[middleware] add lib/acl_middleware
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#!/usr/bin/env python3
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from starlette.requests import Request
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from starlette.exceptions import HTTPException
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@app.middleware('http')
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async def acl_middleware(request: Request, call_next):
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""" Checks the "acls" key in the scope and applies the
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corresponding functions in the current module's acl lib.
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Raises an exception if no acl function returns True
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"""
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print(f'Hit acl {__name__} middleware')
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for acl_fnct_name in request.scope['acls']:
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print(f'Will apply {acl_fnct_name}')
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try:
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fct = getattr(acl, acl_fct_name)
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if fct(request) is True:
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print(f'{fct} : {fct(request)}\n')
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return await call_next(request)
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except AttributeError as e:
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print(f'No ACL function "{acl_fct_name}" in {__name__} module')
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print(e)
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break
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except Exception as e:
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print(e)
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raise HTTPException(500)
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raise HTTPException(401)
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