1 | package AnyEvent::Handle; |
1 | package AnyEvent::Handle; |
2 | |
2 | |
3 | no warnings; |
3 | no warnings; |
4 | use strict; |
4 | use strict qw(subs vars); |
5 | |
5 | |
6 | use AnyEvent (); |
6 | use AnyEvent (); |
7 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
7 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
8 | use Scalar::Util (); |
8 | use Scalar::Util (); |
9 | use Carp (); |
9 | use Carp (); |
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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 | =cut |
17 | =cut |
18 | |
18 | |
19 | our $VERSION = 4.151; |
19 | our $VERSION = 4.232; |
20 | |
20 | |
21 | =head1 SYNOPSIS |
21 | =head1 SYNOPSIS |
22 | |
22 | |
23 | use AnyEvent; |
23 | use AnyEvent; |
24 | use AnyEvent::Handle; |
24 | use AnyEvent::Handle; |
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75 | NOTE: The filehandle will be set to non-blocking (using |
75 | NOTE: The filehandle will be set to non-blocking (using |
76 | AnyEvent::Util::fh_nonblocking). |
76 | AnyEvent::Util::fh_nonblocking). |
77 | |
77 | |
78 | =item on_eof => $cb->($handle) |
78 | =item on_eof => $cb->($handle) |
79 | |
79 | |
80 | Set the callback to be called when an end-of-file condition is detcted, |
80 | Set the callback to be called when an end-of-file condition is detected, |
81 | i.e. in the case of a socket, when the other side has closed the |
81 | i.e. in the case of a socket, when the other side has closed the |
82 | connection cleanly. |
82 | connection cleanly. |
83 | |
83 | |
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84 | For sockets, this just means that the other side has stopped sending data, |
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85 | you can still try to write data, and, in fact, one can return from the eof |
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86 | callback and continue writing data, as only the read part has been shut |
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87 | down. |
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88 | |
84 | While not mandatory, it is highly recommended to set an eof callback, |
89 | While not mandatory, it is I<highly> recommended to set an eof callback, |
85 | otherwise you might end up with a closed socket while you are still |
90 | otherwise you might end up with a closed socket while you are still |
86 | waiting for data. |
91 | waiting for data. |
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92 | |
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93 | If an EOF condition has been detected but no C<on_eof> callback has been |
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94 | set, then a fatal error will be raised with C<$!> set to <0>. |
87 | |
95 | |
88 | =item on_error => $cb->($handle, $fatal) |
96 | =item on_error => $cb->($handle, $fatal) |
89 | |
97 | |
90 | This is the error callback, which is called when, well, some error |
98 | This is the error callback, which is called when, well, some error |
91 | occured, such as not being able to resolve the hostname, failure to |
99 | occured, such as not being able to resolve the hostname, failure to |
92 | connect or a read error. |
100 | connect or a read error. |
93 | |
101 | |
94 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
102 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
95 | fatal errors the handle object will be shut down and will not be |
103 | fatal errors the handle object will be shut down and will not be usable |
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104 | (but you are free to look at the current C< ->rbuf >). Examples of fatal |
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105 | errors are an EOF condition with active (but unsatisifable) read watchers |
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106 | (C<EPIPE>) or I/O errors. |
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107 | |
96 | usable. Non-fatal errors can be retried by simply returning, but it is |
108 | Non-fatal errors can be retried by simply returning, but it is recommended |
97 | recommended to simply ignore this parameter and instead abondon the handle |
109 | to simply ignore this parameter and instead abondon the handle object |
98 | object when this callback is invoked. |
110 | when this callback is invoked. Examples of non-fatal errors are timeouts |
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111 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
99 | |
112 | |
100 | On callback entrance, the value of C<$!> contains the operating system |
113 | On callback entrance, the value of C<$!> contains the operating system |
101 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
114 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
102 | |
115 | |
103 | While not mandatory, it is I<highly> recommended to set this callback, as |
116 | While not mandatory, it is I<highly> recommended to set this callback, as |
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162 | be configured to accept only so-and-so much data that it cannot act on |
175 | be configured to accept only so-and-so much data that it cannot act on |
