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Revision 1.2 by root, Wed Jun 4 11:37:41 2008 UTC vs.
Revision 1.16 by root, Fri Jun 6 12:57:48 2008 UTC

… …
8 8
9=head1 DESCRIPTION 9=head1 DESCRIPTION
10 10
11This module is an L<AnyEvent> user, you need to make sure that you use and 11This module is an L<AnyEvent> user, you need to make sure that you use and
12run a supported event loop. 12run a supported event loop.
13
14This module implements a simple, stateless and non-blocking HTTP
15client. It supports GET, POST and other request methods, cookies and more,
16all on a very low level. It can follow redirects supports proxies and
17automatically limits the number of connections to the values specified in
18the RFC.
19
20It should generally be a "good client" that is enough for most HTTP
21tasks. Simple tasks should be simple, but complex tasks should still be
22possible as the user retains control over request and response headers.
23
24The caller is responsible for authentication management, cookies (if
25the simplistic implementation in this module doesn't suffice), referer
26and other high-level protocol details for which this module offers only
27limited support.
13 28
14=head2 METHODS 29=head2 METHODS
15 30
16=over 4 31=over 4
17 32
… …
29use AnyEvent::Socket (); 44use AnyEvent::Socket ();
30use AnyEvent::Handle (); 45use AnyEvent::Handle ();
31 46
32use base Exporter::; 47use base Exporter::;
33 48
34our $VERSION = '1.0'; 49our $VERSION = '1.01';
35 50
36our @EXPORT = qw(http_get http_request); 51our @EXPORT = qw(http_get http_request);
37 52
38our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; 53our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
39our $MAX_REDIRECTS = 10; 54our $MAX_RECURSE = 10;
40our $MAX_PERSISTENT = 8; 55our $MAX_PERSISTENT = 8;
41our $PERSISTENT_TIMEOUT = 2; 56our $PERSISTENT_TIMEOUT = 2;
42our $TIMEOUT = 300; 57our $TIMEOUT = 300;
43 58
44# changing these is evil 59# changing these is evil
45our $MAX_PERSISTENT_PER_HOST = 2; 60our $MAX_PERSISTENT_PER_HOST = 2;
46our $MAX_PER_HOST = 4; # not respected yet :( 61our $MAX_PER_HOST = 4;
47 62
48our $PROXY; 63our $PROXY;
64our $ACTIVE = 0;
49 65
50my %KA_COUNT; # number of open keep-alive connections per host 66my %KA_COUNT; # number of open keep-alive connections per host
67my %CO_SLOT; # number of open connections, and wait queue, per host
51 68
52=item http_get $url, key => value..., $cb->($data, $headers) 69=item http_get $url, key => value..., $cb->($data, $headers)
53 70
54Executes an HTTP-GET request. See the http_request function for details on 71Executes an HTTP-GET request. See the http_request function for details on
55additional parameters. 72additional parameters.
73
74=item http_head $url, key => value..., $cb->($data, $headers)
75
76Executes an HTTP-HEAD request. See the http_request function for details on
77additional parameters.
78
79=item http_post $url, $body, key => value..., $cb->($data, $headers)
80
81Executes an HTTP-POST request with a request body of C<$bod>. See the
82http_request function for details on additional parameters.
56 83
57=item http_request $method => $url, key => value..., $cb->($data, $headers) 84=item http_request $method => $url, key => value..., $cb->($data, $headers)
58 85
59Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL 86Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
60must be an absolute http or https URL. 87must be an absolute http or https URL.
61 88
62The callback will be called with the response data as first argument 89The callback will be called with the response data as first argument
63(or C<undef> if it wasn't available due to errors), and a hash-ref with 90(or C<undef> if it wasn't available due to errors), and a hash-ref with
64response headers as second argument. 91response headers as second argument.
65 92
66All the headers in that has are lowercased. In addition to the response 93All the headers in that hash are lowercased. In addition to the response
67headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and 94headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and
68C<Reason> contain the three parts of the HTTP Status-Line of the same 95C<Reason> contain the three parts of the HTTP Status-Line of the same
69name. 96name. If the server sends a header multiple lines, then their contents
97will be joined together with C<\x00>.
