/usr/local/lib/python3.9/site-packages/django/core/cache/backends/__pycache__
a Ӱ�h�7 � @ s� d Z ddlZddlZddlmZ ddlmZ ddlmZ G dd� de�Z G dd � d e �Z G d d � d e �Z e� Zd Zd d� Zdd� ZG dd� d�Zdd� ZdS )zBase Cache class.� N)� sync_to_async)�ImproperlyConfigured)� import_stringc @ s e Zd ZdS )�InvalidCacheBackendErrorN��__name__� __module__� __qualname__� r r �I/usr/local/lib/python3.9/site-packages/django/core/cache/backends/base.pyr s r c @ s e Zd ZdS )�CacheKeyWarningNr r r r r r s r c @ s e Zd ZdS )�InvalidCacheKeyNr r r r r r s r � c C s d||| f S )z� Default function to generate keys. Construct the key used by all other methods. By default, prepend the `key_prefix`. KEY_FUNCTION can be used to specify an alternate function with custom key making behavior. z%s:%s:%sr )�key� key_prefix�versionr r r �default_key_func s r c C s | dur t | �r| S t| �S tS )z] Function to decide which key function to use. Default to ``default_key_func``. N)�callabler r )�key_funcr r r � get_key_func* s r c @ s� e Zd Ze� Zdd� Zefdd�ZdOdd�Zdd � Z dPd d �Z edfd d �Z edfdd�Z dQdd�Z dRdd�Zedfdd�Zedfdd�Zedfdd�Zedfdd�ZdSd d �ZdTd d �ZdUd d!�ZdVd"d#�Zedfd$d%�Zedfd&d'�ZdWd(d)�ZdXd*d+�ZdYd-d.�ZdZd/d0�Z d[d1d2�Z d\d3d4�Z d5d6� Z edfd7d8�Z edfd9d:�Z!d]d;d<�Z"d^d=d>�Z#d?d@� Z$dAdB� Z%d_dCdD�Z&d`dEdF�Z'dadGdH�Z(dbdIdJ�Z)dKdL� Z*dMdN� Z+dS )c� BaseCachec C s |� d|� dd��}|d urDz t|�}W n ttfyB d}Y n0 || _|� di �}|� d|� dd��}zt|�| _W n ttfy� d| _Y n0 |� d|� dd ��}zt|�| _W n ttfy� d | _Y n0 |� d d �| _|� d d �| _t |� d��| _ d S )N�timeout�TIMEOUTi, �OPTIONS� max_entriesZ MAX_ENTRIES�cull_frequencyZCULL_FREQUENCY� Z KEY_PREFIX� �VERSION� Z KEY_FUNCTION) �get�int� ValueError� TypeError�default_timeoutZ _max_entriesZ_cull_frequencyr r r r )�self�paramsr �optionsr r r r r �__init__; s* zBaseCache.__init__c C s4 |t kr| j}n |dkr d}|du r(dS t�� | S )zj Return the timeout value usable by this backend based upon the provided timeout. r ���N)�DEFAULT_TIMEOUTr$ �time)r% r r r r �get_backend_timeoutU s z BaseCache.get_backend_timeoutNc C s |du r| j }| �|| j|�S )ap Construct the key used by all other methods. By default, use the key_func to generate a key (which, by default, prepends the `key_prefix' and 'version'). A different key function can be provided at the time of cache construction; alternatively, you can subclass the cache backend to provide custom key making behavior. N)r r r �r% r r r r r �make_keya s zBaseCache.make_keyc C s t |�D ]}t�|t� qdS )z� Warn about keys that would not be portable to the memcached backend. This encourages (but does not force) writing backend-portable cache code. N)�memcache_key_warnings�warnings�warnr )r% r �warningr r r � validate_keyn s zBaseCache.validate_keyc C s | j ||d�}| �|� |S )z!Helper to make and validate keys.