webClient.rb

require 'uri'
require 'net/http'

def get_server_connection(arg1, arg2)
  http = nil
  retries = 0

  uri = URI("http://localhost:8089/")
  
  begin
    unless http
      puts "Opening TCP connection..."
      http = Net::HTTP.start(uri.host, uri.port, read_timeout: 5)
    end
    puts "Executing HTTP request..."
    res = http.request_get(uri.path)
    puts res.code, res.body
    return res
  rescue Errno::ECONNREFUSED, Net::ReadTimeout => e 
    # timeout would throw ReadTimeout exception
    if (retries+=1) <= 3
      puts "Timeout (#{e}), retrying in 1 second..."
      sleep(retries) # Sleep more with each failure
      retry # re-run the code!!
    else
      raise # All retries failed, raise the `last` seen exception
    end
  ensure
    if http
      puts "Closing the TCP connection..."
      http.finish
    end
  end
end

def handle_backend_response(arg1, arg2)
  res = get_server_connection(arg1, arg2)
  unless res.nil? # did we get a response?
    puts res.code, res.body
    if res.code == "200"
      return get_body_from_response(res.body)
    end
    if res.code == "404"
      # handle 404 as you wish
      return nil
    else
      puts "service unavailable"
      return nil
    end
  end
end