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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.3 by root, Wed Jun 4 11:58:36 2008 UTC vs.
Revision 1.29 by root, Wed Oct 22 23:28:11 2008 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 = '1.05';
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
78=item http_head $url, key => value..., $cb->($data, $headers)
79
80Executes an HTTP-HEAD request. See the http_request function for details
81on additional parameters and the return value.
82
57=item http_get $url, $body, key => value..., $cb->($data, $headers) 83=item http_post $url, $body, key => value..., $cb->($data, $headers)
58 84
59Executes an HTTP-POST request with a requets body of C<$bod>. See the 85Executes an HTTP-POST request with a request body of C<$body>. See the
60http_request function for details on additional parameters. 86http_request function for details on additional parameters and the return
87value.
61 88
62=item http_request $method => $url, key => value..., $cb->($data, $headers) 89=item http_request $method => $url, key => value..., $cb->($data, $headers)
63 90
64Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL 91Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
65must be an absolute http or https URL. 92must be an absolute http or https URL.
93
94When called in void context, nothing is returned. In other contexts,
95C<http_request> returns a "cancellation guard" - you have to keep the
96object at least alive until the callback get called. If the object gets
97destroyed before the callbakc is called, the request will be cancelled.
66 98
67The callback will be called with the response data as first argument 99The callback will be called with the response data as first argument
68(or C<undef> if it wasn't available due to errors), and a hash-ref with 100(or C<undef> if it wasn't available due to errors), and a hash-ref with
69response headers as second argument. 101response headers as second argument.
70 102
71All the headers in that has are lowercased. In addition to the response 103All the headers in that hash are lowercased. In addition to the response
72headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and 104headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
73C<Reason> contain the three parts of the HTTP Status-Line of the same 105contain the three parts of the HTTP Status-Line of the same name. The
74name. 106pseudo-header C<URL> contains the original URL (which can differ from the
107requested URL when following redirects).
108
109If the server sends a header multiple lines, then their contents will be
110joined together with C<\x00>.
75 111
76If an internal error occurs, such as not being able to resolve a hostname, 112If an internal error occurs, such as not being able to resolve a hostname,
77then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> 113then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>
78and the C<Reason> pseudo-header will contain an error message. 114and the C<Reason> pseudo-header will contain an error message.
79 115
116A typical callback might look like this:
117
118 sub {
119 my ($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
80Additional parameters are key-value pairs, and are fully optional. They 128Additional parameters are key-value pairs, and are fully optional. They
81include: 129include:
82 130
83=over 4 131=over 4
84 132
… …
87Whether to recurse requests or not, e.g. on redirects, authentication 135Whether to recurse requests or not, e.g. on redirects, authentication
88retries and so on, and how often to do so. 136retries and so on, and how often to do so.
89 137
90=item headers => hashref 138=item headers => hashref
91 139
92The 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:>.
93 143
94=item timeout => $seconds 144=item timeout => $seconds
95 145
96The 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
97the 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.
… …
107=item body => $string 157=item body => $string
108 158
109The 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
110this module might offer more options). 160this module might offer more options).
