class EventMachine::WebSocket::MaskedString

Public Instance Methods

getbyte(index) click to toggle source
Calls superclass method String#getbyte
# File lib/em-websocket/masking04.rb, line 18
def getbyte(index)
  if defined?(@masking_key) && @masking_key
    masked_char = super
    masked_char ? masked_char ^ @masking_key.getbyte(index % 4) : nil
  else
    super
  end
end
getbytes(start_index, count) click to toggle source
# File lib/em-websocket/masking04.rb, line 27
def getbytes(start_index, count)
  data = ''
  data.force_encoding('ASCII-8BIT') if data.respond_to?(:force_encoding)
  count.times do |i|
    data << getbyte(start_index + i)
  end
  data
end
read_mask() click to toggle source

Read a 4 bit XOR mask - further requested bytes will be unmasked

# File lib/em-websocket/masking04.rb, line 5
def read_mask
  if respond_to?(:encoding) && encoding.name != "ASCII-8BIT"
    raise "MaskedString only operates on BINARY strings"
  end
  raise "Too short" if bytesize < 4 # TODO - change
  @masking_key = String.new(self[0..3])
end
unset_mask() click to toggle source

Removes the mask, behaves like a normal string again

# File lib/em-websocket/masking04.rb, line 14
def unset_mask
  @masking_key = nil
end