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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.5 by root, Wed Jun 4 12:03:47 2008 UTC vs.
Revision 1.38 by root, Sat Mar 7 03:43:09 2009 UTC

… …
3AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client 3AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client
4 4
5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use AnyEvent::HTTP; 7 use AnyEvent::HTTP;
8
9 http_get "http://www.nethype.de/", sub { print $_[1] };
10
11 # ... do something else here
8 12
9=head1 DESCRIPTION 13=head1 DESCRIPTION
10 14
11This module is an L<AnyEvent> user, you need to make sure that you use and 15This module is an L<AnyEvent> user, you need to make sure that you use and
12run a supported event loop. 16run a supported event loop.
17
18This module implements a simple, stateless and non-blocking HTTP
19client. It supports GET, POST and other request methods, cookies and more,
20all on a very low level. It can follow redirects supports proxies and
21automatically limits the number of connections to the values specified in
22the RFC.
23
24It should generally be a "good client" that is enough for most HTTP
25tasks. Simple tasks should be simple, but complex tasks should still be
26possible as the user retains control over request and response headers.
27
28The caller is responsible for authentication management, cookies (if
29the simplistic implementation in this module doesn't suffice), referer
30and other high-level protocol details for which this module offers only
31limited support.
13 32
14=head2 METHODS 33=head2 METHODS
15 34
16=over 4 35=over 4
17 36
… …
29use AnyEvent::Socket (); 48use AnyEvent::Socket ();
30use AnyEvent::Handle (); 49use AnyEvent::Handle ();
31 50
32use base Exporter::; 51use base Exporter::;
33 52
34our $VERSION = '1.0'; 53our $VERSION = '1.11';
35 54
36our @EXPORT = qw(http_get http_request); 55our @EXPORT = qw(http_get http_post http_head http_request);
37 56
38our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; 57our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
39our $MAX_RECURSE = 10; 58our $MAX_RECURSE = 10;
40our $MAX_PERSISTENT = 8; 59our $MAX_PERSISTENT = 8;
41our $PERSISTENT_TIMEOUT = 2; 60our $PERSISTENT_TIMEOUT = 2;
42our $TIMEOUT = 300; 61our $TIMEOUT = 300;
43 62
44# changing these is evil 63# changing these is evil
45our $MAX_PERSISTENT_PER_HOST = 2; 64our $MAX_PERSISTENT_PER_HOST = 2;
46our $MAX_PER_HOST = 4; # not respected yet :( 65our $MAX_PER_HOST = 4;
47 66
48our $PROXY; 67our $PROXY;
68our $ACTIVE = 0;
49 69
50my %KA_COUNT; # number of open keep-alive connections per host 70my %KA_COUNT; # number of open keep-alive connections per host
71my %CO_SLOT; # number of open connections, and wait queue, per host
51 72
52=item http_get $url, key => value..., $cb->($data, $headers) 73=item http_get $url, key => value..., $cb->($data, $headers)
53 74
54Executes 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
55additional parameters. 76additional parameters and the return value.
56 77
57=item http_head $url, key => value..., $cb->($data, $headers) 78=item http_head $url, key => value..., $cb->($data, $headers)
58 79
59Executes an HTTP-HEAD request. See the http_request function for details on 80Executes an HTTP-HEAD request. See the http_request function for details
60additional parameters. 81on additional parameters and the return value.
61 82
62=item http_post $url, $body, key => value..., $cb->($data, $headers) 83=item http_post $url, $body, key => value..., $cb->($data, $headers)
63 84
64Executes an HTTP-POST request with a requets body of C<$bod>. See the 85Executes an HTTP-POST request with a request body of C<$body>. See the
65http_request function for details on additional parameters. 86http_request function for details on additional parameters and the return
87value.
66 88
67=item http_request $method => $url, key => value..., $cb->($data, $headers) 89=item http_request $method => $url, key => value..., $cb->($data, $headers)
68 90
69Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL 91Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
70must be an absolute http or https URL. 92must be an absolute http or https URL.
