将参数传递给异步中间件 [英] Express pass parameter to async middleware

问题描述

我有一个同步中间件来授权角色.设置如下:

I have a synchronous middleware to authorize role. It's set up like this:

路线:

router.get("/test", [authorizeRole("tier1", "tier2")], function(req, res) {})

中间件:

module.exports = function authorizeRoles(...role) {
    return (request, response, next) => {
        //authorize
    };
};

这正在工作.现在，我想更改中间件以使其异步.

This is working. Now i want to change my middleware to make it async.

我不知道如何使中间件异步.我试过了:

I can't figure out how to make the middleware async. I tried:

module.exports = async function authorizeRoles(...role) {
    return await (request, response, next) => {
        //authorize
    };
};

module.exports = async function authorizeRoles(...role) {
    return await async (request, response, next) => {
        //authorize
    };
};

但是什么都行不通.

如何使中间件异步?

推荐答案

我不确定我是否完全理解您的问题.要使用await，您需要使用async关键字声明函数，因此应该可以使用

I'm not sure I completely understood your question. To use await you need to declare your function using the async keyword, so this should work

module.exports = function authorizeRoles(...role) {
    return async (request, response, next) => {
        // now you can use `await` here
    };
};

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