70 98
71If an internal error occurs, such as not being able to resolve a hostname, 99If an internal error occurs, such as not being able to resolve a hostname,
72then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> 100then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>
73and the C<Reason> pseudo-header will contain an error message. 101and the C<Reason> pseudo-header will contain an error message.
74 102
103A typical callback might look like this:
104
105 sub {
106 my ($body, $hdr) = @_;
107
108 if ($hdr->{Status} =~ /^2/) {
109 ... everything should be ok
110 } else {
111 print "error, $hdr->{Status} $hdr->{Reason}\n";
112 }
113 }
114
75Additional parameters are key-value pairs, and are fully optional. They 115Additional parameters are key-value pairs, and are fully optional. They
76include: 116include:
77 117
78=over 4 118=over 4
79 119
80=item recurse => $boolean (default: true) 120=item recurse => $count (default: $MAX_RECURSE)
81 121
82Whether to recurse requests or not, e.g. on redirects, authentication 122Whether to recurse requests or not, e.g. on redirects, authentication
83retries and so on. 123retries and so on, and how often to do so.
84 124
85=item headers => hashref 125=item headers => hashref
86 126
87The request headers to use. 127The request headers to use. Currently, C<http_request> may provide its
128own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
129and will provide defaults for C<User-Agent:> and C<Referer:>.
88 130
89=item timeout => $seconds 131=item timeout => $seconds
90 132
91The time-out to use for various stages - each connect attempt will reset 133The time-out to use for various stages - each connect attempt will reset
92the timeout, as will read or write activity. Default timeout is 5 minutes. 134the timeout, as will read or write activity. Default timeout is 5 minutes.
… …
97default proxy (as specified by C<$ENV{http_proxy}>) is used. 139default proxy (as specified by C<$ENV{http_proxy}>) is used.
98 140
99C<$scheme> must be either missing or C<http> for HTTP, or C<https> for 141C<$scheme> must be either missing or C<http> for HTTP, or C<https> for
100HTTPS. 142HTTPS.
101 143
144=item body => $string
145
146The request body, usually empty. Will be-sent as-is (future versions of
147this module might offer more options).
148
149=item cookie_jar => $hash_ref
150
151Passing this parameter enables (simplified) cookie-processing, loosely
152based on the original netscape specification.
153
154The C<$hash_ref> must be an (initially empty) hash reference which will
155get updated automatically. It is possible to save the cookie_jar to
156persistent storage with something like JSON or Storable, but this is not
157recommended, as expire times are currently being ignored.
158
159Note that this cookie implementation is not of very high quality, nor
160meant to be complete. If you want complete cookie management you have to
161do that on your own. C<cookie_jar> is meant as a quick fix to get some
162cookie-using sites working. Cookies are a privacy disaster, do not use
163them unless required to.
164
102=back 165=back
103 166
104=back 167Example: make a simple HTTP GET request for http://www.nethype.de/
168
169 http_request GET => "http://www.nethype.de/", sub {
170 my ($body, $hdr) = @_;
171 print "$body\n";
172 };
173
174Example: make a HTTP HEAD request on https://www.google.com/, use a
175timeout of 30 seconds.
