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package Parse::IRC; |
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{ |
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$Parse::IRC::VERSION = '1.20'; |
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} |
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#ABSTRACT: A parser for the IRC protocol. |
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# We export some stuff |
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require Exporter; |
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@ISA = qw[Exporter]; |
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@EXPORT = qw[parse_irc]; |
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use strict; |
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use warnings; |
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use File::Basename qw[fileparse]; |
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my $g = { |
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space => qr/\x20+/o, |
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trailing_space => qr/\x20*/o, |
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}; |
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my $irc_regex = qr/^ |
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(?: |
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\x3a # : comes before hand |
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(\S+) # [prefix] |
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$g->{'space'} # Followed by a space |
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)? # but is optional. |
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( |
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\d{3}|[a-zA-Z]+ # [command] |
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) # required. |
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(?: |
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$g->{'space'} # Strip leading space off [middle]s |
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( # [middle]s |
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(?: |
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[^\x00\x0a\x0d\x20\x3a] |
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[^\x00\x0a\x0d\x20]* |
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) # Match on 1 of these, |
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(?: |
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$g->{'space'} |
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[^\x00\x0a\x0d\x20\x3a] |
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[^\x00\x0a\x0d\x20]* |
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)* # then match on 0-13 of these, |
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) |
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)? # otherwise dont match at all. |
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(?: |
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$g->{'space'}\x3a # Strip off leading spacecolon for [trailing] |
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([^\x00\x0a\x0d]*) # [trailing] |
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)? # [trailing] is not necessary. |
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$g->{'trailing_space'} |
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$/x; |
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# the magic cookie jar |
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my %dcc_types = ( |
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qr/^(?:CHAT|SEND)$/ => sub { |
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my ($nick, $type, $args) = @_; |
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my ($file, $addr, $port, $size); |
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return if !(($file, $addr, $port, $size) = $args =~ /^(".+"|[^ ]+) +(\d+) +(\d+)(?: +(\d+))?/); |
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59
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if ($file =~ s/^"//) { |
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$file =~ s/"$//; |
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$file =~ s/\\"/"/g; |
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} |
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$file = fileparse($file); |
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65
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return ( |
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$port, |
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{ |
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nick => $nick, |
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type => $type, |
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file => $file, |
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size => $size, |
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addr => $addr, |
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port => $port, |
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}, |
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$file, |
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$size, |
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$addr, |
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); |
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}, |
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qr/^(?:ACCEPT|RESUME)$/ => sub { |
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my ($nick, $type, $args) = @_; |
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my ($file, $port, $position); |
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return if !(($file, $port, $position) = $args =~ /^(".+"|[^ ]+) +(\d+) +(\d+)/); |
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85
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$file =~ s/^"|"$//g; |
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$file = fileparse($file); |
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return ( |
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$port, |
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{ |
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nick => $nick, |
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type => $type, |
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file => $file, |
