问题是前端http://127.0.0.1:5000/页面报错是：

socket.io.js:7370 WebSocket connection to 'ws://127.0.0.1:5000/socket.io/?EIO=3&transport=websocket&sid=fae5fcea9cd444a0ad4edae4ec3c5edc' failed: Error during WebSocket handshake: Unexpected response code: 400

下面是详细的现场：

app.py

def background_stuff(): """ Let's do it a bit cleaner """ socketio.emit('message', {'data': 'This is data', 'time': open('job.log').readlines()}, namespace='/test') @app.route('/') def index(): global thread if thread is None: thread = Thread(target=background_stuff) thread.start() return render_template('index.html')

前端templates/index.html：

启动方式：

gunicorn --worker-class=gevent -w 4 -b 127.0.0.1:5000 app:app