… | |
… | |
15 | This module is an L<AnyEvent> user, you need to make sure that you use and |
15 | This module is an L<AnyEvent> user, you need to make sure that you use and |
16 | run a supported event loop. |
16 | run a supported event loop. |
17 | |
17 | |
18 | This module implements a simple, stateless and non-blocking HTTP |
18 | This module implements a simple, stateless and non-blocking HTTP |
19 | client. It supports GET, POST and other request methods, cookies and more, |
19 | client. It supports GET, POST and other request methods, cookies and more, |
20 | all on a very low level. It can follow redirects supports proxies and |
20 | all on a very low level. It can follow redirects, supports proxies, and |
21 | automatically limits the number of connections to the values specified in |
21 | automatically limits the number of connections to the values specified in |
22 | the RFC. |
22 | the RFC. |
23 | |
23 | |
24 | It should generally be a "good client" that is enough for most HTTP |
24 | It should generally be a "good client" that is enough for most HTTP |
25 | tasks. Simple tasks should be simple, but complex tasks should still be |
25 | tasks. Simple tasks should be simple, but complex tasks should still be |
… | |
… | |
36 | |
36 | |
37 | =cut |
37 | =cut |
38 | |
38 | |
39 | package AnyEvent::HTTP; |
39 | package AnyEvent::HTTP; |
40 | |
40 | |
41 | use strict; |
41 | use common::sense; |
42 | no warnings; |
|
|
43 | |
42 | |
44 | use Errno (); |
43 | use Errno (); |
45 | |
44 | |
46 | use AnyEvent 5.0 (); |
45 | use AnyEvent 5.0 (); |
47 | use AnyEvent::Util (); |
46 | use AnyEvent::Util (); |
48 | use AnyEvent::Handle (); |
47 | use AnyEvent::Handle (); |
49 | |
48 | |
50 | use base Exporter::; |
49 | use base Exporter::; |
51 | |
50 | |
52 | our $VERSION = '1.5'; |
51 | our $VERSION = '2.03'; |
53 | |
52 | |
54 | our @EXPORT = qw(http_get http_post http_head http_request); |
53 | our @EXPORT = qw(http_get http_post http_head http_request); |
55 | |
54 | |
56 | our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
55 | our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
57 | our $MAX_RECURSE = 10; |
56 | our $MAX_RECURSE = 10; |
58 | our $MAX_PERSISTENT = 8; |
|
|
59 | our $PERSISTENT_TIMEOUT = 2; |
57 | our $PERSISTENT_TIMEOUT = 3; |
60 | our $TIMEOUT = 300; |
58 | our $TIMEOUT = 300; |
61 | |
59 | our $MAX_PER_HOST = 4; # changing this is evil |
62 | # changing these is evil |
|
|
63 | our $MAX_PERSISTENT_PER_HOST = 0; |
|
|
64 | our $MAX_PER_HOST = 4; |
|
|
65 | |
60 | |
66 | our $PROXY; |
61 | our $PROXY; |
67 | our $ACTIVE = 0; |
62 | our $ACTIVE = 0; |
68 | |
63 | |
69 | my %KA_COUNT; # number of open keep-alive connections per host |
64 | my %KA_CACHE; # indexed by uhost currently, points to [$handle...] array |
70 | my %CO_SLOT; # number of open connections, and wait queue, per host |
65 | my %CO_SLOT; # number of open connections, and wait queue, per host |
71 | |
66 | |
72 | =item http_get $url, key => value..., $cb->($data, $headers) |
67 | =item http_get $url, key => value..., $cb->($data, $headers) |
73 | |
68 | |
74 | Executes an HTTP-GET request. See the http_request function for details on |
69 | Executes an HTTP-GET request. See the http_request function for details on |
… | |
… | |
94 | C<http_request> returns a "cancellation guard" - you have to keep the |
89 | C<http_request> returns a "cancellation guard" - you have to keep the |
95 | object at least alive until the callback get called. If the object gets |
90 | object at least alive until the callback get called. If the object gets |
96 | destroyed before the callback is called, the request will be cancelled. |
91 | destroyed before the callback is called, the request will be cancelled. |
97 | |
92 | |
98 | The callback will be called with the response body data as first argument |
93 | The callback will be called with the response body data as first argument |
99 | (or C<undef> if an error occured), and a hash-ref with response headers as |
94 | (or C<undef> if an error occured), and a hash-ref with response headers |
100 | second argument. |
95 | (and trailers) as second argument. |
101 | |
96 | |
102 | All the headers in that hash are lowercased. In addition to the response |
97 | All the headers in that hash are lowercased. In addition to the response |
103 | headers, the "pseudo-headers" (uppercase to avoid clashing with possible |
98 | headers, the "pseudo-headers" (uppercase to avoid clashing with possible |
104 | response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the |
99 | response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the |
105 | three parts of the HTTP Status-Line of the same name. If an error occurs |
100 | three parts of the HTTP Status-Line of the same name. If an error occurs |
… | |
… | |
122 | |
117 | |
123 | If the server sends a header multiple times, then their contents will be |
118 | If the server sends a header multiple times, then their contents will be |
124 | joined together with a comma (C<,>), as per the HTTP spec. |
119 | joined together with a comma (C<,>), as per the HTTP spec. |
125 | |
120 | |
126 | If an internal error occurs, such as not being able to resolve a hostname, |
121 | If an internal error occurs, such as not being able to resolve a hostname, |
127 | then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x> |
122 | then C<$data> will be C<undef>, C<< $headers->{Status} >> will be |
128 | (usually C<599>) and the C<Reason> pseudo-header will contain an error |
123 | C<590>-C<599> and the C<Reason> pseudo-header will contain an error |
129 | message. |
124 | message. Currently the following status codes are used: |
|
|
125 | |
|
|
126 | =over 4 |
|
|
127 | |
|
|
128 | =item 595 - errors during connection etsbalishment, proxy handshake. |
|
|
129 | |
|
|
130 | =item 596 - errors during TLS negotiation, request sending and header processing. |
|
|
131 | |
|
|
132 | =item 597 - errors during body receiving or processing. |
|
|
133 | |
|
|
134 | =item 598 - user aborted request via C<on_header> or C<on_body>. |
|
|
135 | |
|
|
136 | =item 599 - other, usually nonretryable, errors (garbled URL etc.). |
|
|
137 | |
|
|
138 | =back |
130 | |
139 | |
131 | A typical callback might look like this: |
140 | A typical callback might look like this: |
132 | |
141 | |
133 | sub { |
142 | sub { |
134 | my ($body, $hdr) = @_; |
143 | my ($body, $hdr) = @_; |
… | |
… | |
150 | Whether to recurse requests or not, e.g. on redirects, authentication |
159 | Whether to recurse requests or not, e.g. on redirects, authentication |
151 | retries and so on, and how often to do so. |
160 | retries and so on, and how often to do so. |
152 | |
161 | |
153 | =item headers => hashref |
162 | =item headers => hashref |
154 | |
163 | |
155 | The request headers to use. Currently, C<http_request> may provide its |
164 | The request headers to use. Currently, C<http_request> may provide its own |
156 | own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers |
165 | C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and |
157 | and will provide defaults for C<User-Agent:> and C<Referer:> (this can be |
166 | will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:> |
158 | suppressed by using C<undef> for these headers in which case they won't be |
167 | (this can be suppressed by using C<undef> for these headers in which case |
159 | sent at all). |
168 | they won't be sent at all). |
|
|
169 | |
|
|
170 | You really should provide your own C<User-Agent:> header value that is |
|
|
171 | appropriate for your program - I wouldn't be surprised if the default |
|
|
172 | AnyEvent string gets blocked by webservers sooner or later. |
160 | |
173 | |
161 | =item timeout => $seconds |
174 | =item timeout => $seconds |
162 | |
175 | |
163 | The time-out to use for various stages - each connect attempt will reset |
176 | The time-out to use for various stages - each connect attempt will reset |
164 | the timeout, as will read or write activity, i.e. this is not an overall |
177 | the timeout, as will read or write activity, i.e. this is not an overall |
… | |
… | |
169 | =item proxy => [$host, $port[, $scheme]] or undef |
182 | =item proxy => [$host, $port[, $scheme]] or undef |
170 | |
183 | |
171 | Use the given http proxy for all requests. If not specified, then the |
184 | Use the given http proxy for all requests. If not specified, then the |
172 | default proxy (as specified by C<$ENV{http_proxy}>) is used. |
185 | default proxy (as specified by C<$ENV{http_proxy}>) is used. |
173 | |
186 | |
174 | C<$scheme> must be either missing, C<http> for HTTP or C<https> for |
187 | C<$scheme> must be either missing or must be C<http> for HTTP. |
175 | HTTPS. |
|
|
176 | |
188 | |
177 | =item body => $string |
189 | =item body => $string |
178 | |
190 | |
179 | The request body, usually empty. Will be-sent as-is (future versions of |
191 | The request body, usually empty. Will be sent as-is (future versions of |
180 | this module might offer more options). |
192 | this module might offer more options). |
181 | |
193 | |
182 | =item cookie_jar => $hash_ref |
