ís_cached fix

--HG--
extra : convert_revision : svn%3Ab85faa78-f9eb-468e-a121-7cced6da292c%4086

scrapy/trunk/scrapy/contrib/downloadermiddleware/cache.py

@@ -112,7 +112,7 @@ class Cache(object):
 
     def is_cached(self, domain, key):
         pickled_meta = os.path.join(self.requestpath(domain, key), 'pickled_meta')
-        if os.path.exists(requestpath):
+        if os.path.exists(pickled_meta):
             with open(pickled_meta) as f:
                 metadata = cPickle.load(f)
             if datetime.datetime.utcnow() <= metadata['timestamp'] + datetime.timedelta(seconds=settings.getint('CACHE2_EXPIRATION_SECS')):
@@ -128,10 +128,10 @@ class Cache(object):
         Return response dictionary if request has correspondent cache record;
         return None if not.
         """
-        requestpath = self.requestpath(domain, key)
-        if not os.path.exists(requestpath):
+        if not self.is_cached(domain, key):
             return None # not cached
 
+        requestpath = self.requestpath(domain, key)
         metadata = responsebody = responseheaders = None
         with open(os.path.join(requestpath, 'pickled_meta')) as f:
             metadata = cPickle.load(f)

scrapy/trunk/scrapy/xpath/selector.py

@@ -86,6 +86,10 @@ class XPathSelector(object):
 class XPathSelectorList(list):
     """List of XPathSelector objects"""
 
+    def __getitem__(self, i):
+        return '__getitem__'
+        #return XPathSelectorList(list.__getslice__(self, i, j))
+
     def x(self, xpath):
         """Perform the given XPath query on each XPathSelector of the list and
         return a new (flattened) XPathSelectorList of the results"""