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41 | use strict; |
41 | use strict; |
42 | no warnings; |
42 | no warnings; |
43 | |
43 | |
44 | use Errno (); |
44 | use Errno (); |
45 | |
45 | |
46 | use AnyEvent 4.452 (); |
46 | use AnyEvent 5.0 (); |
47 | use AnyEvent::Util (); |
47 | use AnyEvent::Util (); |
48 | use AnyEvent::Socket (); |
48 | use AnyEvent::Socket (); |
49 | use AnyEvent::Handle (); |
49 | use AnyEvent::Handle (); |
50 | |
50 | |
51 | use base Exporter::; |
51 | use base Exporter::; |
52 | |
52 | |
53 | our $VERSION = '1.12'; |
53 | our $VERSION = '1.44'; |
54 | |
54 | |
55 | our @EXPORT = qw(http_get http_post http_head http_request); |
55 | our @EXPORT = qw(http_get http_post http_head http_request); |
56 | |
56 | |
57 | our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
57 | our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
58 | our $MAX_RECURSE = 10; |
58 | our $MAX_RECURSE = 10; |
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138 | |
138 | |
139 | =item headers => hashref |
139 | =item headers => hashref |
140 | |
140 | |
141 | The request headers to use. Currently, C<http_request> may provide its |
141 | The request headers to use. Currently, C<http_request> may provide its |
142 | own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers |
142 | own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers |
143 | and will provide defaults for C<User-Agent:> and C<Referer:>. |
143 | and will provide defaults for C<User-Agent:> and C<Referer:> (this can be |
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144 | suppressed by using C<undef> for these headers in which case they won't be |
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145 | sent at all). |
144 | |
146 | |
145 | =item timeout => $seconds |
147 | =item timeout => $seconds |
146 | |
148 | |
147 | The time-out to use for various stages - each connect attempt will reset |
149 | The time-out to use for various stages - each connect attempt will reset |
148 | the timeout, as will read or write activity. Default timeout is 5 minutes. |
150 | the timeout, as will read or write activity, i.e. this is not an overall |
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151 | timeout. |
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152 | |
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153 | Default timeout is 5 minutes. |
149 | |
154 | |
150 | =item proxy => [$host, $port[, $scheme]] or undef |
155 | =item proxy => [$host, $port[, $scheme]] or undef |
151 | |
156 | |
152 | Use the given http proxy for all requests. If not specified, then the |
157 | Use the given http proxy for all requests. If not specified, then the |
153 | default proxy (as specified by C<$ENV{http_proxy}>) is used. |
158 | default proxy (as specified by C<$ENV{http_proxy}>) is used. |
154 | |
159 | |
155 | C<$scheme> must be either missing or C<http> for HTTP, or C<https> for |
160 | C<$scheme> must be either missing, C<http> for HTTP or C<https> for |
156 | HTTPS. |
161 | HTTPS. |
157 | |
162 | |
158 | =item body => $string |
163 | =item body => $string |
159 | |
164 | |
160 | The request body, usually empty. Will be-sent as-is (future versions of |
165 | The request body, usually empty. Will be-sent as-is (future versions of |
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186 | verification) TLS context. |
191 | verification) TLS context. |
187 | |
192 | |
188 | The default for this option is C<low>, which could be interpreted as "give |
193 | The default for this option is C<low>, which could be interpreted as "give |
189 | me the page, no matter what". |
194 | me the page, no matter what". |
190 | |
195 | |
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196 | =item on_prepare => $callback->($fh) |
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197 | |
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198 | In rare cases you need to "tune" the socket before it is used to |
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199 | connect (for exmaple, to bind it on a given IP address). This parameter |
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200 | overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> |
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201 | and behaves exactly the same way (e.g. it has to provide a |
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202 | timeout). See the description for the C<$prepare_cb> argument of |
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203 | C<AnyEvent::Socket::tcp_connect> for details. |
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204 | |
191 | =item on_header => $callback->($headers) |
205 | =item on_header => $callback->($headers) |
192 | |
206 | |
