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Revision 1.2 by root, Wed Jun 4 11:37:41 2008 UTC vs.
Revision 1.19 by elmex, Mon Jun 9 13:02:13 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 = '1.01';
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_REDIRECTS = 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.
77
78=item http_head $url, key => value..., $cb->($data, $headers)
79
80Executes an HTTP-HEAD request. See the http_request function for details on
81additional parameters.
82
83=item http_post $url, $body, key => value..., $cb->($data, $headers)
84
85Executes an HTTP-POST request with a request body of C<$bod>. See the
86http_request function for details on additional parameters.
56 87
57=item http_request $method => $url, key => value..., $cb->($data, $headers) 88=item http_request $method => $url, key => value..., $cb->($data, $headers)
58 89
59Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL 90Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
60must be an absolute http or https URL. 91must be an absolute http or https URL.
61 92
62The callback will be called with the response data as first argument 93The callback will be called with the response data as first argument
63(or C<undef> if it wasn't available due to errors), and a hash-ref with 94(or C<undef> if it wasn't available due to errors), and a hash-ref with
64response headers as second argument. 95response headers as second argument.
65 96
66All the headers in that has are lowercased. In addition to the response 97All the headers in that hash are lowercased. In addition to the response
67headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and 98headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and
68C<Reason> contain the three parts of the HTTP Status-Line of the same 99C<Reason> contain the three parts of the HTTP Status-Line of the same
69name. 100name. If the server sends a header multiple lines, then their contents
101will be joined together with C<\x00>.
70 102
71If an internal error occurs, such as not being able to resolve a hostname, 103If an internal error occurs, such as not being able to resolve a hostname,
72then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> 104then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>
73and the C<Reason> pseudo-header will contain an error message. 105and the C<Reason> pseudo-header will contain an error message.
74 106
107A typical callback might look like this:
108
109 sub {
110 my ($body, $hdr) = @_;
111
112 if ($hdr->{Status} =~ /^2/) {
113 ... everything should be ok
114 } else {
115 print "error, $hdr->{Status} $hdr->{Reason}\n";
116 }
117 }
118
75Additional parameters are key-value pairs, and are fully optional. They 119Additional parameters are key-value pairs, and are fully optional. They
76include: 120include:
77 121
78=over 4 122=over 4
79 123
80=item recurse => $boolean (default: true) 124=item recurse => $count (default: $MAX_RECURSE)
81 125
82Whether to recurse requests or not, e.g. on redirects, authentication 126Whether to recurse requests or not, e.g. on redirects, authentication
83retries and so on. 127retries and so on, and how often to do so.
84 128
85=item headers => hashref 129=item headers => hashref
86 130
87The request headers to use. 131The request headers to use. Currently, C<http_request> may provide its
132own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
133and will provide defaults for C<User-Agent:> and C<Referer:>.
88 134
89=item timeout => $seconds 135=item timeout => $seconds
90 136
91The time-out to use for various stages - each connect attempt will reset 137The time-out to use for various stages - each connect attempt will reset
92the timeout, as will read or write activity. Default timeout is 5 minutes. 138the timeout, as will read or write activity. Default timeout is 5 minutes.
… …
97default proxy (as specified by C<$ENV{http_proxy}>) is used. 143default proxy (as specified by C<$ENV{http_proxy}>) is used.
98 144
99C<$scheme> must be either missing or C<http> for HTTP, or C<https> for 145C<$scheme> must be either missing or C<http> for HTTP, or C<https> for
100HTTPS. 146HTTPS.
101 147
148=item body => $string
149
150The request body, usually empty. Will be-sent as-is (future versions of
151this module might offer more options).
152
153=item cookie_jar => $hash_ref
154
155Passing this parameter enables (simplified) cookie-processing, loosely
156based on the original netscape specification.
157
158The C<$hash_ref> must be an (initially empty) hash reference which will
159get updated automatically. It is possible to save the cookie_jar to
160persistent storage with something like JSON or Storable, but this is not
161recommended, as expire times are currently being ignored.
162
163Note that this cookie implementation is not of very high quality, nor
164meant to be complete. If you want complete cookie management you have to
165do that on your own. C<cookie_jar> is meant as a quick fix to get some
166cookie-using sites working. Cookies are a privacy disaster, do not use
167them unless required to.
168
102=back 169=back
103 170
104=back 171Example: make a simple HTTP GET request for http://www.nethype.de/
172
173 http_request GET => "http://www.nethype.de/", sub {
174 my ($body, $hdr) = @_;
175 print "$body\n";
176 };
177
178Example: make a HTTP HEAD request on https://www.google.com/, use a
179timeout of 30 seconds.
