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Comparing AnyEvent-HTTP/HTTP.pm (file contents):
Revision 1.8 by root, Wed Jun 4 12:32:30 2008 UTC vs.
Revision 1.40 by root, Sun Jul 5 01:45:01 2009 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.
13 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.
32
14=head2 METHODS 33=head2 METHODS
15 34
16=over 4 35=over 4
17 36
18=cut 37=cut
… …
22use strict; 41use strict;
23no warnings; 42no warnings;
24 43
25use Carp; 44use Carp;
26 45
27use AnyEvent (); 46use AnyEvent 4.452 ();
28use AnyEvent::Util (); 47use AnyEvent::Util ();
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 = '1.12';
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 $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
39our $MAX_RECURSE = 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.
56 77
57=item http_head $url, key => value..., $cb->($data, $headers) 78=item http_head $url, key => value..., $cb->($data, $headers)
58 79
59Executes an HTTP-HEAD request. See the http_request function for details on 80Executes an HTTP-HEAD request. See the http_request function for details
60additional parameters. 81on additional parameters and the return value.
61 82
62=item http_post $url, $body, key => value..., $cb->($data, $headers) 83=item http_post $url, $body, key => value..., $cb->($data, $headers)
63 84
64Executes an HTTP-POST request with a request body of C<$bod>. See the 85Executes an HTTP-POST request with a request body of C<$body>. See the
65http_request function for details on additional parameters. 86http_request function for details on additional parameters and the return
87value.
66 88
67=item http_request $method => $url, key => value..., $cb->($data, $headers) 89=item http_request $method => $url, key => value..., $cb->($data, $headers)
68 90
69Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL 91Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
70must be an absolute http or https URL. 92must be an absolute http or https URL.
93
94When called in void context, nothing is returned. In other contexts,
95C<http_request> returns a "cancellation guard" - you have to keep the
96object at least alive until the callback get called. If the object gets
97destroyed before the callbakc is called, the request will be cancelled.
71 98
72The callback will be called with the response data as first argument 99The callback will be called with the response data as first argument
73(or C<undef> if it wasn't available due to errors), and a hash-ref with 100(or C<undef> if it wasn't available due to errors), and a hash-ref with
74response headers as second argument. 101response headers as second argument.
75 102
76All the headers in that hash are lowercased. In addition to the response 103All the headers in that hash are lowercased. In addition to the response
77headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and 104headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason>
78C<Reason> contain the three parts of the HTTP Status-Line of the same 105contain the three parts of the HTTP Status-Line of the same name. The
79name. 106pseudo-header C<URL> contains the original URL (which can differ from the
107requested URL when following redirects).
108
109If the server sends a header multiple times, then their contents will be
110joined together with a comma (C<,>), as per the HTTP spec.
80 111
81If an internal error occurs, such as not being able to resolve a hostname, 112If an internal error occurs, such as not being able to resolve a hostname,
82then C<$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>
83and the C<Reason> pseudo-header will contain an error message. 114and the C<Reason> pseudo-header will contain an error message.
84 115
… …
104Whether to recurse requests or not, e.g. on redirects, authentication 135Whether to recurse requests or not, e.g. on redirects, authentication
105retries and so on, and how often to do so. 136retries and so on, and how often to do so.
106 137
107=item headers => hashref 138=item headers => hashref
108 139
109The 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:>.
110 143
111=item timeout => $seconds 144=item timeout => $seconds
112 145
113The 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
114the 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.
… …
124=item body => $string 157=item body => $string
125 158
126The request body, usually empty. Will be-sent as-is (future versions of 159The request body, usually empty. Will be-sent as-is (future versions of
127this module might offer more options). 160this module might offer more options).
128 161
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 expiry 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
178=item tls_ctx => $scheme | $tls_ctx
179
180Specifies the AnyEvent::TLS context to be used for https connections. This
181parameter follows the same rules as the C<tls_ctx> parameter to
182L<AnyEvent::Handle>, but additionally, the two strings C<low> or
183C<high> can be specified, which give you a predefined low-security (no
184verification, highest compatibility) and high-security (CA and common-name
185verification) TLS context.
186
187The default for this option is C<low>, which could be interpreted as "give
188me the page, no matter what".
189
129=back 190=back
130 191
131=back 192Example: make a simple HTTP GET request for http://www.nethype.de/
193
194 http_request GET => "http://www.nethype.de/", sub {
195 my ($body, $hdr) = @_;
196 print "$body\n";
197 };
198
199Example: make a HTTP HEAD request on https://www.google.com/, use a
200timeout of 30 seconds.
