Encoding problem

[m0rff]

rasa_nlu expects the request params to be utf-8
When I send a message with german umlauts (e.g. ä ü ö), the message is encoded with cp1252 instead of utf-8 and rasa_nlu fails to parse it.

2017-12-07 10:37:05+0100 [_GenericHTTPChannelProtocol,1,127.0.0.1] Unhandled Error
	Traceback (most recent call last):
	  File "/Users/morth/src/enaptfix-bot/venv/lib/python3.6/site-packages/klein/app.py", line 50, in _call
	    result = f(*args, **kwargs)
	  File "/Users/morth/src/enaptfix-bot/venv/lib/python3.6/site-packages/rasa_nlu/server.py", line 92, in decorated
	    return f(*args, **kwargs)
	  File "/Users/morth/src/enaptfix-bot/venv/lib/python3.6/site-packages/rasa_nlu/server.py", line 77, in decorated
	    return f(*args, **kwargs)
	  File "/Users/morth/src/enaptfix-bot/venv/lib/python3.6/site-packages/twisted/internet/defer.py", line 1532, in unwindGenerator
	    return _inlineCallbacks(None, gen, Deferred())
	--- <exception caught here> ---
	  File "/Users/morth/src/enaptfix-bot/venv/lib/python3.6/site-packages/twisted/internet/defer.py", line 1386, in _inlineCallbacks
	    result = g.send(result)
	  File "/Users/morth/src/enaptfix-bot/venv/lib/python3.6/site-packages/rasa_nlu/server.py", line 133, in parse_get
	    for key, value in request.args.items()}
	  File "/Users/morth/src/enaptfix-bot/venv/lib/python3.6/site-packages/rasa_nlu/server.py", line 133, in <dictcomp>
	    for key, value in request.args.items()}
	builtins.UnicodeDecodeError: 'utf-8' codec can't decode byte 0xfc in position 5: invalid start byte

2017-12-07 10:37:05+0100 [-] "127.0.0.1" - - [07/Dec/2017:09:37:04 +0000] "GET /parse?q=Das%20T\xfcrschloss%20an%20meiner%20Eingangst\xfcr%20ist%20defekt&project=default HTTP/1.1" 500 4214 "-" "axios/0.15.3"