o
    uvXjº  ã                   @   sl   d dl Z d dlmZmZmZ d dlmZ d dlmZm	Z	m
Z
mZ d dlmZ d dlmZ G dd„ deƒZdS )	é    N)ÚCreateErrorÚSessionBaseÚUpdateError)ÚSuspiciousOperation)ÚDatabaseErrorÚIntegrityErrorÚrouterÚtransaction)Útimezone)Úcached_propertyc                       s‚   e Zd ZdZd‡ fdd„	Zedd„ ƒZedd„ ƒZd	d
„ Z	dd„ Z
dd„ Zdd„ Zdd„ Zddd„Zddd„Zedd„ ƒZ‡  ZS )ÚSessionStorez+
    Implement database session store.
    Nc                    s   t ƒ  |¡ d S ©N)ÚsuperÚ__init__©ÚselfÚsession_key©Ú	__class__© ú`/var/www/html/myproject/venv/lib/python3.10/site-packages/django/contrib/sessions/backends/db.pyr      s   zSessionStore.__init__c                 C   s   ddl m} |S )Nr   )ÚSession)Údjango.contrib.sessions.modelsr   )Úclsr   r   r   r   Úget_model_class   s   zSessionStore.get_model_classc                 C   s   |   ¡ S r   )r   ©r   r   r   r   Úmodel   s   zSessionStore.modelc              
   C   sz   z| j jj| jt ¡ d�W S  | j jtfy< } zt|tƒr.t	 
d|jj ¡}| t|ƒ¡ d | _W Y d }~d S d }~ww )N)r   Úexpire_date__gtzdjango.security.%s)r   ÚobjectsÚgetr   r
   ÚnowÚDoesNotExistr   Ú
isinstanceÚloggingÚ	getLoggerr   Ú__name__ÚwarningÚstrÚ_session_key)r   ÚeÚloggerr   r   r   Ú_get_session_from_db   s   þ
€üz!SessionStore._get_session_from_dbc                 C   s   |   ¡ }|r|  |j¡S i S r   )r+   ÚdecodeÚsession_data)r   Úsr   r   r   Úload*   s   zSessionStore.loadc                 C   s   | j jj|d� ¡ S ©N)r   )r   r   ÚfilterÚexistsr   r   r   r   r2   .   s   zSessionStore.existsc                 C   s:   	 |   ¡ | _z| jdd� W n	 ty   Y q w d| _d S )NT)Úmust_create)Ú_get_new_session_keyr(   Úsaver   Úmodifiedr   r   r   r   Úcreate1   s   
þzSessionStore.createc                 C   s   | j |  ¡ |  |¡|  ¡ d�S )zÁ
        Return a new instance of the session model object, which represents the
        current session state. Intended to be used for saving the session data
        to the database.
        )r   r-   Úexpire_date)r   Ú_get_or_create_session_keyÚencodeÚget_expiry_date)r   Údatar   r   r   Úcreate_model_instance>   s
   ýz"SessionStore.create_model_instanceFc                 C   s°   | j du r	|  ¡ S | j|d�}|  |¡}tj| j|d�}z$tj|d�� |j	|| |d� W d  ƒ W dS 1 s9w   Y  W dS  t
yL   |rKt‚‚  tyW   |sVt‚‚ w )zé
        Save the current session data to the database. If 'must_create' is
        True, raise a database error if the saving operation doesn't create a
        new entry (as opposed to possibly updating an existing entry).
        N)Úno_load)Úinstance)Úusing)Úforce_insertÚforce_updater@   )r   r7   Ú_get_sessionr=   r   Údb_for_writer   r	   Úatomicr5   r   r   r   r   )r   r3   r<   Úobjr@   r   r   r   r5   J   s$   

&ÿýzSessionStore.savec                 C   sP   |d u r| j d u rd S | j }z| jjj|d� ¡  W d S  | jjy'   Y d S w r0   )r   r   r   r   Údeleter!   r   r   r   r   rG   a   s   
ÿzSessionStore.deletec                 C   s   |   ¡ jjt ¡ d� ¡  d S )N)Úexpire_date__lt)r   r   r1   r
   r    rG   )r   r   r   r   Úclear_expiredk   s   zSessionStore.clear_expiredr   )F)r%   Ú
__module__Ú__qualname__Ú__doc__r   Úclassmethodr   r   r   r+   r/   r2   r7   r=   r5   rG   rI   Ú__classcell__r   r   r   r   r      s     




r   )r#   Ú%django.contrib.sessions.backends.baser   r   r   Údjango.core.exceptionsr   Ú	django.dbr   r   r   r	   Údjango.utilsr
   Údjango.utils.functionalr   r   r   r   r   r   Ú<module>   s    