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stmt |
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cond |
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package Protocol::Redis; |
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use strict; |
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use warnings; |
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use 5.008_001; |
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our $VERSION = 1.0006; |
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require Carp; |
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sub new { |
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my $class = shift; |
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$class = ref $class if ref $class; |
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my $self = {@_}; |
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1
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5
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return unless $self->{api} == '1'; |
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bless $self, $class; |
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1
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5
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$self->on_message(delete $self->{on_message}); |
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1
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2
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$self->{_messages} = []; |
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1
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$self->{_state} = \&_state_new_message; |
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$self; |
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} |
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sub api { |
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my $self = shift; |
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1
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5
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$self->{api}; |
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} |
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35
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my %message_type_encoders = ( |
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'+' => \&_encode_string, |
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'-' => \&_encode_string, |
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':' => \&_encode_string, |
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'$' => \&_encode_bulk, |
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'*' => \&_encode_multi_bulk, |
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); |
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sub encode { |
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1
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my ($self, $message) = @_; |
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if (my $encoder = $message_type_encoders{$message->{type}}) { |
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$encoder->($self, $message); |
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} |
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else { |
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0
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0
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Carp::croak(qq/Unknown message type $message->{type}/); |
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} |
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} |
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54
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sub _encode_string { |
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3
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my ($self, $message) = @_; |
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57
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3
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$message->{type} . $message->{data} . "\r\n"; |
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} |
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60
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sub _encode_bulk { |
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my ($self, $message) = @_; |
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63
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my $data = $message->{data}; |
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65
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8
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100
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return '$-1' . "\r\n" |
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unless defined $data; |
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68
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6
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'$' . length($data) . "\r\n" . $data . "\r\n"; |
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} |
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71
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sub _encode_multi_bulk { |
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5
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5
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my ($self, $message) = @_; |
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74
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5
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8
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my $data = $message->{data}; |
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76
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5
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100
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15
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return '*-1' . "\r\n" |
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unless defined $data; |
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79
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4
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my $e_message = '*' . scalar(@$data) . "\r\n"; |
80
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4
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8
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foreach my $element (@$data) { |
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6
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14
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$e_message .= $self->encode($element); |
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} |
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84
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4
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18
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$e_message; |
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} |
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87
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88
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sub get_message { |
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26
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26
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1
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39
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shift @{$_[0]->{_messages}}; |
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26
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170
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90
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} |
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92
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sub on_message { |
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4
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4
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1
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10
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my ($self, $cb) = @_; |
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4
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9
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$self->{_on_message_cb} = $cb; |
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} |
96
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97
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sub parse { |
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30
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30
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1
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61
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my ($self, $chunk) = @_; |
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100
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# Pass chunk to current vertex. |
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# Some vertices can return unparsed chunk. In this case |
102
