Modify unique token to use url safe characters. Looks like the merge of the methods I chose cause url unsafe / to be emitted sometimes. This causes poe post to fail as the url includes the key and the / messes up the rest route url parsing code.

try:
    # Python 3+.
    from xmlrpc import client, server
    server.SimpleXMLRPCDispatcher
except (ImportError, AttributeError):
    # Python 2.
    import xmlrpclib as client  # noqa: F401
    import SimpleXMLRPCServer as server