176
177 http_request
178 GET => "https://www.google.com",
179 timeout => 30,
180 sub {
181 my ($body, $hdr) = @_;
182 use Data::Dumper;
183 print Dumper $hdr;
184 }
185 ;
105 186
106=cut 187=cut
107 188
189sub _slot_schedule;
190sub _slot_schedule($) {
191 my $host = shift;
192
193 while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
194 if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
195 # somebody wants that slot
196 ++$CO_SLOT{$host}[0];
197 ++$ACTIVE;
198
199 $cb->(AnyEvent::Util::guard {
200 --$ACTIVE;
201 --$CO_SLOT{$host}[0];
202 _slot_schedule $host;
203 });
204 } else {
205 # nobody wants the slot, maybe we can forget about it
206 delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
207 last;
208 }
209 }
210}
211
212# wait for a free slot on host, call callback
213sub _get_slot($$) {
214 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
215
216 _slot_schedule $_[0];
217}
218
108sub http_request($$$;@) { 219sub http_request($$@) {
109 my $cb = pop; 220 my $cb = pop;
110 my ($method, $url, %arg) = @_; 221 my ($method, $url, %arg) = @_;
111 222
112 my %hdr; 223 my %hdr;
113 224
225 $method = uc $method;
226
114 if (my $hdr = delete $arg{headers}) { 227 if (my $hdr = $arg{headers}) {
115 while (my ($k, $v) = each %$hdr) { 228 while (my ($k, $v) = each %$hdr) {
116 $hdr{lc $k} = $v; 229 $hdr{lc $k} = $v;
117 } 230 }
118 } 231 }
119 232
233 my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;
234
235 return $cb->(undef, { Status => 599, Reason => "recursion limit reached" })
236 if $recurse < 0;
237
120 my $proxy = $arg{proxy} || $PROXY; 238 my $proxy = $arg{proxy} || $PROXY;
121 my $timeout = $arg{timeout} || $TIMEOUT; 239 my $timeout = $arg{timeout} || $TIMEOUT;
122 240
123 $hdr{"user-agent"} ||= $USERAGENT; 241 $hdr{"user-agent"} ||= $USERAGENT;
124 242
125 my ($host, $port, $path, $scheme); 243 my ($scheme, $authority, $upath, $query, $fragment) =
244 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
245
246 $scheme = lc $scheme;
247
248 my $uport = $scheme eq "http" ? 80
249 : $scheme eq "https" ? 443
250 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported" });
251
252 $hdr{referer} ||= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic
253
254 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
255 or return $cb->(undef, { Status => 599, Reason => "unparsable URL" });
256
257 my $uhost = $1;
258 $uport = $2 if defined $2;
259
260 $uhost =~ s/^\[(.*)\]$/$1/;
261 $upath .= "?$query" if length $query;
262
263 $upath =~ s%^/?%/%;
264
265 # cookie processing
266 if (my $jar = $arg{cookie_jar}) {
267 %$jar = () if $jar->{version} < 1;
268
269 my @cookie;
270
271 while (my ($chost, $v) = each %$jar) {
272 next unless $chost eq substr $uhost, -length $chost;
273 next unless $chost =~ /^\./;
274
275 while (my ($cpath, $v) = each %$v) {
276 next unless $cpath eq substr $upath, 0, length $cpath;
277
278 while (my ($k, $v) = each %$v) {
279 next if $scheme ne "https" && exists $v->{secure};
280 push @cookie, "$k=$v->{value}";
281 }
282 }
283 }
284
285 $hdr{cookie} = join "; ", @cookie
286 if @cookie;
287 }
288
289 my ($rhost, $rport, $rpath); # request host, port, path
126 290
127 if ($proxy) { 291 if ($proxy) {
128 ($host, $port, $scheme) = @$proxy; 292 ($rhost, $rport, $scheme) = @$proxy;
129 $path = $url; 293 $rpath = $url;
130 } else { 294 } else {
131 ($scheme, my $authority, $path, my $query, my $fragment) = 295 ($rhost, $rport, $rpath) = ($uhost, $uport, $upath);
132 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
133
134 $port = $scheme eq "http" ? 80
135 : $scheme eq "https" ? 443
136 : croak "$url: only http and https URLs supported";
137
138 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
139 or croak "$authority: unparsable URL";
140
141 $host = $1;
142 $port = $2 if defined $2;
143
144 $host =~ s/^\[(.*)\]$/$1/;
145 $path .= "?$query" if length $query;
146
147 $path = "/" unless $path;
148
149 $hdr{host} = $host = lc $host; 296 $hdr{host} = $uhost;
150 } 297 }
151 298
152 $scheme = lc $scheme;
153
154 my %state;
155
156 my $body = "";
157 $state{body} = $body;
158
159 $hdr{"content-length"} = length $body; 299 $hdr{"content-length"} = length $arg{body};
160 300
301 my %state = (connect_guard => 1);
302
303 _get_slot $uhost, sub {
304 $state{slot_guard} = shift;
305
306 return unless $state{connect_guard};
307
161 $state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub { 308 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
162 $state{fh} = shift 309 $state{fh} = shift
163 or return $cb->(undef, { Status => 599, Reason => "$!" }); 310 or return $cb->(undef, { Status => 599, Reason => "$!" });
164 311
