[Solved] Identify the error in this Flask code that tries to add a Strict-Transport-Security header:from flask import Flask app = Flask(__name__) @app.after_request def secure_headers(response): response.... | Flask

Flask - Security Best Practices

Identify the error in this Flask code that tries to add a Strict-Transport-Security header:

from flask import Flask
app = Flask(__name__)

@app.after_request
def secure_headers(response):
    response.headers['Strict-Transport-Security'] = 'max-age=31536000; includeSubDomains'
    return response

@app.route('/')
def index():
    return 'Welcome'

AThe header name should be lowercase

BNo error; the code is correct

CThe header value string is missing quotes

DThe function must accept two parameters

Step-by-Step Solution

Solution:

Step 1: Review header name and value syntax
Header names are case-insensitive; using 'Strict-Transport-Security' is valid. The value is a valid string with quotes.
Step 2: Check function signature and usage
@app.after_request functions take one parameter (response) and return it. This matches the code.
Final Answer:
No error; the code is correct -> Option B
Quick Check:
Header added correctly in @app.after_request [OK]

Quick Trick: Check function signature and header syntax carefully [OK]

Common Mistakes:

MISTAKES

Thinking header names must be lowercase
Expecting two parameters in after_request function
Missing quotes around header value string

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More Flask Quizzes

Identify the error in this Flask code that tries to add a Strict-Transport-Security header:

Step 1: Review header name and value syntax

Step 2: Check function signature and usage

Final Answer:

Quick Check:

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