PHP/Drupal example of making an authenticated user search request to the Passport API

gistfile1.php

<?php
/*
PHP/Drupal example of making an authenticated user search request to the Passport API
*/

function example_passport_api_request() {
  $server = 'http://example.com/rest/';
  
  //login request - we need to authenticate before requesting protected data
  $username = 'username';
  $password = 'password';
  $url = $server . 'user/login.json';
  $options = array(
    'method' => 'POST',
    'headers' => array('Content-Type' => 'application/json'),
    'data' => json_encode(array(
      'username' => $username,
      'password' => $password,
    )),
  );  
  $result = drupal_http_request($url, $options['headers'], $options['method'], $options['data']);  //d6 //$result = drupal_http_request($url, $options); //d7
  if ($result->code != 200) {
    drupal_set_message(t('Authentication error: ') . $result->status_message, 'error');
  }
  $login_data = json_decode($result->data);
  $cookie = $login_data->session_name . "=" . $login_data->sessid . ";"; //build the session cookie from our login repsonse so we can pass it on subsequent requests
  
  //user search request
  $url = $server . 'search/user_index/ui.json?keys=joe&sort=field_anniversary:DESC'; //$url = $server . 'search/user_index/ui.json';
  $options = array(
    'method' => 'GET',
    'headers' => array(
      'Content-Type' => 'application/json',
      'Cookie' => $cookie, //add our auth cookie to the header
    ),
  );
  $result = drupal_http_request($url, $options['headers'], $options['method'], $options['data']);  //d6 //$result = drupal_http_request($url, $options); //d7
  dpm(json_decode($result->data), 'result data');
  
  //Log out request, since we are done now.
  $url = $server . 'user/logout.json';
  $options = array(
    'method' => 'POST',
    'headers' => array('Cookie' => $cookie),
  );
  $result = drupal_http_request($url, $options['headers'], $options['method'], $options['data']);  //d6 //$result = drupal_http_request($url, $options); //d7
}