Use asyncio.ensure_future() instead of asyncio.async() with conservative approach to support Python < 3.4.4. Fixes https://github.com/GNS3/gns3-gui/issues/2566

gns3server/compute/base_manager.py

@@ -30,6 +30,7 @@ log = logging.getLogger(__name__)
 
 from uuid import UUID, uuid4
 from gns3server.utils.interfaces import is_interface_up
+from gns3server.utils.asyncio import asyncio_ensure_future
 from ..config import Config
 from ..utils.asyncio import wait_run_in_executor
 from ..utils import force_unix_path
@@ -127,7 +128,7 @@ class BaseManager:
 
         tasks = []
         for node_id in self._nodes.keys():
-            tasks.append(asyncio.async(self.close_node(node_id)))
+            tasks.append(asyncio_ensure_future(self.close_node(node_id)))
 
         if tasks:
             done, _ = yield from asyncio.wait(tasks)

gns3server/compute/docker/docker_vm.py

@@ -29,6 +29,7 @@ import os
 from gns3server.utils.asyncio.telnet_server import AsyncioTelnetServer
 from gns3server.utils.asyncio.raw_command_server import AsyncioRawCommandServer
 from gns3server.utils.asyncio import wait_for_file_creation
+from gns3server.utils.asyncio import asyncio_ensure_future
 from gns3server.utils.get_resource import get_resource
 
 from gns3server.ubridge.ubridge_error import UbridgeError, UbridgeNamespaceError
@@ -567,7 +568,7 @@ class DockerVM(BaseNode):
 
         output_stream.feed_data(self.name.encode() + b" console is now available... Press RETURN to get started.\r\n")
 
-        asyncio.async(self._read_console_output(self._console_websocket, output_stream))
+        asyncio_ensure_future(self._read_console_output(self._console_websocket, output_stream))
 
     @asyncio.coroutine
     def _read_console_output(self, ws, out):

gns3server/compute/dynamips/__init__.py

@@ -36,6 +36,7 @@ log = logging.getLogger(__name__)
 from gns3server.utils.interfaces import interfaces, is_interface_up
 from gns3server.utils.asyncio import wait_run_in_executor
 from gns3server.utils import parse_version
+from gns3server.utils.asyncio import asyncio_ensure_future
 from uuid import uuid4
 from ..base_manager import BaseManager
 from ..port_manager import PortManager
@@ -172,7 +173,7 @@ class Dynamips(BaseManager):
 
         tasks = []
         for device in self._devices.values():
-            tasks.append(asyncio.async(device.hypervisor.stop()))
+            tasks.append(asyncio_ensure_future(device.hypervisor.stop()))
 
         if tasks:
             done, _ = yield from asyncio.wait(tasks)
@@ -196,7 +197,7 @@ class Dynamips(BaseManager):
         tasks = []
         for device in self._devices.values():
             if device.project.id == project.id:
-                tasks.append(asyncio.async(device.delete()))
+                tasks.append(asyncio_ensure_future(device.delete()))
 
         if tasks:
             done, _ = yield from asyncio.wait(tasks)

gns3server/compute/dynamips/nodes/router.py

@@ -40,7 +40,7 @@ from ..nios.nio_udp import NIOUDP
 
 
 from gns3server.utils.file_watcher import FileWatcher
-from gns3server.utils.asyncio import wait_run_in_executor, monitor_process
+from gns3server.utils.asyncio import wait_run_in_executor, monitor_process, asyncio_ensure_future
 from gns3server.utils.images import md5sum
 
 
@@ -196,7 +196,7 @@ class Router(BaseNode):
         """
         Called when the NVRAM file has changed
         """
-        asyncio.async(self.save_configs())
+        asyncio_ensure_future(self.save_configs())
 
     @property
     def dynamips_id(self):

gns3server/compute/project.py

@@ -29,7 +29,7 @@ from uuid import UUID, uuid4
 from .port_manager import PortManager
 from .notification_manager import NotificationManager
 from ..config import Config
-from ..utils.asyncio import wait_run_in_executor
+from ..utils.asyncio import wait_run_in_executor, asyncio_ensure_future
 from ..utils.path import check_path_allowed, get_default_project_directory
 
 import logging
@@ -346,7 +346,7 @@ class Project:
 
         tasks = []
         for node in self._nodes:
-            tasks.append(asyncio.async(node.manager.close_node(node.id)))
+            tasks.append(asyncio_ensure_future(node.manager.close_node(node.id)))
 
         if tasks:
             done, _ = yield from asyncio.wait(tasks)

gns3server/compute/vmware/__init__.py

@@ -32,6 +32,7 @@ import shlex
 from collections import OrderedDict
 from gns3server.utils.interfaces import interfaces
 from gns3server.utils.asyncio import subprocess_check_output
+from gns3server.utils.asyncio import asyncio_ensure_future
 from gns3server.utils import parse_version
 
 log = logging.getLogger(__name__)
@@ -738,4 +739,4 @@ if __name__ == '__main__':
     loop = asyncio.get_event_loop()
     vmware = VMware.instance()
     print("=> Check version")
-    loop.run_until_complete(asyncio.async(vmware.check_vmware_version()))
+    loop.run_until_complete(asyncio_ensure_future(vmware.check_vmware_version()))