Implement stricter input

[openwisp]

Implement stricter input

[acoul]

unfortunately this change breaks https://github.com/coxley/aspath_graph which I use to convert BGP txt dump to json

[nemesifier]

@acoul: upgrading client code is very easy, it just requires to specify if the input is a url, file or data.

See the changes in the tests to understand what I mean: aa81003

One question, I don't understand what do you mean for breaking aspath_graph, I thought that package did not use netdiff.

[acoul]

this is the error I am getting:

[ERROR 2017-09-21 15:06:26,309] module: contextmanagers, process: 20937, thread: -1213524224
Failed to perform update on <Topology: AWMN - NetJSON NetworkGraph>
Traceback (most recent call last):
File "/awmn/.local/lib/python3.4/site-packages/django_netjsongraph/contextmanagers.py", line 10, in log_failure
yield
File "/awmn/.local/lib/python3.4/site-packages/django_netjsongraph/base/topology.py", line 305, in update_all
topology.update()
File "/awmn/.local/lib/python3.4/site-packages/django_netjsongraph/base/topology.py", line 185, in update
diff = self.diff(data)
File "/awmn/.local/lib/python3.4/site-packages/django_netjsongraph/base/topology.py", line 133, in diff
latest = self.get_topology_data(data)
File "/awmn/.local/lib/python3.4/site-packages/django_netjsongraph/base/topology.py", line 114, in get_topology_data
latest = self.parser_class(data, timeout=TIMEOUT)
File "/awmn/.local/lib/python3.4/site-packages/netdiff/parsers/base.py", line 56, in init
self.original_data = self.to_python(data)
File "/awmn/.local/lib/python3.4/site-packages/netdiff/parsers/base.py", line 89, in to_python
raise ConversionException('Could not recognize format', data=data)
netdiff.exceptions.ConversionException: Could not recognize format

[acoul]

I am not sure if this issue should be reported here or @ https://github.com/netjson/django-netjsongraph

FWIW I was able to get going again by reverting this: 42484a9

I simply updated the .local/lib/python3.4/site-packages/netdiff/parsers/base.py by hand

[nemesifier]

If you don't want issues, stick to django-netjsongraph 0.3.4 and netdiff 0.4.8.

[acoul]

the above netdiff 0.5.0 revert actually produces a 0.4.8 IMHO

I was just following this: https://github.com/netjson/django-netjsongraph/blob/master/requirements.txt

netdiff>=0.5.0,<=6.0

[nemesifier]

yes, is correct

[acoul]

this was my bad: openwisp/django-netjsongraph#57

all seem to work as they should. sorry for the noise.

Edit: to clarify things, aspath_graph is working fine

[nemesifier]

@acoul: thx for the update!