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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.31 by root, Fri Oct 24 01:25:54 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 = '1.05'; 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
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
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
331our $qr_nl = qr{\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" };
336
242sub http_request($$@) { 337sub http_request($$@) {
243 my $cb = pop; 338 my $cb = pop;
244 my ($method, $url, %arg) = @_; 339 my ($method, $url, %arg) = @_;
245 340
246 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";
247 345
248 $method = uc $method; 346 $method = uc $method;
249 347
250 if (my $hdr = $arg{headers}) { 348 if (my $hdr = $arg{headers}) {
251 while (my ($k, $v) = each %$hdr) { 349 while (my ($k, $v) = each %$hdr) {
… …
253 } 351 }
254 } 352 }
255 353
256 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 354 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
257 355
258 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url }) 356 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
259 if $recurse < 0; 357 if $recurse < 0;
260 358
261 my $proxy = $arg{proxy} || $PROXY; 359 my $proxy = $arg{proxy} || $PROXY;
262 my $timeout = $arg{timeout} || $TIMEOUT; 360 my $timeout = $arg{timeout} || $TIMEOUT;
263 361
264 $hdr{"user-agent"} ||= $USERAGENT;
265
266 my ($uscheme, $uauthority, $upath, $query, $fragment) = 362 my ($uscheme, $uauthority, $upath, $query, $fragment) =
267 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 363 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
268 364
269 $uscheme = lc $uscheme; 365 $uscheme = lc $uscheme;
270 366
271 my $uport = $uscheme eq "http" ? 80 367 my $uport = $uscheme eq "http" ? 80
272 : $uscheme eq "https" ? 443 368 : $uscheme eq "https" ? 443
273 : 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 });
274
275 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
276 370
277 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 371 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
278 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url }); 372 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
279 373
280 my $uhost = $1; 374 my $uhost = $1;
281 $uport = $2 if defined $2; 375 $uport = $2 if defined $2;
376
377 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";
282 378
283 $uhost =~ s/^\[(.*)\]$/$1/; 379 $uhost =~ s/^\[(.*)\]$/$1/;
284 $upath .= "?$query" if length $query; 380 $upath .= "?$query" if length $query;
285 381
286 $upath =~ s%^/?%/%; 382 $upath =~ s%^/?%/%;
… …
317 } 413 }
318 414
319 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path 415 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
320 416
321 if ($proxy) { 417 if ($proxy) {
322 ($rhost, $rport, $rscheme, $rpath) = (@$proxy, $url); 418 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
419
420 $rscheme = "http" unless defined $rscheme;
323 421
324 # don't support https requests over https-proxy transport, 422 # don't support https requests over https-proxy transport,
325 # can't be done with tls as spec'ed. 423 # can't be done with tls as spec'ed, unless you double-encrypt.
326 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; 424 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
327 } else { 425 } else {
328 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); 426 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
329 } 427 }
330 428
331 $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
332 $hdr{"content-length"} = length $arg{body}; 433 $hdr{"content-length"} = length $arg{body};
333 434
334 my %state = (connect_guard => 1); 435 my %state = (connect_guard => 1);
335 436
336 _get_slot $uhost, sub { 437 _get_slot $uhost, sub {
… …
338 439
339 return unless $state{connect_guard}; 440 return unless $state{connect_guard};
340 441
341 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 442 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
342 $state{fh} = shift 443 $state{fh} = shift
444 or do {
445 my $err = "$!";
446 %state = ();
343 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); 447 return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
448 };
344 449
345 delete $state{connect_guard}; # reduce memory usage, save a tree 450 pop; # free memory, save a tree