194 | =item cookie_jar => $hash_ref |
183 | |
195 | |
184 | Passing this parameter enables (simplified) cookie-processing, loosely |
196 | Passing this parameter enables (simplified) cookie-processing, loosely |
185 | based on the original netscape specification. |
197 | based on the original netscape specification. |
186 | |
198 | |
187 | The C<$hash_ref> must be an (initially empty) hash reference which will |
199 | The C<$hash_ref> must be an (initially empty) hash reference which |
188 | get updated automatically. It is possible to save the cookie_jar to |
200 | will get updated automatically. It is possible to save the cookie jar |
189 | persistent storage with something like JSON or Storable, but this is not |
201 | to persistent storage with something like JSON or Storable - see the |
190 | recommended, as expiry times are currently being ignored. |
202 | C<AnyEvent::HTTP::cookie_jar_expire> function if you wish to remove |
|
|
203 | expired or session-only cookies, and also for documentation on the format |
|
|
204 | of the cookie jar. |
191 | |
205 | |
192 | Note that this cookie implementation is not of very high quality, nor |
206 | Note that this cookie implementation is not meant to be complete. If |
193 | meant to be complete. If you want complete cookie management you have to |
207 | you want complete cookie management you have to do that on your |
194 | do that on your own. C<cookie_jar> is meant as a quick fix to get some |
208 | own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites |
195 | cookie-using sites working. Cookies are a privacy disaster, do not use |
209 | working. Cookies are a privacy disaster, do not use them unless required |
196 | them unless required to. |
210 | to. |
|
|
211 | |
|
|
212 | When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:> |
|
|
213 | headers will be set and handled by this module, otherwise they will be |
|
|
214 | left untouched. |
197 | |
215 | |
198 | =item tls_ctx => $scheme | $tls_ctx |
216 | =item tls_ctx => $scheme | $tls_ctx |
199 | |
217 | |
200 | Specifies the AnyEvent::TLS context to be used for https connections. This |
218 | Specifies the AnyEvent::TLS context to be used for https connections. This |
201 | parameter follows the same rules as the C<tls_ctx> parameter to |
219 | parameter follows the same rules as the C<tls_ctx> parameter to |
… | |
… | |
205 | verification) TLS context. |
223 | verification) TLS context. |
206 | |
224 | |
207 | The default for this option is C<low>, which could be interpreted as "give |
225 | The default for this option is C<low>, which could be interpreted as "give |
208 | me the page, no matter what". |
226 | me the page, no matter what". |
209 | |
227 | |
|
|
228 | See also the C<sessionid> parameter. |
|
|
229 | |
|
|
230 | =item session => $string |
|
|
231 | |
|
|
232 | The module might reuse connections to the same host internally. Sometimes |
|
|
233 | (e.g. when using TLS), you do not want to reuse connections from other |
|
|
234 | sessions. This can be achieved by setting this parameter to some unique |
|
|
235 | ID (such as the address of an object storing your state data, or the TLS |
|
|
236 | context) - only connections using the same unique ID will be reused. |
|
|
237 | |
210 | =item on_prepare => $callback->($fh) |
238 | =item on_prepare => $callback->($fh) |
211 | |
239 | |
212 | In rare cases you need to "tune" the socket before it is used to |
240 | In rare cases you need to "tune" the socket before it is used to |
213 | connect (for exmaple, to bind it on a given IP address). This parameter |
241 | connect (for exmaple, to bind it on a given IP address). This parameter |
214 | overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> |
242 | overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> |
… | |
… | |
240 | |
268 | |
241 | This callback is useful, among other things, to quickly reject unwanted |
269 | This callback is useful, among other things, to quickly reject unwanted |
242 | content, which, if it is supposed to be rare, can be faster than first |
270 | content, which, if it is supposed to be rare, can be faster than first |
243 | doing a C<HEAD> request. |
271 | doing a C<HEAD> request. |
244 | |
272 | |
|
|
273 | The downside is that cancelling the request makes it impossible to re-use |
|
|
274 | the connection. Also, the C<on_header> callback will not receive any |
|
|
275 | trailer (headers sent after the response body). |
|
|
276 | |
245 | Example: cancel the request unless the content-type is "text/html". |
277 | Example: cancel the request unless the content-type is "text/html". |
246 | |
278 | |
247 | on_header => sub { |
279 | on_header => sub { |
248 | $_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/ |
280 | $_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/ |
249 | }, |
281 | }, |
… | |
… | |
255 | string instead of the body data. |
287 | string instead of the body data. |
256 | |
288 | |
257 | It has to return either true (in which case AnyEvent::HTTP will continue), |
289 | It has to return either true (in which case AnyEvent::HTTP will continue), |
258 | or false, in which case AnyEvent::HTTP will cancel the download (and call |
290 | or false, in which case AnyEvent::HTTP will cancel the download (and call |
259 | the completion callback with an error code of C<598>). |
291 | the completion callback with an error code of C<598>). |
|
|
292 | |
|
|
293 | The downside to cancelling the request is that it makes it impossible to |
|
|
294 | re-use the connection. |
260 | |
295 | |
261 | This callback is useful when the data is too large to be held in memory |
296 | This callback is useful when the data is too large to be held in memory |
262 | (so the callback writes it to a file) or when only some information should |
297 | (so the callback writes it to a file) or when only some information should |
263 | be extracted, or when the body should be processed incrementally. |
298 | be extracted, or when the body should be processed incrementally. |
264 | |
299 | |
… | |
… | |
276 | called. Instead of the C<$body> argument containing the body data, the |
311 | called. Instead of the C<$body> argument containing the body data, the |
277 | callback will receive the L<AnyEvent::Handle> object associated with the |
312 | callback will receive the L<AnyEvent::Handle> object associated with the |
278 | connection. In error cases, C<undef> will be passed. When there is no body |
313 | connection. In error cases, C<undef> will be passed. When there is no body |
279 | (e.g. status C<304>), the empty string will be passed. |
314 | (e.g. status C<304>), the empty string will be passed. |
280 | |
315 | |
281 | The handle object might or might not be in TLS mode, might be connected to |
316 | The handle object might or might not be in TLS mode, might be connected |
282 | a proxy, be a persistent connection etc., and configured in unspecified |
317 | to a proxy, be a persistent connection, use chunked transfer encoding |
283 | ways. The user is responsible for this handle (it will not be used by this |
318 | etc., and configured in unspecified ways. The user is responsible for this |
284 | module anymore). |
319 | handle (it will not be used by this module anymore). |
285 | |
320 | |
286 | This is useful with some push-type services, where, after the initial |
321 | This is useful with some push-type services, where, after the initial |
287 | headers, an interactive protocol is used (typical example would be the |
322 | headers, an interactive protocol is used (typical example would be the |
288 | push-style twitter API which starts a JSON/XML stream). |
323 | push-style twitter API which starts a JSON/XML stream). |
289 | |
324 | |
290 | If you think you need this, first have a look at C<on_body>, to see if |
325 | If you think you need this, first have a look at C<on_body>, to see if |
291 | that doesn't solve your problem in a better way. |
326 | that doesn't solve your problem in a better way. |
292 | |
327 | |
|
|
328 | =item persistent => $boolean |
|
|
329 | |
|
|
330 | Try to create/reuse a persistent connection. When this flag is set |
|
|
331 | (default: true for idempotent requests, false for all others), then |
|
|
332 | C<http_request> tries to re-use an existing (previously-created) |
|
|
333 | persistent connection to the host and, failing that, tries to create a new |
|
|
334 | one. |
|
|
335 | |
|
|
336 | Requests failing in certain ways will be automatically retried once, which |
|
|
337 | is dangerous for non-idempotent requests, which is why it defaults to off |
|
|
338 | for them. The reason for this is because the bozos who designed HTTP/1.1 |
|
|
339 | made it impossible to distinguish between a fatal error and a normal |
|
|
340 | connection timeout, so you never know whether there was a problem with |
|
|
341 | your request or not. |
|
|
342 | |
|
|
343 | When reusing an existent connection, many parameters (such as TLS context) |
|
|
344 | will be ignored. See the C<session> parameter for a workaround. |
|
|
345 | |
|
|
346 | =item keepalive => $boolean |
|
|
347 | |
|
|
