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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.30 by root, Thu Oct 23 02:46:20 2008 UTC vs.
Revision 1.45 by root, Fri Jul 17 16:56:36 2009 UTC

… …
39package AnyEvent::HTTP; 39package AnyEvent::HTTP;
40 40
41use strict; 41use strict;
42no warnings; 42no warnings;
43 43
44use Carp; 44use Errno ();
45 45
46use AnyEvent (); 46use AnyEvent 4.8 ();
47use AnyEvent::Util (); 47use AnyEvent::Util ();
48use AnyEvent::Socket (); 48use AnyEvent::Socket ();
49use AnyEvent::Handle (); 49use AnyEvent::Handle ();
50 50
51use base Exporter::; 51use base Exporter::;
52 52
53our $VERSION = '1.05'; 53our $VERSION = '1.4';
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 C<\x00>. 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, $hdr) = @_;
… …
165based on the original netscape specification. 166based on the original netscape specification.
166 167
167The C<$hash_ref> must be an (initially empty) hash reference which will 168The C<$hash_ref> must be an (initially empty) hash reference which will
168get updated automatically. It is possible to save the cookie_jar to 169get updated automatically. It is possible to save the cookie_jar to
169persistent storage with something like JSON or Storable, but this is not 170persistent storage with something like JSON or Storable, but this is not
170recommended, as expire times are currently being ignored. 171recommended, as expiry times are currently being ignored.
171 172
172Note that this cookie implementation is not of very high quality, nor 173Note that this cookie implementation is not of very high quality, nor
173meant to be complete. If you want complete cookie management you have to 174meant 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 175do 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 176cookie-using sites working. Cookies are a privacy disaster, do not use
176them unless required to. 177them unless required to.
178
179=item tls_ctx => $scheme | $tls_ctx
180
181Specifies the AnyEvent::TLS context to be used for https connections. This
182parameter follows the same rules as the C<tls_ctx> parameter to
183L<AnyEvent::Handle>, but additionally, the two strings C<low> or
184C<high> can be specified, which give you a predefined low-security (no
185verification, highest compatibility) and high-security (CA and common-name
186verification) TLS context.
187
188The default for this option is C<low>, which could be interpreted as "give
189me the page, no matter what".
190
191=item on_header => $callback->($headers)
192
193When specified, this callback will be called with the header hash as soon
194as headers have been successfully received from the remote server (not on
195locally-generated errors).
196
197It has to return either true (in which case AnyEvent::HTTP will continue),
198or false, in which case AnyEvent::HTTP will cancel the download (and call
199the finish callback with an error code of C<598>).
200
201This callback is useful, among other things, to quickly reject unwanted
202content, which, if it is supposed to be rare, can be faster than first
203doing a C<HEAD> request.
204
205Example: cancel the request unless the content-type is "text/html".
206
207 on_header => sub {
208 $_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/
209 },
210
211=item on_body => $callback->($partial_body, $headers)
212
213When specified, all body data will be passed to this callback instead of
214to the completion callback. The completion callback will get the empty
215string instead of the body data.
216
217It has to return either true (in which case AnyEvent::HTTP will continue),
218or false, in which case AnyEvent::HTTP will cancel the download (and call
219the completion callback with an error code of C<598>).
220
221This callback is useful when the data is too large to be held in memory
222(so the callback writes it to a file) or when only some information should
223be extracted, or when the body should be processed incrementally.
224
225It is usually preferred over doing your own body handling via
226C<want_body_handle>, but in case of streaming APIs, where HTTP is
227only used to create a connection, C<want_body_handle> is the better
228alternative, as it allows you to install your own event handler, reducing
229resource usage.
230
231=item want_body_handle => $enable
232
233When enabled (default is disabled), the behaviour of AnyEvent::HTTP
234changes considerably: after parsing the headers, and instead of
235downloading the body (if any), the completion callback will be
236called. Instead of the C<$body> argument containing the body data, the
237callback will receive the L<AnyEvent::Handle> object associated with the
238connection. In error cases, C<undef> will be passed. When there is no body
239(e.g. status C<304>), the empty string will be passed.
