Gmail 推送通知 Python API答案

【问题标题】：Gmail push notifications Python APIGmail 推送通知 Python API
【发布时间】：2018-04-17 18:05:27
【问题描述】：

我正在尝试通过推送通知 API 在我的 Gmail 帐户中接收新邮件。我有一个带有 ssl 证书的服务器，我已经在 Google 中验证了它并添加到我的 Pub/Sub 项目中：

#!/usr/bin/python3

import http.server
import array
import ssl

class CallbackHTTPServer(http.server.HTTPServer):
    def server_activate(self):
        http.server.HTTPServer.server_activate(self)


class HttpProcessor(http.server.BaseHTTPRequestHandler):
    def add_OK_plain_text_header(self):
        self.send_response(200)
        self.send_header('content-type','text/plain')
        self.end_headers()


    def do_GET(self):
        self.add_OK_plain_text_header()
        print("GOT GET REQUEST")
        self.wfile.write("OK".encode('utf-8'))


    def do_POST(self):
        self.add_OK_plain_text_header()
        print("GOT POST REQUEST")
        self.wfile.write("OK".encode('utf-8'))


def main():
    httpd = CallbackHTTPServer(('', 443), HttpProcessor)
    httpd.socket = ssl.wrap_socket(httpd.socket, certfile='./server.pem', server_side=True)
    httpd.serve_forever()


if __name__ == "__main__":
    main()

我还创建了一个主题和订阅推送通知到我的服务器地址（如here 中所述）。我还按照here 中的描述初始化了 Gmail API，并运行了 Gmail API 监视请求，该请求以正确的 historyId 和过期时间进行响应。但是即使我通过将消息发布到我的主题来手动创建它们，我的服务器也没有得到任何更新：

#!/usr/bin/python

from __future__ import print_function
import httplib2
import os

from apiclient import discovery
from oauth2client import client
from oauth2client import tools
from oauth2client.file import Storage

try:
    import argparse
    flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
except ImportError:
    flags = None

# If modifying these scopes, delete your previously saved credentials
# at ~/.credentials/gmail-python-quickstart.json
SCOPES = 'https://www.googleapis.com/auth/gmail.readonly'
CLIENT_SECRET_FILE = 'client_secret.json'
APPLICATION_NAME = 'Gmail API Python Quickstart'


def get_credentials():
    """Gets valid user credentials from storage.

    If nothing has been stored, or if the stored credentials are invalid,
    the OAuth2 flow is completed to obtain the new credentials.

    Returns:
        Credentials, the obtained credential.
    """
    home_dir = os.path.expanduser('~')
    credential_dir = os.path.join(home_dir, '.credentials')
    if not os.path.exists(credential_dir):
        os.makedirs(credential_dir)
    credential_path = os.path.join(credential_dir,
                                   'gmail-python-quickstart.json')

    store = Storage(credential_path)
    credentials = store.get()
    if not credentials or credentials.invalid:
        flow = client.flow_from_clientsecrets(CLIENT_SECRET_FILE, SCOPES)
        flow.user_agent = APPLICATION_NAME
        if flags:
            credentials = tools.run_flow(flow, store, flags)
        else: # Needed only for compatibility with Python 2.6
            credentials = tools.run(flow, store)
        print('Storing credentials to ' + credential_path)
    return credentials

def main():
    credentials = get_credentials()
    http = credentials.authorize(httplib2.Http())
    service = discovery.build('gmail', 'v1', http=http)

    request = {
      'labelIds': ['INBOX'],
      'topicName': 'projects/################/topics/#######'
    }
    print(service.users().watch(userId='me', body=request).execute())


if __name__ == '__main__':
    main()

【问题讨论】：

检查您是否已授予 Gmail 权限以向您的主题发布通知，Cloud Pub/Sub 需要它。还要仔细检查document 中的每个步骤，看看你是否遗漏了什么。希望这会有所帮助。
是的，我授予了向 Gmail 发布通知的权限。我已经完成了您提供的文件的所有步骤。

标签： python ssl push-notification webserver gmail-api

【解决方案1】：

您是否已授予 Grant 针对您的主题的发布权限？ check out this link

或阅读：

授予您主题的发布权限 Cloud Pub/Sub 要求您授予 Gmail 权限以向您的主题发布通知。

为此，您需要授予发布权限 serviceAccount:gmail-api-push@system.gserviceaccount.com。你可以做这使用 Cloud Pub/Sub Developer Console 权限界面遵循资源级访问控制说明。

【讨论】：