Google Sites API + OAuth2（在Appengine上）

Question

我一直在尝试使用Python库来访问Google Sites的API。

第一步是需要用户授权我们的应用程序，他们推荐使用OAuth2，并提供了一个可以在这里找到的库。

在授权过程结束时，你会得到一个OAuth2Credentials对象。

问题是，当我尝试向Google Sites API发送请求时，比如我这样做：

import gdata.sites.client
client = gdata.sites.client.SitesClient(site=None, domain='mydomain.com')

我不知道怎么使用这个OAuth2Credentials对象。

Answer 1

我的应用程序使用的是.p12密钥，而不是流式处理。经过一些调整，我让它成功运行了，下面是我做的步骤：

from oauth2client.client import SignedJwtAssertionCredentials
import gdata.sites.client
import gdata.sites.data

scope = 'https://sites.google.com/feeds/'
key_file = 'xxxxxxxxxxxxxxxxxxx.p12'

with open(key_file) as f:
    key = f.read()

credentials = SignedJwtAssertionCredentials(
        'xxxxxxxxxxxxxxxxxxx@developer.gserviceaccount.com',
        key,
        sub='aleh@vaolix.com',
        scope=[scope])

auth2token = gdata.gauth.OAuth2TokenFromCredentials(credentials)
client = gdata.sites.client.SitesClient(source='sites-test',
                                        domain='mydomain.com')
auth2token.authorize(client)

feed = client.GetSiteFeed()

for entry in feed.entry:
    print entry.title.text

Answer 2

我花了不少时间才找到这个问题的答案，最后在一个博客帖子里找到了：

https://groups.google.com/forum/m/#!msg/google-apps-developer-blog/1pGRCivuSUI/3EAIioKp0-wJ

这里有一个完整的例子，展示了如何使用oauth2client和gdata API来访问Google Sites，包括“猴子补丁”的部分：

from oauth2client.client import flow_from_clientsecrets
from oauth2client.file import Storage
from oauth2client.tools import run
import gdata.sites.client
import gdata.sites.data

SCOPE = 'https://sites.google.com/feeds/'

# client_secrets.json is downloaded from the API console:
# https://code.google.com/apis/console/#project:<PROJECT_ID>:access
# where <PROJECT_ID> is the ID of your project

flow = flow_from_clientsecrets('client_secrets.json',
                               scope=SCOPE,
                               redirect_uri='http://localhost')

storage = Storage('plus.dat')
credentials = storage.get()

if credentials is None or credentials.invalid:
    credentials = run(flow, storage)

# 'Monkey Patch' the data in the credentials into a gdata OAuth2Token
# This is based on information in this blog post:
# https://groups.google.com/forum/m/#!msg/google-apps-developer-blog/1pGRCivuSUI/3EAIioKp0-wJ

auth2token = gdata.gauth.OAuth2Token(client_id=credentials.client_id,
  client_secret=credentials.client_secret,
  scope=SCOPE,
  access_token=credentials.access_token,
  refresh_token=credentials.refresh_token,
  user_agent='sites-test/1.0')

# Create a gdata client

client = gdata.sites.client.SitesClient(source='sites-test',
                                        site='YOUR.SITE',
                                        domain='YOUR.DOMAIN',
                                        auth_token=auth2token)

# Authorize it

auth2token.authorize(client)

# Call an API e.g. to get the site content feed

feed = client.GetContentFeed()

for entry in feed.entry:
    print '%s [%s]' % (entry.title.text, entry.Kind())