Rendering a port traffic graph results in a UnicodeEncodeError

[Morten Brekkevold]

Attempting to render a traffic graph for a port that has non-ASCII characters in its ifalias will result in the following traceback:

Traceback (most recent call last):

  File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 109, in get_response
    response = callback(request, *callback_args, **callback_kwargs)

  File "/usr/lib/python2.7/dist-packages/nav/web/ipdevinfo/views.py", line 531, in port_counter_graph
    url = get_interface_counter_graph_url(port, timeframe, kind)

  File "/usr/lib/python2.7/dist-packages/nav/web/ipdevinfo/utils.py", line 426, in get_interface_counter_graph_url
    shortname=interface.netbox.get_short_sysname(),

UnicodeEncodeError: 'ascii' codec can't encode character u'\xd8' in position 21: ordinal not in range(128)

SNMP is not defined for non-ASCII data, but it can nontheless often be configured on the CLI side, which can result in this.

[Morten Brekkevold (mbrekkevold)]

fix here: https://nav.uninett.no/hg/stable/rev/baf343e40135