flask通用项目结构

| - projectName

	| - app  //程序包

		| - templates //jinjia2模板

		|- static //css,js 图片等静态文件

		| - main  //py程序包 ，可以有多个这种包，每个对应不同的功能

			| - __init__.py

			|- errors.py

			|- forms.py

			|- views.py

		|- __init__.py

		|- email.py //邮件处理程序

		|- models.py //数据库模型

	|- migrations //数据迁移文件夹

	| - tests  //单元测试

		|- __init__.py

		|- test*.py //单元测试程序，可以包含多个对应不同的功能点测试

	|- venv  //虚拟环境

	|- requirements.txt //列出了所有依赖包以及版本号，方便在其他位置生成相同的虚拟环境以及依赖

	|- config.py //全局配置文件，配置全局变量

	|- manage.py //启动程序

flask 简介

http://docs.jinkan.org/docs/flask/quickstart.html#a-minimal-application

主体代码逻辑

一个最简单的查询服务样例



#!/usr/bin/env python

# -*- encoding: utf-8 -*-

#-------------------------------------------------------------------------------

'''

@Author  :   {SEASON}

@License :   (C) Copyright 2013-2022, {OLD_IT_WANG}

@Contact :   {shiter@live.cn}

@Software:   PyCharm

@File    :

@Time    :   2019/4/25 14:57

@Desc    :

'''

#-------------------------------------------------------------------------------

import json

import random

import logging

from flask import Flask

from flask_sqlalchemy import SQLAlchemy

from flask import request,Response

from flask_cors import CORS

log_file_str = 'shuanghe_demo.log'

log_level = logging.INFO

app = Flask(__name__)

CORS(app)

app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://username:password@ip:3306/database'

app.config['SQLALCHEMY_COMMIT_ON_TEARDOWN'] = True

db = SQLAlchemy(app)

english_chinese_dict = {'id':'身份证号',

'name':'姓名',

'sex':'性别',

'age':'年龄',

}

class neihuang_underwriting_search_result(db.Model):

    __tablename__ = 'neihuang_underwriting_search_result'

    id = db.Column(db.String(32),primary_key=True)

    name = db.Column(db.String(32))

    sex = db.Column(db.String(32))

    age = db.Column(db.String(32))

    def __repr__(self):

        return '<neihuang_underwriting_search_result %r>' % self.id

def convert_to_dict(obj):

    '''把Object对象转换成Dict对象'''

    result_dict = {}

    result_dict.update(obj.__dict__)

    result_dict.pop('_sa_instance_state', None)

    result_dict = random_value_of_labels(result_dict)

    return result_dict

def get_id_result(id):

    result = neihuang_underwriting_search_result.query.filter_by(id=id).one()

    result_dict = convert_to_dict(result)

    # result_list = database_name_conversion(result_dict)

    result_json = json.dumps(result_dict,ensure_ascii=False)

    return result_json

@app.route('/api/search',methods=['POST','GET'])

def search():

    #result_json  = get_id_result(id)

    if request.method == 'GET':

        user_id = json.loads(''.join(x for x in request.args))['id']

        print(user_id)

        app.logger.info(user_id + ' is search ING .......')

        result_json  = get_id_result(user_id)

    return Response(result_json)

if __name__ == '__main__':

    handler = logging.FileHandler(log_file_str, encoding='UTF-8')

    handler.setLevel(log_level)

    logging_format = logging.Formatter(

        '%(asctime)s - %(levelname)s - %(filename)s - %(funcName)s - %(lineno)s - %(message)s')

    handler.setFormatter(logging_format)

    app.logger.addHandler(handler)

    app.run(debug=True, host='0.0.0.0', port=18081)

    #放在这里是不对的

    # CORS(app, supports_credentials=True)

flask 跨域问题的处理

在处理跨域问题时候，应该把下列代码弄成全局的，也就是放

app = Flask(name)

cors = CORS(app)

否则跨域问题依然存在，报错信息为：

Access to XMLHttpRequest at ‘-----’ from origin ‘http://localhost:63342’ has been blocked by CORS policy: Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.

flask 日志

https://blog.****.net/iszhenyu/article/details/56846551

flask 微服务Flask-RESTful

写完了发现

https://flask-restful.readthedocs.io/en/latest/

启动服务命令

参考：https://www.cnblogs.com/zzyoucan/p/7764590.html

nohup command > myout.file 2>&1 &

秒客网

flask 完成简单查询请求处理，及跨域

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