--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/django/core/cache/__init__.py	Fri Jul 18 18:22:23 2008 +0000
@@ -0,0 +1,63 @@
+"""
+Caching framework.
+
+This package defines set of cache backends that all conform to a simple API.
+In a nutshell, a cache is a set of values -- which can be any object that
+may be pickled -- identified by string keys.  For the complete API, see
+the abstract BaseCache class in django.core.cache.backends.base.
+
+Client code should not access a cache backend directly; instead it should
+either use the "cache" variable made available here, or it should use the
+get_cache() function made available here. get_cache() takes a backend URI
+(e.g. "memcached://127.0.0.1:11211/") and returns an instance of a backend
+cache class.
+
+See docs/cache.txt for information on the public API.
+"""
+
+from cgi import parse_qsl
+from django.conf import settings
+from django.core.cache.backends.base import InvalidCacheBackendError
+
+BACKENDS = {
+    # name for use in settings file --> name of module in "backends" directory
+    'memcached': 'memcached',
+    'locmem': 'locmem',
+    'file': 'filebased',
+    'db': 'db',
+    'dummy': 'dummy',
+}
+
+DEPRECATED_BACKENDS = {
+    # deprecated backend --> replacement module
+    'simple': 'locmem',
+}
+
+def get_cache(backend_uri):
+    if backend_uri.find(':') == -1:
+        raise InvalidCacheBackendError, "Backend URI must start with scheme://"
+    scheme, rest = backend_uri.split(':', 1)
+    if not rest.startswith('//'):
+        raise InvalidCacheBackendError, "Backend URI must start with scheme://"
+    if scheme in DEPRECATED_BACKENDS:
+        import warnings
+        warnings.warn("'%s' backend is deprecated. Use '%s' instead." % 
+            (scheme, DEPRECATED_BACKENDS[scheme]), DeprecationWarning)
+        scheme = DEPRECATED_BACKENDS[scheme]
+    if scheme not in BACKENDS:
+        raise InvalidCacheBackendError, "%r is not a valid cache backend" % scheme
+
+    host = rest[2:]
+    qpos = rest.find('?')
+    if qpos != -1:
+        params = dict(parse_qsl(rest[qpos+1:]))
+        host = rest[2:qpos]
+    else:
+        params = {}
+    if host.endswith('/'):
+        host = host[:-1]
+
+    cache_class = getattr(__import__('django.core.cache.backends.%s' % BACKENDS[scheme], {}, {}, ['']), 'CacheClass')
+    return cache_class(host, params)
+
+cache = get_cache(settings.CACHE_BACKEND)