我目前正在研究一个使用树莓pi3进行延时拍摄的项目（效果很好，拍摄照片没问题）。
但是，我使用另一个脚本将这些照片上传到了保管箱帐户，并且一切正常，直到我今天将其签出，并看到超时错误。
有人知道如何解决吗？
这是错误：
Traceback (most recent call last):
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/contrib/pyopenssl.py", line 453, in wrap_socket
cnx.do_handshake()
File "/usr/lib/python3/dist-packages/OpenSSL/SSL.py", line 1426, in do_handshake
self._raise_ssl_error(self._ssl, result)
File "/usr/lib/python3/dist-packages/OpenSSL/SSL.py", line 1149, in _raise_ssl_error
raise WantReadError()
OpenSSL.SSL.WantReadError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 343, in _make_request
self._validate_conn(conn)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 839, in _validate_conn
conn.connect()
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connection.py", line 344, in connect
ssl_context=context)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/util/ssl_.py", line 344, in ssl_wrap_socket
return context.wrap_socket(sock, server_hostname=server_hostname)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/contrib/pyopenssl.py", line 456, in wrap_socket
raise timeout('select timed out')
socket.timeout: select timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/pi/.local/lib/python3.5/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 638, in urlopen
_stacktrace=sys.exc_info()[2])
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/util/retry.py", line 367, in increment
raise six.reraise(type(error), error, _stacktrace)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/packages/six.py", line 686, in reraise
raise value
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 600, in urlopen
chunked=chunked)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 346, in _make_request
self._raise_timeout(err=e, url=url, timeout_value=conn.timeout)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 306, in _raise_timeout
raise ReadTimeoutError(self, url, "Read timed out. (read timeout=%s)" % timeout_value)
urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='content.dropboxapi.com', port=443): Read timed out. (read timeout=30)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/pi/Desktop/time/picture/drop.py", line 16, in <module>
response = db.files_upload(f.read(), dname)
File "/home/pi/.local/lib/python3.5/site-packages/dropbox/base.py", line 2293, in files_upload
f,
File "/home/pi/.local/lib/python3.5/site-packages/dropbox/dropbox.py", line 274, in request
timeout=timeout)
File "/home/pi/.local/lib/python3.5/site-packages/dropbox/dropbox.py", line 365, in request_json_string_with_retry
timeout=timeout)
File "/home/pi/.local/lib/python3.5/site-packages/dropbox/dropbox.py", line 449, in request_json_string
timeout=timeout,
File "/home/pi/.local/lib/python3.5/site-packages/requests/sessions.py", line 581, in post
return self.request('POST', url, data=data, json=json, **kwargs)
File "/home/pi/.local/lib/python3.5/site-packages/requests/sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "/home/pi/.local/lib/python3.5/site-packages/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/home/pi/.local/lib/python3.5/site-packages/requests/adapters.py", line 529, in send
raise ReadTimeout(e, request=request)
requests.exceptions.ReadTimeout: HTTPSConnectionPool(host='content.dropboxapi.com', port=443): Read timed out. (read timeout=30)
>>>
这是在保管箱上载的代码的样子：
import dropbox
from time import sleep
db = dropbox.Dropbox('apikeyplaceholder')
for i in range(4500): ##4500
name = 'image{0:04d}.jpg'
fname = '/home/pi/Desktop/time/picture/'+name.format(i)
dname = '/'+name.format(i)
f = open(fname, 'rb')
response = db.files_upload(f.read(), dname)
print ('uploaded:', response)
sleep(585)
f.close()
新错误：
Traceback (most recent call last):
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/contrib/pyopenssl.py", line 317, in _send_until_done
return self.connection.send(data)
File "/usr/lib/python3/dist-packages/OpenSSL/SSL.py", line 1256, in send
self._raise_ssl_error(self._ssl, result)
File "/usr/lib/python3/dist-packages/OpenSSL/SSL.py", line 1151, in _raise_ssl_error
raise WantWriteError()
OpenSSL.SSL.WantWriteError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 600, in urlopen
