如何将请求委托给 nodejs express 中的特定路由？

Question

const API_VERSION = {
    "authenticate"     : "v1",
    "users'"           : "v1",
    "requests"         : "v2",
}

I have following routes:

app.use('/api/v1/authenticate', authenticate);
app.use('/api/v1/users', users);
app.use('/api/v1/requests', requestService);
app.use('/api/v2/requests', requestService_v2);

If a request comes for say api/v1/authenticate , then it should be re-routed to api/v2/authenticate .

I tried

app.use('/api/v2/*', (req, res, next) => {
    const originalUrl = req.originalUrl;
    const endPoint = originalUrl.match(/(?<=\/[^\/]*\/[^\/]*\/)[^\/]+(?=\/)/g)[0].toLowerCase();
    req.baseUrl = req.originalUrl.replace("v2", API_VERSIONS[endPoint]);
    next('route');
});

But this does not work.

Answer 1

I use app all and pipe the request after modifying the url. You can also reroute it to a diff. server eg

  API_V1 = '/api/v1'
  app.all('/api/v2/*', (req, res)->
    url = API_V1 + req.url
    req.pipe(request[req.method.toLowerCase()](url, (error)->
      res.json({err: error}) if error?
    )).pipe(res).on
  )

I haven't tried your code but maybe just call next()

Answer 2

I did the following

app.use('/api/v2/*', (req, res, next) => {
    const originalUrl = req.originalUrl;
    const endPoint = originalUrl.match(/(?<=\/[^\/]*\/[^\/]*\/)[^\/]+(?=\/)/g)[0].toLowerCase();
    const url = req.originalUrl.replace("v2", API_VERSIONS[endPoint]);
    res.redirect(307, url);
});

It works, but I'm eager to know if there's any other way to do it.