Class: Yajl::Deflate::StreamReader

Inherits:
Zlib::Inflate
  • Object
show all
Defined in:
lib/yajl/deflate/stream_reader.rb

Overview

This is a wrapper around Zlib::Inflate, creating a #read method that adheres to the IO spec, allowing for two parameters (length, and buffer)

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(io, options) ⇒ StreamReader

Wrapper to the initialize method so we can set the initial IO to parse from.



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# File 'lib/yajl/deflate/stream_reader.rb', line 8

def initialize(io, options)
  @io = io
  super(options)
end

Class Method Details

.parse(input, options = {}, buffer_size = nil, &block) ⇒ Object

Helper method for one-off parsing from a deflate-compressed stream

See Yajl::Parser#parse for parameter documentation



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# File 'lib/yajl/deflate/stream_reader.rb', line 29

def self.parse(input, options={}, buffer_size=nil, &block)
  if input.is_a?(String)
    input = StringIO.new(input)
  end

  if options.is_a?(Hash)
    deflate_options = options.delete(:deflate_options)
    Yajl::Parser.new(options).parse(new(input, deflate_options), buffer_size, &block)
  elsif options.is_a?(Fixnum)
    Yajl::Parser.new.parse(new(input, options), buffer_size, &block)
  end
end

Instance Method Details

#read(len = nil, buffer = nil) ⇒ Object

A helper method to allow use similar to IO#read



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# File 'lib/yajl/deflate/stream_reader.rb', line 14

def read(len=nil, buffer=nil)
  if val = @io.read(len)
    unless buffer.nil?
      buffer.replace(inflate(val))
      return buffer
    end
    inflate(@io.read(len))
  else
    nil
  end
end