201
202 http_request
203 GET => "https://www.google.com",
204 timeout => 30,
205 sub {
206 my ($body, $hdr) = @_;
207 use Data::Dumper;
208 print Dumper $hdr;
209 }
210 ;
211
212Example: make another simple HTTP GET request, but immediately try to
213cancel it.
214
215 my $request = http_request GET => "http://www.nethype.de/", sub {
216 my ($body, $hdr) = @_;
217 print "$body\n";
218 };
219
220 undef $request;
132 221
133=cut 222=cut
134 223
224sub _slot_schedule;
225sub _slot_schedule($) {
226 my $host = shift;
227
228 while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
229 if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
230 # somebody wants that slot
231 ++$CO_SLOT{$host}[0];
232 ++$ACTIVE;
233
234 $cb->(AnyEvent::Util::guard {
235 --$ACTIVE;
236 --$CO_SLOT{$host}[0];
237 _slot_schedule $host;
238 });
239 } else {
240 # nobody wants the slot, maybe we can forget about it
241 delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
242 last;
243 }
244 }
245}
246
247# wait for a free slot on host, call callback
248sub _get_slot($$) {
249 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
250
251 _slot_schedule $_[0];
252}
253
254our $qr_nl = qr<\015?\012>;
255our $qr_nlnl = qr<\015?\012\015?\012>;
256
257our $TLS_CTX_LOW = { cache => 1, dh => undef, sslv2 => 1 };
258our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_cn => "https", dh => "skip4096" };
259
135sub http_request($$$;@) { 260sub http_request($$@) {
136 my $cb = pop; 261 my $cb = pop;
137 my ($method, $url, %arg) = @_; 262 my ($method, $url, %arg) = @_;
138 263
139 my %hdr; 264 my %hdr;
265
266 $arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx};
267 $arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high";
140 268
141 $method = uc $method; 269 $method = uc $method;
142 270
143 if (my $hdr = $arg{headers}) { 271 if (my $hdr = $arg{headers}) {
144 while (my ($k, $v) = each %$hdr) { 272 while (my ($k, $v) = each %$hdr) {
145 $hdr{lc $k} = $v; 273 $hdr{lc $k} = $v;
146 } 274 }
147 } 275 }
148 276
149 my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE; 277 my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE;
150 278
151 return $cb->(undef, { Status => 599, Reason => "recursion limit reached" }) 279 return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url })
152 if $recurse < 0; 280 if $recurse < 0;
153 281
154 my $proxy = $arg{proxy} || $PROXY; 282 my $proxy = $arg{proxy} || $PROXY;
155 my $timeout = $arg{timeout} || $TIMEOUT; 283 my $timeout = $arg{timeout} || $TIMEOUT;
156 284
157 $hdr{"user-agent"} ||= $USERAGENT; 285 $hdr{"user-agent"} ||= $USERAGENT;
158 286
159 my ($host, $port, $path, $scheme); 287 my ($uscheme, $uauthority, $upath, $query, $fragment) =
288 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
289
290 $uscheme = lc $uscheme;
291
292 my $uport = $uscheme eq "http" ? 80
293 : $uscheme eq "https" ? 443
294 : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported (not '$uscheme')", URL => $url });
295
296 $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic
297
298 $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
299 or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url });
300
301 my $uhost = $1;
302 $uport = $2 if defined $2;
303
304 $uhost =~ s/^\[(.*)\]$/$1/;
305 $upath .= "?$query" if length $query;
306
307 $upath =~ s%^/?%/%;
308
309 # cookie processing
310 if (my $jar = $arg{cookie_jar}) {
311 %$jar = () if $jar->{version} != 1;
312
313 my @cookie;
314
315 while (my ($chost, $v) = each %$jar) {
316 if ($chost =~ /^\./) {
317 next unless $chost eq substr $uhost, -length $chost;
318 } elsif ($chost =~ /\./) {
319 next unless $chost eq $uhost;
320 } else {
321 next;
322 }
323
324 while (my ($cpath, $v) = each %$v) {
325 next unless $cpath eq substr $upath, 0, length $cpath;
326
327 while (my ($k, $v) = each %$v) {
328 next if $uscheme ne "https" && exists $v->{secure};
329 my $value = $v->{value};
330 $value =~ s/([\\"])/\\$1/g;
331 push @cookie, "$k=\"$value\"";
332 }
333 }
334 }
335
336 $hdr{cookie} = join "; ", @cookie
337 if @cookie;
338 }
339
340 my ($rhost, $rport, $rscheme, $rpath); # request host, port, path
160 341
161 if ($proxy) { 342 if ($proxy) {
162 ($host, $port, $scheme) = @$proxy; 343 ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy);
163 $path = $url; 344
345 # don't support https requests over https-proxy transport,
346 # can't be done with tls as spec'ed, unless you double-encrypt.
