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--- 中间件示例： 为每个请求注入一些通用的变量
local lor = require("lor.index")
return function()
return function(req, res, next)
-- res.locals是一个table, 可以在这里注入一些“全局”变量
-- 这个示例里注入app的名称和版本号， 在渲染页面时即可使用
res.locals.app_name = "lor application"
res.locals.app_version = lor.version or ""
next()
end