U
    8ÄT_™
  ã                   @   sD   d dl mZ d dlmZmZmZ d dlmZ dZG dd„ deƒZ	dS )é    )Úsettings)ÚCreateErrorÚSessionBaseÚUpdateError)Úcacheszdjango.contrib.sessions.cachec                       sj   e Zd ZdZeZd‡ fdd„	Zedd„ ƒZdd„ Z	d	d
„ Z
ddd„Zdd„ Zddd„Zedd„ ƒZ‡  ZS )ÚSessionStorez&
    A cache-based session store.
    Nc                    s   t tj | _tƒ  |¡ d S ©N)r   r   ZSESSION_CACHE_ALIASÚ_cacheÚsuperÚ__init__©ÚselfÚsession_key©Ú	__class__© úJ/tmp/pip-unpacked-wheel-dv63caxw/django/contrib/sessions/backends/cache.pyr      s    zSessionStore.__init__c                 C   s   | j |  ¡  S r   )Úcache_key_prefixZ_get_or_create_session_key)r   r   r   r   Ú	cache_key   s    zSessionStore.cache_keyc                 C   sB   z| j  | j¡}W n tk
r*   d }Y nX |d k	r8|S d | _i S r   )r	   Úgetr   Ú	ExceptionÚ_session_key)r   Zsession_datar   r   r   Úload   s    
zSessionStore.loadc              	   C   sX   t dƒD ]B}|  ¡ | _z| jdd� W n tk
r>   Y qY nX d| _ d S tdƒ‚d S )Ni'  T)Úmust_createzOUnable to create a new session key. It is likely that the cache is unavailable.)ÚrangeZ_get_new_session_keyr   Úsaver   ÚmodifiedÚRuntimeError)r   Úir   r   r   Úcreate$   s    

ÿzSessionStore.createFc                 C   sj   | j d kr|  ¡ S |r | jj}n | j | j¡d k	r<| jj}nt‚|| j| j|d�|  	¡ ƒ}|rf|sft
‚d S )N)Zno_load)r   r   r	   Úaddr   r   Úsetr   Z_get_sessionZget_expiry_ager   )r   r   ÚfuncÚresultr   r   r   r   6   s    



þzSessionStore.savec                 C   s   t |ƒo| j| | jkS r   )Úboolr   r	   r   r   r   r   ÚexistsE   s    zSessionStore.existsc                 C   s2   |d kr| j d krd S | j }| j | j| ¡ d S r   )r   r	   Údeleter   r   r   r   r   r&   H   s
    
zSessionStore.deletec                 C   s   d S r   r   )Úclsr   r   r   Úclear_expiredO   s    zSessionStore.clear_expired)N)F)N)Ú__name__Ú
__module__Ú__qualname__Ú__doc__Ú
KEY_PREFIXr   r   Úpropertyr   r   r   r   r%   r&   Úclassmethodr(   Ú__classcell__r   r   r   r   r   
   s   


r   N)
Zdjango.confr   Z%django.contrib.sessions.backends.baser   r   r   Zdjango.core.cacher   r-   r   r   r   r   r   Ú<module>   s   