Use flask to test whether the port is open in the firewall

$$WithFLASKmeasuredalowerendopeninginthe\; anti-firewallisnoopendischargeofaskingquestions$$

#coding: utf8    

# 从flask框架中导入Flask类
from flask import Flask

# 传入__name__初始化一个Flask实例
app = Flask(__name__)

# app.route装饰器映射URL和执行的函数。这个设置将根URL映射到了hello_world函数上
@app.route('/')
def hello_world():
    return 'Hello World!'

if __name__ == '__main__':
    # 运行本项目，host=0.0.0.0可以让其他电脑也能访问到该网站，port指定访问的端口。默认的host是127.0.0.1，port为5000
    app.run(host='0.0.0.0',port=9000)

vim flask_test_socket.py

python flask_test_socket.py