Generic select function.

Fetch all trustable entries and let client decide which entries to use.

slapos/libnetworkcache.py

@@ -299,6 +299,25 @@ class NetworkcacheClient(object):
           traceback.format_exc()))
     return self.download(sha512)
 
+  def select_generic(self, key):
+    ''' Select trustable entries from shadir.
+    '''
+    url = os.path.join(self.shadir_url, key)
+    request = urllib2.Request(url=url, data=None,
+      headers=self.shadir_header_dict)
+    data = urllib2.urlopen(request).read()
+    try:
+      data_list = json.loads(data)
+    except Exception:
+      raise DirectoryNotFound('It was impossible to parse json response:\n%s' %
+        traceback.format_exc())
+    filtered_data_list = []
+    for data in data_list:
+      if len(data[1]):
+        if self._verifySignatureInCertificateList(data[0], data[1]):
+          filtered_data_list.append(data)
+    return filtered_data_list
+
   def _getSignatureString(self, content):
     """
       Return the signature based on certification file.