348 | Only used when C<persistent> is also true. This parameter decides whether |
|
|
349 | C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection |
|
|
350 | (as opposed to only a HTTP/1.1 persistent connection). |
|
|
351 | |
|
|
352 | The default is true, except when using a proxy, in which case it defaults |
|
|
353 | to false, as HTTP/1.0 proxies cannot support this in a meaningful way. |
|
|
354 | |
|
|
355 | =item handle_params => { key => value ... } |
|
|
356 | |
|
|
357 | The key-value pairs in this hash will be passed to any L<AnyEvent::Handle> |
|
|
358 | constructor that is called - not all requests will create a handle, and |
|
|
359 | sometimes more than one is created, so this parameter is only good for |
|
|
360 | setting hints. |
|
|
361 | |
|
|
362 | Example: set the maximum read size to 4096, to potentially conserve memory |
|
|
363 | at the cost of speed. |
|
|
364 | |
|
|
365 | handle_params => { |
|
|
366 | max_read_size => 4096, |
|
|
367 | }, |
|
|
368 | |
293 | =back |
369 | =back |
294 | |
370 | |
295 | Example: make a simple HTTP GET request for http://www.nethype.de/ |
371 | Example: do a simple HTTP GET request for http://www.nethype.de/ and print |
|
|
372 | the response body. |
296 | |
373 | |
297 | http_request GET => "http://www.nethype.de/", sub { |
374 | http_request GET => "http://www.nethype.de/", sub { |
298 | my ($body, $hdr) = @_; |
375 | my ($body, $hdr) = @_; |
299 | print "$body\n"; |
376 | print "$body\n"; |
300 | }; |
377 | }; |
301 | |
378 | |
302 | Example: make a HTTP HEAD request on https://www.google.com/, use a |
379 | Example: do a HTTP HEAD request on https://www.google.com/, use a |
303 | timeout of 30 seconds. |
380 | timeout of 30 seconds. |
304 | |
381 | |
305 | http_request |
382 | http_request |
306 | GET => "https://www.google.com", |
383 | GET => "https://www.google.com", |
|
|
384 | headers => { "user-agent" => "MySearchClient 1.0" }, |
307 | timeout => 30, |
385 | timeout => 30, |
308 | sub { |
386 | sub { |
309 | my ($body, $hdr) = @_; |
387 | my ($body, $hdr) = @_; |
310 | use Data::Dumper; |
388 | use Data::Dumper; |
311 | print Dumper $hdr; |
389 | print Dumper $hdr; |
312 | } |
390 | } |
313 | ; |
391 | ; |
314 | |
392 | |
315 | Example: make another simple HTTP GET request, but immediately try to |
393 | Example: do another simple HTTP GET request, but immediately try to |
316 | cancel it. |
394 | cancel it. |
317 | |
395 | |
318 | my $request = http_request GET => "http://www.nethype.de/", sub { |
396 | my $request = http_request GET => "http://www.nethype.de/", sub { |
319 | my ($body, $hdr) = @_; |
397 | my ($body, $hdr) = @_; |
320 | print "$body\n"; |
398 | print "$body\n"; |
321 | }; |
399 | }; |
322 | |
400 | |
323 | undef $request; |
401 | undef $request; |
324 | |
402 | |
325 | =cut |
403 | =cut |
|
|
404 | |
|
|
405 | ############################################################################# |
|
|
406 | # wait queue/slots |
326 | |
407 | |
327 | sub _slot_schedule; |
408 | sub _slot_schedule; |
328 | sub _slot_schedule($) { |
409 | sub _slot_schedule($) { |
329 | my $host = shift; |
410 | my $host = shift; |
330 | |
411 | |
… | |
… | |
352 | push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
433 | push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
353 | |
434 | |
354 | _slot_schedule $_[0]; |
435 | _slot_schedule $_[0]; |
355 | } |
436 | } |
356 | |
437 | |
|
|
438 | ############################################################################# |
|
|
439 | # cookie handling |
|
|
440 | |
|
|
441 | # expire cookies |
|
|
442 | sub cookie_jar_expire($;$) { |
|
|
443 | my ($jar, $session_end) = @_; |
|
|
444 | |
|
|
445 | %$jar = () if $jar->{version} != 1; |
|
|
446 | |
|
|
447 | my $anow = AE::now; |
|
|
448 | |
|
|
449 | while (my ($chost, $paths) = each %$jar) { |
|
|
450 | next unless ref $paths; |
|
|
451 | |
|
|
452 | while (my ($cpath, $cookies) = each %$paths) { |
|
|
453 | while (my ($cookie, $kv) = each %$cookies) { |
|
|
454 | if (exists $kv->{_expires}) { |
|
|
455 | delete $cookies->{$cookie} |
|
|
456 | if $anow > $kv->{_expires}; |
|
|
457 | } elsif ($session_end) { |
|
|
458 | delete $cookies->{$cookie}; |
|
|
459 | } |
|
|
460 | } |
|
|
461 | |
|
|
462 | delete $paths->{$cpath} |
|
|
463 | unless %$cookies; |
|
|
464 | } |
|
|
465 | |
|
|
466 | delete $jar->{$chost} |
|
|
467 | unless %$paths; |
|
|
468 | } |
|
|
469 | } |
|
|
470 | |
|
|
471 | # extract cookies from jar |
|
|
472 | sub cookie_jar_extract($$$$) { |
|
|
473 | my ($jar, $scheme, $host, $path) = @_; |
|
|
474 | |
|
|
475 | %$jar = () if $jar->{version} != 1; |
|
|
476 | |
|
|
477 | my @cookies; |
|
|
478 | |
|
|
479 | while (my ($chost, $paths) = each %$jar) { |
|
|
480 | next unless ref $paths; |
|
|
481 | |
|
|
482 | if ($chost =~ /^\./) { |
|
|
483 | next unless $chost eq substr $host, -length $chost; |
|
|
484 | } elsif ($chost =~ /\./) { |
|
|
485 | next unless $chost eq $host; |
|
|
486 | } else { |
|
|
487 | next; |
|
|
488 | } |
|
|
489 | |
|
|
490 | while (my ($cpath, $cookies) = each %$paths) { |
|
|
491 | next unless $cpath eq substr $path, 0, length $cpath; |
|
|
492 | |
|
|
493 | while (my ($cookie, $kv) = each %$cookies) { |
|
|
494 | next if $scheme ne "https" && exists $kv->{secure}; |
|
|
495 | |
|
|
496 | if (exists $kv->{_expires} and AE::now > $kv->{_expires}) { |
|
|
497 | delete $cookies->{$cookie}; |
|
|
498 | next; |
|
|
499 | } |
|
|
500 | |
|
|
501 | my $value = $kv->{value}; |
|
|
502 | |
|
|
503 | if ($value =~ /[=;,[:space:]]/) { |
|
|
504 | $value =~ s/([\\"])/\\$1/g; |
|
|
505 | $value = "\"$value\""; |
|
|
506 | } |
|
|
507 | |
|
|
508 | push @cookies, "$cookie=$value"; |
|
|
509 | } |
|
|
510 | } |
|
|
511 | } |
|
|
512 | |
|
|
513 | \@cookies |
|
|
514 | } |
|
|
515 | |
|
|
516 | # parse set_cookie header into jar |
|
|
517 | sub cookie_jar_set_cookie($$$$) { |
|
|
518 | my ($jar, $set_cookie, $host, $date) = @_; |
|
|
519 | |
|
|
520 | my $anow = int AE::now; |
|
|
521 | my $snow; # server-now |
|
|
522 | |
|
|
523 | for ($set_cookie) { |
|
|
524 | # parse NAME=VALUE |
|
|
525 | my @kv; |
|
|
526 | |
|
|
527 | # expires is not http-compliant in the original cookie-spec, |
|
|
528 | # we support the official date format and some extensions |
|
|
529 | while ( |
|
|
530 | m{ |
|
|
531 | \G\s* |
|
|
532 | (?: |
|
|
533 | expires \s*=\s* ([A-Z][a-z][a-z]+,\ [^,;]+) |
|
|
534 | | ([^=;,[:space:]]+) (?: \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) ) )? |
|
|
535 | ) |
|
|
536 | }gcxsi |
|
|
537 | ) { |
|
|
538 | my $name = $2; |
|
|
539 | my $value = $4; |
|
|
540 | |
|
|
541 | if (defined $1) { |
|
|
542 | # expires |
|
|
543 | $name = "expires"; |
|
|
544 | $value = $1; |
|
|
545 | } elsif (defined $3) { |
|
|
546 | # quoted |
|
|
547 | $value = $3; |
|
|
548 | $value =~ s/\\(.)/$1/gs; |
|
|
549 | } |
|
|
550 | |
|
|
551 | push @kv, @kv ? lc $name : $name, $value; |
|
|
552 | |
|
|
553 | last unless /\G\s*;/gc; |
|
|
554 | } |
|
|
555 | |
|
|
556 | last unless @kv; |
|
|
557 | |
|
|
558 | my $name = shift @kv; |
|
|
559 | my %kv = (value => shift @kv, @kv); |
|
|
560 | |
|
|
561 | if (exists $kv{"max-age"}) { |
|
|
562 | $kv{_expires} = $anow + delete $kv{"max-age"}; |
|
|
563 | } elsif (exists $kv{expires}) { |
|
|
564 | $snow ||= parse_date ($date) || $anow; |
|
|
565 | $kv{_expires} = $anow + (parse_date (delete $kv{expires}) - $snow); |
|
|
566 | } else { |
|
|
567 | delete $kv{_expires}; |
|
|
568 | } |
|
|
569 | |
|
|
570 | my $cdom; |
|
|
571 | my $cpath = (delete $kv{path}) || "/"; |
|
|
572 | |
|
|
573 | if (exists $kv{domain}) { |
|
|
574 | $cdom = delete $kv{domain}; |
|
|
575 | |
|
|
576 | $cdom =~ s/^\.?/./; # make sure it starts with a "." |
|
|
577 | |
|
|
578 | next if $cdom =~ /\.$/; |
|
|
579 | |
|
|
580 | # this is not rfc-like and not netscape-like. go figure. |
|
|
581 | my $ndots = $cdom =~ y/.//; |
|
|
582 | next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2); |
|
|
583 | } else { |
|
|
584 | $cdom = $host; |
|
|
585 | } |
|
|
586 | |
|
|
587 | # store it |
|
|
588 | $jar->{version} = 1; |
|
|
589 | $jar->{lc $cdom}{$cpath}{$name} = \%kv; |
|
|
590 | |
|
|
591 | redo if /\G\s*,/gc; |
|
|
592 | } |
|
|
593 | } |
|
|
594 | |
|
|
595 | ############################################################################# |
|
|
596 | # keepalive/persistent connection cache |
|
|
597 | |
|
|
598 | # fetch a connection from the keepalive cache |
|
|
599 | sub ka_fetch($) { |
|
|
600 | my $ka_key = shift; |
|
|
601 | |
|
|
602 | my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection |
|
|
603 | delete $KA_CACHE{$ka_key} |
|
|
604 | unless @{ $KA_CACHE{$ka_key} }; |
|
|
605 | |
|
|
606 | $hdl |
|
|
607 | } |
|
|
608 | |
|
|
609 | sub ka_store($$) { |
|
|
610 | my ($ka_key, $hdl) = @_; |
|
|
611 | |
|
|
612 | my $kaa = $KA_CACHE{$ka_key} ||= []; |
|
|
613 | |
|
|
614 | my $destroy = sub { |
|
|
615 | my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} }; |
|
|
616 | |
|
|
617 | $hdl->destroy; |
|
|
618 | |
|
|
619 | @ka |
|
|
620 | ? $KA_CACHE{$ka_key} = \@ka |
|
|
621 | : delete $KA_CACHE{$ka_key}; |
|
|
622 | }; |
|
|
623 | |
|
|
