Question

我正在尝试将 自定义中间件 添加到自定义next.js服务器。但是，没有可绑定中间件的特定路径模式，因为这些URL是由我们的CMS生成的，几乎可以是任何东西。所以我想说我的中间件最后一个。作为最终的包罗万象。但是我找不到有关如何实现此目标的任何文档。

我试图将中间件放在最后，但这导致它从未被调用。

工作但是很丑陋，并且没有未来的证明

//Our custom middleware first
server.get('*', [customMiddleware, standardMiddleware])
...
const customMiddleware = async function (req, res, next) {
  const parsedUrl = parse(req.url, true)
  const { pathname, query } = parsedUrl
  console.log("Custom middleware. pathname: " + pathname)
  if (pathname.startsWith("/babel/") || pathname.startsWith("/_next/") || pathname.startsWith("/static/") ...etc) {
    return next()
  }
  ///Custom logic here...
}

const standardMiddleware = function (req, res, next) {
  const parsedUrl = parse(req.url, true)
  const { pathname, query } = parsedUrl
  console.log("Standard middleware. pathname: " + pathname)
  return handle(req, res)
}

不起作用：

//Our custom middleware last
server.get('*', [standardMiddleware, customMiddleware])
...
const standardMiddleware = function (req, res, next) {
  const parsedUrl = parse(req.url, true)
  const { pathname, query } = parsedUrl
  console.log("Standard middleware. pathname: " + pathname)
  return handle(req, res)
}

const customMiddleware = async function (req, res, next) {
  const parsedUrl = parse(req.url, true)
  const { pathname, query } = parsedUrl
  console.log("Custom middleware. pathname: " + pathname)
  ///Custom logic here...
}

当我运行上面标记为“ Not working” 的代码时，我希望next.js处理它可以处理的所有请求，然后回退到 customMiddleware 。实际发生的是，它永远不会回退到 customMiddleware ，它只会为未知路径返回 404 。

更新2019-02-13

由于当前的NextJS代码似乎无法实现，因此我将其添加为file。

Answer 1

为了说明我在上面的评论：

const standardMiddleware = function (req, res, next) { // next is a callback argument here
  const parsedUrl = parse(req.url, true)
  const { pathname, query } = parsedUrl
  console.log("Standard middleware. pathname: " + pathname)
  return handle(req, res, next); // pass it along
}
...
function handle(req, res, next) {
  ...
  if (noRouteEventuallyMatched) {
    // res.status(404).sendFile('/path/to/my404.html');
    next(); // instead of setting res, call next so that the next element in the chain is tried
  }
}

将自定义中间件放在自定义next.js服务器的链中？

更新2019-02-13

1 个答案: