Telnet test

telnet.rb

require 'net/telnet'

class Client
  # Fetch weather forecast for NYC.
  #
  # @return [String]
  def response
    fetch_all_in_one_response
    # fetch_multiple_responses
  ensure
    disconnect
  end

  private

  # Do all the commands at once and return everything on one go.
  #
  # @return [String]
  def fetch_all_in_one_response
    client.cmd("\nNYC\nX\n")
  end

  # Do multiple calls to retrieve the final forecast.
  #
  # @return [String]
  def fetch_multiple_responses
    client.cmd("\r") do
      client.cmd("NYC\r") do
        client.cmd("X\r") do |forecast|
          return forecast
        end
      end
    end
  end

  # Connect to remote server.
  #
  # @return [Net::Telnet]
  def client
    @client ||= Net::Telnet.new(
      'Host'       => 'rainmaker.wunderground.com',
      'Timeout'    => false,
      'Output_log' => File.open('output.log', 'w')
    )
  end

  # Close connection to the remote server.
  def disconnect
    client.close
  end
end

forecast = Client.new.response
puts forecast