Google Calendar API 授权在本地主机上工作，但在 Heroku 上不工作答案

【问题标题】：Google Calendar API authorization working on localhost but not on HerokuGoogle Calendar API 授权在本地主机上工作，但在 Heroku 上不工作
【发布时间】：2021-12-01 02:05:34
【问题描述】：

我想为我的 Django 应用程序使用 Google Calendar API。我已按照此处的说明进行操作：https://karenapp.io/articles/how-to-automate-google-calendar-with-python-using-the-calendar-api/

我还在 Google API 中添加了重定向 uri - 似乎浏览器试图在服务器端打开（就像在本地一样，但我无法操作它，因为服务器端的浏览器没有显示向上）。在终端中，我确实看到“请访问此 URL 以授权此应用程序：https://accounts.google.com/..."

关于我能做什么的任何想法？

views.py 中的代码：

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

SCOPES = ['https://www.googleapis.com/auth/calendar']

CREDENTIALS_FILE = 'path_to_file/credentials.json'

def get_calendar_service():
   creds = None

   if os.path.exists('token.pickle'):
       with open('token.pickle', 'rb') as token:
           creds = pickle.load(token)

   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_FILE, SCOPES)
           creds = flow.run_local_server(port=0)

       with open('token.pickle', 'wb') as token:
           pickle.dump(creds, token)

   service = build('calendar', 'v3', credentials=creds)
   return service

【问题讨论】：

标签： python django heroku google-calendar-api google-api-python-client

【解决方案1】：

您遇到的问题是您正在使用已安装的应用程序流。

 flow = InstalledAppFlow.from_client_secrets_file(
               CREDENTIALS_FILE, SCOPES)
           creds = flow.run_local_server(port=0)

此代码专为与已安装的应用程序一起使用而设计，用于在当前运行它的机器上打开 Web 浏览器窗口。

Using OAuth 2.0 for Web Server Applications

import google.oauth2.credentials
import google_auth_oauthlib.flow

# Use the client_secret.json file to identify the application requesting
# authorization. The client ID (from that file) and access scopes are required.
flow = google_auth_oauthlib.flow.Flow.from_client_secrets_file(
    'client_secret.json',
    scopes=['https://www.googleapis.com/auth/drive.metadata.readonly'])

# Indicate where the API server will redirect the user after the user completes
# the authorization flow. The redirect URI is required. The value must exactly
# match one of the authorized redirect URIs for the OAuth 2.0 client, which you
# configured in the API Console. If this value doesn't match an authorized URI,
# you will get a 'redirect_uri_mismatch' error.
flow.redirect_uri = 'https://www.example.com/oauth2callback'

# Generate URL for request to Google's OAuth 2.0 server.
# Use kwargs to set optional request parameters.
authorization_url, state = flow.authorization_url(
    # Enable offline access so that you can refresh an access token without
    # re-prompting the user for permission. Recommended for web server apps.
    access_type='offline',
    # Enable incremental authorization. Recommended as a best practice.
    include_granted_scopes='true')

【讨论】：