(Java) Google OAuth2 v3 userinfo (https://www.googleapis.com/oauth2/v3/userinfo)

Demonstrates how to get the Google OAuth2 v3 userinfo.

Important: Make sure the OAuth2 access token included "profile" in the list of scopes.

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris Java Libs for Android

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // It is assumed we previously obtained an OAuth2 access token.
    // This example loads the JSON access token file 
    // originally obtained by this example: Get Google People API OAuth2 Access Token
    // or refreshed by this example: Refresh Google People API OAuth2 Access Token

    CkJsonObject jsonToken = new CkJsonObject();
    boolean success = jsonToken.LoadFile("qa_data/tokens/googlePeople.json");
    if (success != true) {
        System.out.println("Failed to load googleContacts.json");
        return;
        }

    CkHttp http = new CkHttp();

    // -------------------------------------------------------------------------------------
    // Make sure the access token was obtained with "profile" included in the list of scopes.
    // -------------------------------------------------------------------------------------
    http.put_AuthToken(jsonToken.stringOf("access_token"));

    CkStringBuilder sbResponseBody = new CkStringBuilder();
    success = http.QuickGetSb("https://www.googleapis.com/oauth2/v3/userinfo",sbResponseBody);
    if (success == false) {
        System.out.println(http.lastErrorText());
        System.out.println(sbResponseBody.getAsString());
        return;
        }

    // Sample JSON Response

    CkJsonObject json = new CkJsonObject();
    json.put_EmitCompact(false);
    json.Load(sbResponseBody.getAsString());
    System.out.println(json.emit());

    // Sample response:

    // {
    //   "sub": "119999690625687999964",
    //   "name": "Matt",
    //   "given_name": "Matt",
    //   "picture": "https://lh3.googleusercontent.com/-b4...eg3Zjo/AAAAAAAAAAI/AAAAAAAAAAA/AMZuu....3RpdA/s96-c/photo.jpg",
    //   "locale": "en"
    // }
    // 
  }
}