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當 URL 不可訪問時 response = requests.get 錯誤

[英]response = requests.get error when URL is not reachable

我正在嘗試編寫一個腳本,它的一部分必須檢查 URL 是否可用。 問題是,當我收到 200,404 等回復時,程序運行良好,我可以處理回復,但是當無法訪問 URL 時,程序會出現以下錯誤。 這是代碼的一部分:

response = requests.get(url)
print (response)

錯誤:

Traceback (most recent call last):
  File "C:\Python\lib\site-packages\requests\packages\urllib3\connection.py", line 141, in _new_conn
    (self.host, self.port), self.timeout, **extra_kw)
  File "C:\Python\lib\site-packages\requests\packages\urllib3\util\connection.py", line 60, in create_connection
    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
  File "C:\Python\lib\socket.py", line 743, 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:\Python\lib\site-packages\requests\packages\urllib3\connectionpool.py", line 600, in urlopen
    chunked=chunked)
  File "C:\Python\lib\site-packages\requests\packages\urllib3\connectionpool.py", line 345, in _make_request
    self._validate_conn(conn)
  File "C:\Python\lib\site-packages\requests\packages\urllib3\connectionpool.py", line 844, in _validate_conn
    conn.connect()
  File "C:\Python\lib\site-packages\requests\packages\urllib3\connection.py", line 284, in connect
    conn = self._new_conn()
  File "C:\Python\lib\site-packages\requests\packages\urllib3\connection.py", line 150, in _new_conn
    self, "Failed to establish a new connection: %s" % e)
requests.packages.urllib3.exceptions.NewConnectionError: <requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x03EC9970>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed

有解決方法嗎? 如果我可以將腳本設置為打印諸如 URL not available and exists 之類的行,那就太好了。

只需捕獲異常 requests文檔的錯誤和異常部分表明您應該能夠在此處捕獲requests.ConnectionError異常

try:
    response = requests.get(url)
except requests.ConnectionError:
    print("Can't connect to the site, sorry")
else:
    print(response)

使用不存在的主機名的快速演示:

>>> import requests
>>> try:
...     response = requests.get("http://no_such_site_exists.imsure")
... except requests.ConnectionError:
...     print("Can't connect to the site, sorry")
... else:
...     print(response)
...
Can't connect to the site, sorry

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