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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.23 by root, Wed Jul 2 01:23:41 2008 UTC vs.
Revision 1.41 by root, Sun Jul 5 23:50:59 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 4.452 ();
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 = '1.03'; 53our $VERSION = '1.12';
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
… …
71my %CO_SLOT; # number of open connections, and wait queue, per host 71my %CO_SLOT; # number of open connections, and wait queue, per host
72 72
73=item http_get $url, key => value..., $cb->($data, $headers) 73=item http_get $url, key => value..., $cb->($data, $headers)
74 74
75Executes an HTTP-GET request. See the http_request function for details on 75Executes an HTTP-GET request. See the http_request function for details on
76additional parameters. 76additional parameters and the return value.
77 77
78=item http_head $url, key => value..., $cb->($data, $headers) 78=item http_head $url, key => value..., $cb->($data, $headers)
79 79
80Executes an HTTP-HEAD request. See the http_request function for details on 80Executes an HTTP-HEAD request. See the http_request function for details
81additional parameters. 81on additional parameters and the return value.
82 82
83=item http_post $url, $body, key => value..., $cb->($data, $headers) 83=item http_post $url, $body, key => value..., $cb->($data, $headers)
84 84
85Executes an HTTP-POST request with a request body of C<$bod>. See the 85Executes an HTTP-POST request with a request body of C<$body>. See the
86http_request function for details on additional parameters. 86http_request function for details on additional parameters and the return
87value.
87 88
88=item http_request $method => $url, key => value..., $cb->($data, $headers) 89=item http_request $method => $url, key => value..., $cb->($data, $headers)
89 90
90Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL 91Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
91must be an absolute http or https URL. 92must be an absolute http or https URL.
93
94When called in void context, nothing is returned. In other contexts,
95C<http_request> returns a "cancellation guard" - you have to keep the
96object at least alive until the callback get called. If the object gets
97destroyed before the callbakc is called, the request will be cancelled.
92 98
93The callback will be called with the response data as first argument 99The callback will be called with the response data as first argument
94(or C<undef> if it wasn't available due to errors), and a hash-ref with 100(or C<undef> if it wasn't available due to errors), and a hash-ref with
95response headers as second argument. 101response headers as second argument.
96 102
… …
98headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason> 104headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
99contain the three parts of the HTTP Status-Line of the same name. The 105contain the three parts of the HTTP Status-Line of the same name. The
100pseudo-header C<URL> contains the original URL (which can differ from the 106pseudo-header C<URL> contains the original URL (which can differ from the
101requested URL when following redirects). 107requested URL when following redirects).
102 108
103If the server sends a header multiple lines, then their contents will be 109If the server sends a header multiple times, then their contents will be
104joined together with C<\x00>. 110joined together with a comma (C<,>), as per the HTTP spec.
105 111
106If an internal error occurs, such as not being able to resolve a hostname, 112If an internal error occurs, such as not being able to resolve a hostname,
107then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> 113then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x>
108and the C<Reason> pseudo-header will contain an error message. 114(usually C<599>) and the C<Reason> pseudo-header will contain an error
115message.
109 116
110A typical callback might look like this: 117A typical callback might look like this:
111 118
112 sub { 119 sub {
113 my ($body, $hdr) = @_; 120 my ($body, $hdr) = @_;
… …
159based on the original netscape specification. 166based on the original netscape specification.
160 167
161The C<$hash_ref> must be an (initially empty) hash reference which will 168The C<$hash_ref> must be an (initially empty) hash reference which will
162get updated automatically. It is possible to save the cookie_jar to 169get updated automatically. It is possible to save the cookie_jar to
163persistent storage with something like JSON or Storable, but this is not 170persistent storage with something like JSON or Storable, but this is not
164recommended, as expire times are currently being ignored. 171recommended, as expiry times are currently being ignored.
