我正在尝试像这样在我的React客户端和SocketIO连接之间建立连接。

socket = SocketIO(app,cors_allowed_origins="*")

@socket.on('test')
def test(data):
    print("test")
    print(data)

和客户端连接

 //wrapped in a async function

const socket = openSocket('http://localhost:5000');

export const sendMessage = (user,content,attachments) =>{
    const data = {
        sender: user,content: content,attachments: attachments,timeStamp: Date.now()
    }
    try{
        const res = socket.emit('test',data)
        return stringify(res)
    }catch(exception){
        return exception
    }

}

在服务器端，我会收到200响应，就像连接设置正确一样，但是在客户端，我会收到此错误

886313e1-3b8a-5372-9b90-0c9aee199e5d:1 access to 
XMLHttpRequest at 'http://localhost:5000/socket.io/?EIO=3&transport=polling&t=MvQD3QE' from origin 'http://localhost:3000' has been blocked by CORS policy: The value of the 'access-control-allow-origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.

如果我删除cors_allowed_origins="*"，则在服务器端会得到400，但是在客户端总是会出现错误。