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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.33 by root, Mon Oct 27 11:09:54 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
… …
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>, 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"} ||= $USERAGENT;
265
266 my ($uscheme, $uauthority, $upath, $query, $fragment) = 348 my ($uscheme, $uauthority, $upath, $query, $fragment) =
267 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 349 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
268 350
269 $uscheme = lc $uscheme; 351 $uscheme = lc $uscheme;
270 352
271 my $uport = $uscheme eq "http" ? 80 353 my $uport = $uscheme eq "http" ? 80
272 : $uscheme 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
275 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
276 356
277 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/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;
362
363 $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost";
282 364
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 $upath =~ s%^/?%/%;
… …
317 } 399 }
318 400
319 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path 401 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
320 402
321 if ($proxy) { 403 if ($proxy) {
322 ($rhost, $rport, $rscheme, $rpath) = (@$proxy, $url); 404 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
323 405
324 # don't support https requests over https-proxy transport, 406 # don't support https requests over https-proxy transport,
325 # can't be done with tls as spec'ed. 407 # can't be done with tls as spec'ed, unless you double-encrypt.
326 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; 408 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
327 } else { 409 } else {
328 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); 410 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
329 } 411 }
330 412
331 $hdr{host} = $uhost; 413 $hdr{"user-agent"} ||= $USERAGENT;
414 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
415
332 $hdr{"content-length"} = length $arg{body}; 416 $hdr{"content-length"} = length $arg{body};
333 417
334 my %state = (connect_guard => 1); 418 my %state = (connect_guard => 1);
335 419
336 _get_slot $uhost, sub { 420 _get_slot $uhost, sub {
… …
338 422
339 return unless $state{connect_guard}; 423 return unless $state{connect_guard};
340 424
341 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 425 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
342 $state{fh} = shift 426 $state{fh} = shift
427 or do {
428 my $err = "$!";
429 %state = ();
343 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); 430 return $cb->(undef, { Status => 599, Reason => $err, URL => $url });
431 };
344 432
345 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};
346 436
347 # get handle 437 # get handle
348 $state{handle} = new AnyEvent::Handle 438 $state{handle} = new AnyEvent::Handle
349 fh => $state{fh}; 439 fh => $state{fh},
440 timeout => $timeout,
441 peername => $rhost,
442 tls_ctx => $arg{tls_ctx};
350 443
351 # limit the number of persistent connections 444 # limit the number of persistent connections
445 # keepalive not yet supported
352 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 446 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
353 ++$KA_COUNT{$_[1]}; 447 ++$KA_COUNT{$_[1]};
354 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 448 $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
449 --$KA_COUNT{$_[1]}
450 };
355 $hdr{connection} = "keep-alive"; 451 $hdr{connection} = "keep-alive";
356 delete $hdr{connection}; # keep-alive not yet supported
357 } else { 452 } else {
358 delete $hdr{connection}; 453 delete $hdr{connection};
359 } 454 }
360 455
361 # (re-)configure handle 456 # (re-)configure handle
362 $state{handle}->timeout ($timeout);
363 $state{handle}->on_error (sub { 457 $state{handle}->on_error (sub {
364 my $errno = "$!";
365 %state = (); 458 %state = ();
366 $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); 459 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
367 }); 460 });
368 $state{handle}->on_eof (sub { 461 $state{handle}->on_eof (sub {
369 %state = (); 462 %state = ();
370 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); 463 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