451
452 return unless delete $state{connect_guard};
346 453
347 # get handle 454 # get handle
348 $state{handle} = new AnyEvent::Handle 455 $state{handle} = new AnyEvent::Handle
349 fh => $state{fh}; 456 fh => $state{fh},
457 timeout => $timeout,
458 peername => $rhost,
459 tls_ctx => $arg{tls_ctx};
350 460
351 # limit the number of persistent connections 461 # limit the number of persistent connections
462 # keepalive not yet supported
352 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 463 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
353 ++$KA_COUNT{$_[1]}; 464 ++$KA_COUNT{$_[1]};
354 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 465 $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
466 --$KA_COUNT{$_[1]}
467 };
355 $hdr{connection} = "keep-alive"; 468 $hdr{connection} = "keep-alive";
356 delete $hdr{connection}; # keep-alive not yet supported
357 } else { 469 } else {
358 delete $hdr{connection}; 470 delete $hdr{connection};
359 } 471 }
360 472
361 # (re-)configure handle 473 # (re-)configure handle
362 $state{handle}->timeout ($timeout);
363 $state{handle}->on_error (sub { 474 $state{handle}->on_error (sub {
364 my $errno = "$!";
365 %state = (); 475 %state = ();
366 $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); 476 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
367 }); 477 });
368 $state{handle}->on_eof (sub { 478 $state{handle}->on_eof (sub {
369 %state = (); 479 %state = ();
370 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); 480 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
371 }); 481 });
372 482
373 $state{handle}->starttls ("connect") if $rscheme eq "https"; 483 $state{handle}->starttls ("connect") if $rscheme eq "https";
374 484
375 # handle actual, non-tunneled, request 485 # handle actual, non-tunneled, request
376 my $handle_actual_request = sub { 486 my $handle_actual_request = sub {
377# $state{handle}->starttls ("connect") if $uscheme eq "https"; 487 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
378 488
379 # send request 489 # send request
380 $state{handle}->push_write ( 490 $state{handle}->push_write (
381 "$method $rpath HTTP/1.0\015\012" 491 "$method $rpath HTTP/1.0\015\012"
382 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) 492 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
383 . "\015\012" 493 . "\015\012"
384 . (delete $arg{body}) 494 . (delete $arg{body})
385 ); 495 );
386 496
387 %hdr = (); # reduce memory usage, save a kitten 497 %hdr = (); # reduce memory usage, save a kitten
388 498
389 # status line 499 # status line
390 $state{handle}->push_read (line => qr/\015?\012/, sub { 500 $state{handle}->push_read (line => $qr_nl, sub {
391 $_[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
392 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 }));
393 503
394 my %hdr = ( # response headers 504 my %hdr = ( # response headers
395 HTTPVersion => ",$1", 505 HTTPVersion => ",$1",
396 Status => ",$2", 506 Status => ",$2",
397 Reason => ",$3", 507 Reason => ",$3",
398 URL => ",$url" 508 URL => ",$url"
399 ); 509 );
400 510
401 # headers, could be optimized a bit 511 # headers, could be optimized a bit
402 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 512 $state{handle}->unshift_read (line => $qr_nlnl, sub {
403 for ("$_[1]\012") { 513 for ("$_[1]") {
404 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.
405 515
406 # we support spaces in field names, as lotus domino 516 # things seen, not parsed:
407 # creates them (actually spaces around seperators 517 # p3pP="NON CUR OTPi OUR NOR UNI"
408 # are strictly allowed in http, they are a security issue). 518
409 $hdr{lc $1} .= ",$2" 519 $hdr{lc $1} .= ",$2"
410 while /\G 520 while /\G
411 ([^:\000-\037]+): 521 ([^:\000-\037]*):
412 [\011\040]* 522 [\011\040]*
413 ((?: [^\012]+ | \012[\011\040] )*) 523 ((?: [^\012]+ | \012[\011\040] )*)
414 \012 524 \012
415 /gxc; 525 /gxc;
416 526
417 /\G$/ 527 /\G$/
418 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 }));
419 } 529 }
420 530
421 substr $_, 0, 1, "" 531 substr $_, 0, 1, ""
422 for values %hdr; 532 for values %hdr;
423 533
534 # redirect handling
535 # microsoft and other shitheads don't give a shit for following standards,
536 # try to support some common forms of broken Location headers.
