python通过SSH连接Oracle/Mysql数据库并导出到Excel

----------------------------------------------------------------------

                            |
-------------+              |    +----------+               +---------
    LOCAL    |              |    |  REMOTE  |               | PRIVATE
    CLIENT   | <== SSH ========> |  SERVER  | <== local ==> | SERVER
-------------+              |    +----------+               +---------
                            |    中间跳板机                  数据库服务器
                    FIREWALL (only port 10022 is open)

----------------------------------------------------------------------

#!/usr/bin/env python
#coding:utf-8
import cx_Oracle
import xlsxwriter
import time
from sshtunnel import SSHTunnelForwarder

userInfo = '数据库用户名/密码'
dbStr = '@PRIVATE SERVER IP:1521/数据库服务名'
connstr = userInfo + dbStr


LOCAL_PORT = 38399
DSN = "数据库用户名/密码@localhost:%d/dbcenter" %LOCAL_PORT

########不通过ssh来连接Oracle数据库直接用以下语句即可
#con = cx_Oracle.connect(connstr)



#数据库语句
sql ='''
     select * from TMP
     '''


#######通过ssh中间跳板机来连接Oracle数据库
with SSHTunnelForwarder(
         ('REMOTE SERVER IP', 10022),                     #远程中间跳板机器的配置
         ssh_password="root",
         ssh_username="root",
         remote_bind_address=("PRIVATE SERVER IP", 1521), #远程数据库所在机器配置
         local_bind_address=("127.0.0.1", LOCAL_PORT)    #本地转发接口配置,与DSN的配置相关
         ) as server:


        #如果是Mysql数据库则用以下连接
        # conn = MySQLdb.connect(host='127.0.0.1',        #此处必须是是127.0.0.1
        #                        port=server.local_bind_port,
        #                        user='user',
        #                        passwd='password',
        #                        db='dbname')
       print("sshConnectSuccess")
       con = cx_Oracle.connect(DSN)

       cursor = con.cursor()
       query1 = cursor.execute(sql)
       title = [i[0] for i in query1.description]
       date_now = time.strftime("%Y%m%d", time.localtime())

       #name and path
       report_name = "数据" + date_now + '.xlsx'
       #生成xlsx格式oracle查询统计报表
       workbook = xlsxwriter.Workbook(report_name, {'default_date_format': 'yyyy-mm-dd'})
       worksheet = workbook.add_worksheet()
       data = cursor.fetchall()
       worksheet.write_row(0, 0, title)
       for row, row_data in enumerate(data):
            worksheet.write_row(row+1, 0, row_data)
       cursor.close()
       con.close()
       workbook.close()

参考文章

【1】https://pypi.org/project/sshtunnel/#description

【2】https://www.cnblogs.com/luyingfeng/p/6386093.html

【3】https://github.com/oracle/python-cx_Oracle/issues/158