Module: Moneta::Transformer::Helper

### Home Classes Methods

### In Files

- lib/moneta/transformer/helper.rb

### Methods

- #escape
- #hmacsign
- #hmacverify
- #spread
- #truncate
- #unescape

### Files

- LICENSE

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No matching classes.

# Moneta::Transformer::Helper

@api private

### Public Instance Methods

escape(value) click to toggle source

    # File lib/moneta/transformer/helper.rb, line 7
    def escape(value)
      value.gsub(/[^a-zA-Z0-9_-]+/){ '%' + $&.unpack('H2' * $&.bytesize).join('%').upcase }
    end

hmacsign(value, secret) click to toggle source

    # File lib/moneta/transformer/helper.rb, line 20
    def hmacsign(value, secret)
      OpenSSL::HMAC.digest(OpenSSL::Digest::Digest.new('sha256'), secret, value) << value
    end

hmacverify(value, secret) click to toggle source

    # File lib/moneta/transformer/helper.rb, line 15
    def hmacverify(value, secret)
      hash, value = value[0..31], value[32..-1]
      value if hash == OpenSSL::HMAC.digest(OpenSSL::Digest::Digest.new('sha256'), secret, value)
    end

spread(value) click to toggle source

    # File lib/moneta/transformer/helper.rb, line 32
    def spread(value)
      ::File.join(value[0..1], value[2..-1])
    end

truncate(value, maxlen) click to toggle source

    # File lib/moneta/transformer/helper.rb, line 24
    def truncate(value, maxlen)
      if value.size >= maxlen
        digest = Digest::MD5.hexdigest(value)
        value = value[0, maxlen-digest.size] << digest
      end
      value
    end

unescape(value) click to toggle source

    # File lib/moneta/transformer/helper.rb, line 11
    def unescape(value)
      value.gsub(/((?:%[0-9a-fA-F]{2})+)/){ [$1.delete('%')].pack('H*') }
    end

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