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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.32 by root, Fri Oct 24 01:27:29 2008 UTC vs.
Revision 1.44 by root, Tue Jul 7 00:15:32 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
… …
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, $hdr) = @_;
… …
165based on the original netscape specification. 166based on the original netscape specification.
166 167
167The C<$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>.
227
228=item want_body_handle => $enable
229
230When enabled (default is disabled), the behaviour of AnyEvent::HTTP
231changes considerably: after parsing the headers, and instead of
232downloading the body (if any), the completion callback will be
233called. Instead of the C<$body> argument containing the body data, the
234callback will receive the L<AnyEvent::Handle> object associated with the
235connection. In error cases, C<undef> will be passed. When there is no body
236(e.g. status C<304>), the empty string will be passed.
237
238The handle object might or might not be in TLS mode, might be connected to
239a proxy, be a persistent connection etc., and configured in unspecified
240ways. The user is responsible for this handle (it will not be used by this
241module anymore).
242
243This is useful with some push-type services, where, after the initial
244headers, an interactive protocol is used (typical example would be the
245push-style twitter API which starts a JSON/XML stream).
246
247If you think you need this, first have a look at C<on_body>, to see if
248that doesn'T solve your problem in a better way.
177 249
178=back 250=back
179 251
180Example: make a simple HTTP GET request for http://www.nethype.de/ 252Example: make a simple HTTP GET request for http://www.nethype.de/
181 253
… …
237 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 309 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
238 310
239 _slot_schedule $_[0]; 311 _slot_schedule $_[0];
240} 312}
241 313
314our $qr_nl = qr<\015?\012>;
315our $qr_nlnl = qr<\015?\012\015?\012>;
316
317our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
318our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
319
242sub http_request($$@) { 320sub http_request($$@) {
243 my $cb = pop; 321 my $cb = pop;
244 my ($method, $url, %arg) = @_; 322 my ($method, $url, %arg) = @_;
245 323
246 my %hdr; 324 my %hdr;
325
326 $arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx};
327 $arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
247 328
248 $method = uc $method; 329 $method = uc $method;
249 330
250 if (my $hdr = $arg{headers}) { 331 if (my $hdr = $arg{headers}) {
251 while (my ($k, $v) = each %$hdr) { 332 while (my ($k, $v) = each %$hdr) {
… …
253 } 334 }
254 } 335 }
255 336
256 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 337 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
257 338
258 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url }) 339 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
259 if $recurse < 0; 340 if $recurse < 0;
260 341
261 my $proxy = $arg{proxy} || $PROXY; 342 my $proxy = $arg{proxy} || $PROXY;
262 my $timeout = $arg{timeout} || $TIMEOUT; 343 my $timeout = $arg{timeout} || $TIMEOUT;
263 344
264 $hdr{"user-agent"} ||= $USERAGENT;
265
266 my ($uscheme, $uauthority, $upath, $query, $fragment) = 345 my ($uscheme, $uauthority, $upath, $query, $fragment) =
267 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 346 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
268 347
269 $uscheme = lc $uscheme; 348 $uscheme = lc $uscheme;
270 349
271 my $uport = $uscheme eq "http" ? 80 350 my $uport = $uscheme eq "http" ? 80
272 : $uscheme eq "https" ? 443 351 : $uscheme eq "https" ? 443
273 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url }); 352 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });
274
275 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
276 353
277 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 354 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
278 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url }); 355 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
279 356
280 my $uhost = $1; 357 my $uhost = $1;
281 $uport = $2 if defined $2; 358 $uport = $2 if defined $2;
359
360 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";
282 361
283 $uhost =~ s/^\[(.*)\]$/$1/; 362 $uhost =~ s/^\[(.*)\]$/$1/;
284 $upath .= "?$query" if length $query; 363 $upath .= "?$query" if length $query;
285 364
286 $upath =~ s%^/?%/%; 365 $upath =~ s%^/?%/%;
… …
317 } 396 }
318 397
319 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path 398 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
320 399
321 if ($proxy) { 400 if ($proxy) {
322 ($rhost, $rport, $rscheme, $rpath) = (@$proxy, $url); 401 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
323 402
324 # don't support https requests over https-proxy transport, 403 # don't support https requests over https-proxy transport,
325 # can't be done with tls as spec'ed. 404 # can't be done with tls as spec'ed, unless you double-encrypt.
