(Node.js) Calendar: Refresh Expired OAuth2 Access Token

Refreshes an expired OAuth2 access token.

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 json = new chilkat.JsonObject();
    var success = json.LoadFile("qa_data/tokens/msGraphCalendar.json");
    if (success !== true) {
        return;
    }

    var req = new chilkat.HttpRequest();
    req.AddParam("grant_type","refresh_token");
    req.AddParam("redirect_uri","http://localhost:3017/");
    req.AddParam("client_id","MICROSOFT-GRAPH-CLIENT-ID");
    req.AddParam("client_secret","MICROSOFT-GRAPH-CLIENT-SECRET");
    req.AddParam("refresh_token",json.StringOf("refresh_token"));
    req.AddParam("scope","openid profile offline_access user.readwrite calendars.readwrite files.readwrite");

    var http = new chilkat.Http();

    // resp: HttpResponse
    var resp = http.PostUrlEncoded("https://login.microsoftonline.com/common/oauth2/v2.0/token",req);
    if (http.LastMethodSuccess !== true) {
        console.log(http.LastErrorText);
        return;
    }

    // Load the JSON response.
    json.Load(resp.BodyStr);
    json.EmitCompact = false;

    // Show the JSON response.
    console.log(json.Emit());

    console.log("Response status code: " + resp.StatusCode);

    // If the response status code is not 200, then it's an error.
    if (resp.StatusCode !== 200) {
        return;
    }

    // Save the refreshed access token JSON to a file for future requests.
    var fac = new chilkat.FileAccess();
    fac.WriteEntireTextFile("qa_data/tokens/msGraphCalendar.json",json.Emit(),"utf-8",false);

    console.log("Success.");

}

chilkatExample();