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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.35 by root, Thu Oct 30 03:47:01 2008 UTC vs.
Revision 1.53 by root, Sat Dec 5 15:37:07 2009 UTC

… …
39package AnyEvent::HTTP; 39package AnyEvent::HTTP;
40 40
41use strict; 41use strict;
42no warnings; 42no warnings;
43 43
44use Carp; 44use Errno ();
45 45
46use AnyEvent (); 46use AnyEvent 5.0 ();
47use AnyEvent::Util (); 47use AnyEvent::Util ();
48use AnyEvent::Socket (); 48use AnyEvent::Socket ();
49use AnyEvent::Handle (); 49use AnyEvent::Handle ();
50 50
51use base Exporter::; 51use base Exporter::;
52 52
53our $VERSION = '1.1'; 53our $VERSION = '1.44';
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
393 %hdr = (); # reduce memory usage, save a kitten 499 %hdr = (); # reduce memory usage, save a kitten
394 500
395 # status line 501 # status line
396 $state{handle}->push_read (line => $qr_nl, sub { 502 $state{handle}->push_read (line => $qr_nl, sub {
397 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 503 $_[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 })); 504 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
399 505
400 my %hdr = ( # response headers 506 my %hdr = ( # response headers
401 HTTPVersion => ",$1", 507 HTTPVersion => ",$1",
402 Status => ",$2", 508 Status => ",$2",
403 Reason => ",$3", 509 Reason => ",$3",
404 URL => ",$url" 510 URL => ",$url"
405 ); 511 );
406 512
407 # headers, could be optimized a bit 513 # headers, could be optimized a bit
408 $state{handle}->unshift_read (line => $qr_nlnl, sub { 514 $state{handle}->unshift_read (line => $qr_nlnl, sub {
409 for ("$_[1]\012") { 515 for ("$_[1]") {
410 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 516 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
411 517
412 # we support spaces in field names, as lotus domino 518 # things seen, not parsed:
413 # creates them (actually spaces around seperators 519 # p3pP="NON CUR OTPi OUR NOR UNI"
414 # are strictly allowed in http, they are a security issue). 520
415 $hdr{lc $1} .= ",$2" 521 $hdr{lc $1} .= ",$2"
416 while /\G 522 while /\G
417 ([^:\000-\037]+): 523 ([^:\000-\037]*):
418 [\011\040]* 524 [\011\040]*
419 ((?: [^\012]+ | \012[\011\040] )*) 525 ((?: [^\012]+ | \012[\011\040] )*)
420 \012 526 \012
421 /gxc; 527 /gxc;
422 528
423 /\G$/ 529 /\G$/
424 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url })); 530 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
425 } 531 }
426 532
427 substr $_, 0, 1, "" 533 substr $_, 0, 1, ""
428 for values %hdr; 534 for values %hdr;
429 535
536 # redirect handling
537 # microsoft and other shitheads don't give a shit for following standards,
538 # try to support some common forms of broken Location headers.