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size => $position, |
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port => $port, |
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}, |
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$file, |
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$position, |
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); |
100
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}, |
101
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); |
102
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103
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sub parse_irc { |
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2
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50
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2
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1
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26
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my $string = shift || return; |
105
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2
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18
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return __PACKAGE__->new(@_)->parse($string); |
106
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} |
107
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108
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sub new { |
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7
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7
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1
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15803
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my $package = shift; |
110
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7
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23
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my %opts = @_; |
111
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7
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52
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$opts{lc $_} = delete $opts{$_} for keys %opts; |
112
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7
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41
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return bless \%opts, $package; |
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} |
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115
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sub parse { |
116
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8
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8
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1
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3641
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my $self = shift; |
117
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8
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50
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35
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my $raw_line = shift || return; |
118
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8
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46
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$raw_line =~ s/(\x0D\x0A?|\x0A\x0D?)$//; |
119
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8
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50
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145
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if ( my($prefix, $command, $middles, $trailing) = $raw_line =~ m/$irc_regex/ ) { |
120
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8
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27
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my $event = { raw_line => $raw_line }; |
121
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8
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50
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38
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$event->{'prefix'} = $prefix if $prefix; |
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8
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29
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$event->{'command'} = uc $command; |
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8
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50
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33
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145
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$event->{'params'} = [] if ( defined ( $middles ) || defined ( $trailing ) ); |
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8
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50
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25
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push @{$event->{'params'}}, (split /$g->{'space'}/, $middles) if defined ( $middles ); |
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82
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125
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8
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50
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push @{$event->{'params'}}, $trailing if defined( $trailing ); |
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22
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126
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8
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50
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66
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78
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if ( $self->{ctcp} and $event->{'command'} =~ /^(PRIVMSG|NOTICE)$/ and $event->{params}->[1] =~ tr/\001// ) { |
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66
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127
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2
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9
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return $self->_get_ctcp( $event ); |
128
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} |
129
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6
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50
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66
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39
