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 = 4.22; |
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 | |
84 | While not mandatory, it is highly recommended to set an eof callback, |
84 | While not mandatory, it is highly recommended to set an eof callback, |
85 | otherwise you might end up with a closed socket while you are still |
85 | otherwise you might end up with a closed socket while you are still |
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162 | be configured to accept only so-and-so much data that it cannot act on |
162 | 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 |
163 | (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 |
164 | amount of data without a callback ever being called as long as the line |
165 | isn't finished). |
165 | isn't finished). |
166 | |
166 | |
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167 | =item autocork => <boolean> |
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168 | |
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169 | When disabled (the default), then C<push_write> will try to immediately |
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170 | write the data to the handle if possible. This avoids having to register |
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171 | a write watcher and wait for the next event loop iteration, but can be |
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172 | inefficient if you write multiple small chunks (this disadvantage is |
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173 | usually avoided by your kernel's nagle algorithm, see C<low_delay>). |
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174 | |
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175 | When enabled, then writes will always be queued till the next event loop |
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176 | iteration. This is efficient when you do many small writes per iteration, |
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177 | but less efficient when you do a single write only. |
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178 | |
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179 | =item no_delay => <boolean> |
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180 | |
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181 | When doing small writes on sockets, your operating system kernel might |
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182 | wait a bit for more data before actually sending it out. This is called |
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183 | the Nagle algorithm, and usually it is beneficial. |
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184 | |
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185 | In some situations you want as low a delay as possible, which cna be |
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186 | accomplishd by setting this option to true. |
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187 | |
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188 | The default is your opertaing system's default behaviour, this option |
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189 | explicitly enables or disables it, if possible. |
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190 | |
167 | =item read_size => <bytes> |
191 | =item read_size => <bytes> |
168 | |
192 | |
169 | The default read block size (the amount of bytes this module will try to read |
193 | The default read block size (the amount of bytes this module will try to read |
170 | during each (loop iteration). Default: C<8192>. |
194 | during each (loop iteration). Default: C<8192>. |
171 | |
195 | |
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201 | You can also provide your own TLS connection object, but you have |
225 | 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> |
226 | 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 |
227 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
204 | AnyEvent::Handle. |
228 | AnyEvent::Handle. |
205 | |
229 | |
206 | See the C<starttls> method if you need to start TLs negotiation later. |
230 | See the C<starttls> method if you need to start TLS negotiation later. |
207 | |
231 | |
208 | =item tls_ctx => $ssl_ctx |
232 | =item tls_ctx => $ssl_ctx |
209 | |
233 | |
210 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
234 | 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 |
235 | (unless a connection object was specified directly). If this parameter is |
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246 | } |
270 | } |
247 | |
271 | |
248 | $self->{_activity} = AnyEvent->now; |
272 | $self->{_activity} = AnyEvent->now; |
249 | $self->_timeout; |
273 | $self->_timeout; |
250 | |
274 | |
251 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
275 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
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276 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
252 | |
277 | |
253 | $self->start_read |
278 | $self->start_read |
254 | if $self->{on_read}; |
279 | if $self->{on_read}; |
255 | |
280 | |
256 | $self |
281 | $self |
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318 | |
343 | |
319 | =cut |
344 | =cut |
320 | |
345 | |
321 | sub on_timeout { |
346 | sub on_timeout { |
322 | $_[0]{on_timeout} = $_[1]; |
347 | $_[0]{on_timeout} = $_[1]; |
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348 | } |