539 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
540 $hdr{location} =~ s/^\.\/+//;
541
542 my $url = "$rscheme://$uhost:$uport";
543
544 unless ($hdr{location} =~ s/^\///) {
545 $url .= $upath;
546 $url =~ s/\/[^\/]*$//;
547 }
548
549 $hdr{location} = "$url/$hdr{location}";
550 }
551
552 my $redirect;
553
554 if ($recurse) {
555 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
556 # apparently, mozilla et al. just change POST to GET here
557 # more research is needed before we do the same
558 $redirect = 1;
559 } elsif ($hdr{Status} == 303) {
560 # even http/1.1 is unclear on how to mutate the method
561 $method = "GET" unless $method eq "HEAD";
562 $redirect = 1;
563 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) {
564 $redirect = 1;
565 }
566 }
567
430 my $finish = sub { 568 my $finish = sub {
431 $state{handle}->destroy; 569 $state{handle}->destroy if $state{handle};
432 %state = (); 570 %state = ();
433 571
434 # set-cookie processing 572 # set-cookie processing
435 if ($arg{cookie_jar}) { 573 if ($arg{cookie_jar}) {
436 for ($hdr{"set-cookie"}) { 574 for ($_[1]{"set-cookie"}) {
437 # parse NAME=VALUE 575 # parse NAME=VALUE
438 my @kv; 576 my @kv;
439 577
440 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { 578 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
441 my $name = $1; 579 my $name = $1;
… …
479 617
480 redo if /\G\s*,/gc; 618 redo if /\G\s*,/gc;
481 } 619 }
482 } 620 }
483 621
484 # microsoft and other shitheads don't give a shit for following standards, 622 if ($redirect && exists $hdr{location}) {
485 # try to support some common forms of broken Location headers. 623 # we ignore any errors, as it is very common to receive
486 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 624 # Content-Length != 0 but no actual body
487 $_[1]{location} =~ s/^\.\/+//; 625 # we also access %hdr, as $_[1] might be an erro
488
489 my $url = "$rscheme://$uhost:$uport";
490
491 unless ($_[1]{location} =~ s/^\///) {
492 $url .= $upath;
493 $url =~ s/\/[^\/]*$//;
494 }
495
496 $_[1]{location} = "$url/$_[1]{location}";
497 }
498
499 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
500 # apparently, mozilla et al. just change POST to GET here
501 # more research is needed before we do the same
502 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
503 } elsif ($_[1]{Status} == 303 && $recurse) {
504 # even http/1.1 is unclear on how to mutate the method
505 $method = "GET" unless $method eq "HEAD";
506 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 626 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
507 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
508 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
509 } else { 627 } else {
510 $cb->($_[0], $_[1]); 628 $cb->($_[0], $_[1]);
511 } 629 }
512 }; 630 };
513 631
514 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { 632 my $len = $hdr{"content-length"};
633
634 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
635 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
636 } elsif (
637 $hdr{Status} =~ /^(?:1..|[23]04)$/
638 or $method eq "HEAD"
639 or (defined $len && !$len)
640 ) {
641 # no body
515 $finish->(undef, \%hdr); 642 $finish->("", \%hdr);
516 } else { 643 } else {
517 if (exists $hdr{"content-length"}) { 644 # body handling, four different code paths
518 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 645 # for want_body_handle, on_body (2x), normal (2x)
519 # could cache persistent connection now 646 # we might read too much here, but it does not matter yet (no pers. connections)
520 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 647 if (!$redirect && $arg{want_body_handle}) {
521 # but we don't, due to misdesigns, this is annoyingly complex 648 $_[0]->on_eof (undef);
649 $_[0]->on_error (undef);
650 $_[0]->on_read (undef);
651
652 $finish->(delete $state{handle}, \%hdr);
653
654 } elsif ($arg{on_body}) {
655 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
656 if ($len) {
657 $_[0]->on_eof (undef);
658 $_[0]->on_read (sub {
659 $len -= length $_[0]{rbuf};
660
661 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
662 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
663
664 $len > 0
665 or $finish->("", \%hdr);
522 }; 666 });
523 667 } else {
668 $_[0]->on_eof (sub {
524 $finish->($_[1], \%hdr); 669 $finish->("", \%hdr);
670 });
671 $_[0]->on_read (sub {
672 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
673 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
674 });
525 }); 675 }
526 } else { 676 } else {
527 # too bad, need to read until we get an error or EOF,
528 # no way to detect winged data.
529 $_[0]->on_error (sub {
530 $finish->($_[0]{rbuf}, \%hdr);
531 });
532 $_[0]->on_eof (undef); 677 $_[0]->on_eof (undef);
678
679 if ($len) {
680 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
681 $_[0]->on_read (sub {
682 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
683 if $len <= length $_[0]{rbuf};
684 });
685 } else {
686 $_[0]->on_error (sub {
687 $! == Errno::EPIPE || !$!
688 ? $finish->(delete $_[0]{rbuf}, \%hdr)
689 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
690 });
533 $_[0]->on_read (sub { }); 691 $_[0]->on_read (sub { });
692 }
534 } 693 }
535 } 694 }
536 }); 695 });
537 }); 696 });
538 }; 697 };
… …
543 702
544 # maybe re-use $uauthority with patched port? 703 # maybe re-use $uauthority with patched port?
