<!DOCTYPE html>
<html>
<head>
<title>OAuth2.0</title>
<meta charset='utf-8' />
</head>
<body>
<p>OAuth2.</p>
<!--Add buttons to initiate auth sequence and sign out-->
<button id="authorize-button" style="display: none;">Authorize</button>
<button id="signout-button" style="display: none;">Sign Out</button>
<div id="content"></div>
<script type="text/javascript">
let clientId = 'client id';
let scopes = 'https://mail.google.com/';
let authorizeButton = document.getElementById('authorize-button');
let signoutButton = document.getElementById('signout-button');
function handleClientLoad() {
// Load the API client and auth2 library
gapi.load('client:auth2', initClient);
}
function initClient() {
gapi.client.init({
clientId: clientId,
scope: scopes
}).then(function () {
// Listen for sign-in state changes.
gapi.auth2.getAuthInstance().isSignedIn.listen(updateSigninStatus);
// Handle the initial sign-in state.
updateSigninStatus(gapi.auth2.getAuthInstance().isSignedIn.get());
authorizeButton.onclick = handleAuthClick;
signoutButton.onclick = handleSignoutClick;
});
}
function updateSigninStatus(isSignedIn) {
// Access permission
if (isSignedIn) {
authorizeButton.style.display = 'none';
signoutButton.style.display = 'block';
makeApiCall();
} else {
authorizeButton.style.display = 'block';
signoutButton.style.display = 'none';
}
}
function handleAuthClick(event) {
gapi.auth2.getAuthInstance().signIn();
}
function handleSignoutClick(event) {
gapi.auth2.getAuthInstance().signOut();
}
function makeApiCall() {
// Acess token is ready !!!
console.log(gapi.client.getToken());
console.log('Yessssssssssssss');
}
</script>
<script async defer src="https://apis.google.com/js/api.js"
onload="this.onload=function(){};handleClientLoad()"
onreadystatechange="if (this.readyState === 'complete') this.onload()">
</script>
</body>
</html>