�r )r. r3 r- r r r �make_and_validate_keyw s z BaseCache.make_and_validate_keyc C s t d��dS )z� Set a value in the cache if the key does not already exist. If timeout is given, use that timeout for the key; otherwise use the default cache timeout. Return True if the value was stored, False otherwise. z4subclasses of BaseCache must provide an add() methodN��NotImplementedError�r% r �valuer r r r r �add} s �z BaseCache.addc � s t | jdd�||||�I d H S �NT)Zthread_sensitive)r r: r8 r r r �aadd� s �zBaseCache.aaddc C s t d��dS )z� Fetch a given key from the cache. If the key does not exist, return default, which itself defaults to None. z3subclasses of BaseCache must provide a get() methodNr6 �r% r �defaultr r r r r � s z BaseCache.getc � s t | jdd�|||�I d H S r; )r r r= r r r �aget� s �zBaseCache.agetc C s t d��dS )z� Set a value in the cache. If timeout is given, use that timeout for the key; otherwise use the default cache timeout. z3subclasses of BaseCache must provide a set() methodNr6 r8 r r r �set� s z BaseCache.setc � s t | jdd�||||�I d H S r; )r r@ r8 r r r �aset� s �zBaseCache.asetc C s t d��dS )z� Update the key's expiry time using timeout. Return True if successful or False if the key does not exist. z5subclasses of BaseCache must provide a touch() methodNr6 �r% r r r r r r �touch� s �zBaseCache.touchc � s t | jdd�|||�I d H S r; )r rC rB r r r �atouch� s �zBaseCache.atouchc C s t d��dS )zh Delete a key from the cache and return whether it succeeded, failing silently. z6subclasses of BaseCache must provide a delete() methodNr6 r- r r r �delete� s �zBaseCache.deletec � s t | jdd�||�I d H S r; )r rE r- r r r �adelete� s zBaseCache.adeletec C s6 i }|D ](}| j || j|d�}|| jur|||< q|S )a. Fetch a bunch of keys from the cache. For certain backends (memcached, pgsql) this can be *much* faster when fetching multiple values. Return a dict mapping each key in keys to its value. If the given key is missing, it will be missing from the response dict. r4 �r � _missing_key�r% �keysr �d�k�valr r r �get_many� s zBaseCache.get_manyc � s< i }|D ].}| j || j|d�I dH }|| jur|||< q|S )zSee get_many().r4 N�r? rH rI r r r � aget_many� s zBaseCache.aget_manyc C sP | j || j|d�}|| ju rLt|�r*|� }| j||||d� | j |||d�S |S )aU Fetch a given key from the cache. If the key does not exist, add the key and set it to the default value. The default value can also be any callable. If timeout is given, use that timeout for the key; otherwise use the default cache timeout. Return the value of the key stored or retrieved. r4 �r r )r rH r r: �r% r r> r r rM r r r � get_or_set� s zBaseCache.get_or_setc � sb | j || j|d�I dH }|| ju r^t|�r0|� }| j||||d�I dH | j |||d�I dH S |S )zSee get_or_set().r4 NrQ )r? rH r r< rR r r r � aget_or_set� s zBaseCache.aget_or_setc C s | j || j|d�| juS )�M Return True if the key is in the cache and has not expired. r4 rG r- r r r �has_key� s �zBaseCache.has_keyc � s | j || j|d�I d H | juS �Nr4 rO r- r r r �ahas_key� s ��zBaseCache.ahas_keyr c C sD | j || j|d�}|| ju r(td| ��|| }| j|||d� |S )zs Add delta to value in the cache. If the key does not exist, raise a ValueError exception. r4 �Key '%s' not found)r rH r" r@ �r% r �deltar r9 � new_valuer r r �incr s zBaseCache.incrc � sP | j || j|d�I dH }|| ju r.td| ��|| }| j|||d�I dH |S )z See incr().r4 NrY )r? rH r" rA rZ r r r �aincr s zBaseCache.aincrc C s | j || |d�S )zz Subtract delta from value in the cache. If the key does not exist, raise a ValueError exception. r4 )r] �r% r r[ r r r r �decr s zBaseCache.decrc � s | j || |d�I d H S rW )r^ r_ r r r �adecr! s zBaseCache.adecrc C s | � |�S )rU )rV )r% r r r r � __contains__$ s zBaseCache.