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【Python】socket.gaierror: [Errno 11001] getaddrinfo failed の原因と対処 | インターネットからファイルをダウンロードするサンプル

作成日：2022/02/18

urllib.request.urlretrieve でインターネット上のファイルをダウンロードしようとしたところ次のエラーが発生しました。

socket.gaierror: [Errno 11001] getaddrinfo failed 

import urllib.request



url='http://non-exist-server12345.comtest-2.txt'



# \\escape

download_file_name='c:\\temp\\test2.txt'



urllib.request.urlretrieve(url, download_file_name)

Traceback (most recent call last):

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\urllib\request.py", line 1342, in do_open

    h.request(req.get_method(), req.selector, req.data, headers,

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\http\client.py", line 1255, in request

    self._send_request(method, url, body, headers, encode_chunked)

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\http\client.py", line 1301, in _send_request

    self.endheaders(body, encode_chunked=encode_chunked)

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\http\client.py", line 1250, in endheaders

    self._send_output(message_body, encode_chunked=encode_chunked)

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\http\client.py", line 1010, in _send_output

    self.send(msg)

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\http\client.py", line 950, in send

    self.connect()

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\http\client.py", line 921, in connect

    self.sock = self._create_connection(

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\socket.py", line 822, in create_connection

    for res in getaddrinfo(host, port, 0, SOCK_STREAM):

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\socket.py", line 953, in getaddrinfo

    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):

socket.gaierror: [Errno 11001] getaddrinfo failed



During handling of the above exception, another exception occurred:



Traceback (most recent call last):

  File "c:\temp\test.py", line 8, in     urllib.request.urlretrieve(url, download_file_name)

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\urllib\request.py", line 239, in urlretrieve

    with contextlib.closing(urlopen(url, data)) as fp:

  File "C:\Users\username\AppData\Local\Programs\Python\Python39\lib\urllib\request.py", line 214, in urlopen

    return opener.open(url, data, timeout)

以下省略

サンプルコード

import urllib.request



url='http://tooljp.com/test.txt'



# \\escape

download_file_name='c:\\temp\\test2.txt'



urllib.request.urlretrieve(url, download_file_name)

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