347 $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https";
164 } else { 348 } else {
165 ($scheme, my $authority, $path, my $query, my $fragment) = 349 ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath);
166 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
167
168 $port = $scheme eq "http" ? 80
169 : $scheme eq "https" ? 443
170 : return $cb->(undef, { Status => 599, Reason => "$url: only http and https URLs supported" });
171
172 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
173 or return $cb->(undef, { Status => 599, Reason => "$url: unparsable URL" });
174
175 $host = $1;
176 $port = $2 if defined $2;
177
178 $host =~ s/^\[(.*)\]$/$1/;
179 $path .= "?$query" if length $query;
180
181 $path = "/" unless $path;
182
183 $hdr{host} = $host = lc $host;
184 } 350 }
185 351
186 $scheme = lc $scheme; 352 $hdr{host} = $uhost;
187
188 my %state;
189
190 $hdr{"content-length"} = length $arg{body}; 353 $hdr{"content-length"} = length $arg{body};
191 354
355 my %state = (connect_guard => 1);
356
357 _get_slot $uhost, sub {
358 $state{slot_guard} = shift;
359
360 return unless $state{connect_guard};
361
192 $state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub { 362 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
193 $state{fh} = shift 363 $state{fh} = shift
194 or return $cb->(undef, { Status => 599, Reason => "$!" }); 364 or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url }));
365 pop; # free memory, save a tree
195 366
196 delete $state{connect_guard}; # reduce memory usage, save a tree 367 return unless delete $state{connect_guard};
197 368
198 # get handle 369 # get handle
199 $state{handle} = new AnyEvent::Handle 370 $state{handle} = new AnyEvent::Handle
200 fh => $state{fh}, 371 fh => $state{fh},
201 ($scheme eq "https" ? (tls => "connect") : ()); 372 timeout => $timeout,
373 peername => $rhost,
374 tls_ctx => $arg{tls_ctx};
202 375
203 # limit the number of persistent connections 376 # limit the number of persistent connections
377 # keepalive not yet supported
204 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 378 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
205 ++$KA_COUNT{$_[1]}; 379 ++$KA_COUNT{$_[1]};
206 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 380 $state{handle}{ka_count_guard} = AnyEvent::Util::guard {
381 --$KA_COUNT{$_[1]}
382 };
207 $hdr{connection} = "keep-alive"; 383 $hdr{connection} = "keep-alive";
208 delete $hdr{connection}; # keep-alive not yet supported
209 } else { 384 } else {
210 delete $hdr{connection}; 385 delete $hdr{connection};
211 } 386 }
212 387
213 # (re-)configure handle 388 # (re-)configure handle
214 $state{handle}->timeout ($timeout);
215 $state{handle}->on_error (sub { 389 $state{handle}->on_error (sub {
216 %state = (); 390 %state = ();
217 $cb->(undef, { Status => 599, Reason => "$!" }); 391 $cb->(undef, { Status => 599, Reason => $_[2], URL => $url });
218 }); 392 });
219 $state{handle}->on_eof (sub { 393 $state{handle}->on_eof (sub {
220 %state = (); 394 %state = ();
221 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" }); 395 $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url });
222 });
223
224 # send request
225 $state{handle}->push_write (
226 "$method $path HTTP/1.0\015\012"
227 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
228 . "\015\012"
229 . (delete $arg{body})
230 );
231
232 %hdr = (); # reduce memory usage, save a kitten
233
234 # status line
235 $state{handle}->push_read (line => qr/\015?\012/, sub {
236 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
237 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
238
239 my %hdr = ( # response headers
240 HTTPVersion => ",$1",
241 Status => ",$2",
242 Reason => ",$3",
243 ); 396 });
244 397
398 $state{handle}->starttls ("connect") if $rscheme eq "https";
399
400 # handle actual, non-tunneled, request
401 my $handle_actual_request = sub {
402 $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls};
403
404 # send request
405 $state{handle}->push_write (
406 "$method $rpath HTTP/1.0\015\012"
407 . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr)
408 . "\015\012"
409 . (delete $arg{body})
410 );
411
412 %hdr = (); # reduce memory usage, save a kitten
413
414 # status line
415 $state{handle}->push_read (line => $qr_nl, sub {
416 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
417 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url }));
418
419 my %hdr = ( # response headers
420 HTTPVersion => ",$1",
421 Status => ",$2",
422 Reason => ",$3",
423 URL => ",$url"
424 );
425
245 # headers, could be optimized a bit 426 # headers, could be optimized a bit
246 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 427 $state{handle}->unshift_read (line => $qr_nlnl, sub {
247 for ("$_[1]\012") { 428 for ("$_[1]\012") {
248 # we support spaces in field names, as lotus domino 429 y/\015//d; # weed out any \015, as they show up in the weirdest of places.
