U
    ü‚ºe¿
  ã                   @   sF   d dl mZmZ d dlmZ d dlmZ d dlmZ G dd„ dƒZ	dS )é    )ÚImproperlyConfiguredÚSuspiciousFileOperation)Úget_app_template_dirs)Ú	safe_join)Úcached_propertyc                   @   sD   e Zd Zdd„ Zedd„ ƒZdd„ Zdd„ Zed	d
„ ƒZ	dd„ Z
dS )Ú
BaseEnginec                 C   sL   |  ¡ }| d¡| _t| d¡ƒ| _| d¡| _|rHtd d |¡¡ƒ‚dS )zh
        Initialize the template engine.

        `params` is a dict of configuration settings.
        ÚNAMEZDIRSZAPP_DIRSzUnknown parameters: {}z, N)	ÚcopyÚpopÚnameÚlistÚdirsÚapp_dirsr   ÚformatÚjoin)ÚselfÚparams© r   úA/tmp/pip-unpacked-wheel-lctamlir/django/template/backends/base.pyÚ__init__   s    ÿzBaseEngine.__init__c                 C   s   t d | jj¡ƒ‚d S )NzA{} doesn't support loading templates from installed applications.)r   r   Ú	__class__Ú__name__)r   r   r   r   Úapp_dirname   s
    ÿÿzBaseEngine.app_dirnamec                 C   s   t dƒ‚dS )zk
        Create and return a template for the given source code.

        This method is optional.
        z>subclasses of BaseEngine should provide a from_string() methodN©ÚNotImplementedError)r   Ztemplate_coder   r   r   Úfrom_string!   s    ÿzBaseEngine.from_stringc                 C   s   t dƒ‚dS )z€
        Load and return a template for the given name.

        Raise TemplateDoesNotExist if no such template exists.
        z=subclasses of BaseEngine must provide a get_template() methodNr   )r   Útemplate_namer   r   r   Úget_template+   s    ÿzBaseEngine.get_templatec                 C   s"   t | jƒ}| jr|t| jƒ7 }|S )zG
        Return a list of directories to search for templates.
        )Útupler   r   r   r   )r   Útemplate_dirsr   r   r   r   8   s    
zBaseEngine.template_dirsc              	   c   s6   | j D ]*}zt||ƒV  W q tk
r.   Y qX qdS )z´
        Iterate over candidate files for template_name.

        Ignore files that don't lie inside configured template dirs to avoid
        directory traversal attacks.
        N)r   r   r   )r   r   Ztemplate_dirr   r   r   Úiter_template_filenamesC   s
    
z"BaseEngine.iter_template_filenamesN)r   Ú
__module__Ú__qualname__r   Úpropertyr   r   r   r   r   r    r   r   r   r   r      s   



r   N)
Zdjango.core.exceptionsr   r   Zdjango.template.utilsr   Zdjango.utils._osr   Zdjango.utils.functionalr   r   r   r   r   r   Ú<module>   s   