Source Code for Module dns.rdtypes.ANY.URI

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 2  # Copyright (C) 2015 Red Hat, Inc. 
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16   
17  import struct 
18   
19  import dns.exception 
20  import dns.rdata 
21  import dns.name 
22   
23 -class URI(dns.rdata.Rdata): 
24      """URI record 
25   
26      @ivar priority: the priority 
27      @type priority: int 
28      @ivar weight: the weight 
29      @type weight: int 
30      @ivar target: the target host 
31      @type target: dns.name.Name object 
32      @see: draft-faltstrom-uri-13""" 
33   
34      __slots__ = ['priority', 'weight', 'target'] 
35   
36 -    def __init__(self, rdclass, rdtype, priority, weight, target): 
37          super(URI, self).__init__(rdclass, rdtype) 
38          self.priority = priority 
39          self.weight = weight 
40          if len(target) < 1: 
41              raise dns.exception.SyntaxError("URI target cannot be empty") 
42          self.target = target 
43   
44 -    def to_text(self, origin=None, relativize=True, **kw): 
45          return '%d %d "%s"' % (self.priority, self.weight, self.target) 
46   
47 -    def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True): 
48          priority = tok.get_uint16() 
49          weight = tok.get_uint16() 
50          target = tok.get().unescape() 
51          if not (target.is_quoted_string() or target.is_identifier()): 
52              raise dns.exception.SyntaxError("URI target must be a string") 
53          tok.get_eol() 
54          return cls(rdclass, rdtype, priority, weight, target.value) 
55   
56      from_text = classmethod(from_text) 
57   
58 -    def to_wire(self, file, compress = None, origin = None): 
59          two_ints = struct.pack("!HH", self.priority, self.weight) 
60          file.write(two_ints) 
61          file.write(self.target) 
62   
63 -    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None): 
64          if rdlen < 5: 
65              raise dns.exception.FormError('URI RR is shorter than 5 octets') 
66   
67          (priority, weight) = struct.unpack('!HH', wire[current : current + 4]) 
68          current += 4 
69          rdlen -= 4 
70          target = wire[current : current + rdlen] 
71          current += rdlen 
72   
73          return cls(rdclass, rdtype, priority, weight, target) 
74   
75      from_wire = classmethod(from_wire) 
76