Detect Platform Health Checks

detect.rb

# Platform health check ip addresses.
#
HEALTH_CHECK_ADDRS = [
  IPAddr.new("209.85.152.0/22"),
  IPAddr.new("209.85.204.0/22"),
  IPAddr.new("35.191.0.0/16"),
  IPAddr.new("130.211.0.0/22"),
  IPAddr.new("35.191.0.0/16")
]

# This should be a helper method.
#
def health_check?
  remote_ip = IPAddr.new(req.ip)
  HEALTH_CHECK_ADDRS.any? { |addr|
    addr === remote_ip
  }
rescue IPAddr::InvalidAddressError
end