(JavaScript) Google Drive Refresh Access Token

Demonstrates how to automatically refresh the access token when it expires.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

success = true;

// This example uses a previously obtained access token having permission for the 
// Google Drive scope.

// The access token (and refresh token) was previously saved to a JSON file with this format:
// See Get Google Drive OAuth2 Access Token

// {
//   "access_token": "ya29.Gls-BsdxTWuenChv ... yzVIrXikkLxu5T6dy4I6GjADFardoz4Lruw",
//   "expires_in": 3600,
//   "refresh_token": "1/tMBJ ... 27D-Hk6rpQYBA",
//   "scope": "https://www.googleapis.com/auth/drive",
//   "token_type": "Bearer"
// }

var json = new CkJsonObject();
var tokenFilePath = "qa_data/tokens/googleDrive.json";
json.LoadFile(tokenFilePath);

var oauth2 = new CkOAuth2();
oauth2.AccessToken = json.StringOf("access_token");
oauth2.RefreshToken = json.StringOf("refresh_token");

oauth2.AuthorizationEndpoint = "https://accounts.google.com/o/oauth2/v2/auth";
oauth2.TokenEndpoint = "https://www.googleapis.com/oauth2/v4/token";

//  Replace these with actual values.
oauth2.ClientId = "GOOGLE-CLIENT-ID";
oauth2.ClientSecret = "GOOGLE-CLIENT-SECRET";
oauth2.Scope = "https://www.googleapis.com/auth/drive";

// Use OAuth2 to refresh the access token.
success = oauth2.RefreshAccessToken();
if (success !== true) {
    console.log(oauth2.LastErrorText);
    return;
}

console.log(oauth2.AccessTokenResponse);

// Save the new access token to our JSON file (so we can refresh it again when needed).
json.UpdateString("access_token",oauth2.AccessToken);

var fac = new CkFileAccess();
fac.WriteEntireTextFile(tokenFilePath,json.Emit(),"utf-8",false);

console.log("Access Token Refreshed!");