While developing facebook apps I want to fetch the liked status of a page to redirect them accordingly.Earlier I used the following code:
<?php
require 'facebook.php';
$app_id = "**************";
$app_secret = "*************************************";
$facebook = new Facebook(array(
'appId' => $app_id,
'secret' => $app_secret,
'cookie' => true
));
$signed_request = $facebook->getSignedRequest();
$like_status = $signed_request["page"]["liked"];
if($like_status==1)
echo "liked";
else
echo "not liked";
?>
But due to the new policy by facebook, in the apps developed after 7th aug 2014 I cannot get the page liked status using this method.
Pages.isFan() is also not working and FQL I read will not last long. Is there any other method to do it?
https://developers.facebook.com/docs/apps/changelog
Fangates are dead, they don´t work for new Apps anymore, and there is no other way to do it. They also forbid them in the Platform Policy (see Changelog):
You must not incentivize people to use social plugins or to like a
Page.
That is why the like value in signed_request was removed.
Related
What I am actually trying to do is to retrieve my posts/statuses from my personal facebook profile page (this is not a fan page) and display them in my website. Also please note that every user that will visit my website should be able to view my statuses by means it does not have to do with authenticating them or something like that. This is something that needs to be generated server-side.
I am aware that you can retrieve a JSON string from a URL like this https://graph.facebook.com/MY_PROFILE_ID/feed?access_token=ACCESS_TOKEN because I tried it from the facebook developers (Graph API Explorer) page and it is exactly what I need.
The thing is that when I generate the access token from the Graph API Explorer I can select permissions and it generates the token respectively according to permissions chosen, such as user_status, status_update, etc.
Now I want to accomplish this by using PHP-SDK but I have no idea how to generate an access token the same as the one I generate in the Graph API Explorer.
The basic way to do this is by calling getAccessToken() as shown here. The thing is that when I use the token generated from this simple method the JSON string returned will only show me my basic information.
$config = array(
'appId' => 'MY_APP_ID',
'secret' => 'MY_APP_SECRET',
);
$facebook = new Facebook($config);
$ACCESS_TOKEN = $facebook->getAccessToken();
How can I add permissions for instance? Should I assign parameters somewhere? I spent quite a lot of time reading the facebook API documentation and some other forums but I did not find the answer that I need.
Finally if I get the right access token than I would simply retrieve the JSON string and parse it with what I need.
Thanks.
you need for add permissions in your code for login using the fb js sdk add in the scope this like this example:
$("#login").on('click',function(){
FB.login(function(response){
console.log(response);
},{scope: 'email,manage_pages,read_insights'});
});
or in php fb sdk the next form:
<?php
require 'server/fb-php-sdk/facebook.php';
$app_id = 'APP_ID';
$app_secret = 'APP_SECRET';
$app_namespace = 'APP_NAMESPACE';
$app_url = 'https://apps.facebook.com/' . $app_namespace . '/';
$scope = 'email,publish_actions';
// Init the Facebook SDK
$facebook = new Facebook(array(
'appId' => $app_id,
'secret' => $app_secret,
));
// Get the current user
$user = $facebook->getUser();
// If the user has not installed the app, redirect them to the Login Dialog
if (!$user) {
$loginUrl = $facebook->getLoginUrl(array(
'scope' => $scope,
'redirect_uri' => $app_url,
));
print('<script> top.location.href=\'' . $loginUrl . '\'</script>');
}
?>
the most important for add permission is this part :
$scope = 'email,publish_actions';
you can find all about the extended permissions in this link
https://developers.facebook.com/docs/reference/login/extended-permissions
There seems to be very few to no up to date resources on integration of Facebook login with the cakephp Auth component online. I have found the following resources:
Old Bakery Article using cakephp 1.3? and an older version of Facebook SDK
Cakephp Plugin by webtechnick that seems to be in development
Other than this I found no definitive resources. I wanted the integration to be as flexible (without the use of a magic plugin) as possible. So after much research I finally baked a decent solution which I am sharing here today. Please contribute as I am rather new to cake.