240
241The handle object might or might not be in TLS mode, might be connected to
242a proxy, be a persistent connection etc., and configured in unspecified
243ways. The user is responsible for this handle (it will not be used by this
244module anymore).
245
246This is useful with some push-type services, where, after the initial
247headers, an interactive protocol is used (typical example would be the
248push-style twitter API which starts a JSON/XML stream).
249
250If you think you need this, first have a look at C<on_body>, to see if
251that doesn't solve your problem in a better way.
177 252
178=back 253=back
179 254
180Example: make a simple HTTP GET request for http://www.nethype.de/ 255Example: make a simple HTTP GET request for http://www.nethype.de/
181 256
… …
237 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 312 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
238 313
239 _slot_schedule $_[0]; 314 _slot_schedule $_[0];
240} 315}
241 316
317our $qr_nl = qr<\015?\012>;
318our $qr_nlnl = qr<\015?\012\015?\012>;
319
320our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
321our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
322
242sub http_request($$@) { 323sub http_request($$@) {
243 my $cb = pop; 324 my $cb = pop;
244 my ($method, $url, %arg) = @_; 325 my ($method, $url, %arg) = @_;
245 326
246 my %hdr; 327 my %hdr;
328
329 $arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx};
330 $arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
247 331
248 $method = uc $method; 332 $method = uc $method;
249 333
250 if (my $hdr = $arg{headers}) { 334 if (my $hdr = $arg{headers}) {
251 while (my ($k, $v) = each %$hdr) { 335 while (my ($k, $v) = each %$hdr) {
… …
253 } 337 }
254 } 338 }
255 339
256 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 340 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
257 341
258 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url }) 342 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
259 if $recurse < 0; 343 if $recurse < 0;
260 344
261 my $proxy = $arg{proxy} || $PROXY; 345 my $proxy = $arg{proxy} || $PROXY;
262 my $timeout = $arg{timeout} || $TIMEOUT; 346 my $timeout = $arg{timeout} || $TIMEOUT;
263 347
264 $hdr{"user-agent"} ||= $USERAGENT;
265
266 my ($scheme, $authority, $upath, $query, $fragment) = 348 my ($uscheme, $uauthority, $upath, $query, $fragment) =
267 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 349 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
268 350
269 $scheme = lc $scheme; 351 $uscheme = lc $uscheme;
270 352
271 my $uport = $scheme eq "http" ? 80 353 my $uport = $uscheme eq "http" ? 80
272 : $scheme eq "https" ? 443 354 : $uscheme eq "https" ? 443
273 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url }); 355 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });
274 356
275 $hdr{referer} ||= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic
276
277 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 357 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
278 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url }); 358 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
279 359
280 my $uhost = $1; 360 my $uhost = $1;
281 $uport = $2 if defined $2; 361 $uport = $2 if defined $2;
282 362
363 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";
364
283 $uhost =~ s/^\[(.*)\]$/$1/; 365 $uhost =~ s/^\[(.*)\]$/$1/;
284 $upath .= "?$query" if length $query; 366 $upath .= "?$query" if length $query;
285 367
286 $upath =~ s%^/?%/%; 368 $upath =~ s%^/?%/%;
287 369
288 # cookie processing 370 # cookie processing
289 if (my $jar = $arg{cookie_jar}) { 371 if (my $jar = $arg{cookie_jar}) {
290 %$jar = () if $jar->{version} < 1; 372 %$jar = () if $jar->{version} != 1;
291 373
292 my @cookie; 374 my @cookie;
293 375
294 while (my ($chost, $v) = each %$jar) { 376 while (my ($chost, $v) = each %$jar) {
