echo "151.101.196.249  github.global.ssl.fastly.net" >> /etc/hosts
echo "151.101.196.133 assets-cdn.github.com" >> /etc/hosts
/etc/rc.d/init.d/nscd restart

#  # pip3 install beautifulsoup4
#   pip3 install requests

import requests

from bs4 import BeautifulSoup

import os

import json

list = [

    'github.com',

    'assets-cdn.github.com',

    'avatars0.githubusercontent.com',

    'avatars1.githubusercontent.com',

    'documentcloud.github.com',

    'gist.github.com',

    'help.github.com',

    'nodeload.github.com',

    'raw.github.com',

    'status.github.com',

    'training.github.com',

    'github.io']

host='/etc/hosts'

cmd='/etc/rc.d/init.d/nscd restart'


hostlines=[]

GitHubDomainList=[]

#将文件读取到内存中

with open(host,"r",encoding="utf-8") as f:

    hostlines = f.readlines()

for i in list:

    url = "http://ip.chinaz.com/" + i.strip()

    resp = requests.get(url)

    soup = BeautifulSoup(resp.text)

    x = soup.find(class_="IcpMain02")

    x = x.find_all("span", class_="Whwtdhalf")

    j_str='{\"ip\":\"'+x[5].string.strip()+'\",\"domain\":\"'+i.strip()+'\"}'

    mes=json.loads(j_str)

    GitHubDomainList.append(mes)

# 删除掉GitHub的域名IP定义

with open(host,encoding="utf-8",mode="w") as f_w:

    for line in hostlines:

        found=False

        for c in GitHubDomainList:

            if c["domain"] in line:

                found=True

                break

        if not found:

         f_w.write(line+'\n')

# 追加到最后GitHub的域名IP定义

with open(host,encoding="utf-8",mode='a') as f_w:

    for a in GitHubDomainList:

        f_w.write(a['ip'] + "     " + a["domain"]+'\n')

# 执行DNS刷新命令

print(os.popen(cmd).read())

print('恭喜，成功完成GitHub的最优DNS配置!')