[Solved] Examine this middleware code snippet and identify the issue:class TimingMiddleware(BaseHTTPMiddleware): def dispatch(self, request, call_next): start = time.... | FastAPI

FastAPI - Middleware and Hooks

Examine this middleware code snippet and identify the issue:

class TimingMiddleware(BaseHTTPMiddleware):
    def dispatch(self, request, call_next):
        start = time.time()
        response = await call_next(request)
        process_time = time.time() - start
        response.headers['X-Process-Time'] = str(process_time)
        return response

AThe dispatch method must be declared async to use await

BThe response headers cannot be modified inside middleware

Ccall_next should not be awaited in dispatch

Dtime module cannot be used inside middleware

Step-by-Step Solution

Solution:

Step 1: Check method signature
Since dispatch uses await, it must be declared async.
Step 2: Validate other statements
Modifying response headers is allowed; call_next must be awaited; time module usage is valid.
Final Answer:
The dispatch method must be declared async to use await -> Option A
Quick Check:
Async required when using await [OK]

Quick Trick: Use async def when awaiting inside dispatch [OK]

Common Mistakes:

MISTAKES

Forgetting to declare dispatch as async
Assuming response headers are immutable
Not awaiting call_next leading to errors

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Examine this middleware code snippet and identify the issue:

Step 1: Check method signature

Step 2: Validate other statements

Final Answer:

Quick Check:

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