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# -*- encoding: utf-8; mode: cperl -*- |
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# $Id: BigBrother.pm yblusseau $ |
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package POE::Filter::BigBrother; |
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use strict; |
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use warnings; |
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use POE::Filter; |
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use vars qw($VERSION @ISA); |
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$VERSION = '0.13'; |
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@ISA = qw(POE::Filter); |
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sub DEBUG () { 0 } |
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sub BUFFER () { 0 } |
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sub COMBO_MSG () { 1 } |
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use constant { |
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LF => "\x0A", |
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CR => "\x0D", |
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}; |
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#------------------------------------------------------------------------------ |
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sub new { |
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my $type = shift; |
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my $self = bless [ |
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'', # BUFFER |
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0 , # COMBO_MSG |
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], $type; |
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$self; |
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} |
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#------------------------------------------------------------------------------ |
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# get() is inherited from POE::Filter. |
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#------------------------------------------------------------------------------ |
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# 2001-07-27 RCC: The get_one() variant of get() allows Wheel::Xyz to |
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# retrieve one filtered block at a time. This is necessary for filter |
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# changing and proper input flow control. |
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sub get_one_start { |
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my ($self, $stream) = @_; |
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$self->[BUFFER] .= join '', @$stream; |
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DEBUG and warn $self->[BUFFER]; |
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# Is it a combo message? |
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if (index($self->[BUFFER], "combo".CR) == 0 or |
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index($self->[BUFFER], "combo".LF) == 0) { |
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# suppress the "combo" keyword and the first new-line character |
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substr($self->[BUFFER], 0, 6, ""); |
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# suppress a potential second new-line character |
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my $first = substr($self->[BUFFER], 0, 1); |
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substr($self->[BUFFER], 0, 1, "") if $first eq CR or $first eq LF; |
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$self->[COMBO_MSG] = 1; # The message is a combo message |
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} |
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} |
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sub get_one { |
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my $self = shift; |
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return [] unless defined $self->[BUFFER] and length $self->[BUFFER]; |
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# Split the Combo message |
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if ($self->[COMBO_MSG] and $self->[BUFFER] =~ /(?:(?:\x0D\x0A?){2}|(?:\x0A\x0D?){2})status/) { |
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my ($msg, $rest) = split /(?:(?:\x0D\x0A?){2}|(?:\x0A\x0D?){2})status/, $self->[BUFFER], 2; |
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$self->[BUFFER] = "status$rest"; # Next message |
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return [ $msg ]; # First message |
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} |
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else { |
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my $block = $self->[BUFFER]; |
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$self->[BUFFER] = ''; # Clear the buffer |
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$block =~ s/\0+$//; # Remove NULL characters from the end |
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return [ $block ]; # Return the data |
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} |
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} |
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#------------------------------------------------------------------------------ |
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sub put { |
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my ($self, $chunks) = @_; |
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[ @$chunks ]; |
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} |
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#------------------------------------------------------------------------------ |
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sub get_pending { |
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my $self = shift; |
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return undef unless length $self->[BUFFER]; |
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[ $self->[BUFFER] ]; |
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} |
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1; # End of POE::Filter::BigBrother |
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__END__ |