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if ( $self->{public} and $event->{'command'} eq 'PRIVMSG' and $event->{'params'}->[0] =~ /^(\x23|\x26)/ ) { |
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66
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130
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1
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2
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$event->{'command'} = 'PUBLIC'; |
131
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} |
132
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6
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23
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return $event; |
133
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} |
134
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else { |
135
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0
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0
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0
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warn "Received line $raw_line that is not IRC protocol\n" if $self->{debug}; |
136
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} |
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0
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0
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return; |
138
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} |
139
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140
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sub _get_ctcp { |
141
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2
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2
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5
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my ($self, $line) = @_; |
142
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143
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# Is this a CTCP request or reply? |
144
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2
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50
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9
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my $ctcp_type = $line->{command} eq 'PRIVMSG' ? 'CTCP' : 'CTCPREPLY'; |
145
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146
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# CAPAP IDENTIFY-MSG is only applied to ACTIONs |
147
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2
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7
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my ($msg, $identified) = ($line->{params}->[1], undef); |
148
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2
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50
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33
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18
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($msg, $identified) = _split_idmsg($msg) if $self->{identifymsg} && $msg =~ /^.ACTION/; |
149
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150
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2
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4
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my $events; |
151
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2
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9
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my ($ctcp, $text) = _ctcp_dequote($msg); |
152
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153
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2
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50
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6
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if (!defined $ctcp) { |
154
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0
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0
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0
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warn "Received malformed CTCP message: $msg\n" if $self->{debug}; |
155
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0
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0
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return $events; |
156
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} |
157
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158
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2
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50
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16
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my $nick = defined $line->{prefix} ? (split /!/, $line->{prefix})[0] : undef; |
159
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160
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# We only process the first CTCP. The only people who send multiple ones |
161
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# are those who are trying to flood our outgoing queue anyway (e.g. by |
162
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# having us reply to 20 VERSION requests at a time). |
163
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2
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4
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my ($name, $args); |
164
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2
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7
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CTCP: for my $string ($ctcp->[0]) { |
165
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2
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50
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16
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if (!(($name, $args) = $string =~ /^(\w+)(?: +(.*))?/)) { |
166
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defined $nick |
167
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0
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0
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0
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? do { warn "Received malformed CTCP message from $nick: $string\n" if $self->{debug} } |
168
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0
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0
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0
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: do { warn "Trying to send malformed CTCP message: $string\n" if $self->{debug} } |