165 172
166Note that this cookie implementation is not of very high quality, nor 173Note that this cookie implementation is not of very high quality, nor
167meant 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
168do 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
169cookie-using sites working. Cookies are a privacy disaster, do not use 176cookie-using sites working. Cookies are a privacy disaster, do not use
170them 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 => $callback->($hdr)
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
205=item on_body => $callback->($data, $hdr)
206
207When specified, all body data will be "filtered" through this callback.
208
209The callback will incrementally receive body data, and is supposed to
210return it or a modified version of it (empty strings are valid returns).
211
212If the callback returns C<undef>, then the request will be cancelled.
213
214This callback is useful when you want to do some processing on the data,
215or the data is too large to be held in memory (so the callback writes it
216to a file and returns the empty string) and so on.
217
218It is usually preferred over doing your own body handling via
219C<want_body_handle>.
220
221=item want_body_handle => $enable
222
223When enabled (default is disabled), the behaviour of AnyEvent::HTTP
224changes considerably: after parsing the headers, and instead of
225downloading the body (if any), the completion callback will be
226called. Instead of the C<$body> argument containing the body data, the
227callback will receive the L<AnyEvent::Handle> object associated with the
228connection. In error cases, C<undef> will be passed. When there is no body
229(e.g. status C<304>), the empty string will be passed.
230
231The handle object might or might not be in TLS mode, might be connected to
232a proxy, be a persistent connection etc., and configured in unspecified
233ways. The user is responsible for this handle (it will not be used by this
234module anymore).
235
236This is useful with some push-type services, where, after the initial
237headers, an interactive protocol is used (typical example would be the
238push-style twitter API which starts a JSON/XML stream).
239
240If you think you need this, first have a look at C<on_body>, to see if
241that doesn'T solve your problem in a better way.
171 242
172=back 243=back
173 244
174Example: make a simple HTTP GET request for http://www.nethype.de/ 245Example: make a simple HTTP GET request for http://www.nethype.de/
175 246
… …
188 my ($body, $hdr) = @_; 259 my ($body, $hdr) = @_;
189 use Data::Dumper; 260 use Data::Dumper;
190 print Dumper $hdr; 261 print Dumper $hdr;
191 } 262 }
192 ; 263 ;
264
265Example: make another simple HTTP GET request, but immediately try to
266cancel it.
267
268 my $request = http_request GET => "http://www.nethype.de/", sub {
269 my ($body, $hdr) = @_;
270 print "$body\n";
271 };
272
273 undef $request;
193 274
194=cut 275=cut
195 276
196sub _slot_schedule; 277sub _slot_schedule;
197sub _slot_schedule($) { 278sub _slot_schedule($) {
… …
221 push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; 302 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
222 303
223 _slot_schedule $_[0]; 304 _slot_schedule $_[0];
224} 305}
225 306
307our $qr_nl = qr<\015?\012>;
308our $qr_nlnl = qr<\015?\012\015?\012>;
309
310our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 };
311our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" };
312
226sub http_request($$@) { 313sub http_request($$@) {
227 my $cb = pop; 314 my $cb = pop;
228 my ($method, $url, %arg) = @_; 315 my ($method, $url, %arg) = @_;
229 316
230 my %hdr; 317 my %hdr;
318
319 $arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx};
