sql 注入

import pymysql
def op_mysql(host,user,password,db,sql,port=3306,charset='utf8'):
conn = pymysql.connect(host=host,user=user,
password=password,
port=port,
charset=charset,db=db)
cur = conn.cursor(cursor=pymysql.cursors.DictCursor)
cur.execute(sql)
sql_start = sql[:6].upper() #取sql前6个字符串，判断它是什么类型的sql语句
if sql_start=='SELECT' :
res = cur.fetchall()
else:
conn.commit()
res = 'ok'
cur.close()
conn.close()
return res

conn = pymysql.connect(host='211.149.218.16',user='jxz',

password='123456',

port=3306,

charset='utf8',db='jxz')

cur = conn.cursor(cursor=pymysql.cursors.DictCursor)

name='zdq'

# sql = 'select * from bt_stu where username="%s"; '%name

sex='nv'

cur.execute('select * from bt_stu where real_name="%s;"' % name) #可以sql注入的

cur.execute('select * from bt_stu where real_name=%s and sex = %s',(name,sex)) #可以防止sql注入

print(cur.fetchall())

def test(a,b):
# print(a,b)
pass
li = [1,2]
d = {'a':'ybq','b':'mpp'}
test(li)
test(*d)
conn = pymysql.connect(host='211.149.218.16',user='jxz',
password='123456',
port=3306,
charset='utf8',db='jxz')
cur = conn.cursor(cursor=pymysql.cursors.DictCursor)

def op_mysql_new(sql,*data):
#利用 *data这个可变参数，就能防止sql注入了
print(sql)
print(data)
cur.execute(sql,data)
# cur.execute('select',(name,id,name))
# cur.execute('select * from user where name=%s',('haha'))
print(cur.fetchall())

sql = 'select * from user where username = %s and sex=%s;'

name='haha'

sex='xxx'

op_mysql_new(sql,name,sex)

conn = pymysql.connect(host='211.149.218.16',user='jxz',
password='123456',
port=3306,
charset='utf8',db='jxz')
cur = conn.cursor(cursor=pymysql.cursors.DictCursor)

sql = 'insert into seq (blue,red,date) values (%s,%s,%s)'
all_res = [
['16','01,02,03,05,09,06','2018-01-28'],
['15','01,02,03,05,09,06','2018-01-28'],
['14','01,02,03,05,09,06','2018-01-28'],
['13','01,02,03,05,09,06','2018-01-28'],
['13','01,02,03,05,09,06','2018-01-28'],
['13','01,02,03,05,09,06','2018-01-28'],
['13','01,02,03,05,09,06','2018-01-28'],
['13','01,02,03,05,09,06','2018-01-28'],
['13','01,02,03,05,09,06','2018-01-28'],
['13','01,02,03,05,09,06','2018-01-28'],
['13','01,02,03,05,09,06','2018-01-28'],
['13','01,02,03,05,09,06','2018-01-28'],
]
cur.executemany(sql,all_res)
conn.commit()