Flask - Middleware and Extensions
Which is the correct way to define a middleware class in Flask?
Which is the correct way to define a middleware class in Flask?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Recall middleware structure
Middleware in Flask is a callable class that wraps the WSGI app.Step 2: Match correct syntax
The class must implement __init__ to accept app and __call__ to handle requests.Final Answer:
class MyMiddleware: def __init__(self, app): self.app = app def __call__(self, environ, start_response): return self.app(environ, start_response) -> Option CQuick Check:
Middleware class = __init__ + __call__ methods [OK]
Quick Trick: Middleware class must be callable with __call__ method [OK]
Common Mistakes:
MISTAKES- Defining middleware as a simple function without __call__
- Missing __init__ to store app reference
- Assigning middleware directly to app.middleware attribute
Master "Middleware and Extensions" in Flask
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