163 | (for example, when expecting a line, an attacker could send an unlimited |
176 | (for example, when expecting a line, an attacker could send an unlimited |
164 | amount of data without a callback ever being called as long as the line |
177 | amount of data without a callback ever being called as long as the line |
165 | isn't finished). |
178 | isn't finished). |
166 | |
179 | |
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180 | =item autocork => <boolean> |
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181 | |
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182 | When disabled (the default), then C<push_write> will try to immediately |
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183 | write the data to the handle if possible. This avoids having to register |
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184 | a write watcher and wait for the next event loop iteration, but can be |
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185 | inefficient if you write multiple small chunks (this disadvantage is |
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186 | usually avoided by your kernel's nagle algorithm, see C<low_delay>). |
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187 | |
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188 | When enabled, then writes will always be queued till the next event loop |
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189 | iteration. This is efficient when you do many small writes per iteration, |
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190 | but less efficient when you do a single write only. |
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191 | |
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192 | =item no_delay => <boolean> |
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193 | |
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194 | When doing small writes on sockets, your operating system kernel might |
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195 | wait a bit for more data before actually sending it out. This is called |
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196 | the Nagle algorithm, and usually it is beneficial. |
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197 | |
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198 | In some situations you want as low a delay as possible, which cna be |
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199 | accomplishd by setting this option to true. |
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200 | |
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201 | The default is your opertaing system's default behaviour, this option |
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202 | explicitly enables or disables it, if possible. |
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203 | |
167 | =item read_size => <bytes> |
204 | =item read_size => <bytes> |
168 | |
205 | |
169 | The default read block size (the amount of bytes this module will try to read |
206 | The default read block size (the amount of bytes this module will try to read |
170 | during each (loop iteration). Default: C<8192>. |
207 | during each (loop iteration). Default: C<8192>. |
171 | |
208 | |
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201 | You can also provide your own TLS connection object, but you have |
238 | You can also provide your own TLS connection object, but you have |
202 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
239 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
203 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
240 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
204 | AnyEvent::Handle. |
241 | AnyEvent::Handle. |
205 | |
242 | |
206 | See the C<starttls> method if you need to start TLs negotiation later. |
243 | See the C<starttls> method if you need to start TLS negotiation later. |
207 | |
244 | |
208 | =item tls_ctx => $ssl_ctx |
245 | =item tls_ctx => $ssl_ctx |
209 | |
246 | |
210 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
247 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
211 | (unless a connection object was specified directly). If this parameter is |
248 | (unless a connection object was specified directly). If this parameter is |
… | |
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246 | } |
283 | } |
247 | |
284 | |
248 | $self->{_activity} = AnyEvent->now; |
285 | $self->{_activity} = AnyEvent->now; |
249 | $self->_timeout; |
286 | $self->_timeout; |
250 | |
287 | |
251 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
288 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
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289 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
252 | |
290 | |
253 | $self->start_read |
291 | $self->start_read |
254 | if $self->{on_read}; |
292 | if $self->{on_read}; |
255 | |
293 | |
256 | $self |
294 | $self |
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263 | delete $self->{_rw}; |
301 | delete $self->{_rw}; |
264 | delete $self->{_ww}; |
302 | delete $self->{_ww}; |
265 | delete $self->{fh}; |
303 | delete $self->{fh}; |
