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Revision 1.2 by root, Wed Jun 4 11:37:41 2008 UTC vs.
Revision 1.25 by root, Mon Jul 21 05:42:07 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 = '1.03';
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<$method> (e.g. C<GET>, C<POST>). The URL
60must be an absolute http or https URL. 91must be an absolute http or https URL.
61 92
62The callback will be called with the response data as first argument 93The callback will be called with the response data as first argument
63(or C<undef> if it wasn't available due to errors), and a hash-ref with 94(or C<undef> if it wasn't available due to errors), and a hash-ref with
64response headers as second argument. 95response headers as second argument.
65 96
66All the headers in that has are lowercased. In addition to the response 97All the headers in that hash are lowercased. In addition to the response
67headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and 98headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
68C<Reason> contain the three parts of the HTTP Status-Line of the same 99contain the three parts of the HTTP Status-Line of the same name. The
69name. 100pseudo-header C<URL> contains the original URL (which can differ from the
101requested URL when following redirects).
102
103If the server sends a header multiple lines, then their contents will be
104joined together with C<\x00>.
70 105
71If an internal error occurs, such as not being able to resolve a hostname, 106If an internal error occurs, such as not being able to resolve a hostname,
72then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> 107then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>
73and the C<Reason> pseudo-header will contain an error message. 108and the C<Reason> pseudo-header will contain an error message.
74 109
110A typical callback might look like this:
111
112 sub {
113 my ($body, $hdr) = @_;
114
115 if ($hdr->{Status} =~ /^2/) {
116 ... everything should be ok
117 } else {
118 print "error, $hdr->{Status} $hdr->{Reason}\n";
119 }
120 }
121
75Additional parameters are key-value pairs, and are fully optional. They 122Additional parameters are key-value pairs, and are fully optional. They
76include: 123include:
77 124
78=over 4 125=over 4
79 126
80=item recurse => $boolean (default: true) 127=item recurse => $count (default: $MAX_RECURSE)
81 128
82Whether to recurse requests or not, e.g. on redirects, authentication 129Whether to recurse requests or not, e.g. on redirects, authentication
83retries and so on. 130retries and so on, and how often to do so.
84 131
85=item headers => hashref 132=item headers => hashref
86 133
87The request headers to use. 134The request headers to use. Currently, C<http_request> may provide its
135own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
136and will provide defaults for C<User-Agent:> and C<Referer:>.
88 137
89=item timeout => $seconds 138=item timeout => $seconds
90 139
91The time-out to use for various stages - each connect attempt will reset 140The time-out to use for various stages - each connect attempt will reset
92the timeout, as will read or write activity. Default timeout is 5 minutes. 141the timeout, as will read or write activity. Default timeout is 5 minutes.
… …
97default proxy (as specified by C<$ENV{http_proxy}>) is used. 146default proxy (as specified by C<$ENV{http_proxy}>) is used.
98 147
99C<$scheme> must be either missing or C<http> for HTTP, or C<https> for 148C<$scheme> must be either missing or C<http> for HTTP, or C<https> for
100HTTPS. 149HTTPS.
101 150
151=item body => $string
152
153The request body, usually empty. Will be-sent as-is (future versions of
154this module might offer more options).
155
156=item cookie_jar => $hash_ref
157
158Passing this parameter enables (simplified) cookie-processing, loosely
159based on the original netscape specification.
160
161The C<$hash_ref> must be an (initially empty) hash reference which will
162get updated automatically. It is possible to save the cookie_jar to
163persistent storage with something like JSON or Storable, but this is not
164recommended, as expire times are currently being ignored.
165
166Note that this cookie implementation is not of very high quality, nor
167meant to be complete. If you want complete cookie management you have to
168do that on your own. C<cookie_jar> is meant as a quick fix to get some
169cookie-using sites working. Cookies are a privacy disaster, do not use
170them unless required to.
171
102=back 172=back
103 173
104=back 174Example: make a simple HTTP GET request for http://www.nethype.de/
175
176 http_request GET => "http://www.nethype.de/", sub {
177 my ($body, $hdr) = @_;
178 print "$body\n";
179 };
180
181Example: make a HTTP HEAD request on https://www.google.com/, use a
182timeout of 30 seconds.
