mirror of https://github.com/morpheus65535/bazarr
81 lines
2.8 KiB
Python
81 lines
2.8 KiB
Python
# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
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# Copyright (C) 2015 Red Hat, 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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import struct
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import dns.exception
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import dns.rdata
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import dns.name
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from dns._compat import text_type
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class URI(dns.rdata.Rdata):
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"""URI record
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@ivar priority: the priority
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@type priority: int
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@ivar weight: the weight
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@type weight: int
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@ivar target: the target host
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@type target: dns.name.Name object
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@see: draft-faltstrom-uri-13"""
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__slots__ = ['priority', 'weight', 'target']
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def __init__(self, rdclass, rdtype, priority, weight, target):
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super(URI, self).__init__(rdclass, rdtype)
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self.priority = priority
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self.weight = weight
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if len(target) < 1:
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raise dns.exception.SyntaxError("URI target cannot be empty")
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if isinstance(target, text_type):
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self.target = target.encode()
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else:
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self.target = target
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def to_text(self, origin=None, relativize=True, **kw):
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return '%d %d "%s"' % (self.priority, self.weight,
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self.target.decode())
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@classmethod
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def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
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priority = tok.get_uint16()
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weight = tok.get_uint16()
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target = tok.get().unescape()
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if not (target.is_quoted_string() or target.is_identifier()):
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raise dns.exception.SyntaxError("URI target must be a string")
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tok.get_eol()
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return cls(rdclass, rdtype, priority, weight, target.value)
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def to_wire(self, file, compress=None, origin=None):
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two_ints = struct.pack("!HH", self.priority, self.weight)
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file.write(two_ints)
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file.write(self.target)
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@classmethod
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def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
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if rdlen < 5:
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raise dns.exception.FormError('URI RR is shorter than 5 octets')
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(priority, weight) = struct.unpack('!HH', wire[current: current + 4])
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current += 4
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rdlen -= 4
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target = wire[current: current + rdlen]
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current += rdlen
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return cls(rdclass, rdtype, priority, weight, target)
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