624 | # on error etc., destroy |
|
|
625 | $hdl->on_error ($destroy); |
|
|
626 | $hdl->on_eof ($destroy); |
|
|
627 | $hdl->on_read ($destroy); |
|
|
628 | $hdl->timeout ($PERSISTENT_TIMEOUT); |
|
|
629 | |
|
|
630 | push @$kaa, $hdl; |
|
|
631 | shift @$kaa while @$kaa > $MAX_PER_HOST; |
|
|
632 | } |
|
|
633 | |
|
|
634 | ############################################################################# |
|
|
635 | # utilities |
|
|
636 | |
357 | # continue to parse $_ for headers and place them into the arg |
637 | # continue to parse $_ for headers and place them into the arg |
358 | sub parse_hdr() { |
638 | sub _parse_hdr() { |
359 | my %hdr; |
639 | my %hdr; |
360 | |
640 | |
361 | # things seen, not parsed: |
641 | # things seen, not parsed: |
362 | # p3pP="NON CUR OTPi OUR NOR UNI" |
642 | # p3pP="NON CUR OTPi OUR NOR UNI" |
363 | |
643 | |
… | |
… | |
377 | for values %hdr; |
657 | for values %hdr; |
378 | |
658 | |
379 | \%hdr |
659 | \%hdr |
380 | } |
660 | } |
381 | |
661 | |
|
|
662 | ############################################################################# |
|
|
663 | # http_get |
|
|
664 | |
382 | our $qr_nlnl = qr{(?<![^\012])\015?\012}; |
665 | our $qr_nlnl = qr{(?<![^\012])\015?\012}; |
383 | |
666 | |
384 | our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; |
667 | our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; |
385 | our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; |
668 | our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; |
|
|
669 | |
|
|
670 | # maybe it should just become a normal object :/ |
|
|
671 | |
|
|
672 | sub _destroy_state(\%) { |
|
|
673 | my ($state) = @_; |
|
|
674 | |
|
|
675 | $state->{handle}->destroy if $state->{handle}; |
|
|
676 | %$state = (); |
|
|
677 | } |
|
|
678 | |
|
|
679 | sub _error(\%$$) { |
|
|
680 | my ($state, $cb, $hdr) = @_; |
|
|
681 | |
|
|
682 | &_destroy_state ($state); |
|
|
683 | |
|
|
684 | $cb->(undef, $hdr); |
|
|
685 | () |
|
|
686 | } |
386 | |
687 | |
387 | sub http_request($$@) { |
688 | sub http_request($$@) { |
388 | my $cb = pop; |
689 | my $cb = pop; |
389 | my ($method, $url, %arg) = @_; |
690 | my ($method, $url, %arg) = @_; |
390 | |
691 | |
… | |
… | |
411 | if $recurse < 0; |
712 | if $recurse < 0; |
412 | |
713 | |
413 | my $proxy = $arg{proxy} || $PROXY; |
714 | my $proxy = $arg{proxy} || $PROXY; |
414 | my $timeout = $arg{timeout} || $TIMEOUT; |
715 | my $timeout = $arg{timeout} || $TIMEOUT; |
415 | |
716 | |
416 | my ($uscheme, $uauthority, $upath, $query, $fragment) = |
717 | my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment |
417 | $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|; |
718 | $url =~ m|^([^:]+):(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?$|; |
418 | |
719 | |
419 | $uscheme = lc $uscheme; |
720 | $uscheme = lc $uscheme; |
420 | |
721 | |
421 | my $uport = $uscheme eq "http" ? 80 |
722 | my $uport = $uscheme eq "http" ? 80 |
422 | : $uscheme eq "https" ? 443 |
723 | : $uscheme eq "https" ? 443 |
423 | : return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" }); |
724 | : return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" }); |
424 | |
725 | |
425 | $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x |
726 | $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x |
426 | or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" }); |
727 | or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" }); |
427 | |
728 | |
428 | my $uhost = $1; |
729 | my $uhost = lc $1; |
429 | $uport = $2 if defined $2; |
730 | $uport = $2 if defined $2; |
430 | |
731 | |
431 | $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" |
732 | $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" |
432 | unless exists $hdr{host}; |
733 | unless exists $hdr{host}; |
433 | |
734 | |
… | |
… | |
436 | |
737 | |
437 | $upath =~ s%^/?%/%; |
738 | $upath =~ s%^/?%/%; |
438 | |
739 | |
439 | # cookie processing |
740 | # cookie processing |
440 | if (my $jar = $arg{cookie_jar}) { |
741 | if (my $jar = $arg{cookie_jar}) { |
441 | %$jar = () if $jar->{version} != 1; |
742 | my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath; |
442 | |
743 | |
443 | my @cookie; |
|
|
444 | |
|
|
445 | while (my ($chost, $v) = each %$jar) { |
|
|
446 | if ($chost =~ /^\./) { |
|
|
447 | next unless $chost eq substr $uhost, -length $chost; |
|
|
448 | } elsif ($chost =~ /\./) { |
|
|
449 | next unless $chost eq $uhost; |
|
|
450 | } else { |
|
|
451 | next; |
|
|
452 | } |
|
|
453 | |
|
|
454 | while (my ($cpath, $v) = each %$v) { |
|
|
455 | next unless $cpath eq substr $upath, 0, length $cpath; |
|
|
456 | |
|
|
457 | while (my ($k, $v) = each %$v) { |
|
|
458 | next if $uscheme ne "https" && exists $v->{secure}; |
|
|
459 | my $value = $v->{value}; |
|
|
460 | $value =~ s/([\\"])/\\$1/g; |
|
|
461 | push @cookie, "$k=\"$value\""; |
|
|
462 | } |
|
|
463 | } |
|
|
464 | } |
|
|
465 | |
|
|
466 | $hdr{cookie} = join "; ", @cookie |
744 | $hdr{cookie} = join "; ", @$cookies |
467 | if @cookie; |
745 | if @$cookies; |
468 | } |
746 | } |
469 | |
747 | |
470 | my ($rhost, $rport, $rscheme, $rpath); # request host, port, path |
748 | my ($rhost, $rport, $rscheme, $rpath); # request host, port, path |
471 | |
749 | |
472 | if ($proxy) { |
750 | if ($proxy) { |
… | |
… | |
475 | $rscheme = "http" unless defined $rscheme; |
753 | $rscheme = "http" unless defined $rscheme; |
476 | |
754 | |
477 | # don't support https requests over https-proxy transport, |
755 | # don't support https requests over https-proxy transport, |
478 | # can't be done with tls as spec'ed, unless you double-encrypt. |
756 | # can't be done with tls as spec'ed, unless you double-encrypt. |
479 | $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; |
757 | $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; |
|
|
758 | |
|
|
759 | $rhost = lc $rhost; |
|
|
760 | $rscheme = lc $rscheme; |
480 | } else { |
761 | } else { |
481 | ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); |
762 | ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); |
482 | } |
763 | } |
483 | |
764 | |
484 | # leave out fragment and query string, just a heuristic |
765 | # leave out fragment and query string, just a heuristic |
… | |
… | |
486 | $hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"}; |
767 | $hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"}; |
487 | |
768 | |
488 | $hdr{"content-length"} = length $arg{body} |
769 | $hdr{"content-length"} = length $arg{body} |
489 | if length $arg{body} || $method ne "GET"; |
770 | if length $arg{body} || $method ne "GET"; |
490 | |
771 | |
491 | $hdr{connection} = "close TE"; |
772 | my $idempotent = $method =~ /^(?:GET|HEAD|PUT|DELETE|OPTIONS|TRACE)$/; |
|
|
773 | |
|
|
774 | # default value for keepalive is true iff the request is for an idempotent method |
|
|
775 | my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : $idempotent; |
|
|
776 | my $keepalive10 = exists $arg{keepalive10} ? $arg{keepalive10} : !$proxy; |
|
|
777 | my $keptalive; # true if this is actually a recycled connection |
|
|
778 | |
|
|
779 | # the key to use in the keepalive cache |
|
|
780 | my $ka_key = "$uhost\x00$arg{sessionid}"; |
|
|
781 | |
|
|
782 | $hdr{connection} = ($keepalive ? $keepalive10 ? "keep-alive " : "" : "close ") . "Te"; #1.1 |
492 | $hdr{te} = "trailers" unless exists $hdr{te}; |
783 | $hdr{te} = "trailers" unless exists $hdr{te}; #1.1 |
493 | |
784 | |
494 | my %state = (connect_guard => 1); |
785 | my %state = (connect_guard => 1); |
|
|
786 | |
|
|
787 | my $ae_error = 595; # connecting |
|
|
788 | |
|
|
789 | # handle actual, non-tunneled, request |
|
|
790 | my $handle_actual_request = sub { |
|
|
791 | $ae_error = 596; # request phase |
|
|
792 | |
|
|
793 | my $hdl = $state{handle}; |
|
|
794 | |
|
|
795 | $hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls}; |
|
|
796 | |
|
|
797 | # send request |
|
|
798 | $hdl->push_write ( |
|
|
799 | "$method $rpath HTTP/1.1\015\012" |
|
|
800 | . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) |
|
|
801 | . "\015\012" |
|
|
802 | . (delete $arg{body}) |
|
|
803 | ); |
|
|
804 | |
|
|
805 | # return if error occured during push_write() |
|
|
806 | return unless %state; |
|
|
807 | |
|
|
808 | # reduce memory usage, save a kitten, also re-use it for the response headers. |
|
|
809 | %hdr = (); |
|
|
810 | |
|
|
811 | # status line and headers |
|
|
812 | $state{read_response} = sub { |
|
|
813 | return unless %state; |
|
|
814 | |
|
|
815 | for ("$_[1]") { |
|
|
816 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
|
|
817 | |
|
|
818 | /^HTTP\/0*([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/gxci |
|
|
819 | or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" }; |
|
|
820 | |
|
|
821 | # 100 Continue handling |
|
|
822 | # should not happen as we don't send expect: 100-continue, |
|
|
823 | # but we handle it just in case. |
|
|
824 | # since we send the request body regardless, if we get an error |
|
|
825 | # we are out of-sync, which we currently do NOT handle correctly. |
|
|
826 | return $state{handle}->push_read (line => $qr_nlnl, $state{read_response}) |
