问题描述
在 express
中,您可以添加中间件,例如 app.use(cors())
将其添加到所有端点,但是我找不到类似的东西在firebase示例中.这里是示例(见下文)如何将其应用于每个功能.但是,我想全局应用中间件(cors 或其他),因为我有很多功能.
In express
you can add middleware such as app.use(cors())
which adds it to all of the endpoints, however I can't find something similar in firebase examples. Here is the example (see below) of how to apply it in every function. However I want to apply the middleware (cors or other) globally, as I have many functions.
import * as cors from 'cors';
const corsHandler = cors({origin: true});
export const exampleFunction= functions.https.onRequest(async (request, response) => {
corsHandler(request, response, () => { return handler(req, res) });
});
firebase 中 app.use()
的等价物是什么?是否添加和快递服务器 仅选项?
What is the equivalent of app.use()
in firebase? Is adding and express server the only option?
推荐答案
使用柯里化来创建处理程序,你必须在所有函数中重复它,但它比每次编写中间件更容易:
Use currying to create a handler, you have to repeat it across all the functions, but it's easier than writing the middleware each time:
const applyMiddleware = handler => (req, res) => {
return cors(req, res, () => {
return handler(req, res)
})
}
exports.handler = functions.https.onRequest(applyMiddleware(handler))
编辑,更复杂的中间件示例:
const applyMiddleware =
(handler, { authenticatedRoute = false } = {}) =>
(req, res) => {
if (authenticatedRoute) {
const isAuthorized = isAuthenticated(req)
if (!isAuthorized) {
return res.status(401).send('Unauthorized')
}
}
return cors(req, res, () => {
return handler(req, res)
})
}
exports.handler = functions.https.onRequest(
applyMiddleware(handler, { authenticatedRoute: true })
)
这篇关于将中间件添加到一行/函数中的所有 firebase 函数的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!