(Node.js) Google Drive Refresh Access Token

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

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

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

    var 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 chilkat.JsonObject();
    var tokenFilePath = "qa_data/tokens/googleDrive.json";
    json.LoadFile(tokenFilePath);

    var oauth2 = new chilkat.OAuth2();
    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 chilkat.FileAccess();
    fac.WriteEntireTextFile(tokenFilePath,json.Emit(),"utf-8",false);

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

}

chilkatExample();