295 if ($chost =~ /^\./) { 377 if ($chost =~ /^\./) {
… …
302 384
303 while (my ($cpath, $v) = each %$v) { 385 while (my ($cpath, $v) = each %$v) {
304 next unless $cpath eq substr $upath, 0, length $cpath; 386 next unless $cpath eq substr $upath, 0, length $cpath;
305 387
306 while (my ($k, $v) = each %$v) { 388 while (my ($k, $v) = each %$v) {
307 next if $scheme ne "https" && exists $v->{secure}; 389 next if $uscheme ne "https" && exists $v->{secure};
390 my $value = $v->{value};
391 $value =~ s/([\\"])/\\$1/g;
308 push @cookie, "$k=$v->{value}"; 392 push @cookie, "$k=\"$value\"";
309 } 393 }
310 } 394 }
311 } 395 }
312 396
313 $hdr{cookie} = join "; ", @cookie 397 $hdr{cookie} = join "; ", @cookie
314 if @cookie; 398 if @cookie;
315 } 399 }
316 400
317 my ($rhost, $rport, $rpath); # request host, port, path 401 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
318 402
319 if ($proxy) { 403 if ($proxy) {
320 ($rhost, $rport, $scheme) = @$proxy; 404 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
321 $rpath = $url; 405
406 # don't support https requests over https-proxy transport,
407 # can't be done with tls as spec'ed, unless you double-encrypt.
408 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
322 } else { 409 } else {
323 ($rhost, $rport, $rpath) = ($uhost, $uport, $upath); 410 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
324 $hdr{host} = $uhost;
325 } 411 }
412
413 $hdr{"user-agent"} ||= $USERAGENT;
414 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
326 415
327 $hdr{"content-length"} = length $arg{body}; 416 $hdr{"content-length"} = length $arg{body};
328 417
329 my %state = (connect_guard => 1); 418 my %state = (connect_guard => 1);
330 419
… …
333 422
334 return unless $state{connect_guard}; 423 return unless $state{connect_guard};
335 424
336 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 425 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
337 $state{fh} = shift 426 $state{fh} = shift
427 or do {
428 my $err = "$!";
429 %state = ();
338 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); 430 return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
431 };
339 432
340 delete $state{connect_guard}; # reduce memory usage, save a tree 433 pop; # free memory, save a tree
434
435 return unless delete $state{connect_guard};
341 436
342 # get handle 437 # get handle
343 $state{handle} = new AnyEvent::Handle 438 $state{handle} = new AnyEvent::Handle
344 fh => $state{fh}, 439 fh => $state{fh},
345 ($scheme eq "https" ? (tls => "connect") : ()); 440 timeout => $timeout,
441 peername => $rhost,
442 tls_ctx => $arg{tls_ctx};
346 443
347 # limit the number of persistent connections 444 # limit the number of persistent connections
445 # keepalive not yet supported
348 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 446 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
349 ++$KA_COUNT{$_[1]}; 447 ++$KA_COUNT{$_[1]};
350 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 448 $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
449 --$KA_COUNT{$_[1]}
450 };
351 $hdr{connection} = "keep-alive"; 451 $hdr{connection} = "keep-alive";
352 delete $hdr{connection}; # keep-alive not yet supported
353 } else { 452 } else {
354 delete $hdr{connection}; 453 delete $hdr{connection};
355 } 454 }
356 455
357 # (re-)configure handle 456 # (re-)configure handle
358 $state{handle}->timeout ($timeout);
359 $state{handle}->on_error (sub { 457 $state{handle}->on_error (sub {
360 my $errno = "$!";
361 %state = (); 458 %state = ();
362 $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); 459 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
363 }); 460 });
364 $state{handle}->on_eof (sub { 461 $state{handle}->on_eof (sub {
365 %state = (); 462 %state = ();
366 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); 463 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
