Flask application case

demand

1. establish app, And use the configuration file to configure mysql
2. Create a apps Catalog , Create a... Inside users Catalog ,users Create under directory user The blueprint , And register to the app
3. by user Blueprint configuration routing ; Native route /info return info.html; restful api route /user/mobile return json data .
4. by app Configure cross domain （ Use flask_cors）

Case code

1. app.py

from flask import Flask
from flask import request, session, current_app, g
from flask_restful import Api, Resource
from flask_sqlalchemy import SQLAlchemy
from apps.users.user_app import user_app
from apps.users import models
from flask_cors import CORS

app = Flask(__name__)
#  To configure app
app.config.from_pyfile("settings.py")
#  Initialize database connection 
db = SQLAlchemy(app)

# api Interface ,  The blueprint has its own api object 
api = Api(app)

#  Registered blueprint ,  Blueprints are extended applications , Internal routes will also be put into url_map
app.register_blueprint(user_app)


if __name__ == "__main__":
    print("xxx:", app.url_map)
    #  Configure cross domain ,  Tested 
    CORS(app, supports_credentials=True, 
    origins=["http://localhost:8080",], 
    methods=["GET", "POST", "PUT", "DELETE", "OPTIONS"], 
    allow_headers=["x-requested-with", 'content-type', 'authorization', "author"],
    expose_headers="*")

    app.run(host="localhost", port=5000, debug=True)

2. user_app.py

from flask import request, render_template
from flask import Blueprint
from flask import jsonify

user_app = Blueprint("user", __name__, 
static_folder="static/users",  #  There is no way to access the static file for the time being 
template_folder="templates/users")


@user_app.route("/info", methods=["GET", "POST"], endpoint="userInfo")
def userInfo():
    if request.method == "GET":
        return render_template("users/info.html")

    else:
        return " No page "


from flask_restful import Api, Resource
#  Instantiate blueprint api object , add to restful api
api = Api(user_app)

class UserResource(Resource):
    def get(self):
        res = jsonify({
    
            "code": 200,
            "msg": "1733532..."
        })
        return res

api.add_resource(UserResource, "/user/mobile")

3. manage.py

from app import app, db
from app import user_app
from flask_migrate import Migrate, MigrateCommand
from flask_script import Manager

migrate = Migrate(app, db)

manager = Manager(app)
manager.add_command("db", MigrateCommand)


if __name__ == "__main__":
    manager.run()

4. settings.py

#  Use pymysql
import pymysql
pymysql.install_as_MySQLdb()

#  Configuration database ,  With the above code , You can't mysql+pymysql
# SQLALCHEMY_DATABASE_URI = "mysql+pymysql://lauf:[email protected]:3306/"
SQLALCHEMY_DATABASE_URI = "mysql://lauf:[email protected]:3306/flask_625"
SQLALCHEMY_TRACK_MODIFICATIONS = False
SQLALCHEMY_ECHO = True

5. models.py