Python3.8 support. Ref https://github.com/GNS3/gns3-gui/issues/2895

gns3server/web/route.py

@@ -20,13 +20,10 @@ import json
 import urllib
 import asyncio
 import aiohttp
-import logging
 import traceback
 import jsonschema
 import jsonschema.exceptions
 
-log = logging.getLogger(__name__)
-
 from ..compute.error import NodeError, ImageMissingError
 from ..controller.controller_error import ControllerError
 from ..ubridge.ubridge_error import UbridgeError
@@ -36,6 +33,10 @@ from ..crash_report import CrashReport
 from ..config import Config
 
 
+import logging
+log = logging.getLogger(__name__)
+
+
 async def parse_request(request, input_schema, raw):
     """Parse body of request and raise HTTP errors in case of problems"""
 
@@ -217,7 +218,7 @@ class Route(object):
                     response = Response(request=request, route=route)
                     response.set_status(409)
                     response.json({"message": str(e), "status": 409, "image": e.image, "exception": e.__class__.__name__})
-                except asyncio.futures.CancelledError:
+                except asyncio.CancelledError:
                     response = Response(request=request, route=route)
                     response.set_status(408)
                     response.json({"message": "Request canceled", "status": 408})