| … | |
… | |
| 2 | |
2 | |
| 3 | no warnings; |
3 | no warnings; |
| 4 | use strict; |
4 | use strict; |
| 5 | |
5 | |
| 6 | use AnyEvent (); |
6 | use AnyEvent (); |
| 7 | use AnyEvent::Util (); |
7 | use AnyEvent::Util qw(WSAWOULDBLOCK); |
| 8 | use Scalar::Util (); |
8 | use Scalar::Util (); |
| 9 | use Carp (); |
9 | use Carp (); |
| 10 | use Fcntl (); |
10 | use Fcntl (); |
| 11 | use Errno qw/EAGAIN EINTR/; |
11 | use Errno qw/EAGAIN EINTR/; |
| 12 | |
12 | |
| 13 | =head1 NAME |
13 | =head1 NAME |
| 14 | |
14 | |
| 15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
| 16 | |
16 | |
| 17 | This module is experimental. |
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|
| 18 | |
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|
| 19 | =cut |
17 | =cut |
| 20 | |
18 | |
| 21 | our $VERSION = '0.04'; |
19 | our $VERSION = '0.04'; |
| 22 | |
20 | |
| 23 | =head1 SYNOPSIS |
21 | =head1 SYNOPSIS |
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… | |
| 25 | use AnyEvent; |
23 | use AnyEvent; |
| 26 | use AnyEvent::Handle; |
24 | use AnyEvent::Handle; |
| 27 | |
25 | |
| 28 | my $cv = AnyEvent->condvar; |
26 | my $cv = AnyEvent->condvar; |
| 29 | |
27 | |
| 30 | my $ae_fh = AnyEvent::Handle->new (fh => \*STDIN); |
28 | my $handle = |
| 31 | |
|
|
| 32 | #TODO |
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|
| 33 | |
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|
| 34 | # or use the constructor to pass the callback: |
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|
| 35 | |
|
|
| 36 | my $ae_fh2 = |
|
|
| 37 | AnyEvent::Handle->new ( |
29 | AnyEvent::Handle->new ( |
| 38 | fh => \*STDIN, |
30 | fh => \*STDIN, |
| 39 | on_eof => sub { |
31 | on_eof => sub { |
| 40 | $cv->broadcast; |
32 | $cv->broadcast; |
| 41 | }, |
33 | }, |
| 42 | #TODO |
|
|
| 43 | ); |
34 | ); |
| 44 | |
35 | |
| 45 | $cv->wait; |
36 | # send some request line |
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|
37 | $handle->push_write ("getinfo\015\012"); |
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|
38 | |
|
|
39 | # read the response line |
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|
40 | $handle->push_read (line => sub { |
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41 | my ($handle, $line) = @_; |
|
|
42 | warn "read line <$line>\n"; |
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|
43 | $cv->send; |
|
|
44 | }); |
|
|
45 | |
|
|
46 | $cv->recv; |
| 46 | |
47 | |
| 47 | =head1 DESCRIPTION |
48 | =head1 DESCRIPTION |
| 48 | |
49 | |
| 49 | This module is a helper module to make it easier to do event-based I/O on |
50 | This module is a helper module to make it easier to do event-based I/O on |
| 50 | filehandles. For utility functions for doing non-blocking connects and accepts |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
| … | |
… | |
| 288 | |
289 | |
| 289 | sub _drain_wbuf { |
290 | sub _drain_wbuf { |
| 290 | my ($self) = @_; |
291 | my ($self) = @_; |
| 291 | |
292 | |
| 292 | if (!$self->{ww} && length $self->{wbuf}) { |
293 | if (!$self->{ww} && length $self->{wbuf}) { |
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|
294 | |
| 293 | Scalar::Util::weaken $self; |
295 | Scalar::Util::weaken $self; |
|
|
296 | |
| 294 | my $cb = sub { |
297 | my $cb = sub { |
| 295 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
298 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
| 296 | |
299 | |
| 297 | if ($len >= 0) { |
300 | if ($len >= 0) { |
| 298 | substr $self->{wbuf}, 0, $len, ""; |
301 | substr $self->{wbuf}, 0, $len, ""; |
| … | |
… | |
| 300 | $self->{on_drain}($self) |
303 | $self->{on_drain}($self) |
| 301 | if $self->{low_water_mark} >= length $self->{wbuf} |
304 | if $self->{low_water_mark} >= length $self->{wbuf} |
| 302 | && $self->{on_drain}; |
305 | && $self->{on_drain}; |
| 303 | |
306 | |
| 304 | delete $self->{ww} unless length $self->{wbuf}; |
307 | delete $self->{ww} unless length $self->{wbuf}; |
| 305 | } elsif ($! != EAGAIN && $! != EINTR) { |
308 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAWOULDBLOCK) { |
| 306 | $self->error; |
309 | $self->error; |
| 307 | } |
310 | } |
| 308 | }; |
311 | }; |
| 309 | |
312 | |
|
|
313 | # try to write data immediately |
|
|
314 | $cb->(); |
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|
315 | |
|
|
316 | # if still data left in wbuf, we need to poll |
| 310 | $self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb); |
317 | $self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
| 311 | |
318 | if length $self->{wbuf}; |
| 312 | $cb->($self); |
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|
| 313 | }; |
319 | }; |
| 314 | } |
320 | } |
| 315 | |
321 | |
| 316 | our %WH; |
322 | our %WH; |
| 317 | |
323 | |
| … | |
… | |
| 727 | |
733 | |
| 728 | 1 |
734 | 1 |
| 729 | } |
735 | } |
| 730 | }; |
736 | }; |
| 731 | |
737 | |
|
|
738 | =item regex => $accept[, $reject[, $skip], $cb->($data) |
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|
739 | |
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|
740 | Makes a regex match against the regex object C<$accept> and returns |
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|
741 | everything up to and including the match. |
|
|
742 | |
|
|
743 | Example: read a single line terminated by '\n'. |
|
|
744 | |
|
|
745 | $handle->push_read (regex => qr<\n>, sub { ... }); |
|
|
746 | |
|
|
747 | If C<$reject> is given and not undef, then it determines when the data is |
|
|
748 | to be rejected: it is matched against the data when the C<$accept> regex |
|
|
749 | does not match and generates an C<EBADMSG> error when it matches. This is |
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|
750 | useful to quickly reject wrong data (to avoid waiting for a timeout or a |
