Python - 对于 url，如何检查网络服务器是否可用或存在？ (使困惑)

Question

对于用户输入的url:

check that is any webserver hosting the domain name or not ?

例如:

url='laksjdfaksdfjajdfaljewoifjadslkjflkasjrlwkejk.com'

Now, the above url does-not exists, so there is no point of check for any HTTP error codes since, no server is there that will reply back.

那么，如何检测这样的 url 呢？

isServerUp() ?

Answer 1

这应该会为您打开 url；显然改变了你想说的 url 未能打开的方式。文档是:http://docs.python.org/library/urllib2.html

from urllib2 import *

req = Request(url)

# Try to open the url
try: 
    reponse = urlopen(req)
except HTTPError, e:
    url = None
except URLError, e:
    url = None

编辑:固定缩进