def _correct_instance_id(self, id):
'''
Azure stores the instance ID with an incorrect byte ordering for the
first parts. For example, the ID returned by the metadata service:
D0DF4C54-4ECB-4A4B-9954-5BDF3ED5C3B8
will be found as:
544CDFD0-CB4E-4B4A-9954-5BDF3ED5C3B8
This code corrects the byte order such that it is consistent with
that returned by the metadata service.
'''
if not UUID_PATTERN.match(id):
return id
parts = id.split('-')
return '-'.join([
textutil.swap_hexstring(parts[0], width=2),
textutil.swap_hexstring(parts[1], width=2),
textutil.swap_hexstring(parts[2], width=2),
parts[3],
parts[4]
])
def _correct_instance_id(self, id):
'''
Azure stores the instance ID with an incorrect byte ordering for the
first parts. For example, the ID returned by the metadata service:
D0DF4C54-4ECB-4A4B-9954-5BDF3ED5C3B8
will be found as:
544CDFD0-CB4E-4B4A-9954-5BDF3ED5C3B8
This code corrects the byte order such that it is consistent with
that returned by the metadata service.
'''
if not UUID_PATTERN.match(id):
return id
parts = id.split('-')
return '-'.join([
textutil.swap_hexstring(parts[0], width=2),
textutil.swap_hexstring(parts[1], width=2),
textutil.swap_hexstring(parts[2], width=2),
parts[3],
parts[4]
])
def test_swap_hexstring(self):
data = [
['12', 1, '21'],
['12', 2, '12'],
['12', 3, '012'],
['12', 4, '0012'],
['123', 1, '321'],
['123', 2, '2301'],
['123', 3, '123'],
['123', 4, '0123'],
['1234', 1, '4321'],
['1234', 2, '3412'],
['1234', 3, '234001'],
['1234', 4, '1234'],
['abcdef12', 1, '21fedcba'],
['abcdef12', 2, '12efcdab'],
['abcdef12', 3, 'f12cde0ab'],
['abcdef12', 4, 'ef12abcd'],
['aBcdEf12', 1, '21fEdcBa'],
['aBcdEf12', 2, '12EfcdaB'],
['aBcdEf12', 3, 'f12cdE0aB'],
['aBcdEf12', 4, 'Ef12aBcd']
]
for t in data:
self.assertEqual(t[2], textutil.swap_hexstring(t[0], width=t[1]))
def test_swap_hexstring(self):
data = [
['12', 1, '21'],
['12', 2, '12'],
['12', 3, '012'],
['12', 4, '0012'],
['123', 1, '321'],
['123', 2, '2301'],
['123', 3, '123'],
['123', 4, '0123'],
['1234', 1, '4321'],
['1234', 2, '3412'],
['1234', 3, '234001'],
['1234', 4, '1234'],
['abcdef12', 1, '21fedcba'],
['abcdef12', 2, '12efcdab'],
['abcdef12', 3, 'f12cde0ab'],
['abcdef12', 4, 'ef12abcd'],
['aBcdEf12', 1, '21fEdcBa'],
['aBcdEf12', 2, '12EfcdaB'],
['aBcdEf12', 3, 'f12cdE0aB'],
['aBcdEf12', 4, 'Ef12aBcd']
]
for t in data:
self.assertEqual(t[2], textutil.swap_hexstring(t[0], width=t[1]))