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0
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0
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0
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169
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; |
170
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0
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0
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last CTCP; |
171
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} |
172
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173
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2
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50
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623
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if (lc $name eq 'dcc') { |
174
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0
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0
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my ($dcc_type, $rest); |
175
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176
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0
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0
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0
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if (!(($dcc_type, $rest) = $args =~ /^(\w+) +(.+)/)) { |
177
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defined $nick |
178
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0
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0
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0
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? do { warn "Received malformed DCC request from $nick: $args\n" if $self->{debug} } |
179
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0
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0
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0
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: do { warn "Trying to send malformed DCC request: $args\n" if $self->{debug} } |
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0
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0
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0
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180
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; |
181
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0
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0
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last CTCP; |
182
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183
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} |
184
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0
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0
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$dcc_type = uc $dcc_type; |
185
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186
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0
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0
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my ($handler) = grep { $dcc_type =~ /$_/ } keys %dcc_types; |
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0
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0
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187
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0
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0
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0
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if (!$handler) { |
188
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0
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0
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0
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warn "Unhandled DCC $dcc_type request: $rest\n" if $self->{debug}; |
189
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0
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0
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last CTCP; |
190
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} |
191
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192
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0
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0
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my @dcc_args = $dcc_types{$handler}->($nick, $dcc_type, $rest); |
193
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0
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0
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0
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if (!@dcc_args) { |
194
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defined $nick |
195
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0
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0
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0
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? do { warn "Received malformed DCC $dcc_type request from $nick: $rest\n" if $self->{debug} } |
196
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0
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0
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0
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: do { warn "Trying to send malformed DCC $dcc_type request: $rest\n" if $self->{debug} } |
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0
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0
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0
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197
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; |
198
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0
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0
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last CTCP; |
199
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} |
200
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201
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$events = { |
202
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0
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0
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prefix => $line->{prefix}, |
203
|
|
|
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|
|
command => 'DCC_REQUEST', |
204
|
|
|
|
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|
|
params => [ |
205
|
|
|
|
