Basic authentication in Rest API - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add the Authorization header for Basic authentication.

Rest API

headers = {"Authorization": "Basic [1]"}

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Ab64encode(b'user:pass').decode('utf-8')

Bbase64.encode('user:pass')

Cbase64.b64decode('user:pass')

Db64encode('user:pass')

Attempts:

3 left

💡 Hint

Common Mistakes

Encoding the string directly without converting to bytes.

Using base64 decode instead of encode.

Not decoding the base64 bytes back to string.

The Authorization header for Basic authentication requires the username and password encoded in base64 as a UTF-8 string.

2fill in blank

medium

Complete the code to create the Basic authentication header value correctly.

Rest API

auth_value = "Basic " + [1]

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Abase64.b64encode('username:password')

Bbase64.b64encode(b'username:password').decode('utf-8')

Cbase64.b64decode(b'username:password').decode('utf-8')

Dbase64.encode('username:password')

Attempts:

3 left

💡 Hint

Common Mistakes

Encoding a string directly without converting to bytes.

Using decode before encoding.

Using base64 decode instead of encode.

The credentials must be base64 encoded from bytes and then decoded to a UTF-8 string before adding to the header.

3fill in blank

hard

Fix the error in the code to correctly set the Basic authentication header.

Rest API

import base64
credentials = 'admin:1234'
encoded = base64.b64encode([1])
headers = {'Authorization': 'Basic ' + encoded.decode('utf-8')}

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Abase64.b64decode(credentials)

Bcredentials

Cencoded

Dcredentials.encode('utf-8')

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a string directly to b64encode causing a TypeError.

Using base64 decode instead of encode.

Trying to encode the already encoded variable.

The string credentials must be converted to bytes before base64 encoding.

4fill in blank

hard

Fill both blanks to create a Basic authentication header with username and password.

Rest API

import base64
user = 'user1'
passw = 'pass1'
creds = f"[1]:[2]"
encoded = base64.b64encode(creds.encode('utf-8')).decode('utf-8')
headers = {'Authorization': 'Basic ' + encoded}

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Auser

Bpassw

Cusername

Dpassword

Attempts:

3 left

💡 Hint

Common Mistakes

Using undefined variable names.

Swapping username and password variables.

Forgetting the colon separator.

The credentials string must be username and password joined by a colon.

5fill in blank

hard

Fill all three blanks to build a Basic authentication header from variables and encode it properly.

Rest API

import base64
username = 'alice'
password = 'wonderland'
credentials = f"[1]:[2]"
encoded_credentials = base64.b64encode(credentials.encode('utf-8')).decode([3])
headers = {'Authorization': 'Basic ' + encoded_credentials}

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Ausername

Bpassword

C'utf-8'

D'ascii'

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names.

Decoding with 'ascii' which may cause errors.

Not joining username and password with a colon.

The credentials string is username and password joined by a colon. The encoded bytes are decoded using 'utf-8' to get a string for the header.