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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.34 by root, Wed Oct 29 14:51:07 2008 UTC vs.
Revision 1.54 by root, Wed Jun 16 18:09:52 2010 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 = '1.44';
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"
378 unless exists $hdr{host};
285 379
286 $uhost =~ s/^\[(.*)\]$/$1/; 380 $uhost =~ s/^\[(.*)\]$/$1/;
287 $upath .= "?$query" if length $query; 381 $upath .= "?$query" if length $query;
288 382
289 $upath =~ s%^/?%/%; 383 $upath =~ s%^/?%/%;
… …
320 } 414 }
321 415
322 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path 416 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
323 417
324 if ($proxy) { 418 if ($proxy) {
325 ($rhost, $rport, $rscheme, $rpath) = (@$proxy, $url); 419 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
420
421 $rscheme = "http" unless defined $rscheme;
326 422
327 # don't support https requests over https-proxy transport, 423 # don't support https requests over https-proxy transport,
328 # can't be done with tls as spec'ed. 424 # can't be done with tls as spec'ed, unless you double-encrypt.
329 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; 425 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
330 } else { 426 } else {
331 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); 427 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
332 } 428 }
333 429
334 $hdr{host} = $uhost; 430 # leave out fragment and query string, just a heuristic
431 $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer};
432 $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"};
433
335 $hdr{"content-length"} = length $arg{body}; 434 $hdr{"content-length"} = length $arg{body}
435 if length $arg{body} || $method ne "GET";
336 436
337 my %state = (connect_guard => 1); 437 my %state = (connect_guard => 1);
338 438
339 _get_slot $uhost, sub { 439 _get_slot $uhost, sub {
340 $state{slot_guard} = shift; 440 $state{slot_guard} = shift;
341 441
342 return unless $state{connect_guard}; 442 return unless $state{connect_guard};
343 443
344 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 444 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
345 $state{fh} = shift 445 $state{fh} = shift
446 or do {
447 my $err = "$!";
448 %state = ();
346 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); 449 return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
450 };
451
347 pop; # free memory, save a tree 452 pop; # free memory, save a tree
348 453
349 return unless delete $state{connect_guard}; 454 return unless delete $state{connect_guard};
350 455
351 # get handle 456 # get handle
352 $state{handle} = new AnyEvent::Handle 457 $state{handle} = new AnyEvent::Handle
353 fh => $state{fh}, 458 fh => $state{fh},
354 timeout => $timeout; 459 timeout => $timeout,
460 peername => $rhost,
461 tls_ctx => $arg{tls_ctx};
355 462
356 # limit the number of persistent connections 463 # limit the number of persistent connections
357 # keepalive not yet supported 464 # keepalive not yet supported
358 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 465 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
359 ++$KA_COUNT{$_[1]}; 466 ++$KA_COUNT{$_[1]};
… …
365 delete $hdr{connection}; 472 delete $hdr{connection};
366 } 473 }
367 474
368 # (re-)configure handle 475 # (re-)configure handle
369 $state{handle}->on_error (sub { 476 $state{handle}->on_error (sub {
370 my $errno = "$!";
371 %state = (); 477 %state = ();
372 $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); 478 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
373 }); 479 });
374 $state{handle}->on_eof (sub { 480 $state{handle}->on_eof (sub {
375 %state = (); 481 %state = ();
376 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); 482 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
377 }); 483 });
378 484
379 $state{handle}->starttls ("connect") if $rscheme eq "https"; 485 $state{handle}->starttls ("connect") if $rscheme eq "https";
380 486
381 # handle actual, non-tunneled, request 487 # handle actual, non-tunneled, request
