class WebSocket::Frame::Data
Public Class Methods
new(*args)
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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)
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Calls superclass method
# File lib/websocket/frame/data.rb, line 11 def <<(*args) super(*convert_args(args)) end
convert_args(args)
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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)
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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)
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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()
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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()
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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