求助：远程无响应，关闭连接怎么办？

Question

我想用以下代码从网页获取HTML源代码：

import requests
url = "https://dictionary.cambridge.org/us/dictionary/english-arabic/hi"
r = requests.get(url)

但是得到了如下报错：

Traceback (most recent call last):
  File "/home/username/ak_env/lib/python3.8/site-packages/urllib3/connectionpool.py", line 699, in urlopen
    httplib_response = self._make_request(
  File "/home/username/ak_env/lib/python3.8/site-packages/urllib3/connectionpool.py", line 445, in _make_request
    six.raise_from(e, None)
  File "<string>", line 3, in raise_from
  File "/home/username/ak_env/lib/python3.8/site-packages/urllib3/connectionpool.py", line 440, in _make_request
    httplib_response = conn.getresponse()
  File "/usr/lib/python3.8/http/client.py", line 1347, in getresponse
    response.begin()
  File "/usr/lib/python3.8/http/client.py", line 307, in begin
    version, status, reason = self._read_status()
  File "/usr/lib/python3.8/http/client.py", line 276, in _read_status
    raise RemoteDisconnected("Remote end closed connection without"
http.client.RemoteDisconnected: Remote end closed connection without response

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/username/ak_env/lib/python3.8/site-packages/requests/adapters.py", line 439, in send
    resp = conn.urlopen(
  File "/home/username/ak_env/lib/python3.8/site-packages/urllib3/connectionpool.py", line 755, in urlopen
    retries = retries.increment(
  File "/home/username/ak_env/lib/python3.8/site-packages/urllib3/util/retry.py", line 532, in increment
    raise six.reraise(type(error), error, _stacktrace)
  File "/home/username/ak_env/lib/python3.8/site-packages/urllib3/packages/six.py", line 734, in reraise
    raise value.with_traceback(tb)
  File "/home/username/ak_env/lib/python3.8/site-packages/urllib3/connectionpool.py", line 699, in urlopen
    httplib_response = self._make_request(
  File "/home/username/ak_env/lib/python3.8/site-packages/urllib3/connectionpool.py", line 445, in _make_request
    six.raise_from(e, None)
  File "<string>", line 3, in raise_from
  File "/home/username/ak_env/lib/python3.8/site-packages/urllib3/connectionpool.py", line 440, in _make_request
    httplib_response = conn.getresponse()
  File "/usr/lib/python3.8/http/client.py", line 1347, in getresponse
    response.begin()
  File "/usr/lib/python3.8/http/client.py", line 307, in begin
    version, status, reason = self._read_status()
  File "/usr/lib/python3.8/http/client.py", line 276, in _read_status
    raise RemoteDisconnected("Remote end closed connection without"
urllib3.exceptions.ProtocolError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/username/ak_env/lib/python3.8/site-packages/requests/api.py", line 76, in get
    return request('get', url, params=params, **kwargs)
  File "/home/username/ak_env/lib/python3.8/site-packages/requests/api.py", line 61, in request
    return session.request(method=method, url=url, **kwargs)
  File "/home/username/ak_env/lib/python3.8/site-packages/requests/sessions.py", line 542, in request
    resp = self.send(prep, **send_kwargs)
  File "/home/username/ak_env/lib/python3.8/site-packages/requests/sessions.py", line 655, in send
    r = adapter.send(request, **kwargs)
  File "/home/username/ak_env/lib/python3.8/site-packages/requests/adapters.py", line 498, in send
    raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

大佬们，有没有办法解决这个问题？或者有其他函数可以获取源代码吗？我使用了wget，效果还不错。如果实在没有办法解决这个问题的话，我可能会用wget下载页面。

Answer 1

添加一个请求头就好了

h = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36'}
r = requests.get(url, headers=h)

---

本文参与了SegmentFault 思否面试闯关挑战赛，欢迎正在阅读的你也加入。