Integration of Cakephp 2.x Auth with Facebook Auth for seamless user authentication
To start off you should read up on the fantastic cakePHP Auth Component and follow the Simple Authentication and Authorization Application tutorial from the cakephp book 2.x (Assuming you have also followed the first two tutorials from the series. After you are done, you should have managed to build a simple cakePHP application with user authentication and authorization.
Next you should download the facebook SDK and obtain an App ID from facebook.
First we will copy the Facebook sdk in to App/Vendors. Then we will import and initialize it in the AppController beforeFilter method.
//app/Controller/AppController.php
public function beforeFilter() {
App::import('Vendor', 'facebook-php-sdk-master/src/facebook');
$this->Facebook = new Facebook(array(
'appId' => 'App_ID_of_facebook',
'secret' => 'App_Secret'
));
$this->Auth->allow('index', 'view');
}
We are initializing the Facebook SDK in AppController so that we will have access to it through out the application. Next we will generate the Facebook login URL using the SDK and pass it to the view. I normally do this in the beforeRender method.
Note: The above configuration details (appId & secret) should preferably be saved in App/Config/facebook.php. You should then use cake Configure.
//app/Controller/AppController.php
public function beforeRender() {
$this->set('fb_login_url', $this->Facebook->getLoginUrl(array('redirect_uri' => Router::url(array('controller' => 'users', 'action' => 'login'), true))));
$this->set('user', $this->Auth->user());
}
We will update our layout so that we can display this link to facebook login for all users who have not logged in. Notice how we have set redirect_uri to our applications User/login action. This is so that once facebook has authenticated a user, we can log him in using cake::Auth as well. There are various benefits to this, including the solution for this question.
<!-- App/Views/Layouts/default.ctp just after <div id="content"> -->
<?php
if($user) echo 'Welcome ' . $user['username'];
else {
echo $this->Html->link('Facebook Login', $fb_login_url) . ' | ';
echo $this->Html->link('Logout', array('controller' => 'user', 'action' => 'logout'));
?>
When the user clicks the login link, facebook SDK will login the user and redirect them to our app Users/login. We will update this action for handling this:
// App/Controller/UsersController.php
// Handles login attempts from both facebook SDK and local
public function login()
{
// If it is a post request we can assume this is a local login request
if ($this->request->isPost()){
if ($this->Auth->login()){
$this->redirect($this->Auth->redirectUrl());
} else {
$this->Session->setFlash(__('Invalid Username or password. Try again.'));
}
}
// When facebook login is used, facebook always returns $_GET['code'].
elseif($this->request->query('code')){
// User login successful
$fb_user = $this->Facebook->getUser(); # Returns facebook user_id
if ($fb_user){
$fb_user = $this->Facebook->api('/me'); # Returns user information
// We will varify if a local user exists first
$local_user = $this->User->find('first', array(
'conditions' => array('username' => $fb_user['email'])
));
// If exists, we will log them in
if ($local_user){
$this->Auth->login($local_user['User']); # Manual Login
$this->redirect($this->Auth->redirectUrl());
}
// Otherwise we ll add a new user (Registration)
else {
$data['User'] = array(
'username' => $fb_user['email'], # Normally Unique
'password' => AuthComponent::password(uniqid(md5(mt_rand()))), # Set random password
'role' => 'author'
);
// You should change this part to include data validation
$this->User->save($data, array('validate' => false));
// After registration we will redirect them back here so they will be logged in
$this->redirect(Router::url('/users/login?code=true', true));
}
}
else{
// User login failed..
}
}
}
And we are done! Most of the heavy lifting is done by this action as you can see. You should preferably move some of the above code in to UserModel. So here's a summary of what is going on.
At first we check if the login request is send from the login form of our application # Users/login. If it is, then we simply log the user in. Otherwise we check if the user exists in our database and if he does log him in or create a new user, and then log him in.