266 | |
304 | |
267 | $self->stoptls; |
305 | $self->stoptls; |
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306 | |
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307 | delete $self->{on_read}; |
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308 | delete $self->{_queue}; |
268 | } |
309 | } |
269 | |
310 | |
270 | sub _error { |
311 | sub _error { |
271 | my ($self, $errno, $fatal) = @_; |
312 | my ($self, $errno, $fatal) = @_; |
272 | |
313 | |
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318 | |
359 | |
319 | =cut |
360 | =cut |
320 | |
361 | |
321 | sub on_timeout { |
362 | sub on_timeout { |
322 | $_[0]{on_timeout} = $_[1]; |
363 | $_[0]{on_timeout} = $_[1]; |
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364 | } |
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365 | |
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366 | =item $handle->autocork ($boolean) |
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367 | |
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368 | Enables or disables the current autocork behaviour (see C<autocork> |
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369 | constructor argument). |
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370 | |
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371 | =cut |
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372 | |
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373 | =item $handle->no_delay ($boolean) |
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374 | |
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375 | Enables or disables the C<no_delay> setting (see constructor argument of |
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376 | the same name for details). |
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377 | |
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378 | =cut |
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379 | |
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380 | sub no_delay { |
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381 | $_[0]{no_delay} = $_[1]; |
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382 | |
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383 | eval { |
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384 | local $SIG{__DIE__}; |
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385 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]; |
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386 | }; |
323 | } |
387 | } |
324 | |
388 | |
325 | ############################################################################# |
389 | ############################################################################# |
326 | |
390 | |
327 | =item $handle->timeout ($seconds) |
391 | =item $handle->timeout ($seconds) |
… | |
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442 | $self->_error ($!, 1); |
506 | $self->_error ($!, 1); |
443 | } |
507 | } |
444 | }; |
508 | }; |
445 | |
509 | |
446 | # try to write data immediately |
510 | # try to write data immediately |
447 | $cb->(); |
511 | $cb->() unless $self->{autocork}; |
448 | |
512 | |
449 | # if still data left in wbuf, we need to poll |
513 | # if still data left in wbuf, we need to poll |
450 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
514 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
451 | if length $self->{wbuf}; |
515 | if length $self->{wbuf}; |
452 | }; |
516 | }; |
… | |
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678 | |
742 | |
679 | if ( |
743 | if ( |
680 | defined $self->{rbuf_max} |
744 | defined $self->{rbuf_max} |
681 | && $self->{rbuf_max} < length $self->{rbuf} |
745 | && $self->{rbuf_max} < length $self->{rbuf} |
682 | ) { |
746 | ) { |
683 | return $self->_error (&Errno::ENOSPC, 1); |
747 | $self->_error (&Errno::ENOSPC, 1), return; |
684 | } |
748 | } |
685 | |
749 | |
686 | while () { |
750 | while () { |
687 | no strict 'refs'; |
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688 | |
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689 | my $len = length $self->{rbuf}; |
751 | my $len = length $self->{rbuf}; |
690 | |
752 | |
691 | if (my $cb = shift @{ $self->{_queue} }) { |
753 | if (my $cb = shift @{ $self->{_queue} }) { |
692 | unless ($cb->($self)) { |
754 | unless ($cb->($self)) { |
693 | if ($self->{_eof}) { |
755 | if ($self->{_eof}) { |
694 | # no progress can be made (not enough data and no data forthcoming) |
756 | # no progress can be made (not enough data and no data forthcoming) |
695 | $self->_error (&Errno::EPIPE, 1), last; |
757 | $self->_error (&Errno::EPIPE, 1), return; |
696 | } |
758 | } |
697 | |
759 | |
698 | unshift @{ $self->{_queue} }, $cb; |
760 | unshift @{ $self->{_queue} }, $cb; |
699 | last; |
761 | last; |
700 | } |
762 | } |
… | |
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708 | && !@{ $self->{_queue} } # and the queue is still empty |
770 | && !@{ $self->{_queue} } # and the queue is still empty |
709 | && $self->{on_read} # but we still have on_read |
771 | && $self->{on_read} # but we still have on_read |
710 | ) { |
772 | ) { |
711 | # no further data will arrive |