|
|
827 | if $2 eq 100; |
|
|
828 | |
|
|
829 | push @pseudo, |
|
|
830 | HTTPVersion => $1, |
|
|
831 | Status => $2, |
|
|
832 | Reason => $3, |
|
|
833 | ; |
|
|
834 | |
|
|
835 | my $hdr = _parse_hdr |
|
|
836 | or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" }; |
|
|
837 | |
|
|
838 | %hdr = (%$hdr, @pseudo); |
|
|
839 | } |
|
|
840 | |
|
|
841 | # redirect handling |
|
|
842 | # microsoft and other shitheads don't give a shit for following standards, |
|
|
843 | # try to support some common forms of broken Location headers. |
|
|
844 | if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { |
|
|
845 | $hdr{location} =~ s/^\.\/+//; |
|
|
846 | |
|
|
847 | my $url = "$rscheme://$uhost:$uport"; |
|
|
848 | |
|
|
849 | unless ($hdr{location} =~ s/^\///) { |
|
|
850 | $url .= $upath; |
|
|
851 | $url =~ s/\/[^\/]*$//; |
|
|
852 | } |
|
|
853 | |
|
|
854 | $hdr{location} = "$url/$hdr{location}"; |
|
|
855 | } |
|
|
856 | |
|
|
857 | my $redirect; |
|
|
858 | |
|
|
859 | if ($recurse) { |
|
|
860 | my $status = $hdr{Status}; |
|
|
861 | |
|
|
862 | # industry standard is to redirect POST as GET for |
|
|
863 | # 301, 302 and 303, in contrast to HTTP/1.0 and 1.1. |
|
|
864 | # also, the UA should ask the user for 301 and 307 and POST, |
|
|
865 | # industry standard seems to be to simply follow. |
|
|
866 | # we go with the industry standard. |
|
|
867 | if ($status == 301 or $status == 302 or $status == 303) { |
|
|
868 | # HTTP/1.1 is unclear on how to mutate the method |
|
|
869 | $method = "GET" unless $method eq "HEAD"; |
|
|
870 | $redirect = 1; |
|
|
871 | } elsif ($status == 307) { |
|
|
872 | $redirect = 1; |
|
|
873 | } |
|
|
874 | } |
|
|
875 | |
|
|
876 | my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive]) |
|
|
877 | if ($state{handle}) { |
|
|
878 | # handle keepalive |
|
|
879 | if ( |
|
|
880 | $keepalive |
|
|
881 | && $_[3] |
|
|
882 | && ($hdr{HTTPVersion} < 1.1 |
|
|
883 | ? $hdr{connection} =~ /\bkeep-?alive\b/i |
|
|
884 | : $hdr{connection} !~ /\bclose\b/i) |
|
|
885 | ) { |
|
|
886 | ka_store $ka_key, delete $state{handle}; |
|
|
887 | } else { |
|
|
888 | # no keepalive, destroy the handle |
|
|
889 | $state{handle}->destroy; |
|
|
890 | } |
|
|
891 | } |
|
|
892 | |
|
|
893 | %state = (); |
|
|
894 | |
|
|
895 | if (defined $_[1]) { |
|
|
896 | $hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1]; |
|
|
897 | $hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2]; |
|
|
898 | } |
|
|
899 | |
|
|
900 | # set-cookie processing |
|
|
901 | if ($arg{cookie_jar}) { |
|
|
902 | cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date}; |
|
|
903 | } |
|
|
904 | |
|
|
905 | if ($redirect && exists $hdr{location}) { |
|
|
906 | # we ignore any errors, as it is very common to receive |
|
|
907 | # Content-Length != 0 but no actual body |
|
|
908 | # we also access %hdr, as $_[1] might be an erro |
|
|
909 | http_request ( |
|
|
910 | $method => $hdr{location}, |
|
|
911 | %arg, |
|
|
912 | recurse => $recurse - 1, |
|
|
913 | Redirect => [$_[0], \%hdr], |
|
|
914 | $cb |
|
|
915 | ); |
|
|
916 | } else { |
|
|
917 | $cb->($_[0], \%hdr); |
|
|
918 | } |
|
|
919 | }; |
|
|
920 | |
|
|
921 | $ae_error = 597; # body phase |
|
|
922 | |
|
|
923 | my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct... |
|
|
924 | |
|
|
925 | my $len = $chunked ? undef : $hdr{"content-length"}; |
|
|
926 | |
|
|
927 | # body handling, many different code paths |
|
|
928 | # - no body expected |
|
|
929 | # - want_body_handle |
|
|
930 | # - te chunked |
|
|
931 | # - 2x length known (with or without on_body) |
|
|
932 | # - 2x length not known (with or without on_body) |
|
|
933 | if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { |
|
|
934 | $finish->(undef, 598 => "Request cancelled by on_header"); |
|
|
935 | } elsif ( |
|
|
936 | $hdr{Status} =~ /^(?:1..|204|205|304)$/ |
|
|
937 | or $method eq "HEAD" |
|
|
938 | or (defined $len && $len == 0) # == 0, not !, because "0 " is true |
|
|
939 | ) { |
|
|
940 | # no body |
|
|
941 | $finish->("", undef, undef, 1); |
|
|
942 | |
|
|
943 | } elsif (!$redirect && $arg{want_body_handle}) { |
|
|
944 | $_[0]->on_eof (undef); |
|
|
945 | $_[0]->on_error (undef); |
|
|
946 | $_[0]->on_read (undef); |
|
|
947 | |
|
|
948 | $finish->(delete $state{handle}); |
|
|
949 | |
|
|
950 | } elsif ($chunked) { |
|
|
951 | my $cl = 0; |
|
|
952 | my $body = ""; |
|
|
953 | my $on_body = $arg{on_body} || sub { $body .= shift; 1 }; |
|
|
954 | |
|
|
955 | $state{read_chunk} = sub { |
|
|
956 | $_[1] =~ /^([0-9a-fA-F]+)/ |
|
|
957 | or $finish->(undef, $ae_error => "Garbled chunked transfer encoding"); |
|
|
958 | |
|
|
959 | my $len = hex $1; |
|
|
960 | |
|
|
961 | if ($len) { |
|
|
962 | $cl += $len; |
|
|
963 | |
|
|
964 | $_[0]->push_read (chunk => $len, sub { |
|
|
965 | $on_body->($_[1], \%hdr) |
|
|
966 | or return $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
967 | |
|
|
968 | $_[0]->push_read (line => sub { |
|
|
969 | length $_[1] |
|
|
970 | and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding"); |
|
|
971 | $_[0]->push_read (line => $state{read_chunk}); |
|
|
972 | }); |
|
|
973 | }); |
|
|
974 | } else { |
|
|
975 | $hdr{"content-length"} ||= $cl; |
|
|
976 | |
|
|
977 | $_[0]->push_read (line => $qr_nlnl, sub { |
|
|
978 | if (length $_[1]) { |
|
|
979 | for ("$_[1]") { |
|
|
980 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
|
|
981 | |
|
|
982 | my $hdr = _parse_hdr |
|
|
983 | or return $finish->(undef, $ae_error => "Garbled response trailers"); |
|
|
984 | |
|
|
985 | %hdr = (%hdr, %$hdr); |
|
|
986 | } |
|
|
987 | } |
|
|
988 | |
|
|
989 | $finish->($body, undef, undef, 1); |
|
|
990 | }); |
|
|
991 | } |
|
|
992 | }; |
|
|
993 | |
|
|
994 | $_[0]->push_read (line => $state{read_chunk}); |
|
|
995 | |
|
|
996 | } elsif ($arg{on_body}) { |
|
|
997 | if (defined $len) { |
|
|
998 | $_[0]->on_read (sub { |
|
|
999 | $len -= length $_[0]{rbuf}; |
|
|
1000 | |
|
|
1001 | $arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
|
|
1002 | or return $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
1003 | |
|
|
1004 | $len > 0 |
|
|
1005 | or $finish->("", undef, undef, 1); |
|
|
1006 | }); |
|
|
1007 | } else { |
|
|
1008 | $_[0]->on_eof (sub { |
|
|
1009 | $finish->(""); |
|
|
1010 | }); |
|
|
1011 | $_[0]->on_read (sub { |
|
|
1012 | $arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
|
|
1013 | or $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
1014 | }); |
|
|
1015 | } |
|
|
1016 | } else { |
|
|
1017 | $_[0]->on_eof (undef); |
|
|
1018 | |
|
|
1019 | if (defined $len) { |
|
|
1020 | $_[0]->on_read (sub { |
|
|
1021 | $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1) |
|
|
1022 | if $len <= length $_[0]{rbuf}; |
|
|
1023 | }); |
|
|
1024 | } else { |
|
|
1025 | $_[0]->on_error (sub { |
|
|
1026 | ($! == Errno::EPIPE || !$!) |
|
|
1027 | ? $finish->(delete $_[0]{rbuf}) |
|
|
1028 | : $finish->(undef, $ae_error => $_[2]); |
|
|
1029 | }); |
|
|
1030 | $_[0]->on_read (sub { }); |
|
|
1031 | } |
|
|
1032 | } |
|
|
1033 | }; |
|
|
1034 | |
|
|
1035 | # if keepalive is enabled, then the server closing the connection |
|
|
1036 | # before a response can happen legally - we retry on idempotent methods. |
|
|
1037 | if ($keptalive && $idempotent) { |
|
|
1038 | my $old_eof = $hdl->{on_eof}; |
|
|
1039 | $hdl->{on_eof} = sub { |
|
|
1040 | _destroy_state %state; |
|
|
1041 | |
|
|
1042 | http_request ( |
|
|
1043 | $method => $url, |
|
|
1044 | %arg, |
|
|
1045 | keepalive => 0, |
|
|
1046 | $cb |
|
|
1047 | ); |
|
|
1048 | }; |
|
|
1049 | $hdl->on_read (sub { |
|
|
1050 | return unless %state; |
|
|
1051 | |
|
|
1052 | # as soon as we receive something, a connection close |
|
|
1053 | # once more becomes a hard error |
|
|
1054 | $hdl->{on_eof} = $old_eof; |
|
|
1055 | $hdl->push_read (line => $qr_nlnl, $state{read_response}); |
|
|
1056 | }); |
|
|
1057 | } else { |
|
|
1058 | $hdl->push_read (line => $qr_nlnl, $state{read_response}); |
|
|
1059 | } |
|
|
1060 | }; |
|
|
1061 | |
|
|
1062 | my $prepare_handle = sub { |
|
|
1063 | my ($hdl) = $state{handle}; |
|
|
1064 | |
|
|
1065 | $hdl->timeout ($timeout); |
|
|
1066 | $hdl->on_error (sub { |
|
|
1067 | _error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] }; |
|
|
1068 | }); |
|
|
1069 | $hdl->on_eof (sub { |
|
|
1070 | _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" }; |
|
|
1071 | }); |
|
|
1072 | }; |
|
|
1073 | |
|
|
1074 | # connected to proxy (or origin server) |
|
|
1075 | my $connect_cb = sub { |
|
|
1076 | my $fh = shift |
|
|
1077 | or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" }; |
|
|
1078 | |
|
|
1079 | return unless delete $state{connect_guard}; |
|
|
1080 | |
|
|
1081 | # get handle |
|
|
1082 | $state{handle} = new AnyEvent::Handle |
|
|
1083 | %{ $arg{handle_params} }, |
|
|
1084 | fh => $fh, |
|
|
1085 | peername => $uhost, |
|
|
1086 | tls_ctx => $arg{tls_ctx}, |
|
|
1087 | ; |
|
|
1088 | |
|
|
1089 | $prepare_handle->(); |
|
|
1090 | |
|
|
1091 | #$state{handle}->starttls ("connect") if $rscheme eq "https"; |
|
|
1092 | |
|
|
1093 | # now handle proxy-CONNECT method |
