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Crude but effective hack to clear the parser cache every so often.

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(Fred Drake.)
This commit is contained in:
Guido van Rossum 1996-12-27 15:26:15 +00:00
parent babab6869f
commit 671dc20efc
1 changed files with 4 additions and 0 deletions
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4
Lib/urlparse.py
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@ -19,9 +19,11 @@ uses_fragment = ['ftp', 'hdl', 'http', 'gopher', 'news', 'nntp', 'wais',
# Characters valid in scheme names # Characters valid in scheme names
scheme_chars = string.letters + string.digits + '+-.' scheme_chars = string.letters + string.digits + '+-.'
MAX_CACHE_SIZE = 2000
_parse_cache = {} _parse_cache = {}
def clear_cache(): def clear_cache():
"""Clear the parse cache."""
global _parse_cache global _parse_cache
_parse_cache = {} _parse_cache = {}
@ -35,6 +37,8 @@ def urlparse(url, scheme = '', allow_framents = 1):
key = url, scheme, allow_framents key = url, scheme, allow_framents
if _parse_cache.has_key(key): if _parse_cache.has_key(key):
return _parse_cache[key] return _parse_cache[key]
if len(_parse_cache) >= MAX_CACHE_SIZE: # avoid runaway growth
clear_cache()
netloc = path = params = query = fragment = '' netloc = path = params = query = fragment = ''
i = string.find(url, ':') i = string.find(url, ':')
if i > 0: if i > 0: