server/auth: add token authentication

* Users are only authenticated against their password on login,
  and to retrieve a token
* Passwords are wiped from the GUI frontend and cookies
  after login and token retrieval
* Tokens are revoked at the end of the session/logout
* If the user chooses the "remember me" option,
  the token is stored in the cookie
* Tokens correctly delete themselves on logout
* Tokens can expire at user-specified date
* Tokens have their last usage time
* Tokens can have user defined descriptions
* Users can manage login tokens in their account settings

1 files changed, 6 insertions, 0 deletions

diff --git a/server/szurubooru/func/util.py b/server/szurubooru/func/util.py
index ba2d4dc..5e82286 100644
--- a/server/szurubooru/func/util.py
+++ b/server/szurubooru/func/util.py
@@ -160,6 +160,12 @@ def value_exceeds_column_size(value: Optional[str], column: Any) -> bool:
     return len(value) > max_length
 
 
+def get_column_size(column: Any) -> Optional[int]:
+    if not column:
+        return None
+    return column.property.columns[0].type.length
+
+
 def chunks(source_list: List[Any], part_size: int) -> Generator:
     for i in range(0, len(source_list), part_size):
         yield source_list[i:i + part_size]