|
|
1094 | if ($proxy && $uscheme eq "https") { |
|
|
1095 | # oh dear, we have to wrap it into a connect request |
|
|
1096 | |
|
|
1097 | # maybe re-use $uauthority with patched port? |
|
|
1098 | $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012"); |
|
|
1099 | $state{handle}->push_read (line => $qr_nlnl, sub { |
|
|
1100 | $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix |
|
|
1101 | or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }; |
|
|
1102 | |
|
|
1103 | if ($2 == 200) { |
|
|
1104 | $rpath = $upath; |
|
|
1105 | $handle_actual_request->(); |
|
|
1106 | } else { |
|
|
1107 | _error %state, $cb, { @pseudo, Status => $2, Reason => $3 }; |
|
|
1108 | } |
|
|
1109 | }); |
|
|
1110 | } else { |
|
|
1111 | $handle_actual_request->(); |
|
|
1112 | } |
|
|
1113 | }; |
495 | |
1114 | |
496 | _get_slot $uhost, sub { |
1115 | _get_slot $uhost, sub { |
497 | $state{slot_guard} = shift; |
1116 | $state{slot_guard} = shift; |
498 | |
1117 | |
499 | return unless $state{connect_guard}; |
1118 | return unless $state{connect_guard}; |
500 | |
1119 | |
501 | my $connect_cb = sub { |
1120 | # try to use an existing keepalive connection, but only if we, ourselves, plan |
502 | $state{fh} = shift |
1121 | # on a keepalive request (in theory, this should be a separate config option). |
503 | or do { |
1122 | if ($keepalive && $KA_CACHE{$ka_key}) { |
504 | my $err = "$!"; |
1123 | $keptalive = 1; |
505 | %state = (); |
1124 | $state{handle} = ka_fetch $ka_key; |
506 | return $cb->(undef, { @pseudo, Status => 599, Reason => $err }); |
1125 | $prepare_handle->(); |
507 | }; |
|
|
508 | |
|
|
509 | pop; # free memory, save a tree |
|
|
510 | |
|
|
511 | return unless delete $state{connect_guard}; |
|
|
512 | |
|
|
513 | # get handle |
|
|
514 | $state{handle} = new AnyEvent::Handle |
|
|
515 | fh => $state{fh}, |
|
|
516 | peername => $rhost, |
|
|
517 | tls_ctx => $arg{tls_ctx}, |
|
|
518 | # these need to be reconfigured on keepalive handles |
|
|
519 | timeout => $timeout, |
|
|
520 | on_error => sub { |
|
|
521 | %state = (); |
|
|
522 | $cb->(undef, { @pseudo, Status => 599, Reason => $_[2] }); |
|
|
523 | }, |
|
|
524 | on_eof => sub { |
|
|
525 | %state = (); |
|
|
526 | $cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" }); |
|
|
527 | }, |
|
|
528 | ; |
|
|
529 | |
|
|
530 | # limit the number of persistent connections |
|
|
531 | # keepalive not yet supported |
|
|
532 | # if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { |
|
|
533 | # ++$KA_COUNT{$_[1]}; |
|
|
534 | # $state{handle}{ka_count_guard} = AnyEvent::Util::guard { |
|
|
535 | # --$KA_COUNT{$_[1]} |
|
|
536 | # }; |
|
|
537 | # $hdr{connection} = "keep-alive"; |
|
|
538 | # } else { |
|
|
539 | # delete $hdr{connection}; |
|
|
540 | # } |
|
|
541 | |
|
|
542 | $state{handle}->starttls ("connect") if $rscheme eq "https"; |
|
|
543 | |
|
|
544 | # handle actual, non-tunneled, request |
|
|
545 | my $handle_actual_request = sub { |
|
|
546 | $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; |
|
|
547 | |
|
|
548 | # send request |
|
|
549 | $state{handle}->push_write ( |
|
|
550 | "$method $rpath HTTP/1.1\015\012" |
|
|
551 | . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) |
|
|
552 | . "\015\012" |
|
|
553 | . (delete $arg{body}) |
|
|
554 | ); |
|
|
555 | |
|
|
556 | # return if error occured during push_write() |
|
|
557 | return unless %state; |
|
|
558 | |
|
|
559 | %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use |
|
|
560 | |
|
|
561 | # status line and headers |
|
|
562 | $state{handle}->push_read (line => $qr_nlnl, sub { |
|
|
563 | my $keepalive = pop; |
|
|
564 | |
|
|
565 | for ("$_[1]") { |
|
|
566 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
|
|
567 | |
|
|
568 | /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc |
|
|
569 | or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" })); |
|
|
570 | |
|
|
571 | push @pseudo, |
|
|
572 | HTTPVersion => $1, |
|
|
573 | Status => $2, |
|
|
574 | Reason => $3, |
|
|
575 | ; |
|
|
576 | |
|
|
577 | my $hdr = parse_hdr |
|
|
578 | or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" })); |
|
|
579 | |
|
|
580 | %hdr = (%$hdr, @pseudo); |
|
|
581 | } |
|
|
582 | |
|
|
583 | # redirect handling |
|
|
584 | # microsoft and other shitheads don't give a shit for following standards, |
|
|
585 | # try to support some common forms of broken Location headers. |
|
|
586 | if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { |
|
|
587 | $hdr{location} =~ s/^\.\/+//; |
|
|
588 | |
|
|
589 | my $url = "$rscheme://$uhost:$uport"; |
|
|
590 | |
|
|
591 | unless ($hdr{location} =~ s/^\///) { |
|
|
592 | $url .= $upath; |
|
|
593 | $url =~ s/\/[^\/]*$//; |
|
|
594 | } |
|
|
595 | |
|
|
596 | $hdr{location} = "$url/$hdr{location}"; |
|
|
597 | } |
|
|
598 | |
|
|
599 | my $redirect; |
|
|
600 | |
|
|
601 | if ($recurse) { |
|
|
602 | my $status = $hdr{Status}; |
|
|
603 | |
|
|
604 | # industry standard is to redirect POST as GET for |
|
|
605 | # 301, 302 and 303, in contrast to http/1.0 and 1.1. |
|
|
606 | # also, the UA should ask the user for 301 and 307 and POST, |
|
|
607 | # industry standard seems to be to simply follow. |
|
|
608 | # we go with the industry standard. |
|
|
609 | if ($status == 301 or $status == 302 or $status == 303) { |
|
|
610 | # HTTP/1.1 is unclear on how to mutate the method |
|
|
611 | $method = "GET" unless $method eq "HEAD"; |
|
|
612 | $redirect = 1; |
|
|
613 | } elsif ($status == 307) { |
|
|
614 | $redirect = 1; |
|
|
615 | } |
|
|
616 | } |
|
|
617 | |
|
|
618 | my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive]) |
|
|
619 | $state{handle}->destroy if $state{handle}; |
|
|
620 | %state = (); |
|
|
621 | |
|
|
622 | if (defined $_[1]) { |
|
|
623 | $hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1]; |
|
|
624 | $hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2]; |
|
|
625 | } |
|
|
626 | |
|
|
627 | # set-cookie processing |
|
|
628 | if ($arg{cookie_jar}) { |
|
|
629 | for ($hdr{"set-cookie"}) { |
|
|
630 | # parse NAME=VALUE |
|
|
631 | my @kv; |
|
|
632 | |
|
|
633 | while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { |
|
|
634 | my $name = $1; |
|
|
635 | my $value = $3; |
|
|
636 | |
|
|
637 | unless ($value) { |
|
|
638 | $value = $2; |
|
|
639 | $value =~ s/\\(.)/$1/gs; |
|
|
640 | } |
|
|
641 | |
|
|
642 | push @kv, $name => $value; |
|
|
643 | |
|
|
644 | last unless /\G\s*;/gc; |
|
|
645 | } |
|
|
646 | |
|
|
647 | last unless @kv; |
|
|
648 | |
|
|
649 | my $name = shift @kv; |
|
|
650 | my %kv = (value => shift @kv, @kv); |
|
|
651 | |
|
|
652 | my $cdom; |
|
|
653 | my $cpath = (delete $kv{path}) || "/"; |
|
|
654 | |
|
|
655 | if (exists $kv{domain}) { |
|
|
656 | $cdom = delete $kv{domain}; |
|
|
657 | |
|
|
658 | $cdom =~ s/^\.?/./; # make sure it starts with a "." |
|
|
659 | |
|
|
660 | next if $cdom =~ /\.$/; |
|
|
661 | |
|
|
662 | # this is not rfc-like and not netscape-like. go figure. |
|
|
663 | my $ndots = $cdom =~ y/.//; |
|
|
664 | next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2); |
|
|
665 | } else { |
|
|
666 | $cdom = $uhost; |
|
|
667 | } |
|
|
668 | |
|
|
669 | # store it |
|
|
670 | $arg{cookie_jar}{version} = 1; |
|
|
671 | $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv; |
|
|
672 | |
|
|
673 | redo if /\G\s*,/gc; |
|
|
674 | } |
|
|
675 | } |
|
|
676 | |
|
|
677 | if ($redirect && exists $hdr{location}) { |
|
|
678 | # we ignore any errors, as it is very common to receive |
|
|
679 | # Content-Length != 0 but no actual body |
|
|
680 | # we also access %hdr, as $_[1] might be an erro |
|
|
681 | http_request ( |
|
|
682 | $method => $hdr{location}, |
|
|
683 | %arg, |
|
|
684 | recurse => $recurse - 1, |
|
|
685 | Redirect => [$_[0], \%hdr], |
|
|
686 | $cb); |
|
|
687 | } else { |
|
|
688 | $cb->($_[0], \%hdr); |
|
|
689 | } |
|
|
690 | }; |
|
|
691 | |
|
|
692 | my $len = $hdr{"content-length"}; |
|
|
693 | |
|
|
694 | if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { |
|
|
695 | $finish->(undef, 598 => "Request cancelled by on_header"); |
|
|
696 | } elsif ( |
|
|
697 | $hdr{Status} =~ /^(?:1..|204|205|304)$/ |
|
|
698 | or $method eq "HEAD" |
|
|
699 | or (defined $len && !$len) |
|
|
700 | ) { |
|
|
701 | # no body |
|
|
702 | $finish->("", undef, undef, 1); |
|
|
703 | } else { |
|
|
704 | # body handling, many different code paths |
|
|
705 | # - no body expected |
|
|
706 | # - want_body_handle |
|
|
707 | # - te chunked |
|
|
708 | # - 2x length known (with or without on_body) |
|
|
709 | # - 2x length not known (with or without on_body) |
|
|
710 | if (!$redirect && $arg{want_body_handle}) { |
|
|
711 | $_[0]->on_eof (undef); |
|
|
712 | $_[0]->on_error (undef); |
|
|
713 | $_[0]->on_read (undef); |
|
|
714 | |
|
|
715 | $finish->(delete $state{handle}); |
|
|
716 | |
|
|
717 | } elsif ($hdr{"transfer-encoding"} =~ /chunked/) { |
|
|
718 | my $body = undef; |
|
|
719 | my $on_body = $arg{on_body} || sub { $body .= shift; 1 }; |
|
|
720 | |
|
|
721 | $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) }); |
|
|
722 | |
|
|
723 | my $read_chunk; $read_chunk = sub { |