773 | # no further data will arrive |
712 | # so no progress can be made |
774 | # so no progress can be made |
713 | $self->_error (&Errno::EPIPE, 1), last |
775 | $self->_error (&Errno::EPIPE, 1), return |
714 | if $self->{_eof}; |
776 | if $self->{_eof}; |
715 | |
777 | |
716 | last; # more data might arrive |
778 | last; # more data might arrive |
717 | } |
779 | } |
718 | } else { |
780 | } else { |
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720 | delete $self->{_rw}; |
782 | delete $self->{_rw}; |
721 | last; |
783 | last; |
722 | } |
784 | } |
723 | } |
785 | } |
724 | |
786 | |
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787 | if ($self->{_eof}) { |
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788 | if ($self->{on_eof}) { |
725 | $self->{on_eof}($self) |
789 | $self->{on_eof}($self) |
726 | if $self->{_eof} && $self->{on_eof}; |
790 | } else { |
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791 | $self->_error (0, 1); |
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792 | } |
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793 | } |
727 | |
794 | |
728 | # may need to restart read watcher |
795 | # may need to restart read watcher |
729 | unless ($self->{_rw}) { |
796 | unless ($self->{_rw}) { |
730 | $self->start_read |
797 | $self->start_read |
731 | if $self->{on_read} || @{ $self->{_queue} }; |
798 | if $self->{on_read} || @{ $self->{_queue} }; |
… | |
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857 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
924 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
858 | 1 |
925 | 1 |
859 | } |
926 | } |
860 | }; |
927 | }; |
861 | |
928 | |
862 | # compatibility with older API |
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863 | sub push_read_chunk { |
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864 | $_[0]->push_read (chunk => $_[1], $_[2]); |
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|
865 | } |
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866 | |
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867 | sub unshift_read_chunk { |
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868 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
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869 | } |
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870 | |
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871 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
929 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
872 | |
930 | |
873 | The callback will be called only once a full line (including the end of |
931 | The callback will be called only once a full line (including the end of |
874 | line marker, C<$eol>) has been read. This line (excluding the end of line |
932 | line marker, C<$eol>) has been read. This line (excluding the end of line |
875 | marker) will be passed to the callback as second argument (C<$line>), and |
933 | marker) will be passed to the callback as second argument (C<$line>), and |
… | |
… | |
890 | =cut |
948 | =cut |
891 | |
949 | |
892 | register_read_type line => sub { |
950 | register_read_type line => sub { |
893 | my ($self, $cb, $eol) = @_; |
951 | my ($self, $cb, $eol) = @_; |
894 | |
952 | |
895 | $eol = qr|(\015?\012)| if @_ < 3; |
953 | if (@_ < 3) { |
|
|
954 | # this is more than twice as fast as the generic code below |
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|
955 | sub { |
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956 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
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957 | |
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958 | $cb->($_[0], $1, $2); |
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959 | 1 |
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|
960 | } |
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|
961 | } else { |
896 | $eol = quotemeta $eol unless ref $eol; |
962 | $eol = quotemeta $eol unless ref $eol; |
897 | $eol = qr|^(.*?)($eol)|s; |
963 | $eol = qr|^(.*?)($eol)|s; |
898 | |
964 | |
899 | sub { |
965 | sub { |
900 | $_[0]{rbuf} =~ s/$eol// or return; |
966 | $_[0]{rbuf} =~ s/$eol// or return; |
901 | |
967 | |
902 | $cb->($_[0], $1, $2); |
968 | $cb->($_[0], $1, $2); |
|
|
969 | 1 |
903 | 1 |
970 | } |
904 | } |
971 | } |
905 | }; |
972 | }; |
906 | |
|
|
907 | # compatibility with older API |
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|
908 | sub push_read_line { |
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|
909 | my $self = shift; |
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|
910 | $self->push_read (line => @_); |
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|
911 | } |
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912 | |
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|
913 | sub unshift_read_line { |
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|
914 | my $self = shift; |
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|
915 | $self->unshift_read (line => @_); |
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|
916 | } |
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|