183
184 http_request
185 GET => "https://www.google.com",
186 timeout => 30,
187 sub {
188 my ($body, $hdr) = @_;
189 use Data::Dumper;
190 print Dumper $hdr;
191 }
192 ;
105 193
106=cut 194=cut
107 195
196sub _slot_schedule;
197sub _slot_schedule($) {
198 my $host = shift;
199
200 while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
201 if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
202 # somebody wants that slot
203 ++$CO_SLOT{$host}[0];
204 ++$ACTIVE;
205
206 $cb->(AnyEvent::Util::guard {
207 --$ACTIVE;
208 --$CO_SLOT{$host}[0];
209 _slot_schedule $host;
210 });
211 } else {
212 # nobody wants the slot, maybe we can forget about it
213 delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
214 last;
215 }
216 }
217}
218
219# wait for a free slot on host, call callback
220sub _get_slot($$) {
221 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
222
223 _slot_schedule $_[0];
224}
225
108sub http_request($$$;@) { 226sub http_request($$@) {
109 my $cb = pop; 227 my $cb = pop;
110 my ($method, $url, %arg) = @_; 228 my ($method, $url, %arg) = @_;
111 229
112 my %hdr; 230 my %hdr;
113 231
232 $method = uc $method;
233
114 if (my $hdr = delete $arg{headers}) { 234 if (my $hdr = $arg{headers}) {
115 while (my ($k, $v) = each %$hdr) { 235 while (my ($k, $v) = each %$hdr) {
116 $hdr{lc $k} = $v; 236 $hdr{lc $k} = $v;
117 } 237 }
118 } 238 }
119 239
240 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
241
242 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url })
243 if $recurse < 0;
244
120 my $proxy = $arg{proxy} || $PROXY; 245 my $proxy = $arg{proxy} || $PROXY;
121 my $timeout = $arg{timeout} || $TIMEOUT; 246 my $timeout = $arg{timeout} || $TIMEOUT;
122 247
123 $hdr{"user-agent"} ||= $USERAGENT; 248 $hdr{"user-agent"} ||= $USERAGENT;
124 249
125 my ($host, $port, $path, $scheme); 250 my ($scheme, $authority, $upath, $query, $fragment) =
251 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
252
253 $scheme = lc $scheme;
254
255 my $uport = $scheme eq "http" ? 80
256 : $scheme eq "https" ? 443
257 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url });
258
259 $hdr{referer} ||= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic
260
261 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
262 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url });
263
264 my $uhost = $1;
265 $uport = $2 if defined $2;
266
267 $uhost =~ s/^\[(.*)\]$/$1/;
268 $upath .= "?$query" if length $query;
269
270 $upath =~ s%^/?%/%;
271
272 # cookie processing
273 if (my $jar = $arg{cookie_jar}) {
274 %$jar = () if $jar->{version} < 1;
275
276 my @cookie;
277
278 while (my ($chost, $v) = each %$jar) {
279 next unless $chost eq substr $uhost, -length $chost;
280 next unless $chost =~ /^\./;
281
282 while (my ($cpath, $v) = each %$v) {
283 next unless $cpath eq substr $upath, 0, length $cpath;
284
285 while (my ($k, $v) = each %$v) {
286 next if $scheme ne "https" && exists $v->{secure};
287 push @cookie, "$k=$v->{value}";
288 }
289 }
290 }
291
292 $hdr{cookie} = join "; ", @cookie
293 if @cookie;
294 }
295
296 my ($rhost, $rport, $rpath); # request host, port, path
126 297
127 if ($proxy) { 298 if ($proxy) {
128 ($host, $port, $scheme) = @$proxy; 299 ($rhost, $rport, $scheme) = @$proxy;
129 $path = $url; 300 $rpath = $url;
130 } else { 301 } else {
131 ($scheme, my $authority, $path, my $query, my $fragment) = 302 ($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; 303 $hdr{host} = $uhost;
150 } 304 }
151 305
152 $scheme = lc $scheme;
153
154 my %state;
155
156 my $body = "";
157 $state{body} = $body;
158
159 $hdr{"content-length"} = length $body; 306 $hdr{"content-length"} = length $arg{body};
160 307
308 my %state = (connect_guard => 1);
309
310 _get_slot $uhost, sub {
311 $state{slot_guard} = shift;
312
313 return unless $state{connect_guard};
314
161 $state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub { 315 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
162 $state{fh} = shift 316 $state{fh} = shift
163 or return $cb->(undef, { Status => 599, Reason => "$!" }); 317 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url });
164 318
165 delete $state{connect_guard}; # reduce memory usage, save a tree 319 delete $state{connect_guard}; # reduce memory usage, save a tree
166 320
167 # get handle 321 # get handle
168 $state{handle} = new AnyEvent::Handle 322 $state{handle} = new AnyEvent::Handle