320 $arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
231 321
232 $method = uc $method; 322 $method = uc $method;
233 323
234 if (my $hdr = $arg{headers}) { 324 if (my $hdr = $arg{headers}) {
235 while (my ($k, $v) = each %$hdr) { 325 while (my ($k, $v) = each %$hdr) {
… …
237 } 327 }
238 } 328 }
239 329
240 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; 330 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
241 331
242 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url }) 332 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
243 if $recurse < 0; 333 if $recurse < 0;
244 334
245 my $proxy = $arg{proxy} || $PROXY; 335 my $proxy = $arg{proxy} || $PROXY;
246 my $timeout = $arg{timeout} || $TIMEOUT; 336 my $timeout = $arg{timeout} || $TIMEOUT;
247 337
248 $hdr{"user-agent"} ||= $USERAGENT;
249
250 my ($scheme, $authority, $upath, $query, $fragment) = 338 my ($uscheme, $uauthority, $upath, $query, $fragment) =
251 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; 339 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
252 340
253 $scheme = lc $scheme; 341 $uscheme = lc $uscheme;
254 342
255 my $uport = $scheme eq "http" ? 80 343 my $uport = $uscheme eq "http" ? 80
256 : $scheme eq "https" ? 443 344 : $uscheme eq "https" ? 443
257 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url }); 345 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url });
258 346
259 $hdr{referer} ||= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic
260
261 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x 347 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
262 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url }); 348 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
263 349
264 my $uhost = $1; 350 my $uhost = $1;
265 $uport = $2 if defined $2; 351 $uport = $2 if defined $2;
266 352
267 $uhost =~ s/^\[(.*)\]$/$1/; 353 $uhost =~ s/^\[(.*)\]$/$1/;
… …
269 355
270 $upath =~ s%^/?%/%; 356 $upath =~ s%^/?%/%;
271 357
272 # cookie processing 358 # cookie processing
273 if (my $jar = $arg{cookie_jar}) { 359 if (my $jar = $arg{cookie_jar}) {
274 %$jar = () if $jar->{version} < 1; 360 %$jar = () if $jar->{version} != 1;
275 361
276 my @cookie; 362 my @cookie;
277 363
278 while (my ($chost, $v) = each %$jar) { 364 while (my ($chost, $v) = each %$jar) {
365 if ($chost =~ /^\./) {
279 next unless $chost eq substr $uhost, -length $chost; 366 next unless $chost eq substr $uhost, -length $chost;
280 next unless $chost =~ /^\./; 367 } elsif ($chost =~ /\./) {
368 next unless $chost eq $uhost;
369 } else {
370 next;
371 }
281 372
282 while (my ($cpath, $v) = each %$v) { 373 while (my ($cpath, $v) = each %$v) {
283 next unless $cpath eq substr $upath, 0, length $cpath; 374 next unless $cpath eq substr $upath, 0, length $cpath;
284 375
285 while (my ($k, $v) = each %$v) { 376 while (my ($k, $v) = each %$v) {
286 next if $scheme ne "https" && exists $v->{secure}; 377 next if $uscheme ne "https" && exists $v->{secure};
378 my $value = $v->{value};
379 $value =~ s/([\\"])/\\$1/g;
287 push @cookie, "$k=$v->{value}"; 380 push @cookie, "$k=\"$value\"";
288 } 381 }
289 } 382 }
290 } 383 }
291 384
292 $hdr{cookie} = join "; ", @cookie 385 $hdr{cookie} = join "; ", @cookie
293 if @cookie; 386 if @cookie;
294 } 387 }
295 388
296 my ($rhost, $rport, $rpath); # request host, port, path 389 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
297 390
298 if ($proxy) { 391 if ($proxy) {
299 ($rhost, $rport, $scheme) = @$proxy; 392 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
300 $rpath = $url; 393
394 # don't support https requests over https-proxy transport,
395 # can't be done with tls as spec'ed, unless you double-encrypt.