93
94When called in void context, nothing is returned. In other contexts,
95C<http_request> returns a "cancellation guard" - you have to keep the
96object at least alive until the callback get called. If the object gets
97destroyed before the callbakc is called, the request will be cancelled.
71 98
72The callback will be called with the response data as first argument 99The callback will be called with the response data as first argument
73(or C<undef> if it wasn't available due to errors), and a hash-ref with 100(or C<undef> if it wasn't available due to errors), and a hash-ref with
74response headers as second argument. 101response headers as second argument.
75 102
76All the headers in that has are lowercased. In addition to the response 103All the headers in that hash are lowercased. In addition to the response
77headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and 104headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
78C<Reason> contain the three parts of the HTTP Status-Line of the same 105contain the three parts of the HTTP Status-Line of the same name. The
79name. 106pseudo-header C<URL> contains the original URL (which can differ from the
107requested URL when following redirects).
108
109If the server sends a header multiple times, then their contents will be
110joined together with a comma (C<,>), as per the HTTP spec.
80 111
81If an internal error occurs, such as not being able to resolve a hostname, 112If an internal error occurs, such as not being able to resolve a hostname,
82then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> 113then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>
83and the C<Reason> pseudo-header will contain an error message. 114and the C<Reason> pseudo-header will contain an error message.
84 115
116A typical callback might look like this:
117
118 sub {
119 my ($body, $hdr) = @_;
120
121 if ($hdr->{Status} =~ /^2/) {
122 ... everything should be ok
123 } else {
124 print "error, $hdr->{Status} $hdr->{Reason}\n";
125 }
126 }
127
85Additional parameters are key-value pairs, and are fully optional. They 128Additional parameters are key-value pairs, and are fully optional. They
86include: 129include:
87 130
88=over 4 131=over 4
89 132
… …
92Whether to recurse requests or not, e.g. on redirects, authentication 135Whether to recurse requests or not, e.g. on redirects, authentication
93retries and so on, and how often to do so. 136retries and so on, and how often to do so.
94 137
95=item headers => hashref 138=item headers => hashref
96 139
97The request headers to use. 140The request headers to use. Currently, C<http_request> may provide its
141own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
142and will provide defaults for C<User-Agent:> and C<Referer:>.
98 143
99=item timeout => $seconds 144=item timeout => $seconds
100 145
101The time-out to use for various stages - each connect attempt will reset 146The time-out to use for various stages - each connect attempt will reset
102the timeout, as will read or write activity. Default timeout is 5 minutes. 147the timeout, as will read or write activity. Default timeout is 5 minutes.
… …
112=item body => $string 157=item body => $string
113 158
114The request body, usually empty. Will be-sent as-is (future versions of 159The request body, usually empty. Will be-sent as-is (future versions of
115this module might offer more options). 160this module might offer more options).
116 161
162=item cookie_jar => $hash_ref
163
164Passing this parameter enables (simplified) cookie-processing, loosely
165based on the original netscape specification.
166
167The C<$hash_ref> must be an (initially empty) hash reference which will
168get updated automatically. It is possible to save the cookie_jar to
169persistent storage with something like JSON or Storable, but this is not
170recommended, as expire times are currently being ignored.
171
172Note that this cookie implementation is not of very high quality, nor
173meant 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
175cookie-using sites working. Cookies are a privacy disaster, do not use
176them unless required to.
177
117=back 178=back
118 179
119=back 180Example: make a simple HTTP GET request for http://www.nethype.de/
181
182 http_request GET => "http://www.nethype.de/", sub {
183 my ($body, $hdr) = @_;
184 print "$body\n";
185 };
186
187Example: make a HTTP HEAD request on https://www.google.com/, use a
188timeout of 30 seconds.
189
190 http_request
191 GET => "https://www.google.com",
192 timeout => 30,
193 sub {
194 my ($body, $hdr) = @_;
195 use Data::Dumper;
196 print Dumper $hdr;
197 }
198 ;
199
200Example: make another simple HTTP GET request, but immediately try to
201cancel it.