chunked=chunked)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 354, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.5/http/client.py", line 1107, in request
self._send_request(method, url, body, headers)
File "/usr/lib/python3.5/http/client.py", line 1152, in _send_request
self.endheaders(body)
File "/usr/lib/python3.5/http/client.py", line 1103, in endheaders
self._send_output(message_body)
File "/usr/lib/python3.5/http/client.py", line 936, in _send_output
self.send(message_body)
File "/usr/lib/python3.5/http/client.py", line 908, in send
self.sock.sendall(data)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/contrib/pyopenssl.py", line 328, in sendall
sent = self._send_until_done(data[total_sent:total_sent + SSL_WRITE_BLOCKSIZE])
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/contrib/pyopenssl.py", line 320, in _send_until_done
raise timeout()
socket.timeout
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/pi/.local/lib/python3.5/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 638, in urlopen
_stacktrace=sys.exc_info()[2])
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/util/retry.py", line 367, in increment
raise six.reraise(type(error), error, _stacktrace)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/packages/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 600, in urlopen
chunked=chunked)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/connectionpool.py", line 354, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.5/http/client.py", line 1107, in request
self._send_request(method, url, body, headers)
File "/usr/lib/python3.5/http/client.py", line 1152, in _send_request
self.endheaders(body)
File "/usr/lib/python3.5/http/client.py", line 1103, in endheaders
self._send_output(message_body)
File "/usr/lib/python3.5/http/client.py", line 936, in _send_output
self.send(message_body)
File "/usr/lib/python3.5/http/client.py", line 908, in send
self.sock.sendall(data)
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/contrib/pyopenssl.py", line 328, in sendall
sent = self._send_until_done(data[total_sent:total_sent + SSL_WRITE_BLOCKSIZE])
File "/home/pi/.local/lib/python3.5/site-packages/urllib3/contrib/pyopenssl.py", line 320, in _send_until_done
raise timeout()
urllib3.exceptions.ProtocolError: ('Connection aborted.', timeout())
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/pi/Desktop/time/bild/drop.py", line 20, in <module>
response = upload(f, dname)
File "/usr/local/lib/python3.5/dist-packages/backoff/_sync.py", line 94, in retry
ret = target(*args, **kwargs)
File "/home/pi/Desktop/time/bild/drop.py", line 11, in upload
return db.files_upload(f.read(), dname)
File "/home/pi/.local/lib/python3.5/site-packages/dropbox/base.py", line 2293, in files_upload
f,
File "/home/pi/.local/lib/python3.5/site-packages/dropbox/dropbox.py", line 274, in request
timeout=timeout)
File "/home/pi/.local/lib/python3.5/site-packages/dropbox/dropbox.py", line 365, in request_json_string_with_retry
timeout=timeout)
File "/home/pi/.local/lib/python3.5/site-packages/dropbox/dropbox.py", line 449, in request_json_string
timeout=timeout,
File "/home/pi/.local/lib/python3.5/site-packages/requests/sessions.py", line 581, in post
return self.request('POST', url, data=data, json=json, **kwargs)
File "/home/pi/.local/lib/python3.5/site-packages/requests/sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "/home/pi/.local/lib/python3.5/site-packages/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/home/pi/.local/lib/python3.5/site-packages/requests/adapters.py", line 498, in send
raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', timeout())
答案 0 :(得分：0)
在实现代码以处理超时之前，首先需要考虑如何处理超时。常见的策略如下：
根据您的设置，您可能希望将上传代码放在单独的线程中，以使上传过程中的延迟不会干扰捕获照片。
使用我上面链接到的backoff库的一个简单示例（未经测试）：
from time import sleep
import backoff
import dropbox
import requests
db = dropbox.Dropbox('apikeyplaceholder')
@backoff.on_exception(backoff.expo, requests.exceptions.ReadTimeout)
def upload(f, name):
return db.files_upload(f.read(), dname)
NAME_PATTERN = '/image{0:04d}.jpg'
for i in range(4500):
name = NAME_PATTERN.format(i)
fname = '/home/pi/Desktop/time/picture' + name
with open(fname, 'rb') as f:
response = upload(f, name)
print ('uploaded:', response)
sleep(585)