JWT token propagation in Microservices - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to extract the JWT token from the HTTP Authorization header.

Microservices

auth_header = request.headers.get('Authorization')
token = auth_header.split(' ')[[1]]

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

A1

B2

C0

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Using index 0 returns 'Bearer' instead of the token.

Using -1 might work but is less clear.

The Authorization header usually has the format 'Bearer <token>'. Splitting by space, the token is at index 1.

2fill in blank

medium

Complete the code to add the JWT token to the outgoing HTTP request headers for propagation.

Microservices

headers = {}
headers['Authorization'] = 'Bearer ' + [1]

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

Aauth_token

Btoken

Caccess_token

Djwt_token

Attempts:

3 left

💡 Hint

Common Mistakes

Using undefined variable names like 'auth_token' or 'jwt_token' without declaration.

The variable holding the JWT token is commonly named 'token' in this context.

3fill in blank

hard

Fix the error in the code that forwards the JWT token in a microservice call.

Microservices

response = requests.get(url, headers=[1])

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Aauth_header

BAuthorization

Cheader

Dheaders

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a string instead of a dictionary causes runtime errors.

Using wrong variable names leads to NameError.

The requests library expects a dictionary named 'headers' for HTTP headers, not a single string or incorrect variable.

4fill in blank

hard

Fill both blanks to correctly extract and propagate the JWT token in a microservice environment.

Microservices

auth_header = request.headers.get('[1]')
token = auth_header.split(' ')[[2]]

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

AAuthorization

BAuthentication

C0

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Authentication' instead of 'Authorization' header.

Using index 0 returns the word 'Bearer' instead of the token.

The HTTP header for JWT tokens is 'Authorization'. The token is the second part after splitting by space, so index 1.

5fill in blank

hard

Fill all three blanks to create a dictionary that propagates the JWT token only if it exists and is valid.

Microservices

if [1] and [2].startswith('Bearer '):
    headers = {'Authorization': [3]
else:
    headers = {}

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

Aauth_header

Dauth_header.split(' ')[1]

Attempts:

3 left

💡 Hint

Common Mistakes

Not checking if the header exists before accessing it.

Using the whole header string instead of just the token.

First, check if 'auth_header' exists and starts with 'Bearer '. Then extract the token part by splitting and use it in the headers.