You want to add middleware that logs request paths and modifies the response to add a custom header. Which approach correctly extends functionality using middleware?

hard📝 Application Q15 of 15

Flask - Middleware and Extensions

AModify the Flask app routes to log and add headers directly inside each route function

BUse middleware that only logs requests but does not call the app

Create middleware that logs <code>environ['PATH_INFO']</code>, calls the app, then adds header to response before returning

DAdd a middleware that replaces the response with a fixed string ignoring the app

Step-by-Step Solution

Solution:

Step 1: Understand middleware responsibilities
Middleware should handle logging before calling the app and modify the response after.
Step 2: Evaluate options
Create middleware that logs environ['PATH_INFO'], calls the app, then adds header to response before returning correctly logs the request path, calls the app, then modifies the response headers. Others either bypass app or do tasks incorrectly.
Final Answer:
Create middleware that logs environ['PATH_INFO'], calls the app, then adds header to response before returning -> Option C
Quick Check:
Middleware logs and modifies response = B [OK]

Quick Trick: Middleware wraps app: log before, modify response after [OK]

Common Mistakes:

MISTAKES

Modifying routes instead of middleware
Not calling the wrapped app
Replacing response ignoring app output

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You want to add middleware that logs request paths and modifies the response to add a custom header. Which approach correctly extends functionality using middleware?

Step 1: Understand middleware responsibilities

Step 2: Evaluate options

Final Answer:

Quick Check:

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