396 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
301 } else { 397 } else {
302 ($rhost, $rport, $rpath) = ($uhost, $uport, $upath); 398 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
303 $hdr{host} = $uhost;
304 } 399 }
305 400
401 $hdr{"user-agent"} ||= $USERAGENT;
402 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
403
404 $hdr{host} = "$uhost:$uport";
306 $hdr{"content-length"} = length $arg{body}; 405 $hdr{"content-length"} = length $arg{body};
307 406
308 my %state = (connect_guard => 1); 407 my %state = (connect_guard => 1);
309 408
310 _get_slot $uhost, sub { 409 _get_slot $uhost, sub {
… …
312 411
313 return unless $state{connect_guard}; 412 return unless $state{connect_guard};
314 413
315 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { 414 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
316 $state{fh} = shift 415 $state{fh} = shift
317 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); 416 or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url }));
417 pop; # free memory, save a tree
318 418
319 delete $state{connect_guard}; # reduce memory usage, save a tree 419 return unless delete $state{connect_guard};
320 420
321 # get handle 421 # get handle
322 $state{handle} = new AnyEvent::Handle 422 $state{handle} = new AnyEvent::Handle
323 fh => $state{fh}, 423 fh => $state{fh},
324 ($scheme eq "https" ? (tls => "connect") : ()); 424 timeout => $timeout,
425 peername => $rhost,
426 tls_ctx => $arg{tls_ctx};
325 427
326 # limit the number of persistent connections 428 # limit the number of persistent connections
429 # keepalive not yet supported
327 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 430 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
328 ++$KA_COUNT{$_[1]}; 431 ++$KA_COUNT{$_[1]};
329 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 432 $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
433 --$KA_COUNT{$_[1]}
434 };
330 $hdr{connection} = "keep-alive"; 435 $hdr{connection} = "keep-alive";
331 delete $hdr{connection}; # keep-alive not yet supported
332 } else { 436 } else {
333 delete $hdr{connection}; 437 delete $hdr{connection};
334 } 438 }
335 439
336 # (re-)configure handle 440 # (re-)configure handle
337 $state{handle}->timeout ($timeout);
338 $state{handle}->on_error (sub { 441 $state{handle}->on_error (sub {
339 my $errno = "$!";
340 %state = (); 442 %state = ();
341 $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); 443 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
342 }); 444 });
343 $state{handle}->on_eof (sub { 445 $state{handle}->on_eof (sub {
344 %state = (); 446 %state = ();
345 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); 447 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
346 }); 448 });
347 449
450 $state{handle}->starttls ("connect") if $rscheme eq "https";
451
452 # handle actual, non-tunneled, request
453 my $handle_actual_request = sub {
454 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
455
348 # send request 456 # send request
349 $state{handle}->push_write ( 457 $state{handle}->push_write (
350 "$method $rpath HTTP/1.0\015\012" 458 "$method $rpath HTTP/1.0\015\012"
351 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) 459 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
352 . "\015\012" 460 . "\015\012"
353 . (delete $arg{body}) 461 . (delete $arg{body})
354 );
355
356 %hdr = (); # reduce memory usage, save a kitten
357
358 # status line
359 $state{handle}->push_read (line => qr/\015?\012/, sub {
360 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
361 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
362
363 my %hdr = ( # response headers
364 HTTPVersion => "\x00$1",
365 Status => "\x00$2",
366 Reason => "\x00$3",
367 URL => "\x00$url"
368 ); 462 );
369 463
464 %hdr = (); # reduce memory usage, save a kitten
465
466 # status line
467 $state{handle}->push_read (line => $qr_nl, sub {
468 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
469 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
470
471 my %hdr = ( # response headers
472 HTTPVersion => ",$1",
473 Status => ",$2",
474 Reason => ",$3",
475 URL => ",$url"
476 );
477
370 # headers, could be optimized a bit 478 # headers, could be optimized a bit
371 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 479 $state{handle}->unshift_read (line => $qr_nlnl, sub {
372 for ("$_[1]\012") { 480 for ("$_[1]\012") {
373 # we support spaces in field names, as lotus domino 481 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
374 # creates them. 482
483 # things seen, not parsed:
484 # p3pP="NON CUR OTPi OUR NOR UNI"
485
375 $hdr{lc $1} .= "\x00$2" 486 $hdr{lc $1} .= ",$2"
376 while /\G 487 while /\G
377 ([^:\000-\037]+): 488 ([^:\000-\037]+):
378 [\011\040]* 489 [\011\040]*
379 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 490 ((?: [^\012]+ | \012[\011\040] )*)
380 \015?\012 491 \012
381 /gxc; 492 /gxc;
382 493
383 /\G$/ 494 /\G$/
384 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url })); 495 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
385 } 496 }
386 497
387 substr $_, 0, 1, "" 498 substr $_, 0, 1, ""
388 for values %hdr; 499 for values %hdr;
389 500
390 my $finish = sub { 501 # redirect handling
391 %state = (); 502 # microsoft and other shitheads don't give a shit for following standards,
503 # try to support some common forms of broken Location headers.
