Cookie addition, deletion, modification and exception

cookie Addition, deletion and modification of

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

#  add to cookie
@app.route('/set_cookie')
def set_cookie():
    resp = make_response(' Set up cookie')
    resp.set_cookie('name', 'zhangsan', max_age=60)  #  Set up cookie
    return resp

#  modify cookie, That's reset value
@app.route('/put_cookie')
def set_cookie():
    resp = make_response(' modify cookie')
    resp.set_cookie('name', 'wangwu', max_age=60)  #  Set up cookie
    return resp

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

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

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

session Has been deleted, modified and checked

1. Need to make a bag , Write the key

#  Value can be written freely 
SECRET_KEY = 'ajfijfakjfg'

from flask import Flask, make_response, session

app = Flask(__name__)
#  Call key 
app.config.from_pyfile(settings.py)

#  add to session
@app.route('/set_session')
def set_session():
    session['password'] = 123456
    return 'session Set up the success '

#  modify session, It's also a reset value
@app.route('/set_session')
def set_session():
    session['password'] = 11111
    return 'session Modification successful '

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

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

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

Throw an exception

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

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

#  Capture exception 

@app.errorhandler(404)
def get_error(e):
    return ' Something went wrong '

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

Construction method

@app.route('/page')
def page():
    print(' Page execution ')
    return ' Page execution '
    
@app.before_first_request
def first():
    print(' Execute before page request , Request only once ')
    
@app.before_request
def before():
    print(' Every time you execute ')
    
@app.after_request
def after(resp):
    print(resp)
    resp.status = 404
    print(' The page processing request result reports an error , May not be implemented ')
    return resp
    
@app.teardown_request
def tr(e):
    print(' The page executes after processing the request , Error reporting will also be implemented ')


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