40 lines
1.4 KiB
Markdown
40 lines
1.4 KiB
Markdown
# Handler Decorators
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Since Sanic handlers are simple Python functions, you can apply decorators to them in a similar manner to Flask. A typical use case is when you want some code to run before a handler's code is executed.
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## Authorization Decorator
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Let's say you want to check that a user is authorized to access a particular endpoint. You can create a decorator that wraps a handler function, checks a request if the client is authorized to access a resource, and sends the appropriate response.
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```python
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from functools import wraps
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from sanic.response import json
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def authorized():
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def decorator(f):
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@wraps(f)
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async def decorated_function(request, *args, **kwargs):
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# run some method that checks the request
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# for the client's authorization status
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is_authorized = check_request_for_authorization_status(request)
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if is_authorized:
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# the user is authorized.
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# run the handler method and return the response
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response = await f(request, *args, **kwargs)
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return response
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else:
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# the user is not authorized.
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return json({'status': 'not_authorized'}, 403)
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return decorated_function
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return decorator
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@app.route("/")
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@authorized()
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async def test(request):
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return json({'status': 'authorized'})
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```
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