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# cycle will pass chunk to next vertex. |
103
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30
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66
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1 while $chunk = $self->{_state}->($self, $chunk); |
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} |
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106
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sub _message_parsed { |
107
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29
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my ($self, $chunk) = @_; |
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109
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29
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44
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my $message = delete $self->{_cmd}; |
110
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111
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29
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100
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58
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if (my $cb = $self->{_on_message_cb}) { |
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4
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10
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$cb->($self, $message); |
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} |
114
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else { |
115
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25
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35
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push @{$self->{_messages}}, $message; |
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25
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45
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116
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} |
117
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118
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29
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50
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$self->{_state} = \&_state_new_message; |
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29
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111
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$chunk; |
120
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} |
121
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122
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my %message_type_parsers = ( |
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'+' => \&_state_string_message, |
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'-' => \&_state_string_message, |
125
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':' => \&_state_string_message, |
126
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'$' => \&_state_bulk_message, |
127
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'*' => \&_state_multibulk_message, |
128
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); |
129
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130
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sub _state_parse_message_type { |
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39
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39
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66
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my ($self, $chunk) = @_; |
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133
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39
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88
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my $cmd = substr $chunk, 0, 1, ''; |
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135
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39
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50
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96
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if ($cmd) { |
136
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39
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50
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88
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if (my $parser = $message_type_parsers{$cmd}) { |
137
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39
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64
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$self->{_cmd}{type} = $cmd; |
138
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39
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57
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$self->{_state} = $parser; |
139
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39
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130
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return $chunk; |
140
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} |
141
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142
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0
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0
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Carp::croak(qq/Unexpected input "$cmd"/); |
143
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} |
144
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} |
145
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146
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sub _state_new_message { |
147
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29
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29
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48
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my ($self, $chunk) = @_; |
148
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149
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29
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68
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$self->{_cmd} = {type => undef, data => undef}; |
150
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151
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29
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55
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$self->{_state_cb} = \&_message_parsed; |
152
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153
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29
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51
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$self->{_state} = \&_state_parse_message_type; |
154
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29
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96
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$chunk; |
155
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} |
156
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157
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sub _state_string_message { |
158
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44
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44
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71
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my ($self, $chunk) = @_; |
159
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160
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44
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90
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my $str = $self->{_state_string} .= $chunk; |
161
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44
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74
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my $i = index $str, "\r\n"; |
162
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163
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# string isn't full |
164
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44
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100
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99
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return if $i < 0; |
165
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166
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# We got full string |
167
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39
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77
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$self->{_cmd}{data} = substr $str, 0, $i, ''; |
168
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169
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# Delete newline |
170
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39
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54
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substr $str, 0, 2, ''; |
171
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172
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39
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69
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delete $self->{_state_string}; |
173
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174
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39
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76
