tiny_redis_client.rb

tiny_redis.rb

# Copyright 2017 Maksym Melnychok
# MIT License - https://opensource.org/licenses/MIT
#
# inspired by https://github.com/ptrofimov/tinyredisclient

require 'socket'

class TinyRedis
  RN = "\r\n"

  def initialize(host='localhost', port=6379)
    @socket = TCPSocket.new(host, port)
  end

  def method_missing(method, *args)
    args.unshift method
    data = ["*#{args.size}", *args.map {|arg| "$#{arg.to_s.size}#{RN}#{arg}"}]
    @socket.write(data.join(RN) << RN)
    parse_response
  end

  def parse_response
    case line = @socket.gets
    when /^\+(.*)\r\n$/ then $1
    when /^:(\d+)\r\n$/ then $1.to_i
    when /^-(.*)\r\n$/  then raise "Redis error: #{$1}"
    when /^\$([-\d]+)\r\n$/
      $1.to_i >= 0 ? @socket.read($1.to_i+2)[0..-3] : nil
    when /^\*([-\d]+)\r\n$/
      $1.to_i > 0 ? (1..$1.to_i).inject([]) { |a,_| a << parse_response } : nil
    end
  end
  
  def close
    @socket.close
  end
end

yeah, MIT it is then

Copyright 2017 Maksym Melnychok

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.