165 delete $state{connect_guard}; # reduce memory usage, save a tree 312 delete $state{connect_guard}; # reduce memory usage, save a tree
166 313
167 # get handle 314 # get handle
168 $state{handle} = new AnyEvent::Handle 315 $state{handle} = new AnyEvent::Handle
169 fh => $state{fh}, 316 fh => $state{fh},
170 ($scheme eq "https" ? (tls => "connect") : ()); 317 ($scheme eq "https" ? (tls => "connect") : ());
171 318
172 # limit the number of persistent connections 319 # limit the number of persistent connections
173 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 320 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
174 ++$KA_COUNT{$_[1]}; 321 ++$KA_COUNT{$_[1]};
175 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 322 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };
176 $hdr{connection} = "keep-alive"; 323 $hdr{connection} = "keep-alive";
177 delete $hdr{connection}; # keep-alive not yet supported 324 delete $hdr{connection}; # keep-alive not yet supported
178 } else { 325 } else {
179 delete $hdr{connection}; 326 delete $hdr{connection};
180 } 327 }
181 328
182 # (re-)configure handle 329 # (re-)configure handle
183 $state{handle}->timeout ($timeout); 330 $state{handle}->timeout ($timeout);
184 $state{handle}->on_error (sub { 331 $state{handle}->on_error (sub {
332 my $errno = "$!";
185 %state = (); 333 %state = ();
186 $cb->(undef, { Status => 599, Reason => "$!" }); 334 $cb->(undef, { Status => 599, Reason => $errno });
187 }); 335 });
188 $state{handle}->on_eof (sub { 336 $state{handle}->on_eof (sub {
189 %state = (); 337 %state = ();
190 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" }); 338 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
191 }); 339 });
192 340
193 # send request 341 # send request
194 $state{handle}->push_write ( 342 $state{handle}->push_write (
195 "\U$method\E $path HTTP/1.0\015\012" 343 "$method $rpath HTTP/1.0\015\012"
196 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) 344 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
197 . "\015\012" 345 . "\015\012"
198 . (delete $state{body}) 346 . (delete $arg{body})
199 );
200
201 %hdr = (); # reduce memory usage, save a kitten
202
203 # status line
204 $state{handle}->push_read (line => qr/\015?\012/, sub {
205 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
206 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
207
208 my %hdr = ( # response headers
209 HTTPVersion => ",$1",
210 Status => ",$2",
211 Reason => ",$3",
212 ); 347 );
213 348
349 %hdr = (); # reduce memory usage, save a kitten
350
351 # status line
352 $state{handle}->push_read (line => qr/\015?\012/, sub {
353 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
354 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
355
356 my %hdr = ( # response headers
357 HTTPVersion => "\x00$1",
358 Status => "\x00$2",
359 Reason => "\x00$3",
360 );
361
214 # headers, could be optimized a bit 362 # headers, could be optimized a bit
215 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 363 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
216 for ("$_[1]\012") { 364 for ("$_[1]\012") {
217 # we support spaces in field names, as lotus domino 365 # we support spaces in field names, as lotus domino
218 # creates them. 366 # creates them.
219 $hdr{lc $1} .= ",$2" 367 $hdr{lc $1} .= "\x00$2"
220 while /\G 368 while /\G
221 ([^:\000-\037]+): 369 ([^:\000-\037]+):
222 [\011\040]* 370 [\011\040]*
223 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 371 ((?: [^\015\012]+ | \015?\012[\011\040] )*)
224 \015?\012 372 \015?\012
225 /gxc; 373 /gxc;
226 374
227 /\G$/ 375 /\G$/
228 or return $cb->(undef, { Status => 599, Reason => "garbled response headers" }); 376 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers" }));
229 } 377 }
230 378
231 substr $_, 0, 1, "" 379 substr $_, 0, 1, ""
232 for values %hdr; 380 for values %hdr;
233 381
234 if (exists $hdr{"content-length"}) { 382 my $finish = sub {
235 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
236 # could cache persistent connection now
237 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
238 # but we don't, due to misdesigns, this is annoyingly complex
239 };
240
241 %state = (); 383 %state = ();
384
385 # set-cookie processing
386 if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
387 for (split /\x00/, $hdr{"set-cookie"}) {
388 my ($cookie, @arg) = split /;\s*/;
389 my ($name, $value) = split /=/, $cookie, 2;
390 my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
391
392 my $cdom = (delete $kv{domain}) || $uhost;
393 my $cpath = (delete $kv{path}) || "/";
394
395 $cdom =~ s/^.?/./; # make sure it starts with a "."
