Why API security is non-negotiable in Rest API - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add an API key check in the request headers.

Rest API

if request.headers.get('[1]') != 'my_secret_key':
    return {'error': 'Unauthorized'}, 401

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

AApi-Key

BAuthorization

CContent-Type

DUser-Agent

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Authorization' or 'Content-Type' instead of 'Api-Key'.

The API key is usually sent in the 'Api-Key' header to authenticate requests.

2fill in blank

medium

Complete the code to enforce HTTPS for API requests.

Rest API

if not request.url.startswith('[1]'):
    return {'error': 'Use HTTPS'}, 403

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

Aws://

Bhttps://

Cftp://

Dhttp://

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'http://' which is not secure.

HTTPS ensures encrypted communication, which is essential for API security.

3fill in blank

hard

Fix the error in the code to correctly parse JSON data from the API request.

Rest API

data = request.[1]()

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

Aparse_json

Bjson

Cjsonify

Dget_json

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'json' which is an attribute, not a method.

Using 'jsonify' which is for creating JSON responses.

In many frameworks, 'get_json()' is the method to parse JSON from the request body.

4fill in blank

hard

Fill both blanks to create a rate limiter that allows 100 requests per minute.

Rest API

limiter = RateLimiter([1]=100, [2]=60)

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

Amax_requests

Bduration

Cinterval

Dlimit

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing 'duration' with 'interval'.

Using 'limit' instead of 'max_requests'.

'max_requests' sets the allowed requests, and 'interval' sets the time window in seconds.

5fill in blank

hard

Fill all three blanks to create a secure API endpoint that requires authentication and returns JSON.

Rest API

@app.route('/data')
@[1]
def get_data():
    data = fetch_data()
    return [2](data), [3]

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

Alogin_required

Bjsonify

C200

Dauthenticate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'authenticate' instead of a decorator.

Returning raw data without 'jsonify'.

'login_required' decorator enforces authentication, 'jsonify' formats the response as JSON, and '200' is the HTTP success status code.

Practice

1. Why is API security considered non-negotiable in software development?

easy

A. It reduces the size of the API response.

B. It makes the API run faster.

C. It protects sensitive data and prevents unauthorized access.

D. It allows unlimited access to everyone.

Solution

1. Step 1: Understand the purpose of API security

   API security is designed to protect sensitive data and control who can access the API.

2. Step 2: Analyze the options

   Only It protects sensitive data and prevents unauthorized access. mentions protection and preventing unauthorized access, which is the main goal of API security.

3. Final Answer:

   It protects sensitive data and prevents unauthorized access. -> Option C

4. Quick Check:

   API security = protect data and access [OK]

Hint: Remember: security means protecting data and access [OK]

Common Mistakes:

• Thinking security speeds up API
• Confusing security with data size
• Assuming open access is secure

2. Which of the following is the correct way to secure an API endpoint?

easy

A. Require an API key or token for access.

B. Use HTTP instead of HTTPS for faster connection.

C. Allow all IP addresses without restrictions.

D. Send sensitive data in URL parameters.

Solution

1. Step 1: Identify secure practices for API endpoints

   Using API keys or tokens is a standard way to control access to APIs.

2. Step 2: Evaluate each option

   Require an API key or token for access. requires keys or tokens, which is correct. Options A, C, and D are insecure practices.

3. Final Answer:

   Require an API key or token for access. -> Option A

4. Quick Check:

   API security = keys or tokens [OK]

Hint: Always require keys or tokens to secure APIs [OK]

Common Mistakes:

• Using HTTP instead of HTTPS
• Allowing unrestricted IP access
• Exposing sensitive data in URLs

3. Consider this code snippet for an API call:

fetch('https://api.example.com/data', {
  headers: { 'Authorization': 'Bearer abc123' }
})
.then(response => response.json())
.then(data => console.log(data));

What is the main purpose of the 'Authorization' header here?

medium

A. To provide a token proving the caller's identity.

B. To encrypt the data sent to the API.

C. To set the API response timeout.

D. To specify the data format expected.

Solution

1. Step 1: Understand the 'Authorization' header role

   The 'Authorization' header carries credentials like tokens to prove who is calling the API.

2. Step 2: Match the header purpose with options

   To provide a token proving the caller's identity. correctly states it provides a token for identity verification. Other options describe unrelated functions.

3. Final Answer:

   To provide a token proving the caller's identity. -> Option A

4. Quick Check:

   Authorization header = token for identity [OK]

Hint: Authorization header carries tokens for access [OK]

Common Mistakes:

• Confusing authorization with data format
• Thinking it sets timeout
• Assuming it encrypts data

4. You have this API security code snippet:

app.get('/user', (req, res) => {
  if (!req.headers['api_key']) {
    res.status(401).send('Unauthorized');
    return;
  }
  res.send('User data');
});

What is the main problem with this code?

medium

A. It does not handle errors properly.

B. It uses the wrong HTTP method for security.

C. It sends user data before checking the key.

D. It does not check if the API key is valid.

Solution

1. Step 1: Analyze the API key check

   The code only checks if the 'api_key' header exists but does not verify if it is correct or valid.

2. Step 2: Understand the security implication

   Without validating the key, anyone sending any 'api_key' header can access the data, which is insecure.

3. Final Answer:

   It does not check if the API key is valid. -> Option D

4. Quick Check:

   API key must be validated, not just present [OK]

Hint: Check key validity, not just presence [OK]

Common Mistakes:

• Assuming presence means valid
• Confusing HTTP method with security
• Ignoring error handling importance

5. You want to secure an API that returns user profiles. Which combination of methods best ensures security and privacy?

hard

A. Allow all requests but log IP addresses for later review.

B. Use HTTPS, require API tokens, and validate user permissions before sending data.

C. Send user data over HTTP with a simple password in the URL.

D. Use HTTP and require no authentication for faster access.

Solution

1. Step 1: Identify secure transport and authentication

   HTTPS encrypts data in transit, API tokens verify caller identity, and permission checks protect privacy.

2. Step 2: Compare options for best security practice

   Use HTTPS, require API tokens, and validate user permissions before sending data. combines encryption, authentication, and authorization, which is the best approach. Others are insecure or incomplete.

3. Final Answer:

   Use HTTPS, require API tokens, and validate user permissions before sending data. -> Option B

4. Quick Check:

   HTTPS + tokens + permissions = secure API [OK]

Hint: Combine HTTPS, tokens, and permission checks [OK]

Common Mistakes:

• Ignoring encryption with HTTP
• Skipping authentication
• Not checking user permissions