Python 網路連線、公開資料串接 下載特定網址資料異常處理

異常狀態發生

# 載入模組    import urllib.request as request    # 指定網址    src = "https://python.org/"    # 開啟網址資料    request.urlopen(src)       執行異常訊息：    Traceback (most recent call last):      File  "...PythonPython39liburllib equest.py", line 1346, in do_open        h.request(req.get_method(),  req.selector, req.data, headers,      File  "...PythonPython39libhttpclient.py", line 1253, in request        self._send_request(method,  url, body, headers, encode_chunked)      File  "...PythonPython39libhttpclient.py", line 1299, in  _send_request        self.endheaders(body,  encode_chunked=encode_chunked)      File  "...PythonPython39libhttpclient.py", line 1248, in endheaders         self._send_output(message_body, encode_chunked=encode_chunked)      File  "...PythonPython39libhttpclient.py", line 1008, in  _send_output        self.send(msg)      File  "...PythonPython39libhttpclient.py", line 948, in send        self.connect()      File  "...PythonPython39libhttpclient.py", line 1422, in connect        self.sock =  self._context.wrap_socket(self.sock,      File  "...PythonPython39libssl.py", line 500, in wrap_socket        return  self.sslsocket_class._create(      File  "...PythonPython39libssl.py", line 1040, in _create        self.do_handshake()      File  "...PythonPython39libssl.py", line 1309, in do_handshake        self._sslobj.do_handshake()    ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED]  certificate verify failed: certificate has expired (_ssl.c:1129)       During handling of the above exception, another exception occurred:       Traceback (most recent call last):      File "... et_data.py",  line 9, in <module>        request.urlopen(src)      File "...PythonPython39liburllib equest.py",  line 214, in urlopen        return opener.open(url,  data, timeout)      File  "...PythonPython39liburllib equest.py", line 517, in open        response = self._open(req,  data)      File  "...PythonPython39liburllib equest.py", line 534, in _open        result =  self._call_chain(self.handle_open, protocol, protocol +      File  "...PythonPython39liburllib equest.py", line 494, in  _call_chain        result = func(*args)      File  "...PythonPython39liburllib equest.py", line 1389, in  https_open        return  self.do_open(http.client.HTTPSConnection, req,      File  "...PythonPython39liburllib equest.py", line 1349, in do_open        raise URLError(err)    urllib.error.URLError: <urlopen error [SSL:  CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has expired  (_ssl.c:1129)>

搜尋異常狀態

# 載入模組    import urllib.request as request    # 指定網址    src = "https://python.org/"    # 開啟網址資料    #request.urlopen(src)    from urllib.error import HTTPError, URLError    try:        request.urlopen(src)        print("urlopen OK")    except HTTPError as e:        print("HTTP code error: ",  e.reason)    except URLError as error:        print("URLError code error:  ", error.reason)    顯示執行異常訊息：    URLError code error:  [SSL:  CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has  expired (_ssl.c:1129)    問題發生原因：    驗證 SSL 憑證異常。

修改說明：選擇不用認證此 SSL 憑證

# 載入模組    import urllib.request as request    import ssl    from urllib.error import HTTPError, URLError    # 指定網址    src = "https://python.org/"    # 取消 SSL 憑證 認證    ssl._create_default_https_context = ssl._create_unverified_context    # 開啟網址資料    try:        request.urlopen(src)        print("urlopen OK")    except HTTPError as e:        print("HTTP code error: ",  e.reason)    except URLError as error:        print("URLError code error:  ", error.reason)       顯示正確執行訊息：    urlopen OK