249 # creates them. 430
431 # things seen, not parsed:
432 # p3pP="NON CUR OTPi OUR NOR UNI"
433
250 $hdr{lc $1} .= ",$2" 434 $hdr{lc $1} .= ",$2"
251 while /\G 435 while /\G
252 ([^:\000-\037]+): 436 ([^:\000-\037]+):
253 [\011\040]* 437 [\011\040]*
254 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 438 ((?: [^\012]+ | \012[\011\040] )*)
255 \015?\012 439 \012
256 /gxc; 440 /gxc;
257 441
258 /\G$/ 442 /\G$/
259 or return $cb->(undef, { Status => 599, Reason => "garbled response headers" }); 443 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url }));
260 } 444 }
261 445
262 substr $_, 0, 1, "" 446 substr $_, 0, 1, ""
263 for values %hdr; 447 for values %hdr;
264 448
265 my $finish = sub { 449 my $finish = sub {
450 $state{handle}->destroy;
451 %state = ();
452
453 # set-cookie processing
454 if ($arg{cookie_jar}) {
455 for ($hdr{"set-cookie"}) {
456 # parse NAME=VALUE
457 my @kv;
458
459 while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) {
460 my $name = $1;
461 my $value = $3;
462
463 unless ($value) {
464 $value = $2;
465 $value =~ s/\\(.)/$1/gs;
466 }
467
468 push @kv, $name => $value;
469
470 last unless /\G\s*;/gc;
471 }
472
473 last unless @kv;
474
475 my $name = shift @kv;
476 my %kv = (value => shift @kv, @kv);
477
478 my $cdom;
479 my $cpath = (delete $kv{path}) || "/";
480
481 if (exists $kv{domain}) {
482 $cdom = delete $kv{domain};
483
484 $cdom =~ s/^\.?/./; # make sure it starts with a "."
485
486 next if $cdom =~ /\.$/;
487
488 # this is not rfc-like and not netscape-like. go figure.
489 my $ndots = $cdom =~ y/.//;
490 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
491 } else {
492 $cdom = $uhost;
493 }
494
495 # store it
496 $arg{cookie_jar}{version} = 1;
497 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
498
499 redo if /\G\s*,/gc;
500 }
501 }
502
503 # microsoft and other shitheads don't give a shit for following standards,
504 # try to support some common forms of broken Location headers.
505 if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) {
506 $_[1]{location} =~ s/^\.\/+//;
507
508 my $url = "$rscheme://$uhost:$uport";
509
510 unless ($_[1]{location} =~ s/^\///) {
511 $url .= $upath;
512 $url =~ s/\/[^\/]*$//;
513 }
514
515 $_[1]{location} = "$url/$_[1]{location}";
516 }
517
266 if ($_[1]{Status} =~ /^30[12]$/ && $recurse) { 518 if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") {
519 # apparently, mozilla et al. just change POST to GET here
520 # more research is needed before we do the same
267 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb); 521 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
522 } elsif ($_[1]{Status} == 303 && $recurse) {
523 # even http/1.1 is unclear on how to mutate the method
524 $method = "GET" unless $method eq "HEAD";
525 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
526 } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) {
527 http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
528 } else {
529 $cb->($_[0], $_[1]);
530 }
531 };
532
533 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") {
534 $finish->(undef, \%hdr);
535 } else {
536 if (exists $hdr{"content-length"}) {
537 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
538 # could cache persistent connection now
539 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
540 # but we don't, due to misdesigns, this is annoyingly complex
541 };
542
543 $finish->($_[1], \%hdr);
544 });
545 } else {
546 # too bad, need to read until we get an error or EOF,
547 # no way to detect winged data.
548 $_[0]->on_error (sub {
549 # delete ought to be more efficient, as we would have to make
550 # a copy otherwise as $_[0] gets destroyed.