193 | When specified, this callback will be called with the header hash as soon |
207 | When specified, this callback will be called with the header hash as soon |
194 | as headers have been successfully received from the remote server (not on |
208 | as headers have been successfully received from the remote server (not on |
195 | locally-generated errors). |
209 | locally-generated errors). |
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221 | This callback is useful when the data is too large to be held in memory |
235 | This callback is useful when the data is too large to be held in memory |
222 | (so the callback writes it to a file) or when only some information should |
236 | (so the callback writes it to a file) or when only some information should |
223 | be extracted, or when the body should be processed incrementally. |
237 | be extracted, or when the body should be processed incrementally. |
224 | |
238 | |
225 | It is usually preferred over doing your own body handling via |
239 | It is usually preferred over doing your own body handling via |
226 | C<want_body_handle>. |
240 | C<want_body_handle>, but in case of streaming APIs, where HTTP is |
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241 | only used to create a connection, C<want_body_handle> is the better |
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242 | alternative, as it allows you to install your own event handler, reducing |
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243 | resource usage. |
227 | |
244 | |
228 | =item want_body_handle => $enable |
245 | =item want_body_handle => $enable |
229 | |
246 | |
230 | When enabled (default is disabled), the behaviour of AnyEvent::HTTP |
247 | When enabled (default is disabled), the behaviour of AnyEvent::HTTP |
231 | changes considerably: after parsing the headers, and instead of |
248 | changes considerably: after parsing the headers, and instead of |
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243 | This is useful with some push-type services, where, after the initial |
260 | This is useful with some push-type services, where, after the initial |
244 | headers, an interactive protocol is used (typical example would be the |
261 | headers, an interactive protocol is used (typical example would be the |
245 | push-style twitter API which starts a JSON/XML stream). |
262 | push-style twitter API which starts a JSON/XML stream). |
246 | |
263 | |
247 | If you think you need this, first have a look at C<on_body>, to see if |
264 | If you think you need this, first have a look at C<on_body>, to see if |
248 | that doesn'T solve your problem in a better way. |
265 | that doesn't solve your problem in a better way. |
249 | |
266 | |
250 | =back |
267 | =back |
251 | |
268 | |
252 | Example: make a simple HTTP GET request for http://www.nethype.de/ |
269 | Example: make a simple HTTP GET request for http://www.nethype.de/ |
253 | |
270 | |
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309 | push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
326 | push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
310 | |
327 | |
311 | _slot_schedule $_[0]; |
328 | _slot_schedule $_[0]; |
312 | } |
329 | } |
313 | |
330 | |
314 | our $qr_nl = qr<\015?\012>; |
331 | our $qr_nl = qr{\015?\012}; |
315 | our $qr_nlnl = qr<\015?\012\015?\012>; |
332 | our $qr_nlnl = qr{(?<![^\012])\015?\012}; |
316 | |
333 | |
317 | our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; |
334 | our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; |
318 | our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; |
335 | our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; |
319 | |
336 | |
320 | sub http_request($$@) { |
337 | sub http_request($$@) { |
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355 | or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); |
372 | or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); |
356 | |
373 | |
357 | my $uhost = $1; |
374 | my $uhost = $1; |
358 | $uport = $2 if defined $2; |
375 | $uport = $2 if defined $2; |
359 | |
376 | |
360 | $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost"; |
377 | $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" |
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378 | unless exists $hdr{host}; |
361 | |
379 | |
362 | $uhost =~ s/^\[(.*)\]$/$1/; |
380 | $uhost =~ s/^\[(.*)\]$/$1/; |
363 | $upath .= "?$query" if length $query; |
381 | $upath .= "?$query" if length $query; |
364 | |
382 | |
365 | $upath =~ s%^/?%/%; |
383 | $upath =~ s%^/?%/%; |
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398 | my ($rhost, $rport, $rscheme, $rpath); # request host, port, path |
416 | my ($rhost, $rport, $rscheme, $rpath); # request host, port, path |
399 | |
417 | |
400 | if ($proxy) { |
