我正在使用googles官方oauth2client.client访问google plus api。我有一个存储在数据库中的刷新令牌（不会过期），需要从中重新创建临时“凭据”（访问令牌）。
但我无法找到一种方法来与谷歌提供的官方图书馆这样做。
所以我讨厌它：使用urllib访问API，从refresh_token给我一个新的access_token。使用access_token我可以使用该库。
我肯定错过了什么！
from apiclient import discovery
from oauth2client.client import AccessTokenCredentials
from urllib import urlencode
from urllib2 import Request , urlopen, HTTPError
import json
# ==========================================
def access_token_from_refresh_token(client_id, client_secret, refresh_token):
request = Request('https://accounts.google.com/o/oauth2/token',
data=urlencode({
'grant_type': 'refresh_token',
'client_id': client_id,
'client_secret': client_secret,
'refresh_token': refresh_token
}),
headers={
'Content-Type': 'application/x-www-form-urlencoded',
'Accept': 'application/json'
}
)
response = json.load(urlopen(request))
return response['access_token']
# ==========================================
access_token = access_token_from_refresh_token(CLIENT_ID, CLIENT_SECRET, REFRESH_TOKEN)
# now I can use the library properly
credentials = AccessTokenCredentials(access_token, "MyAgent/1.0", None)
http = credentials.authorize(httplib2.Http())
service = discovery.build('plus', 'v1', http=http)
google_request = service.people().get(userId='me')
result = google_request.execute(http=http)
我用：oauth2client.client.GoogleCredentials
cred = oauth2client.client.GoogleCredentials(access_token,client_id,client_secret,
refresh_token,expires_at,"https://accounts.google.com/o/oauth2/token",some_user_agent)
http = cred.authorize(httplib2.Http())
cred.refresh(http)
self.gmail_service = discovery.build('gmail', 'v1', credentials=cred)
我很容易解决这个问题（你肯定想念this documentation）。这是我的代码片段，尝试使用Picasa API从活动用户获取所有相册：
http = httplib2.Http(ca_certs=os.environ['REQUESTS_CA_BUNDLE'])
try:
http = self.oauth.credentials.authorize(http)
response, album_list = http.request(Picasa.PHOTOS_URL, 'GET')
if response['status'] == '403':
self.oauth.credentials.refresh(http)
response, album_list = http.request(Picasa.PHOTOS_URL, 'GET')
album_list = json.load(StringIO(album_list))
except Exception as ex:
Logger.debug('Picasa: error %s' % ex)
return {}
使用来自refresh的oauth2client.client.OAuth2Credentials方法。我认为使用if response['status'] != '200'甚至可以。得检查一下！
你可以像这样直接构造一个OAuth2Credentials实例：
import httplib2
from oauth2client import GOOGLE_REVOKE_URI, GOOGLE_TOKEN_URI, client
CLIENT_ID = '<client_id>'
CLIENT_SECRET = '<client_secret>'
REFRESH_TOKEN = '<refresh_token>'
credentials = client.OAuth2Credentials(
access_token=None, # set access_token to None since we use a refresh token
client_id=CLIENT_ID,
client_secret=CLIENT_SECRET,
refresh_token=REFRESH_TOKEN,
token_expiry=None,
token_uri=GOOGLE_TOKEN_URI,
user_agent=None,
revoke_uri=GOOGLE_REVOKE_URI)
credentials.refresh(httplib2.Http()) # refresh the access token (optional)
print(credentials.to_json())
http = credentials.authorize(httplib2.Http()) # apply the credentials
我推荐这种方法。
from oauth2client import client, GOOGLE_TOKEN_URI
CLIENT_ID = "client_id"
CLIENT_SECRET = "client_secret"
REFRESH_TOKEN = "refresh_token"
credentials = client.OAuth2Credentials(
access_token = None,
client_id = CLIENT_ID,
client_secret = CLIENT_SECRET,
refresh_token = REFRESH_TOKEN,
token_expiry = None,
