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

gns3server/handlers/api/compute/project_handler.py

@@ -193,7 +193,7 @@ class ProjectHandler:
                     msg = json.dumps({"action": action, "event": msg}, sort_keys=True)
                 log.debug("Send notification: %s", msg)
                 await response.write(("{}\n".format(msg)).encode("utf-8"))
-            except asyncio.futures.TimeoutError:
+            except asyncio.TimeoutError:
                 await response.write("{}\n".format(json.dumps(ProjectHandler._getPingMessage())).encode("utf-8"))
         project.stop_listen_queue(queue)
         if project.id in ProjectHandler._notifications_listening:

gns3server/notification_queue.py

@@ -42,7 +42,7 @@ class NotificationQueue(asyncio.Queue):
 
         try:
             (action, msg, kwargs) = await asyncio.wait_for(super().get(), timeout)
-        except asyncio.futures.TimeoutError:
+        except asyncio.TimeoutError:
             return ("ping", PingStats.get(), {})
         return (action, msg, kwargs)
 

gns3server/utils/asyncio/__init__.py

@@ -22,8 +22,6 @@ import sys
 import os
 import threading
 
-from asyncio.futures import CancelledError
-
 
 async def wait_run_in_executor(func, *args, **kwargs):
     """
@@ -56,7 +54,7 @@ async def cancellable_wait_run_in_executor(func, *args, **kwargs):
     kwargs['stopped_event'] = stopped_event
     try:
         await wait_run_in_executor(func, *args, **kwargs)
-    except CancelledError:
+    except asyncio.CancelledError:
         stopped_event.set()
 
 

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})