github 加速访问——Python 代码自动化实现

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import re
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import requests
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import os
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#1.若hosts中本身配置过就删除掉原来配置的。 地址是windows默认存放hosts的位置
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with open("C:\Windows\System32\drivers\etc\hosts","r",encoding="utf-8") as f:
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    lines = f.readlines()
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    #print(lines)
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with open("C:\Windows\System32\drivers\etc\hosts","w",encoding="utf-8") as f_w:
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    for line in lines:
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        #删除包括github.com的那一行内容
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        if "github.com" in line:
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            continue
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        #和上面的同理
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        if "github.global.ssl.fastly.net" in line:
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            continue
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        f_w.write(line)
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#2.获取域名对应的ip地址
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#二级域名
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SecondLevelDomain = "github.com"
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url1 = "https://{SecondLevelDomain}.ipaddress.com/".format(SecondLevelDomain=SecondLevelDomain)
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#次级域名
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SubDomain = "assets-cdn.github.com"
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url2 = "https://{SecondLevelDomain}.ipaddress.com/{SubDomain}".format(SecondLevelDomain=SecondLevelDomain, SubDomain=SubDomain)
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#大概是给github搞加速的厂商的域名fastly.net
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url3 = "https://fastly.net.ipaddress.com/github.global.ssl.fastly.net"
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#请求链接
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r1 = requests.get(url1)
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r1.status_code
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r1.encoding = 'utf-8'
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#获取响应体
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r1=r1.text
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# print(r1)
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pattern = re.compile('https://www.ipaddress.com/ipv4/[0-9]*.[0-9]*.[0-9]*.[0-9]*')
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#https://www.ipaddress.com/ipv4/140.82.113.4
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res = pattern.findall(r1)
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res = res[0].split("/ipv4/");#切片
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res1 = res[1];#获取到ip地址
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res1 = res1+" github.com"
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print(res1)
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r2 = requests.get(url2)
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r2.encoding = 'utf-8'
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#获取响应体
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r2=r2.text
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# print(r2)
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pattern = re.compile('https://www.ipaddress.com/ipv4/[0-9]*.[0-9]*.[0-9]*.[0-9]*')
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#https://www.ipaddress.com/ipv4/140.82.113.4
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res = pattern.findall(r2)
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res = res[0].split("/ipv4/");#切片
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res2 = res[1];#获取到ip地址
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res2 = res2+" assets-cdn.github.com"
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print(res2)
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r3 = requests.get(url3)
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r3.encoding = 'utf-8'
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#获取响应体
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r3=r3.text
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# print(r3)
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pattern = re.compile('https://www.ipaddress.com/ipv4/[0-9]*.[0-9]*.[0-9]*.[0-9]*')
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#https://www.ipaddress.com/ipv4/140.82.113.4
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res = pattern.findall(r3)
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res = res[0].split("/ipv4/");#切片
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res3 = res[1];#获取到ip地址
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res3 = res3+" github.global.ssl.fastly.net"
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print(res3)
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#3.写入hosts文件
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f=open("C:\Windows\System32\drivers\etc\hosts","a")
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f.write(res1+"\n");
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f.write(res2+"\n");
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f.write(res3+"\n");
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f.close();
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#4.刷新DNS缓存
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os.system("ipconfig /flushdns")