token_uri = GOOGLE_TOKEN_URI,
token_ id = None,
revoke_uri= None)
http = credentials.authorize(httplib2.Http())
即使访问令牌已过期，由于刷新令牌，凭证仍然是授权的。
您可以存储整个凭据，而不仅仅是刷新令牌：
json = credentials.to_json()
credentials = Credentials.new_from_json(json)
看看这样做的Storage object。
如果您使用google-auth使用2018 Youtube Python Quickstart demo app，则无法使用oauth2client的存储空间。
So here is the correct way of storing the credentials
以下是google-auth的部分工作解决方案，错过了令牌过期情况的正确处理：
import os
import json
import os.path
import google.oauth2.credentials
from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError
from google_auth_oauthlib.flow import InstalledAppFlow
CLIENT_SECRETS_FILE = "client_secret.json"
SCOPES = ['https://www.googleapis.com/auth/youtube.force-ssl']
API_SERVICE_NAME = 'youtube'
API_VERSION = 'v3'
def get_authenticated_service():
if os.path.isfile("credentials.json"):
with open("credentials.json", 'r') as f:
creds_data = json.load(f)
creds = Credentials(creds_data['token'])
else:
flow = InstalledAppFlow.from_client_secrets_file(CLIENT_SECRETS_FILE, SCOPES)
creds = flow.run_console()
creds_data = {
'token': creds.token,
'refresh_token': creds.refresh_token,
'token_uri': creds.token_uri,
'client_id': creds.client_id,
'client_secret': creds.client_secret,
'scopes': creds.scopes
}
print(creds_data)
with open("credentials.json", 'w') as outfile:
json.dump(creds_data, outfile)
return build(API_SERVICE_NAME, API_VERSION, credentials = creds)
def channels_list_by_username(service, **kwargs):
results = service.channels().list(**kwargs).execute()
print('This channel\'s ID is %s. Its title is %s, and it has %s views.' %
(results['items'][0]['id'],
results['items'][0]['snippet']['title'],
results['items'][0]['statistics']['viewCount']))
if __name__ == '__main__':
os.environ['OAUTHLIB_INSECURE_TRANSPORT'] = '1'
service = get_authenticated_service()
channels_list_by_username(service, part='snippet,contentDetails,statistics', forUsername='GoogleDevelopers')
哇.. 2岁的问题，而不是一个好的答案..毫不奇怪，因为谷歌文件是关于此的废话。
正确的方法是扩展Storage class oauth2client.client.Storage
一个示例实现（使用mongodb集合_google_credentials）将是这样的：
class Storage(oauth2client.client.Storage):
def __init__(self, key):
super(Storage, self).__init__()
self._key = key
def locked_get(self):
if not self._key: return None
data = _google_credentials.find_one({'_id': self._key})
if not data: return None
credentials = oauth2client.client.Credentials.new_from_json(json.dumps(data))
credentials.set_store(self)
return credentials
def locked_put(self, credentials):
data = json.loads(credentials.to_json())
_google_credentials.update_one({'_id': self._key}, {'$set': data},
upsert=True)
credentials.set_store(self)
def locked_delete(self):
bucket.delete(self._key)
然后，当您最初获得step2_exchange之后的凭据时，您需要使用Storage().put存储它们：
e.g：
credentials = flow.step2_exchange(code)
Storage(user_id).put(credentials)
当您再次需要凭据时，只需执行以下操作：
credentials = Storage(user_id).get()
如果有人正在寻找如何使用google_auth_oauthlib刷新令牌的答案，以下内容适用于我：
flow.oauth2session.refresh_token(flow.client_config['token_uri'],
refresh_token=refresh_token,
client_id=<MY_CLIENT_ID>,
client_secret=flow.client_config['client_secret'])
creds = google_auth_oauthlib.helpers.credentials_from_session(
flow.oauth2session, flow.client_config)
我找不到记录在哪里的任何地方。