python之tcp自動重連

操作系統： CentOS 6.9_x64

python語言版本： 2.7.13

問題描述

現有一個tcp客戶端程式，需定期從伺服器取數據，但由於種種原因（網路不穩定等）需要自動重連。

測試伺服器示例代碼：

https://github.com/mike-zhang/pyExamples/blob/master/socketRelate/tcpServer1_multithread.py

解決方案

'''
tcp client with reconnect
E-Mail : [email protected]
'''

#! /usr/bin/env python
#-*- coding:utf-8 -*-

import os,sys,time
import socket

def doConnect(host,port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    try :
        sock.connect((host,port))
    except :
        pass
    return sock

def main():
    host,port = "127.0.0.1",12345
    print host,port
    sockLocal = doConnect(host,port)

    while True :
        try :
            msg = str(time.time())
            sockLocal.send(msg)
            print "send msg ok : ",msg
            print "recv data :",sockLocal.recv(1024)
        except socket.error :
            print "\r\nsocket error,do reconnect "
            time.sleep(3)
            sockLocal = doConnect(host,port)
        except :
            print '\r\nother error occur '
            time.sleep(3)
        time.sleep(1)

if __name__ == "__main__" :
    main()

運行效果：

(py27env) [root@local t1]# python tcpClient1_reconnect.py
127.0.0.1 12345
send msg ok :  1498891374.98
recv data : 1498891374.98
send msg ok :  1498891375.98
recv data : 1498891375.98
send msg ok :  1498891376.98
recv data :

socket error,do reconnect
send msg ok :  1498891381.99
recv data : 1498891381.99
send msg ok :  1498891382.99
recv data : 1498891382.99

討論

這裡只是個簡單的示例代碼，實現了python的tcp自動重連。