mirror of https://github.com/morpheus65535/bazarr
90 lines
3.1 KiB
Python
90 lines
3.1 KiB
Python
# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
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# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
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#
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# Permission to use, copy, modify, and distribute this software and its
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# documentation for any purpose with or without fee is hereby granted,
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# provided that the above copyright notice and this permission notice
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# appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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"""MX-like base classes."""
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import struct
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import dns.exception
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import dns.immutable
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import dns.rdata
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import dns.name
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import dns.rdtypes.util
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@dns.immutable.immutable
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class MXBase(dns.rdata.Rdata):
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"""Base class for rdata that is like an MX record."""
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__slots__ = ['preference', 'exchange']
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def __init__(self, rdclass, rdtype, preference, exchange):
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super().__init__(rdclass, rdtype)
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self.preference = self._as_uint16(preference)
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self.exchange = self._as_name(exchange)
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def to_text(self, origin=None, relativize=True, **kw):
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exchange = self.exchange.choose_relativity(origin, relativize)
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return '%d %s' % (self.preference, exchange)
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@classmethod
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def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True,
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relativize_to=None):
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preference = tok.get_uint16()
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exchange = tok.get_name(origin, relativize, relativize_to)
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return cls(rdclass, rdtype, preference, exchange)
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def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
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pref = struct.pack("!H", self.preference)
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file.write(pref)
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self.exchange.to_wire(file, compress, origin, canonicalize)
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@classmethod
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def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
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preference = parser.get_uint16()
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exchange = parser.get_name(origin)
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return cls(rdclass, rdtype, preference, exchange)
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def _processing_priority(self):
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return self.preference
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@classmethod
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def _processing_order(cls, iterable):
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return dns.rdtypes.util.priority_processing_order(iterable)
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@dns.immutable.immutable
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class UncompressedMX(MXBase):
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"""Base class for rdata that is like an MX record, but whose name
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is not compressed when converted to DNS wire format, and whose
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digestable form is not downcased."""
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def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
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super()._to_wire(file, None, origin, False)
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@dns.immutable.immutable
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class UncompressedDowncasingMX(MXBase):
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"""Base class for rdata that is like an MX record, but whose name
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is not compressed when convert to DNS wire format."""
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def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
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super()._to_wire(file, None, origin, canonicalize)
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