Facebook Connect and Codeigniter - HTTP/1.0 400 Bad Request - facebook

Question

i'm struggling really hard to implement Facebook connect into my codeigniter application - I have one issue right now. After downloading the PHP SDK from here: https://github.com/facebook/php-sdk/ I copied the /src files into my CI libraries (as everyone do : )).
Now I want to authenticate my users using this method:
https://developers.facebook.com/docs/authentication/server-side/
My controller is here (I think the problem is at the end, but pasted full file, cause i'm not sure):
<?php
class Fb25 extends CI_Controller {
function index()
{
$app_id = "MY APP ID";
$app_secret = "MY SECRET KEY";
$site_url = "http://devlocalhost.com/";
$this->load->library('facebook',array('appId' => $app_id, 'secret' => $app_secret));
$user = $this->facebook->getUser();
$data['user'] = $user;
if($user){
$data['user_profile'] = $this->facebook->api('/me');
$user_profile = $data['user_profile'];
} else{
$user = NULL;
}
if($user){
// Get logout URL
$data['logoutUrl'] = $this->facebook->getLogoutUrl(array(
'next' => 'http://devlocalhost.com/', // URL to which to redirect the user after logging out
));
}else{
// Get login URL
$data['loginUrl'] = $this->facebook->getLoginUrl(array(
'scope' => 'email', // Permissions to request from the user
'redirect_uri' => 'http://devlocalhost.com/fb25/good', // URL to redirect the user to once the login/authorization process is complete.
));
}
if($user){
// Save your method calls into an array
$data['queries'] = array(
array('method' => 'GET', 'relative_url' => '/'.$user),
array('method' => 'GET', 'relative_url' => '/'.$user.'/home?limit=50'),
array('method' => 'GET', 'relative_url' => '/'.$user.'/friends'),
array('method' => 'GET', 'relative_url' => '/'.$user.'/photos?limit=6'),
);
// POST your queries to the batch endpoint on the graph.
$batchResponse = $facebook->api('?batch='.json_encode($queries), 'POST');
//Return values are indexed in order of the original array, content is in ['body'] as a JSON
//string. Decode for use as a PHP array.
$data['user_info'] = json_decode($batchResponse[0]['body'], TRUE);
$data['feed'] = json_decode($batchResponse[1]['body'], TRUE);
$data['friends_list'] = json_decode($batchResponse[2]['body'], TRUE);
$data['photos'] = json_decode($batchResponse[3]['body'], TRUE);
}
echo 'user_info: '.$data['user_info'];
print_r($data);
$this->load->view('fb25_view', $data);
}
public function good(){
$app_id = "MY APP ID";
$app_secret = "MY SECRET KEY";
$site_url = "http://devlocalhost.com/";
echo '<br/><br/>SESJA:<br/>';
print_r($_SESSION);
echo '<br/><br/>GET:<br/>';
print_r($_GET);
echo '<br/><br/>REQUEST:<br/>';
print_r($_REQUEST);
echo '<br/><br/>najs<br/><br/>';
session_start();
$code = $_GET["code"];
//######IMO PROBLEM IS SOMEWHERE HERE:
$token_url = "https://graph.facebook.com/oauth/access_token?"
. "client_id=" . $app_id . "&redirect_uri=" . urlencode($my_url)
. "&client_secret=" . $app_secret . "&code=" . $code;
$response = file_get_contents($token_url);
$params = null;
parse_str($response, $params);
$graph_url = "https://graph.facebook.com/me?access_token="
. $params['access_token'];
$user = json_decode(file_get_contents($graph_url));
echo("Hello " . $user->name);
}
}
?>
My problem is: I'm pressing the login button and gets into facebook to authenticate myself, clicking "go to app" and want to go back into my website - it says:
Message: file_get_contents(https://graph.facebook.com/oauth/access_token? client_id=487560264592073&redirect_uri=http%3A%2F%2Fdevlocalhost.com%2F&client_secret=mysecretcode&code=AQAgnmNWwDub9yaRB6Vf73gg8Xvwo8KhIM077lB67_bu1Z3rAvyk3Ckl54qK7hh9o3VkG0rFIBTfRXwtrSBFVWEpqYfm1o7e5CQg3jVctq-EE1ZxWrgWrfesLpQ2oF3wlmEMb5o6ORobGmibT06kqe5f2N0ch4kSYBJ4SiTcdV-612fGOJHGcipeyU_GJJ0Jvsg)
[function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request
UPDATE
Look here, please:
I added function into your controller:
public function link(){
$fb_usr = $this->fb_connect->user;
$firstname = $fb_usr['first_name'];
$my_url="http://devlocal.pl";
echo 'user_id';
$token_url = "https://graph.facebook.com/oauth/access_token?"
. "client_id=myclientid&redirect_uri=" . urlencode($my_url)
. "&client_secret=mysecretcode&code=" . $_GET['code'];
redirect($token_url);
}
To get my access token - without access token I can't get my username..
I made your loginbyfacebook function redirecting into link function. And it doesn't show the fb username.
When I'm redirecting to my token_url It shows:
{
"error": {
"message": "Error validating verification code.",
"type": "OAuthException",
"code": 100
}
}

Answer 1

Follow these steps:
1.Put the facebook php sdk in library folder
2.create facebook config with app detail
3.Inherit facebook class in fb_connect
4.add these function in controller then it will work like charm.
fb_connect.php
<?php
include(APPPATH.'libraries/facebook/facebook.php');
class Fb_connect extends Facebook{
//declare public variables
public $user = NULL;
public $user_id = FALSE;
public $fb = FALSE;
public $fbSession = FALSE;
public $appkey = 0;
//constructor method.
public function __construct()
{
$CI = & get_instance();
$CI->config->load("facebook",TRUE);
$config = $CI->config->item('facebook');
parent::__construct($config);
$this->user_id = $this->getUser(); // New code
$me = null;
if ($this->user_id) {
try {
$me = $this->api('/me');
$this->user = $me;
} catch (FacebookApiException $e) {
error_log($e);
}
}
}
} // end class
Controller function
function loginByFacebook(){
$this->load->library('fb_connect');
$param = array(
'scope' =>'email,user_location,user_birthday,offline_access',
'redirect_uri' => base_url()
);
redirect($this->fb_connect->getLoginUrl($param));
}
function facebook() {
if (!$this->fb_connect->user_id) {
} else {
$fb_uid = $this->fb_connect->user_id;
$fb_usr = $this->fb_connect->user;
$firstname = $fb_usr['first_name'];
}
}
In this way
$fb_usr = $this->fb_connect->user;
$firstname = $fb_usr['first_name'];