551 $finish->(delete $_[0]{rbuf}, \%hdr);
552 });
553 $_[0]->on_eof (undef);
554 $_[0]->on_read (sub { });
555 }
556 }
557 });
558 });
559 };
560
561 # now handle proxy-CONNECT method
562 if ($proxy && $uscheme eq "https") {
563 # oh dear, we have to wrap it into a connect request
564
565 # maybe re-use $uauthority with patched port?
566 $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012");
567 $state{handle}->push_read (line => $qr_nlnl, sub {
568 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix
569 or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url }));
570
571 if ($2 == 200) {
572 $rpath = $upath;
573 &$handle_actual_request;
268 } else { 574 } else {
269 $cb->($_[0], $_[1]); 575 %state = ();
576 $cb->(undef, { Status => $2, Reason => $3, URL => $url });
270 } 577 }
271 }; 578 });
272
273 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") {
274 %state = ();
275 $finish->(undef, \%hdr);
276 } else { 579 } else {
277 if (exists $hdr{"content-length"}) { 580 &$handle_actual_request;
278 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
279 # could cache persistent connection now
280 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
281 # but we don't, due to misdesigns, this is annoyingly complex
282 };
283
284 %state = ();
285 $finish->($_[1], \%hdr);
286 });
287 } else {
288 # too bad, need to read until we get an error or EOF,
289 # no way to detect winged data.
290 $_[0]->on_error (sub {
291 %state = ();
292 $finish->($_[0]{rbuf}, \%hdr);
293 });
294 $_[0]->on_eof (undef);
295 $_[0]->on_read (sub { });
296 }
297 }
298 }); 581 }
582
583 }, sub {
584 $timeout
299 }); 585 };
300 }, sub {
301 $timeout
302 }; 586 };
303 587
304 defined wantarray && AnyEvent::Util::guard { %state = () } 588 defined wantarray && AnyEvent::Util::guard { %state = () }
305} 589}
306 590
307sub http_get($$;@) { 591sub http_get($@) {
308 unshift @_, "GET"; 592 unshift @_, "GET";
309 &http_request 593 &http_request
310} 594}
311 595
312sub http_head($$;@) { 596sub http_head($@) {
313 unshift @_, "HEAD"; 597 unshift @_, "HEAD";
314 &http_request 598 &http_request
315} 599}
316 600
317sub http_post($$$;@) { 601sub http_post($$@) {
602 my $url = shift;
318 unshift @_, "POST", "body"; 603 unshift @_, "POST", $url, "body";
319 &http_request 604 &http_request
320} 605}
321 606
607=back
608
322=head2 GLOBAL FUNCTIONS AND VARIABLES 609=head2 GLOBAL FUNCTIONS AND VARIABLES
323 610
324=over 4 611=over 4
325 612
326=item AnyEvent::HTTP::set_proxy "proxy-url" 613=item AnyEvent::HTTP::set_proxy "proxy-url"
… …
333The default value for the C<recurse> request parameter (default: C<10>). 620The default value for the C<recurse> request parameter (default: C<10>).
334 621
335=item $AnyEvent::HTTP::USERAGENT 622=item $AnyEvent::HTTP::USERAGENT
336 623
337The default value for the C<User-Agent> header (the default is 624The default value for the C<User-Agent> header (the default is
338C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). 625C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>).
339 626
340=item $AnyEvent::HTTP::MAX_PERSISTENT 627=item $AnyEvent::HTTP::MAX_PERSISTENT
341 628
342The maximum number of persistent connections to keep open (default: 8). 629The maximum number of persistent connections to keep open (default: 8).
343 630
… …
346=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT 633=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT
347 634
348The maximum time to cache a persistent connection, in seconds (default: 2). 635The maximum time to cache a persistent connection, in seconds (default: 2).
349 636
350Not implemented currently. 637Not implemented currently.
638
639=item $AnyEvent::HTTP::ACTIVE
640
641The number of active connections. This is not the number of currently
642running requests, but the number of currently open and non-idle TCP
643connections. This number of can be useful for load-leveling.
351 644
352=back 645=back
353 646
354=cut 647=cut
355 648
… …
364 657
365L<AnyEvent>. 658L<AnyEvent>.
366 659
367=head1 AUTHOR 660=head1 AUTHOR
368 661
369 Marc Lehmann <schmorp@schmorp.de> 662 Marc Lehmann <schmorp@schmorp.de>
370 http://home.schmorp.de/ 663 http://home.schmorp.de/
664
665With many thanks to Дмитрий Шалашов, who provided countless
666testcases and bugreports.
371 667
372=cut 668=cut
373 669
3741 6701
375 671

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