|
|
724 | $_[1] =~ /^([0-9a-fA-F]+)/ |
|
|
725 | or $finish->(undef, 599 => "Garbled chunked transfer encoding"); |
|
|
726 | |
|
|
727 | my $len = hex $1; |
|
|
728 | |
|
|
729 | if ($len) { |
|
|
730 | $_[0]->push_read (chunk => hex $1, sub { |
|
|
731 | $on_body->($_[1], \%hdr) |
|
|
732 | or return $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
733 | |
|
|
734 | $_[0]->push_read (line => sub { |
|
|
735 | length $_[1] |
|
|
736 | and return $finish->(undef, 599 => "Garbled chunked transfer encoding"); |
|
|
737 | $_[0]->push_read (line => $read_chunk); |
|
|
738 | }); |
|
|
739 | }); |
|
|
740 | } else { |
|
|
741 | $_[0]->push_read (line => $qr_nlnl, sub { |
|
|
742 | if (length $_[1]) { |
|
|
743 | for ("$_[1]") { |
|
|
744 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
|
|
745 | |
|
|
746 | my $hdr = parse_hdr |
|
|
747 | or return $finish->(undef, 599 => "Garbled response trailers"); |
|
|
748 | |
|
|
749 | %hdr = (%hdr, %$hdr); |
|
|
750 | } |
|
|
751 | } |
|
|
752 | |
|
|
753 | $finish->($body, undef, undef, 1); |
|
|
754 | }); |
|
|
755 | } |
|
|
756 | }; |
|
|
757 | |
|
|
758 | $_[0]->push_read (line => $read_chunk); |
|
|
759 | |
|
|
760 | } elsif ($arg{on_body}) { |
|
|
761 | $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) }); |
|
|
762 | |
|
|
763 | if ($len) { |
|
|
764 | $_[0]->on_read (sub { |
|
|
765 | $len -= length $_[0]{rbuf}; |
|
|
766 | |
|
|
767 | $arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
|
|
768 | or return $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
769 | |
|
|
770 | $len > 0 |
|
|
771 | or $finish->("", undef, undef, 1); |
|
|
772 | }); |
|
|
773 | } else { |
|
|
774 | $_[0]->on_eof (sub { |
|
|
775 | $finish->(""); |
|
|
776 | }); |
|
|
777 | $_[0]->on_read (sub { |
|
|
778 | $arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
|
|
779 | or $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
780 | }); |
|
|
781 | } |
|
|
782 | } else { |
|
|
783 | $_[0]->on_eof (undef); |
|
|
784 | |
|
|
785 | if ($len) { |
|
|
786 | $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) }); |
|
|
787 | $_[0]->on_read (sub { |
|
|
788 | $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1) |
|
|
789 | if $len <= length $_[0]{rbuf}; |
|
|
790 | }); |
|
|
791 | } else { |
|
|
792 | $_[0]->on_error (sub { |
|
|
793 | ($! == Errno::EPIPE || !$!) |
|
|
794 | ? $finish->(delete $_[0]{rbuf}) |
|
|
795 | : $finish->(undef, 599 => $_[2]); |
|
|
796 | }); |
|
|
797 | $_[0]->on_read (sub { }); |
|
|
798 | } |
|
|
799 | } |
|
|
800 | } |
|
|
801 | }); |
|
|
802 | }; |
|
|
803 | |
|
|
804 | # now handle proxy-CONNECT method |
|
|
805 | if ($proxy && $uscheme eq "https") { |
|
|
806 | # oh dear, we have to wrap it into a connect request |
|
|
807 | |
|
|
808 | # maybe re-use $uauthority with patched port? |
|
|
809 | $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); |
|
|
810 | $state{handle}->push_read (line => $qr_nlnl, sub { |
|
|
811 | $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix |
|
|
812 | or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" })); |
|
|
813 | |
|
|
814 | if ($2 == 200) { |
|
|
815 | $rpath = $upath; |
|
|
816 | &$handle_actual_request; |
1126 | $handle_actual_request->(); |
817 | } else { |
1127 | |
818 | %state = (); |
|
|
819 | $cb->(undef, { @pseudo, Status => $2, Reason => $3 }); |
|
|
820 | } |
|
|
821 | }); |
|
|
822 | } else { |
1128 | } else { |
823 | &$handle_actual_request; |
|
|
824 | } |
|
|
825 | }; |
|
|
826 | |
|
|
827 | my $tcp_connect = $arg{tcp_connect} |
1129 | my $tcp_connect = $arg{tcp_connect} |
828 | || do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect }; |
1130 | || do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect }; |
829 | |
1131 | |
830 | $state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout }); |
1132 | $state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout }); |
831 | |
1133 | } |
832 | }; |
1134 | }; |
833 | |
1135 | |
834 | defined wantarray && AnyEvent::Util::guard { %state = () } |
1136 | defined wantarray && AnyEvent::Util::guard { _destroy_state %state } |
835 | } |
1137 | } |
836 | |
1138 | |
837 | sub http_get($@) { |
1139 | sub http_get($@) { |
838 | unshift @_, "GET"; |
1140 | unshift @_, "GET"; |
839 | &http_request |
1141 | &http_request |
… | |
… | |
857 | AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for |
1159 | AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for |
858 | the actual connection, which in turn uses AnyEvent::DNS to resolve |
1160 | the actual connection, which in turn uses AnyEvent::DNS to resolve |
859 | hostnames. The latter is a simple stub resolver and does no caching |
1161 | hostnames. The latter is a simple stub resolver and does no caching |
860 | on its own. If you want DNS caching, you currently have to provide |
1162 | on its own. If you want DNS caching, you currently have to provide |
861 | your own default resolver (by storing a suitable resolver object in |
1163 | your own default resolver (by storing a suitable resolver object in |
862 | C<$AnyEvent::DNS::RESOLVER>). |
1164 | C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback. |
863 | |
1165 | |
864 | =head2 GLOBAL FUNCTIONS AND VARIABLES |
1166 | =head2 GLOBAL FUNCTIONS AND VARIABLES |
865 | |
1167 | |
866 | =over 4 |
1168 | =over 4 |
867 | |
1169 | |
868 | =item AnyEvent::HTTP::set_proxy "proxy-url" |
1170 | =item AnyEvent::HTTP::set_proxy "proxy-url" |
869 | |
1171 | |
870 | Sets the default proxy server to use. The proxy-url must begin with a |
1172 | Sets the default proxy server to use. The proxy-url must begin with a |
871 | string of the form C<http://host:port> (optionally C<https:...>), croaks |
1173 | string of the form C<http://host:port>, croaks otherwise. |
872 | otherwise. |
|
|
873 | |
1174 | |
874 | To clear an already-set proxy, use C<undef>. |
1175 | To clear an already-set proxy, use C<undef>. |
|
|
1176 | |
|
|
1177 | =item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end] |
|
|
1178 | |
|
|
1179 | Remove all cookies from the cookie jar that have been expired. If |
|
|
1180 | C<$session_end> is given and true, then additionally remove all session |
|
|
1181 | cookies. |
|
|
1182 | |
|
|
1183 | You should call this function (with a true C<$session_end>) before you |
|
|
1184 | save cookies to disk, and you should call this function after loading them |
|
|
1185 | again. If you have a long-running program you can additonally call this |
|
|
1186 | function from time to time. |
|
|
1187 | |
|
|
1188 | A cookie jar is initially an empty hash-reference that is managed by this |
|
|
1189 | module. It's format is subject to change, but currently it is like this: |
|
|
1190 | |
|
|
1191 | The key C<version> has to contain C<1>, otherwise the hash gets |
|
|
1192 | emptied. All other keys are hostnames or IP addresses pointing to |
|
|
1193 | hash-references. The key for these inner hash references is the |
|
|
1194 | server path for which this cookie is meant, and the values are again |
|
|
1195 | hash-references. The keys of those hash-references is the cookie name, and |
|
|
1196 | the value, you guessed it, is another hash-reference, this time with the |
|
|
1197 | key-value pairs from the cookie, except for C<expires> and C<max-age>, |
|
|
1198 | which have been replaced by a C<_expires> key that contains the cookie |
|
|
1199 | expiry timestamp. |
|
|
1200 | |
|
|
1201 | Here is an example of a cookie jar with a single cookie, so you have a |
|
|
1202 | chance of understanding the above paragraph: |
|
|
1203 | |
|
|
1204 | { |
|
|
1205 | version => 1, |
|
|
1206 | "10.0.0.1" => { |
|
|
1207 | "/" => { |
|
|
1208 | "mythweb_id" => { |
|
|
1209 | _expires => 1293917923, |
|
|
1210 | value => "ooRung9dThee3ooyXooM1Ohm", |
|
|
1211 | }, |
|
|
1212 | }, |
|
|
1213 | }, |
|
|
1214 | } |
875 | |
1215 | |
876 | =item $date = AnyEvent::HTTP::format_date $timestamp |
1216 | =item $date = AnyEvent::HTTP::format_date $timestamp |
877 | |
1217 | |
878 | Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP |
1218 | Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP |
879 | Date (RFC 2616). |
1219 | Date (RFC 2616). |
880 | |
1220 | |
881 | =item $timestamp = AnyEvent::HTTP::parse_date $date |
1221 | =item $timestamp = AnyEvent::HTTP::parse_date $date |
882 | |
1222 | |
883 | Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX |
1223 | Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a |
|
|
1224 | bunch of minor variations of those, and returns the corresponding POSIX |
884 | timestamp, or C<undef> if the date cannot be parsed. |
1225 | timestamp, or C<undef> if the date cannot be parsed. |
885 | |
1226 | |
886 | =item $AnyEvent::HTTP::MAX_RECURSE |
1227 | =item $AnyEvent::HTTP::MAX_RECURSE |
887 | |
1228 | |
888 | The default value for the C<recurse> request parameter (default: C<10>). |
1229 | The default value for the C<recurse> request parameter (default: C<10>). |
|
|
1230 | |
|
|
1231 | =item $AnyEvent::HTTP::TIMEOUT |
|
|
1232 | |
|
|
1233 | The default timeout for conenction operations (default: C<300>). |
889 | |
1234 | |
890 | =item $AnyEvent::HTTP::USERAGENT |