367 }); 464 });
368 465
466 $state{handle}->starttls ("connect") if $rscheme eq "https";
467
468 # handle actual, non-tunneled, request
469 my $handle_actual_request = sub {
470 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
471
369 # send request 472 # send request
370 $state{handle}->push_write ( 473 $state{handle}->push_write (
371 "$method $rpath HTTP/1.0\015\012" 474 "$method $rpath HTTP/1.0\015\012"
372 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) 475 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
373 . "\015\012" 476 . "\015\012"
374 . (delete $arg{body}) 477 . (delete $arg{body})
375 );
376
377 %hdr = (); # reduce memory usage, save a kitten
378
379 # status line
380 $state{handle}->push_read (line => qr/\015?\012/, sub {
381 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
382 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
383
384 my %hdr = ( # response headers
385 HTTPVersion => "\x00$1",
386 Status => "\x00$2",
387 Reason => "\x00$3",
388 URL => "\x00$url"
389 ); 478 );
390 479
480 %hdr = (); # reduce memory usage, save a kitten
481
482 # status line
483 $state{handle}->push_read (line => $qr_nl, sub {
484 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
485 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
486
487 my %hdr = ( # response headers
488 HTTPVersion => ",$1",
489 Status => ",$2",
490 Reason => ",$3",
491 URL => ",$url"
492 );
493
391 # headers, could be optimized a bit 494 # headers, could be optimized a bit
392 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 495 $state{handle}->unshift_read (line => $qr_nlnl, sub {
393 for ("$_[1]\012") { 496 for ("$_[1]\012") {
394 # we support spaces in field names, as lotus domino 497 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
395 # creates them (actually spaces around seperators 498
396 # are strictly allowed in http, they are a security issue). 499 # things seen, not parsed:
500 # p3pP="NON CUR OTPi OUR NOR UNI"
501
397 $hdr{lc $1} .= "\x00$2" 502 $hdr{lc $1} .= ",$2"
398 while /\G 503 while /\G
399 ([^:\000-\037]+): 504 ([^:\000-\037]*):
400 [\011\040]* 505 [\011\040]*
401 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 506 ((?: [^\012]+ | \012[\011\040] )*)
402 \015?\012 507 \012
403 /gxc; 508 /gxc;
404 509
405 /\G$/ 510 /\G$/
406 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url })); 511 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
407 }
408
409 substr $_, 0, 1, ""
410 for values %hdr;
411
412 my $finish = sub {
413 # TODO: use destroy method, when/if available
414 #$state{handle}->destroy;
415 $state{handle}->on_eof (undef);
416 $state{handle}->on_error (undef);
417 %state = ();
418
419 # set-cookie processing
420 if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
421 for (split /\x00/, $hdr{"set-cookie"}) {
422 my ($cookie, @arg) = split /;\s*/;
423 my ($name, $value) = split /=/, $cookie, 2;
424 my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
425
426 my $cdom;
427 my $cpath = (delete $kv{path}) || "/";
428
429 if (exists $kv{domain}) {
430 $cdom = delete $kv{domain};
431
432 $cdom =~ s/^\.?/./; # make sure it starts with a "."
433
434 next if $cdom =~ /\.$/;
435
436 # this is not rfc-like and not netscape-like. go figure.
437 my $ndots = $cdom =~ y/.//;
438 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
439 } else {
440 $cdom = $uhost;
441 }
442
443 # store it
444 $arg{cookie_jar}{version} = 1;
445 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
446 }
447 } 512 }
448 513
514 substr $_, 0, 1, ""
515 for values %hdr;
516
517 # redirect handling
449 # microsoft and other shitheads don't give a shit for following standards, 518 # microsoft and other shitheads don't give a shit for following standards,
450 # try to support some common forms of broken Location headers. 519 # try to support some common forms of broken Location headers.
