2小时后Google Drive Python API可恢复上传错误401

Question

首先，很抱歉，这是一个太愚蠢的问题……这是我第一次尝试使用此脚本中涉及的任何技术（Python，驱动器api，oauth
2.0等）。我发誓我一直在搜索并尝试这个问题大约一个星期，然后再发布问题。呵呵呵

我正在尝试使用google-api-python-client上传仅在终端机Linux
Debian上的大文件（3.5GiB）。我已经成功上传了小文件，但是当我尝试上传大文件时，上传开始后出现HTTP
401错误（未经授权）后，停止了大约1〜2小时。我一直在寻找如何获取新的访问令牌，但收效甚微。

到目前为止，这是我的（ 更新的 ）代码：

#!/usr/bin/python

import httplib2
import pprint
import time

from apiclient.discovery import build
from apiclient.http import MediaFileUpload
from apiclient import errors
from oauth2client.client import OAuth2WebServerFlow

# Copy your credentials from the APIs Console
CLIENT_ID = 'myclientid'
CLIENT_SECRET = 'myclientsecret'

# Check https://developers.google.com/drive/scopes for all available scopes
OAUTH_SCOPE = 'https://www.googleapis.com/auth/drive'

# Redirect URI for installed apps
REDIRECT_URI = 'urn:ietf:wg:oauth:2.0:oob'

# Run through the OAuth flow and retrieve credentials
flow = OAuth2WebServerFlow(CLIENT_ID, CLIENT_SECRET, OAUTH_SCOPE, REDIRECT_URI)
authorize_url = flow.step1_get_authorize_url()
print 'Go to the following link in your browser: ' + authorize_url
code = raw_input('Enter verification code: ').strip()
credentials = flow.step2_exchange(code)

# Create an httplib2.Http object and authorize it with our credentials
http = httplib2.Http()
http = credentials.authorize(http)

drive_service = build('drive', 'v2', http=http)

# Insert a file
media_body = MediaFileUpload('bigfile.zip', mimetype='application/octet-stream', chunksize=1024*256, resumable=True)
body = {
    'title': 'bigfile.zip',
    'description': 'Big File',
    'mimeType': 'application/octet-stream'
}

retries = 0
request = drive_service.files().insert(body=body, media_body=media_body)
response = None
while response is None:
    try:
            print http.request.credentials.access_token
            status, response = request.next_chunk()
            if status:
                    print "Uploaded %.2f%%" % (status.progress() * 100)
                    retries = 0
    except errors.HttpError, e:
            if e.resp.status == 404:
                    print "Error 404! Aborting."
                    exit()
            else:   
                    if retries > 10:
                            print "Retries limit exceeded! Aborting."
                            exit()
                    else:   
                            retries += 1
                            time.sleep(2**retries)
                            print "Error (%d)... retrying." % e.resp.status
                            continue
print "Upload Complete!"

经过一番挖掘，我发现授权的http对象在收到401之后会自动刷新访问令牌。尽管它确实在更改访问令牌，但仍没有按预期继续上传…请参见以下输出：

ya29.AHES6ZTo_-0oDqwn3JnU2uCR2bRjpRGP0CSQSMHGr6KvgEE
Uploaded 2.28%
ya29.AHES6ZTo_-0oDqwn3JnU2uCR2bRjpRGP0CSQSMHGr6KvgEE
Uploaded 2.29%
ya29.AHES6ZTo_-0oDqwn3JnU2uCR2bRjpRGP0CSQSMHGr6KvgEE
Uploaded 2.29%
ya29.AHES6ZTo_-0oDqwn3JnU2uCR2bRjpRGP0CSQSMHGr6KvgEE
Uploaded 2.30%
ya29.AHES6ZTo_-0oDqwn3JnU2uCR2bRjpRGP0CSQSMHGr6KvgEE
Error (401)... retrying.
ya29.AHES6ZQqp3_qbWsTk4yVDdHnlwc_7GvPZiFIReDnhIIiHao
Error (401)... retrying.
ya29.AHES6ZSqx90ZOUKqDEP4AAfWCVgXZYT2vJAiLwKDRu87JOs
Error (401)... retrying.
ya29.AHES6ZTp0RZ6U5K5UdDom0gq3XHnyVS-2sVU9hILOrG4o3Y
Error (401)... retrying.
ya29.AHES6ZSR-IOiwJ_p_Dm-OnCanVIVhCZLs7H_pYLMGIap8W0
Error (401)... retrying.
ya29.AHES6ZRnmM-YIZj4S8gvYBgC1M8oYy4Hv5VlcwRqgnZCOCE
Error (401)... retrying.
ya29.AHES6ZSF7Q7C3WQYuPAWrxvqbTRsipaVKhv_TfrD_gef1DE
Error (401)... retrying.
ya29.AHES6ZTsGzwIIprpPhCrqmoS3UkPsRzst5YHqL-zXJmz6Ak
Error (401)... retrying.
ya29.AHES6ZSS_1ZBiQJvZG_7t5uW3alsy1piGe4-u2YDnwycVrI
Error (401)... retrying.
ya29.AHES6ZTLFbBS8mSFWQ9zK8cgbX8RPeLghPxkfiKY54hBB-0
Error (401)... retrying.
ya29.AHES6ZQBeMWY50z6fWXvaCcd5_AJr_AYOuL2aiNKpK-mmyU
Error (401)... retrying.
ya29.AHES6ZTs2mYYSEyOqI_Ms4itKDx36t39Oc5RNZHkV4Dq49c
Retries limit exceeded! Aborting.

我正在使用安装了Python 2.5.2的debian lenny，并在大约一周前通过pip install安装了ssl和google-api-
python-client。

在此先感谢您的帮助。

编辑： 显然，问题不在于api。我尝试了与上面相同的代码，但是有两个小文件，它们之间有1h（system.sleep（））。输出为：

ya29.AHES6ZRUssiLfuhqCP9Cu7C7LuhRV2rYzPldU27wiMJZWb8
Uploaded 66.89%
ya29.AHES6ZRUssiLfuhqCP9Cu7C7LuhRV2rYzPldU27wiMJZWb8
Upload 1 Complete!
ya29.AHES6ZRUssiLfuhqCP9Cu7C7LuhRV2rYzPldU27wiMJZWb8
Uploaded 57.62%
ya29.AHES6ZQd3o1ciwXpNFImH3CK0-dJAtQba_oeIO9DDbIq154
Upload 2 Complete!

对于第二次上传，成功使用了新的访问令牌。那么，可恢复会话可能会在一段时间后到期，或者仅对特定的访问令牌有效吗？

Answer 1

我在google-api-python-client项目上提出了一个问题，据来自Google的Joe Gregorio称，问题出在后端：

“这是后端的问题，而不是API或代码的问题。据推断，如果上载时间过长，access_token会过期，此时无法继续进行可恢复的上载。立即修复此问题，一旦在服务器端修复此问题，我将更新此错误。”