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 (); |
… | |
… | |
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 = 4.22; |
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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70 | |
70 | |
71 | =item fh => $filehandle [MANDATORY] |
71 | =item fh => $filehandle [MANDATORY] |
72 | |
72 | |
73 | The filehandle this L<AnyEvent::Handle> object will operate on. |
73 | The filehandle this L<AnyEvent::Handle> object will operate on. |
74 | |
74 | |
75 | NOTE: The filehandle will be set to non-blocking (using |
75 | NOTE: The filehandle will be set to non-blocking mode (using |
76 | AnyEvent::Util::fh_nonblocking). |
76 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
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77 | that mode. |
77 | |
78 | |
78 | =item on_eof => $cb->($handle) |
79 | =item on_eof => $cb->($handle) |
79 | |
80 | |
80 | Set the callback to be called when an end-of-file condition is detcted, |
81 | 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 |
82 | i.e. in the case of a socket, when the other side has closed the |
82 | connection cleanly. |
83 | connection cleanly. |
83 | |
84 | |
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85 | For sockets, this just means that the other side has stopped sending data, |
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86 | you can still try to write data, and, in fact, one can return from the eof |
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87 | callback and continue writing data, as only the read part has been shut |
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88 | down. |
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89 | |
84 | While not mandatory, it is highly recommended to set an eof callback, |
90 | 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 |
91 | otherwise you might end up with a closed socket while you are still |
86 | waiting for data. |
92 | waiting for data. |
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93 | |
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94 | If an EOF condition has been detected but no C<on_eof> callback has been |
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95 | set, then a fatal error will be raised with C<$!> set to <0>. |
87 | |
96 | |
88 | =item on_error => $cb->($handle, $fatal) |
97 | =item on_error => $cb->($handle, $fatal) |
89 | |
98 | |
90 | This is the error callback, which is called when, well, some error |
99 | This is the error callback, which is called when, well, some error |
91 | occured, such as not being able to resolve the hostname, failure to |
100 | occured, such as not being able to resolve the hostname, failure to |
92 | connect or a read error. |
101 | connect or a read error. |
93 | |
102 | |
94 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
103 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
95 | fatal errors the handle object will be shut down and will not be |
104 | fatal errors the handle object will be shut down and will not be usable |
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105 | (but you are free to look at the current C< ->rbuf >). Examples of fatal |
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106 | errors are an EOF condition with active (but unsatisifable) read watchers |
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107 | (C<EPIPE>) or I/O errors. |
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108 | |
96 | usable. Non-fatal errors can be retried by simply returning, but it is |
109 | Non-fatal errors can be retried by simply returning, but it is recommended |
97 | recommended to simply ignore this parameter and instead abondon the handle |
110 | to simply ignore this parameter and instead abondon the handle object |
98 | object when this callback is invoked. |
111 | when this callback is invoked. Examples of non-fatal errors are timeouts |
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112 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
99 | |
113 | |
100 | On callback entrance, the value of C<$!> contains the operating system |
114 | On callback entrance, the value of C<$!> contains the operating system |
101 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
115 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
102 | |
116 | |
103 | While not mandatory, it is I<highly> recommended to set this callback, as |
117 | While not mandatory, it is I<highly> recommended to set this callback, as |
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… | |
225 | You can also provide your own TLS connection object, but you have |
239 | You can also provide your own TLS connection object, but you have |
226 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
240 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
227 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
241 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
228 | AnyEvent::Handle. |
242 | AnyEvent::Handle. |
229 | |
243 | |
230 | See the C<starttls> method if you need to start TLs negotiation later. |
244 | See the C<starttls> method if you need to start TLS negotiation later. |
231 | |
245 | |
232 | =item tls_ctx => $ssl_ctx |
246 | =item tls_ctx => $ssl_ctx |
233 | |
247 | |
234 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
248 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
235 | (unless a connection object was specified directly). If this parameter is |
249 | (unless a connection object was specified directly). If this parameter is |
… | |
… | |
288 | delete $self->{_rw}; |
302 | delete $self->{_rw}; |
289 | delete $self->{_ww}; |
303 | delete $self->{_ww}; |
290 | delete $self->{fh}; |
304 | delete $self->{fh}; |
291 | |
305 | |
292 | $self->stoptls; |
306 | $self->stoptls; |
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307 | |
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308 | delete $self->{on_read}; |
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309 | delete $self->{_queue}; |
293 | } |
310 | } |
294 | |
311 | |
295 | sub _error { |
312 | sub _error { |
296 | my ($self, $errno, $fatal) = @_; |
