osx_linux.py 改进每次只需执行该脚本即可 #17

larryhu · 2014-06-07T16:58:49Z

osx_linux.py脚本文件改进,每次只需要执行该脚本即可,无需对原hosts文件手动修改,解决问题如下:
场景需求: 假如我的hosts文件里配置了几个家庭主机的host信息(或者公司的host信息)例:

192.168.1.9  hosts1
192.168.1.6  hosts2
192.168.1.8  hosts3

原来脚本执行之后,需要手动从hosts.bak文件恢复,新脚本将无需改动自动在后面追加云hosts配置信息,当再次更新时会自动查找并删除原云hosts配置信息,家庭或企业hosts信息将保留,无需手动修改

osx_linux.py脚本文件以及patch见最后面.

tag: googlecode地址能访问的几率远远低于github,故将云hosts的URL文件修改为github地址

非常感谢你们的项目,愿尽绵薄之力,谢谢!
另敬请对外提供donate页面

osx_linux.py脚本文件

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#author:rikugun

import sys
import urllib
import os
from shutil import copyfile


HOSTS_URL='https://raw.githubusercontent.com/smarthosts/smarthosts/master/trunk/hosts'
# HOSTS_URL='https://smarthosts.googlecode.com/svn/trunk/hosts'

LOCAL_HOSTS='/etc/hosts'
TAG_START = '###start smarthosts###'
TAG_END = '###end smarthosts###'

def main():
    """主函数"""
    #备份文件
    copyfile(LOCAL_HOSTS,'hosts.bak')

    lines = list()
    start = -1
    end = -1
    with open(LOCAL_HOSTS, 'r') as f:
        for i, line in enumerate(f):
            if line.startswith(TAG_START):
                start = i
            elif line.startswith(TAG_END):
                end = i
                line=''
            if end == -1 and start == -1:
                lines.append(line)
            elif end > -1:
                lines.append(line)

    with open(LOCAL_HOSTS,'w') as f:
        for line in lines:
            f.write(line)
        f.write(TAG_START+os.linesep)
        for line in urllib.urlopen(HOSTS_URL):
            f.write(line.strip()+os.linesep)
        f.write(TAG_END)

    print "success!"

if __name__ == '__main__':
    if len(sys.argv)>1:
        HOSTS_URL = sys.argv[1]
    main()

patch文件内容

diff --git a/trunk/osx_linux.py b/trunk/osx_linux.py
index 35be490..2827978 100644
--- a/trunk/osx_linux.py
+++ b/trunk/osx_linux.py
@@ -8,20 +8,41 @@ import os
 from shutil import copyfile


-HOSTS_URL='https://smarthosts.googlecode.com/svn/trunk/hosts'
+HOSTS_URL='https://raw.githubusercontent.com/smarthosts/smarthosts/master/trunk/hosts'
+# HOSTS_URL='https://smarthosts.googlecode.com/svn/trunk/hosts'

 LOCAL_HOSTS='/etc/hosts'
+TAG_START = '###start smarthosts###'
+TAG_END = '###end smarthosts###'

 def main():
     """主函数"""
     #备份文件
     copyfile(LOCAL_HOSTS,'hosts.bak')
-    with open(LOCAL_HOSTS,'aw') as hosts:
-        hosts.write(os.linesep)
-        #转义windows和unix的换行
-        for line in urllib.urlopen(HOSTS_URL):
-            hosts.write(line.strip()+os.linesep)
+    
+    lines = list()
+    start = -1
+    end = -1
+    with open(LOCAL_HOSTS, 'r') as f:
+        for i, line in enumerate(f):
+            if line.startswith(TAG_START):
+                start = i
+            elif line.startswith(TAG_END):
+                end = i
+                line=''
+            if end == -1 and start == -1:
+                lines.append(line)
+            elif end > -1:
+                lines.append(line)

+    with open(LOCAL_HOSTS,'w') as f:
+        for line in lines:
+            f.write(line)
+        f.write(TAG_START+os.linesep)
+        for line in urllib.urlopen(HOSTS_URL):
+            f.write(line.strip()+os.linesep)
+        f.write(TAG_END)
+            
     print "success!"

 if __name__ == '__main__':

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osx_linux.py 改进每次只需执行该脚本即可 #17

osx_linux.py 改进每次只需执行该脚本即可 #17

osx_linux.py 改进 每次只需执行该脚本即可 #17

osx_linux.py 改进 每次只需执行该脚本即可 #17

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osx_linux.py 改进每次只需执行该脚本即可 #17

osx_linux.py 改进每次只需执行该脚本即可 #17