Nginx Lua Redis rewrites

leandro.test

lua_package_path "/home/vagrant/ngx_openresty-1.7.10.1/bundle/lua-resty-redis-0.20/lib/?.lua;;";

server {
	listen 80;
	root /vagrant/test;
	index index.html index.htm;
	server_name leandro.test;

	location / {
		include /vagrant/rewrites.lua;
	}
}

rewrites.lua

access_by_lua '
local redis = require "resty.redis"
local red = redis:new()

red:set_timeout(1000) -- 1 sec

local ok, err = red:connect("127.0.0.1", 6379)
if not ok then
        ngx.say("failed to connect: ", err)
        return
end

local uri =  string.gsub(ngx.var.request_uri, "?.*", "")
local params = string.gsub(ngx.var.request_uri, uri, "")

local res, err = red:get(uri)

if not res then
    ngx.req.set_uri(ngx.var.request_uri)
    return
end

if res == ngx.null then
    ngx.req.set_uri(ngx.var.request_uri)
    return
end

if params~=nil then
    ngx.req.set_uri_args(params)
end

ngx.req.set_uri("/" .. res)
';