath = $upath; 708 $rpath = $upath;
552 &$handle_actual_request; 709 &$handle_actual_request;
553 } else { 710 } else {
… …
557 }); 714 });
558 } else { 715 } else {
559 &$handle_actual_request; 716 &$handle_actual_request;
560 } 717 }
561 718
562 }, sub { 719 }, $arg{on_prepare} || sub { $timeout };
563 $timeout
564 };
565 }; 720 };
566 721
567 defined wantarray && AnyEvent::Util::guard { %state = () } 722 defined wantarray && AnyEvent::Util::guard { %state = () }
568} 723}
569 724
… …
599The default value for the C<recurse> request parameter (default: C<10>). 754The default value for the C<recurse> request parameter (default: C<10>).
600 755
601=item $AnyEvent::HTTP::USERAGENT 756=item $AnyEvent::HTTP::USERAGENT
602 757
603The default value for the C<User-Agent> header (the default is 758The default value for the C<User-Agent> header (the default is
604C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 759C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
605 760
606=item $AnyEvent::HTTP::MAX_PERSISTENT 761=item $AnyEvent::HTTP::MAX_PER_HOST
607 762
608The maximum number of persistent connections to keep open (default: 8). 763The maximum number of concurrent connections to the same host (identified
764by the hostname). If the limit is exceeded, then the additional requests
765are queued until previous connections are closed.
609 766
610Not implemented currently. 767The default value for this is C<4>, and it is highly advisable to not
611 768increase it.
612=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
613
614The maximum time to cache a persistent connection, in seconds (default: 2).
615
616Not implemented currently.
617 769
618=item $AnyEvent::HTTP::ACTIVE 770=item $AnyEvent::HTTP::ACTIVE
619 771
620The number of active connections. This is not the number of currently 772The number of active connections. This is not the number of currently
621running requests, but the number of currently open and non-idle TCP 773running requests, but the number of currently open and non-idle TCP
… …
639=head1 AUTHOR 791=head1 AUTHOR
640 792
641 Marc Lehmann <schmorp@schmorp.de> 793 Marc Lehmann <schmorp@schmorp.de>
642 http://home.schmorp.de/ 794 http://home.schmorp.de/
643 795
796With many thanks to Дмитрий Шалашов, who provided countless
797testcases and bugreports.
798
644=cut 799=cut
645 800
6461 8011
647 802

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