flask接口服务搭建

#!/usr/bin/python3
# encoding:utf-8
from flask import Flask, url_for
import flask
# url_for 接受两个参数（endpoint,**value）endpoint没有指定就是默认的函数名，根据 view_func.__name__

import pymysql
import json
import requests
app = Flask(__name__)
import decimal
# 规避TypeError: Object of type ‘Decimal‘ is not JSON serializable报错
class DecimalEncoder(json.JSONEncoder):
    def default(self, o):
        if isinstance(o, decimal.Decimal):
            return float(o)
        super(DecimalEncoder, self).default(o)
@app.route('/API/query/ChineseLessThanMath', endpoint='test112',methods=['GET'])
def ChineseLessThanMath():
    db = pymysql.connect(host='localhost',
                         user='root',
                         password='000000',
                         database='test')

    # 使用 cursor() 方法创建一个游标对象 cursor
    cursor = db.cursor()
    # 带字段名称的游标
    cursor = db.cursor(cursor=pymysql.cursors.DictCursor)
    # 使用 execute()  方法执行 SQL 查询
    sql = "select t1.s_score as '语文',t2.s_score as '数学',t1.s_id,t3.* from\
      (select s_score,s_id from score where c_id ='01') t1,\
      (select s_score,s_id  from score where c_id ='02') t2, student t3 where t1.s_id=t2.s_id and t1.s_id=t3.s_id and t1.s_score <t2.s_score"
    cursor.execute(sql)

    # 使用 fetchone() 方法获取单条数据.
    data1 = cursor.fetchone()
    data = cursor.fetchall()
    db.close()
    print('data:', data, '\n', 'data1:', data1)
    # return str(data)
    return json.dumps(data, ensure_ascii=False,cls=DecimalEncoder)
    # return data[0][4]
    # 关闭数据库连接


# app.add_url_rule('/list/1111', endpoint='test112', view_func=test112,
#                  methods=['GET'])  # 这里endpoint可以不填 ，view_func 一定要是函数名：具体看下面源码解释


@app.route('/API/query/TotalScore', methods=['get'])
def TotalScore():
    # from-data格式参数
    db = pymysql.connect(host='localhost',
                         user='root',
                         password='000000',
                         database='test')
    # 使用 cursor() 方法创建一个游标对象 cursor
    cursor = db.cursor()
    # 带字段名称的游标
    cursor = db.cursor(cursor=pymysql.cursors.DictCursor)
    # 使用 execute()  方法执行 SQL 查询
    sql = "select sum(t1.s_score),t1.s_id,count(t1.c_id),t2.* from  `score` t1 ,student t2 where t1.s_id=t2.s_id group by t1.s_id;"
    cursor.execute(sql)
    data = cursor.fetchall()
    lista = ['msg', 'msg_code', 'data']
    listb = ['请求成功', 200, data]
    ren1 = dict(zip(lista, listb))
    if ren1:
        ren = ren1
    else:
        ren = {'msg': '用户名或密码错误', 'msg_code': -1}

    return json.dumps(ren, ensure_ascii=False,cls=DecimalEncoder)



@app.route('/API/query/AvgLessThanSixth', methods=['post'])
def AvgLessThanSixth():
    # from-data格式参数
    usrname = flask.request.json.get('usrname')
    Avgsroce = flask.request.json.get('Avgsroce')
    db = pymysql.connect(host='localhost',
                         user='root',
                         password='000000',
                         database='test')
    # 使用 cursor() 方法创建一个游标对象 cursor
    cursor = db.cursor()
    # 带字段名称的游标
    cursor = db.cursor(cursor=pymysql.cursors.DictCursor)
    # 使用 execute()  方法执行 SQL 查询
    sql = "select avg(s_score),t1.s_id,t3.s_name from  `score` t1,student t3 where t1.s_id=t3.s_id  group by t1.s_id having avg(s_score)>{0};".format(Avgsroce)
    cursor.execute(sql)

    # 使用 fetchone() 方法获取单条数据.
    data1 = cursor.fetchone()
    data = cursor.fetchall()
    lista = ['msg', 'msg_code', 'data']
    listb = ['请求成功', 200, data]
    ren1 = dict(zip(lista, listb))
    if usrname and Avgsroce:
        if usrname == 'test':
            ren = ren1
        else:
            ren = {'msg': '用户名或密码错误', 'msg_code': -1}
    else:
        ren = {'msg': '参数错误', 'msg_code': 1001}
    return json.dumps(ren, ensure_ascii=False,cls=DecimalEncoder)


@app.route('/API/Add/Student', methods=['post'])
def AddStudent():
    # from-data格式参数
    name = flask.request.json.get('name')
    birth = flask.request.json.get('birth')
    sex = flask.request.json.get('sex')
    db = pymysql.connect(host='localhost',
                         user='root',
                         password='000000',
                         database='test')
    # 使用 cursor() 方法创建一个游标对象 cursor
    cursor = db.cursor()
    # 带字段名称的游标
    cursor = db.cursor(cursor=pymysql.cursors.DictCursor)
    # 使用 execute()  方法执行 SQL 查询
    sql = "insert into student(s_name,s_birth,s_sex) values('{0}','{1}','{2}');".format(name,birth,sex)
    print(sql)
    cursor.execute(sql)
    db.commit()

    # 使用 fetchone() 方法获取单条数据.
    data1 = cursor.fetchone()
    data = cursor.fetchall()
    lista = ['msg', 'msg_code', 'data']
    listb = ['请求成功', 200, data]
    ren1 = dict(zip(lista, listb))
    if name and birth and sex:
        ren = ren1
    else:
        ren = {'msg': '参数错误', 'msg_code': 1001}
    return json.dumps(ren, ensure_ascii=False,cls=DecimalEncoder)

@app.route('/API/Add/Score', methods=['post'])
def AddScore():
    # from-data格式参数
    sid = flask.request.json.get('sid')
    cid = flask.request.json.get('cid')
    score = flask.request.json.get('score')
    db = pymysql.connect(host='localhost',
                         user='root',
                         password='000000',
                         database='test')
    # 使用 cursor() 方法创建一个游标对象 cursor
    cursor = db.cursor()
    # 带字段名称的游标
    cursor = db.cursor(cursor=pymysql.cursors.DictCursor)
    # 使用 execute()  方法执行 SQL 查询
    sql = "insert into score(s_id,c_id,s_score) values('{0}','{1}',{2});".format(sid,cid,score)
    print(sql)
    cursor.execute(sql)
    db.commit()

    # 使用 fetchone() 方法获取单条数据.
    data1 = cursor.fetchone()
    data = cursor.fetchall()
    lista = ['msg', 'msg_code', 'data']
    listb = ['请求成功', 200, data]
    ren1 = dict(zip(lista, listb))
    if sid and cid and score:
        ren = ren1
    else:
        ren = {'msg': '参数错误', 'msg_code': 1001}
    return json.dumps(ren, ensure_ascii=False,cls=DecimalEncoder)
# #请求上下文
# with app.test_request_context():
#     pass

if __name__ == '__main__':
    app.run(debug=True,host='127.0.0.1', port=9000)
# app.run(debug=True)