Cannot get / in Node.js app how to redirect?

Question

Cannot get / in Node.js app how to redirect?

I have written app.get() for all url's which has a function. Is there a way to call a function if URL is not defined?

Angular has an otherwise method, similarly is there any other function to redirect undefined URL's in Node.js?

app.post('/registration',register);

app.get('/user',UserRegistration);

If i call a /users which is not written what function to be called to redirect it to index.html page.

node.js

Answer 1

If you are using Node.js without framework, your code should look like:

var http = require('http'),
    url = require('url');

function parse (req, callback) {
    var path = [],
        u;

    u = url.parse(req);
    path = u.pathname.split('/');

    callback(path);
}

function send_cat2 (req, res, n) {
    //Generate /cat2/n
    //Send page n
}

http.createServer(function(req, res) {
    var path = parse(req);
    if(path[0] === 'cat1') {
        if(path[1] === 'page1') {
            // /cat1/page1
        } else if (path[1] === 'page2') {
            // /cat1/page2
        } else {
            // 404
        }
    } else if (path[0] === 'cat2') {
        // /cat2/n
        send_cat2(req, res, parseInt(path[1]));
    } else {
        // 404
    }
});

Answer 2

You can use middleware

app.use(function(req, res, next) {
    res.redirect('/');
});

more info here