1235 | =item $AnyEvent::HTTP::USERAGENT |
891 | |
1236 | |
892 | The default value for the C<User-Agent> header (the default is |
1237 | The default value for the C<User-Agent> header (the default is |
893 | C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
1238 | C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
894 | |
1239 | |
895 | =item $AnyEvent::HTTP::MAX_PER_HOST |
1240 | =item $AnyEvent::HTTP::MAX_PER_HOST |
896 | |
1241 | |
897 | The maximum number of concurrent connections to the same host (identified |
1242 | The maximum number of concurrent connections to the same host (identified |
898 | by the hostname). If the limit is exceeded, then the additional requests |
1243 | by the hostname). If the limit is exceeded, then the additional requests |
899 | are queued until previous connections are closed. |
1244 | are queued until previous connections are closed. Both persistent and |
|
|
1245 | non-persistent connections are counted in this limit. |
900 | |
1246 | |
901 | The default value for this is C<4>, and it is highly advisable to not |
1247 | The default value for this is C<4>, and it is highly advisable to not |
902 | increase it. |
1248 | increase it much. |
|
|
1249 | |
|
|
1250 | For comparison: the RFC's recommend 4 non-persistent or 2 persistent |
|
|
1251 | connections, older browsers used 2, newers (such as firefox 3) typically |
|
|
1252 | use 6, and Opera uses 8 because like, they have the fastest browser and |
|
|
1253 | give a shit for everybody else on the planet. |
|
|
1254 | |
|
|
1255 | =item $AnyEvent::HTTP::PERSISTENT_TIMEOUT |
|
|
1256 | |
|
|
1257 | The time after which idle persistent conenctions get closed by |
|
|
1258 | AnyEvent::HTTP (default: C<3>). |
903 | |
1259 | |
904 | =item $AnyEvent::HTTP::ACTIVE |
1260 | =item $AnyEvent::HTTP::ACTIVE |
905 | |
1261 | |
906 | The number of active connections. This is not the number of currently |
1262 | The number of active connections. This is not the number of currently |
907 | running requests, but the number of currently open and non-idle TCP |
1263 | running requests, but the number of currently open and non-idle TCP |
908 | connections. This number of can be useful for load-leveling. |
1264 | connections. This number can be useful for load-leveling. |
909 | |
1265 | |
910 | =back |
1266 | =back |
911 | |
1267 | |
912 | =cut |
1268 | =cut |
913 | |
1269 | |
… | |
… | |
928 | sub parse_date($) { |
1284 | sub parse_date($) { |
929 | my ($date) = @_; |
1285 | my ($date) = @_; |
930 | |
1286 | |
931 | my ($d, $m, $y, $H, $M, $S); |
1287 | my ($d, $m, $y, $H, $M, $S); |
932 | |
1288 | |
933 | if ($date =~ /^[A-Z][a-z][a-z], ([0-9][0-9]) ([A-Z][a-z][a-z]) ([0-9][0-9][0-9][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) GMT$/) { |
1289 | if ($date =~ /^[A-Z][a-z][a-z]+, ([0-9][0-9]?)[\- ]([A-Z][a-z][a-z])[\- ]([0-9][0-9][0-9][0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) GMT$/) { |
934 | # RFC 822/1123, required by RFC 2616 |
1290 | # RFC 822/1123, required by RFC 2616 (with " ") |
|
|
1291 | # cookie dates (with "-") |
|
|
1292 | |
935 | ($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6); |
1293 | ($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6); |
936 | |
1294 | |
937 | } elsif ($date =~ /^[A-Z][a-z]+, ([0-9][0-9])-([A-Z][a-z][a-z])-([0-9][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) GMT$/) { |
1295 | } elsif ($date =~ /^[A-Z][a-z][a-z]+, ([0-9][0-9]?)-([A-Z][a-z][a-z])-([0-9][0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) GMT$/) { |
938 | # RFC 850 |
1296 | # RFC 850 |
939 | ($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6); |
1297 | ($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6); |
940 | |
1298 | |
941 | } elsif ($date =~ /^[A-Z][a-z][a-z] ([A-Z][a-z][a-z]) ([0-9 ][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9]) ([0-9][0-9][0-9][0-9])$/) { |
1299 | } elsif ($date =~ /^[A-Z][a-z][a-z]+ ([A-Z][a-z][a-z]) ([0-9 ]?[0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) ([0-9][0-9][0-9][0-9])$/) { |
942 | # ISO C's asctime |
1300 | # ISO C's asctime |
943 | ($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5); |
1301 | ($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5); |
944 | } |
1302 | } |
945 | # other formats fail in the loop below |
1303 | # other formats fail in the loop below |
946 | |
1304 | |
… | |
… | |
954 | undef |
1312 | undef |
955 | } |
1313 | } |
956 | |
1314 | |
957 | sub set_proxy($) { |
1315 | sub set_proxy($) { |
958 | if (length $_[0]) { |
1316 | if (length $_[0]) { |
959 | $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix |
1317 | $_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix |
960 | or Carp::croak "$_[0]: invalid proxy URL"; |
1318 | or Carp::croak "$_[0]: invalid proxy URL"; |
961 | $PROXY = [$2, $3 || 3128, $1] |
1319 | $PROXY = [$2, $3 || 3128, $1] |
962 | } else { |
1320 | } else { |
963 | undef $PROXY; |
1321 | undef $PROXY; |
964 | } |
1322 | } |
… | |
… | |
967 | # initialise proxy from environment |
1325 | # initialise proxy from environment |
968 | eval { |
1326 | eval { |
969 | set_proxy $ENV{http_proxy}; |
1327 | set_proxy $ENV{http_proxy}; |
970 | }; |
1328 | }; |
971 | |
1329 | |
|
|
1330 | =head2 SHOWCASE |
|
|
1331 | |
|
|
1332 | This section contaisn some more elaborate "real-world" examples or code |
|
|
1333 | snippets. |
|
|
1334 | |
|
|
1335 | =head2 HTTP/1.1 FILE DOWNLOAD |
|
|
1336 | |
|
|
1337 | Downloading files with HTTP can be quite tricky, especially when something |
|
|
1338 | goes wrong and you want to resume. |
|
|
1339 | |
|
|
1340 | Here is a function that initiates and resumes a download. It uses the |
|
|
1341 | last modified time to check for file content changes, and works with many |
|
|
1342 | HTTP/1.0 servers as well, and usually falls back to a complete re-download |
|
|
1343 | on older servers. |
|
|
1344 | |
|
|
1345 | It calls the completion callback with either C<undef>, which means a |
|
|
1346 | nonretryable error occured, C<0> when the download was partial and should |
|
|
1347 | be retried, and C<1> if it was successful. |
|
|
1348 | |
|
|
1349 | use AnyEvent::HTTP; |
|
|
1350 | |
|
|
1351 | sub download($$$) { |
|
|
1352 | my ($url, $file, $cb) = @_; |
|
|
1353 | |
|
|
1354 | open my $fh, "+<", $file |
|
|
1355 | or die "$file: $!"; |
|
|
1356 | |
|
|
1357 | my %hdr; |
|
|
1358 | my $ofs = 0; |
|
|
1359 | |
|
|
1360 | warn stat $fh; |
|
|
1361 | warn -s _; |
|
|
1362 | if (stat $fh and -s _) { |
|
|
1363 | $ofs = -s _; |
|
|
1364 | warn "-s is ", $ofs;#d# |
|
|
1365 | $hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9]; |
|
|
1366 | $hdr{"range"} = "bytes=$ofs-"; |
|
|
1367 | } |
|
|
1368 | |
|
|
1369 | http_get $url, |
|
|
1370 | headers => \%hdr, |
|
|
1371 | on_header => sub { |
|
|
1372 | my ($hdr) = @_; |
|
|
1373 | |
|
|
1374 | if ($hdr->{Status} == 200 && $ofs) { |
|
|
1375 | # resume failed |
|
|
1376 | truncate $fh, $ofs = 0; |
|
|
1377 | } |
|
|
1378 | |
|
|
1379 | sysseek $fh, $ofs, 0; |
|
|
1380 | |
|
|
1381 | 1 |
|
|
1382 | }, |
|
|
1383 | on_body => sub { |
|
|
1384 | my ($data, $hdr) = @_; |
|
|
1385 | |
|
|
1386 | if ($hdr->{Status} =~ /^2/) { |
|
|
1387 | length $data == syswrite $fh, $data |
|
|
1388 | or return; # abort on write errors |
|
|
1389 | } |
|
|
1390 | |
|
|
1391 | 1 |
|
|
1392 | }, |
|
|
1393 | sub { |
|
|
1394 | my (undef, $hdr) = @_; |
|
|
1395 | |
|
|
1396 | my $status = $hdr->{Status}; |
|
|
1397 | |
|
|
1398 | if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) { |
|
|
1399 | utime $fh, $time, $time; |
|
|
1400 | } |
|
|
1401 | |
|
|
1402 | if ($status == 200 || $status == 206 || $status == 416) { |
|
|
1403 | # download ok || resume ok || file already fully downloaded |
|
|
1404 | $cb->(1, $hdr); |
|
|
1405 | |
|
|
1406 | } elsif ($status == 412) { |
|
|
1407 | # file has changed while resuming, delete and retry |
|
|
1408 | unlink $file; |
|
|
1409 | $cb->(0, $hdr); |
|
|
1410 | |
|
|
1411 | } elsif ($status == 500 or $status == 503 or $status =~ /^59/) { |
|
|
1412 | # retry later |
|
|
1413 | $cb->(0, $hdr); |
|
|
1414 | |
|
|
1415 | } else { |
|
|
1416 | $cb->(undef, $hdr); |
|
|
1417 | } |
|
|
1418 | } |
|
|
1419 | ; |
|
|
1420 | } |
|
|
1421 | |
|
|
1422 | download "http://server/somelargefile", "/tmp/somelargefile", sub { |
|
|
1423 | if ($_[0]) { |
|
|
1424 | print "OK!\n"; |
|
|
1425 | } elsif (defined $_[0]) { |
|
|
1426 | print "please retry later\n"; |
|
|
1427 | } else { |
|
|
1428 | print "ERROR\n"; |
|
|
1429 | } |
|
|
1430 | }; |
|
|
1431 | |
972 | =head2 SOCKS PROXIES |
1432 | =head3 SOCKS PROXIES |
973 | |
1433 | |
974 | Socks proxies are not directly supported by AnyEvent::HTTP. You can |
1434 | Socks proxies are not directly supported by AnyEvent::HTTP. You can |
975 | compile your perl to support socks, or use an external program such as |
1435 | compile your perl to support socks, or use an external program such as |
976 | F<socksify> (dante) or F<tsocks> to make your program use a socks proxy |
1436 | F<socksify> (dante) or F<tsocks> to make your program use a socks proxy |
977 | transparently. |
1437 | transparently. |