Hacky network probe script. Prints to terminal-notifier when done (it's notify-send for mac)

Gemfile

# frozen_string_literal: true

source "https://rubygems.org"

git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }


gem "terminal-notifier"
gem "typhoeus"

probe.rb

#!/usr/bin/env ruby

require "typhoeus"

usage = <<-DOC
service_healthy
======
Checks URL for response code. Prints to terminal-notifier when complete.
DOC

class HealthCheck
  attr_accessor :healthy, :resp, :host, :timestamp
  def initialize(host, healthy, resp, timestamp)
    @host = host
    @healthy = healthy
    @resp = resp
    @timestamp = timestamp
  end
  def healthy?
    @healthy
  end
  def request_summary
    summary = ["", "#{@host}"]
    summary.push "======"
    summary.push "Healthy?: #{healthy?}"
    summary.push "Response code: #{@resp.response_code}"
    summary.push "Response time: #{@resp.time}"
    summary.push "Timestamp: #{@timestamp}"
    summary.join("\n")
  end
end

def log m, level
  puts m if level == :info
end

def dirty_exit m, print_usage = false
  puts m
  puts usage if print_usage
  exit 1
end

def notify_healthy msg
  `terminal-notifier -title #{"Service Healthy"} -message #{msg}`
end

def check_status url
  t = Time.now
  resp = Typhoeus.get(url, followlocation: true)
  # TODO Build HealthDecisionLogic object to mediate between
  # User-supplied health logic and HealthCheck health evaluation
  is_200 = resp.response_code == 200
  health = HealthCheck.new(url, is_200, resp, t)
end

if ARGV.length == 0
  dirty_exit "First argument should be URL to service to monitor for 200's"
end

u_count = 0
while (u = ARGV.pop; u_count += 1; u != nil)
  log "processing #{u}", :info
  until (health = check_status(u); health.healthy?)
    log health.request_summary, :info
    sleep 10
  end
  notify_healthy "#{u} is now healthy"
end