A video example

[IRediTOTO]

Hi, if you have time, can you make a video for this :( This too hard to use for me, I think.

[byeokim]

Sorry I can't. By the way could you tell me what problem are you having?

[IRediTOTO]

I am not sure, so hard to say. Google ping to my api every second. Your code look work but look like problem from my setup google. So I quit and trying to check email by call api every minutes from my backend... :(

[byeokim]

Was the req.body something like this?

{
  message: {
    data: 'eyJlbWFpbEFkZHJlc3MiOiJ1c2VyMUBnbWFpbC5jb20iLCJoaXN0b3J5SWQiOiI5ODc2NTQzMjEwIn0=',
    messageId: '1234567890',
    message_id: '1234567890',
    publishTime: '2020-07-18T00:11:23.000Z',
    publish_time: '2020-07-18T00:11:23.000Z'
  },
  subscription: 'projects/PROJECT_NAME/subscriptions/SUBSCRIPTION_NAME'
}

[IRediTOTO]

yes, right. I want google ping my api when it have email. That will make my life more easier. Still fight with cronjob here 🗡️

[byeokim]

Then what did console.log(err); print when you put your console.log(err); like this:

app.post(
  '/pubsub-push-endpoint',
  express.json(),
  (req, res) => {
    res.sendStatus(200);
    const email = gmailpush.getEmailAddress(req.body);
    const token = users.find((user) => user.email === email).token;
    gmailpush
      .getMessages({
        notification: req.body,
        token
      })
      .then((messages) => {
        console.log(messages);
      })
      .catch((err) => {
        console.log(err);
      });
  }
);

[IRediTOTO]

I do same with you, but gmailpush didnt show anything, just console.log("req.body", req.body); show the message you said

handler.post((req, res) => {
   res.status(200).end()
   console.log("req.body", req.body);  // just this show 
   const email = gmailpush.getEmailAddress(req.body);
   console.log("email", email);
   const token = users.find((user) => user.email === email).token;

   gmailpush
      .getMessages({
         notification: req.body,
         token,
         withLabelIds: ["UNREAD"],
      })
      .then((messages) => {
         console.log("messages ", messages);
      })
      .catch((err) => {
         console.error("error ", err);
      });
});

Look like gmailpush not run, no error or something. Hmm.

[IRediTOTO]

btw, do I need to run email watch for pubsub?

gmail.users.watch({
    userId:"me",
    labelIds:["UNREAD"],
    topicName:"projects/checkmail-283408/topics/MyTopic"
})

When I run I got this: User not authorized to perform this action. I use my email and my email own all project :\ Why gg don't let me watch ?

[IRediTOTO]

Look like it worked. Thank you for push me. 💯

can you tell me how can authorized for an email? I just use my email access_token to run watch() to get notification

[byeokim]

can you tell me how can authorized for an email? I just use my email access_token to run watch() to get notification

I don't understand what you meant. The following code will print out url for getting authorization from Gmail user. You can visit the url by yourself for your Gmail account or give it to other Gmail user for the user to authorize your app to receive notifications from the user's Gmail inbox.

const readline = require('readline');
const {google} = require('googleapis');

function getToken() {
  const auth = new google.auth.OAuth2(
    CLIENT_ID,
    CLIENT_SECRET,
    'urn:ietf:wg:oauth:2.0:oob'
  );

  const authUrl = auth.generateAuthUrl({
    access_type: 'offline',
    scope: ['https://www.googleapis.com/auth/gmail.readonly'],
  });

  console.log('Authorize this app by visiting this url:');
  console.log(authUrl);

  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
  });

  rl.question('Enter the code from that page here: ', (authCode) => {
    rl.close();
    auth.getToken(authCode, (err, token) => {
      if (err) {
        return console.log('Error retrieving access token', err);
      }

      console.log('Token:');
      console.log(token);
    });
  });
}

getToken();