326 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; 405 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
327 } else { 406 } else {
328 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); 407 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
329 } 408 }
330 409
331 $hdr{host} = $uhost; 410 $hdr{"user-agent"} ||= $USERAGENT;
411 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
412
332 $hdr{"content-length"} = length $arg{body}; 413 $hdr{"content-length"} = length $arg{body};
333 414
334 my %state = (connect_guard => 1); 415 my %state = (connect_guard => 1);
335 416
336 _get_slot $uhost, sub { 417 _get_slot $uhost, sub {
… …
338 419
339 return unless $state{connect_guard}; 420 return unless $state{connect_guard};
340 421
341 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 422 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
342 $state{fh} = shift 423 $state{fh} = shift
424 or do {
425 my $err = "$!";
426 %state = ();
343 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); 427 return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
428 };
344 429
345 delete $state{connect_guard}; # reduce memory usage, save a tree 430 pop; # free memory, save a tree
431
432 return unless delete $state{connect_guard};
346 433
347 # get handle 434 # get handle
348 $state{handle} = new AnyEvent::Handle 435 $state{handle} = new AnyEvent::Handle
349 fh => $state{fh}; 436 fh => $state{fh},
437 timeout => $timeout,
438 peername => $rhost,
439 tls_ctx => $arg{tls_ctx};
350 440
351 # limit the number of persistent connections 441 # limit the number of persistent connections
442 # keepalive not yet supported
352 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 443 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
353 ++$KA_COUNT{$_[1]}; 444 ++$KA_COUNT{$_[1]};
354 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 445 $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
446 --$KA_COUNT{$_[1]}
447 };
355 $hdr{connection} = "keep-alive"; 448 $hdr{connection} = "keep-alive";
356 delete $hdr{connection}; # keep-alive not yet supported
357 } else { 449 } else {
358 delete $hdr{connection}; 450 delete $hdr{connection};
359 } 451 }
360 452
361 # (re-)configure handle 453 # (re-)configure handle
362 $state{handle}->timeout ($timeout);
363 $state{handle}->on_error (sub { 454 $state{handle}->on_error (sub {
364 my $errno = "$!";
365 %state = (); 455 %state = ();
366 $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); 456 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
367 }); 457 });
368 $state{handle}->on_eof (sub { 458 $state{handle}->on_eof (sub {
369 %state = (); 459 %state = ();
370 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); 460 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
371 }); 461 });
372 462
373 $state{handle}->starttls ("connect") if $rscheme eq "https"; 463 $state{handle}->starttls ("connect") if $rscheme eq "https";
374 464
375 # handle actual, non-tunneled, request 465 # handle actual, non-tunneled, request
376 my $handle_actual_request = sub { 466 my $handle_actual_request = sub {
377# $state{handle}->starttls ("connect") if $uscheme eq "https"; 467 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
378 468
379 # send request 469 # send request
380 $state{handle}->push_write ( 470 $state{handle}->push_write (
381 "$method $rpath HTTP/1.0\015\012" 471 "$method $rpath HTTP/1.0\015\012"
382 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) 472 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
… …
385 ); 475 );
386 476
387 %hdr = (); # reduce memory usage, save a kitten 477 %hdr = (); # reduce memory usage, save a kitten
388 478
389 # status line 479 # status line
390 $state{handle}->push_read (line => qr/\015?\012/, sub { 480 $state{handle}->push_read (line => $qr_nl, sub {
391 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 481 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
392 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url })); 482 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
393 483
394 my %hdr = ( # response headers 484 my %hdr = ( # response headers
395 HTTPVersion => ",$1", 485 HTTPVersion => ",$1",
396 Status => ",$2", 486 Status => ",$2",
397 Reason => ",$3", 487 Reason => ",$3",
398 URL => ",$url" 488 URL => ",$url"
399 ); 489 );
400 490
401 # headers, could be optimized a bit 491 # headers, could be optimized a bit
402 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 492 $state{handle}->unshift_read (line => $qr_nlnl, sub {
403 for ("$_[1]\012") { 493 for ("$_[1]\012") {
404 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 494 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
405 495
406 # we support spaces in field names, as lotus domino 496 # things seen, not parsed:
407 # creates them (actually spaces around seperators 497 # p3pP="NON CUR OTPi OUR NOR UNI"
408 # are strictly allowed in http, they are a security issue). 498
409 $hdr{lc $1} .= ",$2" 499 $hdr{lc $1} .= ",$2"
410 while /\G 500 while /\G
411 ([^:\000-\037]+): 501 ([^:\000-\037]*):
412 [\011\040]* 502 [\011\040]*
413 ((?: [^\012]+ | \012[\011\040] )*) 503 ((?: [^\012]+ | \012[\011\040] )*)
414 \012 504 \012
415 /gxc; 505 /gxc;
416 506
417 /\G$/ 507 /\G$/
418 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url })); 508 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
419 } 509 }
420 510
421 substr $_, 0, 1, "" 511 substr $_, 0, 1, ""
422 for values %hdr; 512 for values %hdr;
423 513
514 # redirect handling
515 # microsoft and other shitheads don't give a shit for following standards,
516 # try to support some common forms of broken Location headers.
