基础安装

# apt-get update
# apt-get install python3-pip python3 python3-gevent

基础的一个示例

#!/usr/bin/python3
# -*- coding: utf-8 -*-
# 2021-11-02 
# Dasmz  

import flask

app = flask.Flask(__name__)

@app.route('/', methods=['GET'])
def index():
        return '<p>Hello World!</p>'

if __name__ == "__main__":
    app.run(host='0.0.0.0',port=41012) 

# 服务端 
root@cafe560b8380:~# python3 1102-1634.py 
 * Serving Flask app '1102-1634' (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on all addresses.
   WARNING: This is a development server. Do not use it in a production deployment.
 * Running on http://172.17.0.3:41012/ (Press CTRL+C to quit)
x.×.12.211 - - [02/Nov/2021 08:34:42] "GET / HTTP/1.1" 200 -
x.x.12.211 - - [02/Nov/2021 08:34:42] "GET /favicon.ico HTTP/1.1" 404 -
x.x.12.211 - - [02/Nov/2021 08:35:16] "GET / HTTP/1.1" 200 -

# 客户端，验证请求
curl http://198.*.*.196:41012/
<p>Hello World!</p>

#!/usr/bin/python3
# -*- coding: utf-8 -*-
# 2021-11-02 
# Dasmz

import flask

app = flask.Flask(__name__)

# 主路由
@app.route('/', methods=['GET'])
def index():
        return '<p>Hello World!</p>\n'

# 增加一个名称的路径参数
@app.route('/home/<name>', methods=['GET'])
def home(name):
        return '<p>Hello World!<br><br> Hi, <b>{}</b>.</p>\n'.format(name)
        
if __name__ == "__main__":
    app.run(host='0.0.0.0',port=41012) 



#  curl http://IPv4:41012/
#  curl http://IPv4:41012/home/david
#  curl http://IPv4:41012/home/J.J.HarrySon

#!/usr/bin/python3
# -*- coding: utf-8 -*-
# 2021-11-02 
# Dasmz

import flask

app = flask.Flask(__name__)

# 主路由
@app.route('/', methods=['GET'])
def index():
        return '<p>Hello World!</p>\n'

# 增加一个名称的路径参数
@app.route('/home/<name>', methods=['GET'])
def home(name):
        return '<p>Hello World!<br><br> Hi, <b>{}</b>.</p>\n'.format(name)

# 增加API，返回客户端的UA
@app.route('/API/getUA', methods=['GET'])
def getUserAgent():
        return '{}\n'.format(flask.request.headers.get('User-Agent'))
        
if __name__ == "__main__":
    app.run(host='0.0.0.0',port=41012) 



#  curl http://IPv4:41012/
#  curl http://IPv4:41012/home/david
#  curl http://IPv4:41012/home/J.J.HarrySon
#  curl http://IPv4:41012/API/getUA