180
181 http_request
182 GET => "https://www.google.com",
183 timeout => 30,
184 sub {
185 my ($body, $hdr) = @_;
186 use Data::Dumper;
187 print Dumper $hdr;
188 }
189 ;
105 190
106=cut 191=cut
107 192
193sub _slot_schedule;
194sub _slot_schedule($) {
195 my $host = shift;
196
197 while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
198 if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
199 # somebody wants that slot
200 ++$CO_SLOT{$host}[0];
201 ++$ACTIVE;
202
203 $cb->(AnyEvent::Util::guard {
204 --$ACTIVE;
205 --$CO_SLOT{$host}[0];
206 _slot_schedule $host;
207 });
208 } else {
209 # nobody wants the slot, maybe we can forget about it
210 delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
211 last;
212 }
213 }
214}
215
216# wait for a free slot on host, call callback
217sub _get_slot($$) {
218 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
219
220 _slot_schedule $_[0];
221}
222
108sub http_request($$$;@) { 223sub http_request($$@) {
109 my $cb = pop; 224 my $cb = pop;
110 my ($method, $url, %arg) = @_; 225 my ($method, $url, %arg) = @_;
111 226
112 my %hdr; 227 my %hdr;
113 228
229 $method = uc $method;
230
114 if (my $hdr = delete $arg{headers}) { 231 if (my $hdr = $arg{headers}) {
115 while (my ($k, $v) = each %$hdr) { 232 while (my ($k, $v) = each %$hdr) {
116 $hdr{lc $k} = $v; 233 $hdr{lc $k} = $v;
117 } 234 }
118 } 235 }
119 236
237 my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;
238
239 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url })
240 if $recurse < 0;
241
120 my $proxy = $arg{proxy} || $PROXY; 242 my $proxy = $arg{proxy} || $PROXY;
121 my $timeout = $arg{timeout} || $TIMEOUT; 243 my $timeout = $arg{timeout} || $TIMEOUT;
122 244
123 $hdr{"user-agent"} ||= $USERAGENT; 245 $hdr{"user-agent"} ||= $USERAGENT;
124 246
125 my ($host, $port, $path, $scheme); 247 my ($scheme, $authority, $upath, $query, $fragment) =
248 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
249
250 $scheme = lc $scheme;
251
252 my $uport = $scheme eq "http" ? 80
253 : $scheme eq "https" ? 443
254 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url });
255
256 $hdr{referer} ||= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic
257
258 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
259 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url });
260
261 my $uhost = $1;
262 $uport = $2 if defined $2;
263
264 $uhost =~ s/^\[(.*)\]$/$1/;
265 $upath .= "?$query" if length $query;
266
267 $upath =~ s%^/?%/%;
268
269 # cookie processing
270 if (my $jar = $arg{cookie_jar}) {
271 %$jar = () if $jar->{version} < 1;
272
273 my @cookie;
274
275 while (my ($chost, $v) = each %$jar) {
276 next unless $chost eq substr $uhost, -length $chost;
277 next unless $chost =~ /^\./;
278
279 while (my ($cpath, $v) = each %$v) {
280 next unless $cpath eq substr $upath, 0, length $cpath;
281
282 while (my ($k, $v) = each %$v) {
283 next if $scheme ne "https" && exists $v->{secure};
284 push @cookie, "$k=$v->{value}";
285 }
286 }
287 }
288
289 $hdr{cookie} = join "; ", @cookie
290 if @cookie;
291 }
292
293 my ($rhost, $rport, $rpath); # request host, port, path
126 294
127 if ($proxy) { 295 if ($proxy) {
128 ($host, $port, $scheme) = @$proxy; 296 ($rhost, $rport, $scheme) = @$proxy;
129 $path = $url; 297 $rpath = $url;
130 } else { 298 } else {
131 ($scheme, my $authority, $path, my $query, my $fragment) = 299 ($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; 300 $hdr{host} = $uhost;
150 } 301 }
151 302
152 $scheme = lc $scheme;
153
154 my %state;
155
156 my $body = "";
157 $state{body} = $body;
158
159 $hdr{"content-length"} = length $body; 303 $hdr{"content-length"} = length $arg{body};
160 304
305 my %state = (connect_guard => 1);
306
307 _get_slot $uhost, sub {
308 $state{slot_guard} = shift;
309
310 return unless $state{connect_guard};
311
161 $state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub { 312 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
162 $state{fh} = shift 313 $state{fh} = shift
163 or return $cb->(undef, { Status => 599, Reason => "$!" }); 314 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url });
164 315