Be careful to verify the user here with more than their email, like their facebook_id. Otherwise there is a chance the user could change their facebook email and hijack another user of your application.
Happy Coding!
I have built an app using the PHP Facebook SDK. It allows users to authenticate my app with facebook OAth so that they can update their status' via my App. This works great, however a lot of my users have business pages and they want to update the status on their business page not their main personal feed. How is this possible? Below is what I have so far.
if ($status != ''){
try {
$parameters = array(
'message' => "$status"/*,
'picture' => $_POST['picture'],
'link' => $_POST['link'],
'name' => $_POST['name'],
'caption' => $_POST['caption'],
'description' => $_POST['description']*/
);
//add the access token to it
$parameters['access_token'] = $access_token;
//build and call our Graph API request
$newpost = $facebook->api(
'/me/feed',
'POST',
$parameters
);
$success['status'] = "$xml->status";
$xml2 = new XMLGenerator($success, 'facebook','status');
$returnData = $xml2->output;
$returnData = APIResponse::successResponse('200', "$xml->status");
} catch (Exception $e) {
$returnData = APIResponse::errorResponse('400', 'Facebook Error: '.$e);
}
I assume I would have to change '/me/feed'? but to what? What is they have multiple pages how would my app know which page to post to?
Any help with this would be much appreciated.
You can substitute me with the PAGE_ID to post to a page e.g., /013857894/feed. Make sure that you have completed the OAuth process with the manage_pages and publish_stream permissions. You can learn more at the link below:
https://developers.facebook.com/docs/reference/api/page/#statuses
If the user has multiple Pages then you will first need to give them some way of selecting which page they want to post to. You can find out which Facebook Pages a given user is the administrator of by calling /me/accounts for that user. You can find out more about this approach in the Connections section of this page:
https://developers.facebook.com/docs/reference/api/user/
I currently force users to authenticate through Facebook each time they start a new session with my site. This means I force users to hit the url obtained through $facebook->getLoginURL() each time the browser is restarted.
When a user completes the login process, they are redirected to my login script:
{checks for CSRF token and error status...}
$facebook = new Facebook(array(
'appId' => '{my app id}',
'secret' => '{my app secret}',
'cookie' => true
));
//Get user info
$user = $facebook->getUser();
if($user)
echo 'user found';
else
echo 'no user!';
$user always results in 0; I am getting the expected 'state' variable and no errors in the API response. Also, I see that the relevant App permissions exist on my profile. However, $facebook->getUser() still returns 0. Is there some intermediate step that I'm missing (am I expected to do anything with the user's auth token?)
I know there are many threads on this problem but haven't found any resolutions. Also, I think this is a very basic example so I'm hoping the answer here will be more useful for future users dealing with the problem. Thanks!
I see that I can access a friend's groups via the Graph API:
https://graph.facebook.com/11111111/groups
... but how do I access it via FQL? (I am searching the documentation extensively before asking these questions, sorry if I'm asking an obvious one).
if you want to get the groups of user with the id 1111111
you can write this query:
select gid, name from group
where gid in (select gid from group_member where uid = 1111111)
don't forget you need to have the friends_groups permission in order to get this data
the documentation for those tables can be found here:
http://developers.facebook.com/docs/reference/fql/group_member/
http://developers.facebook.com/docs/reference/fql/group/
Yeah. I tried it did not work with FQL . But you can use the following code to get it via graph api
function get_groups($facebook)
{
require_once 'config.php';
global $facebook;
$groups = $facebook->api('/me/groups');
var_dump($groups);
return $groups;
}
The config file has the following :
<?php
require_once("facebook.php");
$app_id = "";//put the app id
$app_secret = "";//put app secret code inside " "
$facebook = new Facebook(array(
'appId' => $app_id,
'secret' => $app_secret,
'cookie' => true
));
if(is_null($facebook->getUser()))
{
header("Location:{$facebook->getLoginUrl(array('req_perms' => 'user_status,publish_stream,user_photos'))}");//include the permission you want here
exit;
}
?>