169 fh => $state{fh}, 323 fh => $state{fh},
170 ($scheme eq "https" ? (tls => "connect") : ()); 324 ($scheme eq "https" ? (tls => "connect") : ());
171 325
172 # limit the number of persistent connections 326 # limit the number of persistent connections
173 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 327 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
174 ++$KA_COUNT{$_[1]}; 328 ++$KA_COUNT{$_[1]};
175 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 329 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };
176 $hdr{connection} = "keep-alive"; 330 $hdr{connection} = "keep-alive";
177 delete $hdr{connection}; # keep-alive not yet supported 331 delete $hdr{connection}; # keep-alive not yet supported
178 } else { 332 } else {
179 delete $hdr{connection}; 333 delete $hdr{connection};
180 } 334 }
181 335
182 # (re-)configure handle 336 # (re-)configure handle
183 $state{handle}->timeout ($timeout); 337 $state{handle}->timeout ($timeout);
184 $state{handle}->on_error (sub { 338 $state{handle}->on_error (sub {
339 my $errno = "$!";
185 %state = (); 340 %state = ();
186 $cb->(undef, { Status => 599, Reason => "$!" }); 341 $cb->(undef, { Status => 599, Reason => $errno, URL => $url });
187 }); 342 });
188 $state{handle}->on_eof (sub { 343 $state{handle}->on_eof (sub {
189 %state = (); 344 %state = ();
190 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" }); 345 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url });
191 }); 346 });
192 347
193 # send request 348 # send request
194 $state{handle}->push_write ( 349 $state{handle}->push_write (
195 "\U$method\E $path HTTP/1.0\015\012" 350 "$method $rpath HTTP/1.0\015\012"
196 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) 351 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
197 . "\015\012" 352 . "\015\012"
198 . (delete $state{body}) 353 . (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 ); 354 );
213 355
356 %hdr = (); # reduce memory usage, save a kitten
357
358 # status line
359 $state{handle}->push_read (line => qr/\015?\012/, sub {
360 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
361 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
362
363 my %hdr = ( # response headers
364 HTTPVersion => "\x00$1",
365 Status => "\x00$2",
366 Reason => "\x00$3",
367 URL => "\x00$url"
368 );
369
214 # headers, could be optimized a bit 370 # headers, could be optimized a bit
215 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 371 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
216 for ("$_[1]\012") { 372 for ("$_[1]\012") {
217 # we support spaces in field names, as lotus domino 373 # we support spaces in field names, as lotus domino
218 # creates them. 374 # creates them.
219 $hdr{lc $1} .= ",$2" 375 $hdr{lc $1} .= "\x00$2"
220 while /\G 376 while /\G
221 ([^:\000-\037]+): 377 ([^:\000-\037]+):
222 [\011\040]* 378 [\011\040]*
223 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 379 ((?: [^\015\012]+ | \015?\012[\011\040] )*)
224 \015?\012 380 \015?\012
225 /gxc; 381 /gxc;
226 382
227 /\G$/ 383 /\G$/
228 or return $cb->(undef, { Status => 599, Reason => "garbled response headers" }); 384 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url }));
229 } 385 }
230 386
231 substr $_, 0, 1, "" 387 substr $_, 0, 1, ""
232 for values %hdr; 388 for values %hdr;
233 389
234 if (exists $hdr{"content-length"}) { 390 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 = (); 391 %state = ();
392
393 # set-cookie processing
394 if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
395 for (split /\x00/, $hdr{"set-cookie"}) {
396 my ($cookie, @arg) = split /;\s*/;
397 my ($name, $value) = split /=/, $cookie, 2;
398 my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
399
400 my $cdom = (delete $kv{domain}) || $uhost;
401 my $cpath = (delete $kv{path}) || "/";
402
403 $cdom =~ s/^.?/./; # make sure it starts with a "."
404
405 next if $cdom =~ /\.$/;
406
407 # this is not rfc-like and not netscape-like. go figure.
408 my $ndots = $cdom =~ y/.//;
409 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
410
411 # store it
412 $arg{cookie_jar}{version} = 1;
413 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
414 }
415 }
416
417 # microsoft and other shitheads don't give a shit for following standards,
418 # try to support some common forms of broken Location headers.