202
203 my $request = http_request GET => "http://www.nethype.de/", sub {
204 my ($body, $hdr) = @_;
205 print "$body\n";
206 };
207
208 undef $request;
120 209
121=cut 210=cut
122 211
212sub _slot_schedule;
213sub _slot_schedule($) {
214 my $host = shift;
215
216 while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
217 if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
218 # somebody wants that slot
219 ++$CO_SLOT{$host}[0];
220 ++$ACTIVE;
221
222 $cb->(AnyEvent::Util::guard {
223 --$ACTIVE;
224 --$CO_SLOT{$host}[0];
225 _slot_schedule $host;
226 });
227 } else {
228 # nobody wants the slot, maybe we can forget about it
229 delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
230 last;
231 }
232 }
233}
234
235# wait for a free slot on host, call callback
236sub _get_slot($$) {
237 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
238
239 _slot_schedule $_[0];
240}
241
242our $qr_nl = qr<\015?\012>;
243our $qr_nlnl = qr<\015?\012\015?\012>;
244
123sub http_request($$$;@) { 245sub http_request($$@) {
124 my $cb = pop; 246 my $cb = pop;
125 my ($method, $url, %arg) = @_; 247 my ($method, $url, %arg) = @_;
126 248
127 my %hdr; 249 my %hdr;
128 250
129 $method = uc $method; 251 $method = uc $method;
130 252
131 if (my $hdr = delete $arg{headers}) { 253 if (my $hdr = $arg{headers}) {
132 while (my ($k, $v) = each %$hdr) { 254 while (my ($k, $v) = each %$hdr) {
133 $hdr{lc $k} = $v; 255 $hdr{lc $k} = $v;
134 } 256 }
135 } 257 }
136 258
259 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
260
261 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url })
262 if $recurse < 0;
263
137 my $proxy = $arg{proxy} || $PROXY; 264 my $proxy = $arg{proxy} || $PROXY;
138 my $timeout = $arg{timeout} || $TIMEOUT; 265 my $timeout = $arg{timeout} || $TIMEOUT;
139 my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;
140 266
141 $hdr{"user-agent"} ||= $USERAGENT; 267 $hdr{"user-agent"} ||= $USERAGENT;
142 268
143 my ($host, $port, $path, $scheme); 269 my ($uscheme, $uauthority, $upath, $query, $fragment) =
270 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
271
272 $uscheme = lc $uscheme;
273
274 my $uport = $uscheme eq "http" ? 80
275 : $uscheme eq "https" ? 443
276 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url });
277
278 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
279
280 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
281 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url });
282
283 my $uhost = $1;
284 $uport = $2 if defined $2;
285
286 $uhost =~ s/^\[(.*)\]$/$1/;
287 $upath .= "?$query" if length $query;
288
289 $upath =~ s%^/?%/%;
290
291 # cookie processing
292 if (my $jar = $arg{cookie_jar}) {
293 %$jar = () if $jar->{version} != 1;
294
295 my @cookie;
296
297 while (my ($chost, $v) = each %$jar) {
298 if ($chost =~ /^\./) {
299 next unless $chost eq substr $uhost, -length $chost;
300 } elsif ($chost =~ /\./) {
301 next unless $chost eq $uhost;
302 } else {
303 next;
304 }
305
306 while (my ($cpath, $v) = each %$v) {
307 next unless $cpath eq substr $upath, 0, length $cpath;
308
309 while (my ($k, $v) = each %$v) {
310 next if $uscheme ne "https" && exists $v->{secure};
311 my $value = $v->{value};
312 $value =~ s/([\\"])/\\$1/g;
313 push @cookie, "$k=\"$value\"";
314 }
315 }
316 }
317
318 $hdr{cookie} = join "; ", @cookie
319 if @cookie;
320 }
321
322 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
144 323
145 if ($proxy) { 324 if ($proxy) {
146 ($host, $port, $scheme) = @$proxy; 325 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
147 $path = $url; 326
327 # don't support https requests over https-proxy transport,
328 # can't be done with tls as spec'ed, unless you double-encrypt.