… …
383 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; 489 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
384 490
385 # send request 491 # send request
386 $state{handle}->push_write ( 492 $state{handle}->push_write (
387 "$method $rpath HTTP/1.0\015\012" 493 "$method $rpath HTTP/1.0\015\012"
388 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) 494 . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr)
389 . "\015\012" 495 . "\015\012"
390 . (delete $arg{body}) 496 . (delete $arg{body})
391 ); 497 );
392 498
499 # return if error occured during push_write()
500 return unless %state;
501
393 %hdr = (); # reduce memory usage, save a kitten 502 %hdr = (); # reduce memory usage, save a kitten
394 503
395 # status line 504 # status line
396 $state{handle}->push_read (line => $qr_nl, sub { 505 $state{handle}->push_read (line => $qr_nl, sub {
397 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 506 $_[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 })); 507 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
399 508
400 my %hdr = ( # response headers 509 my %hdr = ( # response headers
401 HTTPVersion => ",$1", 510 HTTPVersion => ",$1",
402 Status => ",$2", 511 Status => ",$2",
403 Reason => ",$3", 512 Reason => ",$3",
404 URL => ",$url" 513 URL => ",$url"
405 ); 514 );
406 515
407 # headers, could be optimized a bit 516 # headers, could be optimized a bit
408 $state{handle}->unshift_read (line => $qr_nlnl, sub { 517 $state{handle}->unshift_read (line => $qr_nlnl, sub {
409 for ("$_[1]\012") { 518 for ("$_[1]") {
410 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 519 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
411 520
412 # we support spaces in field names, as lotus domino 521 # things seen, not parsed:
413 # creates them (actually spaces around seperators 522 # p3pP="NON CUR OTPi OUR NOR UNI"
414 # are strictly allowed in http, they are a security issue). 523
415 $hdr{lc $1} .= ",$2" 524 $hdr{lc $1} .= ",$2"
416 while /\G 525 while /\G
417 ([^:\000-\037]+): 526 ([^:\000-\037]*):
418 [\011\040]* 527 [\011\040]*
419 ((?: [^\012]+ | \012[\011\040] )*) 528 ((?: [^\012]+ | \012[\011\040] )*)
420 \012 529 \012
421 /gxc; 530 /gxc;
422 531
423 /\G$/ 532 /\G$/
424 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url })); 533 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
425 } 534 }
426 535
427 substr $_, 0, 1, "" 536 substr $_, 0, 1, ""
428 for values %hdr; 537 for values %hdr;
429 538
539 # redirect handling
540 # microsoft and other shitheads don't give a shit for following standards,
541 # try to support some common forms of broken Location headers.
542 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
543 $hdr{location} =~ s/^\.\/+//;
544
545 my $url = "$rscheme://$uhost:$uport";
546
547 unless ($hdr{location} =~ s/^\///) {
548 $url .= $upath;
549 $url =~ s/\/[^\/]*$//;
550 }
551
552 $hdr{location} = "$url/$hdr{location}";
553 }
554
555 my $redirect;
556
557 if ($recurse) {
558 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
559 # apparently, mozilla et al. just change POST to GET here
560 # more research is needed before we do the same
561 $redirect = 1;
562 } elsif ($hdr{Status} == 303) {
563 # even http/1.1 is unclear on how to mutate the method
564 $method = "GET" unless $method eq "HEAD";
565 $redirect = 1;
566 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) {
567 $redirect = 1;
568 }
569 }
570
430 my $finish = sub { 571 my $finish = sub {
431 # TODO: use destroy method, when/if available
432 #$state{handle}->destroy; 572 $state{handle}->destroy if $state{handle};
433 $state{handle}->on_eof (undef);
434 $state{handle}->on_error (undef);
435 %state = (); 573 %state = ();
436 574
437 # set-cookie processing 575 # set-cookie processing
438 if ($arg{cookie_jar}) { 576 if ($arg{cookie_jar}) {
439 for ($hdr{"set-cookie"}) { 577 for ($_[1]{"set-cookie"}) {
440 # parse NAME=VALUE 578 # parse NAME=VALUE
441 my @kv; 579 my @kv;
442 580
443 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { 581 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