537 if ($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
424 my $finish = sub { 566 my $finish = sub {
425 # TODO: use destroy method, when/if available
426 #$state{handle}->destroy; 567 $state{handle}->destroy if $state{handle};
427 $state{handle}->on_eof (undef);
428 $state{handle}->on_error (undef);
429 %state = (); 568 %state = ();
430 569
431 # set-cookie processing 570 # set-cookie processing
432 if ($arg{cookie_jar}) { 571 if ($arg{cookie_jar}) {
433 for ($hdr{"set-cookie"}) { 572 for ($_[1]{"set-cookie"}) {
434 # parse NAME=VALUE 573 # parse NAME=VALUE
435 my @kv; 574 my @kv;
436 575
437 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { 576 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
438 my $name = $1; 577 my $name = $1;
… …
476 615
477 redo if /\G\s*,/gc; 616 redo if /\G\s*,/gc;
478 } 617 }
479 } 618 }
480 619
481 # microsoft and other shitheads don't give a shit for following standards, 620 if ($redirect && exists $hdr{location}) {
482 # try to support some common forms of broken Location headers. 621 # we ignore any errors, as it is very common to receive
483 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 622 # Content-Length != 0 but no actual body
484 $_[1]{location} =~ s/^\.\/+//; 623 # 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, $cb); 624 http_request ($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 { 625 } else {
507 $cb->($_[0], $_[1]); 626 $cb->($_[0], $_[1]);
508 } 627 }
509 }; 628 };
510 629
511 if ($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
512 $finish->(undef, \%hdr); 640 $finish->("", \%hdr);
513 } else { 641 } else {
514 if (exists $hdr{"content-length"}) { 642 # body handling, four different code paths
515 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 643 # for want_body_handle, on_body (2x), normal (2x)
516 # could cache persistent connection now 644 # we might read too much here, but it does not matter yet (no pers. connections)
517 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 645 if (!$redirect && $arg{want_body_handle}) {
518 # 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);
519 }; 664 });
520 665 } else {
666 $_[0]->on_eof (sub {
521 $finish->($_[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 });
522 }); 673 }
523 } else { 674 } 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); 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 });
530 $_[0]->on_read (sub { }); 689 $_[0]->on_read (sub { });
690 }
531 } 691 }
532 } 692 }
533 }); 693 });
534 }); 694 });
535 }; 695 };
… …
538 if ($proxy && $uscheme eq "https") { 698 if ($proxy && $uscheme eq "https") {
539 # oh dear, we have to wrap it into a connect request 699 # oh dear, we have to wrap it into a connect request
540 700
541 # maybe re-use $uauthority with patched port? 701 # 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"); 702 $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 { 703 $state{handle}->push_read (line => $qr_nlnl, sub {
544 $_[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
545 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 }));
546 706
547 if ($2 == 200) { 707 if ($2 == 200) {
548 $rpath = $upath; 708 $rpath = $upath;
549 &$handle_actual_request; 709 &$handle_actual_request;
550 } else { 710 } else {
… …
554 }); 714 });
555 } else { 715 } else {
556 &$handle_actual_request; 716 &$handle_actual_request;
557 } 717 }
558 718
559 }, sub { 719 }, $arg{on_prepare} || sub { $timeout };
560 $timeout
561 };
562 }; 720 };
563 721
564 defined wantarray && AnyEvent::Util::guard { %state = () } 722 defined wantarray && AnyEvent::Util::guard { %state = () }
565} 723}
566 724
… …
596The default value for the C<recurse> request parameter (default: C<10>). 754The default value for the C<recurse> request parameter (default: C<10>).
597 755
598=item $AnyEvent::HTTP::USERAGENT 756=item $AnyEvent::HTTP::USERAGENT
599 757
600The default value for the C<User-Agent> header (the default is 758The default value for the C<User-Agent> header (the default is
601C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 759C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
602 760
603=item $AnyEvent::HTTP::MAX_PERSISTENT 761=item $AnyEvent::HTTP::MAX_PER_HOST
604 762
605The 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.
606 766
607Not implemented currently. 767The default value for this is C<4>, and it is highly advisable to not
608 768increase it.
609=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
610
611The maximum time to cache a persistent connection, in seconds (default: 2).
612
613Not implemented currently.
614 769
615=item $AnyEvent::HTTP::ACTIVE 770=item $AnyEvent::HTTP::ACTIVE
616 771
617The number of active connections. This is not the number of currently 772The number of active connections. This is not the number of currently
618running requests, but the number of currently open and non-idle TCP 773running requests, but the number of currently open and non-idle TCP
… …
636=head1 AUTHOR 791=head1 AUTHOR
637 792
638 Marc Lehmann <schmorp@schmorp.de> 793 Marc Lehmann <schmorp@schmorp.de>
639 http://home.schmorp.de/ 794 http://home.schmorp.de/
640 795
796With many thanks to Дмитрий Шалашов, who provided countless
797testcases and bugreports.
798
641=cut 799=cut
642 800
6431 8011
644 802

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