… | |
… | |
94 | C<http_request> returns a "cancellation guard" - you have to keep the |
94 | 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 |
95 | 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. |
96 | destroyed before the callback is called, the request will be cancelled. |
97 | |
97 | |
98 | The callback will be called with the response body data as first argument |
98 | 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 |
99 | (or C<undef> if an error occured), and a hash-ref with response headers |
100 | second argument. |
100 | (and trailers) as second argument. |
101 | |
101 | |
102 | All the headers in that hash are lowercased. In addition to the response |
102 | All the headers in that hash are lowercased. In addition to the response |
103 | headers, the "pseudo-headers" (uppercase to avoid clashing with possible |
103 | headers, the "pseudo-headers" (uppercase to avoid clashing with possible |
104 | response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the |
104 | 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 |
105 | three parts of the HTTP Status-Line of the same name. If an error occurs |
… | |
… | |
150 | Whether to recurse requests or not, e.g. on redirects, authentication |
150 | Whether to recurse requests or not, e.g. on redirects, authentication |
151 | retries and so on, and how often to do so. |
151 | retries and so on, and how often to do so. |
152 | |
152 | |
153 | =item headers => hashref |
153 | =item headers => hashref |
154 | |
154 | |
155 | The request headers to use. Currently, C<http_request> may provide its |
155 | 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 |
156 | 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 |
157 | will provide defaults for C<TE:>, C<Referer:> and C<User-Agent:> (this can |
158 | suppressed by using C<undef> for these headers in which case they won't be |
158 | be suppressed by using C<undef> for these headers in which case they won't |
159 | sent at all). |
159 | be sent at all). |
160 | |
160 | |
161 | =item timeout => $seconds |
161 | =item timeout => $seconds |
162 | |
162 | |
163 | The time-out to use for various stages - each connect attempt will reset |
163 | The time-out to use for various stages - each connect attempt will reset |
164 | the timeout, as will read or write activity, i.e. this is not an overall |
164 | the timeout, as will read or write activity, i.e. this is not an overall |
… | |
… | |
174 | C<$scheme> must be either missing, C<http> for HTTP or C<https> for |
174 | C<$scheme> must be either missing, C<http> for HTTP or C<https> for |
175 | HTTPS. |
175 | HTTPS. |
176 | |
176 | |
177 | =item body => $string |
177 | =item body => $string |
178 | |
178 | |
179 | The request body, usually empty. Will be-sent as-is (future versions of |
179 | The request body, usually empty. Will be sent as-is (future versions of |
180 | this module might offer more options). |
180 | this module might offer more options). |
181 | |
181 | |
182 | =item cookie_jar => $hash_ref |
182 | =item cookie_jar => $hash_ref |
183 | |
183 | |
184 | Passing this parameter enables (simplified) cookie-processing, loosely |
184 | Passing this parameter enables (simplified) cookie-processing, loosely |
… | |
… | |
240 | |
240 | |
241 | This callback is useful, among other things, to quickly reject unwanted |
241 | 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 |
242 | content, which, if it is supposed to be rare, can be faster than first |
243 | doing a C<HEAD> request. |
243 | doing a C<HEAD> request. |
244 | |
244 | |
|
|
245 | The downside is that cancelling the request makes it impossible to re-use |
|
|
246 | the connection. Also, the C<on_header> callback will not receive any |
|
|
247 | trailer (headers sent after the response body). |
|
|
248 | |
245 | Example: cancel the request unless the content-type is "text/html". |
249 | Example: cancel the request unless the content-type is "text/html". |
246 | |
250 | |
247 | on_header => sub { |
251 | on_header => sub { |
248 | $_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/ |
252 | $_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/ |
249 | }, |
253 | }, |
… | |
… | |
255 | string instead of the body data. |
259 | string instead of the body data. |
256 | |
260 | |
257 | It has to return either true (in which case AnyEvent::HTTP will continue), |
261 | 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 |
262 | or false, in which case AnyEvent::HTTP will cancel the download (and call |
