Simple Status Ticker for API Endpoints

status.rb

require 'HTTParty'
require 'terminal-display-colors'
require 'json'

# set your endpoints!
endpoints = {
  "Google" => "http://google.com",
  "Twitter" => "http://twitter.com"
}
# seconds to sleep between pings
sleep_seconds = 10

buffer = []

def diff start, finish
  ((finish-start) * 1000.0).round(2)
end

def print_flush str
  print str
  $stdout.flush
end

while(true)
  # clear terminal
  buffer << "\e[H\e[2J"
  response_times = []
  # loop endpoints
  endpoints.each do |name, url|
    begin
      t1 = Time.now
      response = HTTParty.get url
      t2 = Time.now
      if response.code == 200
        response_times << diff(t1,t2)
        buffer << "#{name.upcase} : " + response.message.green + " (#{response_times.last}ms)".yellow
      else
        buffer << "#{name.upcase} : " + response.message.red
      end
    rescue => e
      buffer << "#{name.upcase} : " + 'Connection Error'.red 
    end
  end

  buffer << "\n"
  # display avg and max response times
  unless response_times.empty?
    buffer << "avg : #{(response_times.inject{ |sum, el| sum + el }.to_f / response_times.size).round(2)}ms".cyan
    buffer << "max : #{response_times.max}ms".cyan
  else
    buffer << 'No response times.'.cyan
  end
  # send buffered text to terminal
  puts buffer.join("\n")
  buffer.clear

  # sleep
  sleep_seconds.times do
    sleep 1
    print_flush '.'
  end
end