504 if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
505 $hdr{location} =~ s/^\.\/+//;
392 506
393 # set-cookie processing 507 my $url = "$rscheme://$uhost:$uport";
394 if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
395 for (split /\x00/, $hdr{"set-cookie"}) {
396 my ($cookie, @arg) = split /;\s*/;
397 my ($name, $value) = split /=/, $cookie, 2;
398 my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
399
400 my $cdom = (delete $kv{domain}) || $uhost;
401 my $cpath = (delete $kv{path}) || "/";
402
403 $cdom =~ s/^.?/./; # make sure it starts with a "."
404 508
405 next if $cdom =~ /\.$/; 509 unless ($hdr{location} =~ s/^\///) {
406 510 $url .= $upath;
407 # this is not rfc-like and not netscape-like. go figure. 511 $url =~ s/\/[^\/]*$//;
408 my $ndots = $cdom =~ y/.//; 512 }
409 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2); 513
410 514 $hdr{location} = "$url/$hdr{location}";
515 }
516
517 my $redirect;
518
519 if ($recurse) {
520 if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") {
521 # apparently, mozilla et al. just change POST to GET here
522 # more research is needed before we do the same
411 # store it 523 $redirect = 1;
412 $arg{cookie_jar}{version} = 1; 524 } elsif ($hdr{Status} == 303) {
413 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv; 525 # even http/1.1 is unclear on how to mutate the method
526 $method = "GET" unless $method eq "HEAD";
527 $redirect = 1;
528 } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) {
529 $redirect = 1;
414 } 530 }
415 } 531 }
416 532
417 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") { 533 my $finish = sub {
418 # microsoft and other assholes don't give a shit for following standards, 534 $state{handle}->destroy if $state{handle};
419 # try to support a common form of broken Location header. 535 %state = ();
420 $_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;
421 536
422 # apparently, mozilla et al. just change POST to GET here 537 # set-cookie processing
423 # more research is needed before we do the same 538 if ($arg{cookie_jar}) {
539 for ($_[1]{"set-cookie"}) {
540 # parse NAME=VALUE
541 my @kv;
424 542
543 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
544 my $name = $1;
545 my $value = $3;
546
547 unless ($value) {
548 $value = $2;
549 $value =~ s/\\(.)/$1/gs;
550 }
551
552 push @kv, $name => $value;
553
554 last unless /\G\s*;/gc;
555 }
556
557 last unless @kv;
558
559 my $name = shift @kv;
560 my %kv = (value => shift @kv, @kv);
561
562 my $cdom;
563 my $cpath = (delete $kv{path}) || "/";
564
565 if (exists $kv{domain}) {
566 $cdom = delete $kv{domain};
567
568 $cdom =~ s/^\.?/./; # make sure it starts with a "."
569
570 next if $cdom =~ /\.$/;
571
572 # this is not rfc-like and not netscape-like. go figure.
