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# Copyright (C) 2006, 2007, 2009-2011 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

"""TXT-like base class."""

import dns.exception
import dns.rdata
import dns.tokenizer

class TXTBase(dns.rdata.Rdata):
    """Base class for rdata that is like a TXT record

    @ivar strings: the text strings
    @type strings: list of string
    @see: RFC 1035"""

    __slots__ = ['strings']

    def __init__(self, rdclass, rdtype, strings):
        super(TXTBase, self).__init__(rdclass, rdtype)
        if isinstance(strings, str):
            strings = [ strings ]
        self.strings = strings[:]

    def to_text(self, origin=None, relativize=True, **kw):
        txt = ''
        prefix = ''
        for s in self.strings:
            txt += '%s"%s"' % (prefix, dns.rdata._escapify(s))
            prefix = ' '
        return txt

    def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True):
        strings = []
        while 1:
            token = tok.get().unescape()
            if token.is_eol_or_eof():
                break
            if not (token.is_quoted_string() or token.is_identifier()):
                raise dns.exception.SyntaxError("expected a string")
            if len(token.value) > 255:
                raise dns.exception.SyntaxError("string too long")
            strings.append(token.value)
        if len(strings) == 0:
            raise dns.exception.UnexpectedEnd
        return cls(rdclass, rdtype, strings)

    from_text = classmethod(from_text)

    def to_wire(self, file, compress = None, origin = None):
        for s in self.strings:
            l = len(s)
            assert l < 256
            byte = chr(l)
            file.write(byte)
            file.write(s)

    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
        strings = []
        while rdlen > 0:
            l = ord(wire[current])
            current += 1
            rdlen -= 1
            if l > rdlen:
                raise dns.exception.FormError
            s = wire[current : current + l].unwrap()
            current += l
            rdlen -= l
            strings.append(s)
        return cls(rdclass, rdtype, strings)

    from_wire = classmethod(from_wire)

    def _cmp(self, other):
        return cmp(self.strings, other.strings)

Filemanager

Name Type Size Permission Actions
ANY Folder 0755
IN Folder 0755
.__init__.pyo.40009 File 265 B 0644
.dsbase.pyo.40009 File 3.22 KB 0644
.mxbase.pyo.40009 File 4.62 KB 0644
.nsbase.pyo.40009 File 3.55 KB 0644
__init__.py File 880 B 0644
__init__.pyc File 265 B 0644
__init__.pyo File 265 B 0644
dsbase.py File 3.38 KB 0644
dsbase.pyc File 3.22 KB 0644
dsbase.pyo File 3.22 KB 0644
mxbase.py File 3.88 KB 0644
mxbase.pyc File 4.62 KB 0644
mxbase.pyo File 4.62 KB 0644
nsbase.py File 2.92 KB 0644
nsbase.pyc File 3.55 KB 0644
nsbase.pyo File 3.55 KB 0644
txtbase.py File 2.92 KB 0644
txtbase.pyc File 3.02 KB 0644
txtbase.pyo File 2.97 KB 0644