我该如何解决这个 IOError: [Errno socket error] [Errno 11004]? [英] How do I fix this IOError: [Errno socket error] [Errno 11004]?

问题描述

这个简单的 Python 3 脚本:

import urllib.request

host = "scholar.google.com"
link = "/scholar.bib?q=info:K7uZdMSvdQ0J:scholar.google.com/&output=citation&hl=en&as_sdt=1,14&ct=citation&cd=0"
url = "http://" + host + link
filename = "cite0.bib"
print(url)
urllib.request.urlretrieve("http://scholar.google.com" + url, filename)

引发此异常:

Traceback (most recent call last):
  File "C:/Users/ricardo/Desktop/Google-Scholar/BibTex/test2.py", line 8, in <module>
    urllib.request.urlretrieve("http://scholar.google.com" + url, filename)
  File "C:\Python32\lib\urllib\request.py", line 150, in urlretrieve
    return _urlopener.retrieve(url, filename, reporthook, data)
  File "C:\Python32\lib\urllib\request.py", line 1569, in retrieve
    fp = self.open(url, data)
  File "C:\Python32\lib\urllib\request.py", line 1541, in open
    raise IOError('socket error', msg).with_traceback(sys.exc_info()[2])
  File "C:\Python32\lib\urllib\request.py", line 1537, in open
    return getattr(self, name)(url)
  File "C:\Python32\lib\urllib\request.py", line 1715, in open_http
    return self._open_generic_http(http.client.HTTPConnection, url, data)
  File "C:\Python32\lib\urllib\request.py", line 1695, in _open_generic_http
    http_conn.request("GET", selector, headers=headers)
  File "C:\Python32\lib\http\client.py", line 967, in request
    self._send_request(method, url, body, headers)
  File "C:\Python32\lib\http\client.py", line 1005, in _send_request
    self.endheaders(body)
  File "C:\Python32\lib\http\client.py", line 963, in endheaders
    self._send_output(message_body)
  File "C:\Python32\lib\http\client.py", line 808, in _send_output
    self.send(msg)
  File "C:\Python32\lib\http\client.py", line 746, in send
    self.connect()
  File "C:\Python32\lib\http\client.py", line 724, in connect
    self.timeout, self.source_address)
  File "C:\Python32\lib\socket.py", line 386, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
IOError: [Errno socket error] [Errno 11004] getaddrinfo failed

我可以打开 print 语句产生的 url 就好了:

I can open the url that results from the print statement just fine:

http://scholar.google.com/scholar.bib?q=info:K7uZdMSvdQ0J:scholar.google.com/&output=citation&hl=en&as_sdt=1,14&ct=citation&cd=0

这是什么原因造成的?我尝试将 http:// 更改为 http:///(三个斜杠)，但引发了相同的异常.

What is causing this? I tried changing http:// to http:/// (three slashes), but the same exception is raised.

推荐答案

这是你的问题:

urllib.request.urlretrieve("http://scholar.google.com" + url, filename)

您将 http://scholar.google.com 部分添加两次(url already 开始 http:///scholar.google.com).因此，urillib 认为您要访问 scholar.google.comhttp 上的页面——不用说，这个域不存在.这正是您的错误所说的.

You're adding the http://scholar.google.com part twice (url already starts http://scholar.google.com). Therefore urillib thinks you're asking for a page on scholar.google.comhttp -- needless to say, this domain does not exist. Which is exactly what your error says.

显然只是请求url.

方便的提示，以便将来更快地找到此类事情:添加 print 语句进行调试时，请确保打印您在命令中使用的实际值调试.如果您的 print 语句也连接了基本 URL，您将在大约两秒钟内发现这一点.

Handy hint to find this kind of thing faster in the future: when adding a print statement for debugging, be sure to print the actual value you are using in the command you're debugging. You would have found this in approximately two seconds if your print statement had also concatenated the base URL.

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