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 1.31 by root, Fri Oct 24 01:25:54 2008 UTC vs.
Revision 1.48 by root, Wed Aug 5 16:09:10 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 4.8 ();
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 = '1.05'; 53our $VERSION = '1.42';
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
107requested URL when following redirects). 107requested URL when following redirects).
108 108
109If the server sends a header multiple lines, then their contents will be 109If the server sends a header multiple times, then their contents will be
110joined together with a command (C<,>). 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
145send at all).
143 146
144=item timeout => $seconds 147=item timeout => $seconds
145 148
146The time-out to use for various stages - each connect attempt will reset 149The time-out to use for various stages - each connect attempt will reset
147the timeout, as will read or write activity. Default timeout is 5 minutes. 150the timeout, as will read or write activity. Default timeout is 5 minutes.
… …
149=item proxy => [$host, $port[, $scheme]] or undef 152=item proxy => [$host, $port[, $scheme]] or undef
150 153
151Use the given http proxy for all requests. If not specified, then the 154Use the given http proxy for all requests. If not specified, then the
152default proxy (as specified by C<$ENV{http_proxy}>) is used. 155default proxy (as specified by C<$ENV{http_proxy}>) is used.
153 156
154C<$scheme> must be either missing or C<http> for HTTP, or C<https> for 157C<$scheme> must be either missing, C<http> for HTTP or C<https> for
155HTTPS. 158HTTPS.
156 159
157=item body => $string 160=item body => $string
158 161
159The request body, usually empty. Will be-sent as-is (future versions of 162The request body, usually empty. Will be-sent as-is (future versions of
… …
165based on the original netscape specification. 168based on the original netscape specification.
166 169
167The C<$hash_ref> must be an (initially empty) hash reference which will 170The C<$hash_ref> must be an (initially empty) hash reference which will
168get updated automatically. It is possible to save the cookie_jar to 171get updated automatically. It is possible to save the cookie_jar to
169persistent storage with something like JSON or Storable, but this is not 172persistent storage with something like JSON or Storable, but this is not
170recommended, as expire times are currently being ignored. 173recommended, as expiry times are currently being ignored.
171 174
172Note that this cookie implementation is not of very high quality, nor 175Note that this cookie implementation is not of very high quality, nor
173meant to be complete. If you want complete cookie management you have to 176meant 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 177do 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 178cookie-using sites working. Cookies are a privacy disaster, do not use
176them unless required to. 179them unless required to.
180
181=item tls_ctx => $scheme | $tls_ctx
182
183Specifies the AnyEvent::TLS context to be used for https connections. This
184parameter follows the same rules as the C<tls_ctx> parameter to
185L<AnyEvent::Handle>, but additionally, the two strings C<low> or
186C<high> can be specified, which give you a predefined low-security (no
187verification, highest compatibility) and high-security (CA and common-name
188verification) TLS context.
189
190The default for this option is C<low>, which could be interpreted as "give
191me the page, no matter what".
192
193=item on_header => $callback->($headers)
194
195When specified, this callback will be called with the header hash as soon
196as headers have been successfully received from the remote server (not on
197locally-generated errors).
198
199It has to return either true (in which case AnyEvent::HTTP will continue),
200or false, in which case AnyEvent::HTTP will cancel the download (and call
201the finish callback with an error code of C<598>).
202
203This callback is useful, among other things, to quickly reject unwanted
204content, which, if it is supposed to be rare, can be faster than first
205doing a C<HEAD> request.
206
207Example: cancel the request unless the content-type is "text/html".
208
209 on_header => sub {
210 $_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/
211 },
212
213=item on_body => $callback->($partial_body, $headers)
214
215When specified, all body data will be passed to this callback instead of
216to the completion callback. The completion callback will get the empty
217string instead of the body data.
218
219It has to return either true (in which case AnyEvent::HTTP will continue),
220or false, in which case AnyEvent::HTTP will cancel the download (and call
221the completion callback with an error code of C<598>).
222
223This callback is useful when the data is too large to be held in memory
224(so the callback writes it to a file) or when only some information should
225be extracted, or when the body should be processed incrementally.
226
227It is usually preferred over doing your own body handling via
228C<want_body_handle>, but in case of streaming APIs, where HTTP is
229only used to create a connection, C<want_body_handle> is the better
230alternative, as it allows you to install your own event handler, reducing
231resource usage.
