The parameter shacache can be None as well.

Because the user can just use the 'select' method to retrieve the information
from shadir server.

slapos/libnetworkcache/__init__.py

@@ -29,30 +29,31 @@ class NetworkcacheClient(object):
      - SHACACHE
   '''
 
-  def __init__(self, shacache, shadir=None):
+  def __init__(self, shacache=None, shadir=None):
     ''' Set the initial values. '''
     # ShaCache Properties
-    shacache_urlparse = urlparse(shacache)
-    self.shacache_host = shacache_urlparse.hostname
-    if shacache_urlparse.port is not None:
-      self.shacache_host += ':%s' % shacache_urlparse.port
-
-    self.shacache_header_dict = {'Content-Type': 'application/json'}
-    shacache_user = shacache_urlparse.username
-    shacache_passwd = shacache_urlparse.password
-    if shacache_user is not None:
-      authentication_string = '%s:%s' % (shacache_user, shacache_passwd)
-      base64string = base64.encodestring(authentication_string).strip()
-      self.shacache_header_dict['Authorization'] = 'Basic %s' % base64string
-
-    self.shacache_path = '/'
-    if shacache_urlparse.path not in ('', '/'):
-      self.shacache_path = shacache_urlparse.path
-
-    shacache_urlparse = urlparse(shacache)
-    self.shacache_host = shacache_urlparse.hostname
-    if shacache_urlparse.port is not None:
-      self.shacache_host += ':%s' % shacache_urlparse.port
+    if shacache is not None:
+      shacache_urlparse = urlparse(shacache)
+      self.shacache_host = shacache_urlparse.hostname
+      if shacache_urlparse.port is not None:
+        self.shacache_host += ':%s' % shacache_urlparse.port
+
+      self.shacache_header_dict = {'Content-Type': 'application/json'}
+      shacache_user = shacache_urlparse.username
+      shacache_passwd = shacache_urlparse.password
+      if shacache_user is not None:
+        authentication_string = '%s:%s' % (shacache_user, shacache_passwd)
+        base64string = base64.encodestring(authentication_string).strip()
+        self.shacache_header_dict['Authorization'] = 'Basic %s' % base64string
+
+      self.shacache_path = '/'
+      if shacache_urlparse.path not in ('', '/'):
+        self.shacache_path = shacache_urlparse.path
+
+      shacache_urlparse = urlparse(shacache)
+      self.shacache_host = shacache_urlparse.hostname
+      if shacache_urlparse.port is not None:
+        self.shacache_host += ':%s' % shacache_urlparse.port
 
     # ShaDir Properties
     if shadir is not None: