Why advanced patterns solve real problems in Rest API - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a simple GET endpoint that returns a welcome message.

Rest API

app.get('/welcome', (req, res) => {
  res.[1]('Welcome to the API!');
});

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

Ajson

Bsend

Cwrite

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using res.json instead of res.send

Using res.status without sending a response

The send method sends a response body as a string or buffer.

2fill in blank

medium

Complete the code to parse JSON data from a POST request body.

Rest API

app.use([1]());

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

Aexpress.json

Bexpress.urlencoded

CbodyParser.text

DbodyParser.raw

Attempts:

3 left

💡 Hint

Common Mistakes

Using urlencoded middleware for JSON data

Using deprecated bodyParser modules

express.json() middleware parses incoming JSON requests and puts the parsed data in req.body.

3fill in blank

hard

Fix the error in the route handler to correctly extract the user ID from the URL parameter.

Rest API

app.get('/user/:id', (req, res) => {
  const userId = req.[1].id;
  res.send(`User ID is ${userId}`);
});

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Aparams

Bbody

Cquery

Dheaders

Attempts:

3 left

💡 Hint

Common Mistakes

Using req.body instead of req.params

Using req.query for URL parameters

URL parameters are accessed via req.params.

4fill in blank

hard

Fill both blanks to create a middleware that logs the HTTP method and URL of each request.

Rest API

app.use((req, res, next) => {
  console.log(req.[1] + ' ' + req.[2]);
  next();
});

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

Amethod

Burl

Cpath

Dquery

Attempts:

3 left

💡 Hint

Common Mistakes

Using req.path instead of req.url

Logging req.query which is the query parameters

req.method gives the HTTP method, and req.url gives the requested URL.

5fill in blank

hard

Fill all three blanks to create a route that responds with JSON containing the user's name and age if age is greater than 18.

Rest API

app.post('/check', (req, res) => {
  const { name, age } = req.body;
  if (age [1] 18) {
    res.[2]({ [3] });
  } else {
    res.status(403).send('Forbidden');
  }
});

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

A>

Bjson

Cname, age

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using <= instead of >

Using res.send instead of res.json

Not sending the correct data object

The condition checks if age is greater than 18. The response sends JSON with name and age.