111 161
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
112=back 178=back
113 179
114=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 $request;
115 209
116=cut 210=cut
117 211
212sub _slot_schedule;
213sub _slot_schedule($) {
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($$) {
237 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
238
239 _slot_schedule $_[0];
240}
241
118sub http_request($$$;@) { 242sub http_request($$@) {
119 my $cb = pop; 243 my $cb = pop;
120 my ($method, $url, %arg) = @_; 244 my ($method, $url, %arg) = @_;
121 245
122 my %hdr; 246 my %hdr;
123 247
124 $method = uc $method; 248 $method = uc $method;
125 249
126 if (my $hdr = delete $arg{headers}) { 250 if (my $hdr = $arg{headers}) {
127 while (my ($k, $v) = each %$hdr) { 251 while (my ($k, $v) = each %$hdr) {
128 $hdr{lc $k} = $v; 252 $hdr{lc $k} = $v;
129 } 253 }
130 } 254 }
131 255
256 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
257
258 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url })
259 if $recurse < 0;
260
132 my $proxy = $arg{proxy} || $PROXY; 261 my $proxy = $arg{proxy} || $PROXY;
133 my $timeout = $arg{timeout} || $TIMEOUT; 262 my $timeout = $arg{timeout} || $TIMEOUT;
134 my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;
135 263
136 $hdr{"user-agent"} ||= $USERAGENT; 264 $hdr{"user-agent"} ||= $USERAGENT;
137 265
138 my ($host, $port, $path, $scheme); 266 my ($scheme, $authority, $upath, $query, $fragment) =
267 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
268
269 $scheme = lc $scheme;
270
271 my $uport = $scheme eq "http" ? 80
272 : $scheme eq "https" ? 443
273 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url });
274
275 $hdr{referer} ||= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic
276
277 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
278 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url });
279
280 my $uhost = $1;
281 $uport = $2 if defined $2;
282
283 $uhost =~ s/^\[(.*)\]$/$1/;
284 $upath .= "?$query" if length $query;
285
286 $upath =~ s%^/?%/%;
287
288 # cookie processing
289 if (my $jar = $arg{cookie_jar}) {
290 %$jar = () if $jar->{version} < 1;
291
292 my @cookie;
293
294 while (my ($chost, $v) = each %$jar) {
295 next unless $chost eq substr $uhost, -length $chost;
296 next unless $chost =~ /^\./;
297
298 while (my ($cpath, $v) = each %$v) {
299 next unless $cpath eq substr $upath, 0, length $cpath;
300
301 while (my ($k, $v) = each %$v) {
302 next if $scheme ne "https" && exists $v->{secure};
303 push @cookie, "$k=$v->{value}";
304 }
305 }
306 }
307
308 $hdr{cookie} = join "; ", @cookie
309 if @cookie;
310 }
311
312 my ($rhost, $rport, $rpath); # request host, port, path
139 313
140 if ($proxy) { 314 if ($proxy) {
141 ($host, $port, $scheme) = @$proxy; 315 ($rhost, $rport, $scheme) = @$proxy;
142 $path = $url; 316 $rpath = $url;
143 } else { 317 } else {
144 ($scheme, my $authority, $path, my $query, my $fragment) = 318 ($rhost, $rport, $rpath) = ($uhost, $uport, $upath);
145 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
146
147 $port = $scheme eq "http" ? 80
148 : $scheme eq "https" ? 443
149 : croak "$url: only http and https URLs supported";
150
151 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
152 or croak "$authority: unparsable URL";
153
154 $host = $1;
155 $port = $2 if defined $2;
156
157 $host =~ s/^\[(.*)\]$/$1/;
158 $path .= "?$query" if length $query;
159
160 $path = "/" unless $path;
161
162 $hdr{host} = $host = lc $host; 319 $hdr{host} = $uhost;
163 } 320 }
164 321
165 $scheme = lc $scheme;
166
167 my %state;
168
169 $state{body} = delete $arg{body};
170
171 $hdr{"content-length"} = length $state{body}; 322 $hdr{"content-length"} = length $arg{body};
172 323
324 my %state = (connect_guard => 1);
325
326 _get_slot $uhost, sub {
327 $state{slot_guard} = shift;
328
329 return unless $state{connect_guard};
330
173 $state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub { 331 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
174 $state{fh} = shift 332 $state{fh} = shift
175 or return $cb->(undef, { Status => 599, Reason => "$!" }); 333 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url });
176 334
177 delete $state{connect_guard}; # reduce memory usage, save a tree 335 delete $state{connect_guard}; # reduce memory usage, save a tree
178 336
179 # get handle 337 # get handle
180 $state{handle} = new AnyEvent::Handle 338 $state{handle} = new AnyEvent::Handle
181 fh => $state{fh}, 339 fh => $state{fh},
