39 lines
1.4 KiB
Python
39 lines
1.4 KiB
Python
from multiprocessing.sharedctypes import Array
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from util.validation import MAX_USERNAME_LENGTH
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class SuperUserManager(object):
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""" In-memory helper class for quickly accessing (and updating) the valid
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set of super users. This class communicates across processes to ensure
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that the shared set is always the same.
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"""
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def __init__(self, app):
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usernames = app.config.get('SUPER_USERS', [])
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usernames_str = ','.join(usernames)
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self._max_length = len(usernames_str) + MAX_USERNAME_LENGTH + 1
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self._array = Array('c', self._max_length, lock=True)
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self._array.value = usernames_str
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def is_superuser(self, username):
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""" Returns if the given username represents a super user. """
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usernames = self._array.value.split(',')
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return username in usernames
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def register_superuser(self, username):
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""" Registers a new username as a super user for the duration of the container.
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Note that this does *not* change any underlying config files.
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"""
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usernames = self._array.value.split(',')
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usernames.append(username)
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new_string = ','.join(usernames)
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if len(new_string) <= self._max_length:
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self._array.value = new_string
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else:
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raise Exception('Maximum superuser count reached. Please report this to support.')
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def has_superusers(self):
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""" Returns whether there are any superusers defined. """
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return bool(self._array.value)
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