Python 实现断网自动重连

先从最基本的功能说起：发送Post给服务器。这里你需要知道你登录的时候到底发送了什么，大概看一下登录页面的代码：

function do_login()  
{     
    var uname=document.form1.uname.value;  
    var pass=document.form1.pass.value;  
    if(uname=="")  
    {  
        alert("请填写用户名");  
        document.form1.uname.focus();  
        return;  
    }  

    if(pass=="")  
    {  
        alert("请填写密码");  
        document.form1.pass.focus();  
        return;  
    }  
    //密码md5加密传送  
    var pass1=hex_md5(pass);  
    var pass2=pass1.substr(8,16);  

    var drop=(document.form1.drop.checked==true)?1:0;  
    var data="username="+uname+"&password="+pass2+"&drop="+drop+"&type=1&n=100";  

    var con=postData("/cgi-bin/do_login", "post", data);  
    //alert(con);   
    var p=/^[\d]+$/;  
    if(p.test(con))  
    {  
        document.form1.uid.value=con;  
        if(document.form1.save_me.checked) //写COOKIE  
        {  
            setCookie("srun_login",uname+"|"+pass);  
        }  
        else  
        {  
            delCookie("srun_login");  
        }  
        if(location.search != "")  
        {  
            window.open("login.html"+location.search+","+con+","+uname,"user_login","width=428,height=296");      
        }  
        else  
        {  
            window.open("login.html?"+location.search+","+con+","+uname,"user_login","width=428,height=296");  
        }  
        setTimeout("jump_to(url)", 1000);     
        return;  
    }     
    switch(con)  
    {  

    }     
}  

可以发现，

var data="username="+uname+"&password="+pass2+"&drop="+drop+"&type=1&n=100";  

这一句，就是Post的内容了，当然密码是MD5加密过后的，这个随便找找也没有问题的

接下来是检测网络是否连接，我采用Ping百度的办法，毕竟这是百度最大的功能之一，网上参考一下别人的代码，自己写了一个：

def ping(user,password):  
        fnull = open(os.devnull, 'w')  
        return1 = subprocess.call('ping 61.135.169.125', shell = True, stdout = fnull, stderr = fnull)  
        if return1:  
                print_ts('Internet not connected!')  
                print_ts('Connecting now...')  
                postLogin('http://159.226.39.22/cgi-bin/do_login',user,password)  
                ping(user,password)  
        else:  
                print_ts('Internet connected!')  
        fnull.close()  

最后是定时运行，需要用到Python的time模块

def print_ts(message):  
        print "[%s] %s"%(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()), message)  
def run(interval,user,password):  
        print_ts("-"*50)  
        print_ts ('Copyright (c) Huntley')  
        print_ts ('Email:[email protected]')  
        print_ts ('')  
        print_ts("Check the Internet every %s seconds."%interval)  
        print_ts("-"*50)  
        while True:  
                try:  
                        time_remaining = interval-time.time()%interval  
                        time.sleep(time_remaining)  
                        print_ts("Checking Internet connection...")  
                        ping(user,password)  
                        print_ts("Next check will start after %s seconds"%interval)  
                except Exception, e:  
                        print e  

完整代码：

#!/usr/bin/env python  
#coding=utf8  

import urllib  
import urllib2  
import hashlib  
import subprocess  
import os  
import time  

def getPass(password):  
        pass1 = hashlib.md5()  
        pass1.update(password)  
        pass2 = pass1.hexdigest()  
        return pass2[8:24]  

def postLogin(url,user,password):  
        pass2 = getPass(password)  
        headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36 Edge/14.14393'}  
        post_data = {'username':user,'password':pass2,'drop':'0','type':'1','n':'100'}  
        post_data = urllib.urlencode(post_data)  
        req = urllib2.Request(url, post_data, headers)  
        response = urllib2.urlopen(req)  

def ping(user,password):  
        fnull = open(os.devnull, 'w')  
        return1 = subprocess.call('ping 61.135.169.125', shell = True, stdout = fnull, stderr = fnull)  
        if return1:  
                print_ts('Internet not connected!')  
                print_ts('Connecting now...')  
                postLogin('http://159.226.39.22/cgi-bin/do_login',user,password)  
                ping(user,password)  
        else:  
                print_ts('Internet connected!')  
        fnull.close()  

def print_ts(message):  
        print "[%s] %s"%(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()), message)  
def run(interval,user,password):  
        print_ts("-"*50)  
        print_ts ('Copyright (c) Huntley')  
        print_ts ('Email:[email protected]')  
        print_ts ('')  
        print_ts("Check the Internet every %s seconds."%interval)  
        print_ts("-"*50)  
        while True:  
                try:  
                        time_remaining = interval-time.time()%interval  
                        time.sleep(time_remaining)  
                        print_ts("Checking Internet connection...")  
                        ping(user,password)  
                        print_ts("Next check will start after %s seconds"%interval)  
                except Exception, e:  
                        print e  

# 设置联网检查时间间隔  
interval = 600  
# 设置用户名  
user = 'TYPE YOUR USERNAME HERE'  
# 设置密码  
password = 'TYPE YOUR PASSWORD HERE'  
# 运行  
run(interval,user,password)