418 | if ($proxy) { |
401 | ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); |
419 | ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); |
402 | |
420 | |
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421 | $rscheme = "http" unless defined $rscheme; |
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422 | |
403 | # don't support https requests over https-proxy transport, |
423 | # don't support https requests over https-proxy transport, |
404 | # can't be done with tls as spec'ed, unless you double-encrypt. |
424 | # can't be done with tls as spec'ed, unless you double-encrypt. |
405 | $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; |
425 | $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; |
406 | } else { |
426 | } else { |
407 | ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); |
427 | ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); |
408 | } |
428 | } |
409 | |
429 | |
410 | $hdr{"user-agent"} ||= $USERAGENT; |
430 | # leave out fragment and query string, just a heuristic |
411 | $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic |
431 | $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer}; |
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432 | $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"}; |
412 | |
433 | |
413 | $hdr{"content-length"} = length $arg{body}; |
434 | $hdr{"content-length"} = length $arg{body} |
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435 | if length $arg{body} || $method ne "GET"; |
414 | |
436 | |
415 | my %state = (connect_guard => 1); |
437 | my %state = (connect_guard => 1); |
416 | |
438 | |
417 | _get_slot $uhost, sub { |
439 | _get_slot $uhost, sub { |
418 | $state{slot_guard} = shift; |
440 | $state{slot_guard} = shift; |
419 | |
441 | |
420 | return unless $state{connect_guard}; |
442 | return unless $state{connect_guard}; |
421 | |
443 | |
422 | $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { |
444 | $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { |
423 | $state{fh} = shift |
445 | $state{fh} = shift |
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446 | or do { |
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447 | my $err = "$!"; |
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448 | %state = (); |
424 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "$!", URL => $url })); |
449 | return $cb->(undef, { Status => 599, Reason => $err, URL => $url }); |
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450 | }; |
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451 | |
425 | pop; # free memory, save a tree |
452 | pop; # free memory, save a tree |
426 | |
453 | |
427 | return unless delete $state{connect_guard}; |
454 | return unless delete $state{connect_guard}; |
428 | |
455 | |
429 | # get handle |
456 | # get handle |
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462 | $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; |
489 | $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; |
463 | |
490 | |
464 | # send request |
491 | # send request |
465 | $state{handle}->push_write ( |
492 | $state{handle}->push_write ( |
466 | "$method $rpath HTTP/1.0\015\012" |
493 | "$method $rpath HTTP/1.0\015\012" |
467 | . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) |
494 | . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) |
468 | . "\015\012" |
495 | . "\015\012" |
469 | . (delete $arg{body}) |
496 | . (delete $arg{body}) |
470 | ); |
497 | ); |
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498 | |
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499 | # return if error occured during push_write() |
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500 | return unless %state; |
471 | |
501 | |
472 | %hdr = (); # reduce memory usage, save a kitten |
502 | %hdr = (); # reduce memory usage, save a kitten |
473 | |
503 | |
474 | # status line |
504 | # status line |
475 | $state{handle}->push_read (line => $qr_nl, sub { |
505 | $state{handle}->push_read (line => $qr_nl, sub { |
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483 | URL => ",$url" |
513 | URL => ",$url" |
484 | ); |
514 | ); |
485 | |
515 | |
486 | # headers, could be optimized a bit |
516 | # headers, could be optimized a bit |
487 | $state{handle}->unshift_read (line => $qr_nlnl, sub { |
517 | $state{handle}->unshift_read (line => $qr_nlnl, sub { |
488 | for ("$_[1]\012") { |
518 | for ("$_[1]") { |
489 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
519 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
490 | |
520 | |
491 | # things seen, not parsed: |
521 | # things seen, not parsed: |
492 | # p3pP="NON CUR OTPi OUR NOR UNI" |
522 | # p3pP="NON CUR OTPi OUR NOR UNI" |
493 | |
523 | |
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590 | |
