How can I implement custom logging middleware in my application?

How can I implement custom logging middleware in my application?

To implement custom logging middleware, you can create a function that logs requests and responses. What framework are you using?

I'm using Express.js for my Node.js application.

Great! You can create a middleware function like this: app.use((req, res, next) => { console.log(req.method, req.url); next(); }); This will log the HTTP method and URL.

How can I log the response time as well?

You can use Date.now() to capture the start time before the request and then calculate the duration after the response is sent. Here's an example.

Can you show me the complete code for that?

Sure! Here's a complete example:

app.use((req, res, next) => {
    const start = Date.now();
    res.on('finish', () => {
        const duration = Date.now() - start;
        console.log(`${req.method} ${req.url} - ${duration}ms`);
    });
    next();
});