232
233=item want_body_handle => $enable
234
235When enabled (default is disabled), the behaviour of AnyEvent::HTTP
236changes considerably: after parsing the headers, and instead of
237downloading the body (if any), the completion callback will be
238called. Instead of the C<$body> argument containing the body data, the
239callback will receive the L<AnyEvent::Handle> object associated with the
240connection. In error cases, C<undef> will be passed. When there is no body
241(e.g. status C<304>), the empty string will be passed.
242
243The handle object might or might not be in TLS mode, might be connected to
244a proxy, be a persistent connection etc., and configured in unspecified
245ways. The user is responsible for this handle (it will not be used by this
246module anymore).
247
248This is useful with some push-type services, where, after the initial
249headers, an interactive protocol is used (typical example would be the
250push-style twitter API which starts a JSON/XML stream).
251
252If you think you need this, first have a look at C<on_body>, to see if
253that doesn't solve your problem in a better way.
177 254
178=back 255=back
179 256
180Example: make a simple HTTP GET request for http://www.nethype.de/ 257Example: make a simple HTTP GET request for http://www.nethype.de/
181 258
… …
237 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 314 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
238 315
239 _slot_schedule $_[0]; 316 _slot_schedule $_[0];
240} 317}
241 318
319our $qr_nl = qr{\015?\012};
320our $qr_nlnl = qr{(?<![^\012])\015?\012};
321
322our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
323our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
324
242sub http_request($$@) { 325sub http_request($$@) {
243 my $cb = pop; 326 my $cb = pop;
244 my ($method, $url, %arg) = @_; 327 my ($method, $url, %arg) = @_;
245 328
246 my %hdr; 329 my %hdr;
330
331 $arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx};
332 $arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
247 333
248 $method = uc $method; 334 $method = uc $method;
249 335
250 if (my $hdr = $arg{headers}) { 336 if (my $hdr = $arg{headers}) {
251 while (my ($k, $v) = each %$hdr) { 337 while (my ($k, $v) = each %$hdr) {
… …
253 } 339 }
254 } 340 }
255 341
256 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 342 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
257 343
258 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url }) 344 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
259 if $recurse < 0; 345 if $recurse < 0;
260 346
261 my $proxy = $arg{proxy} || $PROXY; 347 my $proxy = $arg{proxy} || $PROXY;
262 my $timeout = $arg{timeout} || $TIMEOUT; 348 my $timeout = $arg{timeout} || $TIMEOUT;
263 349
264 $hdr{"user-agent"} ||= $USERAGENT;
265
266 my ($uscheme, $uauthority, $upath, $query, $fragment) = 350 my ($uscheme, $uauthority, $upath, $query, $fragment) =
267 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 351 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
268 352
269 $uscheme = lc $uscheme; 353 $uscheme = lc $uscheme;
270 354
271 my $uport = $uscheme eq "http" ? 80 355 my $uport = $uscheme eq "http" ? 80
272 : $uscheme eq "https" ? 443 356 : $uscheme eq "https" ? 443
273 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url }); 357 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });
274
275 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
276 358
277 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 359 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
278 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url }); 360 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
279 361
280 my $uhost = $1; 362 my $uhost = $1;
281 $uport = $2 if defined $2; 363 $uport = $2 if defined $2;
364
365 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";
282 366
283 $uhost =~ s/^\[(.*)\]$/$1/; 367 $uhost =~ s/^\[(.*)\]$/$1/;
284 $upath .= "?$query" if length $query; 368 $upath .= "?$query" if length $query;
285 369
286 $upath =~ s%^/?%/%; 370 $upath =~ s%^/?%/%;
… …
317 } 401 }
318 402
319 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path 403 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
320 404
321 if ($proxy) { 405 if ($proxy) {
322 ($rhost, $rport, $rscheme, $rpath) = (@$proxy, $url); 406 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
407
408 $rscheme = "http" unless defined $rscheme;
323 409
324 # don't support https requests over https-proxy transport, 410 # don't support https requests over https-proxy transport,
325 # can't be done with tls as spec'ed. 411 # can't be done with tls as spec'ed, unless you double-encrypt.
326 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; 412 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
327 } else { 413 } else {
328 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); 414 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
329 } 415 }
330 416
331 $hdr{host} = $uhost; 417 # leave out fragment and query string, just a heuristic
418 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
419 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};
420
332 $hdr{"content-length"} = length $arg{body}; 421 $hdr{"content-length"} = length $arg{body};
333 422
334 my %state = (connect_guard => 1); 423 my %state = (connect_guard => 1);
335 424
336 _get_slot $uhost, sub { 425 _get_slot $uhost, sub {
… …
338 427
339 return unless $state{connect_guard}; 428 return unless $state{connect_guard};
340 429
341 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 430 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
342 $state{fh} = shift 431 $state{fh} = shift
432 or do {
433 my $err = "$!";
434 %state = ();
343 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); 435 return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
436 };
344 437
345 delete $state{connect_guard}; # reduce memory usage, save a tree 438 pop; # free memory, save a tree
439
440 return unless delete $state{connect_guard};
346 441
347 # get handle 442 # get handle
348 $state{handle} = new AnyEvent::Handle 443 $state{handle} = new AnyEvent::Handle
349 fh => $state{fh}; 444 fh => $state{fh},
445 timeout => $timeout,
446 peername => $rhost,
447 tls_ctx => $arg{tls_ctx};
350 448
351 # limit the number of persistent connections 449 # limit the number of persistent connections
450 # keepalive not yet supported
352 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 451 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
353 ++$KA_COUNT{$_[1]}; 452 ++$KA_COUNT{$_[1]};
354 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 453 $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
454 --$KA_COUNT{$_[1]}
455 };
355 $hdr{connection} = "keep-alive"; 456 $hdr{connection} = "keep-alive";
356 delete $hdr{connection}; # keep-alive not yet supported
357 } else { 457 } else {
358 delete $hdr{connection}; 458 delete $hdr{connection};
359 } 459 }
360 460
361 # (re-)configure handle 461 # (re-)configure handle
362 $state{handle}->timeout ($timeout);
363 $state{handle}->on_error (sub { 462 $state{handle}->on_error (sub {
364 my $errno = "$!";
365 %state = (); 463 %state = ();
366 $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); 464 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
367 }); 465 });
368 $state{handle}->on_eof (sub { 466 $state{handle}->on_eof (sub {
369 %state = (); 467 %state = ();
370 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); 468 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
371 }); 469 });
372 470
373 $state{handle}->starttls ("connect") if $rscheme eq "https"; 471 $state{handle}->starttls ("connect") if $rscheme eq "https";
374 472
375 # handle actual, non-tunneled, request 473 # handle actual, non-tunneled, request
376 my $handle_actual_request = sub { 474 my $handle_actual_request = sub {
377# $state{handle}->starttls ("connect") if $uscheme eq "https"; 475 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
378 476
379 # send request 477 # send request
380 $state{handle}->push_write ( 478 $state{handle}->push_write (
381 "$method $rpath HTTP/1.0\015\012" 479 "$method $rpath HTTP/1.0\015\012"
382 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) 480 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
383 . "\015\012" 481 . "\015\012"
384 . (delete $arg{body}) 482 . (delete $arg{body})
385 ); 483 );
386 484
387 %hdr = (); # reduce memory usage, save a kitten 485 %hdr = (); # reduce memory usage, save a kitten
388 486
389 # status line 487 # status line
390 $state{handle}->push_read (line => qr/\015?\012/, sub { 488 $state{handle}->push_read (line => $qr_nl, sub {
391 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 489 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
392 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url })); 490 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
393 491
394 my %hdr = ( # response headers 492 my %hdr = ( # response headers
395 HTTPVersion => ",$1", 493 HTTPVersion => ",$1",
396 Status => ",$2", 494 Status => ",$2",
397 Reason => ",$3", 495 Reason => ",$3",
398 URL => ",$url" 496 URL => ",$url"
399 ); 497 );
400 498
401 # headers, could be optimized a bit 499 # headers, could be optimized a bit
402 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 500 $state{handle}->unshift_read (line => $qr_nlnl, sub {
403 for ("$_[1]\012") { 501 for ("$_[1]") {
404 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 502 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
405 503
406 # we support spaces in field names, as lotus domino 504 # things seen, not parsed:
407 # creates them (actually spaces around seperators 505 # p3pP="NON CUR OTPi OUR NOR UNI"
408 # are strictly allowed in http, they are a security issue). 506
409 $hdr{lc $1} .= ",$2" 507 $hdr{lc $1} .= ",$2"
410 while /\G 508 while /\G
411 ([^:\000-\037]+): 509 ([^:\000-\037]*):
412 [\011\040]* 510 [\011\040]*
413 ((?: [^\012]+ | \012[\011\040] )*) 511 ((?: [^\012]+ | \012[\011\040] )*)
414 \012 512 \012
415 /gxc; 513 /gxc;
416 514
417 /\G$/ 515 /\G$/
418 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url })); 516 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
419 } 517 }
420 518
421 substr $_, 0, 1, "" 519 substr $_, 0, 1, ""
422 for values %hdr; 520 for values %hdr;
423 521
522 # redirect handling
523 # microsoft and other shitheads don't give a shit for following standards,
524 # try to support some common forms of broken Location headers.