165 delete $state{connect_guard}; # reduce memory usage, save a tree 316 delete $state{connect_guard}; # reduce memory usage, save a tree
166 317
167 # get handle 318 # get handle
168 $state{handle} = new AnyEvent::Handle 319 $state{handle} = new AnyEvent::Handle
169 fh => $state{fh}, 320 fh => $state{fh},
170 ($scheme eq "https" ? (tls => "connect") : ()); 321 ($scheme eq "https" ? (tls => "connect") : ());
171 322
172 # limit the number of persistent connections 323 # limit the number of persistent connections
173 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 324 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
174 ++$KA_COUNT{$_[1]}; 325 ++$KA_COUNT{$_[1]};
175 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 326 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };
176 $hdr{connection} = "keep-alive"; 327 $hdr{connection} = "keep-alive";
177 delete $hdr{connection}; # keep-alive not yet supported 328 delete $hdr{connection}; # keep-alive not yet supported
178 } else { 329 } else {
179 delete $hdr{connection}; 330 delete $hdr{connection};
180 } 331 }
181 332
182 # (re-)configure handle 333 # (re-)configure handle
183 $state{handle}->timeout ($timeout); 334 $state{handle}->timeout ($timeout);
184 $state{handle}->on_error (sub { 335 $state{handle}->on_error (sub {
336 my $errno = "$!";
185 %state = (); 337 %state = ();
186 $cb->(undef, { Status => 599, Reason => "$!" }); 338 $cb->(undef, { Status => 599, Reason => $errno, URL => $url });
187 }); 339 });
188 $state{handle}->on_eof (sub { 340 $state{handle}->on_eof (sub {
189 %state = (); 341 %state = ();
190 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" }); 342 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url });
191 }); 343 });
192 344
193 # send request 345 # send request
194 $state{handle}->push_write ( 346 $state{handle}->push_write (
195 "\U$method\E $path HTTP/1.0\015\012" 347 "$method $rpath HTTP/1.0\015\012"
196 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) 348 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
197 . "\015\012" 349 . "\015\012"
198 . (delete $state{body}) 350 . (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 ); 351 );
213 352
353 %hdr = (); # reduce memory usage, save a kitten
354
355 # status line
356 $state{handle}->push_read (line => qr/\015?\012/, sub {
357 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
358 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
359
360 my %hdr = ( # response headers
361 HTTPVersion => "\x00$1",
362 Status => "\x00$2",
363 Reason => "\x00$3",
364 URL => "\x00$url"
365 );
366
214 # headers, could be optimized a bit 367 # headers, could be optimized a bit
215 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 368 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
216 for ("$_[1]\012") { 369 for ("$_[1]\012") {
217 # we support spaces in field names, as lotus domino 370 # we support spaces in field names, as lotus domino
218 # creates them. 371 # creates them.
219 $hdr{lc $1} .= ",$2" 372 $hdr{lc $1} .= "\x00$2"
220 while /\G 373 while /\G
221 ([^:\000-\037]+): 374 ([^:\000-\037]+):
222 [\011\040]* 375 [\011\040]*
223 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 376 ((?: [^\015\012]+ | \015?\012[\011\040] )*)
224 \015?\012 377 \015?\012
225 /gxc; 378 /gxc;
226 379
227 /\G$/ 380 /\G$/
228 or return $cb->(undef, { Status => 599, Reason => "garbled response headers" }); 381 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url }));
229 } 382 }
230 383
231 substr $_, 0, 1, "" 384 substr $_, 0, 1, ""
232 for values %hdr; 385 for values %hdr;
233 386
234 if (exists $hdr{"content-length"}) { 387 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 = (); 388 %state = ();
389
390 # set-cookie processing
391 if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
392 for (split /\x00/, $hdr{"set-cookie"}) {
393 my ($cookie, @arg) = split /;\s*/;
394 my ($name, $value) = split /=/, $cookie, 2;
395 my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
396
397 my $cdom = (delete $kv{domain}) || $uhost;
398 my $cpath = (delete $kv{path}) || "/";
399
400 $cdom =~ s/^.?/./; # make sure it starts with a "."
401
402 next if $cdom =~ /\.$/;
403
404 # this is not rfc-like and not netscape-like. go figure.