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349 | |
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350 | =item $handle->autocork ($boolean) |
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351 | |
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352 | Enables or disables the current autocork behaviour (see C<autocork> |
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353 | constructor argument). |
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354 | |
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355 | =cut |
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356 | |
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357 | =item $handle->no_delay ($boolean) |
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358 | |
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359 | Enables or disables the C<no_delay> setting (see constructor argument of |
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360 | the same name for details). |
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361 | |
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362 | =cut |
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363 | |
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364 | sub no_delay { |
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365 | $_[0]{no_delay} = $_[1]; |
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366 | |
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367 | eval { |
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368 | local $SIG{__DIE__}; |
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369 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]; |
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370 | }; |
323 | } |
371 | } |
324 | |
372 | |
325 | ############################################################################# |
373 | ############################################################################# |
326 | |
374 | |
327 | =item $handle->timeout ($seconds) |
375 | =item $handle->timeout ($seconds) |
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442 | $self->_error ($!, 1); |
490 | $self->_error ($!, 1); |
443 | } |
491 | } |
444 | }; |
492 | }; |
445 | |
493 | |
446 | # try to write data immediately |
494 | # try to write data immediately |
447 | $cb->(); |
495 | $cb->() unless $self->{autocork}; |
448 | |
496 | |
449 | # if still data left in wbuf, we need to poll |
497 | # if still data left in wbuf, we need to poll |
450 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
498 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
451 | if length $self->{wbuf}; |
499 | if length $self->{wbuf}; |
452 | }; |
500 | }; |
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682 | ) { |
730 | ) { |
683 | return $self->_error (&Errno::ENOSPC, 1); |
731 | return $self->_error (&Errno::ENOSPC, 1); |
684 | } |
732 | } |
685 | |
733 | |
686 | while () { |
734 | while () { |
687 | no strict 'refs'; |
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688 | |
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689 | my $len = length $self->{rbuf}; |
735 | my $len = length $self->{rbuf}; |
690 | |
736 | |
691 | if (my $cb = shift @{ $self->{_queue} }) { |
737 | if (my $cb = shift @{ $self->{_queue} }) { |
692 | unless ($cb->($self)) { |
738 | unless ($cb->($self)) { |
693 | if ($self->{_eof}) { |
739 | if ($self->{_eof}) { |
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857 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
903 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
858 | 1 |
904 | 1 |
859 | } |
905 | } |
860 | }; |
906 | }; |
861 | |
907 | |
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, $eol) |
908 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
872 | |
909 | |
873 | The callback will be called only once a full line (including the end of |
910 | The callback will be called only once a full line (including the end of |
874 | line marker, C<$eol>) has been read. This line (excluding the end of line |
911 | 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 |
912 | marker) will be passed to the callback as second argument (C<$line>), and |
… | |
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890 | =cut |
927 | =cut |
891 | |
928 | |
892 | register_read_type line => sub { |
929 | register_read_type line => sub { |
893 | my ($self, $cb, $eol) = @_; |
930 | my ($self, $cb, $eol) = @_; |
894 | |
931 | |
895 | $eol = qr|(\015?\012)| if @_ < 3; |
932 | if (@_ < 3) { |
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933 | # this is more than twice as fast as the generic code below |
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934 | sub { |
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935 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
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936 | |
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937 | $cb->($_[0], $1, $2); |
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938 | 1 |
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939 | } |
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940 | } else { |
896 | $eol = quotemeta $eol unless ref $eol; |
941 | $eol = quotemeta $eol unless ref $eol; |
897 | $eol = qr|^(.*?)($eol)|s; |
942 | $eol = qr|^(.*?)($eol)|s; |
898 | |
943 | |
899 | sub { |
944 | sub { |
900 | $_[0]{rbuf} =~ s/$eol// or return; |
945 | $_[0]{rbuf} =~ s/$eol// or return; |
901 | |
946 | |
902 | $cb->($_[0], $1, $2); |
947 | $cb->($_[0], $1, $2); |
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948 | 1 |
903 | 1 |
949 | } |
904 | } |
950 | } |
905 | }; |
951 | }; |
906 | |
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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 | |
952 | |
918 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
953 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
919 | |
954 | |
920 | Makes a regex match against the regex object C<$accept> and returns |
955 | Makes a regex match against the regex object C<$accept> and returns |
921 | everything up to and including the match. |
956 | everything up to and including the match. |
… | |
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1042 | register_read_type packstring => sub { |
1077 | register_read_type packstring => sub { |
1043 | my ($self, $cb, $format) = @_; |
1078 | my ($self, $cb, $format) = @_; |
1044 | |
1079 | |
1045 | sub { |
1080 | sub { |
1046 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1081 | # 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} }) |
1082 | defined (my $len = eval { unpack $format, $_[0]{rbuf} }) |
1048 | or return; |
1083 | or return; |
1049 | |
1084 | |
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1085 | $format = length pack $format, $len; |
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1086 | |
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1087 | # bypass unshift if we already have the remaining chunk |
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1088 | if ($format + $len <= length $_[0]{rbuf}) { |
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1089 | my $data = substr $_[0]{rbuf}, $format, $len; |
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1090 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
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1091 | $cb->($_[0], $data); |
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1092 | } else { |
1050 | # remove prefix |
1093 | # remove prefix |
1051 | substr $_[0]->{rbuf}, 0, (length pack $format, $len), ""; |
1094 | substr $_[0]{rbuf}, 0, $format, ""; |
1052 | |
1095 | |
1053 | # read rest |
1096 | # read remaining chunk |
1054 | $_[0]->unshift_read (chunk => $len, $cb); |
1097 | $_[0]->unshift_read (chunk => $len, $cb); |
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1098 | } |
1055 | |
1099 | |
1056 | 1 |
1100 | 1 |
1057 | } |
1101 | } |
1058 | }; |
1102 | }; |
1059 | |
1103 | |
… | |
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1116 | |
1160 | |
1117 | require Storable; |
1161 | require Storable; |
1118 | |
1162 | |
1119 | sub { |
1163 | sub { |
1120 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1164 | # 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} }) |
1165 | defined (my $len = eval { unpack "w", $_[0]{rbuf} }) |
1122 | or return; |
1166 | or return; |
1123 | |
1167 | |
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1168 | my $format = length pack "w", $len; |
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1169 | |
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1170 | # bypass unshift if we already have the remaining chunk |
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1171 | if ($format + $len <= length $_[0]{rbuf}) { |
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1172 | my $data = substr $_[0]{rbuf}, $format, $len; |
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1173 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
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1174 | $cb->($_[0], Storable::thaw ($data)); |
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|
1175 | } else { |
1124 | # remove prefix |
1176 | # remove prefix |
1125 | substr $_[0]->{rbuf}, 0, (length pack "w", $len), ""; |
1177 | substr $_[0]{rbuf}, 0, $format, ""; |
1126 | |
1178 | |
1127 | # read rest |
1179 | # read remaining chunk |
1128 | $_[0]->unshift_read (chunk => $len, sub { |
1180 | $_[0]->unshift_read (chunk => $len, sub { |
1129 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1181 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1130 | $cb->($_[0], $ref); |
1182 | $cb->($_[0], $ref); |
1131 | } else { |
1183 | } else { |
1132 | $self->_error (&Errno::EBADMSG); |
1184 | $self->_error (&Errno::EBADMSG); |
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|
1185 | } |
1133 | } |
1186 | }); |
1134 | }); |
1187 | } |
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|
1188 | |
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|
1189 | 1 |
1135 | } |
1190 | } |
1136 | }; |
1191 | }; |
1137 | |
1192 | |
1138 | =back |
1193 | =back |
1139 | |
1194 | |
… | |
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1400 | =over 4 |
1455 | =over 4 |
1401 | |
1456 | |
1402 | =item * all constructor arguments become object members. |
1457 | =item * all constructor arguments become object members. |
1403 | |
1458 | |
1404 | At least initially, when you pass a C<tls>-argument to the constructor it |
1459 | 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 |
1460 | 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). |
1461 | mutated later on (for example C<tls> will hold the TLS connection object). |
1407 | |
1462 | |
1408 | =item * other object member names are prefixed with an C<_>. |
1463 | =item * other object member names are prefixed with an C<_>. |
1409 | |
1464 | |
1410 | All object members not explicitly documented (internal use) are prefixed |
1465 | All object members not explicitly documented (internal use) are prefixed |