socket.gethostbyname 不适用于我的 ddns 主机名

Question

我有以下代码来 ping 我的 ddns 主机名并在主机启动或关闭时返回。然后我尝试添加socket.gethostbyname，它适用于我的正常主机名www.iamsimonsmale.co.uk，但不适用于http://ssmale.ddns.net。

我尝试从地址开头删除http://，但也失败了。

#!/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 是

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 完成后，它可以工作并且打印出来

86.136.251.202
Server Up

我也尝试使用来自How do I get the IP address from a http request using the requests library? 的代码，但没有成功。

使用此工具 (http://mxtoolbox.com/SuperTool.aspx#) 我确认在 ssmale.ddns.net 的 DNS 中有一条 A 记录

是什么导致了这个问题，我将如何解决它？

Answer 1

查询不带http://的地址：

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

然后在您的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明：No schema supplied. Perhaps you meant http://ssmale.ddns.net?