Nginx Lua读取redis 进行权限认证操作

location /{
	set $tomcat_ip '';
	rewrite_by_lua '
		local redis = require "resty.redis"
		local red = redis::new()
		
		red:set_timeout(1000) -- 1 sec
		local ok,err = red:connection("127.0.0.1",6379)
		if not ok then
			ngx.say("fail to connect: ", err)
			return
		end
		
		--请注意这里auth的调用过程
		local count
		count,err = red:get_refused_times()
		if 0 == count then 
			ok,err = red:auth("aaaa")
			if not ok then
				ngx.say("fail to auth: ",err)
				return
			end
		elseif err then
			ngx.say("failed to get reused times: ", err)
			return 
		end
		
		local resp,err = red:get("dog")
		if not resp then
			ngx.say("get msg error: ", err)
			return err
		end
		
		if resp == ngx.null then
			ngx.say("this is not redis data")
			return null
		end
		ngx.var.tomcat_ip=resp
		-- ngx.say("set result: ", ok)
	';
	#echo $tomcat_ip
	proxy_pass $tomcat_ip
}