313 | my ($self, $errno, $fatal) = @_; |
297 | |
314 | |
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726 | |
743 | |
727 | if ( |
744 | if ( |
728 | defined $self->{rbuf_max} |
745 | defined $self->{rbuf_max} |
729 | && $self->{rbuf_max} < length $self->{rbuf} |
746 | && $self->{rbuf_max} < length $self->{rbuf} |
730 | ) { |
747 | ) { |
731 | return $self->_error (&Errno::ENOSPC, 1); |
748 | $self->_error (&Errno::ENOSPC, 1), return; |
732 | } |
749 | } |
733 | |
750 | |
734 | while () { |
751 | while () { |
735 | no strict 'refs'; |
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736 | |
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737 | my $len = length $self->{rbuf}; |
752 | my $len = length $self->{rbuf}; |
738 | |
753 | |
739 | if (my $cb = shift @{ $self->{_queue} }) { |
754 | if (my $cb = shift @{ $self->{_queue} }) { |
740 | unless ($cb->($self)) { |
755 | unless ($cb->($self)) { |
741 | if ($self->{_eof}) { |
756 | if ($self->{_eof}) { |
742 | # no progress can be made (not enough data and no data forthcoming) |
757 | # no progress can be made (not enough data and no data forthcoming) |
743 | $self->_error (&Errno::EPIPE, 1), last; |
758 | $self->_error (&Errno::EPIPE, 1), return; |
744 | } |
759 | } |
745 | |
760 | |
746 | unshift @{ $self->{_queue} }, $cb; |
761 | unshift @{ $self->{_queue} }, $cb; |
747 | last; |
762 | last; |
748 | } |
763 | } |
… | |
… | |
756 | && !@{ $self->{_queue} } # and the queue is still empty |
771 | && !@{ $self->{_queue} } # and the queue is still empty |
757 | && $self->{on_read} # but we still have on_read |
772 | && $self->{on_read} # but we still have on_read |
758 | ) { |
773 | ) { |
759 | # no further data will arrive |
774 | # no further data will arrive |
760 | # so no progress can be made |
775 | # so no progress can be made |
761 | $self->_error (&Errno::EPIPE, 1), last |
776 | $self->_error (&Errno::EPIPE, 1), return |
762 | if $self->{_eof}; |
777 | if $self->{_eof}; |
763 | |
778 | |
764 | last; # more data might arrive |
779 | last; # more data might arrive |
765 | } |
780 | } |
766 | } else { |
781 | } else { |
… | |
… | |
768 | delete $self->{_rw}; |
783 | delete $self->{_rw}; |
769 | last; |
784 | last; |
770 | } |
785 | } |
771 | } |
786 | } |
772 | |
787 | |
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|
788 | if ($self->{_eof}) { |
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|
789 | if ($self->{on_eof}) { |
773 | $self->{on_eof}($self) |
790 | $self->{on_eof}($self) |
774 | if $self->{_eof} && $self->{on_eof}; |
791 | } else { |
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792 | $self->_error (0, 1); |
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793 | } |
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794 | } |
775 | |
795 | |
776 | # may need to restart read watcher |
796 | # may need to restart read watcher |
777 | unless ($self->{_rw}) { |
797 | unless ($self->{_rw}) { |
778 | $self->start_read |
798 | $self->start_read |
779 | if $self->{on_read} || @{ $self->{_queue} }; |
799 | if $self->{on_read} || @{ $self->{_queue} }; |
… | |
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905 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
925 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
906 | 1 |
926 | 1 |
907 | } |
927 | } |
908 | }; |
928 | }; |
909 | |
929 | |
910 | # compatibility with older API |
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911 | sub push_read_chunk { |
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912 | $_[0]->push_read (chunk => $_[1], $_[2]); |
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|
913 | } |
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914 | |
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915 | sub unshift_read_chunk { |
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916 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
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917 | } |
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918 | |
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919 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
930 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
920 | |
931 | |
921 | The callback will be called only once a full line (including the end of |
932 | The callback will be called only once a full line (including the end of |
922 | line marker, C<$eol>) has been read. This line (excluding the end of line |
933 | line marker, C<$eol>) has been read. This line (excluding the end of line |
923 | marker) will be passed to the callback as second argument (C<$line>), and |
934 | marker) will be passed to the callback as second argument (C<$line>), and |
… | |
… | |
938 | =cut |
949 | =cut |
939 | |
950 | |
940 | register_read_type line => sub { |
951 | register_read_type line => sub { |
941 | my ($self, $cb, $eol) = @_; |
952 | my ($self, $cb, $eol) = @_; |
942 | |
953 | |
943 | $eol = qr|(\015?\012)| if @_ < 3; |
954 | if (@_ < 3) { |
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955 | # this is more than twice as fast as the generic code below |
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956 | sub { |
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957 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
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958 | |
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959 | $cb->($_[0], $1, $2); |
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960 | 1 |
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961 | } |
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962 | } else { |
944 | $eol = quotemeta $eol unless ref $eol; |
963 | $eol = quotemeta $eol unless ref $eol; |
945 | $eol = qr|^(.*?)($eol)|s; |
964 | $eol = qr|^(.*?)($eol)|s; |
946 | |
965 | |
947 | sub { |
966 | sub { |
948 | $_[0]{rbuf} =~ s/$eol// or return; |
967 | $_[0]{rbuf} =~ s/$eol// or return; |
949 | |
968 | |
950 | $cb->($_[0], $1, $2); |
969 | $cb->($_[0], $1, $2); |
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970 | 1 |
951 | 1 |
971 | } |
952 | } |
972 | } |
953 | }; |
973 | }; |
954 | |
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955 | # compatibility with older API |