517 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
518 $hdr{location} =~ s/^\.\/+//;
519
520 my $url = "$rscheme://$uhost:$uport";
521
522 unless ($hdr{location} =~ s/^\///) {
523 $url .= $upath;
524 $url =~ s/\/[^\/]*$//;
525 }
526
527 $hdr{location} = "$url/$hdr{location}";
528 }
529
530 my $redirect;
531
532 if ($recurse) {
533 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
534 # apparently, mozilla et al. just change POST to GET here
535 # more research is needed before we do the same
536 $redirect = 1;
537 } elsif ($hdr{Status} == 303) {
538 # even http/1.1 is unclear on how to mutate the method
539 $method = "GET" unless $method eq "HEAD";
540 $redirect = 1;
541 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) {
542 $redirect = 1;
543 }
544 }
545
424 my $finish = sub { 546 my $finish = sub {
425 # TODO: use destroy method, when/if available
426 #$state{handle}->destroy; 547 $state{handle}->destroy if $state{handle};
427 $state{handle}->on_eof (undef);
428 $state{handle}->on_error (undef);
429 %state = (); 548 %state = ();
430 549
431 # set-cookie processing 550 # set-cookie processing
432 if ($arg{cookie_jar}) { 551 if ($arg{cookie_jar}) {
433 for ($hdr{"set-cookie"}) { 552 for ($_[1]{"set-cookie"}) {
434 # parse NAME=VALUE 553 # parse NAME=VALUE
435 my @kv; 554 my @kv;
436 555
437 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { 556 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
438 my $name = $1; 557 my $name = $1;
… …
476 595
477 redo if /\G\s*,/gc; 596 redo if /\G\s*,/gc;
478 } 597 }
479 } 598 }
480 599
481 # microsoft and other shitheads don't give a shit for following standards, 600 if ($redirect) {
482 # try to support some common forms of broken Location headers. 601 # we ignore any errors, as it is very common to receive
483 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 602 # Content-Length != 0 but no actual body
484 $_[1]{location} =~ s/^\.\/+//; 603 # we also access %hdr, as $_[1] might be an erro
485
486 my $url = "$rscheme://$uhost:$uport";
487
488 unless ($_[1]{location} =~ s/^\///) {
489 $url .= $upath;
490 $url =~ s/\/[^\/]*$//;
491 }
492
493 $_[1]{location} = "$url/$_[1]{location}";
494 }
495
496 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
497 # apparently, mozilla et al. just change POST to GET here
498 # more research is needed before we do the same
499 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
500 } elsif ($_[1]{Status} == 303 && $recurse) {
501 # even http/1.1 is unclear on how to mutate the method
502 $method = "GET" unless $method eq "HEAD";
503 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 604 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
504 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
505 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
506 } else { 605 } else {
507 $cb->($_[0], $_[1]); 606 $cb->($_[0], $_[1]);
508 } 607 }
509 }; 608 };
510 609
511 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { 610 my $len = $hdr{"content-length"};
611
612 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
613 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
614 } elsif (
615 $hdr{Status} =~ /^(?:1..|[23]04)$/
616 or $method eq "HEAD"
617 or (defined $len && !$len)
618 ) {
619 # no body
512 $finish->(undef, \%hdr); 620 $finish->("", \%hdr);
513 } else { 621 } else {
514 if (exists $hdr{"content-length"}) { 622 # body handling, four different code paths
515 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 623 # for want_body_handle, on_body (2x), normal (2x)
516 # could cache persistent connection now 624 # we might read too much here, but it does not matter yet (no pers. connections)
517 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 625 if (!$redirect && $arg{want_body_handle}) {
518 # but we don't, due to misdesigns, this is annoyingly complex 626 $_[0]->on_eof (undef);
627 $_[0]->on_error (undef);
628 $_[0]->on_read (undef);
629
630 $finish->(delete $state{handle}, \%hdr);
631
632 } elsif ($arg{on_body}) {
633 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
634 if ($len) {
635 $_[0]->on_eof (undef);
636 $_[0]->on_read (sub {
637 $len -= length $_[0]{rbuf};
638
639 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
640 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
641
642 $len > 0
643 or $finish->("", \%hdr);
519 }; 644 });
520 645 } else {
646 $_[0]->on_eof (sub {
521 $finish->($_[1], \%hdr); 647 $finish->("", \%hdr);
648 });
649 $_[0]->on_read (sub {
650 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
651 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
652 });
522 }); 653 }
523 } else { 654 } else {
524 # too bad, need to read until we get an error or EOF,
525 # no way to detect winged data.
