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058d76f5ff
Also move a couple of comments inside the functions they describe, because they're about the implementation of the functions rather than their interface.
47 lines
1.7 KiB
Python
47 lines
1.7 KiB
Python
from __future__ import absolute_import
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from django.conf import settings
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from typing import Text
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from zerver.lib.utils import make_safe_digest
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if False:
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# Typing import inside `if False` to avoid import loop.
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from zerver.models import UserProfile
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import hashlib
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def gravatar_hash(email):
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# type: (Text) -> Text
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"""Compute the Gravatar hash for an email address."""
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# Non-ASCII characters aren't permitted by the currently active e-mail
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# RFCs. However, the IETF has published https://tools.ietf.org/html/rfc4952,
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# outlining internationalization of email addresses, and regardless if we
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# typo an address or someone manages to give us a non-ASCII address, let's
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# not error out on it.
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return make_safe_digest(email.lower(), hashlib.md5)
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def user_avatar_hash(uid):
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# type: (Text) -> Text
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# WARNING: If this method is changed, you may need to do a migration
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# similar to zerver/migrations/0060_move_avatars_to_be_uid_based.py .
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# The salt probably doesn't serve any purpose now. In the past we
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# used a hash of the email address, not the user ID, and we salted
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# it in order to make the hashing scheme different from Gravatar's.
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user_key = uid + settings.AVATAR_SALT
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return make_safe_digest(user_key, hashlib.sha1)
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def user_avatar_path(user_profile):
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# type: (UserProfile) -> Text
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# WARNING: If this method is changed, you may need to do a migration
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# similar to zerver/migrations/0060_move_avatars_to_be_uid_based.py .
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return user_avatar_path_from_ids(user_profile.id, user_profile.realm_id)
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def user_avatar_path_from_ids(user_profile_id, realm_id):
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# type: (int, int) -> Text
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user_id_hash = user_avatar_hash(str(user_profile_id))
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return '%s/%s' % (str(realm_id), user_id_hash)
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