451 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 520 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
452 $_[1]{location} =~ s/^\.\/+//; 521 $hdr{location} =~ s/^\.\/+//;
453 522
454 my $url = "$scheme://$uhost:$uport"; 523 my $url = "$rscheme://$uhost:$uport";
455 524
456 unless ($_[1]{location} =~ s/^\///) { 525 unless ($hdr{location} =~ s/^\///) {
457 $url .= $upath; 526 $url .= $upath;
458 $url =~ s/\/[^\/]*$//; 527 $url =~ s/\/[^\/]*$//;
459 } 528 }
460 529
461 $_[1]{location} = "$url/$_[1]{location}"; 530 $hdr{location} = "$url/$hdr{location}";
462 } 531 }
463 532
533 my $redirect;
534
535 if ($recurse) {
464 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") { 536 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
465 # apparently, mozilla et al. just change POST to GET here 537 # apparently, mozilla et al. just change POST to GET here
466 # more research is needed before we do the same 538 # more research is needed before we do the same
467 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 539 $redirect = 1;
468 } elsif ($_[1]{Status} == 303 && $recurse) { 540 } elsif ($hdr{Status} == 303) {
469 # even http/1.1 is unclear on how to mutate the method 541 # even http/1.1 is unclear on how to mutate the method
470 $method = "GET" unless $method eq "HEAD"; 542 $method = "GET" unless $method eq "HEAD";
543 $redirect = 1;
544 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) {
545 $redirect = 1;
546 }
547 }
548
549 my $finish = sub {
550 $state{handle}->destroy if $state{handle};
551 %state = ();
552
553 # set-cookie processing
554 if ($arg{cookie_jar}) {
555 for ($_[1]{"set-cookie"}) {
556 # parse NAME=VALUE
557 my @kv;
558
559 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
560 my $name = $1;
561 my $value = $3;
562
563 unless ($value) {
564 $value = $2;
565 $value =~ s/\\(.)/$1/gs;
566 }
567
568 push @kv, $name => $value;
569
570 last unless /\G\s*;/gc;
571 }
572
573 last unless @kv;
574
575 my $name = shift @kv;
576 my %kv = (value => shift @kv, @kv);
577
578 my $cdom;
579 my $cpath = (delete $kv{path}) || "/";
580
581 if (exists $kv{domain}) {
582 $cdom = delete $kv{domain};
583
584 $cdom =~ s/^\.?/./; # make sure it starts with a "."
585
586 next if $cdom =~ /\.$/;
587
588 # this is not rfc-like and not netscape-like. go figure.
589 my $ndots = $cdom =~ y/.//;
590 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
591 } else {
592 $cdom = $uhost;
593 }
594
595 # store it
596 $arg{cookie_jar}{version} = 1;
597 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
598
599 redo if /\G\s*,/gc;
600 }
601 }
602
603 if ($redirect) {
604 # we ignore any errors, as it is very common to receive
605 # Content-Length != 0 but no actual body
606 # we also access %hdr, as $_[1] might be an erro
471 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 607 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
472 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) { 608 } else {
473 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 609 $cb->($_[0], $_[1]);
610 }
611 };
612
613 my $len = $hdr{"content-length"};
614
615 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
616 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
617 } elsif (
618 $hdr{Status} =~ /^(?:1..|[23]04)$/
619 or $method eq "HEAD"
620 or (defined $len && !$len)
621 ) {
622 # no body
623 $finish->("", \%hdr);
474 } else { 624 } else {
475 $cb->($_[0], $_[1]); 625 # body handling, four different code paths
626 # for want_body_handle, on_body (2x), normal (2x)
627 # we might read too much here, but it does not matter yet (no pers. connections)
628 if (!$redirect && $arg{want_body_handle}) {
629 $_[0]->on_eof (undef);
630 $_[0]->on_error (undef);
631 $_[0]->on_read (undef);
632
633 $finish->(delete $state{handle}, \%hdr);
634
635 } elsif ($arg{on_body}) {
636 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
637 if ($len) {
638 $_[0]->on_eof (undef);
639 $_[0]->on_read (sub {
640 $len -= length $_[0]{rbuf};
641
642 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
643 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
644
645 $len > 0
646 or $finish->("", \%hdr);
647 });
648 } else {
649 $_[0]->on_eof (sub {
650 $finish->("", \%hdr);
651 });
652 $_[0]->on_read (sub {
653 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
654 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
655 });
656 }
657 } else {
658 $_[0]->on_eof (undef);
659
660 if ($len) {
661 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
662 $_[0]->on_read (sub {
663 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
664 if $len <= length $_[0]{rbuf};
665 });
666 } else {
667 $_[0]->on_error (sub {
668 $! == Errno::EPIPE || !$!