371 }); 464 });
372 465
373 $state{handle}->starttls ("connect") if $rscheme eq "https"; 466 $state{handle}->starttls ("connect") if $rscheme eq "https";
374 467
375 # handle actual, non-tunneled, request 468 # handle actual, non-tunneled, request
376 my $handle_actual_request = sub { 469 my $handle_actual_request = sub {
377 $state{handle}->starttls ("connect") if $uscheme eq "https"; 470 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
378 471
379 # send request 472 # send request
380 $state{handle}->push_write ( 473 $state{handle}->push_write (
381 "$method $rpath HTTP/1.0\015\012" 474 "$method $rpath HTTP/1.0\015\012"
382 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) 475 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
… …
385 ); 478 );
386 479
387 %hdr = (); # reduce memory usage, save a kitten 480 %hdr = (); # reduce memory usage, save a kitten
388 481
389 # status line 482 # status line
390 $state{handle}->push_read (line => qr/\015?\012/, sub { 483 $state{handle}->push_read (line => $qr_nl, sub {
391 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 484 $_[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 })); 485 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
393 486
394 my %hdr = ( # response headers 487 my %hdr = ( # response headers
395 HTTPVersion => ",$1", 488 HTTPVersion => ",$1",
396 Status => ",$2", 489 Status => ",$2",
397 Reason => ",$3", 490 Reason => ",$3",
398 URL => ",$url" 491 URL => ",$url"
399 ); 492 );
400 493
401 # headers, could be optimized a bit 494 # headers, could be optimized a bit
402 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 495 $state{handle}->unshift_read (line => $qr_nlnl, sub {
403 for ("$_[1]\012") { 496 for ("$_[1]\012") {
404 y/\015//d; # weed out any \015, as they show up in the weirdest of places. 497 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
405 498
406 # we support spaces in field names, as lotus domino 499 # things seen, not parsed:
407 # creates them (actually spaces around seperators 500 # p3pP="NON CUR OTPi OUR NOR UNI"
408 # are strictly allowed in http, they are a security issue). 501
409 $hdr{lc $1} .= ",$2" 502 $hdr{lc $1} .= ",$2"
410 while /\G 503 while /\G
411 ([^:\000-\037]+): 504 ([^:\000-\037]*):
412 [\011\040]* 505 [\011\040]*
413 ((?: [^\012]+ | \012[\011\040] )*) 506 ((?: [^\012]+ | \012[\011\040] )*)
414 \012 507 \012
415 /gxc; 508 /gxc;
416 509
417 /\G$/ 510 /\G$/
418 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 }));
419 } 512 }
420 513
421 substr $_, 0, 1, "" 514 substr $_, 0, 1, ""
422 for values %hdr; 515 for values %hdr;
423 516
517 # redirect handling
518 # microsoft and other shitheads don't give a shit for following standards,
519 # try to support some common forms of broken Location headers.
520 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
521 $hdr{location} =~ s/^\.\/+//;
522
523 my $url = "$rscheme://$uhost:$uport";
524
525 unless ($hdr{location} =~ s/^\///) {
526 $url .= $upath;
527 $url =~ s/\/[^\/]*$//;
528 }
529
530 $hdr{location} = "$url/$hdr{location}";
531 }
532
533 my $redirect;
534
535 if ($recurse) {
536 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
537 # apparently, mozilla et al. just change POST to GET here
538 # more research is needed before we do the same
539 $redirect = 1;
540 } elsif ($hdr{Status} == 303) {
541 # even http/1.1 is unclear on how to mutate the method
542 $method = "GET" unless $method eq "HEAD";
543 $redirect = 1;
544 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) {
545 $redirect = 1;
546 }
547 }
548
424 my $finish = sub { 549 my $finish = sub {
425 # TODO: use destroy method, when/if available
426 #$state{handle}->destroy; 550 $state{handle}->destroy if $state{handle};
427 $state{handle}->on_eof (undef);
428 $state{handle}->on_error (undef);
429 %state = (); 551 %state = ();
430 552
431 # set-cookie processing 553 # set-cookie processing
432 if ($arg{cookie_jar}) { 554 if ($arg{cookie_jar}) {
433 for ($hdr{"set-cookie"}) { 555 for ($_[1]{"set-cookie"}) {
434 # parse NAME=VALUE 556 # parse NAME=VALUE
435 my @kv; 557 my @kv;
436 558
437 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { 559 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
438 my $name = $1; 560 my $name = $1;
… …
476 598
477 redo if /\G\s*,/gc; 599 redo if /\G\s*,/gc;
