Raspberry Pi POST数据失败，超过了最大重试次数

Question

我在Pi上运行Python脚本，该脚本每分钟向我的LCN主服务器发送数据的POST请求，PHP文件在其中将数据存储到数据库中。在一天中的大部分时间里，一切正常，但在晚上，程序崩溃，并且最大重试次数超过了。我希望这是大约午夜，因为我总是在午夜的FTP连接上遇到LCN问题。

是否可以继续重试或断开连接，然后重新连接并重试。

我的Python脚本在下面。

while 1:
    second = dt.now().second
    min = dt.now().minute
    hour = dt.now().hour

    if (hour == 00) and (min == 00) and (second < 5):
        totalTemp = []
        average = 0

    if (second == 0):
        CurrentTemp = readTemp(probeTemp)
        print ("current temp : %s" % CurrentTemp)
        totalTemp.append(CurrentTemp)
        average = round(sum(totalTemp) / len(totalTemp), 1)
        print ("average temp: %s" % average)
        myobj = {'curentTemp': CurrentTemp, 'averageTemp': average}
        x = requests.post(url, data = myobj)
        time.sleep(3)

这是我在终端中遇到的完整错误

Traceback (most recent call last):
  File "homeTemp.py", line 37, in <module>
    x = requests.post(url, data = myobj)
  File "/usr/lib/python2.7/dist-packages/requests/api.py", line 116, in post
    return request('post', url, data=data, json=json, **kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/api.py", line 60, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 533, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 646, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/adapters.py", line 516, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='dansonrunners.uk', port=80): Max retries exceeded with url: /weatherStation/insertDB.php (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x75d7ec10>: Failed to establish a new connection: [Errno 110] Connection timed out',))

Answer 1

您可以用try-except包围requestpart，以防止python-script崩溃，如下所示

try:
    x = requests.post(url, data = myobj)

except(Exception as e): 
# can replaced with an detailed exception like requests.exceptions.*
    print(e)