182 ($scheme eq "https" ? (tls => "connect") : ()); 340 ($scheme eq "https" ? (tls => "connect") : ());
183 341
184 # limit the number of persistent connections 342 # limit the number of persistent connections
185 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 343 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
186 ++$KA_COUNT{$_[1]}; 344 ++$KA_COUNT{$_[1]};
187 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 345 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };
188 $hdr{connection} = "keep-alive"; 346 $hdr{connection} = "keep-alive";
189 delete $hdr{connection}; # keep-alive not yet supported 347 delete $hdr{connection}; # keep-alive not yet supported
190 } else { 348 } else {
191 delete $hdr{connection}; 349 delete $hdr{connection};
192 } 350 }
193 351
194 # (re-)configure handle 352 # (re-)configure handle
195 $state{handle}->timeout ($timeout); 353 $state{handle}->timeout ($timeout);
196 $state{handle}->on_error (sub { 354 $state{handle}->on_error (sub {
355 my $errno = "$!";
197 %state = (); 356 %state = ();
198 $cb->(undef, { Status => 599, Reason => "$!" }); 357 $cb->(undef, { Status => 599, Reason => $errno, URL => $url });
199 }); 358 });
200 $state{handle}->on_eof (sub { 359 $state{handle}->on_eof (sub {
201 %state = (); 360 %state = ();
202 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" }); 361 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url });
203 }); 362 });
204 363
205 # send request 364 # send request
206 $state{handle}->push_write ( 365 $state{handle}->push_write (
207 "$method $path HTTP/1.0\015\012" 366 "$method $rpath HTTP/1.0\015\012"
208 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) 367 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
209 . "\015\012" 368 . "\015\012"
210 . (delete $state{body}) 369 . (delete $arg{body})
211 );
212
213 %hdr = (); # reduce memory usage, save a kitten
214
215 # status line
216 $state{handle}->push_read (line => qr/\015?\012/, sub {
217 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
218 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
219
220 my %hdr = ( # response headers
221 HTTPVersion => ",$1",
222 Status => ",$2",
223 Reason => ",$3",
224 ); 370 );
225 371
372 %hdr = (); # reduce memory usage, save a kitten
373
374 # status line
375 $state{handle}->push_read (line => qr/\015?\012/, sub {
376 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
377 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
378
379 my %hdr = ( # response headers
380 HTTPVersion => "\x00$1",
381 Status => "\x00$2",
382 Reason => "\x00$3",
383 URL => "\x00$url"
384 );
385
226 # headers, could be optimized a bit 386 # headers, could be optimized a bit
227 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 387 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
228 for ("$_[1]\012") { 388 for ("$_[1]\012") {
229 # we support spaces in field names, as lotus domino 389 # we support spaces in field names, as lotus domino
230 # creates them. 390 # creates them.
231 $hdr{lc $1} .= ",$2" 391 $hdr{lc $1} .= "\x00$2"
232 while /\G 392 while /\G
233 ([^:\000-\037]+): 393 ([^:\000-\037]+):
234 [\011\040]* 394 [\011\040]*
235 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 395 ((?: [^\015\012]+ | \015?\012[\011\040] )*)
236 \015?\012 396 \015?\012
237 /gxc; 397 /gxc;
238 398
239 /\G$/ 399 /\G$/
240 or return $cb->(undef, { Status => 599, Reason => "garbled response headers" }); 400 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url }));
241 } 401 }
242 402
243 substr $_, 0, 1, "" 403 substr $_, 0, 1, ""
244 for values %hdr; 404 for values %hdr;
245 405
246 if ($method ne "HEAD") { 406 my $finish = sub {
247 if (exists $hdr{"content-length"}) { 407 %state = ();
248 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 408
249 # could cache persistent connection now 409 # set-cookie processing
250 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 410 if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
251 # but we don't, due to misdesigns, this is annoyingly complex 411 for (split /\x00/, $hdr{"set-cookie"}) {
412 my ($cookie, @arg) = split /;\s*/;
413 my ($name, $value) = split /=/, $cookie, 2;
414 my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
415
416 my $cdom = (delete $kv{domain}) || $uhost;
417 my $cpath = (delete $kv{path}) || "/";
418
419 $cdom =~ s/^\.?/./; # make sure it starts with a "."
420
421 next if $cdom =~ /\.$/;
422
423 # this is not rfc-like and not netscape-like. go figure.
