socket.gethostbyname不为我的ddns主机名工作

Question

我有下面的代码平我的ddns主机名，并返回如果主机是上或下。然后我尝试添加socket.gethostbyname，它适用于我的普通主机名www.iamsimonsmale.co.uk，但不适用于http://ssmale.ddns.net。

我试图从地址的开头删除http://，但这也失败了。

#!/usr/bin/env python
# This script checks to see if the server is up or down and prints the pinged IP

import requests
import socket
import time

while True:

    host = 'http://ssmale.ddns.net'

    ip = socket.gethostbyname(host)

    print ip

    response = requests.get(host)
    if response.status_code == requests.codes.ok:
        print('Server Up')
    else:
        print('Server Down')
    time.sleep(10)

http://ssmale.ddns.net的错误消息是

Traceback (most recent call last):
File "PingTestIP.py", line 12, in <module>
ip = socket.gethostbyname('http://ssmale.ddns.net')
socket.gaierror: [Errno -2] Name or service not known

对于ssmale.ddns.net来说

Traceback (most recent call last):
File "PingTestIP.py", line 16, in <module>
response = requests.get(host)
File "/usr/lib/python2.7/dist-packages/requests/api.py", line 60, in get
return request('get', url, **kwargs)
File "/usr/lib/python2.7/dist-packages/requests/api.py", line 49, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 443, in request
prep = self.prepare_request(req)
File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 374, in prepare_request
hooks=merge_hooks(request.hooks, self.hooks),
File "/usr/lib/python2.7/dist-packages/requests/models.py", line 304, in prepare
self.prepare_url(url, params)
File "/usr/lib/python2.7/dist-packages/requests/models.py", line 358, in prepare_url
"Perhaps you meant http://{0}?".format(url))
requests.exceptions.MissingSchema: Invalid URL u'ssmale.ddns.net': No schema supplied. Perhaps you meant http://ssmale.ddns.net?

当使用`www.iamsimonsmale.co.uk完成时，它可以工作，打印结果是

86.136.251.202
Server Up

我还试图使用来自How do I get the IP address from a http request using the requests library?的代码，但没有成功。

使用这个工具(http://mxtoolbox.com/SuperTool.aspx#)，我确认在ssmale.ddns.net的DNS中有一个A记录

是什么引起了这个问题，我该如何解决呢？

Answer 1

查询没有http://部件的地址：

ip = socket.gethostbyname('ssmale.ddns.net')

然后在请求查询中使用完整地址：

response = requests.get("http://ssmale.ddns.net")

在我的机器上工作：

>>> import socket

>>> socket.gethostbyname("ssmale.ddns.net")
'86.136.251.202'

>>> import requests

>>> requests.get("http://ssmale.ddns.net")
<Response [200]>

您发布的错误消息已经说了：No schema supplied. Perhaps you meant http://ssmale.ddns.net?