478 } 600 }
479 } 601 }
480 602
481 # microsoft and other shitheads don't give a shit for following standards, 603 if ($redirect) {
482 # try to support some common forms of broken Location headers. 604 # we ignore any errors, as it is very common to receive
483 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { 605 # Content-Length != 0 but no actual body
484 $_[1]{location} =~ s/^\.\/+//; 606 # 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, $cb); 607 http_request ($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 { 608 } else {
507 $cb->($_[0], $_[1]); 609 $cb->($_[0], $_[1]);
508 } 610 }
509 }; 611 };
510 612
511 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { 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
512 $finish->(undef, \%hdr); 623 $finish->("", \%hdr);
513 } else { 624 } else {
514 if (exists $hdr{"content-length"}) { 625 # body handling, four different code paths
515 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 626 # for want_body_handle, on_body (2x), normal (2x)
516 # could cache persistent connection now 627 # we might read too much here, but it does not matter yet (no pers. connections)
517 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 628 if (!$redirect && $arg{want_body_handle}) {
518 # but we don't, due to misdesigns, this is annoyingly complex 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);
519 }; 647 });
520 648 } else {
649 $_[0]->on_eof (sub {
521 $finish->($_[1], \%hdr); 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 });
522 }); 656 }
523 } else { 657 } 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); 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 });
530 $_[0]->on_read (sub { }); 672 $_[0]->on_read (sub { });
673 }
531 } 674 }
532 } 675 }
533 }); 676 });
534 }); 677 });
535 }; 678 };
… …
538 if ($proxy && $uscheme eq "https") { 681 if ($proxy && $uscheme eq "https") {
539 # oh dear, we have to wrap it into a connect request 682 # oh dear, we have to wrap it into a connect request
540 683
541 # maybe re-use $uauthority with patched port? 684 # 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"); 685 $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 { 686 $state{handle}->push_read (line => $qr_nlnl, sub {
544 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix 687 $_[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 })); 688 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
546 689
547 if ($2 == 200) { 690 if ($2 == 200) {
548 $rpath = $upath; 691 $rpath = $upath;
549 &$handle_actual_request; 692 &$handle_actual_request;
550 } else { 693 } else {
… …
596The default value for the C<recurse> request parameter (default: C<10>). 739The default value for the C<recurse> request parameter (default: C<10>).
597 740
598=item $AnyEvent::HTTP::USERAGENT 741=item $AnyEvent::HTTP::USERAGENT
599 742
600The default value for the C<User-Agent> header (the default is 743The default value for the C<User-Agent> header (the default is
601C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 744C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
602 745
603=item $AnyEvent::HTTP::MAX_PERSISTENT 746=item $AnyEvent::HTTP::MAX_PER_HOST
604 747
605The 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.
606 751
607Not implemented currently. 752The default value for this is C<4>, and it is highly advisable to not
608 753increase it.
609=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
610
611The maximum time to cache a persistent connection, in seconds (default: 2).
612
613Not implemented currently.
614 754
615=item $AnyEvent::HTTP::ACTIVE 755=item $AnyEvent::HTTP::ACTIVE
616 756
617The number of active connections. This is not the number of currently 757The number of active connections. This is not the number of currently
618running requests, but the number of currently open and non-idle TCP 758running requests, but the number of currently open and non-idle TCP
… …
636=head1 AUTHOR 776=head1 AUTHOR
637 777
638 Marc Lehmann <schmorp@schmorp.de> 778 Marc Lehmann <schmorp@schmorp.de>
639 http://home.schmorp.de/ 779 http://home.schmorp.de/
640 780
781With many thanks to Дмитрий Шалашов, who provided countless
782testcases and bugreports.
783
641=cut 784=cut
642 785
6431 7861
644 787

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