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Update Twitter sample #457

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Merged
merged 1 commit into from
Dec 14, 2023
Merged

Update Twitter sample #457

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36 changes: 3 additions & 33 deletions samples/Twitter.gs
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Original file line number Diff line number Diff line change
Expand Up @@ -31,21 +31,17 @@ function run() {
*/
function reset() {
getService_().reset();
PropertiesService.getUserProperties().deleteProperty('code_challenge');
PropertiesService.getUserProperties().deleteProperty('code_verifier');
}

/**
* Configures the service.
*/
function getService_() {
pkceChallengeVerifier();
var userProps = PropertiesService.getUserProperties();
return OAuth2.createService('Twitter')
// Set the endpoint URLs.
.setAuthorizationBaseUrl('https://twitter.com/i/oauth2/authorize')
.setTokenUrl(
'https://api.twitter.com/2/oauth2/token?code_verifier=' + userProps.getProperty('code_verifier'))
.setTokenUrl('https://api.twitter.com/2/oauth2/token')

// Set the client ID and secret.
.setClientId(CLIENT_ID)
Expand All @@ -61,10 +57,8 @@ function getService_() {
// Set the scopes to request (space-separated for Twitter services).
.setScope('users.read tweet.read offline.access')

// Add parameters in the authorization url
.setParam('response_type', 'code')
.setParam('code_challenge_method', 'S256')
.setParam('code_challenge', userProps.getProperty('code_challenge'))
// Generate code verifier parameter
.generateCodeVerifier()

.setTokenHeaders({
'Authorization': 'Basic ' + Utilities.base64Encode(CLIENT_ID + ':' + CLIENT_SECRET),
Expand All @@ -91,27 +85,3 @@ function authCallback(request) {
function logRedirectUri() {
Logger.log(OAuth2.getRedirectUri());
}

/**
* Generates code_verifier & code_challenge for PKCE
*/
function pkceChallengeVerifier() {
var userProps = PropertiesService.getUserProperties();
if (!userProps.getProperty('code_verifier')) {
var verifier = '';
var possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~';

for (var i = 0; i < 128; i++) {
verifier += possible.charAt(Math.floor(Math.random() * possible.length));
}

var sha256Hash = Utilities.computeDigest(Utilities.DigestAlgorithm.SHA_256, verifier);

var challenge = Utilities.base64Encode(sha256Hash)
.replace(/\+/g, '-')
.replace(/\//g, '_')
.replace(/=+$/, '');
userProps.setProperty('code_verifier', verifier);
userProps.setProperty('code_challenge', challenge);
}
}