424 my $ndots = $cdom =~ y/.//;
425 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
426
427 # store it
428 $arg{cookie_jar}{version} = 1;
429 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
252 }; 430 }
253
254 %state = ();
255 $cb->($_[1], \%hdr);
256 }); 431 }
432
433 # microsoft and other shitheads don't give a shit for following standards,
434 # try to support some common forms of broken Location headers.
435 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
436 $_[1]{location} =~ s/^\.\/+//;
437
438 my $url = "$scheme://$uhost:$uport";
439
440 unless ($_[1]{location} =~ s/^\///) {
441 $url .= $upath;
442 $url =~ s/\/[^\/]*$//;
443 }
444
445 $_[1]{location} = "$url/$_[1]{location}";
446 }
447
448 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
449 # apparently, mozilla et al. just change POST to GET here
450 # more research is needed before we do the same
451 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
452 } elsif ($_[1]{Status} == 303 && $recurse) {
453 # even http/1.1 is unlear on how to mutate the method
454 $method = "GET" unless $method eq "HEAD";
455 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
456 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
457 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
458 } else {
459 $cb->($_[0], $_[1]);
460 }
461 };
462
463 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") {
464 $finish->(undef, \%hdr);
257 } else { 465 } else {
466 if (exists $hdr{"content-length"}) {
467 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
468 # could cache persistent connection now
469 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
470 # but we don't, due to misdesigns, this is annoyingly complex
471 };
472
473 $finish->($_[1], \%hdr);
474 });
475 } else {
258 # too bad, need to read until we get an error or EOF, 476 # too bad, need to read until we get an error or EOF,
259 # no way to detect winged data. 477 # no way to detect winged data.
260 $_[0]->on_error (sub { 478 $_[0]->on_error (sub {
261 %state = ();
262 $cb->($_[0]{rbuf}, \%hdr); 479 $finish->($_[0]{rbuf}, \%hdr);
263 }); 480 });
264 $_[0]->on_eof (undef); 481 $_[0]->on_eof (undef);
265 $_[0]->on_read (sub { }); 482 $_[0]->on_read (sub { });
483 }
266 } 484 }
267 } 485 });
268 }); 486 });
487 }, sub {
488 $timeout
269 }); 489 };
270 }, sub {
271 $timeout
272 }; 490 };
273 491
274 defined wantarray && AnyEvent::Util::guard { %state = () } 492 defined wantarray && AnyEvent::Util::guard { %state = () }
275} 493}
276 494
277sub http_get($$;@) { 495sub http_get($@) {
278 unshift @_, "GET"; 496 unshift @_, "GET";
279 &http_request 497 &http_request
280} 498}
281 499
282sub http_post($$$;@) { 500sub http_head($@) {
283 unshift @_, "POST", "body"; 501 unshift @_, "HEAD";
284 &http_request 502 &http_request
285} 503}
504
505sub http_post($$@) {
506 my $url = shift;
507 unshift @_, "POST", $url, "body";
508 &http_request
509}
510
511=back
286 512
287=head2 GLOBAL FUNCTIONS AND VARIABLES 513=head2 GLOBAL FUNCTIONS AND VARIABLES
288 514
289=over 4 515=over 4
290 516
… …
312 538
313The maximum time to cache a persistent connection, in seconds (default: 2). 539The maximum time to cache a persistent connection, in seconds (default: 2).
314 540
315Not implemented currently. 541Not implemented currently.
316 542
543=item $AnyEvent::HTTP::ACTIVE
544
545The number of active connections. This is not the number of currently
546running requests, but the number of currently open and non-idle TCP
547connections. This number of can be useful for load-leveling.
548
317=back 549=back
318 550
319=cut 551=cut
320 552
321sub set_proxy($) { 553sub set_proxy($) {
… …
329 561
330L<AnyEvent>. 562L<AnyEvent>.
331 563
332=head1 AUTHOR 564=head1 AUTHOR
333 565
334 Marc Lehmann <schmorp@schmorp.de> 566 Marc Lehmann <schmorp@schmorp.de>
335 http://home.schmorp.de/ 567 http://home.schmorp.de/
336 568
337=cut 569=cut
338 570
3391 5711
340 572

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