tamw-wnet

function wnet_get_transient_remote_json($transientname, $url, $interval=1800) {
  // those are the same arguments as 'set_transient()'

  $stalecachename = 'stalecache_' . $transientname; 
  // we generate a consistent name for the backup data

     if ( false === ( $json = get_transient($transientname) ) ) {
       $response = wp_remote_get($url);
       // get the remote data as before, but this time...

tamw-wnet

I blog at ieg.wnet.org/author/tamw 

Thorough guide to OAuth in WordPress, with code examples: 
http://ieg.wnet.org/2015/08/using-oauth-in-wordpress-plugin-part-1-the-basics/

Walkthrough of how we do OAuth on thirteen.org: 
http://ieg.wnet.org/2016/04/pbs-logins-thirteen-org-thirteen-passport/

My complete presentation on slideshare
http://www.slideshare.net/WilliamTam13/integrating-oauth-and-social-login-into-wordpress-64172056

tamw-wnet

<?php
/*
 * Plugin Name: Foo oAuth Demo 
 * Version: 2 
 * Plugin URI: http://ieg.wnet.org/
 * Description: A simple Google oAuth demo plugin
 * Author: William Tam
 * Author URI: http://ieg.wnet.org/blog/author/tamw/
 * Requires at least: 3.6
 * Tested up to: 4.2.2 

tamw-wnet

<?php
/*
 * Plugin Name: Foo oAuth Demo 
 * Version: 1 
 * Plugin URI: http://ieg.wnet.org/
 * Description: A simple Google oAuth demo plugin
 * Author: William Tam
 * Author URI: http://ieg.wnet.org/blog/author/tamw/
 * Requires at least: 3.6
 * Tested up to: 4.2.2