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|
|
$dcc_type, |
206
|
|
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|
|
|
|
@dcc_args, |
207
|
|
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|
|
|
|
], |
208
|
|
|
|
|
|
|
raw_line => $line->{raw_line}, |
209
|
|
|
|
|
|
|
}; |
210
|
|
|
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|
|
|
} |
211
|
|
|
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|
|
|
else { |
212
|
2
|
50
|
|
|
|
31
|
$events = { |
|
|
50
|
|
|
|
|
|
213
|
|
|
|
|
|
|
command => $ctcp_type . '_' . uc $name, |
214
|
|
|
|
|
|
|
prefix => $line->{prefix}, |
215
|
|
|
|
|
|
|
params => [ |
216
|
|
|
|
|
|
|
$line->{params}->[0], |
217
|
|
|
|
|
|
|
(defined $args ? $args : ''), |
218
|
|
|
|
|
|
|
(defined $identified ? $identified : () ), |
219
|
|
|
|
|
|
|
], |
220
|
|
|
|
|
|
|
raw_line => $line->{raw_line}, |
221
|
|
|
|
|
|
|
}; |
222
|
|
|
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|
|
|
} |
223
|
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|
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|
|
|
} |
224
|
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|
|
225
|
|
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|
|
|
|
# XXX: I'm not quite sure what this is for, but on FreeNode it adds an |
226
|
|
|
|
|
|
|
# extra bogus event and displays a debug message, so I have disabled it. |
227
|
|
|
|
|
|
|
# FreeNode precedes PRIVMSG and CTCP ACTION messages with '+' or '-'. |
228
|
|
|
|
|
|
|
#if ($text && @$text) { |
229
|
|
|
|
|
|
|
# my $what; |
230
|
|
|
|
|
|
|
# ($what) = $line->{raw_line} =~ /^(:[^ ]+ +\w+ +[^ ]+ +)/ |
231
|
|
|
|
|
|
|
# or warn "What the heck? '".$line->{raw_line}."'\n" if $self->{debug}; |
232
|
|
|
|
|
|
|
# $text = (defined $what ? $what : '') . ':' . join '', @$text; |
233
|
|
|
|
|
|
|
# $text =~ s/\cP/^P/g; |
234
|
|
|
|
|
|
|
# warn "CTCP: $text\n" if $self->{debug}; |
235
|
|
|
|
|
|
|
# push @$events, @{ $self->{_ircd}->get([$text]) }; |
236
|
|
|
|
|
|
|
#} |
237
|
|
|
|
|
|
|
|
238
|
2
|
|
|
|
|
17
|
return $events; |
239
|
|
|
|
|
|
|
} |
240
|
|
|
|
|
|
|
|
241
|
|
|
|
|
|
|
sub _split_idmsg { |
242
|
0
|
|
|
0
|
|
0
|
my ($line) = @_; |
243
|
0
|
|
|
|
|
0
|
my ($identified, $msg) = split //, $line, 2; |
244
|
0
|
0
|
|
|
|
0
|
$identified = $identified eq '+' ? 1 : 0; |
245
|
0
|
|
|
|
|
0
|
return $msg, $identified; |
246
|
|
|
|
|
|
|
} |
247
|
|
|
|
|
|
|
|
248
|
|
|
|
|
|
|
# Splits a message into CTCP and text chunks. This is gross. Most of |
249
|
|
|
|
|
|
|
# this is also stolen from Net::IRC, but I (fimm) wrote that too, so it's |
250
|
|
|
|
|
|
|
# used with permission. ;-) |
251
|
|
|
|
|
|
|
sub _ctcp_dequote { |
252
|
2
|
|
|
2
|
|
5
|
my ($msg) = @_; |
253
|
2
|
|
|
|
|
4
|
my (@chunks, $ctcp, $text); |
254
|
|
|
|
|
|
|
|
255
|
|
|
|
|
|
|
# CHUNG! CHUNG! CHUNG! |
256
|
|
|
|
|
|
|
|
257
|
2
|
50
|
|
|
|
6
|
if (!defined $msg) { |
258
|
0
|
|
|
|
|
0
|
die 'Not enough arguments to Parse::IRC::_ctcp_dequote'; |
259
|
|
|
|
|
|
|
} |
260
|
|
|
|
|
|
|
|
261
|
|
|
|
|
|
|
# Strip out any low-level quoting in the text. |
262
|
2
|
|
|
|
|
8
|
$msg = _low_dequote( $msg ); |
263
|
|
|
|
|
|
|
|
264
|
|
|
|
|
|
|
# Filter misplaced \001s before processing... (Thanks, tchrist!) |
265
|
2
|
50
|
|
|
|
10
|
substr($msg, rindex($msg, "\001"), 1, '\\a') |
266
|
|
|
|
|
|
|
if ($msg =~ tr/\001//) % 2 != 0; |
267
|
|
|
|
|
|
|
|
268
|
2
|
50
|
|
|
|
7
|
return if $msg !~ tr/\001//; |
269
|
|
|
|
|
|
|
|
270
|
2
|
|
|
|
|
10
|
@chunks = split /\001/, $msg; |
271
|
2
|
50
|
|
|
|
8
|
shift @chunks if !length $chunks[0]; # FIXME: Is this safe? |
272
|
|
|
|
|
|
|
|
273
|
2
|
|
|
|
|
8
|
for (@chunks) { |
274
|
|
|
|
|
|
|
# Dequote unnecessarily quoted chars, and convert escaped \'s and ^A's. |
275
|
2
|
|
|
|
|
27
|
s/\\([^\\a])/$1/g; |
276
|
2
|
|
|
|
|
5
|
s/\\\\/\\/g; |
277
|
2
|
|
|
|
|
8
|
s/\\a/\001/g; |
278
|
|
|
|
|
|
|
} |
279
|
|
|
|
|
|
|
|
280
|
|
|
|
|
|
|
# If the line begins with a control-A, the first chunk is a CTCP |
281
|
|
|
|
|
|
|
# message. Otherwise, it starts with text and alternates with CTCP |
282
|
|
|
|
|
|
|
# messages. Really stupid protocol. |
283
|
2
|
50
|
|
|
|
12
|
if ($msg =~ /^\001/) { |
284
|
2
|
|
|
|
|
6
|
push @$ctcp, shift @chunks; |
285
|
|
|
|
|
|
|
} |
286
|
|
|
|
|
|
|
|
287
|
2
|
|
|
|
|
8
|
while (@chunks) { |
288
|
0
|
|
|
|
|
0
|
push @$text, shift @chunks; |
289
|
0
|
0
|
|
|
|
0
|
push @$ctcp, shift @chunks if @chunks; |
290
|
|
|
|
|
|
|
} |
291
|
|
|
|
|
|
|
|
292
|
2
|
|
|
|
|
7
|
return ($ctcp, $text); |
293
|
|
|
|
|
|
|
} |
294
|
|
|
|
|
|
|
|
295
|
|
|
|
|
|
|
# Quotes a string in a low-level, protocol-safe, utterly brain-dead |
296
|
|
|
|
|
|
|
# fashion. Returns the quoted string. |
297
|
|
|
|
|
|
|
sub _low_quote { |
298
|
0
|
|
|
0
|
|
0
|
my ($line) = @_; |
299
|
0
|
|
|
|
|
0
|
my %enquote = ("\012" => 'n', "\015" => 'r', "\0" => '0', "\cP" => "\cP"); |
300
|
|
|
|
|
|
|
|
301
|
0
|
0
|
|
|
|
0
|
if (!defined $line) { |
302
|
0
|
|
|
|
|
0
|
die 'Not enough arguments to Parse::IRC->_low_quote'; |
303
|
|
|
|
|
|
|
} |
304
|
|
|
|
|
|
|
|
305
|
0
|
0
|
|
|
|
0
|
if ($line =~ tr/[\012\015\0\cP]//) { # quote \n, \r, ^P, and \0. |
306
|
0
|
|
|
|
|
0
|
$line =~ s/([\012\015\0\cP])/\cP$enquote{$1}/g; |
307
|
|
|
|
|
|
|
} |
308
|
|
|
|
|
|
|
|
309
|
0
|
|
|
|
|
0
|
return $line; |
310
|
|
|
|
|
|
|
} |
311
|
|
|
|
|
|
|
|
312
|
|
|
|
|
|
|
# Does low-level dequoting on CTCP messages. I hate this protocol. |
313
|
|
|
|
|
|
|
# Yes, I copied this whole section out of Net::IRC. |
314
|
|
|
|
|
|
|
sub _low_dequote { |
315
|
2
|
|
|
2
|
|
4
|
my ($line) = @_; |
316
|
2
|
|
|
|
|
16
|
my %dequote = (n => "\012", r => "\015", 0 => "\0", "\cP" => "\cP"); |
317
|
|
|
|
|
|
|
|
318
|
2
|
50
|
|
|
|
8
|
if (!defined $line) { |
319
|
0
|
|
|
|
|
0
|
die 'Not enough arguments to Parse::IRC->_low_dequote'; |
320
|
|
|
|
|
|
|
} |
321
|
|
|
|
|
|
|
|
322
|
|
|
|
|
|
|
# dequote \n, \r, ^P, and \0. |
323
|
|
|
|
|
|
|
# Thanks to Abigail (abigail@foad.org) for this clever bit. |
324
|
2
|
50
|
|
|
|
8
|
if ($line =~ tr/\cP//) { |
325
|
0
|
|
|
|
|
0
|
$line =~ s/\cP([nr0\cP])/$dequote{$1}/g; |
326
|
|
|
|
|
|
|
} |
327
|
|
|
|
|
|
|
|
328
|
2
|
|
|
|
|
7
|
return $line; |
329
|
|
|
|
|
|
|
} |
330
|
|
|
|
|
|
|
|
331
|
|
|
|
|
|
|
q[Operation Blackbriar]; |
332
|
|
|
|
|
|
|
|
333
|
|
|
|
|
|
|
__END__ |