419 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
420 $_[1]{location} =~ s/^\.\/+//;
421
422 my $url = "$scheme://$uhost:$uport";
423
424 unless ($_[1]{location} =~ s/^\///) {
425 $url .= $upath;
426 $url =~ s/\/[^\/]*$//;
427 }
428
429 $_[1]{location} = "$url/$_[1]{location}";
430 }
431
432 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
433 # apparently, mozilla et al. just change POST to GET here
434 # more research is needed before we do the same
435 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
436 } elsif ($_[1]{Status} == 303 && $recurse) {
437 # even http/1.1 is unlear on how to mutate the method
438 $method = "GET" unless $method eq "HEAD";
439 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
440 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
441 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
442 } else {
242 $cb->($_[1], \%hdr); 443 $cb->($_[0], $_[1]);
444 }
243 }); 445 };
446
447 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") {
448 $finish->(undef, \%hdr);
244 } else { 449 } else {
450 if (exists $hdr{"content-length"}) {
451 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
452 # could cache persistent connection now
453 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
454 # but we don't, due to misdesigns, this is annoyingly complex
455 };
456
457 $finish->($_[1], \%hdr);
458 });
459 } else {
245 # too bad, need to read until we get an error or EOF, 460 # too bad, need to read until we get an error or EOF,
246 # no way to detect winged data. 461 # no way to detect winged data.
247 $_[0]->on_error (sub { 462 $_[0]->on_error (sub {
248 %state = ();
249 $cb->($_[0]{rbuf}, \%hdr); 463 $finish->($_[0]{rbuf}, \%hdr);
464 });
465 $_[0]->on_eof (undef);
466 $_[0]->on_read (sub { });
467 }
250 }); 468 }
251 $_[0]->on_eof (undef);
252 $_[0]->on_read (sub { });
253 } 469 });
254 }); 470 });
471 }, sub {
472 $timeout
255 }); 473 };
256 }, sub {
257 $timeout
258 }; 474 };
259 475
260 defined wantarray && AnyEvent::Util::guard { %state = () } 476 defined wantarray && AnyEvent::Util::guard { %state = () }
261} 477}
262 478
263sub http_get($$;@) { 479sub http_get($@) {
264 unshift @_, "GET"; 480 unshift @_, "GET";
265 &http_request 481 &http_request
266} 482}
267 483
484sub http_head($@) {
485 unshift @_, "HEAD";
486 &http_request
487}
488
489sub http_post($$@) {
490 my $url = shift;
491 unshift @_, "POST", $url, "body";
492 &http_request
493}
494
495=back
496
268=head2 GLOBAL FUNCTIONS AND VARIABLES 497=head2 GLOBAL FUNCTIONS AND VARIABLES
269 498
270=over 4 499=over 4
271 500
272=item AnyEvent::HTTP::set_proxy "proxy-url" 501=item AnyEvent::HTTP::set_proxy "proxy-url"
273 502
274Sets the default proxy server to use. The proxy-url must begin with a 503Sets the default proxy server to use. The proxy-url must begin with a
275string of the form C<http://host:port> (optionally C<https:...>). 504string of the form C<http://host:port> (optionally C<https:...>).
276 505
277=item $AnyEvent::HTTP::MAX_REDIRECTS 506=item $AnyEvent::HTTP::MAX_RECURSE
278 507
279The default value for the C<max_redirects> request parameter 508The default value for the C<recurse> request parameter (default: C<10>).
280(default: C<10>).
281 509
282=item $AnyEvent::HTTP::USERAGENT 510=item $AnyEvent::HTTP::USERAGENT
283 511
284The default value for the C<User-Agent> header (the default is 512The default value for the C<User-Agent> header (the default is
285C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 513C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
286 514
287=item $AnyEvent::HTTP::MAX_PERSISTENT 515=item $AnyEvent::HTTP::MAX_PERSISTENT
288 516
289The maximum number of persistent connections to keep open (default: 8). 517The maximum number of persistent connections to keep open (default: 8).
290 518
519Not implemented currently.
520
291=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT 521=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
292 522
293The maximum time to cache a persistent connection, in seconds (default: 2). 523The maximum time to cache a persistent connection, in seconds (default: 2).
524
525Not implemented currently.
526
527=item $AnyEvent::HTTP::ACTIVE
528
529The number of active connections. This is not the number of currently
530running requests, but the number of currently open and non-idle TCP
531connections. This number of can be useful for load-leveling.
294 532
295=back 533=back
296 534
297=cut 535=cut
298 536
… …
307 545
308L<AnyEvent>. 546L<AnyEvent>.
309 547
310=head1 AUTHOR 548=head1 AUTHOR
311 549
312 Marc Lehmann <schmorp@schmorp.de> 550 Marc Lehmann <schmorp@schmorp.de>
313 http://home.schmorp.de/ 551 http://home.schmorp.de/
314 552
315=cut 553=cut
316 554
3171 5551
318 556

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