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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.2 by root, Wed Jun 4 11:37:41 2008 UTC vs.
Revision 1.30 by root, Thu Oct 23 02:46:20 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_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 and the return value.
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
83=item http_post $url, $body, key => value..., $cb->($data, $headers)
84
85Executes an HTTP-POST request with a request body of C<$body>. See the
86http_request function for details on additional parameters and the return
87value.
56 88
57=item http_request $method => $url, key => value..., $cb->($data, $headers) 89=item http_request $method => $url, key => value..., $cb->($data, $headers)
58 90
59Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL 91Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
60must be an absolute http or https URL. 92must be an absolute http or https URL.
93
94When called in void context, nothing is returned. In other contexts,
95C<http_request> returns a "cancellation guard" - you have to keep the
96object at least alive until the callback get called. If the object gets
97destroyed before the callbakc is called, the request will be cancelled.
61 98
62The callback will be called with the response data as first argument 99The callback will be called with the response data as first argument
63(or C<undef> if it wasn't available due to errors), and a hash-ref with 100(or C<undef> if it wasn't available due to errors), and a hash-ref with
64response headers as second argument. 101response headers as second argument.
65 102
66All the headers in that has are lowercased. In addition to the response 103All the headers in that hash are lowercased. In addition to the response
67headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and 104headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
68C<Reason> contain the three parts of the HTTP Status-Line of the same 105contain the three parts of the HTTP Status-Line of the same name. The
69name. 106pseudo-header C<URL> contains the original URL (which can differ from the
107requested URL when following redirects).
108
109If the server sends a header multiple lines, then their contents will be
110joined together with C<\x00>.
70 111
71If an internal error occurs, such as not being able to resolve a hostname, 112If an internal error occurs, such as not being able to resolve a hostname,
72then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> 113then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>
73and the C<Reason> pseudo-header will contain an error message. 114and the C<Reason> pseudo-header will contain an error message.
74 115
116A typical callback might look like this:
117
118 sub {
119 my ($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
75Additional parameters are key-value pairs, and are fully optional. They 128Additional parameters are key-value pairs, and are fully optional. They
76include: 129include:
77 130
78=over 4 131=over 4
79 132
80=item recurse => $boolean (default: true) 133=item recurse => $count (default: $MAX_RECURSE)
81 134
82Whether to recurse requests or not, e.g. on redirects, authentication 135Whether to recurse requests or not, e.g. on redirects, authentication
83retries and so on. 136retries and so on, and how often to do so.
84 137
85=item headers => hashref 138=item headers => hashref
86 139
87The 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:>.
88 143
89=item timeout => $seconds 144=item timeout => $seconds
90 145
91The time-out to use for various stages - each connect attempt will reset 146The time-out to use for various stages - each connect attempt will reset
92the timeout, as will read or write activity. Default timeout is 5 minutes. 147the timeout, as will read or write activity. Default timeout is 5 minutes.
… …
97default proxy (as specified by C<$ENV{http_proxy}>) is used. 152default proxy (as specified by C<$ENV{http_proxy}>) is used.
98 153
99C<$scheme> must be either missing or C<http> for HTTP, or C<https> for 154C<$scheme> must be either missing or C<http> for HTTP, or C<https> for
100HTTPS. 155HTTPS.
101 156
157=item body => $string
158
159The request body, usually empty. Will be-sent as-is (future versions of
160this module might offer more options).
