vcr/vcr

module VCR
  # Ruby 1.8 provides Ping.pingecho, but it was removed in 1.9.
  # This is copied, verbatim, from Ruby 1.8.7's ping.rb.
  require 'timeout'
  require "socket"

  # @private
  module Ping
    def pingecho(host, timeout=5, service="echo")
      begin
        Timeout.timeout(timeout) do
          s = TCPSocket.new(host, service)
          s.close
        end
      rescue Errno::ECONNREFUSED
        return true
      rescue Timeout::Error, StandardError
        return false
      end
      return true
    end
    module_function :pingecho
  end

  # @private
  module InternetConnection
    extend self

    EXAMPLE_HOST = "example.com"

    def available?
      @available = VCR::Ping.pingecho(EXAMPLE_HOST, 1, 80) unless defined?(@available)
      @available
    end
  end
end