19 lines
606 B
Python
19 lines
606 B
Python
"""
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This module provides a KEY_FUNCTION suitable for use with a memcache backend
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so that we can cache any keys, not just ones that memcache would ordinarily accept
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"""
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from django.utils.hashcompat import md5_constructor
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from django.utils.encoding import smart_str
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import string
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def safe_key(key, key_prefix, version):
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safe_key = smart_str(key)
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for char in safe_key:
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if ord(char) < 33 or ord(char) == 127:
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safe_key = safe_key.replace(char, '_')
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if len(safe_key) > 250:
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safe_key = md5_constructor(safe_key)
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return ":".join([key_prefix, str(version), safe_key])
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