Python Flask框架

根据flask文档 https://dormousehole.readthedocs.io/en/latest/tutorial/index.html

建立的一个demo系统

 启动flask服务命令

set FLASK_APP=flaskr
set FLASK_ENV=development
flask run

flask run启动后，只能本地的机子能访问。如果要让其他电脑也访问，需要 https://dormousehole.readthedocs.io/en/latest/deploying/index.html

然后在浏览器输入 http://127.0.0.1:5000/ 访问

flask学习笔记

import hashlib
from flask import Flask, request

app = Flask(__name__)   # __name__ 当前模块名称

@app.route('/')   # 绑定路径（默认根目录），默认get请求
def hello():
    return 'Welcome to flask framework'

@app.route('/page1', methods=['get'])   # 指定地址和请求
def hello1():
    return 'Welcome to flask framework get page'

@app.route('/page2', methods=['post'])   # 不带参数的post请求
def hello2():
    return 'Welcome to flask framework post page'

@app.route('/page3', methods=['get'])   # 带参数的get请求
def hello3():
    username = request.args.get('username')
    password = request.args.get('password')
    if username == 'admin' and password == 'admin':
        return f'Welcome to flask framework {username}'
    else:
        return 'Incorrect username or password'

@app.route('/page4', methods=['post'])   # 带参数的post请求
def hello4():
    username = request.form.get('username')
    password = request.form.get('password')
    if username == 'admin' and password == 'admin':
        return f'Welcome to flask framework {username}'
    else:
        return 'Incorrect username or password'

def md5(args):
    md5_value = hashlib.md5(str(args).encode('utf-8')).hexdigest()
    return md5_value

@app.route('/page5', methods=['post'])
def hello5():        # 参数加密，前段发送请求时也要加密
    username = request.form.get('username')
    password = request.form.get('password')
    md5_user = md5('admin')
    if username == md5_user and password == 'admin':
        return f'hello 加密后的admin： {md5_user}'
    else:
        return 'Incorrect 加密后的 username or 未加密的 password'

@app.route('/page6', methods=['get'])
def hello6():
    header = request.headers.get('User-Agent')
    if 'Mozilla' in header:
        return f'已经带上请求头的请求{header}'
    else:
        return '请求失败，没有传入请求头'

# 启动服务
if __name__ == '__main__':
    app.run()