Module: JsonMinify

Defined in:
lib/json_minify.rb,
lib/json_minify/version.rb

Constant Summary collapse

VERSION = 
"0.2.1"

Instance Method Summary collapse

Instance Method Details

#minify(str) ⇒ Object 



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# File 'lib/json_minify.rb', line 7

def minify(str)
  ss, buf = StringScanner.new(str), ''

  until ss.eos?
    # Remove whitespace
    if s = ss.scan(/\s+/)

    # Scan punctuation
    elsif s = ss.scan(/[{},:\]\[]/)
      buf << s

    # Scan strings
    elsif s = ss.scan(/"(.*?[^\\])?"/)
      buf << s

    # Scan reserved words
    elsif s = ss.scan(/(true|false|null)/)
      buf << s

    # Scan numbers
    elsif s = ss.scan(/-?\d+([.]\d+)?([eE][-+]?[0-9]+)?/)
      buf << s

    # Remove C++ style comments
    elsif s = ss.scan(%r<//>)
      ss.scan_until(/(\r?\n|$)/)

    # Remove C style comments
    elsif s = ss.scan(%r'/[*]')
      ss.scan_until(%r'[*]/') or raise SyntaxError, "Unterminated /*...*/ comment - #{ss.rest}"

    # Anything else is invalid JSON
    else
      raise SyntaxError, "Unable to pre-scan string: #{ss.rest}"
    end
  end
  buf
end