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N)r% r c s" t � �|� t|�| _t� | _d S )N)r& r' rN � _wheel_cacher] � _ephem_cache)r, r% )r- r! r" r' � s zWheelCache.__init__)r. r c C s | j �|�S )N)rp r? )r, r. r! r! r" r? � s z WheelCache.get_path_for_linkc C s | j �|�S )N)rq r? )r, r. r! r! r" �get_ephem_path_for_link� s z"WheelCache.get_ephem_path_for_link)r. rE rF r c C s | � |||�}|d kr|S |jS )N)�get_cache_entryr. )r, r. rE rF Z cache_entryr! r! r" rG � s zWheelCache.getc C sP | j j|||d�}||k r&t|dd�S | jj|||d�}||k rLt|dd�S dS )z�Returns a CacheEntry with a link to a cached item if it exists or None. The cache entry indicates if the item was found in the persistent or ephemeral cache. )r. rE rF T)ra FN)rp rG r` rq )r, r. rE rF �retvalr! r! r" rs � s zWheelCache.get_cache_entry)r% � download_infor c C s� t | �t }|�� r|yt�|jdd��}W n0 tk rZ } zt�d||� W d d }~X Y n"X |j |j kr|t�d|j | |j � |j |� � dd� d S )Nzutf-8)rb zPCould not read origin file %s in cache entry (%s). 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