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# Source code for slixmpp.plugins.xep_0131.headers

    # Slixmpp: The Slick XMPP Library
    # Copyright (C) 2011 Nathanael C. Fritz, Lance J.T. Stout
    # This file is part of Slixmpp.
    # See the file LICENSE for copying permission.
    from slixmpp import Message, Presence
    from slixmpp.xmlstream import register_stanza_plugin
    from slixmpp.plugins import BasePlugin
    from slixmpp.plugins.xep_0131 import stanza
    from slixmpp.plugins.xep_0131.stanza import Headers

    class XEP_0131(BasePlugin):

        name = 'xep_0131'
        description = 'XEP-0131: Stanza Headers and Internet Metadata'
        dependencies = {'xep_0030'}
        stanza = stanza
        default_config = {
            'supported_headers': set()
        }

        def plugin_init(self):
            register_stanza_plugin(Message, Headers)
            register_stanza_plugin(Presence, Headers)

        def plugin_end(self):
            self.xmpp.plugin['xep_0030'].del_feature(feature=Headers.namespace)
            for header in self.supported_headers:
                self.xmpp.plugin['xep_0030'].del_feature(
                        feature='%s#%s' % (Headers.namespace, header))

        def session_bind(self, jid):
            self.xmpp.plugin['xep_0030'].add_feature(Headers.namespace)
            for header in self.supported_headers:
                self.xmpp.plugin['xep_0030'].add_feature('%s#%s' % (
                    Headers.namespace,
                    header))