259 | the completion callback with an error code of C<598>). |
263 | the completion callback with an error code of C<598>). |
|
|
264 | |
|
|
265 | The downside to cancelling the request is that it makes it impossible to |
|
|
266 | re-use the connection. |
260 | |
267 | |
261 | This callback is useful when the data is too large to be held in memory |
268 | 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 |
269 | (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. |
270 | be extracted, or when the body should be processed incrementally. |
264 | |
271 | |
… | |
… | |
290 | If you think you need this, first have a look at C<on_body>, to see if |
297 | 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. |
298 | that doesn't solve your problem in a better way. |
292 | |
299 | |
293 | =back |
300 | =back |
294 | |
301 | |
295 | Example: make a simple HTTP GET request for http://www.nethype.de/ |
302 | Example: do a simple HTTP GET request for http://www.nethype.de/ and print |
|
|
303 | the response body. |
296 | |
304 | |
297 | http_request GET => "http://www.nethype.de/", sub { |
305 | http_request GET => "http://www.nethype.de/", sub { |
298 | my ($body, $hdr) = @_; |
306 | my ($body, $hdr) = @_; |
299 | print "$body\n"; |
307 | print "$body\n"; |
300 | }; |
308 | }; |
301 | |
309 | |
302 | Example: make a HTTP HEAD request on https://www.google.com/, use a |
310 | Example: do a HTTP HEAD request on https://www.google.com/, use a |
303 | timeout of 30 seconds. |
311 | timeout of 30 seconds. |
304 | |
312 | |
305 | http_request |
313 | http_request |
306 | GET => "https://www.google.com", |
314 | GET => "https://www.google.com", |
307 | timeout => 30, |
315 | timeout => 30, |
… | |
… | |
310 | use Data::Dumper; |
318 | use Data::Dumper; |
311 | print Dumper $hdr; |
319 | print Dumper $hdr; |
312 | } |
320 | } |
313 | ; |
321 | ; |
314 | |
322 | |
315 | Example: make another simple HTTP GET request, but immediately try to |
323 | Example: do another simple HTTP GET request, but immediately try to |
316 | cancel it. |
324 | cancel it. |
317 | |
325 | |
318 | my $request = http_request GET => "http://www.nethype.de/", sub { |
326 | my $request = http_request GET => "http://www.nethype.de/", sub { |
319 | my ($body, $hdr) = @_; |
327 | my ($body, $hdr) = @_; |
320 | print "$body\n"; |
328 | print "$body\n"; |
… | |
… | |
486 | $hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"}; |
494 | $hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"}; |
487 | |
495 | |
488 | $hdr{"content-length"} = length $arg{body} |
496 | $hdr{"content-length"} = length $arg{body} |
489 | if length $arg{body} || $method ne "GET"; |
497 | if length $arg{body} || $method ne "GET"; |
490 | |
498 | |
491 | $hdr{connection} = "close TE"; |
499 | $hdr{connection} = "close TE"; #1.1 |
492 | $hdr{te} = "trailers" unless exists $hdr{te}; |
500 | $hdr{te} = "trailers" unless exists $hdr{te}; #1.1 |
493 | |
501 | |
494 | my %state = (connect_guard => 1); |
502 | my %state = (connect_guard => 1); |
495 | |
503 | |
496 | _get_slot $uhost, sub { |
504 | _get_slot $uhost, sub { |
497 | $state{slot_guard} = shift; |
505 | $state{slot_guard} = shift; |
… | |
… | |
533 | # ++$KA_COUNT{$_[1]}; |
541 | # ++$KA_COUNT{$_[1]}; |
534 | # $state{handle}{ka_count_guard} = AnyEvent::Util::guard { |
542 | # $state{handle}{ka_count_guard} = AnyEvent::Util::guard { |
535 | # --$KA_COUNT{$_[1]} |
543 | # --$KA_COUNT{$_[1]} |
536 | # }; |
544 | # }; |
537 | # $hdr{connection} = "keep-alive"; |
545 | # $hdr{connection} = "keep-alive"; |
538 | # } else { |
|
|
539 | # delete $hdr{connection}; |
|
|
540 | # } |
546 | # } |
541 | |
547 | |
542 | $state{handle}->starttls ("connect") if $rscheme eq "https"; |
548 | $state{handle}->starttls ("connect") if $rscheme eq "https"; |
543 | |
549 | |
544 | # handle actual, non-tunneled, request |
550 | # handle actual, non-tunneled, request |
… | |
… | |
557 | return unless %state; |
563 | return unless %state; |
558 | |
564 | |
559 | %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use |
565 | %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use |
560 | |
566 | |
561 | # status line and headers |
567 | # status line and headers |
562 | $state{handle}->push_read (line => $qr_nlnl, sub { |
568 | $state{read_response} = sub { |
563 | my $keepalive = pop; |
|
|
564 | |
|
|
565 | for ("$_[1]") { |
569 | for ("$_[1]") { |
566 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
570 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
567 | |
571 | |
568 | /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc |
572 | /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc |
569 | or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" })); |
573 | or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" })); |
|
|
574 | |
|
|
575 | # 100 Continue handling |
|
|
576 | # should not happen as we don't send expect: 100-continue, |
|
|
577 | # but we handle it just in case. |
|
|
578 | # since we send the request body regardless, if we get an error |
|
|
579 | # we are out of-sync, which we currently do NOT handle correctly. |
|
|
580 | return $state{handle}->push_read (line => $qr_nlnl, $state{read_response}) |
|
|
581 | if $2 eq 100; |
570 | |
582 | |
571 | push @pseudo, |
583 | push @pseudo, |
572 | HTTPVersion => $1, |
584 | HTTPVersion => $1, |
573 | Status => $2, |
585 | Status => $2, |
574 | Reason => $3, |
586 | Reason => $3, |
… | |
… | |
614 | $redirect = 1; |
626 | $redirect = 1; |
615 | } |
627 | } |
616 | } |
628 | } |
617 | |
629 | |
618 | my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive]) |
630 | my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive]) |
|
|
631 | my $keepalive = pop; |
|
|
632 | |
619 | $state{handle}->destroy if $state{handle}; |
633 | $state{handle}->destroy if $state{handle}; |
620 | %state = (); |
634 | %state = (); |
621 | |
635 | |
622 | if (defined $_[1]) { |
636 | if (defined $_[1]) { |
623 | $hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1]; |
637 | $hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1]; |
… | |
… | |
712 | $_[0]->on_error (undef); |
726 | $_[0]->on_error (undef); |
713 | $_[0]->on_read (undef); |
727 | $_[0]->on_read (undef); |
714 | |
728 | |
715 | $finish->(delete $state{handle}); |
729 | $finish->(delete $state{handle}); |
716 | |
730 | |
717 | } elsif ($hdr{"transfer-encoding"} =~ /chunked/) { |
731 | } elsif ($hdr{"transfer-encoding"} =~ /\bchunked\b/i) { |
|
|
732 | my $cl = 0; |
718 | my $body = undef; |
733 | my $body = undef; |
719 | my $on_body = $arg{on_body} || sub { $body .= shift; 1 }; |
734 | my $on_body = $arg{on_body} || sub { $body .= shift; 1 }; |
720 | |
735 | |
721 | $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) }); |
736 | $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) }); |
722 | |
737 | |
… | |
… | |
725 | or $finish->(undef, 599 => "Garbled chunked transfer encoding"); |
740 | or $finish->(undef, 599 => "Garbled chunked transfer encoding"); |
726 | |
741 | |
727 | my $len = hex $1; |
742 | my $len = hex $1; |
728 | |
743 | |
729 | if ($len) { |
744 | if ($len) { |
|
|
745 | $cl += $len; |
|
|
746 | |
730 | $_[0]->push_read (chunk => hex $1, sub { |
747 | $_[0]->push_read (chunk => $len, sub { |
731 | $on_body->($_[1], \%hdr) |
748 | $on_body->($_[1], \%hdr) |
732 | or return $finish->(undef, 598 => "Request cancelled by on_body"); |
749 | or return $finish->(undef, 598 => "Request cancelled by on_body"); |
733 | |
750 | |
734 | $_[0]->push_read (line => sub { |
751 | $_[0]->push_read (line => sub { |
735 | length $_[1] |
752 | length $_[1] |
736 | and return $finish->(undef, 599 => "Garbled chunked transfer encoding"); |
753 | and return $finish->(undef, 599 => "Garbled chunked transfer encoding"); |
737 | $_[0]->push_read (line => $read_chunk); |
754 | $_[0]->push_read (line => $read_chunk); |
738 | }); |
755 | }); |
739 | }); |
756 | }); |
740 | } else { |
757 | } else { |
|
|
758 | $hdr{"content-length"} ||= $cl; |
|
|
759 | |
741 | $_[0]->push_read (line => $qr_nlnl, sub { |
760 | $_[0]->push_read (line => $qr_nlnl, sub { |
742 | if (length $_[1]) { |
761 | if (length $_[1]) { |
743 | for ("$_[1]") { |
762 | for ("$_[1]") { |
744 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
763 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
745 | |
764 | |
… | |
… | |
796 | }); |
815 | }); |
797 | $_[0]->on_read (sub { }); |
816 | $_[0]->on_read (sub { }); |
798 | } |
817 | } |
799 | } |
818 | } |
800 | } |
819 | } |
801 | }); |
820 | }; |
|
|
821 | |
|
|
822 | $state{handle}->push_read (line => $qr_nlnl, $state{read_response}); |
802 | }; |
823 | }; |
803 | |
824 | |
804 | # now handle proxy-CONNECT method |
825 | # now handle proxy-CONNECT method |
805 | if ($proxy && $uscheme eq "https") { |
826 | if ($proxy && $uscheme eq "https") { |
806 | # oh dear, we have to wrap it into a connect request |
827 | # oh dear, we have to wrap it into a connect request |