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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.29 by root, Wed Oct 22 23:28:11 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) {
377 if ($chost =~ /^\./) {
295 next unless $chost eq substr $uhost, -length $chost; 378 next unless $chost eq substr $uhost, -length $chost;
296 next unless $chost =~ /^\./; 379 } elsif ($chost =~ /\./) {
380 next unless $chost eq $uhost;
381 } else {
382 next;
383 }
297 384
298 while (my ($cpath, $v) = each %$v) { 385 while (my ($cpath, $v) = each %$v) {
299 next unless $cpath eq substr $upath, 0, length $cpath; 386 next unless $cpath eq substr $upath, 0, length $cpath;
300 387
301 while (my ($k, $v) = each %$v) { 388 while (my ($k, $v) = each %$v) {
302 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;
303 push @cookie, "$k=$v->{value}"; 392 push @cookie, "$k=\"$value\"";
304 } 393 }
305 } 394 }
306 } 395 }
307 396
308 $hdr{cookie} = join "; ", @cookie 397 $hdr{cookie} = join "; ", @cookie
309 if @cookie; 398 if @cookie;
310 } 399 }
311 400
312 my ($rhost, $rport, $rpath); # request host, port, path 401 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
313 402
314 if ($proxy) { 403 if ($proxy) {
315 ($rhost, $rport, $scheme) = @$proxy; 404 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
316 $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" && $rscheme eq "https";
317 } else { 409 } else {
318 ($rhost, $rport, $rpath) = ($uhost, $uport, $upath); 410 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
319 $hdr{host} = $uhost;
320 } 411 }
412
413 $hdr{"user-agent"} ||= $USERAGENT;
414 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
321 415
322 $hdr{"content-length"} = length $arg{body}; 416 $hdr{"content-length"} = length $arg{body};
323 417
324 my %state = (connect_guard => 1); 418 my %state = (connect_guard => 1);
325 419
… …
328 422
329 return unless $state{connect_guard}; 423 return unless $state{connect_guard};
330 424
331 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 425 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
332 $state{fh} = shift 426 $state{fh} = shift
427 or do {
428 my $err = "$!";
429 %state = ();
333 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); 430 return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
431 };
334 432
335 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};
336 436
337 # get handle 437 # get handle
338 $state{handle} = new AnyEvent::Handle 438 $state{handle} = new AnyEvent::Handle
339 fh => $state{fh}, 439 fh => $state{fh},
340 ($scheme eq "https" ? (tls => "connect") : ()); 440 timeout => $timeout,
441 peername => $rhost,
442 tls_ctx => $arg{tls_ctx};
341 443
342 # limit the number of persistent connections 444 # limit the number of persistent connections
445 # keepalive not yet supported
343 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 446 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
344 ++$KA_COUNT{$_[1]}; 447 ++$KA_COUNT{$_[1]};
345 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 448 $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
449 --$KA_COUNT{$_[1]}
450 };
346 $hdr{connection} = "keep-alive"; 451 $hdr{connection} = "keep-alive";
347 delete $hdr{connection}; # keep-alive not yet supported
348 } else { 452 } else {
349 delete $hdr{connection}; 453 delete $hdr{connection};
350 } 454 }
351 455
352 # (re-)configure handle 456 # (re-)configure handle
353 $state{handle}->timeout ($timeout);
354 $state{handle}->on_error (sub { 457 $state{handle}->on_error (sub {
355 my $errno = "$!";
356 %state = (); 458 %state = ();
357 $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); 459 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
358 }); 460 });
359 $state{handle}->on_eof (sub { 461 $state{handle}->on_eof (sub {
360 %state = (); 462 %state = ();
361 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); 463 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
362 }); 464 });
363 465
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
364 # send request 472 # send request
365 $state{handle}->push_write ( 473 $state{handle}->push_write (
366 "$method $rpath HTTP/1.0\015\012" 474 "$method $rpath HTTP/1.0\015\012"
367 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) 475 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
368 . "\015\012" 476 . "\015\012"
369 . (delete $arg{body}) 477 . (delete $arg{body})
370 );
371
372 %hdr = (); # reduce memory usage, save a kitten
373
374 # status line
375 $state{handle}->push_read (line => qr/\015?\012/, sub {
376 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
377 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
378
379 my %hdr = ( # response headers
380 HTTPVersion => "\x00$1",
381 Status => "\x00$2",
382 Reason => "\x00$3",
383 URL => "\x00$url"
384 ); 478 );
385 479
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
386 # headers, could be optimized a bit 494 # headers, could be optimized a bit
387 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 495 $state{handle}->unshift_read (line => $qr_nlnl, sub {
388 for ("$_[1]\012") { 496 for ("$_[1]\012") {
389 # 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.
390 # creates them. 498
499 # things seen, not parsed:
500 # p3pP="NON CUR OTPi OUR NOR UNI"
501
391 $hdr{lc $1} .= "\x00$2" 502 $hdr{lc $1} .= ",$2"
392 while /\G 503 while /\G
393 ([^:\000-\037]+): 504 ([^:\000-\037]*):
394 [\011\040]* 505 [\011\040]*
395 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 506 ((?: [^\012]+ | \012[\011\040] )*)
396 \015?\012 507 \012
397 /gxc; 508 /gxc;
398 509
399 /\G$/ 510 /\G$/
400 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 }));
401 }
402
403 substr $_, 0, 1, ""
404 for values %hdr;
405
406 my $finish = sub {
407 %state = ();
408
409 # set-cookie processing
410 if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
411 for (split /\x00/, $hdr{"set-cookie"}) {
412 my ($cookie, @arg) = split /;\s*/;
413 my ($name, $value) = split /=/, $cookie, 2;
414 my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
415
416 my $cdom = (delete $kv{domain}) || $uhost;
417 my $cpath = (delete $kv{path}) || "/";
418
419 $cdom =~ s/^\.?/./; # make sure it starts with a "."
