我建立了协程WebSocket链接，但只能在此协程内发送消息，我的问题是如何在协程之外使用当前客户端发送消息
#!/usr/bin/env python3
import os,asyncio , threading,dotenv, aiohttp ,time,serial_asyncio,aiofiles
from aiohttp import web, MultipartWriter
from aiohttp.web import middleware
temple="""
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
var _Connection;
var link="ws://"+location.host+"/ws";
window.onload = function () {setTimeout( ini_ws , 400);}
function ini_ws()
{
_Connection = new WebSocket( link);
_Connection.onerror = function (error){document.getElementById('_link').value="Link Broken"; document.getElementById('_link').style.backgroundColor ="#FFA500"; }
_Connection.close = function (error) {document.getElementById('_link').value="Disconnected"; document.getElementById('_link').style.backgroundColor ="#FFE4E1";} //gray
_Connection.onopen = function (evt) {document.getElementById('_link').value="Connected"; document.getElementById('_link').style.backgroundColor ="#7FFF00";_Connection.send('Hello web server on Firefly' ); }
_Connection.onmessage = function(INCOME){document.getElementById('recieve_dats').value+=INCOME.data+'\n'; }
setInterval(check_WS, 500);
}
function check_WS(){
if( _Connection.readyState == 3 ) {document.getElementById('_link').style.backgroundColor ="#FFA500"; ini_ws();}
else if( _Connection.readyState == 0 ) {document.getElementById('_link').style.backgroundColor ="#DC143C"; }
else if( _Connection.readyState == 2 ) {document.getElementById('_link').style.backgroundColor ="#FF0000"; }
}
function clear_console() {document.getElementById("recieve_dats").value=""}
function send_command(){
var v=document.getElementById("send_command_value").value;
if(v) _Connection.send(v )
document.getElementById("send_command_value").value="";
}
</script>
</head>
<body>
<h2>websocket link</h2>
<input type="button" id="_link" onclick="ini_ws();return false;" name="" value="Disconnected" >
<h2>incoming data</h2>
<div>
<textarea id="recieve_dats" > </textarea>
<p>Console in <button onclick="clear_console();return false;" >Clear Console</button> </p>
</div>
<h2>send data to server</h2>
<div >
<p>Console out <button onclick="send_command();return false;" >Send Command</button> </p>
<input id="send_command_value" type="text" >
</div>
</body>
</html>
"""
INDEX_File=os.path.join(os.path.dirname(__file__), 'ws.html');
GlobalWS=GlobalRequest=None
async def websocket_handler(request):
print("websocket_handler");
ws =web.WebSocketResponse()
await ws.prepare(request)
#request.app["websockets"].add(ws)
GlobalWS=ws
GlobalRequest=request
async for msg in ws:
if msg.type == aiohttp.WSMsgType.TEXT:
Income=msg.data;
print(Income)
await ws.send_str("got your message website")
#request.app["GlobalWS"]=None;#.remove(ws)
#request.app['websockets'].remove(ws)
return ws
async def websockets_clear(app):
print("websockets_clear");
for ws in app['websockets']:
await ws.close()
app['websockets'].clear()
async def handle_index_page(request):
async with aiofiles.open(INDEX_File, mode='r') as index_file:
index_contents = await index_file.read()
return web.Response(text=index_contents, content_type='text/html')#return web.Response(text=temple, content_type='text/html')
async def send_ws(s):
ws = web.WebSocketResponse()
await ws.prepare(GlobalRequest)
await ws.send_str(s)
async def serialRead(f):
print("send serialRead")
while True:
print("sending......")
await send_ws("helo web site ")
await asyncio.sleep(1/f);
async def setup_server(loop, address, port):
app = web.Application(loop=loop)
app.router.add_route('GET', "/", handle_index_page)
app.router.add_route('GET', '/ws', websocket_handler)
app["GlobalWS"] = set()
app.on_shutdown.append(websockets_clear)
app["threads"] = threading.Event()
print("setup_server done");
return await loop.create_server(app.make_handler(), address, port)
def server_begin():
ip='0.0.0.0';port=8080
loop = asyncio.get_event_loop()
asyncio.run_coroutine_threadsafe(serialRead(1) , loop)
asyncio.run_coroutine_threadsafe(setup_server(loop, ip,port ), loop)
#coro = serial_asyncio.create_serial_connection(loop, Output, '/dev/ttyUSB0', baudrate=115200)
print("Server ready!",ip,port)
try:
loop.run_forever()
except KeyboardInterrupt:
print("Shutting Down!")
loop.close()
if __name__ == '__main__':
server_begin()
此代码停止在第send_ws(s):行进行响应
但我评论那条线，它开始起作用
我希望定期向当前客户端发送消息，但不会发送任何消息