38 lines
1.1 KiB
Python
38 lines
1.1 KiB
Python
"""Internal utility functions used by authens."""
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from urllib.parse import urlunparse
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from cas import CASClient
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def get_cas_client(request):
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"""Return a CAS client configured for SPI's CAS."""
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return CASClient(
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version=3,
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service_url=urlunparse(
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(request.scheme, request.get_host(), request.path, "", "", "")
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),
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server_url="https://cas.eleves.ens.fr/",
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)
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def parse_entrance_year(home_dir):
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"""Infer the entrance year of a CAS account from their home directory."""
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# The home directory of a user is of the form /users/YEAR/DEPARTMENT/CAS_LOGIN where
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# YEAR is a 2-digit number representing the entrance year of the student. We get the
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# entrance year from there.
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if home_dir is None:
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return None
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dirs = home_dir.split("/")
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if len(dirs) < 3 or not dirs[2].isdecimal() or dirs[1] != "users":
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raise ValueError("Invalid home directory: {}".format(home_dir))
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# Expand the 2-digit entrance year into 4 digits.
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# This will break in 2080.
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year = int(dirs[2])
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if year >= 80:
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return 1900 + year
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else:
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return 2000 + year
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