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300-435 · Question #159

Refer to the exhibit. Which code snippet must be added to the box in the code to complete the webhook receiver function?

The correct answer is B. `@app.route('/webhook', methods=['POST']) @basic_auth.required def webhook(): if request.method == 'POST': print('Webhook Received') request_json = request.json`. A valid Flask webhook receiver requires a route decorator, an auth decorator, and a properly defined Python function using the def keyword.

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Question

Refer to the exhibit. Which code snippet must be added to the box in the code to complete the webhook receiver function?

Options

  • A@app.route('/webhook', methods=['POST']) @basic_auth.required if request.method == 'POST': print('Webhook Received') request_json = request.json
  • B@app.route('/webhook', methods=['POST']) @basic_auth.required def webhook(): if request.method == 'POST': print('Webhook Received') request_json = request.json
  • C@app.route('/webhook', methods=['PUT']) @basic_auth.required import webhook() if request.method == 'POST': print('Webhook Received') request_json = request.json
  • D@app.route('/webhook', methods=['PUT']) @basic_auth.required class webhook(): if request.method == 'POST': print('Webhook Received') request_json = request.json

How the community answered

(24 responses)
  • B
    88% (21)
  • C
    8% (2)
  • D
    4% (1)

Why each option

A valid Flask webhook receiver requires a route decorator, an auth decorator, and a properly defined Python function using the def keyword.

A`@app.route('/webhook', methods=['POST']) @basic_auth.required if request.method == 'POST': print('Webhook Received') request_json = request.json`

This option is missing the def webhook(): function definition line - without it the indented code block has no function to belong to, making it a syntax error.

B`@app.route('/webhook', methods=['POST']) @basic_auth.required def webhook(): if request.method == 'POST': print('Webhook Received') request_json = request.json`Correct

Option B correctly defines a Flask route using @app.route('/webhook', methods=['POST']), applies basic auth protection with @basic_auth.required, and then defines a proper Python function with def webhook():. The function body then checks the request method and parses the incoming JSON payload. All three elements - route decorator, auth decorator, and function definition - are required for a functional Flask endpoint.

C`@app.route('/webhook', methods=['PUT']) @basic_auth.required import webhook() if request.method == 'POST': print('Webhook Received') request_json = request.json`

Using methods=['PUT'] instead of POST is incorrect for a webhook receiver, and import webhook() is invalid Python syntax - you cannot import a function with parentheses.

D`@app.route('/webhook', methods=['PUT']) @basic_auth.required class webhook(): if request.method == 'POST': print('Webhook Received') request_json = request.json`

methods=['PUT'] is wrong for a webhook that expects POST requests, and using class webhook(): defines a class instead of a function, which is incorrect for a Flask route handler.

Concept tested: Flask webhook route and function definition syntax

Source: https://flask.palletsprojects.com/en/stable/api/#flask.Flask.route

Topics

#Flask#Webhooks#Python#API Programming

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