Package dns :: Package rdtypes :: Package ANY :: Module URI
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Source Code for Module dns.rdtypes.ANY.URI

 1  # Copyright (C) 2003-2007, 2009-2011 Nominum, Inc. 
 2  # Copyright (C) 2015 Red Hat, Inc. 
 3  # 
 4  # Permission to use, copy, modify, and distribute this software and its 
 5  # documentation for any purpose with or without fee is hereby granted, 
 6  # provided that the above copyright notice and this permission notice 
 7  # appear in all copies. 
 8  # 
 9  # THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES 
10  # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 
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15  # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 
16   
17  import struct 
18   
19  import dns.exception 
20  import dns.rdata 
21  import dns.name 
22  from dns._compat import text_type 
23 24 25 -class URI(dns.rdata.Rdata):
26 27 """URI record 28 29 @ivar priority: the priority 30 @type priority: int 31 @ivar weight: the weight 32 @type weight: int 33 @ivar target: the target host 34 @type target: dns.name.Name object 35 @see: draft-faltstrom-uri-13""" 36 37 __slots__ = ['priority', 'weight', 'target'] 38
39 - def __init__(self, rdclass, rdtype, priority, weight, target):
40 super(URI, self).__init__(rdclass, rdtype) 41 self.priority = priority 42 self.weight = weight 43 if len(target) < 1: 44 raise dns.exception.SyntaxError("URI target cannot be empty") 45 if isinstance(target, text_type): 46 self.target = target.encode() 47 else: 48 self.target = target
49
50 - def to_text(self, origin=None, relativize=True, **kw):
51 return '%d %d "%s"' % (self.priority, self.weight, 52 self.target.decode())
53 54 @classmethod
55 - def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
56 priority = tok.get_uint16() 57 weight = tok.get_uint16() 58 target = tok.get().unescape() 59 if not (target.is_quoted_string() or target.is_identifier()): 60 raise dns.exception.SyntaxError("URI target must be a string") 61 tok.get_eol() 62 return cls(rdclass, rdtype, priority, weight, target.value)
63
64 - def to_wire(self, file, compress=None, origin=None):
65 two_ints = struct.pack("!HH", self.priority, self.weight) 66 file.write(two_ints) 67 file.write(self.target)
68 69 @classmethod
70 - def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
71 if rdlen < 5: 72 raise dns.exception.FormError('URI RR is shorter than 5 octets') 73 74 (priority, weight) = struct.unpack('!HH', wire[current: current + 4]) 75 current += 4 76 rdlen -= 4 77 target = wire[current: current + rdlen] 78 current += rdlen 79 80 return cls(rdclass, rdtype, priority, weight, target)
81