This is my first time working with the linkedIn api and I am trying to follow this example in the official documentation:
[http://developer.linkedin.com/documents/code-samples][1]
I have refactored that same procedural code into a codeigniter controller class called Auth
:
<?php if (!defined('BASEPATH')) die();
class Auth extends CI_Controller
{
public function __construct ()
{
parent::__construct();
define('API_KEY', $this->config->item('key'));
define('API_SECRET', $this->config->item('secret'));
define('REDIRECT_URI', 'http://' . $_SERVER['SERVER_NAME'] . ':8000/auth');
define('SCOPE', 'r_basicprofile r_emailaddress rw_groups');
}
public function index()
{
var_dump($this->session->all_userdata());
if (!empty($this->session->userdata('state'))) {
$user = $this->fetch('GET', '/v1/people/~:(firstName,lastName)');
print "Hello $user->firstName $user->lastName.";
} else {
// $this->session->sess_destroy();
echo anchor('auth/oauth', 'Sign in with Linkedin');
}
}
public function oauth()
{
// OAuth 2 Control Flow
if (isset($_GET['error'])) {
// LinkedIn returned an error
print $_GET['error'] . ': ' . $_GET['error_description'];
exit;
} elseif (isset($_GET['code'])) {
// User authorized your application
if ($this->session->userdata('state') == $_GET['state']) {
// Get token so you can make API calls
$this->getAccessToken();
} else {
// CSRF attack? Or did you mix up your states?
exit;
}
} else {
if ((empty($this->session->userdata('expires_at'))) || (time() > $this->session->userdata('expires_at'))) {
// Token has expired, clear the state
$this->session->sess_destroy();
}
if (empty($this->session->userdata('access_token'))) {
echo "here I am";
// Start authorization process
$this->getAuthorizationCode();
}
}
}
protected function getAccessToken() {
$params = array('grant_type' => 'authorization_code',
'client_id' => API_KEY,
'client_secret' => API_SECRET,
'code' => $_GET['code'],
'redirect_uri' => REDIRECT_URI,
);
// Access Token request
$url = 'https://www.linkedin.com/uas/oauth2/accessToken?' . http_build_query($params);
// Tell streams to make a POST request
$context = stream_context_create(
array('http' =>
array('method' => 'POST',
)
)
);
// Retrieve access token information
$response = file_get_contents($url, false, $context);
// Native PHP object, please
$token = json_decode($response);
// Store access token and expiration time
// $_SESSION['access_token'] = $token->access_token; // guard this!
// $_SESSION['expires_in'] = $token->expires_in; // relative time (in seconds)
// $_SESSION['expires_at'] = time() + $_SESSION['expires_in']; // absolute time
$this->session->set_userdata('access_token', $token->access_token);
$this->session->set_userdata('expires_in', $token->expires_in);
$this->session->set_userdata('expires_at', time() + $this->session->userdata('expires_in'));
return true;
}
protected function getAuthorizationCode() {
$params = array('response_type' => 'code',
'client_id' => API_KEY,
'scope' => SCOPE,
'state' => uniqid('', true), // unique long string
'redirect_uri' => REDIRECT_URI,
);
// Authentication request
$url = 'https://www.linkedin.com/uas/oauth2/authorization?' . http_build_query($params);
// Needed to identify request when it returns to us
// $_SESSION['state'] = $params['state'];
$this->session->set_userdata('state', $params['state']);
// Redirect user to authenticate
redirect($url);
}
protected function fetch($method, $resource, $body = '') {
$params = array('oauth2_access_token' => $this->session->userdata('access_token'),
'format' => 'json',
);
// Need to use HTTPS
$url = 'https://api.linkedin.com' . $resource . '?' . http_build_query($params);
// Tell streams to make a (GET, POST, PUT, or DELETE) request
$context = stream_context_create(
array('http' =>
array('method' => $method,
)
)
);
// Hocus Pocus
$response = file_get_contents($url, false, $context);
// Native PHP object, please
return json_decode($response);
}
public function logout()
{
$_SESSION = array();
$this->load->view('comment_index');
}
}
I am using the database to store sessions and I was expecting access_token
to be one of the values stored in my serialized field called user_data
. But I get nothing. The output of the current session is:
array (size=5)
'session_id' => string '1dfcbc17bf0346424726c7cace63501b' (length=32)
'ip_address' => string '`127.0.0.1`' (length=9)
'user_agent' => string 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:25.0) Gecko/20100101 Firefox/25.0' (length=81)
'last_activity' => int 1386687134
'user_data' => string '' (length=0)
I don't understand why linkedin is not giving me back tokens for storage. Because of the redirect_url, I am not able to debug this code properly either. So far what is working is:
User is redirected to authorization window with this ur: https://www.linkedin.com/uas/oauth2/authorization?response_type=code&client_id=75y11f289134ga&scope=r_basicprofile+r_emailaddress+rw_groups&state=52a72cc4e54f36.03304050&redirect_uri= http%3A%2F%2F127.0.0.1%3A8000%2Fauth
User is being redirected to the auth
action without any error with this url: http://127.0.0.1:8000/auth?
