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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 1.34 by root, Wed Oct 29 14:51:07 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 = '1.05';
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<$method> (e.g. C<GET>, C<POST>). The URL
60must be an absolute http or https URL. 92must be an absolute http or https URL.
93
94When called in void context, nothing is returned. In other contexts,
95C<http_request> returns a "cancellation guard" - you have to keep the
96object at least alive until the callback get called. If the object gets
97destroyed before the callbakc is called, the request will be cancelled.
61 98
62The callback will be called with the response data as first argument 99The callback will be called with the response data as first argument
63(or C<undef> if it wasn't available due to errors), and a hash-ref with 100(or C<undef> if it wasn't available due to errors), and a hash-ref with
64response headers as second argument. 101response headers as second argument.
65 102
66All the headers in that has are lowercased. In addition to the response 103All the headers in that hash are lowercased. In addition to the response
67headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and 104headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
68C<Reason> contain the three parts of the HTTP Status-Line of the same 105contain the three parts of the HTTP Status-Line of the same name. The
69name. 106pseudo-header C<URL> contains the original URL (which can differ from the
107requested URL when following redirects).
108
109If the server sends a header multiple times, then their contents will be
110joined together with a comma (C<,>), as per the HTTP spec.
70 111
71If an internal error occurs, such as not being able to resolve a hostname, 112If an internal error occurs, such as not being able to resolve a hostname,
72then C<$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($$) {
237 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
238
239 _slot_schedule $_[0];
240}
241
242our $qr_nl = qr<\015?\012>;
243our $qr_nlnl = qr<\015?\012\015?\012>;
244
108sub http_request($$$;@) { 245sub http_request($$@) {
109 my $cb = pop; 246 my $cb = pop;
110 my ($method, $url, %arg) = @_; 247 my ($method, $url, %arg) = @_;
111 248
112 my %hdr; 249 my %hdr;
113 250
251 $method = uc $method;
252
114 if (my $hdr = delete $arg{headers}) { 253 if (my $hdr = $arg{headers}) {
115 while (my ($k, $v) = each %$hdr) { 254 while (my ($k, $v) = each %$hdr) {
116 $hdr{lc $k} = $v; 255 $hdr{lc $k} = $v;
117 } 256 }
118 } 257 }
119 258
259 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
260
261 return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url })
262 if $recurse < 0;
263
120 my $proxy = $arg{proxy} || $PROXY; 264 my $proxy = $arg{proxy} || $PROXY;
121 my $timeout = $arg{timeout} || $TIMEOUT; 265 my $timeout = $arg{timeout} || $TIMEOUT;
122 266
123 $hdr{"user-agent"} ||= $USERAGENT; 267 $hdr{"user-agent"} ||= $USERAGENT;
124 268
125 my ($host, $port, $path, $scheme); 269 my ($uscheme, $uauthority, $upath, $query, $fragment) =
270 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
271
272 $uscheme = lc $uscheme;
273
274 my $uport = $uscheme eq "http" ? 80
275 : $uscheme eq "https" ? 443
276 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url });
277
278 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
279
280 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
281 or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url });
282
283 my $uhost = $1;
284 $uport = $2 if defined $2;
285
286 $uhost =~ s/^\[(.*)\]$/$1/;
287 $upath .= "?$query" if length $query;
288
289 $upath =~ s%^/?%/%;
290
291 # cookie processing
292 if (my $jar = $arg{cookie_jar}) {
293 %$jar = () if $jar->{version} != 1;
294
295 my @cookie;
296
297 while (my ($chost, $v) = each %$jar) {
298 if ($chost =~ /^\./) {
299 next unless $chost eq substr $uhost, -length $chost;
300 } elsif ($chost =~ /\./) {
301 next unless $chost eq $uhost;
302 } else {
303 next;
304 }
305
306 while (my ($cpath, $v) = each %$v) {
307 next unless $cpath eq substr $upath, 0, length $cpath;
308
309 while (my ($k, $v) = each %$v) {
310 next if $uscheme ne "https" && exists $v->{secure};
311 my $value = $v->{value};
312 $value =~ s/([\\"])/\\$1/g;
313 push @cookie, "$k=\"$value\"";
314 }
315 }
316 }
317
318 $hdr{cookie} = join "; ", @cookie
319 if @cookie;
320 }
321
322 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
126 323
127 if ($proxy) { 324 if ($proxy) {
128 ($host, $port, $scheme) = @$proxy; 325 ($rhost, $rport, $rscheme, $rpath) = (@$proxy, $url);
129 $path = $url; 326
327 # don't support https requests over https-proxy transport,
328 # can't be done with tls as spec'ed.
