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 = 4.22; |
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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49 | |
49 | |
50 | 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 |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
52 | on sockets see L<AnyEvent::Util>. |
52 | on sockets see L<AnyEvent::Util>. |
53 | |
53 | |
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54 | The L<AnyEvent::Intro> tutorial contains some well-documented |
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55 | AnyEvent::Handle examples. |
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56 | |
54 | In the following, when the documentation refers to of "bytes" then this |
57 | In the following, when the documentation refers to of "bytes" then this |
55 | means characters. As sysread and syswrite are used for all I/O, their |
58 | means characters. As sysread and syswrite are used for all I/O, their |
56 | treatment of characters applies to this module as well. |
59 | treatment of characters applies to this module as well. |
57 | |
60 | |
58 | All callbacks will be invoked with the handle object as their first |
61 | All callbacks will be invoked with the handle object as their first |
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70 | |
73 | |
71 | =item fh => $filehandle [MANDATORY] |
74 | =item fh => $filehandle [MANDATORY] |
72 | |
75 | |
73 | The filehandle this L<AnyEvent::Handle> object will operate on. |
76 | The filehandle this L<AnyEvent::Handle> object will operate on. |
74 | |
77 | |
75 | NOTE: The filehandle will be set to non-blocking (using |
78 | NOTE: The filehandle will be set to non-blocking mode (using |
76 | AnyEvent::Util::fh_nonblocking). |
79 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
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80 | that mode. |
77 | |
81 | |
78 | =item on_eof => $cb->($handle) |
82 | =item on_eof => $cb->($handle) |
79 | |
83 | |
80 | Set the callback to be called when an end-of-file condition is detected, |
84 | 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 |
85 | i.e. in the case of a socket, when the other side has closed the |
82 | connection cleanly. |
86 | connection cleanly. |
83 | |
87 | |
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88 | For sockets, this just means that the other side has stopped sending data, |
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89 | you can still try to write data, and, in fact, one can return from the eof |
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90 | callback and continue writing data, as only the read part has been shut |
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91 | down. |
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92 | |
84 | While not mandatory, it is highly recommended to set an eof callback, |
93 | 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 |
94 | otherwise you might end up with a closed socket while you are still |
86 | waiting for data. |
95 | waiting for data. |
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96 | |
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97 | If an EOF condition has been detected but no C<on_eof> callback has been |
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98 | set, then a fatal error will be raised with C<$!> set to <0>. |
87 | |
99 | |
88 | =item on_error => $cb->($handle, $fatal) |
100 | =item on_error => $cb->($handle, $fatal) |
89 | |
101 | |
90 | This is the error callback, which is called when, well, some error |
102 | This is the error callback, which is called when, well, some error |
91 | occured, such as not being able to resolve the hostname, failure to |
103 | occured, such as not being able to resolve the hostname, failure to |
92 | connect or a read error. |
104 | connect or a read error. |
93 | |
105 | |
94 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
106 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
95 | fatal errors the handle object will be shut down and will not be |
107 | fatal errors the handle object will be shut down and will not be usable |
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108 | (but you are free to look at the current C< ->rbuf >). Examples of fatal |
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109 | errors are an EOF condition with active (but unsatisifable) read watchers |
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110 | (C<EPIPE>) or I/O errors. |
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111 | |
96 | usable. Non-fatal errors can be retried by simply returning, but it is |
112 | Non-fatal errors can be retried by simply returning, but it is recommended |
97 | recommended to simply ignore this parameter and instead abondon the handle |
113 | to simply ignore this parameter and instead abondon the handle object |
98 | object when this callback is invoked. |
114 | when this callback is invoked. Examples of non-fatal errors are timeouts |
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115 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
99 | |
116 | |
100 | On callback entrance, the value of C<$!> contains the operating system |