329 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
148 } else { 330 } else {
149 ($scheme, my $authority, $path, my $query, my $fragment) = 331 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
150 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
151
152 $port = $scheme eq "http" ? 80
153 : $scheme eq "https" ? 443
154 : croak "$url: only http and https URLs supported";
155
156 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
157 or croak "$authority: unparsable URL";
158
159 $host = $1;
160 $port = $2 if defined $2;
161
162 $host =~ s/^\[(.*)\]$/$1/;
163 $path .= "?$query" if length $query;
164
165 $path = "/" unless $path;
166
167 $hdr{host} = $host = lc $host;
168 } 332 }
169 333
170 $scheme = lc $scheme; 334 $hdr{host} = $uhost;
171
172 my %state;
173
174 $state{body} = delete $arg{body};
175
176 $hdr{"content-length"} = length $state{body}; 335 $hdr{"content-length"} = length $arg{body};
177 336
337 my %state = (connect_guard => 1);
338
339 _get_slot $uhost, sub {
340 $state{slot_guard} = shift;
341
342 return unless $state{connect_guard};
343
178 $state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub { 344 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
179 $state{fh} = shift 345 $state{fh} = shift
180 or return $cb->(undef, { Status => 599, Reason => "$!" }); 346 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url });
347 pop; # free memory, save a tree
181 348
182 delete $state{connect_guard}; # reduce memory usage, save a tree 349 return unless delete $state{connect_guard};
183 350
184 # get handle 351 # get handle
185 $state{handle} = new AnyEvent::Handle 352 $state{handle} = new AnyEvent::Handle
186 fh => $state{fh}, 353 fh => $state{fh},
187 ($scheme eq "https" ? (tls => "connect") : ()); 354 timeout => $timeout;
188 355
189 # limit the number of persistent connections 356 # limit the number of persistent connections
357 # keepalive not yet supported
190 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 358 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
191 ++$KA_COUNT{$_[1]}; 359 ++$KA_COUNT{$_[1]};
192 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 360 $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
361 --$KA_COUNT{$_[1]}
362 };
193 $hdr{connection} = "keep-alive"; 363 $hdr{connection} = "keep-alive";
194 delete $hdr{connection}; # keep-alive not yet supported
195 } else { 364 } else {
196 delete $hdr{connection}; 365 delete $hdr{connection};
197 } 366 }
198 367
199 # (re-)configure handle 368 # (re-)configure handle
200 $state{handle}->timeout ($timeout);
201 $state{handle}->on_error (sub { 369 $state{handle}->on_error (sub {
370 my $errno = "$!";
202 %state = (); 371 %state = ();
203 $cb->(undef, { Status => 599, Reason => "$!" }); 372 $cb->(undef, { Status => 599, Reason => $errno, URL => $url });
204 }); 373 });
205 $state{handle}->on_eof (sub { 374 $state{handle}->on_eof (sub {
206 %state = (); 375 %state = ();
207 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" }); 376 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url });
208 });
209
210 # send request
211 $state{handle}->push_write (
212 "$method $path HTTP/1.0\015\012"
213 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
214 . "\015\012"
215 . (delete $state{body})
216 );
217
218 %hdr = (); # reduce memory usage, save a kitten
219
220 # status line
221 $state{handle}->push_read (line => qr/\015?\012/, sub {
222 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
223 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
224
225 my %hdr = ( # response headers
226 HTTPVersion => ",$1",
227 Status => ",$2",
228 Reason => ",$3",
229 ); 377 });
230 378
379 $state{handle}->starttls ("connect") if $rscheme eq "https";
380
381 # handle actual, non-tunneled, request
382 my $handle_actual_request = sub {
383 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
384
385 # send request
386 $state{handle}->push_write (
387 "$method $rpath HTTP/1.0\015\012"
388 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
389 . "\015\012"
390 . (delete $arg{body})
391 );
392
393 %hdr = (); # reduce memory usage, save a kitten
394
395 # status line
396 $state{handle}->push_read (line => $qr_nl, sub {
397 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
398 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
399
400 my %hdr = ( # response headers
401 HTTPVersion => ",$1",
402 Status => ",$2",
403 Reason => ",$3",
404 URL => ",$url"
405 );
406
231 # headers, could be optimized a bit 407 # headers, could be optimized a bit
232 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 408 $state{handle}->unshift_read (line => $qr_nlnl, sub {
233 for ("$_[1]\012") { 409 for ("$_[1]\012") {
410 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
411
234 # we support spaces in field names, as lotus domino 412 # we support spaces in field names, as lotus domino
235 # creates them. 413 # creates them (actually spaces around seperators
414 # are strictly allowed in http, they are a security issue).
