Node.js

Get Google API Access Token using P12 Service Account Key

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Demonstrates how to get a Google API access token using a P12 service account key. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    //  --------------------------------------------------------------------------------
    //  For a step-by-step guide for setting up your Google Workspace service account,
    //  see Setup Google Workspace Account for Sending SMTP GMail from a Service Account
    //  --------------------------------------------------------------------------------

    //  First load the PKCS12 (.p12 / .pfx) into a PFX object.
    var pfx = new chilkat.Pfx();
    success = pfx.LoadPfxFile("qa_data/pfx/chilkat25-cbd7b42afbd8.p12","notasecret");
    if (success !== true) {
        console.log(pfx.LastErrorText);
        return;
    }

    var gAuth = new chilkat.AuthGoogle();
    success = gAuth.SetP12(pfx);

    //  The ISS is your service account email address ending in gserviceaccount.com.
    var iss = "chilkatsvc@chilkat25.iam.gserviceaccount.com";

    //  The scope is always the following string:
    var scope = "https://mail.google.com/";

    //  The sub is your company email address
    var oauth_sub = "info@chilkat.xyz";

    //  The access token is valid for this number of seconds.
    var numSec = 3600;

    gAuth.EmailAddress = iss;
    gAuth.Scope = scope;
    gAuth.ExpireNumSeconds = numSec;
    gAuth.SubEmailAddress = oauth_sub;

    //  Connect to www.googleapis.com
    var tlsSock = new chilkat.Socket();
    success = tlsSock.Connect("www.googleapis.com",443,true,5000);
    if (success !== true) {
        console.log(tlsSock.LastErrorText);
        return;
    }

    //  Send the request to obtain the access token.
    success = gAuth.ObtainAccessToken(tlsSock);
    if (success !== true) {
        console.log(gAuth.LastErrorText);
        return;
    }

    //  Examine the access token:
    console.log("Access Token: " + gAuth.AccessToken);

}

chilkatExample();