Content negotiation in Rest API - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the response content type to JSON.

Rest API

response.headers['Content-Type'] = '[1]'

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

Atext/html

Btext/plain

Capplication/json

Dapplication/xml

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'text/html' instead of 'application/json' for JSON responses.

Forgetting to set the Content-Type header.

The Content-Type header tells the client the format of the response. For JSON, it should be application/json.

2fill in blank

medium

Complete the code to check if the client accepts JSON responses.

Rest API

if 'application/json' in request.headers.get('[1]', ''):

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

AContent-Type

BAccept

CAuthorization

DUser-Agent

Attempts:

3 left

💡 Hint

Common Mistakes

Checking 'Content-Type' header instead of 'Accept'.

Not handling the case when the header is missing.

The Accept header tells the server what content types the client can handle. Checking it for 'application/json' helps decide the response format.

3fill in blank

hard

Fix the error in the code to correctly parse the client's preferred content type.

Rest API

preferred = request.headers.get('Accept', '').split(',')[[1]].strip()

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

A2

B1

C-1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using index 1 instead of 0, causing an error if only one type is present.

Using negative index which may not be intended here.

The first item in the 'Accept' header list is at index 0. Using 0 gets the primary preferred content type.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps content types to their quality values from the Accept header.

Rest API

qualities = {ctype: float(q.split('=')[1]) if 'q=' in q else 1.0 for ctype, q in (item.split(';')[1] for item in request.headers.get('Accept', '').split(',')) if ctype [2] ''}

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

A if len(item.split(';')) > 1 else ''

B!=

C==

D else None

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of '!=' in the filter condition.

Not handling items without quality values properly.

The first blank checks if the split has a quality value part; if not, it uses an empty string. The second blank filters out empty content types.

5fill in blank

hard

Fill all three blanks to return the best matching content type from the server's supported types based on client's Accept header.

Rest API

def best_match(supported_types):
    qualities = {ctype: float(q.split('=')[1]) if 'q=' in q else 1.0 for ctype, q in (item.split(';')[1] for item in request.headers.get('Accept', '').split(',')) if ctype [2] ''}
    best = max(supported_types, key=lambda t: qualities.get(t, [3]))
    return best

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

A if len(item.split(';')) > 1 else ''

B!=

C0

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of '!=' in the filter.

Using None or other values instead of 0 as default quality.

The first blank handles quality parsing, the second filters out empty types, and the third provides a default quality of 0 for unsupported types.