620 | |
591 | redo if /\G\s*,/gc; |
621 | redo if /\G\s*,/gc; |
592 | } |
622 | } |
593 | } |
623 | } |
594 | |
624 | |
595 | if ($redirect) { |
625 | if ($redirect && exists $hdr{location}) { |
596 | # we ignore any errors, as it is very common to receive |
626 | # we ignore any errors, as it is very common to receive |
597 | # Content-Length != 0 but no actual body |
627 | # Content-Length != 0 but no actual body |
598 | # we also access %hdr, as $_[1] might be an erro |
628 | # we also access %hdr, as $_[1] might be an erro |
599 | http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); |
629 | http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); |
600 | } else { |
630 | } else { |
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689 | }); |
719 | }); |
690 | } else { |
720 | } else { |
691 | &$handle_actual_request; |
721 | &$handle_actual_request; |
692 | } |
722 | } |
693 | |
723 | |
694 | }, sub { |
724 | }, $arg{on_prepare} || sub { $timeout }; |
695 | $timeout |
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696 | }; |
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697 | }; |
725 | }; |
698 | |
726 | |
699 | defined wantarray && AnyEvent::Util::guard { %state = () } |
727 | defined wantarray && AnyEvent::Util::guard { %state = () } |
700 | } |
728 | } |
701 | |
729 | |
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722 | =over 4 |
750 | =over 4 |
723 | |
751 | |
724 | =item AnyEvent::HTTP::set_proxy "proxy-url" |
752 | =item AnyEvent::HTTP::set_proxy "proxy-url" |
725 | |
753 | |
726 | Sets the default proxy server to use. The proxy-url must begin with a |
754 | Sets the default proxy server to use. The proxy-url must begin with a |
727 | string of the form C<http://host:port> (optionally C<https:...>). |
755 | string of the form C<http://host:port> (optionally C<https:...>), croaks |
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756 | otherwise. |
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757 | |
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758 | To clear an already-set proxy, use C<undef>. |
728 | |
759 | |
729 | =item $AnyEvent::HTTP::MAX_RECURSE |
760 | =item $AnyEvent::HTTP::MAX_RECURSE |
730 | |
761 | |
731 | The default value for the C<recurse> request parameter (default: C<10>). |
762 | The default value for the C<recurse> request parameter (default: C<10>). |
732 | |
763 | |
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735 | The default value for the C<User-Agent> header (the default is |
766 | The default value for the C<User-Agent> header (the default is |
736 | C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
767 | C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
737 | |
768 | |
738 | =item $AnyEvent::HTTP::MAX_PER_HOST |
769 | =item $AnyEvent::HTTP::MAX_PER_HOST |
739 | |
770 | |
740 | The maximum number of concurrent conenctions to the same host (identified |
771 | The maximum number of concurrent connections to the same host (identified |
741 | by the hostname). If the limit is exceeded, then the additional requests |
772 | by the hostname). If the limit is exceeded, then the additional requests |
742 | are queued until previous connections are closed. |
773 | are queued until previous connections are closed. |
743 | |
774 | |
744 | The default value for this is C<4>, and it is highly advisable to not |
775 | The default value for this is C<4>, and it is highly advisable to not |
745 | increase it. |
776 | increase it. |
… | |
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753 | =back |
784 | =back |
754 | |
785 | |
755 | =cut |
786 | =cut |
756 | |
787 | |
757 | sub set_proxy($) { |
788 | sub set_proxy($) { |
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|
789 | if (length $_[0]) { |
758 | $PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix; |
790 | $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix |
|
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791 | or Carp::croak "$_[0]: invalid proxy URL"; |
|
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792 | $PROXY = [$2, $3 || 3128, $1] |
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793 | } else { |
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794 | undef $PROXY; |
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795 | } |
759 | } |
796 | } |
760 | |
797 | |
761 | # initialise proxy from environment |
798 | # initialise proxy from environment |
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799 | eval { |
762 | set_proxy $ENV{http_proxy}; |
800 | set_proxy $ENV{http_proxy}; |
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801 | }; |
763 | |
802 | |
764 | =head1 SEE ALSO |
803 | =head1 SEE ALSO |
765 | |
804 | |
766 | L<AnyEvent>. |
805 | L<AnyEvent>. |
767 | |
806 | |