117 | On callback entrance, the value of C<$!> contains the operating system |
101 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
118 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
102 | |
119 | |
103 | While not mandatory, it is I<highly> recommended to set this callback, as |
120 | While not mandatory, it is I<highly> recommended to set this callback, as |
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288 | delete $self->{_rw}; |
305 | delete $self->{_rw}; |
289 | delete $self->{_ww}; |
306 | delete $self->{_ww}; |
290 | delete $self->{fh}; |
307 | delete $self->{fh}; |
291 | |
308 | |
292 | $self->stoptls; |
309 | $self->stoptls; |
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310 | |
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311 | delete $self->{on_read}; |
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312 | delete $self->{_queue}; |
293 | } |
313 | } |
294 | |
314 | |
295 | sub _error { |
315 | sub _error { |
296 | my ($self, $errno, $fatal) = @_; |
316 | my ($self, $errno, $fatal) = @_; |
297 | |
317 | |
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726 | |
746 | |
727 | if ( |
747 | if ( |
728 | defined $self->{rbuf_max} |
748 | defined $self->{rbuf_max} |
729 | && $self->{rbuf_max} < length $self->{rbuf} |
749 | && $self->{rbuf_max} < length $self->{rbuf} |
730 | ) { |
750 | ) { |
731 | return $self->_error (&Errno::ENOSPC, 1); |
751 | $self->_error (&Errno::ENOSPC, 1), return; |
732 | } |
752 | } |
733 | |
753 | |
734 | while () { |
754 | while () { |
735 | no strict 'refs'; |
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736 | |
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737 | my $len = length $self->{rbuf}; |
755 | my $len = length $self->{rbuf}; |
738 | |
756 | |
739 | if (my $cb = shift @{ $self->{_queue} }) { |
757 | if (my $cb = shift @{ $self->{_queue} }) { |
740 | unless ($cb->($self)) { |
758 | unless ($cb->($self)) { |
741 | if ($self->{_eof}) { |
759 | if ($self->{_eof}) { |
742 | # no progress can be made (not enough data and no data forthcoming) |
760 | # no progress can be made (not enough data and no data forthcoming) |
743 | $self->_error (&Errno::EPIPE, 1), last; |
761 | $self->_error (&Errno::EPIPE, 1), return; |
744 | } |
762 | } |
745 | |
763 | |
746 | unshift @{ $self->{_queue} }, $cb; |
764 | unshift @{ $self->{_queue} }, $cb; |
747 | last; |
765 | last; |
748 | } |
766 | } |
… | |
… | |
756 | && !@{ $self->{_queue} } # and the queue is still empty |
774 | && !@{ $self->{_queue} } # and the queue is still empty |
757 | && $self->{on_read} # but we still have on_read |
775 | && $self->{on_read} # but we still have on_read |
758 | ) { |
776 | ) { |
759 | # no further data will arrive |
777 | # no further data will arrive |
760 | # so no progress can be made |
778 | # so no progress can be made |
761 | $self->_error (&Errno::EPIPE, 1), last |
779 | $self->_error (&Errno::EPIPE, 1), return |
762 | if $self->{_eof}; |
780 | if $self->{_eof}; |
763 | |
781 | |
764 | last; # more data might arrive |
782 | last; # more data might arrive |
765 | } |
783 | } |
766 | } else { |
784 | } else { |
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768 | delete $self->{_rw}; |
786 | delete $self->{_rw}; |
769 | last; |
787 | last; |
770 | } |
788 | } |
771 | } |
789 | } |
772 | |
790 | |
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791 | if ($self->{_eof}) { |
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792 | if ($self->{on_eof}) { |
773 | $self->{on_eof}($self) |
793 | $self->{on_eof}($self) |
774 | if $self->{_eof} && $self->{on_eof}; |
794 | } else { |
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795 | $self->_error (0, 1); |
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796 | } |
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797 | } |
775 | |
798 | |
776 | # may need to restart read watcher |
799 | # may need to restart read watcher |
777 | unless ($self->{_rw}) { |
800 | unless ($self->{_rw}) { |
778 | $self->start_read |
801 | $self->start_read |
779 | if $self->{on_read} || @{ $self->{_queue} }; |
802 | if $self->{on_read} || @{ $self->{_queue} }; |
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905 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
928 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
906 | 1 |
929 | 1 |
907 | } |
930 | } |
908 | }; |
931 | }; |
909 | |
932 | |
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, $eol) |
933 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
920 | |
934 | |
921 | The callback will be called only once a full line (including the end of |
935 | The callback will be called only once a full line (including the end of |
922 | line marker, C<$eol>) has been read. This line (excluding the end of line |
936 | 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 |
937 | marker) will be passed to the callback as second argument (C<$line>), and |
… | |
… | |
938 | =cut |
952 | =cut |
939 | |
953 | |
940 | register_read_type line => sub { |
954 | register_read_type line => sub { |
941 | my ($self, $cb, $eol) = @_; |
955 | my ($self, $cb, $eol) = @_; |
942 | |
956 | |
943 | $eol = qr|(\015?\012)| if @_ < 3; |
957 | if (@_ < 3) { |
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958 | # this is more than twice as fast as the generic code below |
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959 | sub { |
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960 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
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961 | |
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962 | $cb->($_[0], $1, $2); |
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963 | 1 |
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964 | } |
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965 | } else { |
944 | $eol = quotemeta $eol unless ref $eol; |
966 | $eol = quotemeta $eol unless ref $eol; |
945 | $eol = qr|^(.*?)($eol)|s; |
967 | $eol = qr|^(.*?)($eol)|s; |
946 | |
968 | |
947 | sub { |
969 | sub { |
948 | $_[0]{rbuf} =~ s/$eol// or return; |
970 | $_[0]{rbuf} =~ s/$eol// or return; |
949 | |
971 | |
950 | $cb->($_[0], $1, $2); |
972 | $cb->($_[0], $1, $2); |
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973 | 1 |
951 | 1 |
974 | } |
952 | } |
975 | } |
953 | }; |
976 | }; |
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 | |
977 | |
966 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
978 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
967 | |
979 | |
968 | Makes a regex match against the regex object C<$accept> and returns |
980 | Makes a regex match against the regex object C<$accept> and returns |
969 | everything up to and including the match. |
981 | everything up to and including the match. |
… | |
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1090 | register_read_type packstring => sub { |
1102 | register_read_type packstring => sub { |
1091 | my ($self, $cb, $format) = @_; |
1103 | my ($self, $cb, $format) = @_; |
1092 | |
1104 | |
1093 | sub { |
1105 | sub { |
1094 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1106 | # 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} }) |
1107 | defined (my $len = eval { unpack $format, $_[0]{rbuf} }) |
1096 | or return; |
1108 | or return; |
1097 | |
1109 | |
|
|
1110 | $format = length pack $format, $len; |
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|
1111 | |
|
|
1112 | # bypass unshift if we already have the remaining chunk |
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|
1113 | if ($format + $len <= length $_[0]{rbuf}) { |
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|
1114 | my $data = substr $_[0]{rbuf}, $format, $len; |
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|
1115 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
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|
1116 | $cb->($_[0], $data); |
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|
1117 | } else { |
1098 | # remove prefix |
1118 | # remove prefix |
1099 | substr $_[0]->{rbuf}, 0, (length pack $format, $len), ""; |
1119 | substr $_[0]{rbuf}, 0, $format, ""; |
1100 | |
1120 | |
1101 | # read rest |
1121 | # read remaining chunk |
1102 | $_[0]->unshift_read (chunk => $len, $cb); |
1122 | $_[0]->unshift_read (chunk => $len, $cb); |
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|
1123 | } |
1103 | |
1124 | |
1104 | 1 |
1125 | 1 |
1105 | } |
1126 | } |
1106 | }; |
1127 | }; |
1107 | |
1128 | |
… | |
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1164 | |
1185 | |
1165 | require Storable; |
1186 | require Storable; |
1166 | |
1187 | |
1167 | sub { |
1188 | sub { |
1168 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1189 | # 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} }) |
1190 | defined (my $len = eval { unpack "w", $_[0]{rbuf} }) |
1170 | or return; |
1191 | or return; |
1171 | |
1192 | |
|
|
1193 | my $format = length pack "w", $len; |
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|
1194 | |
|
|
1195 | # bypass unshift if we already have the remaining chunk |
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|
1196 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1197 | my $data = substr $_[0]{rbuf}, $format, $len; |
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|
1198 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
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|
1199 | $cb->($_[0], Storable::thaw ($data)); |
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|
1200 | } else { |
1172 | # remove prefix |
1201 | # remove prefix |
1173 | substr $_[0]->{rbuf}, 0, (length pack "w", $len), ""; |
1202 | substr $_[0]{rbuf}, 0, $format, ""; |
1174 | |
1203 | |
1175 | # read rest |
1204 | # read remaining chunk |
1176 | $_[0]->unshift_read (chunk => $len, sub { |
1205 | $_[0]->unshift_read (chunk => $len, sub { |
1177 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1206 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1178 | $cb->($_[0], $ref); |
1207 | $cb->($_[0], $ref); |
1179 | } else { |
1208 | } else { |
1180 | $self->_error (&Errno::EBADMSG); |
1209 | $self->_error (&Errno::EBADMSG); |
|
|
1210 | } |
1181 | } |
1211 | }); |
1182 | }); |
1212 | } |
|
|
1213 | |
|
|
1214 | 1 |
1183 | } |
1215 | } |
1184 | }; |
1216 | }; |
1185 | |
1217 | |
1186 | =back |
1218 | =back |
1187 | |
1219 | |