post代理返回的json为空

[leyandh]

from flask import Flask, request
import json

app = Flask(name)

'''监听端口，获取QQ信息'''
@app.route('/', methods=["POST"])
def post_data():

print( request.get_json().get('message_type'))

if name == 'main':
app.run(debug=True, host='127.0.0.1', port=5701)

发消息给机器人输出json

但是输出结果为None

[leyandh]

request.get_data().get('message_type')