236 $hdr{lc $1} .= ",$2" 415 $hdr{lc $1} .= ",$2"
237 while /\G 416 while /\G
238 ([^:\000-\037]+): 417 ([^:\000-\037]+):
239 [\011\040]* 418 [\011\040]*
240 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 419 ((?: [^\012]+ | \012[\011\040] )*)
241 \015?\012 420 \012
242 /gxc; 421 /gxc;
243 422
244 /\G$/ 423 /\G$/
245 or return $cb->(undef, { Status => 599, Reason => "garbled response headers" }); 424 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url }));
246 } 425 }
247 426
248 substr $_, 0, 1, "" 427 substr $_, 0, 1, ""
249 for values %hdr; 428 for values %hdr;
250 429
251 if ($method eq "HEAD") { 430 my $finish = sub {
252 %state = (); 431 $state{handle}->destroy;
253 $cb->(undef, \%hdr);
254 } else {
255 if (exists $hdr{"content-length"}) {
256 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
257 # could cache persistent connection now
258 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
259 # but we don't, due to misdesigns, this is annoyingly complex
260 };
261
262 %state = (); 432 %state = ();
433
434 # set-cookie processing
435 if ($arg{cookie_jar}) {
436 for ($hdr{"set-cookie"}) {
437 # parse NAME=VALUE
438 my @kv;
439
440 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
441 my $name = $1;
442 my $value = $3;
443
444 unless ($value) {
445 $value = $2;
446 $value =~ s/\\(.)/$1/gs;
447 }
448
449 push @kv, $name => $value;
450
451 last unless /\G\s*;/gc;
452 }
453
454 last unless @kv;
455
456 my $name = shift @kv;
457 my %kv = (value => shift @kv, @kv);
458
459 my $cdom;
460 my $cpath = (delete $kv{path}) || "/";
461
462 if (exists $kv{domain}) {
463 $cdom = delete $kv{domain};
464
465 $cdom =~ s/^\.?/./; # make sure it starts with a "."
466
467 next if $cdom =~ /\.$/;
468
469 # this is not rfc-like and not netscape-like. go figure.
470 my $ndots = $cdom =~ y/.//;
471 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
472 } else {
473 $cdom = $uhost;
474 }
475
476 # store it
477 $arg{cookie_jar}{version} = 1;
478 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
479
480 redo if /\G\s*,/gc;
481 }
482 }
483
484 # microsoft and other shitheads don't give a shit for following standards,
485 # try to support some common forms of broken Location headers.
486 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
487 $_[1]{location} =~ s/^\.\/+//;
488
489 my $url = "$rscheme://$uhost:$uport";
490
491 unless ($_[1]{location} =~ s/^\///) {
492 $url .= $upath;
493 $url =~ s/\/[^\/]*$//;
494 }
495
496 $_[1]{location} = "$url/$_[1]{location}";
497 }
498
499 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
500 # apparently, mozilla et al. just change POST to GET here
501 # more research is needed before we do the same
502 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
503 } elsif ($_[1]{Status} == 303 && $recurse) {
504 # even http/1.1 is unclear on how to mutate the method
505 $method = "GET" unless $method eq "HEAD";
506 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
507 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
508 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
509 } else {
263 $cb->($_[1], \%hdr); 510 $cb->($_[0], $_[1]);
511 }
264 }); 512 };
513
514 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") {
515 $finish->(undef, \%hdr);
516 } else {
517 if (exists $hdr{"content-length"}) {
518 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
519 # could cache persistent connection now
520 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
521 # but we don't, due to misdesigns, this is annoyingly complex
522 };
523
524 $finish->($_[1], \%hdr);
525 });
526 } else {
527 # too bad, need to read until we get an error or EOF,
528 # no way to detect winged data.