__contains__c C s( |� � D ]\}}| j||||d� qg S )a� Set a bunch of values in the cache at once from a dict of key/value pairs. For certain backends (memcached), this is much more efficient than calling set() multiple times. If timeout is given, use that timeout for the key; otherwise use the default cache timeout. On backends that support it, return a list of keys that failed insertion, or an empty list if all keys were inserted successfully. rQ )�itemsr@ �r% �datar r r r9 r r r �set_many- s zBaseCache.set_manyc � s. |� � D ] \}}| j||||d�I d H qg S )NrQ )rc rA rd r r r � aset_many= s zBaseCache.aset_manyc C s |D ]}| j ||d� qdS )z� Delete a bunch of values in the cache at once. For certain backends (memcached), this is much more efficient than calling delete() multiple times. r4 N)rE �r% rJ r r r r r � delete_manyB s zBaseCache.delete_manyc � s" |D ]}| j ||d�I d H qd S rW )rF rh r r r � adelete_manyK s zBaseCache.adelete_manyc C s t d��dS )z+Remove *all* values from the cache at once.z5subclasses of BaseCache must provide a clear() methodNr6 �r% r r r �clearO s �zBaseCache.clearc � s t | jdd�� I d H S r; )r rl rk r r r �aclearU s zBaseCache.aclearc C s` |du r| j }| j|| j|d�}|| ju r6td| ��| j|||| d� | j||d� || S )zf Add delta to the cache version for the supplied key. Return the new version. Nr4 rY )r r rH r" r@ rE �r% r r[ r r9 r r r � incr_versionX s zBaseCache.incr_versionc � sr |du r| j }| j|| j|d�I dH }|| ju r<td| ��| j|||| d�I dH | j||d�I dH || S )zSee incr_version().Nr4 rY )r r? rH r" rA rF rn r r r � aincr_versionh s zBaseCache.aincr_versionc C s | � || |�S )zm Subtract delta from the cache version for the supplied key. Return the new version. )ro r_ r r r � decr_versionu s zBaseCache.decr_versionc � s | � || |�I d H S �N)rp r_ r r r � adecr_version| s zBaseCache.adecr_versionc K s dS )zClose the cache connectionNr �r% �kwargsr r r �close s zBaseCache.closec � s d S rr r rt r r r �aclose� s zBaseCache.aclose)N)N)NN)NN)N)N)N)N)N)N)r N)r N)r N)r N)N)N)r N)r N)r N)r N),r r r �objectrH r( r* r, r. r3 r5 r: r< r r? r@ rA rC rD rE rF rN rP rS rT rV rX r] r^ r` ra rb rf rg ri rj rl rm ro rp rq rs rv rw r r r r r 8 sN r c c sN t | �tkrd| tf V | D ]*}t|�dk s:t|�dkr d| V qJq d S )NzGCache key will cause errors if used with memcached: %r (longer than %s)�! � zOCache key contains characters that will cause errors if used with memcached: %r)�len�MEMCACHE_MAX_KEY_LENGTH�ord)r �charr r r r/ � s ����r/ )�__doc__r+ r0 Z asgiref.syncr Zdjango.core.exceptionsr Zdjango.utils.module_loadingr r �RuntimeWarningr r" r rx r* r| r r r r/ r r r r �<module> s Q
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__init__.cpython-39.pyc
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base.cpython-39.pyc
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db.cpython-39.pyc
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dummy.cpython-39.pyc
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filebased.cpython-39.pyc
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locmem.cpython-39.pyc
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memcached.cpython-39.pyc
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redis.cpython-39.pyc
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