329 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
130 } else { 330 } else {
131 ($scheme, my $authority, $path, my $query, my $fragment) = 331 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $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;
150 } 332 }
151 333
152 $scheme = lc $scheme; 334 $hdr{host} = $uhost;
153
154 my %state;
155
156 my $body = "";
157 $state{body} = $body;
158
159 $hdr{"content-length"} = length $body; 335 $hdr{"content-length"} = length $arg{body};
160 336
337 my %state = (connect_guard => 1);
338
339 _get_slot $uhost, sub {
340 $state{slot_guard} = shift;
341
342 return unless $state{connect_guard};
343
161 $state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub { 344 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
162 $state{fh} = shift 345 $state{fh} = shift
163 or return $cb->(undef, { Status => 599, Reason => "$!" }); 346 or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url });
347 pop; # free memory, save a tree
164 348
165 delete $state{connect_guard}; # reduce memory usage, save a tree 349 return unless delete $state{connect_guard};
166 350
167 # get handle 351 # get handle
168 $state{handle} = new AnyEvent::Handle 352 $state{handle} = new AnyEvent::Handle
169 fh => $state{fh}, 353 fh => $state{fh},
170 ($scheme eq "https" ? (tls => "connect") : ()); 354 timeout => $timeout;
171 355
172 # limit the number of persistent connections 356 # limit the number of persistent connections
357 # keepalive not yet supported
173 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 358 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
174 ++$KA_COUNT{$_[1]}; 359 ++$KA_COUNT{$_[1]};
175 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 360 $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
361 --$KA_COUNT{$_[1]}
362 };
176 $hdr{connection} = "keep-alive"; 363 $hdr{connection} = "keep-alive";
177 delete $hdr{connection}; # keep-alive not yet supported
178 } else { 364 } else {
179 delete $hdr{connection}; 365 delete $hdr{connection};
180 } 366 }
181 367
182 # (re-)configure handle 368 # (re-)configure handle
183 $state{handle}->timeout ($timeout);
184 $state{handle}->on_error (sub { 369 $state{handle}->on_error (sub {
370 my $errno = "$!";
185 %state = (); 371 %state = ();
186 $cb->(undef, { Status => 599, Reason => "$!" }); 372 $cb->(undef, { Status => 599, Reason => $errno, URL => $url });
187 }); 373 });
188 $state{handle}->on_eof (sub { 374 $state{handle}->on_eof (sub {
189 %state = (); 375 %state = ();
190 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" }); 376 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url });
191 });
192
193 # send request
194 $state{handle}->push_write (
195 "\U$method\E $path HTTP/1.0\015\012"
196 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
197 . "\015\012"
198 . (delete $state{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 ); 377 });
213 378
379 $state{handle}->starttls ("connect") if $rscheme eq "https";
380
381 # handle actual, non-tunneled, request
382 my $handle_actual_request = sub {
383 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
384
385 # send request
386 $state{handle}->push_write (
387 "$method $rpath HTTP/1.0\015\012"
388 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
389 . "\015\012"
390 . (delete $arg{body})
391 );
392
393 %hdr = (); # reduce memory usage, save a kitten
394
395 # status line
396 $state{handle}->push_read (line => $qr_nl, sub {
397 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
398 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url }));
399
400 my %hdr = ( # response headers
401 HTTPVersion => ",$1",
402 Status => ",$2",
403 Reason => ",$3",
404 URL => ",$url"
405 );
406
214 # headers, could be optimized a bit 407 # headers, could be optimized a bit
215 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 408 $state{handle}->unshift_read (line => $qr_nlnl, sub {
216 for ("$_[1]\012") { 409 for ("$_[1]\012") {
410 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
411
217 # we support spaces in field names, as lotus domino 412 # we support spaces in field names, as lotus domino
218 # creates them. 413 # creates them (actually spaces around seperators
414 # are strictly allowed in http, they are a security issue).
