API versioning strategies in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set up a basic Express server.

Node.js

const express = require('[1]');
const app = express();
app.listen(3000, () => console.log('Server running'));

Drag options to blanks, or click blank then click option'

Apath

Bhttp

Cexpress

Dfs

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'http' instead of 'express' to create the server.

The Express library is required to create the server.

2fill in blank

medium

Complete the code to define a versioned API route using URL path versioning.

Node.js

app.use('/api/[1]/users', (req, res) => res.send('User list'));

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Av1

Bv2

Cversion1

Dapi

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'api' instead of a version number in the path.

Using 'v1' in the URL path is a common way to version APIs.

3fill in blank

hard

Fix the error in the code to read the API version from a custom header.

Node.js

app.use((req, res, next) => {
  const version = req.headers['[1]'];
  if (version === '1') next();
  else res.status(400).send('Invalid API version');
});

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Aapi-version

Bapi_version

Cversion

Dx-api-version

Attempts:

3 left

💡 Hint

Common Mistakes

Using standard header names that don't exist.

Custom headers often use the 'x-' prefix, like 'x-api-version'.

4fill in blank

hard

Fill both blanks to implement query parameter versioning in Express.

Node.js

app.get('/users', (req, res) => {
  const version = req.query.[1];
  if (version === '[2]') res.send('User list v1');
  else res.status(400).send('Unsupported version');
});

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Aversion

Bv

Cv1

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'v' as the query parameter name instead of 'version'.

The query parameter 'version' is checked for the value 'v1' to serve version 1 of the API.

5fill in blank

hard

Fill all three blanks to implement header versioning with middleware.

Node.js

app.use((req, res, next) => {
  const version = req.headers['[1]'];
  if (version === '[2]') {
    req.apiVersion = '[3]';
    next();
  } else {
    res.status(400).send('Invalid API version');
  }
});

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Ax-api-version

Bv1

C1

Dapi-version

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'api-version' without the 'x-' prefix.

The middleware reads the 'x-api-version' header, checks for 'v1', and sets the internal version to '1'.