helper.py
import pymysql
from settings import Config
def connect():
conn = Config.POOL.connection()
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor) # 以 字典的方式 显示
return conn,cursor
def connect_close(conn,cursor):
cursor.close()
conn.close()
def fetch_all(sql,args):
conn,cursor = connect()
cursor.execute(sql, args)
record_list = cursor.fetchall()
connect_close(conn,cursor)
return record_list
def fetch_one(sql, args):
conn, cursor = connect()
cursor.execute(sql, args)
result = cursor.fetchone()
connect_close(conn, cursor)
return result
def insert(sql, args):
conn, cursor = connect()
row = cursor.execute(sql, args)
conn.commit()
connect_close(conn, cursor)
return row
settings.py
from DBUtils.PooledDB import PooledDB, SharedDBConnection
import pymysql
# 下载 DBUtils : pip3 install DBUtils
class Config(object):
SALT = b"sdf1123df"
SECRET_KEY = 'asdf123sdfsdfsdf'
MAX_CONTENT_LENGTH = 1024 * 1024 * 7
POOL = PooledDB(
creator=pymysql, # 使用链接数据库的模块
maxconnections=6, # 连接池允许的最大连接数,0和None表示不限制连接数
mincached=2, # 初始化时,链接池中至少创建的空闲的链接,0表示不创建
maxcached=5, # 链接池中最多闲置的链接,0和None不限制
maxshared=3,
# 链接池中最多共享的链接数量,0和None表示全部共享。PS: 无用,因为pymysql和MySQLdb等模块的 threadsafety都为1,所有值无论设置为多少,_maxcached永远为0,所以永远是所有链接都共享。
blocking=True, # 连接池中如果没有可用连接后,是否阻塞等待。True,等待;False,不等待然后报错
maxusage=None, # 一个链接最多被重复使用的次数,None表示无限制
setsession=[], # 开始会话前执行的命令列表。如:["set datestyle to ...", "set time zone ..."]
ping=0,
# ping MySQL服务端,检查是否服务可用。# 如:0 = None = never, 1 = default = whenever it is requested, 2 = when a cursor is created, 4 = when a query is executed, 7 = always
host='127.0.0.1',
port=3306,
user='root',
password='123456',
database='db2',
charset='utf8'
)
views.py
@account.route('/login/', methods=['GET', 'POST'])
def login():
'''
登陆
:return:
'''
if request.method == 'GET':
return render_template('login.html')
username = request.form.get('user')
password = request.form.get('pwd')
pwd_md5 = md5(password)
data = helper.fetch_one("select id,nickname from userinfo where user=%s and pwd =%s", (username, pwd_md5))
if not data:
return render_template('login.html', error='用户名密码错误')
# session['user_info'] = data
session['user_info'] = {'id': data['id'], 'nickname': data['nickname']}
return redirect('/home/')