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package AMF::Connection::InputStream; |
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use strict; |
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use Carp; |
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1118
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6
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our $storable_with_options; |
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1
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1
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eval "use Storable::AMF0 0.84"; |
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1
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if ($@) |
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{ |
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$storable_with_options = 0; |
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} |
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else |
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{ |
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$storable_with_options = 1; |
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} |
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1
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eval "use Storable::AMF3 0.84"; |
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1
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31
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if ($@) |
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{ |
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$storable_with_options = 0; |
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} |
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else |
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{ |
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$storable_with_options = 1; |
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} |
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sub new { |
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0
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0
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0
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my $proto = shift; |
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0
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0
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my $class = ref($proto) || $proto; |
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0
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my ($stream, $storable_amf_options) = @_; |
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0
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0
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croak "Input stream must be a valid string" |
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if(ref($stream)); |
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0
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my $self = { |
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'stream' => $stream, |
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'cursor' => 0 |
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}; |
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0
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0
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if (defined $storable_amf_options) |
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{ |
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0
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0
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if ($Storable::AMF::VERSION < 0.84) |
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{ |
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0
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croak "Storable::AMF 0.84 or newer needed to set stream options\n"; |
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} |
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0
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$self->{'options'} = Storable::AMF::parse_option ($storable_amf_options); |
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} |
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0
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return bless($self, $class); |
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}; |
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54
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sub readBuffer { |
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0
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0
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my ($class, $length) = @_; |
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0
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croak "Buffer underrun at position: ". $class->{'cursor'} . ". Trying to fetch ". $length . " bytes from buffer total length ".length($class->{'stream'}) |
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if($length + $class->{'cursor'} > length($class->{'stream'})); |
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0
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my $data = substr($class->{'stream'},$class->{'cursor'},$length); |
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0
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$class->{'cursor'}+=$length; |
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0
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return $data; |
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}; |
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66
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sub readByte { |
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0
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0
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my ($class) = @_; |
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return ord($class->readBuffer(1)); |
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}; |
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72
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sub readInt { |
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0
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my ($class) = @_; |
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75
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0
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my $block = $class->readBuffer(2); |
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0
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my @int = unpack("n",$block); |
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0
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return $int[0]; |
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}; |
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sub readDouble { |
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0
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0
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my ($class) = @_; |
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84
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0
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my $double = $class->readBuffer(8); |
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86
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0
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my @testEndian = unpack("C*",pack("S*",256)); |
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0
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my $bigEndian = !$testEndian[1]==1; |
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0
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0
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$double = reverse($double) |
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if($bigEndian); |
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0
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my @double = unpack("d",$double); |
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92
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0
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return $double[0]; |
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}; |
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95
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sub readLong { |
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my ($class) = @_; |
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98
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0
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my $block = $class->readBuffer(4); |
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0
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my @long = unpack("N",$block); |
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101
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0
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return $long[0]; |
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}; |
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104
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# deparse out the next avail AMF entity |
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# TODO - make sure ref counts are reset/preserved between calls in the scope of the same InputStream - study Storable::AMF API |
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sub readAMFData { |
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my ($class) = @_; |
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109
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0
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my $type = $class->readByte(); |
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111
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# Storable::AMF will take care of deparsing the right AMF format |
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0
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$class->{'cursor'}--; |
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114
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0
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local $@ = undef; |
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116
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0
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my ($obj, $len); |
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0
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my $encoding=0; |
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0
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0
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if($type == 0x11) { |
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0
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$encoding=3; |
120
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0
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$class->{'cursor'}++; |
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0
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0
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0
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if ($storable_with_options == 0 |
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|| not defined $class->{'options'}) |
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{ |
124
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0
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($obj, $len) = Storable::AMF3::deparse_amf( substr($class->{'stream'},$class->{'cursor'})); |
125
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} |
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else |
127
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{ |
128
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0
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($obj, $len) = Storable::AMF3::deparse_amf( substr($class->{'stream'},$class->{'cursor'}), $class->{'options'}); |
129
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} |
130
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} else { |
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# NOTE: Storable::AMF0 seems not needing extra readByte() before deparse |
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133
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0
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0
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0
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if ($storable_with_options == 0 |
134
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|| not defined $class->{'options'}) |
135
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{ |
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0
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($obj, $len) = Storable::AMF0::deparse_amf( substr($class->{'stream'},$class->{'cursor'})); |
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} |
138
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else |
139
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{ |
140
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0
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($obj, $len) = Storable::AMF0::deparse_amf( substr($class->{'stream'},$class->{'cursor'}), $class->{'options'}); |
141
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} |
142
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}; |
143
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144
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0
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0
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croak "Can not read AMF".$encoding." data starting from position ".$class->{'cursor'}." of input - reason: ".$@ ."\n" |
145
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if($@); |
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147
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0
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0
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if(defined $obj) { |
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0
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0
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$class->{'cursor'}+=$len |
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unless( $len + $class->{'cursor'} > length($class->{'stream'}) ); |
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}; |
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152
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0
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return $obj; |
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}; |
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155
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1; |
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__END__ |