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
102=back 178=back
103 179
104=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 $request;
105 209
106=cut 210=cut
107 211
212sub _slot_schedule;
213sub _slot_schedule($) {
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($$) {
237 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
238
239 _slot_schedule $_[0];
240}
241
108sub http_request($$$;@) { 242sub http_request($$@) {
109 my $cb = pop; 243 my $cb = pop;
110 my ($method, $url, %arg) = @_; 244 my ($method, $url, %arg) = @_;
111 245
112 my %hdr; 246 my %hdr;
113 247
248 $method = uc $method;
249
114 if (my $hdr = delete $arg{headers}) { 250 if (my $hdr = $arg{headers}) {
115 while (my ($k, $v) = each %$hdr) { 251 while (my ($k, $v) = each %$hdr) {
116 $hdr{lc $k} = $v; 252 $hdr{lc $k} = $v;
117 } 253 }
118 } 254 }
119 255
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
120 my $proxy = $arg{proxy} || $PROXY; 261 my $proxy = $arg{proxy} || $PROXY;
121 my $timeout = $arg{timeout} || $TIMEOUT; 262 my $timeout = $arg{timeout} || $TIMEOUT;
122 263
123 $hdr{"user-agent"} ||= $USERAGENT; 264 $hdr{"user-agent"} ||= $USERAGENT;
124 265
125 my ($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 if ($chost =~ /^\./) {
296 next unless $chost eq substr $uhost, -length $chost;
297 } elsif ($chost =~ /\./) {
298 next unless $chost eq $uhost;
299 } else {
300 next;
301 }
302
303 while (my ($cpath, $v) = each %$v) {
304 next unless $cpath eq substr $upath, 0, length $cpath;
305
306 while (my ($k, $v) = each %$v) {
307 next if $scheme ne "https" && exists $v->{secure};
308 push @cookie, "$k=$v->{value}";
309 }
310 }
311 }
312
313 $hdr{cookie} = join "; ", @cookie
314 if @cookie;
315 }
316
317 my ($rhost, $rport, $rpath); # request host, port, path
126 318
127 if ($proxy) { 319 if ($proxy) {
128 ($host, $port, $scheme) = @$proxy; 320 ($rhost, $rport, $scheme) = @$proxy;
129 $path = $url; 321 $rpath = $url;
130 } else { 322 } else {
131 ($scheme, my $authority, $path, my $query, my $fragment) = 323 ($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; 324 $hdr{host} = $uhost;
150 } 325 }
151 326
152 $scheme = lc $scheme;
153
154 my %state;
155
156 my $body = "";
157 $state{body} = $body;
158
159 $hdr{"content-length"} = length $body; 327 $hdr{"content-length"} = length $arg{body};
160 328
329 my %state = (connect_guard => 1);
330
331 _get_slot $uhost, sub {
332 $state{slot_guard} = shift;
333
334 return unless $state{connect_guard};
335
161 $state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub { 336 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
162 $state{fh} = shift 337 $state{fh} = shift
163 or return $cb->(undef, { Status => 599, Reason => "$!" }); 338 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url });
164 339
165 delete $state{connect_guard}; # reduce memory usage, save a tree 340 delete $state{connect_guard}; # reduce memory usage, save a tree
166 341
167 # get handle 342 # get handle
168 $state{handle} = new AnyEvent::Handle 343 $state{handle} = new AnyEvent::Handle
169 fh => $state{fh}, 344 fh => $state{fh},
170 ($scheme eq "https" ? (tls => "connect") : ()); 345 ($scheme eq "https" ? (tls => "connect") : ());
171 346
172 # limit the number of persistent connections 347 # limit the number of persistent connections
173 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 348 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
174 ++$KA_COUNT{$_[1]}; 349 ++$KA_COUNT{$_[1]};
175 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 350 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };
176 $hdr{connection} = "keep-alive"; 351 $hdr{connection} = "keep-alive";
177 delete $hdr{connection}; # keep-alive not yet supported 352 delete $hdr{connection}; # keep-alive not yet supported
178 } else { 353 } else {
179 delete $hdr{connection}; 354 delete $hdr{connection};
180 } 355 }
181 356
182 # (re-)configure handle 357 # (re-)configure handle
183 $state{handle}->timeout ($timeout); 358 $state{handle}->timeout ($timeout);
184 $state{handle}->on_error (sub { 359 $state{handle}->on_error (sub {
360 my $errno = "$!";
185 %state = (); 361 %state = ();
186 $cb->(undef, { Status => 599, Reason => "$!" }); 362 $cb->(undef, { Status => 599, Reason => $errno, URL => $url });
187 }); 363 });
188 $state{handle}->on_eof (sub { 364 $state{handle}->on_eof (sub {
189 %state = (); 365 %state = ();
190 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" }); 366 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url });
191 }); 367 });
192 368
193 # send request 369 # send request
194 $state{handle}->push_write ( 370 $state{handle}->push_write (
195 "\U$method\E $path HTTP/1.0\015\012" 371 "$method $rpath HTTP/1.0\015\012"
196 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) 372 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
197 . "\015\012" 373 . "\015\012"
198 . (delete $state{body}) 374 . (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 ); 375 );
213 376
377 %hdr = (); # reduce memory usage, save a kitten
378
379 # status line
380 $state{handle}->push_read (line => qr/\015?\012/, sub {
381 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
382 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
383
384 my %hdr = ( # response headers
385 HTTPVersion => "\x00$1",
386 Status => "\x00$2",
387 Reason => "\x00$3",
388 URL => "\x00$url"
389 );
390
214 # headers, could be optimized a bit 391 # headers, could be optimized a bit
215 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 392 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
216 for ("$_[1]\012") { 393 for ("$_[1]\012") {
217 # we support spaces in field names, as lotus domino 394 # we support spaces in field names, as lotus domino
218 # creates them. 395 # creates them (actually spaces around seperators
396 # are strictly allowed in http, they are a security issue).
