class WebSocket::Frame::Data

Public Class Methods

new(*args) click to toggle source
Calls superclass method
# File lib/websocket/frame/data.rb, line 6
def initialize(*args)
  super(*convert_args(args))
  @masking_key = nil
end

Public Instance Methods

<<(*args) click to toggle source
Calls superclass method
# File lib/websocket/frame/data.rb, line 11
def <<(*args)
  super(*convert_args(args))
end
convert_args(args) click to toggle source

Convert all arguments to ASCII-8BIT for easier traversing

# File lib/websocket/frame/data.rb, line 16
def convert_args(args)
  args.collect { |arg| arg.dup.force_encoding('ASCII-8BIT') }
end
getbytes(start_index, count) click to toggle source

Extract `count` bytes starting from `start_index` and unmask it if needed.

# File lib/websocket/frame/data.rb, line 32
def getbytes(start_index, count)
  data = self[start_index, count]
  data = mask(data.bytes.to_a, @masking_key).pack('C*') if @masking_key
  data
end
mask(payload, mask) click to toggle source

Mask whole payload using mask key

# File lib/websocket/frame/data.rb, line 39
def mask(payload, mask)
  return mask_native(payload, mask) if respond_to?(:mask_native)
  result = []
  payload.each_with_index do |byte, i|
    result[i] = byte ^ mask[i % 4]
  end
  result
end
set_mask() click to toggle source

Extract mask from 4 first bytes according to spec

# File lib/websocket/frame/data.rb, line 21
def set_mask
  raise WebSocket::Error::Frame::MaskTooShort if bytesize < 4
  @masking_key = self[0..3].bytes.to_a
end
unset_mask() click to toggle source

Remove mask flag - it will still be present in payload

# File lib/websocket/frame/data.rb, line 27
def unset_mask
  @masking_key = nil
end