03 exception handling, state keeping, request hook -- 04 large project structure and blueprint

1.session and cookie The difference between

cookie The shortcomings of ： Data can be modified in series , Customers can make changes at will
solve ：cookie adopt session Modify the client , And it's encrypted

2.Cookie The implementation of the

2.1.cookie An increase in

from flask import Flask,response

app=Flask(__name__)  #  Instantiate data 

#  Define a function 
@app.route('/set_cookie')
def set_cookie():
#  The response object  make_response  The value returned 
	resp=make_response(' Set up cookie')
	#  Set up cookie max_age cookie The validity of the 
	resp.set_cookie('name','zhangsan',max_age=60)
	#  Response return 
	return resp

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

result ：

Display the time of validity, etc ： What I set up is 60s

2.2.cookie Investigation of

from flask import Flask

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

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

2.3cookie The deletion of

#  Import flask package 
from flask import Flask
#  Instantiate 
app=Flask(__name__)
#  Define routes 
@app.route('/del_cookie')
#  Define a cookie Function of 
def del_cookie():
	resp=make_response(' Delete cookie')
	resp.del_cookie('name')
	
	return resp

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

1. Introduction and use of blueprints

The concept of blueprint ：

Blueprint is an extension of existing Flask The method of applying structure , It also provides a way to combine views with similar functions , In short, it is equivalent to the air conditioner The remote control

Steps of blueprint ( The three step )：

One : Create a blueprint object

Two ： Operate on the created blueprint object

from flask import Flask,Blueprint,jsonify

from flask_restful import Api,Resource,reqparse

from models.model import *

user_db=Blueprint('user_db',__name__,url_prefix='/user')

api=Api(user_db)


class HomeView(Resource):
    def get(self):
			...
	def post(self):
		...
	def put(self):
		...
	def delete(self):
		...
api.add_resource(HomeView,'/home')

3、 ... and ： Register the blueprint object on the application object