444 my $name = $1; 582 my $name = $1;
… …
482 620
483 redo if /\G\s*,/gc; 621 redo if /\G\s*,/gc;
484 } 622 }
485 } 623 }
486 624
487 # microsoft and other shitheads don't give a shit for following standards, 625 if ($redirect && exists $hdr{location}) {
488 # try to support some common forms of broken Location headers. 626 # we ignore any errors, as it is very common to receive
489 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 627 # Content-Length != 0 but no actual body
490 $_[1]{location} =~ s/^\.\/+//; 628 # we also access %hdr, as $_[1] might be an erro
491
492 my $url = "$rscheme://$uhost:$uport";
493
494 unless ($_[1]{location} =~ s/^\///) {
495 $url .= $upath;
496 $url =~ s/\/[^\/]*$//;
497 }
498
499 $_[1]{location} = "$url/$_[1]{location}";
500 }
501
502 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
503 # apparently, mozilla et al. just change POST to GET here
504 # more research is needed before we do the same
505 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
506 } elsif ($_[1]{Status} == 303 && $recurse) {
507 # even http/1.1 is unclear on how to mutate the method
508 $method = "GET" unless $method eq "HEAD";
509 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 629 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
510 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
511 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
512 } else { 630 } else {
513 $cb->($_[0], $_[1]); 631 $cb->($_[0], $_[1]);
514 } 632 }
515 }; 633 };
516 634
517 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { 635 my $len = $hdr{"content-length"};
636
637 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
638 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
639 } elsif (
640 $hdr{Status} =~ /^(?:1..|[23]04)$/
641 or $method eq "HEAD"
642 or (defined $len && !$len)
643 ) {
644 # no body
518 $finish->(undef, \%hdr); 645 $finish->("", \%hdr);
519 } else { 646 } else {
520 if (exists $hdr{"content-length"}) { 647 # body handling, four different code paths
521 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 648 # for want_body_handle, on_body (2x), normal (2x)
522 # could cache persistent connection now 649 # we might read too much here, but it does not matter yet (no pers. connections)
523 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 650 if (!$redirect && $arg{want_body_handle}) {
524 # but we don't, due to misdesigns, this is annoyingly complex 651 $_[0]->on_eof (undef);
652 $_[0]->on_error (undef);
653 $_[0]->on_read (undef);
654
655 $finish->(delete $state{handle}, \%hdr);
656
657 } elsif ($arg{on_body}) {
658 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
659 if ($len) {
660 $_[0]->on_eof (undef);
661 $_[0]->on_read (sub {
662 $len -= length $_[0]{rbuf};
663
664 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
665 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
666
667 $len > 0
668 or $finish->("", \%hdr);
525 }; 669 });
526 670 } else {
671 $_[0]->on_eof (sub {
527 $finish->($_[1], \%hdr); 672 $finish->("", \%hdr);
673 });
674 $_[0]->on_read (sub {
675 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
676 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
677 });
528 }); 678 }
529 } else { 679 } else {
530 # too bad, need to read until we get an error or EOF,
531 # no way to detect winged data.
532 $_[0]->on_error (sub {
533 $finish->($_[0]{rbuf}, \%hdr);
534 });
535 $_[0]->on_eof (undef); 680 $_[0]->on_eof (undef);
681
682 if ($len) {
683 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
684 $_[0]->on_read (sub {
685 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
686 if $len <= length $_[0]{rbuf};
687 });
688 } else {
689 $_[0]->on_error (sub {
690 $! == Errno::EPIPE || !$!
691 ? $finish->(delete $_[0]{rbuf}, \%hdr)
692 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
693 });
536 $_[0]->on_read (sub { }); 694 $_[0]->on_read (sub { });
695 }
537 } 696 }
538 } 697 }
539 }); 698 });
540 }); 699 });
541 }; 700 };
… …
546 705
547 # maybe re-use $uauthority with patched port? 706 # maybe re-use $uauthority with patched port?