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$self->{_state_cb}->($self, $str); |
175
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} |
176
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177
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sub _state_bulk_message { |
178
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19
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19
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37
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my ($self, $chunk) = @_; |
179
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180
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19
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21
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my $bulk_state_cb = $self->{_state_cb}; |
181
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182
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# Read bulk message size |
183
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$self->{_state_cb} = sub { |
184
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19
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19
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35
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my ($self, $chunk) = @_; |
185
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186
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19
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30
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$self->{_bulk_size} = delete $self->{_cmd}{data}; |
187
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188
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19
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100
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51
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if ($self->{_bulk_size} == -1) { |
189
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190
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# Nil |
191
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1
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3
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$self->{_cmd}{data} = undef; |
192
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1
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3
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$bulk_state_cb->($self, $chunk); |
193
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} |
194
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else { |
195
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18
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28
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$self->{_state_cb} = $bulk_state_cb; |
196
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18
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29
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$self->{_state} = \&_state_bulk_message_data; |
197
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18
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89
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$chunk; |
198
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} |
199
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19
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62
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}; |
200
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19
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37
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$self->{_state} = \&_state_string_message; |
201
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19
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53
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$chunk; |
202
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} |
203
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204
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sub _state_bulk_message_data { |
205
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19
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19
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33
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my ($self, $chunk) = @_; |
206
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207
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19
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37
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my $str = $self->{_state_string} .= $chunk; |
208
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209
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# String + newline parsed |
210
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19
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100
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50
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return unless length $str >= $self->{_bulk_size} + 2; |
211
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212
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18
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37
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$self->{_cmd}{data} = substr $str, 0, $self->{_bulk_size}, ''; |
213
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214
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# Delete ending newline |
215
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18
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27
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substr $str, 0, 2, ''; |
216
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217
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18
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28
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delete $self->{_state_string}; |
218
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18
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36
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delete $self->{_bulk_size}; |
219
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220
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18
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37
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$self->{_state_cb}->($self, $str); |
221
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} |
222
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223
|
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|
|
sub _state_multibulk_message { |
224
|
8
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|
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8
|
|
14
|
my ($self, $chunk) = @_; |
225
|
|
|
|
|
|
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|
226
|
8
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|
|
|
|
16
|
my $mbulk_state_cb = delete $self->{_state_cb}; |
227
|
8
|
|
|
|
|
13
|
my $data = []; |
228
|
8
|
|
|
|
|
13
|
my $mbulk_process; |
229
|
|
|
|
|
|
|
|
230
|
|
|
|
|
|
|
my $arguments_num; |
231
|
|
|
|
|
|
|
|
232
|
|
|
|
|
|
|
$mbulk_process = sub { |
233
|
10
|
|
|
10
|
|
17
|
my ($self, $chunk) = @_; |
234
|
|
|
|
|
|
|
|
235
|
|
|
|
|
|
|
push @$data, |
236
|
|
|
|
|
|
|
{ type => delete $self->{_cmd}{type}, |
237
|
|
|
|
|
|
|
data => delete $self->{_cmd}{data} |
238
|
10
|
|
|
|
|
28
|
}; |
239
|
|
|
|
|
|
|
|
240
|
10
|
100
|
|
|
|
24
|
if (scalar @$data == $arguments_num) { |
241
|
|
|
|
|
|
|
|
242
|
|
|
|
|
|
|
# Cleanup |
243
|
6
|
|
|
|
|
8
|
$mbulk_process = undef; |
244
|
6
|
|
|
|
|
10
|
delete $self->{_state_cb}; |
245
|
|
|
|
|
|
|
|
246
|
|
|
|
|
|
|
# Return message |
247
|
6
|
|
|
|
|
8
|
$self->{_cmd}{type} = '*'; |
248
|
6
|
|
|
|
|
12
|
$self->{_cmd}{data} = $data; |
249
|
6
|
|
|
|
|
11
|
$mbulk_state_cb->($self, $chunk); |
250
|
|
|
|
|
|
|
} |
251
|
|
|
|
|
|
|
else { |
252
|
|
|
|
|
|
|
|
253
|
|
|
|
|
|
|
# read next string |
254
|
4
|
|
|
|
|
6
|
$self->{_state_cb} = $mbulk_process; |
255
|
4
|
|
|
|
|
7
|
$self->{_state} = \&_state_parse_message_type; |
256
|
4
|
|
|
|
|
15
|
$chunk; |
257
|
|
|
|
|
|
|
} |
258
|
8
|
|
|
|
|
28
|
}; |
259
|
|
|
|
|
|
|
|
260
|
|
|
|
|
|
|
$self->{_state_cb} = sub { |
261
|
8
|
|
|
8
|
|
33
|
my ($self, $chunk) = @_; |
262
|
|
|
|
|
|
|
|
263
|
|
|
|
|
|
|
# Number of Multi-Bulk message |
264
|
8
|
|
|
|
|
13
|
$arguments_num = delete $self->{_cmd}{data}; |
265
|
8
|
100
|
|
|
|
34
|
if ($arguments_num < 1) { |
266
|
2
|
|
|
|
|
4
|
$mbulk_process = undef; |
267
|
2
|
100
|
|
|
|
10
|
$self->{_cmd}{data} = $arguments_num == 0 ? [] : undef; |
268
|
2
|
|
|
|
|
9
|
$mbulk_state_cb->($self, $chunk); |
269
|
|
|
|
|
|
|
} |
270
|
|
|
|
|
|
|
else { |
271
|
|
|
|
|
|
|
|
272
|
|
|
|
|
|
|
# We got messages |
273
|
6
|
|
|
|
|
11
|
$self->{_state_cb} = $mbulk_process; |
274
|
6
|
|
|
|
|
12
|
$self->{_state} = \&_state_parse_message_type; |
275
|
6
|
|
|
|
|
34
|
$chunk; |
276
|
|
|
|
|
|
|
} |
277
|
8
|
|
|
|
|
20
|
}; |
278
|
|
|
|
|
|
|
|
279
|
|
|
|
|
|
|
# Get number of messages |
280
|
8
|
|
|
|
|
14
|
$self->{_state} = \&_state_string_message; |
281
|
8
|
|
|
|
|
27
|
$chunk; |
282
|
|
|
|
|
|
|
} |
283
|
|
|
|
|
|
|
|
284
|
|
|
|
|
|
|
1; |
285
|
|
|
|
|
|
|
__END__ |