这种方法更简单，但它必须是所有路线之后的最后一件事。

app.use( (req, res) => {
    //render page not found 
    res.render('404')
})

在某些情况下，404页面不能被写入并作为最后一个路由执行，特别是如果您有一个异步路由功能，从而引入了一个迟到的/路由。在这些情况下可以采用下面的模式。

var express = require("express.io"),
    app = express(),
    router = express.Router();

router.get("/hello", function (req, res) {
    res.send("Hello World");
});

// Router is up here.
app.use(router);

app.use(function(req, res) {
    res.send("Crime Scene 404. Do not repeat");
});

router.get("/late", function (req, res) {
    res.send("Its OK to come late");
});

app.listen(8080, function (){
    console.log("Ready");
});

如果你想从你的函数(路由)重定向到错误页面，那么做以下事情-

Add general error messages code in your app.js - app.use(function(err, req, res, next) { // set locals, only providing error in development res.locals.message = err.message res.locals.error = req.app.get('env') === 'development' ? err : {} // render the error page // you can also serve different error pages // for example sake, I am just responding with simple error messages res.status(err.status || 500) if(err.status === 403){ return res.send('Action forbidden!'); } if(err.status === 404){ return res.send('Page not found!'); } // when status is 500, error handler if(err.status === 500) { return res.send('Server error occured!'); } res.render('error') }) In your function, instead of using a error-page redirect you can use set the error status first and then use next() for the code flow to go through above code - if(FOUND){ ... }else{ // redirecting to general error page // any error code can be used (provided you have handled its error response) res.status(404) // calling next() will make the control to go call the step 1. error code // it will return the error response according to the error code given (provided you have handled its error response) next() }

上面的代码对我不起作用。

所以我找到了一个真正有效的新解决方案!

app.use(function(req, res, next) {
    res.status(404).send('Unable to find the requested resource!');
});

或者您甚至可以将其呈现到404页面。

app.use(function(req, res, next) {
    res.status(404).render("404page");
});

希望这对你有所帮助!

我在定义所有路由后所做的是捕捉潜在的404并转发到错误处理程序，如下所示:

    const httpError = require('http-errors');

    ...

    // API router
    app.use('/api/', routes);
    
    // catch 404 and forward to error handler
    app.use((req, res, next) => {
      const err = new httpError(404)
      return next(err);
    });

    module.exports = app;

发送到自定义页面:

app.get('*', function(req, res){
  if (req.accepts('html')) {
     res.send('404', '<script>location.href = "/the-404-page.html";</script>');
     return;
  }
});