219 $hdr{lc $1} .= ",$2" 397 $hdr{lc $1} .= "\x00$2"
220 while /\G 398 while /\G
221 ([^:\000-\037]+): 399 ([^:\000-\037]+):
222 [\011\040]* 400 [\011\040]*
223 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 401 ((?: [^\015\012]+ | \015?\012[\011\040] )*)
224 \015?\012 402 \015?\012
225 /gxc; 403 /gxc;
226 404
227 /\G$/ 405 /\G$/
228 or return $cb->(undef, { Status => 599, Reason => "garbled response headers" }); 406 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url }));
229 } 407 }
230 408
231 substr $_, 0, 1, "" 409 substr $_, 0, 1, ""
232 for values %hdr; 410 for values %hdr;
233 411
234 if (exists $hdr{"content-length"}) { 412 my $finish = sub {
235 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 413 # TODO: use destroy method, when/if available
236 # could cache persistent connection now 414 #$state{handle}->destroy;
237 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 415 $state{handle}->on_eof (undef);
238 # but we don't, due to misdesigns, this is annoyingly complex 416 $state{handle}->on_error (undef);
239 };
240
241 %state = (); 417 %state = ();
418
419 # set-cookie processing
420 if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
421 for (split /\x00/, $hdr{"set-cookie"}) {
422 my ($cookie, @arg) = split /;\s*/;
423 my ($name, $value) = split /=/, $cookie, 2;
424 my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
425
426 my $cdom;
427 my $cpath = (delete $kv{path}) || "/";
428
429 if (exists $kv{domain}) {
430 $cdom = delete $kv{domain};
431
432 $cdom =~ s/^\.?/./; # make sure it starts with a "."
433
434 next if $cdom =~ /\.$/;
435
436 # this is not rfc-like and not netscape-like. go figure.
437 my $ndots = $cdom =~ y/.//;
438 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
439 } else {
440 $cdom = $uhost;
441 }
442
443 # store it
444 $arg{cookie_jar}{version} = 1;
445 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
446 }
447 }
448
449 # microsoft and other shitheads don't give a shit for following standards,
450 # try to support some common forms of broken Location headers.
451 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
452 $_[1]{location} =~ s/^\.\/+//;
453
454 my $url = "$scheme://$uhost:$uport";
455
456 unless ($_[1]{location} =~ s/^\///) {
457 $url .= $upath;
458 $url =~ s/\/[^\/]*$//;
459 }
460
461 $_[1]{location} = "$url/$_[1]{location}";
462 }
463
464 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
465 # apparently, mozilla et al. just change POST to GET here
466 # more research is needed before we do the same
467 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
468 } elsif ($_[1]{Status} == 303 && $recurse) {
469 # even http/1.1 is unclear on how to mutate the method
470 $method = "GET" unless $method eq "HEAD";
471 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
472 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
473 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
474 } else {
242 $cb->($_[1], \%hdr); 475 $cb->($_[0], $_[1]);
476 }
243 }); 477 };
478
479 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") {
480 $finish->(undef, \%hdr);
244 } else { 481 } else {
482 if (exists $hdr{"content-length"}) {
483 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
484 # could cache persistent connection now
485 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
486 # but we don't, due to misdesigns, this is annoyingly complex
487 };
488
489 $finish->($_[1], \%hdr);
490 });
491 } else {
245 # too bad, need to read until we get an error or EOF, 492 # too bad, need to read until we get an error or EOF,
246 # no way to detect winged data. 493 # no way to detect winged data.
247 $_[0]->on_error (sub { 494 $_[0]->on_error (sub {
248 %state = ();
249 $cb->($_[0]{rbuf}, \%hdr); 495 $finish->($_[0]{rbuf}, \%hdr);
496 });
497 $_[0]->on_eof (undef);
498 $_[0]->on_read (sub { });
499 }
250 }); 500 }
251 $_[0]->on_eof (undef);
252 $_[0]->on_read (sub { });
253 } 501 });
254 }); 502 });
503 }, sub {
504 $timeout
255 }); 505 };
256 }, sub {
257 $timeout
258 }; 506 };
259 507
260 defined wantarray && AnyEvent::Util::guard { %state = () } 508 defined wantarray && AnyEvent::Util::guard { %state = () }
261} 509}
262 510
263sub http_get($$;@) { 511sub http_get($@) {
264 unshift @_, "GET"; 512 unshift @_, "GET";
265 &http_request 513 &http_request
266} 514}
267 515
516sub http_head($@) {
517 unshift @_, "HEAD";
518 &http_request
519}
520
521sub http_post($$@) {
522 my $url = shift;
523 unshift @_, "POST", $url, "body";
524 &http_request
525}
526
527=back
528
268=head2 GLOBAL FUNCTIONS AND VARIABLES 529=head2 GLOBAL FUNCTIONS AND VARIABLES
269 530
270=over 4 531=over 4
271 532
272=item AnyEvent::HTTP::set_proxy "proxy-url" 533=item AnyEvent::HTTP::set_proxy "proxy-url"
273 534
274Sets the default proxy server to use. The proxy-url must begin with a 535Sets the default proxy server to use. The proxy-url must begin with a
275string of the form C<http://host:port> (optionally C<https:...>). 536string of the form C<http://host:port> (optionally C<https:...>).
276 537
277=item $AnyEvent::HTTP::MAX_REDIRECTS 538=item $AnyEvent::HTTP::MAX_RECURSE
278 539
279The default value for the C<max_redirects> request parameter 540The default value for the C<recurse> request parameter (default: C<10>).
280(default: C<10>).
281 541
282=item $AnyEvent::HTTP::USERAGENT 542=item $AnyEvent::HTTP::USERAGENT
283 543
284The default value for the C<User-Agent> header (the default is 544The default value for the C<User-Agent> header (the default is
285C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 545C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
286 546
287=item $AnyEvent::HTTP::MAX_PERSISTENT 547=item $AnyEvent::HTTP::MAX_PERSISTENT
288 548
289The maximum number of persistent connections to keep open (default: 8). 549The maximum number of persistent connections to keep open (default: 8).
290 550
551Not implemented currently.
552
291=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT 553=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
292 554
293The maximum time to cache a persistent connection, in seconds (default: 2). 555The maximum time to cache a persistent connection, in seconds (default: 2).
556
557Not implemented currently.
558
559=item $AnyEvent::HTTP::ACTIVE
560
561The number of active connections. This is not the number of currently
562running requests, but the number of currently open and non-idle TCP
563connections. This number of can be useful for load-leveling.
294 564
295=back 565=back
296 566
297=cut 567=cut
298 568
… …
307 577
308L<AnyEvent>. 578L<AnyEvent>.
309 579
310=head1 AUTHOR 580=head1 AUTHOR
311 581
312 Marc Lehmann <schmorp@schmorp.de> 582 Marc Lehmann <schmorp@schmorp.de>
313 http://home.schmorp.de/ 583 http://home.schmorp.de/
314 584
315=cut 585=cut
316 586
3171 5871
318 588

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