code=AQTWPFJqnZlBZmFByb3Vbjkf4jtNvn8C7atg5iM6iXFW3ON_SrM3uJ9h8AiF1RbMjgGt_NpDq4cTPL1qw8uNiA_vsOv1H3lpxu0IxHVx_sa9rDAinbo&state=52a72d109261d4.41607693
But where is my profile data? How and where do I make an api call to retrieve profile data? Please help
I do the same in the Codeigniter.
Here is procedure to get Auth User Profile.
Create a library for Linkedin
defined('BASEPATH') OR exit('No direct script access allowed'); /** * CodeIgniter Linked API Class * * * @package CodeIgniter * @subpackage Libraries * @category Libraries * @author Muhamamd Hafeez */ class Linkedin { function __construct(){ } public function getAuthorizationCode() { $params = array('response_type' => 'code', 'client_id' => API_KEY, 'scope' => SCOPE, 'state' => uniqid('', true), // unique long string 'redirect_uri' => REDIRECT_URI, ); // Authentication request $url = 'https://www.linkedin.com/uas/oauth2/authorization?' . http_build_query($params); // Needed to identify request when it returns to us $_SESSION['state'] = $params['state']; // Redirect user to authenticate header("Location: $url"); exit; } public function getAccessToken() { $params = array('grant_type' => 'authorization_code', 'client_id' => API_KEY, 'client_secret' => API_SECRET, 'code' => $_GET['code'], 'redirect_uri' => REDIRECT_URI, ); // Access Token request $url = 'https://www.linkedin.com/uas/oauth2/accessToken?' . http_build_query($params); // Tell streams to make a POST request $context = stream_context_create( array('http' => array('method' => 'POST', ) ) ); // Retrieve access token information $response = file_get_contents($url, false, $context); // Native PHP object, please $token = json_decode($response); // Store access token and expiration time $_SESSION['access_token'] = $token->access_token; // guard this! $_SESSION['expires_in'] = $token->expires_in; // relative time (in seconds) $_SESSION['expires_at'] = time() + $_SESSION['expires_in']; // absolute time return true; } public function fetch($method, $resource, $body = '') { $params = array('oauth2_access_token' => $_SESSION['access_token'], 'format' => 'json', ); // Need to use HTTPS $url = 'https://api.linkedin.com' . $resource . '?' . http_build_query($params); // Tell streams to make a (GET, POST, PUT, or DELETE) request $context = stream_context_create( array('http' => array('method' => $method, ) ) ); // Hocus Pocus $response = file_get_contents($url, false, $context); // Native PHP object, please return json_decode($response); } } /* End of file Linked.php */ /* Location: ./application/libraries/linkedin.php */
Put all your Constants stuff in confin/constants.php
define('API_KEY', 'Put Yoour API_KEY here'); define('API_SECRET', 'Put Yoour API_SECRET here'); define('REDIRECT_URI', 'Put Yoour REDIRECT_URI here'); define('SCOPE', 'r_fullprofile r_emailaddress rw_nus r_contactinfo r_network');
Now the Controller
class Profile extends CI_Controller { function __construct() { parent:: __construct(); $this->load->library('linkedin'); // load library session_name('linkedin'); session_start(); } // linkedin login script function profile() { // OAuth 2 Control Flow if (isset($_GET['error'])) { // LinkedIn returned an error // load any error view here exit; } elseif (isset($_GET['code'])) { // User authorized your application if ($_SESSION['state'] == $_GET['state']) { // Get token so you can make API calls $this->linkedin->getAccessToken(); } else { // CSRF attack? Or did you mix up your states? exit; } } else { if ((empty($_SESSION['expires_at'])) || (time() > $_SESSION['expires_at'])) { // Token has expired, clear the state $_SESSION = array(); } if (empty($_SESSION['access_token'])) { // Start authorization process $this->linkedin->getAuthorizationCode(); } } // define the array of profile fields $profile_fileds = array( 'id', 'firstName', 'maiden-name', 'lastName', 'picture-url', 'email-address', 'location:(country:(code))', 'industry', 'summary', 'specialties', 'interests', 'public-profile-url', 'last-modified-timestamp', 'num-recommenders', 'date-of-birth', ); $profileData = $this->linkedin->fetch('GET', '/v1/people/~:(' . implode(',', $profile_fileds) . ')'); if ($profileData) { // save profile or do whatever you want } else { // linked return an empty array of profile data } } }
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