Consul with both Vault binary data and a nil/None value won't back up.

[wwalker]

This is very like issue #41. If we run without the -b, we get:

wwalker@hatter:~/git/consulate (master *$%=)$ consulate --api-host tst-log3 --datacenter qa kv backup
Traceback (most recent call last):
File "/home/wwalker/.virtualenvs/consulate/bin/consulate", line 9, in
load_entry_point('consulate==0.6.0', 'console_scripts', 'consulate')()
File "build/bdist.linux-x86_64/egg/consulate/cli.py", line 469, in main
File "build/bdist.linux-x86_64/egg/consulate/cli.py", line 216, in kv_backup
File "/usr/lib64/python2.7/json/init.py", line 243, in dumps
return _default_encoder.encode(obj)
File "/usr/lib64/python2.7/json/encoder.py", line 207, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/usr/lib64/python2.7/json/encoder.py", line 270, in iterencode
return _iterencode(o, 0)
UnicodeDecodeError: 'utf8' codec can't decode byte 0x94 in position 6: invalid start byte

If we run with -b we fail with:

wwalker@hatter:~/git/consulate (master $%=)$ consulate --api-host tst-log3 --datacenter qa kv backup -b
Traceback (most recent call last):
File "/home/wwalker/.virtualenvs/consulate/bin/consulate", line 9, in
load_entry_point('consulate==0.6.0', 'console_scripts', 'consulate')()
File "build/bdist.linux-x86_64/egg/consulate/cli.py", line 469, in main
File "build/bdist.linux-x86_64/egg/consulate/cli.py", line 214, in kv_backup
File "/usr/lib64/python2.7/base64.py", line 53, in b64encode
encoded = binascii.b2a_base64(s)[:-1]
TypeError: must be string or buffer, not None

We have a key with a None value.

[gmr]

Thanks for the fix, I'll try and get a 0.6.1 out soon

[jantman]

For me, this appears fixed on python2 only. It works fine under 2.7.10, using current master (3c6ce3c). However, if I run the same kv backup command (with --base64) under python 3.4, I get:

Traceback (most recent call last):
  File "/tmp/jantman/consulate3/bin/consulate", line 9, in <module>
    load_entry_point('consulate==0.6.0', 'console_scripts', 'consulate')()
  File "/tmp/jantman/consulate3/src/consulate/consulate/cli.py", line 469, in main
    KV_ACTIONS[args.action](consul, args)
  File "/tmp/jantman/consulate3/src/consulate/consulate/cli.py", line 212, in kv_backup
    for k,f,v in records]
  File "/tmp/jantman/consulate3/src/consulate/consulate/cli.py", line 212, in <listcomp>
    for k,f,v in records]
  File "/tmp/jantman/consulate3/lib/python3.4/base64.py", line 62, in b64encode
    encoded = binascii.b2a_base64(s)[:-1]
TypeError: 'NoneType' does not support the buffer interface