526 $_[0]->on_error (sub {
527 $finish->($_[0]{rbuf}, \%hdr);
528 });
529 $_[0]->on_eof (undef); 655 $_[0]->on_eof (undef);
656
657 if ($len) {
658 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
659 $_[0]->on_read (sub {
660 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
661 if $len <= length $_[0]{rbuf};
662 });
663 } else {
664 $_[0]->on_error (sub {
665 $! == Errno::EPIPE || !$!
666 ? $finish->(delete $_[0]{rbuf}, \%hdr)
667 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
668 });
530 $_[0]->on_read (sub { }); 669 $_[0]->on_read (sub { });
670 }
531 } 671 }
532 } 672 }
533 }); 673 });
534 }); 674 });
535 }; 675 };
… …
538 if ($proxy && $uscheme eq "https") { 678 if ($proxy && $uscheme eq "https") {
539 # oh dear, we have to wrap it into a connect request 679 # oh dear, we have to wrap it into a connect request
540 680
541 # maybe re-use $uauthority with patched port? 681 # maybe re-use $uauthority with patched port?
542 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); 682 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
543 $state{handle}->push_read (line => qr/\015?\012\015?\012/, sub { 683 $state{handle}->push_read (line => $qr_nlnl, sub {
544 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 684 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
545 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid proxy connect response ($_[1])", URL => $url })); 685 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
546 686
547 if ($2 == 200) { 687 if ($2 == 200) {
548 $rpath = $upath; 688 $rpath = $upath;
549 &$handle_actual_request; 689 &$handle_actual_request;
550 } else { 690 } else {
… …
596The default value for the C<recurse> request parameter (default: C<10>). 736The default value for the C<recurse> request parameter (default: C<10>).
597 737
598=item $AnyEvent::HTTP::USERAGENT 738=item $AnyEvent::HTTP::USERAGENT
599 739
600The default value for the C<User-Agent> header (the default is 740The default value for the C<User-Agent> header (the default is
601C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 741C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
602 742
603=item $AnyEvent::HTTP::MAX_PERSISTENT 743=item $AnyEvent::HTTP::MAX_PER_HOST
604 744
605The maximum number of persistent connections to keep open (default: 8). 745The maximum number of concurrent conenctions to the same host (identified
746by the hostname). If the limit is exceeded, then the additional requests
747are queued until previous connections are closed.
606 748
607Not implemented currently. 749The default value for this is C<4>, and it is highly advisable to not
608 750increase it.
609=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
610
611The maximum time to cache a persistent connection, in seconds (default: 2).
612
613Not implemented currently.
614 751
615=item $AnyEvent::HTTP::ACTIVE 752=item $AnyEvent::HTTP::ACTIVE
616 753
617The number of active connections. This is not the number of currently 754The number of active connections. This is not the number of currently
618running requests, but the number of currently open and non-idle TCP 755running requests, but the number of currently open and non-idle TCP
… …
636=head1 AUTHOR 773=head1 AUTHOR
637 774
638 Marc Lehmann <schmorp@schmorp.de> 775 Marc Lehmann <schmorp@schmorp.de>
639 http://home.schmorp.de/ 776 http://home.schmorp.de/
640 777
778With many thanks to Дмитрий Шалашов, who provided countless
779testcases and bugreports.
780
641=cut 781=cut
642 782
6431 7831
644 784

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