1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
# Copyright (c) 2010 Mitch Garnaat http://garnaat.org/
# Copyright (c) 2010, Eucalyptus Systems, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
import xml.sax
from boto import utils
class XmlHandler(xml.sax.ContentHandler):
def __init__(self, root_node, connection):
self.connection = connection
self.nodes = [('root', root_node)]
self.current_text = ''
def startElement(self, name, attrs):
self.current_text = ''
t = self.nodes[-1][1].startElement(name, attrs, self.connection)
if t is not None:
if isinstance(t, tuple):
self.nodes.append(t)
else:
self.nodes.append((name, t))
def endElement(self, name):
self.nodes[-1][1].endElement(name, self.current_text, self.connection)
if self.nodes[-1][0] == name:
self.nodes.pop()
self.current_text = ''
def characters(self, content):
self.current_text += content
def parse(self, s):
if not isinstance(s, bytes):
s = s.encode('utf-8')
xml.sax.parseString(s, self)
class Element(dict):
def __init__(self, connection=None, element_name=None,
stack=None, parent=None, list_marker=('Set',),
item_marker=('member', 'item'),
pythonize_name=False):
dict.__init__(self)
self.connection = connection
self.element_name = element_name
self.list_marker = utils.mklist(list_marker)
self.item_marker = utils.mklist(item_marker)
if stack is None:
self.stack = []
else:
self.stack = stack
self.pythonize_name = pythonize_name
self.parent = parent
def __getattr__(self, key):
if key in self:
return self[key]
for k in self:
e = self[k]
if isinstance(e, Element):
try:
return getattr(e, key)
except AttributeError:
pass
raise AttributeError
def get_name(self, name):
if self.pythonize_name:
name = utils.pythonize_name(name)
return name
def startElement(self, name, attrs, connection):
self.stack.append(name)
for lm in self.list_marker:
if name.endswith(lm):
l = ListElement(self.connection, name, self.list_marker,
self.item_marker, self.pythonize_name)
self[self.get_name(name)] = l
return l
if len(self.stack) > 0:
element_name = self.stack[-1]
e = Element(self.connection, element_name, self.stack, self,
self.list_marker, self.item_marker,
self.pythonize_name)
self[self.get_name(element_name)] = e
return (element_name, e)
else:
return None
def endElement(self, name, value, connection):
if len(self.stack) > 0:
self.stack.pop()
value = value.strip()
if value:
if isinstance(self.parent, Element):
self.parent[self.get_name(name)] = value
elif isinstance(self.parent, ListElement):
self.parent.append(value)
class ListElement(list):
def __init__(self, connection=None, element_name=None,
list_marker=['Set'], item_marker=('member', 'item'),
pythonize_name=False):
list.__init__(self)
self.connection = connection
self.element_name = element_name
self.list_marker = list_marker
self.item_marker = item_marker
self.pythonize_name = pythonize_name
def get_name(self, name):
if self.pythonize_name:
name = utils.pythonize_name(name)
return name
def startElement(self, name, attrs, connection):
for lm in self.list_marker:
if name.endswith(lm):
l = ListElement(self.connection, name,
self.list_marker, self.item_marker,
self.pythonize_name)
setattr(self, self.get_name(name), l)
return l
if name in self.item_marker:
e = Element(self.connection, name, parent=self,
list_marker=self.list_marker,
item_marker=self.item_marker,
pythonize_name=self.pythonize_name)
self.append(e)
return e
else:
return None
def endElement(self, name, value, connection):
if name == self.element_name:
if len(self) > 0:
empty = []
for e in self:
if isinstance(e, Element):
if len(e) == 0:
empty.append(e)
for e in empty:
self.remove(e)
else:
setattr(self, self.get_name(name), value)
|