219 $hdr{lc $1} .= ",$2" 415 $hdr{lc $1} .= ",$2"
220 while /\G 416 while /\G
221 ([^:\000-\037]+): 417 ([^:\000-\037]+):
222 [\011\040]* 418 [\011\040]*
223 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 419 ((?: [^\012]+ | \012[\011\040] )*)
224 \015?\012 420 \012
225 /gxc; 421 /gxc;
226 422
227 /\G$/ 423 /\G$/
228 or return $cb->(undef, { Status => 599, Reason => "garbled response headers" }); 424 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url }));
229 } 425 }
230 426
231 substr $_, 0, 1, "" 427 substr $_, 0, 1, ""
232 for values %hdr; 428 for values %hdr;
233 429
234 if (exists $hdr{"content-length"}) { 430 my $finish = sub {
235 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 431 # TODO: use destroy method, when/if available
236 # could cache persistent connection now 432 #$state{handle}->destroy;
237 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 433 $state{handle}->on_eof (undef);
238 # but we don't, due to misdesigns, this is annoyingly complex 434 $state{handle}->on_error (undef);
435 %state = ();
436
437 # set-cookie processing
438 if ($arg{cookie_jar}) {
439 for ($hdr{"set-cookie"}) {
440 # parse NAME=VALUE
441 my @kv;
442
443 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
444 my $name = $1;
445 my $value = $3;
446
447 unless ($value) {
448 $value = $2;
449 $value =~ s/\\(.)/$1/gs;
450 }
451
452 push @kv, $name => $value;
453
454 last unless /\G\s*;/gc;
455 }
456
457 last unless @kv;
458
459 my $name = shift @kv;
460 my %kv = (value => shift @kv, @kv);
461
462 my $cdom;
463 my $cpath = (delete $kv{path}) || "/";
464
465 if (exists $kv{domain}) {
466 $cdom = delete $kv{domain};
467
468 $cdom =~ s/^\.?/./; # make sure it starts with a "."
469
470 next if $cdom =~ /\.$/;
471
472 # this is not rfc-like and not netscape-like. go figure.
473 my $ndots = $cdom =~ y/.//;
474 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
475 } else {
476 $cdom = $uhost;
477 }
478
479 # store it
480 $arg{cookie_jar}{version} = 1;
481 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
482
483 redo if /\G\s*,/gc;
484 }
485 }
486
487 # microsoft and other shitheads don't give a shit for following standards,
488 # try to support some common forms of broken Location headers.
489 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
490 $_[1]{location} =~ s/^\.\/+//;
491
492 my $url = "$rscheme://$uhost:$uport";
493
494 unless ($_[1]{location} =~ s/^\///) {
495 $url .= $upath;
496 $url =~ s/\/[^\/]*$//;
497 }
498
499 $_[1]{location} = "$url/$_[1]{location}";
500 }
501
502 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
503 # apparently, mozilla et al. just change POST to GET here
504 # more research is needed before we do the same
505 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
506 } elsif ($_[1]{Status} == 303 && $recurse) {
507 # even http/1.1 is unclear on how to mutate the method
508 $method = "GET" unless $method eq "HEAD";
509 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
510 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
511 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
512 } else {
513 $cb->($_[0], $_[1]);
514 }
239 }; 515 };
240 516
517 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") {
518 $finish->(undef, \%hdr);
519 } else {
520 if (exists $hdr{"content-length"}) {
521 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
522 # could cache persistent connection now
523 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
524 # but we don't, due to misdesigns, this is annoyingly complex
525 };
526
527 $finish->($_[1], \%hdr);
528 });
529 } else {
530 # too bad, need to read until we get an error or EOF,
531 # no way to detect winged data.
532 $_[0]->on_error (sub {
533 $finish->($_[0]{rbuf}, \%hdr);
534 });
535 $_[0]->on_eof (undef);
536 $_[0]->on_read (sub { });
537 }
538 }
539 });
540 });
541 };
542
543 # now handle proxy-CONNECT method
544 if ($proxy && $uscheme eq "https") {
545 # oh dear, we have to wrap it into a connect request
546
547 # maybe re-use $uauthority with patched port?