669 ? $finish->(delete $_[0]{rbuf}, \%hdr)
670 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
671 });
672 $_[0]->on_read (sub { });
673 }
674 }
476 } 675 }
477 }; 676 });
677 });
678 };
478 679
479 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { 680 # now handle proxy-CONNECT method
480 $finish->(undef, \%hdr); 681 if ($proxy && $uscheme eq "https") {
682 # oh dear, we have to wrap it into a connect request
683
684 # maybe re-use $uauthority with patched port?
685 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
686 $state{handle}->push_read (line => $qr_nlnl, sub {
687 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
688 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
689
690 if ($2 == 200) {
691 $rpath = $upath;
692 &$handle_actual_request;
481 } else { 693 } else {
482 if (exists $hdr{"content-length"}) { 694 %state = ();
483 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 695 $cb->(undef, { Status => $2, Reason => $3, URL => $url });
484 # could cache persistent connection now
485 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
486 # but we don't, due to misdesigns, this is annoyingly complex
487 };
488
489 $finish->($_[1], \%hdr);
490 });
491 } else {
492 # too bad, need to read until we get an error or EOF,
493 # no way to detect winged data.
494 $_[0]->on_error (sub {
495 $finish->($_[0]{rbuf}, \%hdr);
496 });
497 $_[0]->on_eof (undef);
498 $_[0]->on_read (sub { });
499 }
500 } 696 }
501 }); 697 });
698 } else {
699 &$handle_actual_request;
502 }); 700 }
701
503 }, sub { 702 }, sub {
504 $timeout 703 $timeout
505 }; 704 };
506 }; 705 };
507 706
… …
540The default value for the C<recurse> request parameter (default: C<10>). 739The default value for the C<recurse> request parameter (default: C<10>).
541 740
542=item $AnyEvent::HTTP::USERAGENT 741=item $AnyEvent::HTTP::USERAGENT
543 742
544The default value for the C<User-Agent> header (the default is 743The default value for the C<User-Agent> header (the default is
545C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 744C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
546 745
547=item $AnyEvent::HTTP::MAX_PERSISTENT 746=item $AnyEvent::HTTP::MAX_PER_HOST
548 747
549The maximum number of persistent connections to keep open (default: 8). 748The maximum number of concurrent conenctions to the same host (identified
749by the hostname). If the limit is exceeded, then the additional requests
750are queued until previous connections are closed.
550 751
551Not implemented currently. 752The default value for this is C<4>, and it is highly advisable to not
552 753increase it.
553=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
554
555The maximum time to cache a persistent connection, in seconds (default: 2).
556
557Not implemented currently.
558 754
559=item $AnyEvent::HTTP::ACTIVE 755=item $AnyEvent::HTTP::ACTIVE
560 756
561The number of active connections. This is not the number of currently 757The number of active connections. This is not the number of currently
562running requests, but the number of currently open and non-idle TCP 758running requests, but the number of currently open and non-idle TCP
… …
580=head1 AUTHOR 776=head1 AUTHOR
581 777
582 Marc Lehmann <schmorp@schmorp.de> 778 Marc Lehmann <schmorp@schmorp.de>
583 http://home.schmorp.de/ 779 http://home.schmorp.de/
584 780
781With many thanks to Дмитрий Шалашов, who provided countless
782testcases and bugreports.
783
585=cut 784=cut
586 785
5871 7861
588 787

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