I'm using Google Identity Services JavaScript API to access some of my Google data here:
https://developers.google.com/identity/oauth2/web/guides/migration-to-gis
The code I used is in this section:
Implicit flow examples > The new way > GAPI async/await.
I ran the code from a http://localhost:xxxx and I have added the domain and port to the related credentials.
Everything works fine:
- I can see my profile image and name after logging in.
- I can access the expected data after logging in.
But I have to log in again after refreshing the page.
Is there any way to keep the login status in my browser so that I don't have to click my username in that consent popup again and again repeatedly?
Code below:
<!DOCTYPE html>
<html>
<head></head>
<body>
<h1>GAPI with GIS async/await</h1>
<button id="showEventsBtn" onclick="showEvents();">Show Calendar</button><br><br>
<button id="revokeBtn" onclick="revokeToken();">Revoke access token</button>
<script>
const gapiLoadPromise = new Promise((resolve, reject) => {
gapiLoadOkay = resolve;
gapiLoadFail = reject;
});
const gisLoadPromise = new Promise((resolve, reject) => {
gisLoadOkay = resolve;
gisLoadFail = reject;
});
var tokenClient;
(async () => {
document.getElementById("showEventsBtn").style.visibility="hidden";
document.getElementById("revokeBtn").style.visibility="hidden";
// First, load and initialize the gapi.client
await gapiLoadPromise;
await new Promise((resolve, reject) => {
// NOTE: the 'auth2' module is no longer loaded.
gapi.load('client', {callback: resolve, onerror: reject});
});
await gapi.client.init({
// NOTE: OAuth2 'scope' and 'client_id' parameters have moved to initTokenClient().
})
.then(function() { // Load the Calendar API discovery document.
gapi.client.load('https://www.googleapis.com/discovery/v1/apis/calendar/v3/rest');
});
// Now load the GIS client
await gisLoadPromise;
await new Promise((resolve, reject) => {
try {
tokenClient = google.accounts.oauth2.initTokenClient({
client_id: 'YOUR_CLIENT_ID',
scope: 'https://www.googleapis.com/auth/calendar.readonly',
prompt: 'consent',
callback: '', // defined at request time in await/promise scope.
});
resolve();
} catch (err) {
reject(err);
}
});
document.getElementById("showEventsBtn").style.visibility="visible";
document.getElementById("revokeBtn").style.visibility="visible";
})();
async function getToken(err) {
if (err.result.error.code == 401 || (err.result.error.code == 403) &&
(err.result.error.status == "PERMISSION_DENIED")) {
// The access token is missing, invalid, or expired, prompt for user consent to obtain one.
await new Promise((resolve, reject) => {
try {
// Settle this promise in the response callback for requestAccessToken()
tokenClient.callback = (resp) => {
if (resp.error !== undefined) {
reject(resp);
}
// GIS has automatically updated gapi.client with the newly issued access token.
console.log('gapi.client access token: ' + JSON.stringify(gapi.client.getToken()));
resolve(resp);
};
tokenClient.requestAccessToken();
} catch (err) {
console.log(err)
}
});
} else {
// Errors unrelated to authorization: server errors, exceeding quota, bad requests, and so on.
throw new Error(err);
}
}
function showEvents() {
// Try to fetch a list of Calendar events. If a valid access token is needed,
// prompt to obtain one and then retry the original request.
gapi.client.calendar.events.list({ 'calendarId': 'primary' })
.then(calendarAPIResponse => console.log(JSON.stringify(calendarAPIResponse)))
.catch(err => getToken(err)) // for authorization errors obtain an access token
.then(retry => gapi.client.calendar.events.list({ 'calendarId': 'primary' }))
.then(calendarAPIResponse => console.log(JSON.stringify(calendarAPIResponse)))
.catch(err => console.log(err)); // cancelled by user, timeout, etc.
}
function revokeToken() {
let cred = gapi.client.getToken();
if (cred !== null) {
google.accounts.oauth2.revoke(cred.access_token, () => {console.log('Revoked: ' + cred.access_token)});
gapi.client.setToken('');
}
}
</script>
<script async defer src="https://apis.google.com/js/api.js" onload="gapiLoadOkay()" onerror="gapiLoadFail(event)"></script>
<script async defer src="https://accounts.google.com/gsi/client" onload="gisLoadOkay()" onerror="gisLoadFail(event)"></script>
</body>
</html>