405 my $ndots = $cdom =~ y/.//;
406 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
407
408 # store it
409 $arg{cookie_jar}{version} = 1;
410 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
411 }
412 }
413
414 if ($_[1]{Status} =~ /^30[12]$/ && $recurse) {
415 # microsoft and other assholes don't give a shit for following standards,
416 # try to support a common form of broken Location header.
417 $_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;
418
419 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
420 } else {
242 $cb->($_[1], \%hdr); 421 $cb->($_[0], $_[1]);
422 }
243 }); 423 };
424
425 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") {
426 $finish->(undef, \%hdr);
244 } else { 427 } else {
428 if (exists $hdr{"content-length"}) {
429 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
430 # could cache persistent connection now
431 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
432 # but we don't, due to misdesigns, this is annoyingly complex
433 };
434
435 $finish->($_[1], \%hdr);
436 });
437 } else {
245 # too bad, need to read until we get an error or EOF, 438 # too bad, need to read until we get an error or EOF,
246 # no way to detect winged data. 439 # no way to detect winged data.
247 $_[0]->on_error (sub { 440 $_[0]->on_error (sub {
248 %state = ();
249 $cb->($_[0]{rbuf}, \%hdr); 441 $finish->($_[0]{rbuf}, \%hdr);
442 });
443 $_[0]->on_eof (undef);
444 $_[0]->on_read (sub { });
445 }
250 }); 446 }
251 $_[0]->on_eof (undef);
252 $_[0]->on_read (sub { });
253 } 447 });
254 }); 448 });
449 }, sub {
450 $timeout
255 }); 451 };
256 }, sub {
257 $timeout
258 }; 452 };
259 453
260 defined wantarray && AnyEvent::Util::guard { %state = () } 454 defined wantarray && AnyEvent::Util::guard { %state = () }
261} 455}
262 456
263sub http_get($$;@) { 457sub http_get($@) {
264 unshift @_, "GET"; 458 unshift @_, "GET";
265 &http_request 459 &http_request
266} 460}
267 461
462sub http_head($@) {
463 unshift @_, "HEAD";
464 &http_request
465}
466
467sub http_post($$@) {
468 unshift @_, "POST", "body";
469 &http_request
470}
471
472=back
473
268=head2 GLOBAL FUNCTIONS AND VARIABLES 474=head2 GLOBAL FUNCTIONS AND VARIABLES
269 475
270=over 4 476=over 4
271 477
272=item AnyEvent::HTTP::set_proxy "proxy-url" 478=item AnyEvent::HTTP::set_proxy "proxy-url"
273 479
274Sets the default proxy server to use. The proxy-url must begin with a 480Sets the default proxy server to use. The proxy-url must begin with a
275string of the form C<http://host:port> (optionally C<https:...>). 481string of the form C<http://host:port> (optionally C<https:...>).
276 482
277=item $AnyEvent::HTTP::MAX_REDIRECTS 483=item $AnyEvent::HTTP::MAX_RECURSE
278 484
279The default value for the C<max_redirects> request parameter 485The default value for the C<recurse> request parameter (default: C<10>).
280(default: C<10>).
281 486
282=item $AnyEvent::HTTP::USERAGENT 487=item $AnyEvent::HTTP::USERAGENT
283 488
284The default value for the C<User-Agent> header (the default is 489The default value for the C<User-Agent> header (the default is
285C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 490C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
286 491
287=item $AnyEvent::HTTP::MAX_PERSISTENT 492=item $AnyEvent::HTTP::MAX_PERSISTENT
288 493
289The maximum number of persistent connections to keep open (default: 8). 494The maximum number of persistent connections to keep open (default: 8).
290 495
496Not implemented currently.
497
291=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT 498=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
292 499
293The maximum time to cache a persistent connection, in seconds (default: 2). 500The maximum time to cache a persistent connection, in seconds (default: 2).
501
502Not implemented currently.
503
504=item $AnyEvent::HTTP::ACTIVE
505
506The number of active connections. This is not the number of currently
507running requests, but the number of currently open and non-idle TCP
508connections. This number of can be useful for load-leveling.
294 509
295=back 510=back
296 511
297=cut 512=cut
298 513
… …
307 522
308L<AnyEvent>. 523L<AnyEvent>.
309 524
310=head1 AUTHOR 525=head1 AUTHOR
311 526
312 Marc Lehmann <schmorp@schmorp.de> 527 Marc Lehmann <schmorp@schmorp.de>
313 http://home.schmorp.de/ 528 http://home.schmorp.de/
314 529
315=cut 530=cut
316 531
3171 5321
318 533

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