52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
import warnings
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from openid import message as message_module
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class Extension(object):
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"""An interface for OpenID extensions.
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@ivar ns_uri: The namespace to which to add the arguments for this
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extension
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"""
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ns_uri = None
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ns_alias = None
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def getExtensionArgs(self):
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"""Get the string arguments that should be added to an OpenID
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message for this extension.
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@returns: A dictionary of completely non-namespaced arguments
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to be added. For example, if the extension's alias is
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'uncle', and this method returns {'meat':'Hot Rats'}, the
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final message will contain {'openid.uncle.meat':'Hot Rats'}
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"""
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raise NotImplementedError()
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def toMessage(self, message=None):
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"""Add the arguments from this extension to the provided
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message, or create a new message containing only those
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arguments.
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@returns: The message with the extension arguments added
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"""
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if message is None:
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warnings.warn(
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'Passing None to Extension.toMessage is deprecated. '
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'Creating a message assuming you want OpenID 2.',
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DeprecationWarning,
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stacklevel=2)
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message = message_module.Message(message_module.OPENID2_NS)
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implicit = message.isOpenID1()
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try:
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message.namespaces.addAlias(
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self.ns_uri, self.ns_alias, implicit=implicit)
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except KeyError:
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if message.namespaces.getAlias(self.ns_uri) != self.ns_alias:
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raise
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message.updateArgs(self.ns_uri, self.getExtensionArgs())
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return message
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