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from zope.interface import implements
from repoze.zodbconn.middleware import get_conn
from repoze.bfg.interfaces import IPolicy
class ZODBGetitemPolicy:
implements(IPolicy)
def __init__(self, dbname, prefix=()):
self.dbname = dbname
self.prefix = prefix
self.get_conn = get_conn
def __call__(self, environ):
conn = self.get_conn(environ, self.dbname)
if conn is None:
raise ValueError('No such connection %s' % self.dbname)
path = environ['PATH_INFO'].split('/')
path = list(self.prefix) + path
ob = conn.open()
name = ''
while path:
element = path.pop(0)
try:
ob = ob[element]
except AttributeError, what:
raise AttributeError(str(what[0]) + ' (element: '+element+')')
except KeyError:
if path:
name = path.pop(0)
break
return ob, name, path
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