how to fetch linkedin data in codeigniter - php

Question

I am using codeigniter and want to fetch linkedin data but it not works.. it getting no error but i could not fetch data also
i am using this code defined in following url:
Linkedin php api not setting access token in codeigniter
and codes are
create library:
defined('BASEPATH') OR exit('No direct script access allowed');
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);
}
}
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');
and finally make my 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) {
$this->session->set_userdata("profile_session",$profileData);
} else {
// linked return an empty array of profile data
}
}
}
When i am running this controller then linkedin api works a modal window appears with my app name ..but after login
When i trying to print this session it does not apppears... dont know this code is working or not.. please help

Answer 1

This should work:
LinkedIn Class:
class Linkedin extends CI_Controller {
function __construct(){
parent:: __construct();
$this->load->library('session');
}
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
$this->session->set_userdata('state',$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
$ses_params = array('access_token' => $token->access_token,
'expires_in' => $token->expires_in,
'expires_at' => time() + $_SESSION['expires_in']);
$this->session->set_userdata($ses_params);
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);
}
}
Profile Controller:
class Profile extends CI_Controller {
function __construct() {
parent:: __construct();
$this->load->library('linkedin'); // load library
$this->load->library('session');
}
// linkedin login script
function profile() {
// OAuth 2 Control Flow
if (isset($_GET['error'])) {
// LinkedIn returned an error
// load any error view here
exit;
} elseif (isset($_GET['code'])) {
// User authorized your application
if ($this->session->userdata('state'); == $_GET['state']) {
// Get token so you can make API calls
$this->linkedin->getAccessToken();
} else {
// CSRF attack? Or did you mix up your states?
exit;
}
} else {
if ((empty($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'))) {
// 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) {
$this->session->set_userdata("profile_session",$profileData);
} else {
// linked return an empty array of profile data
}
}
}