Flask实现websocket

from flask import Flask,request
user_socket_dict = {}
app = Flask(__name__)

@app.route("/conn_ws")
#http协议{'GATEWAY_INTERFACE': 'CGI/1.1', 'SERVER_SOFTWARE': 'gevent/1.3 Python/3.7', 'SCRIPT_NAME': '', 'wsgi.version': (1, 0), 'wsgi.multithread': False, 'wsgi.multiprocess': False, 'wsgi.run_once': False, 'wsgi.url_scheme': 'http', 'wsgi.errors': <
#socket协议{'GATEWAY_INTERFACE': 'CGI/1.1', 'SERVER_SOFTWARE': 'gevent/1.3 Python/3.7', 'SCRIPT_NAME': '', 'wsgi.version': (1, 0), 'wsgi.multithread': False, 'wsgi.multiprocess': False, 'wsgi.run_once': False, 'wsgi.url_scheme': 'http', 'wsgi.errors': <_io.TextIOWrapper name='<stderr>' mode='w' encoding='UTF-8'>, 'SERVER_NAME': '6FBK8EBBBDZ159K', 'SERVER_PORT': '9527', 'REQUEST_METHOD': 'GET', 'PATH_INFO': '/conn_ws', 'QUERY_STRING': '', 'SERVER_PROTOCOL': 'HTTP/1.1', 'REMOTE_ADDR': '127.0.0.1', 'REMOTE_PORT': '62890', 'HTTP_HOST': '127.0.0.1:9527', 'HTTP_CONNECTION': 'keep-alive', 'HTTP_CACHE_CONTROL': 'max-age=0', 'HTTP_UPGRADE_INSECURE_REQUESTS': '1', 'HTTP_USER_AGENT': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36', 'HTTP_ACCEPT': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8', 'HTTP_ACCEPT_ENCODING': 'gzip, deflate, br', 'HTTP_ACCEPT_LANGUAGE': 'zh-CN,zh;q=0.9', 'HTTP_COOKIE': 'session=bb1d56c2-aaa0-4188-aa1b-10920775eb49', 'wsgi.input': <gevent.pywsgi.Input object at 0x0000000003A55948>, 'werkzeug.request': <Request 'http://127.0.0.1:9527/conn_ws' [GET]>}
def ws_app():
    user_socket = request.environ.get("wsgi.websocket")
    msg = user_socket.receive()
    while True:
        print(msg)
        user_socket.send(msg)
if __name__ == '__main__':
    http_serv=WSGIServer(("0.0.0.0",9527),app,handler_class=WebSocketHandler)
    http_serv.serve_forever()

 前端

<script type="application/javascript">
    var ws = new WebSocket("ws://127.0.0.1:9527/conn_ws")
    ws.onmessage = function (messageEvent) {
        console.log(messageEvent.data);
    }
</script>