How to get requested page (node.js)

Question

I am currently working with Node.js servers. When I access the server, the following code executes: res.write("Whatever text you choose"); For example, when I navigate to localhost:9090, I receive the expected file. However, if I try to access localhost:9090/index.html, localhost:9090/funnyFile/Jokes.html, or localhost:9090/myProjects/poj1/index.html, I still receive the same file. I would like to know how to configure the server to serve different files based on the URL path.

Here is the code for my Node.js server:

const http = require('express')
const port = 9090

// Create a server object:
const server = http.createServer(function (req, res) {

    // Write a response to the client
    res.write("I choose this text");
    

    // End the response 
    res.end()
})

// Set up our server so it will listen on the port
server.listen(port, function (error) {

    // Checking any error occur while listening on port
    if (error) {
        console.log('Something went wrong', error);
    }
    // Else sent message of listening
    else {
        console.log('Server is listening on port' + port);
    }
})

Answer 1

Turns out I needed to install and require both fs and path (and use http instead of express). This works very well (unless you are importing something):

const http = require('http');
const fs = require('fs');
const path = require('path');

const server = http.createServer((req, res) => {
    const filePath = path.join(__dirname, req.url);

    fs.stat(filePath, (err, stats) => {
        if (err || !stats.isFile()) {
            fs.readdir(__dirname, (err, files) => {
                if (err) {
                    res.statusCode = 500;
                    res.setHeader('Content-Type', 'text/plain');
                    res.end('Internal Server Error');
                    return;
                }

                res.statusCode = 404;
                res.setHeader('Content-Type', 'text/plain');
                res.end(`This page can't be found. Available files:\n${files.join('\n')}`);
            });
            return;
        }

        fs.createReadStream(filePath).pipe(res);
    });
});

const port = 3000;
server.listen(port, () => {
    console.log(`Server running at http://localhost:${port}/`);
});

Although I like the answer provided by M Z.