Python tcp automatic reconnection, python tcp

Python tcp automatic reconnection, python tcp

Operating System: CentOS 6.9 _ x64

Python version: 2.7.13

Problem description

An existing tcp client program needs to fetch data from the server on a regular basis, but automatic reconnection is required for various reasons (such as network instability.

Sample Code of the test Server:

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

Solution

'''tcp client with reconnectE-Mail : Mike_Zhang@live.com'''#! /usr/bin/env python#-*- coding:utf-8 -*-import os,sys,timeimport socketdef doConnect(host,port):    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)    try :        sock.connect((host,port))    except :        pass    return sockdef 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()

Running effect:

(py27env) [root@local t1]# python tcpClient1_reconnect.py127.0.0.1 12345send msg ok :  1498891374.98recv data : 1498891374.98send msg ok :  1498891375.98recv data : 1498891375.98send msg ok :  1498891376.98recv data :socket error,do reconnectsend msg ok :  1498891381.99recv data : 1498891381.99send msg ok :  1498891382.99recv data : 1498891382.99

Discussion

Here is just a simple example code that implements the python tcp automatic reconnection.