420
421 next if $cdom =~ /\.$/;
422
423 # this is not rfc-like and not netscape-like. go figure.
424 my $ndots = $cdom =~ y/.//;
425 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
426
427 # store it
428 $arg{cookie_jar}{version} = 1;
429 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
430 }
431 } 512 }
432 513
514 substr $_, 0, 1, ""
515 for values %hdr;
516
517 # redirect handling
433 # microsoft and other shitheads don't give a shit for following standards, 518 # microsoft and other shitheads don't give a shit for following standards,
434 # try to support some common forms of broken Location headers. 519 # try to support some common forms of broken Location headers.
435 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 520 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
436 $_[1]{location} =~ s/^\.\/+//; 521 $hdr{location} =~ s/^\.\/+//;
437 522
438 my $url = "$scheme://$uhost:$uport"; 523 my $url = "$rscheme://$uhost:$uport";
439 524
440 unless ($_[1]{location} =~ s/^\///) { 525 unless ($hdr{location} =~ s/^\///) {
441 $url .= $upath; 526 $url .= $upath;
442 $url =~ s/\/[^\/]*$//; 527 $url =~ s/\/[^\/]*$//;
443 } 528 }
444 529
445 $_[1]{location} = "$url/$_[1]{location}"; 530 $hdr{location} = "$url/$hdr{location}";
446 } 531 }
447 532
533 my $redirect;
534
535 if ($recurse) {
448 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") { 536 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
449 # apparently, mozilla et al. just change POST to GET here 537 # apparently, mozilla et al. just change POST to GET here
450 # more research is needed before we do the same 538 # more research is needed before we do the same
451 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 539 $redirect = 1;
452 } elsif ($_[1]{Status} == 303 && $recurse) { 540 } elsif ($hdr{Status} == 303) {
453 # even http/1.1 is unlear on how to mutate the method 541 # even http/1.1 is unclear on how to mutate the method
454 $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 $_[1] might be an erro
455 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 607 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
456 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) { 608 } else {
457 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);
458 } else { 624 } else {
459 $cb->($_[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 $_[0]->on_read (sub { });
673 }
674 }
460 } 675 }
461 }; 676 });
677 });
678 };
462 679
463 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { 680 # now handle proxy-CONNECT method
464 $finish->(undef, \%hdr); 681 if ($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;
465 } else { 693 } else {
466 if (exists $hdr{"content-length"}) { 694 %state = ();
467 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 695 $cb->(undef, { Status => $2, Reason => $3, URL => $url });
468 # could cache persistent connection now
469 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
470 # but we don't, due to misdesigns, this is annoyingly complex
471 };
472
473 $finish->($_[1], \%hdr);
474 });
475 } else {
476 # too bad, need to read until we get an error or EOF,
477 # no way to detect winged data.
478 $_[0]->on_error (sub {
479 $finish->($_[0]{rbuf}, \%hdr);
480 });
481 $_[0]->on_eof (undef);
482 $_[0]->on_read (sub { });
483 }
484 } 696 }
485 }); 697 });
698 } else {
699 &$handle_actual_request;
486 }); 700 }
701
487 }, sub { 702 }, sub {
488 $timeout 703 $timeout
489 }; 704 };
490 }; 705 };
491 706
… …
524The default value for the C<recurse> request parameter (default: C<10>). 739The default value for the C<recurse> request parameter (default: C<10>).
525 740
526=item $AnyEvent::HTTP::USERAGENT 741=item $AnyEvent::HTTP::USERAGENT
527 742
528The default value for the C<User-Agent> header (the default is 743The default value for the C<User-Agent> header (the default is
529C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 744C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
530 745
531=item $AnyEvent::HTTP::MAX_PERSISTENT 746=item $AnyEvent::HTTP::MAX_PER_HOST
532 747
533The 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.
534 751
535Not implemented currently. 752The default value for this is C<4>, and it is highly advisable to not
536 753increase it.
537=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
538
539The maximum time to cache a persistent connection, in seconds (default: 2).
540
541Not implemented currently.
542 754
543=item $AnyEvent::HTTP::ACTIVE 755=item $AnyEvent::HTTP::ACTIVE
544 756
545The number of active connections. This is not the number of currently 757The number of active connections. This is not the number of currently
546running requests, but the number of currently open and non-idle TCP 758running requests, but the number of currently open and non-idle TCP
… …
564=head1 AUTHOR 776=head1 AUTHOR
565 777
566 Marc Lehmann <schmorp@schmorp.de> 778 Marc Lehmann <schmorp@schmorp.de>
567 http://home.schmorp.de/ 779 http://home.schmorp.de/
568 780
781With many thanks to Дмитрий Шалашов, who provided countless
782testcases and bugreports.
783
569=cut 784=cut
570 785
5711 7861
572 787

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