525 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
526 $hdr{location} =~ s/^\.\/+//;
527
528 my $url = "$rscheme://$uhost:$uport";
529
530 unless ($hdr{location} =~ s/^\///) {
531 $url .= $upath;
532 $url =~ s/\/[^\/]*$//;
533 }
534
535 $hdr{location} = "$url/$hdr{location}";
536 }
537
538 my $redirect;
539
540 if ($recurse) {
541 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
542 # apparently, mozilla et al. just change POST to GET here
543 # more research is needed before we do the same
544 $redirect = 1;
545 } elsif ($hdr{Status} == 303) {
546 # even http/1.1 is unclear on how to mutate the method
547 $method = "GET" unless $method eq "HEAD";
548 $redirect = 1;
549 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) {
550 $redirect = 1;
551 }
552 }
553
424 my $finish = sub { 554 my $finish = sub {
425 # TODO: use destroy method, when/if available
426 #$state{handle}->destroy; 555 $state{handle}->destroy if $state{handle};
427 $state{handle}->on_eof (undef);
428 $state{handle}->on_error (undef);
429 %state = (); 556 %state = ();
430 557
431 # set-cookie processing 558 # set-cookie processing
432 if ($arg{cookie_jar}) { 559 if ($arg{cookie_jar}) {
433 for ($hdr{"set-cookie"}) { 560 for ($_[1]{"set-cookie"}) {
434 # parse NAME=VALUE 561 # parse NAME=VALUE
435 my @kv; 562 my @kv;
436 563
437 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { 564 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
438 my $name = $1; 565 my $name = $1;
… …
476 603
477 redo if /\G\s*,/gc; 604 redo if /\G\s*,/gc;
478 } 605 }
479 } 606 }
480 607
481 # microsoft and other shitheads don't give a shit for following standards, 608 if ($redirect && exists $hdr{location}) {
482 # try to support some common forms of broken Location headers. 609 # we ignore any errors, as it is very common to receive
483 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 610 # Content-Length != 0 but no actual body
484 $_[1]{location} =~ s/^\.\/+//; 611 # we also access %hdr, as $_[1] might be an erro
485
486 my $url = "$rscheme://$uhost:$uport";
487
488 unless ($_[1]{location} =~ s/^\///) {
489 $url .= $upath;
490 $url =~ s/\/[^\/]*$//;
491 }
492
493 $_[1]{location} = "$url/$_[1]{location}";
494 }
495
496 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
497 # apparently, mozilla et al. just change POST to GET here
498 # more research is needed before we do the same
499 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
500 } elsif ($_[1]{Status} == 303 && $recurse) {
501 # even http/1.1 is unclear on how to mutate the method
502 $method = "GET" unless $method eq "HEAD";
503 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 612 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
504 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
505 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
506 } else { 613 } else {
507 $cb->($_[0], $_[1]); 614 $cb->($_[0], $_[1]);
508 } 615 }
509 }; 616 };
510 617
511 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { 618 my $len = $hdr{"content-length"};
619
620 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
621 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
622 } elsif (
623 $hdr{Status} =~ /^(?:1..|[23]04)$/
624 or $method eq "HEAD"
625 or (defined $len && !$len)
626 ) {
627 # no body
512 $finish->(undef, \%hdr); 628 $finish->("", \%hdr);
513 } else { 629 } else {
514 if (exists $hdr{"content-length"}) { 630 # body handling, four different code paths
515 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 631 # for want_body_handle, on_body (2x), normal (2x)
516 # could cache persistent connection now 632 # we might read too much here, but it does not matter yet (no pers. connections)
517 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 633 if (!$redirect && $arg{want_body_handle}) {
518 # but we don't, due to misdesigns, this is annoyingly complex 634 $_[0]->on_eof (undef);
635 $_[0]->on_error (undef);
636 $_[0]->on_read (undef);
637
638 $finish->(delete $state{handle}, \%hdr);
639
640 } elsif ($arg{on_body}) {
641 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
642 if ($len) {
643 $_[0]->on_eof (undef);
644 $_[0]->on_read (sub {
645 $len -= length $_[0]{rbuf};
646
647 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
648 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
649
650 $len > 0
651 or $finish->("", \%hdr);
519 }; 652 });
520 653 } else {
654 $_[0]->on_eof (sub {
521 $finish->($_[1], \%hdr); 655 $finish->("", \%hdr);
656 });
657 $_[0]->on_read (sub {
658 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
659 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
660 });
522 }); 661 }
523 } else { 662 } else {
524 # too bad, need to read until we get an error or EOF,
525 # no way to detect winged data.