529 $_[0]->on_error (sub {
530 # delete ought to be more efficient, as we would have to make
531 # a copy otherwise as $_[0] gets destroyed.
532 $finish->(delete $_[0]{rbuf}, \%hdr);
533 });
534 $_[0]->on_eof (undef);
535 $_[0]->on_read (sub { });
536 }
537 }
538 });
539 });
540 };
541
542 # now handle proxy-CONNECT method
543 if ($proxy && $uscheme eq "https") {
544 # oh dear, we have to wrap it into a connect request
545
546 # maybe re-use $uauthority with patched port?
547 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
548 $state{handle}->push_read (line => $qr_nlnl, sub {
549 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
550 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid proxy connect response ($_[1])", URL => $url }));
551
552 if ($2 == 200) {
553 $rpath = $upath;
554 &$handle_actual_request;
265 } else { 555 } else {
266 # too bad, need to read until we get an error or EOF,
267 # no way to detect winged data.
268 $_[0]->on_error (sub {
269 %state = (); 556 %state = ();
270 $cb->($_[0]{rbuf}, \%hdr); 557 $cb->(undef, { Status => $2, Reason => $3, URL => $url });
271 });
272 $_[0]->on_eof (undef);
273 $_[0]->on_read (sub { });
274 } 558 }
275 } 559 });
560 } else {
561 &$handle_actual_request;
276 }); 562 }
563
564 }, sub {
565 $timeout
277 }); 566 };
278 }, sub {
279 $timeout
280 }; 567 };
281 568
282 defined wantarray && AnyEvent::Util::guard { %state = () } 569 defined wantarray && AnyEvent::Util::guard { %state = () }
283} 570}
284 571
285sub http_get($$;@) { 572sub http_get($@) {
286 unshift @_, "GET"; 573 unshift @_, "GET";
287 &http_request 574 &http_request
288} 575}
289 576
290sub http_head($$;@) { 577sub http_head($@) {
291 unshift @_, "HEAD"; 578 unshift @_, "HEAD";
292 &http_request 579 &http_request
293} 580}
294 581
295sub http_post($$$;@) { 582sub http_post($$@) {
583 my $url = shift;
296 unshift @_, "POST", "body"; 584 unshift @_, "POST", $url, "body";
297 &http_request 585 &http_request
298} 586}
299 587
588=back
589
300=head2 GLOBAL FUNCTIONS AND VARIABLES 590=head2 GLOBAL FUNCTIONS AND VARIABLES
301 591
302=over 4 592=over 4
303 593
304=item AnyEvent::HTTP::set_proxy "proxy-url" 594=item AnyEvent::HTTP::set_proxy "proxy-url"
… …
324=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT 614=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
325 615
326The maximum time to cache a persistent connection, in seconds (default: 2). 616The maximum time to cache a persistent connection, in seconds (default: 2).
327 617
328Not implemented currently. 618Not implemented currently.
619
620=item $AnyEvent::HTTP::ACTIVE
621
622The number of active connections. This is not the number of currently
623running requests, but the number of currently open and non-idle TCP
624connections. This number of can be useful for load-leveling.
329 625
330=back 626=back
331 627
332=cut 628=cut
333 629
… …
342 638
343L<AnyEvent>. 639L<AnyEvent>.
344 640
345=head1 AUTHOR 641=head1 AUTHOR
346 642
347 Marc Lehmann <schmorp@schmorp.de> 643 Marc Lehmann <schmorp@schmorp.de>
348 http://home.schmorp.de/ 644 http://home.schmorp.de/
645
646With many thanks to Дмитрий Шалашов, who provided countless
647testcases and bugreports.
349 648
350=cut 649=cut
351 650
3521 6511
353 652

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