cookie的增删改查

from flask import Flask, make_response, request
app = Flask(__name__)

# 添加cookie
@app.route('/set_cookie')
def set_cookie():
    resp = make_response('设置cookie')
    resp.set_cookie('name', 'zhangsan', max_age=60)  # 设置cookie
    return resp

# 修改cookie，也就是重置value
@app.route('/put_cookie')
def set_cookie():
    resp = make_response('修改cookie')
    resp.set_cookie('name', 'wangwu', max_age=60)  # 设置cookie
    return resp

# 获取cookie
@app.route('/get_cookie')
def get_cookie():
    name = request.cookies.get('name')
    print(name)
    resp = make_response('获取cookie')
    return resp

# 删除cookie
@app.route('/del_cookie')
def del_cookie():
    resp = make_response('删除cookie')
    resp.delete_cookie('name')
    return resp

if __name__ == '__main__':
    app.run()

session的曾删改查

1. 需要制作一个包，写入密钥

# 值可以随便写
SECRET_KEY = 'ajfijfakjfg'

from flask import Flask, make_response, session

app = Flask(__name__)
# 调用密钥
app.config.from_pyfile(settings.py)

# 添加session
@app.route('/set_session')
def set_session():
    session['password'] = 123456
    return 'session设置成功'

# 修改session，也是重置value
@app.route('/set_session')
def set_session():
    session['password'] = 11111
    return 'session修改成功'

# 获取session
@app.route('/get_session')
def get_session():
    pwd = session.get('password')
    return f'获取到的key:{
      pwd}'

# 删除session
@app.route('/del_session')
def del_session():
    resp = make_response('删除session')
    resp.delete_cookie('session')
    return resp

if __name__ == '__main__':
    print(app.config)
    app.run()    

抛出异常

from flask import Flask, abort
app = Flask(__name__)

@app.route('/error')
def error():
    abort(404)

# 捕获异常

@app.errorhandler(404)
def get_error(e):
    return '出错了'

if __name__ == '__main__':
    app.run()    

构造方法

@app.route('/page')
def page():
    print('页面执行')
    return '页面执行'
    
@app.before_first_request
def first():
    print('页面请求前执行，只请求一次')
    
@app.before_request
def before():
    print('每次执行')
    
@app.after_request
def after(resp):
    print(resp)
    resp.status = 404
    print('页面处理请求结果报错，可能不会在执行')
    return resp
    
@app.teardown_request
def tr(e):
    print('页面处理请求后执行，报错也会执行')


if __name__ == '__main__':
    app.run()