526 $_[0]->on_error (sub {
527 $finish->($_[0]{rbuf}, \%hdr);
528 });
529 $_[0]->on_eof (undef); 663 $_[0]->on_eof (undef);
664
665 if ($len) {
666 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
667 $_[0]->on_read (sub {
668 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
669 if $len <= length $_[0]{rbuf};
670 });
671 } else {
672 $_[0]->on_error (sub {
673 $! == Errno::EPIPE || !$!
674 ? $finish->(delete $_[0]{rbuf}, \%hdr)
675 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
676 });
530 $_[0]->on_read (sub { }); 677 $_[0]->on_read (sub { });
678 }
531 } 679 }
532 } 680 }
533 }); 681 });
534 }); 682 });
535 }; 683 };
… …
538 if ($proxy && $uscheme eq "https") { 686 if ($proxy && $uscheme eq "https") {
539 # oh dear, we have to wrap it into a connect request 687 # oh dear, we have to wrap it into a connect request
540 688
541 # maybe re-use $uauthority with patched port? 689 # maybe re-use $uauthority with patched port?
542 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); 690 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
543 $state{handle}->push_read (line => qr/\015?\012\015?\012/, sub { 691 $state{handle}->push_read (line => $qr_nlnl, sub {
544 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 692 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
545 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid proxy connect response ($_[1])", URL => $url })); 693 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
546 694
547 if ($2 == 200) { 695 if ($2 == 200) {
548 $rpath = $upath; 696 $rpath = $upath;
549 &$handle_actual_request; 697 &$handle_actual_request;
550 } else { 698 } else {
… …
596The default value for the C<recurse> request parameter (default: C<10>). 744The default value for the C<recurse> request parameter (default: C<10>).
597 745
598=item $AnyEvent::HTTP::USERAGENT 746=item $AnyEvent::HTTP::USERAGENT
599 747
600The default value for the C<User-Agent> header (the default is 748The default value for the C<User-Agent> header (the default is
601C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 749C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
602 750
603=item $AnyEvent::HTTP::MAX_PERSISTENT 751=item $AnyEvent::HTTP::MAX_PER_HOST
604 752
605The maximum number of persistent connections to keep open (default: 8). 753The maximum number of concurrent connections to the same host (identified
754by the hostname). If the limit is exceeded, then the additional requests
755are queued until previous connections are closed.
606 756
607Not implemented currently. 757The default value for this is C<4>, and it is highly advisable to not
608 758increase it.
609=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
610
611The maximum time to cache a persistent connection, in seconds (default: 2).
612
613Not implemented currently.
614 759
615=item $AnyEvent::HTTP::ACTIVE 760=item $AnyEvent::HTTP::ACTIVE
616 761
617The number of active connections. This is not the number of currently 762The number of active connections. This is not the number of currently
618running requests, but the number of currently open and non-idle TCP 763running requests, but the number of currently open and non-idle TCP
… …
636=head1 AUTHOR 781=head1 AUTHOR
637 782
638 Marc Lehmann <schmorp@schmorp.de> 783 Marc Lehmann <schmorp@schmorp.de>
639 http://home.schmorp.de/ 784 http://home.schmorp.de/
640 785
786With many thanks to Дмитрий Шалашов, who provided countless
787testcases and bugreports.
788
641=cut 789=cut
642 790
6431 7911
644 792

Diff Legend

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