548 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); 707 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
549 $state{handle}->push_read (line => $qr_nlnl, sub { 708 $state{handle}->push_read (line => $qr_nlnl, sub {
550 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 709 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
551 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid proxy connect response ($_[1])", URL => $url })); 710 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
552 711
553 if ($2 == 200) { 712 if ($2 == 200) {
554 $rpath = $upath; 713 $rpath = $upath;
555 &$handle_actual_request; 714 &$handle_actual_request;
556 } else { 715 } else {
… …
560 }); 719 });
561 } else { 720 } else {
562 &$handle_actual_request; 721 &$handle_actual_request;
563 } 722 }
564 723
565 }, sub { 724 }, $arg{on_prepare} || sub { $timeout };
566 $timeout
567 };
568 }; 725 };
569 726
570 defined wantarray && AnyEvent::Util::guard { %state = () } 727 defined wantarray && AnyEvent::Util::guard { %state = () }
571} 728}
572 729
… …
593=over 4 750=over 4
594 751
595=item AnyEvent::HTTP::set_proxy "proxy-url" 752=item AnyEvent::HTTP::set_proxy "proxy-url"
596 753
597Sets the default proxy server to use. The proxy-url must begin with a 754Sets the default proxy server to use. The proxy-url must begin with a
598string of the form C<http://host:port> (optionally C<https:...>). 755string of the form C<http://host:port> (optionally C<https:...>), croaks
756otherwise.
757
758To clear an already-set proxy, use C<undef>.
599 759
600=item $AnyEvent::HTTP::MAX_RECURSE 760=item $AnyEvent::HTTP::MAX_RECURSE
601 761
602The default value for the C<recurse> request parameter (default: C<10>). 762The default value for the C<recurse> request parameter (default: C<10>).
603 763
604=item $AnyEvent::HTTP::USERAGENT 764=item $AnyEvent::HTTP::USERAGENT
605 765
606The default value for the C<User-Agent> header (the default is 766The default value for the C<User-Agent> header (the default is
607C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 767C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
608 768
609=item $AnyEvent::HTTP::MAX_PERSISTENT 769=item $AnyEvent::HTTP::MAX_PER_HOST
610 770
611The maximum number of persistent connections to keep open (default: 8). 771The maximum number of concurrent connections to the same host (identified
772by the hostname). If the limit is exceeded, then the additional requests
773are queued until previous connections are closed.
612 774
613Not implemented currently. 775The default value for this is C<4>, and it is highly advisable to not
614 776increase it.
615=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
616
617The maximum time to cache a persistent connection, in seconds (default: 2).
618
619Not implemented currently.
620 777
621=item $AnyEvent::HTTP::ACTIVE 778=item $AnyEvent::HTTP::ACTIVE
622 779
623The number of active connections. This is not the number of currently 780The number of active connections. This is not the number of currently
624running requests, but the number of currently open and non-idle TCP 781running requests, but the number of currently open and non-idle TCP
… …
627=back 784=back
628 785
629=cut 786=cut
630 787
631sub set_proxy($) { 788sub set_proxy($) {
789 if (length $_[0]) {
632 $PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix; 790 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
791 or Carp::croak "$_[0]: invalid proxy URL";
792 $PROXY = [$2, $3 || 3128, $1]
793 } else {
794 undef $PROXY;
795 }
633} 796}
634 797
635# initialise proxy from environment 798# initialise proxy from environment
799eval {
636set_proxy $ENV{http_proxy}; 800 set_proxy $ENV{http_proxy};
801};
637 802
638=head1 SEE ALSO 803=head1 SEE ALSO
639 804
640L<AnyEvent>. 805L<AnyEvent>.
641 806
642=head1 AUTHOR 807=head1 AUTHOR
643 808
644 Marc Lehmann <schmorp@schmorp.de> 809 Marc Lehmann <schmorp@schmorp.de>
645 http://home.schmorp.de/ 810 http://home.schmorp.de/
646 811
812With many thanks to Дмитрий Шалашов, who provided countless
813testcases and bugreports.
814
647=cut 815=cut
648 816
6491 8171
650 818

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