(Node.js) Get Google Account Info from OAuth2 Access Token

See more Google APIs Examples

In the Google OAuth2 authorization flow, an application can know the email address of the Google account used to authorize access by requesting and processing user information from the Google UserInfo endpoint after obtaining an 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 assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var http = new chilkat.Http();
    var success;

    // Implements the following CURL command:

    // curl -H "Authorization: Bearer YOUR_ACCESS_TOKEN" https://www.googleapis.com/oauth2/v3/userinfo

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    // Adds the "Authorization: Bearer YOUR_ACCESS_TOKEN" header.
    http.AuthToken = "YOUR_ACCESS_TOKEN";

    var sbResponseBody = new chilkat.StringBuilder();
    success = http.QuickGetSb("https://www.googleapis.com/oauth2/v3/userinfo",sbResponseBody);
    if (success == false) {
        console.log(http.LastErrorText);
        return;
    }

    var jResp = new chilkat.JsonObject();
    jResp.LoadSb(sbResponseBody);
    jResp.EmitCompact = false;

    console.log("Response Body:");
    console.log(jResp.Emit());

    var respStatusCode = http.LastStatus;
    console.log("Response Status Code = " + respStatusCode);
    if (respStatusCode >= 400) {
        console.log("Response Header:");
        console.log(http.LastHeader);
        console.log("Failed.");
        return;
    }

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // {
    //   "sub": "112233445678901234567",
    //   "name": "John Doe",
    //   "given_name": "John",
    //   "family_name": "Doe",
    //   "profile": "https://plus.google.com/112233445678901234567",
    //   "picture": "https://lh3.googleusercontent.com/a-/AOh14GiU-EXAMPLE",
    //   "email": "johndoe@example.com",
    //   "email_verified": true,
    //   "locale": "en"
    // }

    // Sample code for parsing the JSON response...
    // Use the following online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    var v_sub = jResp.StringOf("sub");
    var name = jResp.StringOf("name");
    var given_name = jResp.StringOf("given_name");
    var family_name = jResp.StringOf("family_name");
    var profile = jResp.StringOf("profile");
    var picture = jResp.StringOf("picture");
    var email = jResp.StringOf("email");
    var email_verified = jResp.BoolOf("email_verified");
    var locale = jResp.StringOf("locale");

}

chilkatExample();