Python script simply detects IP legitimacy and adds to whitelist files

First, function description

Sometimes the project needs to pass the IP address to determine whether to allow access, usually through a white list address file to hold these allowed to release the IP, but each time the file editing is cumbersome to open, error-prone, do not know whether to add, so with Python wrote a script to automatically add white list.

Ii. contents of the script

#!/usr/bin/env python#coding:utf-8#2017-06-09 ver:1.0import syswhite_list= "White_list.txt" add_ Ip=sys.argv[1].strip () checkip=add_ip.split ('. ') If len (Checkip)!= 4:  print ("ip[length") is illegal. Program Exit! ")   sys.exit (5) Elif not checkip[0].isdigit ()  or not  checkip[1].isdigit ( )  or not  checkip[2].isdigit ()  or not  checkip[3].isdigit ():   print ("ip[is not a number") is illegal. Program Exit! ")   sys.exit (5) Elif int (checkip[0])  >= 254 or int (checkIp[1])  >  255 or int (checkip[2])  >255  or int (checkip[3])  >255:   print ("ip[Digital Range") is illegal. Program Exit! ")   sys.exit (5) new_ip = str (add_ip +  "\ n") F=open (white_list, ' R ') IPS=f.readlines () if new_ip in ips:  print  "the add ip %s is in  White list. "  % new_ip.split () Else:  fw=open (wHite_list, ' A + ')   fw.write (new_ip)   print  "the add ip %s add  in white list ok~ " % new_ip.split ()   fw.close ()

III. Results of implementation

$./add_white.py 192.168.1.256
ip[number Range] illegal. Program Exit!
$./add_white.py 256.0.0.
ip[length] illegal. Program Exit!
$./add_white.py AFDAFDA
ip[length] illegal. Program Exit!
$./add_white.py A.A.A.A
Ip[is not a number] illegal. Program Exit!
$./add_white.py 192.1.1
ip[length] illegal. Program Exit!
$./add_white.py 192.168.1.2
The Add IP [' 192.168.1.2 '] add in white list ok~
]$./add_white.py 192.168.1.2
The Add IP [' 192.168.1.2 '] is in white list.

Writing is relatively simple, there is a wrong place to welcome the Exchange ~

This article is from the "end of the school" blog, please be sure to keep this source http://dyc2005.blog.51cto.com/270872/1943298

Python script simply detects IP legitimacy and adds to whitelist files