From: Guido van Rossum <guido@python.org>
Date: Fri, 27 Dec 1996 15:26:15 +0000 (+0000)
Subject: Crude but effective hack to clear the parser cache every so often.
X-Git-Tag: v1.5a1~645
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=671dc20efccf7fb75fa4aa7ac2d94593c58c4abf;p=python

Crude but effective hack to clear the parser cache every so often.
(Fred Drake.)
---

diff --git a/Lib/urlparse.py b/Lib/urlparse.py
index 571ef0eb0c..91775333c7 100644
--- a/Lib/urlparse.py
+++ b/Lib/urlparse.py
@@ -19,9 +19,11 @@ uses_fragment = ['ftp', 'hdl', 'http', 'gopher', 'news', 'nntp', 'wais',
 # Characters valid in scheme names
 scheme_chars = string.letters + string.digits + '+-.'
 
+MAX_CACHE_SIZE = 2000
 _parse_cache = {}
 
 def clear_cache():
+    """Clear the parse cache."""
     global _parse_cache
     _parse_cache = {}
 
@@ -35,6 +37,8 @@ def urlparse(url, scheme = '', allow_framents = 1):
 	key = url, scheme, allow_framents
 	if _parse_cache.has_key(key):
 	    return _parse_cache[key]
+	if len(_parse_cache) >= MAX_CACHE_SIZE:	# avoid runaway growth
+	    clear_cache()
 	netloc = path = params = query = fragment = ''
 	i = string.find(url, ':')
 	if i > 0: