Python請求中的SSLError（讀取操作超時）

Question

我有一個python API腳本，盡管使用了try/except ，我的腳本有時會在此行終止。 這是代碼：

    try:
            r = requests.post(URL, data=params, headers=headers, timeout=self.request_timeout)
            try:
                response = r.json()
            except Exception, e:
                message = "ERROR_0104! Unexpected error occured. The error is: "
                message += str(e)
                print message
                aux_func.write_log(message)
                return 'Switch'
    except requests.exceptions.RequestException:
            print "Exception occurred on 'API requests post' procedure."
            counter += 1
            continue
    ...

錯誤發生在上面顯示的代碼的第二行。 這是錯誤：

     r = requests.post(URL, data=params, headers=headers, timeout=self.request_timeout)
      File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 88, in post
        return request('post', url, data=data, **kwargs)
      File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 44, in request
        return session.request(method=method, url=url, **kwargs)
      File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 383, in request
        resp = self.send(prep, **send_kwargs)
      File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 486, in send
        r = adapter.send(request, **kwargs)
      File "/usr/local/lib/python2.7/dist-packages/requests/adapters.py", line 394, in send
        r.content
      File "/usr/local/lib/python2.7/dist-packages/requests/models.py", line 679, in content
        self._content = bytes().join(self.iter_content(CONTENT_CHUNK_SIZE)) or bytes()
      File "/usr/local/lib/python2.7/dist-packages/requests/models.py", line 616, in generate
        decode_content=True):
      File "/usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/response.py", line 236, in stream
        data = self.read(amt=amt, decode_content=decode_content)
      File "/usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/response.py", line 183, in read
        data = self._fp.read(amt)
      File "/usr/lib/python2.7/httplib.py", line 543, in read
        return self._read_chunked(amt)
      File "/usr/lib/python2.7/httplib.py", line 585, in _read_chunked
        line = self.fp.readline(_MAXLINE + 1)
      File "/usr/lib/python2.7/socket.py", line 476, in readline
        data = self._sock.recv(self._rbufsize)
      File "/usr/lib/python2.7/ssl.py", line 305, in recv
        return self.read(buflen)
      File "/usr/lib/python2.7/ssl.py", line 224, in read
        return self._sslobj.read(len)
    ssl.SSLError: The read operation timed out

我認為Requests模塊中的某些內容導致了這一點，但我不知道是什么。

Answer 1

正如它所說，讀取操作已經超時。

但是，它超時了ssl.SSLError 。 這不是你的except 。 如果要捕獲並重試，則需要捕獲正確的錯誤。

Answer 2

我看到由於缺乏足夠的細節，這里有一些關於解決方案的混淆。 我將評論的答案發布到頂部帖子，但評論部分的格式不是很好，我會在這里發布格式正確的答案。

正如Veedrac所提到的那樣，問題在於我沒有抓住我在問題中發布的代碼中的所有可能的異常。 我的代碼只捕獲“requests.exceptions.RequestException”，任何其他異常都會導致代碼突然退出。

相反，我要重寫這樣的代碼：

try:
        r = requests.post(URL, data=params, headers=headers, timeout=self.request_timeout)
        try:
            response = r.json()
        except Exception, e:
            message = "ERROR_0104! Unexpected error occured. The error is: "
            message += str(e)
            print message
            aux_func.write_log(message)
            return 'Switch'
except requests.exceptions.RequestException:
        print "Exception occurred on 'API requests post' procedure."
        counter += 1
        continue
except Exception, e:
        print "Exception {0} occurred".format(e)
        continue

我所做的就是在最后添加一個額外的通用異常捕獲器，它將捕獲所有其他未解釋的異常。

我希望這有幫助。

謝謝。

Answer 3

except Exception, e不適用於> = Python 3 except Exception as e你必須使用它