Simon Breton Simon Breton - 1 month ago 17
Node.js Question

'refreshToken_' error with "promisified" Google Analytics's jwt client

I'm trying to call Google Analytics API within an express/React/d3 project. I'm getting close to make all this work however I still need to deal with async callback on the jwtClient to make the GA API call. As you will see in my code, I'm using a

promise
with
bluebird
to deal with my jwtClient however I've got the following error :

Cannot read property 'refreshToken_' of undefined


Since I'm still a beginners and I'm just discovering the concept of promise I would love some help.

Here is my code ;

var google = require ("googleapis");
var key = require ('./client_id.json');
const Promise = require('bluebird');
var authorizationPromise;

const VIEW_ID = 'ga:80820965';

let jwtClient = new google.auth.JWT(
key.client_email,
null,
key.private_key,
['https://www.googleapis.com/auth/analytics.readonly'],
null
);

authorizationPromise = Promise.promisify(jwtClient.authorize)()
.then(function (err, tokens) {
if (err) {
throw new Error(err);
}

return google.analytics('v3');
})
.catch(function(err) {
console.log(err);
});

var queryData = function() {
authorizationPromise.then(function(analytics) {
analytics.data.ga.get({
'auth': jwtClient,
'ids': VIEW_ID,
'metrics': 'ga:uniquePageviews',
'dimensions': 'ga:pagePath',
'start-date': '30daysAgo',
'end-date': 'yesterday',
'sort': '-ga:uniquePageviews',
'max-results': 10,
}, function (err, response) {
if (err) {
console.log(err);
return;
}
console.log(JSON.stringify(response, null, 4));
});
});
};

module.exports = {
queryData
};


Someone help me to write this code but I don't really understand this
tokens
variable...

thanks.

Answer

Try changing

Promise.promisify(jwtClient.authorize)()

to

Promise.promisify(jwtClient.authorize, {context:jwtClient})()

Also, your .then(function(err,token) should be just .then(function(tokens) since the err is handled by the .catch