917 | |
973 | |
918 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
974 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
919 | |
975 | |
920 | Makes a regex match against the regex object C<$accept> and returns |
976 | Makes a regex match against the regex object C<$accept> and returns |
921 | everything up to and including the match. |
977 | everything up to and including the match. |
… | |
… | |
1042 | register_read_type packstring => sub { |
1098 | register_read_type packstring => sub { |
1043 | my ($self, $cb, $format) = @_; |
1099 | my ($self, $cb, $format) = @_; |
1044 | |
1100 | |
1045 | sub { |
1101 | sub { |
1046 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1102 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1047 | defined (my $len = eval { unpack $format, $_[0]->{rbuf} }) |
1103 | defined (my $len = eval { unpack $format, $_[0]{rbuf} }) |
1048 | or return; |
1104 | or return; |
1049 | |
1105 | |
|
|
1106 | $format = length pack $format, $len; |
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|
1107 | |
|
|
1108 | # bypass unshift if we already have the remaining chunk |
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|
1109 | if ($format + $len <= length $_[0]{rbuf}) { |
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|
1110 | my $data = substr $_[0]{rbuf}, $format, $len; |
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|
1111 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
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|
1112 | $cb->($_[0], $data); |
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|
1113 | } else { |
1050 | # remove prefix |
1114 | # remove prefix |
1051 | substr $_[0]->{rbuf}, 0, (length pack $format, $len), ""; |
1115 | substr $_[0]{rbuf}, 0, $format, ""; |
1052 | |
1116 | |
1053 | # read rest |
1117 | # read remaining chunk |
1054 | $_[0]->unshift_read (chunk => $len, $cb); |
1118 | $_[0]->unshift_read (chunk => $len, $cb); |
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|
1119 | } |
1055 | |
1120 | |
1056 | 1 |
1121 | 1 |
1057 | } |
1122 | } |
1058 | }; |
1123 | }; |
1059 | |
1124 | |
… | |
… | |
1116 | |
1181 | |
1117 | require Storable; |
1182 | require Storable; |
1118 | |
1183 | |
1119 | sub { |
1184 | sub { |
1120 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1185 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1121 | defined (my $len = eval { unpack "w", $_[0]->{rbuf} }) |
1186 | defined (my $len = eval { unpack "w", $_[0]{rbuf} }) |
1122 | or return; |
1187 | or return; |
1123 | |
1188 | |
|
|
1189 | my $format = length pack "w", $len; |
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|
1190 | |
|
|
1191 | # bypass unshift if we already have the remaining chunk |
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|
1192 | if ($format + $len <= length $_[0]{rbuf}) { |
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|
1193 | my $data = substr $_[0]{rbuf}, $format, $len; |
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|
1194 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
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|
1195 | $cb->($_[0], Storable::thaw ($data)); |
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|
1196 | } else { |
1124 | # remove prefix |
1197 | # remove prefix |
1125 | substr $_[0]->{rbuf}, 0, (length pack "w", $len), ""; |
1198 | substr $_[0]{rbuf}, 0, $format, ""; |
1126 | |
1199 | |
1127 | # read rest |
1200 | # read remaining chunk |
1128 | $_[0]->unshift_read (chunk => $len, sub { |
1201 | $_[0]->unshift_read (chunk => $len, sub { |
1129 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1202 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1130 | $cb->($_[0], $ref); |
1203 | $cb->($_[0], $ref); |
1131 | } else { |
1204 | } else { |
1132 | $self->_error (&Errno::EBADMSG); |
1205 | $self->_error (&Errno::EBADMSG); |
|
|
1206 | } |
1133 | } |
1207 | }); |
1134 | }); |
1208 | } |
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|
1209 | |
|
|
1210 | 1 |
1135 | } |
1211 | } |
1136 | }; |
1212 | }; |
1137 | |
1213 | |
1138 | =back |
1214 | =back |
1139 | |
1215 | |
… | |
… | |
1400 | =over 4 |
1476 | =over 4 |
1401 | |
1477 | |
1402 | =item * all constructor arguments become object members. |
1478 | =item * all constructor arguments become object members. |
1403 | |
1479 | |
1404 | At least initially, when you pass a C<tls>-argument to the constructor it |
1480 | At least initially, when you pass a C<tls>-argument to the constructor it |
1405 | will end up in C<< $handle->{tls} >>. Those members might be changes or |
1481 | will end up in C<< $handle->{tls} >>. Those members might be changed or |
1406 | mutated later on (for example C<tls> will hold the TLS connection object). |
1482 | mutated later on (for example C<tls> will hold the TLS connection object). |
1407 | |
1483 | |
1408 | =item * other object member names are prefixed with an C<_>. |
1484 | =item * other object member names are prefixed with an C<_>. |
1409 | |
1485 | |
1410 | All object members not explicitly documented (internal use) are prefixed |
1486 | All object members not explicitly documented (internal use) are prefixed |