updated asgi examples to the latest uvicorn

Author: miguelgrinberg

examples/server/asgi/app.py

@@ -2,14 +2,14 @@
 import asyncio
 
 import uvicorn
-from uvicorn.loops.auto import auto_loop_setup
 
 import socketio
 
 sio = socketio.AsyncServer(async_mode='asgi')
 app = socketio.ASGIApp(sio, static_files={
     '/': {'content_type': 'text/html', 'filename': 'app.html'},
 })
+background_task_started = False
 
 
 async def background_task():
@@ -68,6 +68,10 @@ async def disconnect_request(sid):
 
 @sio.on('connect', namespace='/test')
 async def test_connect(sid, environ):
+    global background_task_started
+    if not background_task_started:
+        sio.start_background_task(background_task)
+        background_task_started = True
     await sio.emit('my response', {'data': 'Connected', 'count': 0}, room=sid,
                    namespace='/test')
 
@@ -78,6 +82,4 @@ def test_disconnect(sid):
 
 
 if __name__ == '__main__':
-    loop = auto_loop_setup()
-    sio.start_background_task(background_task)
-    uvicorn.run(app, '127.0.0.1', 5000, loop=loop)
+    uvicorn.run(app, host='127.0.0.1', port=5000)

examples/server/asgi/latency.py

@@ -17,4 +17,4 @@ async def ping(sid):
 
 
 if __name__ == '__main__':
-    uvicorn.run(app, '127.0.0.1', 5000)
+    uvicorn.run(app, host='127.0.0.1', port=5000)

examples/server/asgi/requirements.txt

@@ -1,9 +1,9 @@
 Click==7.0
 h11==0.8.1
-httptools==0.0.11
-python-engineio==3.0.0
--e [email protected]:miguelgrinberg/python-socketio@b214380d056dbbfb08273ac482633254176cb847#egg=python_socketio
+httptools==0.0.13
+python-engineio
+python_socketio
 six==1.11.0
-uvicorn==0.3.21
-uvloop==0.11.3
+uvicorn==0.7.0
+uvloop==0.12.2
 websockets==7.0