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956 | sub push_read_line { |
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957 | my $self = shift; |
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958 | $self->push_read (line => @_); |
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959 | } |
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960 | |
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961 | sub unshift_read_line { |
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962 | my $self = shift; |
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963 | $self->unshift_read (line => @_); |
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964 | } |
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965 | |
974 | |
966 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
975 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
967 | |
976 | |
968 | Makes a regex match against the regex object C<$accept> and returns |
977 | Makes a regex match against the regex object C<$accept> and returns |
969 | everything up to and including the match. |
978 | everything up to and including the match. |
… | |
… | |
1090 | register_read_type packstring => sub { |
1099 | register_read_type packstring => sub { |
1091 | my ($self, $cb, $format) = @_; |
1100 | my ($self, $cb, $format) = @_; |
1092 | |
1101 | |
1093 | sub { |
1102 | sub { |
1094 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1103 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1095 | defined (my $len = eval { unpack $format, $_[0]->{rbuf} }) |
1104 | defined (my $len = eval { unpack $format, $_[0]{rbuf} }) |
1096 | or return; |
1105 | or return; |
1097 | |
1106 | |
|
|
1107 | $format = length pack $format, $len; |
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|
1108 | |
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|
1109 | # bypass unshift if we already have the remaining chunk |
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|
1110 | if ($format + $len <= length $_[0]{rbuf}) { |
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|
1111 | my $data = substr $_[0]{rbuf}, $format, $len; |
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|
1112 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
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|
1113 | $cb->($_[0], $data); |
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|
1114 | } else { |
1098 | # remove prefix |
1115 | # remove prefix |
1099 | substr $_[0]->{rbuf}, 0, (length pack $format, $len), ""; |
1116 | substr $_[0]{rbuf}, 0, $format, ""; |
1100 | |
1117 | |
1101 | # read rest |
1118 | # read remaining chunk |
1102 | $_[0]->unshift_read (chunk => $len, $cb); |
1119 | $_[0]->unshift_read (chunk => $len, $cb); |
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|
1120 | } |
1103 | |
1121 | |
1104 | 1 |
1122 | 1 |
1105 | } |
1123 | } |
1106 | }; |
1124 | }; |
1107 | |
1125 | |
… | |
… | |
1164 | |
1182 | |
1165 | require Storable; |
1183 | require Storable; |
1166 | |
1184 | |
1167 | sub { |
1185 | sub { |
1168 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1186 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1169 | defined (my $len = eval { unpack "w", $_[0]->{rbuf} }) |
1187 | defined (my $len = eval { unpack "w", $_[0]{rbuf} }) |
1170 | or return; |
1188 | or return; |
1171 | |
1189 | |
|
|
1190 | my $format = length pack "w", $len; |
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|
1191 | |
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|
1192 | # bypass unshift if we already have the remaining chunk |
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|
1193 | if ($format + $len <= length $_[0]{rbuf}) { |
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|
1194 | my $data = substr $_[0]{rbuf}, $format, $len; |
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|
1195 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
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|
1196 | $cb->($_[0], Storable::thaw ($data)); |
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|
1197 | } else { |
1172 | # remove prefix |
1198 | # remove prefix |
1173 | substr $_[0]->{rbuf}, 0, (length pack "w", $len), ""; |
1199 | substr $_[0]{rbuf}, 0, $format, ""; |
1174 | |
1200 | |
1175 | # read rest |
1201 | # read remaining chunk |
1176 | $_[0]->unshift_read (chunk => $len, sub { |
1202 | $_[0]->unshift_read (chunk => $len, sub { |
1177 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1203 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1178 | $cb->($_[0], $ref); |
1204 | $cb->($_[0], $ref); |
1179 | } else { |
1205 | } else { |
1180 | $self->_error (&Errno::EBADMSG); |
1206 | $self->_error (&Errno::EBADMSG); |
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|
1207 | } |
1181 | } |
1208 | }); |
1182 | }); |
1209 | } |
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|
1210 | |
|
|
1211 | 1 |
1183 | } |
1212 | } |
1184 | }; |
1213 | }; |
1185 | |
1214 | |
1186 | =back |
1215 | =back |
1187 | |
1216 | |
… | |
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1448 | =over 4 |
1477 | =over 4 |
1449 | |
1478 | |
1450 | =item * all constructor arguments become object members. |
1479 | =item * all constructor arguments become object members. |
1451 | |
1480 | |
1452 | At least initially, when you pass a C<tls>-argument to the constructor it |
1481 | At least initially, when you pass a C<tls>-argument to the constructor it |
1453 | will end up in C<< $handle->{tls} >>. Those members might be changes or |
1482 | will end up in C<< $handle->{tls} >>. Those members might be changed or |
1454 | mutated later on (for example C<tls> will hold the TLS connection object). |
1483 | mutated later on (for example C<tls> will hold the TLS connection object). |
1455 | |
1484 | |
1456 | =item * other object member names are prefixed with an C<_>. |
1485 | =item * other object member names are prefixed with an C<_>. |
1457 | |
1486 | |
1458 | All object members not explicitly documented (internal use) are prefixed |
1487 | All object members not explicitly documented (internal use) are prefixed |