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
|
import collections
from .client import Client
from .lock import Lock
from .election import LeaderElection
class EtcdResult(object):
_node_props = {
'key': None,
'value': None,
'expiration': None,
'ttl': None,
'modifiedIndex': None,
'createdIndex': None,
'newKey': False,
'dir': False,
}
def __init__(self, action=None, node=None, prevNode=None, **kwdargs):
"""
Creates an EtcdResult object.
Args:
action (str): The action that resulted in key creation
node (dict): The dictionary containing all node information.
"""
self.action = action
for (key, default) in self._node_props.items():
if key in node:
setattr(self, key, node[key])
else:
setattr(self, key, default)
self._children = []
if self.dir and 'nodes' in node:
# We keep the data in raw format, converting them only when needed
self._children = node['nodes']
if prevNode:
self._prev_node = EtcdResult(None, node=prevNode)
# See issue 38: when returning a write() op etcd has a bogus result.
if self._prev_node.dir and not self.dir:
self.dir = True
def parse_headers(self, response):
headers = response.getheaders()
self.etcd_index = int(headers.get('x-etcd-index', 1))
self.raft_index = int(headers.get('x-raft-index', 1))
def get_subtree(self, leaves_only=False):
"""
Get all the subtree resulting from a recursive=true call to etcd.
Args:
leaves_only (bool): if true, only value nodes are returned
"""
if not self._children:
#if the current result is a leaf, return itself
yield self
return
for n in self._children:
node = EtcdResult(None, n)
if not leaves_only:
#Return also dirs, not just value nodes
yield node
for child in node.children:
yield child
return
@property
def leaves(self):
return self.get_subtree(leaves_only=True)
@property
def children(self):
""" Deprecated, use EtcdResult.leaves instead """
return self.leaves
def __eq__(self, other):
if not (type(self) is type(other)):
return False
for k in self._node_props.keys():
try:
a = getattr(self, k)
b = getattr(other, k)
if a != b:
return False
except:
return False
return True
def __ne__(self, other):
return not self.__eq__(other)
def __repr__(self):
return "%s(%r)" % (self.__class__, self.__dict__)
class EtcdException(Exception):
"""
Generic Etcd Exception.
"""
pass
class EtcdError(object):
# See https://github.com/coreos/etcd/blob/master/Documentation/errorcode.md
error_exceptions = {
100: KeyError,
101: ValueError,
102: KeyError,
103: Exception,
104: KeyError,
105: KeyError,
106: KeyError,
200: ValueError,
201: ValueError,
202: ValueError,
203: ValueError,
300: Exception,
301: Exception,
400: Exception,
401: EtcdException,
500: EtcdException
}
@classmethod
def handle(cls, errorCode=None, message=None, cause=None, **kwdargs):
""" Decodes the error and throws the appropriate error message"""
try:
msg = "{} : {}".format(message, cause)
exc = cls.error_exceptions[errorCode]
except:
msg = "Unable to decode server response"
exc = EtcdException
raise exc(msg)
# Attempt to enable urllib3's SNI support, if possible
# Blatantly copied from requests.
try:
from urllib3.contrib import pyopenssl
pyopenssl.inject_into_urllib3()
except ImportError:
pass
|
