@NessajCN 还是不行，而且会弹出报错（虽然没什么影响）
message handler error
Traceback (most recent call last):
File "C:\Users\86177\AppData\Local\Programs\Python\Python310\lib\site-packages\engineio\server.py", line 622, in _trigger_event
return self.handlers[event](*args)
File "C:\Users\86177\AppData\Local\Programs\Python\Python310\lib\site-packages\socketio\server.py", line 730, in _handle_eio_message
pkt = packet.Packet(encoded_packet=data)
File "C:\Users\86177\AppData\Local\Programs\Python\Python310\lib\site-packages\socketio\packet.py", line 41, in __init__
self.attachment_count = self.decode(encoded_packet)
File "C:\Users\86177\AppData\Local\Programs\Python\Python310\lib\site-packages\socketio\packet.py", line 111, in decode
self.data = self.json.loads(ep)
File "C:\Users\86177\AppData\Local\Programs\Python\Python310\lib\json\__init__.py", line 346, in loads
return _default_decoder.decode(s)
File "C:\Users\86177\AppData\Local\Programs\Python\Python310\lib\json\decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "C:\Users\86177\AppData\Local\Programs\Python\Python310\lib\json\decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

@zhishixiang 又忘记删机密信息了，改个密码先

@NessajCN 已经导入过了，可以直接使用 emit ，忘记打出来了，我放完整源码吧
```
from hashlib import new
from re import T
from time import sleep

import requests
from flask import Flask, sessions, request
import pymysql
import json
from flask_socketio import SocketIO, emit, join_room, leave_room, send

db = pymysql.connect(host="gz-cynosdbmysql-grp-pre3qflf.sql.tencentcdb.com", port=21297, user="autowhitelist",
password="nl6a0j2pcaLDIXcb", database="autowhitelist")
cursor = db.cursor()
app = Flask(__name__)

# 以下是轮询方案，能不用就尽量不用
"""@app.route("/checkNew")
def checkNew():
secret = request.values.get("secret")
newMission = cursor.execute("SELECT * FROM missionList WHERE secret=%s AND isEnd = 0", secret)
print(newMission)
if newMission == 0:
return json.dumps({"status": "0", "msg": "No new mission"})
else:
mission = cursor.fetchone()
id = mission[1]
cursor.execute("UPDATE missionList SET isEnd = 1 WHERE id = %s", id)
db.commit()
return json.dumps({"status": "1", "msg": "New Whitelist", "id": id})"""

"""@app.route("/uploadNew")
def uploadNew():"""

"""@app.route("/checkServer")
def checkServer():
secret = request.values.get("secret")
isReg = cursor.execute("SELECT * FROM registerList WHERE secret=%s", secret)
if isReg == 1:
return ("Success")
else:
return ("Server not exist")
"""

app = Flask(__name__)
app.config['SECRET_KEY'] = 'secret!'
socketio = SocketIO(app)
tokenList = {}


@app.route("/test")
def testConnect():
sid = tokenList["114514"]
socketio.emit('newMission', {'from': 'server'}, namespace="newMission", to=sid)
return "success"


@socketio.on('register')
def register(data):
print("服务器%s 尝试注册" % data["secret"])
emit('register', {"token": "1919810"})
print("注册成功，token 为%s" % "1919810")
sid = request.sid
join_room("mainRoom")
tokenList["114514"] = sid


"""@socketio.on('message')
def message(data):
print(data) # {'from': 'client'}
emit('response', {'from': 'server'})
sleep(5)
emit('response', "exit")"""

if __name__ == '__main__':
socketio.run(app, debug=True, host='127.0.0.1', port=8090)
```

@NessajCN 才发现服务端和客户端代码写反了，得换过来看

@BeautifulSoup 服务端安装了 gevent-websocket 库，可以使用 websocket ，客户端用的是 python websocket 库

希望能出详细使用教程

竟然有这么好的技术，我也是开 mc 服的，支持一下

@titanium98118 甲骨文云好像对信用卡有要求，国内的卡能用吗

@christin 还能推荐几家吗

@christin 这两个不是说有一年吗，怎么突然就几个月了

@Y29tL2gwd2Fy 这下同步延期更新了

@lisongeee 以前学 js 一直是 var ，最近没怎么补 js 的知识。腾讯云 serverless 有学生优惠，一年才 20 几，打算嫖完再换别家。

@doublleft 那条回复竟然没隐藏，看来得改改了

@cy1027 什么问题

@learningman 以前写 flask 都是在内网跑的，没怎么注意防注入，看来以后得开始研究了

@learningman 你删了这个回复吧，点进去还能看到密码

@learningman 已经进行防注入处理了

@learningman 研究了一会，看不懂，已经直接 reset hard 了

@learningman 已经说是烂代码了┑(￣Д ￣)┍