谷歌日历API开始

Question

我正在努力熟悉谷歌日历api。在入门指南中，他们有以下代码示例：

from __future__ import print_function
import datetime
import pickle
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/calendar.readonly']

def main():
"""Shows basic usage of the Google Calendar API.
Prints the start and name of the next 10 events on the user's calendar.
"""
creds = None
# The file token.pickle stores the user's access and refresh tokens, and is
# created automatically when the authorization flow completes for the first
# time.
if os.path.exists('token.pickle'):
with open('token.pickle', 'rb') as token:
creds = pickle.load(token)
# If there are no (valid) credentials available, let the user log in.
if not creds or not creds.valid:
if creds and creds.expired and creds.refresh_token:
creds.refresh(Request())
else:
flow = InstalledAppFlow.from_client_secrets_file(
'credentials.json', SCOPES)
creds = flow.run_local_server(port=0)
# Save the credentials for the next run
with open('token.pickle', 'wb') as token:
pickle.dump(creds, token)
service = build('calendar', 'v3', credentials=creds)
# Call the Calendar API
now = datetime.datetime.utcnow().isoformat() + 'Z' # 'Z' indicates UTC time
print('Getting the upcoming 10 events')
events_result = service.events().list(calendarId='primary', timeMin=now,
maxResults=10, singleEvents=True,
orderBy='startTime').execute()
events = events_result.get('items', [])
if not events:
print('No upcoming events found.')
for event in events:
start = event['start'].get('dateTime', event['start'].get('date'))
print(start, event['summary'])

if __name__ == '__main__':
main()

在这个例子中，如果我们还没有通过pickle文件的访问权限，我们会自动打开一个窗口，要求用户访问他们的日历。问题是我不希望这个窗口自动打开，我想打印一个链接，用户可以点击它进行身份验证。我查阅了文件，但似乎找不到任何有用的东西。我会通知任何我能得到的帮助，谢谢！

Answer 1

• 对于授权过程，您只需要显示URL。您不希望自动打开浏览器
• 您希望使用带有python的googleapi来实现这一点

如果我的理解是正确的，这个答案怎么样？请将此视为几种可能的答案之一。

在这种情况下，请使用Flow.from_client_secrets_file而不是InstalledAppFlow.from_client_secrets_file。

修改的脚本：

修改脚本时，请按如下方式进行修改。

发件人：

from google_auth_oauthlib.flow import InstalledAppFlow

收件人：

from google_auth_oauthlib.flow import Flow

和

发件人：

if os.path.exists('token.pickle'):
with open('token.pickle', 'rb') as token:
creds = pickle.load(token)
# If there are no (valid) credentials available, let the user log in.
if not creds or not creds.valid:
if creds and creds.expired and creds.refresh_token:
creds.refresh(Request())
else:
flow = InstalledAppFlow.from_client_secrets_file(
'credentials.json', SCOPES)
creds = flow.run_local_server(port=0)
# Save the credentials for the next run
with open('token.pickle', 'wb') as token:
pickle.dump(creds, token)
service = build('calendar', 'v3', credentials=creds)

收件人：

if os.path.exists('token.pickle'):
with open('token.pickle', 'rb') as token:
creds = pickle.load(token)
# If there are no (valid) credentials available, let the user log in.
if not creds or not creds.valid:
if creds and creds.expired and creds.refresh_token:
creds.refresh(Request())
else:
# Create the flow using the client secrets file from the Google API
# Console.
flow = Flow.from_client_secrets_file('client_secret.json', SCOPES, redirect_uri='urn:ietf:wg:oauth:2.0:oob')
# Tell the user to go to the authorization URL.
auth_url, _ = flow.authorization_url(prompt='consent')
print('Please go to this URL: {}'.format(auth_url))
# The user will get an authorization code. This code is used to get the
# access token.
code = input('Enter the authorization code: ')
flow.fetch_token(code=code)
creds = flow.credentials
# Save the credentials for the next run
with open('token.pickle', 'wb') as token:
pickle.dump(creds, token)
service = build('calendar', 'v3', credentials=creds)

• 在这种情况下，当您在token.pickle下运行脚本时，授权的URL将显示在控制台上。浏览器未打开。因此，请打开浏览器访问URL并授权作用域。然后，请将复制的授权码输入控制台并输入回车键。由此，检索访问令牌并创建token.pickle的文件

注意：

• 如果发生与重定向uri相关的错误，请将其修改为http://localhost并再次测试

参考：

• google_auth_oauthlib.flow模块

如果我误解了你的问题，而这不是你想要的方向，我道歉。

已添加：

• 根据您问题中的I want to print a link instead that the user can click to authenticate，我提出了上述示例脚本
• 从你回复的some way not to manually confirm authorization codes来看，我认为上面的示例脚本不合适

在这种情况下，使用服务帐户如何？使用服务帐户时，不需要授权代码。使用服务帐户的脚本如下所示。

示例脚本：

from google.oauth2 import service_account
from googleapiclient.discovery import build
SERVICE_ACCOUNT_FILE = 'service-account-credentials.json'  # Here, please set the creadential file of the service account.
SCOPES = ['https://www.googleapis.com/auth/calendar.readonly']
creds = service_account.Credentials.from_service_account_file(SERVICE_ACCOUNT_FILE, scopes=SCOPES)
service = build('calendar', 'v3', credentials=creds)

注：

• 为了使用服务帐户访问谷歌日历，首先，请将谷歌日历与服务帐户的电子邮件共享。请小心

参考：

• 创建服务帐户