无法使用 Flask 连接到 SocketIO

Question

我正在尝试创建一个使用 SocketIO 的应用程序，我正在使用 Flask-socketio 并使用 Socket.io Client Tool 来测试套接字的连接。我已经按照 flask-socketio 的文档中所示完成了它，但我无法连接套接字。连接时出现以下错误：

客户端错误：

服务器端错误：

代码：

app = Flask(__name__)
CORS(app)
app.config.from_object(Config)
socketio = SocketIO(app)

jwt = JWTManager(app)
db = MongoEngine(app)
api = Api(app)


@app.route('/')
def messageReceived(methods=None):
    if methods is None:
        methods = ['GET', 'POST']
    print('message was received!!!')


# @socketio.on('connect', namespace='/test')
# def test_connect():
#     print('Client connected')
#
#
# @socketio.on('disconnect', namespace='/test')
# def test_disconnect():
#     print('Client disconnected')


@socketio.on('my event')
def handle_my_custom_event(json, methods=None):
    if methods is None:
        methods = ['GET', 'POST']
    print('received my event: ' + str(json))
    socketio.emit('my response', json, callback=messageReceived)


if __name__ == '__main__':
    app.run(debug=True, host='localhost', port=5000)
    socketio.run(app, logger=True, engineio_logger=True)

Answer 1

Flask-SocketIO 服务器默认执行同源策略。您需要将 Socket.IO 测试工具的来源配置为允许的来源。例如：

socketio = SocketIO(app, cors_allowed_origins="https://amritb.github.io")

无法使用 Flask 连接到 SocketIO

Cannot connect to SocketIO using Flask

python

flask

socket.io

flask-socketio