需要用到ping这个module(https://github.com/jedie/python-ping/),

其中ping.PING_SHOW_LOG是我自己加在ping内的, 可以用来屏蔽一些ping中的输出, 另外, ping内有一个地方会在出错后直接exit, 在我的版本内也去掉了. 但出于版权原因, 我就不发了. 用的话, 自己改吧…

用python用的很弱, 所以不要笑我, 以上.

手动补上了全部的行首空格…看啦要研究一下怎么能在wordpress中粘贴时保留空格了…

#!/usr/bin/env python
# -*- encoding: utf-8 -*-
import os, sys, string
import socket
import urllib
import re

def getv2exip():
    import subprocess
    v2excmd = "nslookup a1.phobos.apple.com 178.79.131.110 | tail -n 2 | head -n 1 | sed 's/Address\: //g'"
    sp = subprocess.Popen(v2excmd, stdout = subprocess.PIPE, shell = True)
    v2exip = sp.stdout.read()
    return v2exip.replace("\n", "").replace("\r", "")

def getjustpingip():
    justpingips = []
    try:
        justpingURL = "http://www.just-ping.com/index.php?vh=a1.phobos.apple.com&c=&s=ping%%21"
        print justpingURL
        justpingContent = urllib.urlopen(justpingURL).read()
        justping_re = re.compile('xmlreqGET\(\'(.*)\',\'.*')
        alljustpingurl = justping_re.findall(justpingContent)
        for url in alljustpingurl:
            fullurl = "http://www.just-ping.com/%s"%url
            print fullurl
            justpingreturn = urllib.urlopen(fullurl).read()
            if len(justpingreturn) > 0:
                parts = justpingreturn.split(":;")
                justpingip = parts.pop()
                if len(justpingip.split(".")) == 4:
                    justpingips.append(justpingip)
        return justpingips
    except:
        print "getjustpingip has some error"
        return justpingips

def getFastestIP():
    allips = []
    allips.append(getv2exip())
    print "get v2exip finish"
    allips.extend(getjustpingip())
    print "get justpingip finish"
    pingDelay = {}
    import ping
    ping.PING_SHOW_LOG = False
    for ip in allips:
        try:
            delay = ping.Ping(ip, timeout=2000).do()
            if not delay is None:
                #print "%s: %s" % (ip, delay)
                pingDelay[ip] = delay
        except socket.error, e:
            print "ping Error: ", e

    from operator import itemgetter
    sortedPingDelay = sorted(pingDelay.iteritems(), key=itemgetter(1))
    if len(sortedPingDelay) > 1 :
        fastest = sortedPingDelay[0]
        return fastest[0]
    else:
        print "Can not find any ip addresses"
        exit(0)

def changeHostsFile(ip):
    hostsLines = []
    hosts = open('/etc/hosts')
    hosts.seek(0)
    for line in hosts.readlines():
        if line.find("phobos.apple.com") == -1:
            hostsLines.append(line)
    hosts.close()
    hostsLines.append("\n")
    for i in range(2000):
        hostsLines.append("%s\t\ta%d.phobos.apple.com\n" % (ip, i+1))
    hosts = open('/etc/hosts', "w")
    hosts.seek(0)
    hosts.writelines(hostsLines)
    hosts.close()

def main():
    ip = getFastestIP()
    print "fastest: %s" % ip
    changeHostsFile(ip)

if __name__ == '__main__':
    main()