47 lines
1.1 KiB
Python
47 lines
1.1 KiB
Python
# -*- coding: utf-8 -*-
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'''
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File-based cache
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shove's psuedo-URL for file caches follows the form:
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file://<path>
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Where the path is a URL path to a directory on a local filesystem.
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Alternatively, a native pathname to the directory can be passed as the 'engine'
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argument.
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'''
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import time
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from shove import FileBase
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from shove.cache.simple import SimpleCache
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class FileCache(FileBase, SimpleCache):
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'''File-based cache backend'''
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def __init__(self, engine, **kw):
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super(FileCache, self).__init__(engine, **kw)
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def __getitem__(self, key):
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try:
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exp, value = super(FileCache, self).__getitem__(key)
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# Remove item if time has expired.
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if exp < time.time():
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del self[key]
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raise KeyError(key)
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return value
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except:
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raise KeyError(key)
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def __setitem__(self, key, value):
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if len(self) >= self._max_entries:
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self._cull()
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super(FileCache, self).__setitem__(
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key, (time.time() + self.timeout, value)
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)
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__all__ = ['FileCache']
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