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|
751 | receive buffer overflow). |
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752 | |
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|
753 | Example: expect a single decimal number followed by whitespace, reject |
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754 | anything else (not the use of an anchor). |
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755 | |
|
|
756 | $handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... }); |
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757 | |
|
|
758 | If C<$skip> is given and not C<undef>, then it will be matched against |
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|
759 | the receive buffer when neither C<$accept> nor C<$reject> match, |
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|
760 | and everything preceding and including the match will be accepted |
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|
761 | unconditionally. This is useful to skip large amounts of data that you |
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|
762 | know cannot be matched, so that the C<$accept> or C<$reject> regex do not |
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|
763 | have to start matching from the beginning. This is purely an optimisation |
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|
764 | and is usually worth only when you expect more than a few kilobytes. |
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|
765 | |
|
|
766 | Example: expect a http header, which ends at C<\015\012\015\012>. Since we |
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|
767 | expect the header to be very large (it isn't in practise, but...), we use |
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|
768 | a skip regex to skip initial portions. The skip regex is tricky in that |
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|
769 | it only accepts something not ending in either \015 or \012, as these are |
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|
770 | required for the accept regex. |
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|
771 | |
|
|
772 | $handle->push_read (regex => |
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773 | qr<\015\012\015\012>, |
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|
774 | undef, # no reject |
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|
775 | qr<^.*[^\015\012]>, |
|
|
776 | sub { ... }); |
|
|
777 | |
|
|
778 | =cut |
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|
779 | |
|
|
780 | register_read_type regex => sub { |
|
|
781 | my ($self, $cb, $accept, $reject, $skip) = @_; |
|
|
782 | |
|
|
783 | my $data; |
|
|
784 | my $rbuf = \$self->{rbuf}; |
|
|
785 | |
|
|
786 | sub { |
|
|
787 | # accept |
|
|
788 | if ($$rbuf =~ $accept) { |
|
|
789 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
790 | $cb->($self, $data); |
|
|
791 | return 1; |
|
|
792 | } |
|
|
793 | |
|
|
794 | # reject |
|
|
795 | if ($reject && $$rbuf =~ $reject) { |
|
|
796 | $! = &Errno::EBADMSG; |
|
|
797 | $self->error; |
|
|
798 | } |
|
|
799 | |
|
|
800 | # skip |
|
|
801 | if ($skip && $$rbuf =~ $skip) { |
|
|
802 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
803 | } |
|
|
804 | |
|
|
805 | () |
|
|
806 | } |
|
|
807 | }; |
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|
808 | |
| 732 | =back |
809 | =back |
| 733 | |
810 | |
| 734 | =item AnyEvent::Handle::register_read_type type => $coderef->($self, $cb, @args) |
811 | =item AnyEvent::Handle::register_read_type type => $coderef->($self, $cb, @args) |
| 735 | |
812 | |
| 736 | This function (not method) lets you add your own types to C<push_read>. |
813 | This function (not method) lets you add your own types to C<push_read>. |
| … | |
… | |
| 786 | } elsif (defined $len) { |
863 | } elsif (defined $len) { |
| 787 | delete $self->{rw}; |
864 | delete $self->{rw}; |
| 788 | $self->{eof} = 1; |
865 | $self->{eof} = 1; |
| 789 | $self->_drain_rbuf; |
866 | $self->_drain_rbuf; |
| 790 | |
867 | |
| 791 | } elsif ($! != EAGAIN && $! != EINTR) { |
868 | } elsif ($! != EAGAIN && $! != EINTR && $! != &AnyEvent::Util::WSAWOULDBLOCK) { |
| 792 | return $self->error; |
869 | return $self->error; |
| 793 | } |
870 | } |
| 794 | }); |
871 | }); |
| 795 | } |
872 | } |
| 796 | } |
873 | } |
| … | |
… | |
| 862 | # but the openssl maintainers basically said: "trust us, it just works". |
939 | # but the openssl maintainers basically said: "trust us, it just works". |
| 863 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
940 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
| 864 | # and mismaintained ssleay-module doesn't even offer them). |
941 | # and mismaintained ssleay-module doesn't even offer them). |
| 865 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
942 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
| 866 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
943 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
| 867 | (eval { Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
944 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
| 868 | | (eval { Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
945 | | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
| 869 | |
946 | |
| 870 | $self->{tls_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
947 | $self->{tls_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
| 871 | $self->{tls_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
948 | $self->{tls_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
| 872 | |
949 | |
| 873 | Net::SSLeay::set_bio ($ssl, $self->{tls_rbio}, $self->{tls_wbio}); |
950 | Net::SSLeay::set_bio ($ssl, $self->{tls_rbio}, $self->{tls_wbio}); |
