add tornado

stream.py

@@ -2,7 +2,6 @@
 import streamlink
 import tornado.web
 import tornado.routing
-import urllib.parse
 
 providers = {}
 providers["nrk"] = "https://tv.nrk.no"
@@ -12,7 +11,7 @@ providers["youtube"] = "https://youtu.be"
 class MainHandler(tornado.web.RequestHandler):
     def get(self):
         provider = self.get_query_argument("provider", None)
-        if provider in providers:
+        if provider is not None and provider in providers:
             endpoint = None
             src = providers[provider] + self.request.uri
             try: