# designate.objects.rrdata_spf

# Source code for designate.objects.rrdata_spf

    # Copyright (c) 2014 Rackspace Hosting
    # All Rights Reserved.
    #
    #    Licensed under the Apache License, Version 2.0 (the "License"); you may
    #    not use this file except in compliance with the License. You may obtain
    #    a copy of the License at
    #
    #         http://www.apache.org/licenses/LICENSE-2.0
    #
    #    Unless required by applicable law or agreed to in writing, software
    #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    #    License for the specific language governing permissions and limitations
    #    under the License.
    from designate.objects import base
    from designate.objects import fields
    from designate.objects.record import Record
    from designate.objects.record import RecordList

    @base.DesignateRegistry.register
    class SPF(Record):
        """
        SPF Resource Record Type
        Defined in: RFC4408
        """
        fields = {
            'txt_data': fields.StringFields()
        }

        def from_string(self, value):
            if not value.startswith('"') and not value.endswith('"'):
                # value with spaces should be quoted as per RFC1035 5.1
                for element in value:
                    if element.isspace():
                        raise ValueError(
                            'Empty spaces are not allowed in SPF record, '
                            'unless wrapped in double quotes.'
                        )
            else:
                # quotes within value should be escaped with backslash
                strip_value = value.strip('"')
                for index, char in enumerate(strip_value):
                    if char == '"':
                        if strip_value[index - 1] != "\\":
                            raise ValueError(
                                'Quotation marks should be escaped with backslash.'
                            )

            self.txt_data = value

        # The record type is defined in the RFC. This will be used when the record
        # is sent by mini-dns.
        RECORD_TYPE = 99

    @base.DesignateRegistry.register
    class SPFList(RecordList):

        LIST_ITEM_TYPE = SPF
        fields = {
            'objects': fields.ListOfObjectsField('SPF'),
        }

this page last updated: 2026-04-13 15:37:16

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