548 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
549 $state{handle}->push_read (line => $qr_nlnl, sub {
550 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
551 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid proxy connect response ($_[1])", URL => $url }));
552
553 if ($2 == 200) {
554 $rpath = $upath;
555 &$handle_actual_request;
556 } else {
241 %state = (); 557 %state = ();
242 $cb->($_[1], \%hdr); 558 $cb->(undef, { Status => $2, Reason => $3, URL => $url });
243 }); 559 }
244 } else {
245 # too bad, need to read until we get an error or EOF,
246 # no way to detect winged data.
247 $_[0]->on_error (sub {
248 %state = ();
249 $cb->($_[0]{rbuf}, \%hdr);
250 });
251 $_[0]->on_eof (undef);
252 $_[0]->on_read (sub { });
253 } 560 });
561 } else {
562 &$handle_actual_request;
254 }); 563 }
564
565 }, sub {
566 $timeout
255 }); 567 };
256 }, sub {
257 $timeout
258 }; 568 };
259 569
260 defined wantarray && AnyEvent::Util::guard { %state = () } 570 defined wantarray && AnyEvent::Util::guard { %state = () }
261} 571}
262 572
263sub http_get($$;@) { 573sub http_get($@) {
264 unshift @_, "GET"; 574 unshift @_, "GET";
265 &http_request 575 &http_request
266} 576}
267 577
578sub http_head($@) {
579 unshift @_, "HEAD";
580 &http_request
581}
582
583sub http_post($$@) {
584 my $url = shift;
585 unshift @_, "POST", $url, "body";
586 &http_request
587}
588
589=back
590
268=head2 GLOBAL FUNCTIONS AND VARIABLES 591=head2 GLOBAL FUNCTIONS AND VARIABLES
269 592
270=over 4 593=over 4
271 594
272=item AnyEvent::HTTP::set_proxy "proxy-url" 595=item AnyEvent::HTTP::set_proxy "proxy-url"
273 596
274Sets the default proxy server to use. The proxy-url must begin with a 597Sets the default proxy server to use. The proxy-url must begin with a
275string of the form C<http://host:port> (optionally C<https:...>). 598string of the form C<http://host:port> (optionally C<https:...>).
276 599
277=item $AnyEvent::HTTP::MAX_REDIRECTS 600=item $AnyEvent::HTTP::MAX_RECURSE
278 601
279The default value for the C<max_redirects> request parameter 602The default value for the C<recurse> request parameter (default: C<10>).
280(default: C<10>).
281 603
282=item $AnyEvent::HTTP::USERAGENT 604=item $AnyEvent::HTTP::USERAGENT
283 605
284The default value for the C<User-Agent> header (the default is 606The default value for the C<User-Agent> header (the default is
285C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 607C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
286 608
287=item $AnyEvent::HTTP::MAX_PERSISTENT 609=item $AnyEvent::HTTP::MAX_PERSISTENT
288 610
289The maximum number of persistent connections to keep open (default: 8). 611The maximum number of persistent connections to keep open (default: 8).
290 612
613Not implemented currently.
614
291=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT 615=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
292 616
293The maximum time to cache a persistent connection, in seconds (default: 2). 617The maximum time to cache a persistent connection, in seconds (default: 2).
618
619Not implemented currently.
620
621=item $AnyEvent::HTTP::ACTIVE
622
623The number of active connections. This is not the number of currently
624running requests, but the number of currently open and non-idle TCP
625connections. This number of can be useful for load-leveling.
294 626
295=back 627=back
296 628
297=cut 629=cut
298 630
… …
307 639
308L<AnyEvent>. 640L<AnyEvent>.
309 641
310=head1 AUTHOR 642=head1 AUTHOR
311 643
312 Marc Lehmann <schmorp@schmorp.de> 644 Marc Lehmann <schmorp@schmorp.de>
313 http://home.schmorp.de/ 645 http://home.schmorp.de/
314 646
315=cut 647=cut
316 648
3171 6491
318 650

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