pythonホストステータスの検出

#!/usr/bin/python
import dns.resolver, os, httplib
iplist = []appdomain = "cdsendmail.ecwise.com"
def checkip(ip):checkurl = ip + ":80"getcontent = ""httplib.socket.setdefaulttimeout(5)conn = httplib.HTTPConnection(checkurl)

    try:
            conn.request("GET","/",headers = {"host": appdomain})
            r = conn.getresponse()
            getcontent = r.read(15)
            print(getcontent)
    finally:
            if getcontent == ":
                    print ip + " [OK]"
            else:
                    print ip + " [error]"

def getip(domain):try:a = dns.resolver.query(domain, 'A')except Exception as E:print "dns resolve error"+str(E)return 0for i in a.response.answer:for j in i.items:iplist.append(j.address)print iplistreturn True
if name == "main":if getip(appdomain) and len(iplist) > 0:for ip in iplist:checkip(ip)else:print "dns resolve error!"