545 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); 704 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
546 $state{handle}->push_read (line => $qr_nlnl, sub { 705 $state{handle}->push_read (line => $qr_nlnl, sub {
547 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 706 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
548 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid proxy connect response ($_[1])", URL => $url })); 707 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
549 708
550 if ($2 == 200) { 709 if ($2 == 200) {
551 $rpath = $upath; 710 $rpath = $upath;
552 &$handle_actual_request; 711 &$handle_actual_request;
553 } else { 712 } else {
… …
557 }); 716 });
558 } else { 717 } else {
559 &$handle_actual_request; 718 &$handle_actual_request;
560 } 719 }
561 720
562 }, sub { 721 }, $arg{on_prepare} || sub { $timeout };
563 $timeout
564 };
565 }; 722 };
566 723
567 defined wantarray && AnyEvent::Util::guard { %state = () } 724 defined wantarray && AnyEvent::Util::guard { %state = () }
568} 725}
569 726
… …
590=over 4 747=over 4
591 748
592=item AnyEvent::HTTP::set_proxy "proxy-url" 749=item AnyEvent::HTTP::set_proxy "proxy-url"
593 750
594Sets the default proxy server to use. The proxy-url must begin with a 751Sets the default proxy server to use. The proxy-url must begin with a
595string of the form C<http://host:port> (optionally C<https:...>). 752string of the form C<http://host:port> (optionally C<https:...>), croaks
753otherwise.
754
755To clear an already-set proxy, use C<undef>.
596 756
597=item $AnyEvent::HTTP::MAX_RECURSE 757=item $AnyEvent::HTTP::MAX_RECURSE
598 758
599The default value for the C<recurse> request parameter (default: C<10>). 759The default value for the C<recurse> request parameter (default: C<10>).
600 760
601=item $AnyEvent::HTTP::USERAGENT 761=item $AnyEvent::HTTP::USERAGENT
602 762
603The default value for the C<User-Agent> header (the default is 763The default value for the C<User-Agent> header (the default is
604C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 764C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
605 765
606=item $AnyEvent::HTTP::MAX_PERSISTENT 766=item $AnyEvent::HTTP::MAX_PER_HOST
607 767
608The maximum number of persistent connections to keep open (default: 8). 768The maximum number of concurrent connections to the same host (identified
769by the hostname). If the limit is exceeded, then the additional requests
770are queued until previous connections are closed.
609 771
610Not implemented currently. 772The default value for this is C<4>, and it is highly advisable to not
611 773increase it.
612=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
613
614The maximum time to cache a persistent connection, in seconds (default: 2).
615
616Not implemented currently.
617 774
618=item $AnyEvent::HTTP::ACTIVE 775=item $AnyEvent::HTTP::ACTIVE
619 776
620The number of active connections. This is not the number of currently 777The number of active connections. This is not the number of currently
621running requests, but the number of currently open and non-idle TCP 778running requests, but the number of currently open and non-idle TCP
… …
624=back 781=back
625 782
626=cut 783=cut
627 784
628sub set_proxy($) { 785sub set_proxy($) {
786 if (length $_[0]) {
629 $PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix; 787 $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix
788 or Carp::croak "$_[0]: invalid proxy URL";
789 $PROXY = [$2, $3 || 3128, $1]
790 } else {
791 undef $PROXY;
792 }
630} 793}
631 794
632# initialise proxy from environment 795# initialise proxy from environment
796eval {
633set_proxy $ENV{http_proxy}; 797 set_proxy $ENV{http_proxy};
798};
634 799
635=head1 SEE ALSO 800=head1 SEE ALSO
636 801
637L<AnyEvent>. 802L<AnyEvent>.
638 803
639=head1 AUTHOR 804=head1 AUTHOR
640 805
641 Marc Lehmann <schmorp@schmorp.de> 806 Marc Lehmann <schmorp@schmorp.de>
642 http://home.schmorp.de/ 807 http://home.schmorp.de/
643 808
809With many thanks to Дмитрий Шалашов, who provided countless
810testcases and bugreports.
811
644=cut 812=cut
645 813
6461 8141
647 815

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