396
397 next if $cdom =~ /\.$/;
398
399 # this is not rfc-like and not netscape-like. go figure.
400 my $ndots = $cdom =~ y/.//;
401 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
402
403 # store it
404 $arg{cookie_jar}{version} = 1;
405 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
406 }
407 }
408
409 if ($_[1]{Status} =~ /^30[12]$/ && $recurse) {
410 # microsoft and other assholes don't give a shit for following standards,
411 # try to support a common form of broken Location header.
412 $_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;
413
414 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
415 } else {
242 $cb->($_[1], \%hdr); 416 $cb->($_[0], $_[1]);
417 }
243 }); 418 };
419
420 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") {
421 $finish->(undef, \%hdr);
244 } else { 422 } else {
423 if (exists $hdr{"content-length"}) {
424 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
425 # could cache persistent connection now
426 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
427 # but we don't, due to misdesigns, this is annoyingly complex
428 };
429
430 $finish->($_[1], \%hdr);
431 });
432 } else {
245 # too bad, need to read until we get an error or EOF, 433 # too bad, need to read until we get an error or EOF,
246 # no way to detect winged data. 434 # no way to detect winged data.
247 $_[0]->on_error (sub { 435 $_[0]->on_error (sub {
248 %state = ();
249 $cb->($_[0]{rbuf}, \%hdr); 436 $finish->($_[0]{rbuf}, \%hdr);
437 });
438 $_[0]->on_eof (undef);
439 $_[0]->on_read (sub { });
440 }
250 }); 441 }
251 $_[0]->on_eof (undef);
252 $_[0]->on_read (sub { });
253 } 442 });
254 }); 443 });
444 }, sub {
445 $timeout
255 }); 446 };
256 }, sub {
257 $timeout
258 }; 447 };
259 448
260 defined wantarray && AnyEvent::Util::guard { %state = () } 449 defined wantarray && AnyEvent::Util::guard { %state = () }
261} 450}
262 451
263sub http_get($$;@) { 452sub http_get($@) {
264 unshift @_, "GET"; 453 unshift @_, "GET";
265 &http_request 454 &http_request
266} 455}
267 456
457sub http_head($@) {
458 unshift @_, "HEAD";
459 &http_request
460}
461
462sub http_post($$@) {
463 unshift @_, "POST", "body";
464 &http_request
465}
466
467=back
468
268=head2 GLOBAL FUNCTIONS AND VARIABLES 469=head2 GLOBAL FUNCTIONS AND VARIABLES
269 470
270=over 4 471=over 4
271 472
272=item AnyEvent::HTTP::set_proxy "proxy-url" 473=item AnyEvent::HTTP::set_proxy "proxy-url"
273 474
274Sets the default proxy server to use. The proxy-url must begin with a 475Sets the default proxy server to use. The proxy-url must begin with a
275string of the form C<http://host:port> (optionally C<https:...>). 476string of the form C<http://host:port> (optionally C<https:...>).
276 477
277=item $AnyEvent::HTTP::MAX_REDIRECTS 478=item $AnyEvent::HTTP::MAX_RECURSE
278 479
279The default value for the C<max_redirects> request parameter 480The default value for the C<recurse> request parameter (default: C<10>).
280(default: C<10>).
281 481
282=item $AnyEvent::HTTP::USERAGENT 482=item $AnyEvent::HTTP::USERAGENT
283 483
284The default value for the C<User-Agent> header (the default is 484The default value for the C<User-Agent> header (the default is
285C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 485C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
286 486
287=item $AnyEvent::HTTP::MAX_PERSISTENT 487=item $AnyEvent::HTTP::MAX_PERSISTENT
288 488
289The maximum number of persistent connections to keep open (default: 8). 489The maximum number of persistent connections to keep open (default: 8).
290 490
491Not implemented currently.
492
291=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT 493=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
292 494
293The maximum time to cache a persistent connection, in seconds (default: 2). 495The maximum time to cache a persistent connection, in seconds (default: 2).
496
497Not implemented currently.
498
499=item $AnyEvent::HTTP::ACTIVE
500
501The number of active connections. This is not the number of currently
502running requests, but the number of currently open and non-idle TCP
503connections. This number of can be useful for load-leveling.
294 504
295=back 505=back
296 506
297=cut 507=cut
298 508

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