Add get_communication_params interface to plugins

To allow authentication plugins such as using client certificates or
doing kerberos authentication with every request we need a way for the
plugins to manipulate the send parameters.

Change-Id: Ib9e81773ab988ea05869bc27097d2b25e963e59c
Blueprint: generic-plugins

1 files changed, 17 insertions, 0 deletions

diff --git a/keystoneclient/exceptions.py b/keystoneclient/exceptions.py
index 0150bf5..fb0bd41 100644
--- a/keystoneclient/exceptions.py
+++ b/keystoneclient/exceptions.py
@@ -97,6 +97,23 @@ class NoMatchingPlugin(ClientException):
         super(NoMatchingPlugin, self).__init__(msg)
 
 
+class UnsupportedParameters(ClientException):
+    """A parameter that was provided or returned is not supported.
+
+    :param list(str) names: Names of the unsupported parameters.
+
+    .. py:attribute:: names
+
+        Names of the unsupported parameters.
+    """
+
+    def __init__(self, names):
+        self.names = names
+
+        m = _('The following parameters were given that are unsupported: %s')
+        super(UnsupportedParameters, self).__init__(m % ', '.join(self.names))
+
+
 class InvalidResponse(ClientException):
     """The response from the server is not valid for this request."""