Connecting to redistogo instance on Heroku from lua

connect_redis

function M.connect_redis(red)
  redisurl = os.getenv("REDISTOGO_URL")
  redisurl_connect = string.split(redisurl, ":")[3]
  redisurl_user = string.split(redisurl_connect, "@")[1]
  redisurl_host = string.split(redisurl_connect, "@")[2]
  redisurl_port = tonumber(string.split(redisurl, ":")[4])
  
  local ok, err = red:connect(redisurl_host, redisurl_port)
  if not ok then
    ngx.say("failed to connect: ", err)
    ngx.exit(ngx.HTTP_OK)
  end

  local res, err = red:auth(redisurl_user)
  if not res then
    ngx.say("failed to authenticate: ", err)
    return
  end

  return ok, err
end