Gmail API认证时出现URI不匹配404错误求助

调用以下Python代码中的gmail_authenticate()函数进行Gmail API认证时，出现URI不匹配的404错误。已在Google云控制台添加回调URI，但问题仍未解决。

相关代码 #

def gmail_authenticate():
    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_path, 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)

    # Build the Gmail service, Connect to the Gmail API
    service = build('gmail', 'v1', credentials=creds)
    return service

Google云控制台配置截图 #

解决方法 #

• 纠正OAuth客户端类型：代码中使用run_local_server(port=0)属于桌面应用认证流程，你当前配置的是网页应用类型的回调URI，两者不兼容。需要在Google云控制台重新创建桌面应用类型的OAuth客户端ID，该类型无需手动填写回调URI，系统会自动适配localhost随机端口。
• 清理旧凭据：删除本地的token.pickle文件，旧凭据是基于错误的客户端配置生成的，必须清除后重新运行认证流程。
• 替换密钥文件：确保代码中credentials_path指向新创建的桌面应用对应的credentials.json文件，不要继续使用旧的网页应用密钥文件。

内容的提问来源于stack exchange，提问作者Diana Brook