573 my $ndots = $cdom =~ y/.//;
574 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
575 } else {
576 $cdom = $uhost;
577 }
578
579 # store it
580 $arg{cookie_jar}{version} = 1;
581 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
582
583 redo if /\G\s*,/gc;
584 }
585 }
586
587 if ($redirect) {
588 # we ignore any errors, as it is very common to receive
589 # Content-Length != 0 but no actual body
590 # we also access %hdr, as $_[1] might be an erro
425 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 591 http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb);
426 } elsif ($_[1]{Status} == 303 && $recurse) { 592 } else {
427 $_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%; 593 $cb->($_[0], $_[1]);
594 }
595 };
428 596
429 http_request (GET => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 597 my $len = $hdr{"content-length"};
598
599 if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) {
600 $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url });
601 } elsif (
602 $hdr{Status} =~ /^(?:1..|204|304)$/
603 or $method eq "HEAD"
604 or (defined $len && !$len)
605 ) {
606 # no body
607 $finish->("", \%hdr);
430 } else { 608 } else {
431 $cb->($_[0], $_[1]); 609 # body handling, four different code paths
610 # for want_body_handle, on_body (2x), normal (2x)
611 # we might read too much here, but it does not matter yet (no pers. connections)
612 if (!$redirect && $arg{want_body_handle}) {
613 $_[0]->on_eof (undef);
614 $_[0]->on_error (undef);
615 $_[0]->on_read (undef);
616
617 $finish->(delete $state{handle}, \%hdr);
618
619 } elsif ($arg{on_body}) {
620 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
621 if ($len) {
622 $_[0]->on_eof (undef);
623 $_[0]->on_read (sub {
624 $len -= length $_[0]{rbuf};
625
626 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
627 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
628
629 $len > 0
630 or $finish->("", \%hdr);
631 });
632 } else {
633 $_[0]->on_eof (sub {
634 $finish->("", \%hdr);
635 });
636 $_[0]->on_read (sub {
637 $arg{on_body}(delete $_[0]{rbuf}, \%hdr)
638 or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url });
639 });
640 }
641 } else {
642 $_[0]->on_eof (undef);
643
644 if ($len) {
645 $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) });
646 $_[0]->on_read (sub {
647 $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr)
648 if $len <= length $_[0]{rbuf};
649 });
650 } else {
651 $_[0]->on_error (sub {
652 $! == Errno::EPIPE
653 ? $finish->(delete $_[0]{rbuf}, \%hdr)
654 : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url });
655 });
656 $_[0]->on_read (sub { });
657 }
658 }
432 } 659 }
433 }; 660 });
661 });
662 };
434 663
435 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { 664 # now handle proxy-CONNECT method
436 $finish->(undef, \%hdr); 665 if ($proxy && $uscheme eq "https") {
666 # oh dear, we have to wrap it into a connect request
667
668 # maybe re-use $uauthority with patched port?
669 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
670 $state{handle}->push_read (line => $qr_nlnl, sub {
671 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
672 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
673
674 if ($2 == 200) {
675 $rpath = $upath;
676 &$handle_actual_request;
437 } else { 677 } else {
438 if (exists $hdr{"content-length"}) { 678 %state = ();
439 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 679 $cb->(undef, { Status => $2, Reason => $3, URL => $url });
440 # could cache persistent connection now
441 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
442 # but we don't, due to misdesigns, this is annoyingly complex
443 };
444
445 $finish->($_[1], \%hdr);
446 });
447 } else {
448 # too bad, need to read until we get an error or EOF,
449 # no way to detect winged data.
450 $_[0]->on_error (sub {
451 $finish->($_[0]{rbuf}, \%hdr);
452 });
453 $_[0]->on_eof (undef);
454 $_[0]->on_read (sub { });
455 }
456 } 680 }
457 }); 681 });
682 } else {
683 &$handle_actual_request;
458 }); 684 }
685
459 }, sub { 686 }, sub {
460 $timeout 687 $timeout
461 }; 688 };
462 }; 689 };
463 690
… …
496The default value for the C<recurse> request parameter (default: C<10>). 723The default value for the C<recurse> request parameter (default: C<10>).
497 724
498=item $AnyEvent::HTTP::USERAGENT 725=item $AnyEvent::HTTP::USERAGENT
499 726
500The default value for the C<User-Agent> header (the default is 727The default value for the C<User-Agent> header (the default is
501C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 728C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
502 729
503=item $AnyEvent::HTTP::MAX_PERSISTENT 730=item $AnyEvent::HTTP::MAX_PERSISTENT
504 731
505The maximum number of persistent connections to keep open (default: 8). 732The maximum number of persistent connections to keep open (default: 8).
506 733
… …
536=head1 AUTHOR 763=head1 AUTHOR
537 764
538 Marc Lehmann <schmorp@schmorp.de> 765 Marc Lehmann <schmorp@schmorp.de>
539 http://home.schmorp.de/ 766 http://home.schmorp.de/
540 767
768With many thanks to Дмитрий Шалашов, who provided countless
769testcases and bugreports.
770
541=cut 771=cut
542 772
5431 7731
544 774

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