I'm using the php sdk v3.0.1.
I am trying to get offline access from users.
When my app requests permission from the user, it does so for the currently logged in user. I'd like to first check if a facebook account is logged in, and if so display a message. for example:
User "John Doe" is currently logged in.
then I'd have a link to "log out" or a link to continue to the permission page.
I was trying this but it always returns 0:
$facebook = new Facebook(array(
'appId' => 'XXX',
'secret' => 'YYYYYYYYY',
));
// Get User ID
$user = $facebook->getUser();
if($user)...
else...
the if statement always fails and then when the else is procesed and I send them to the login page, it requests permission for the currently logged in user (which I don't want).
I've searched extensively and can't find an answer. :-/ Any help or suggestions would be appreciated. I'm completely new to the facebook api.
Basically you would like authentication and permission requests to be separate. Correct me if I'm wrong about that. So you can just send users through a plain authentication step:
$loginUrl = $facebook->getLoginUrl();
and then later send them through again with the proper permissions.
$arg['req_perms'] = "[permissions here]";
$loginUrl = $facebook->getLoginUrl($arg);
This will get you a separate login and permission request step.
Related
Scenario is like this:
I have created an app in facebook say myApp.
I have integrated facebook login in my website say mywebsite.com.
I am intended to fetch user's "education_history" ,"work_history" ,"books" , "music".
I am not asking permissions for writing anything on user's facebook wall.
Here the problem.
I am able to fetch required information from facebook only when I logged in ( myapp created on my account only ) but when someone else try to login to mywebsite.com through facebook then I get only his public profile nothing else.
Why is it so ? What I am missing. All permissions are correct.
Thanks for help
EDITED :
Code for login URl :
// Return facebook or linkedIn login url
public function loginurl(){
// It is facebook
$login_url_params = array(
'scope' => 'email,user_actions.book,user_actions.fitness,user_actions.music,user_actions.news,user_actions.video,user_education_history,user_groups,user_hometown,user_interests,user_likes,user_website,user_work_history',
'redirect_uri' => 'http://localhost/users/store/fb/'
);
$login_url = $this->facebook->getLoginUrl($login_url_params);
echo "<a href=" . $login_url.'>Login</a>';
}
You should get a warning when you authorize some specific permissions as App Admin/Developer, telling you to review them:
Apps requesting more than public_profile, email and the user_friends permission must be reviewed by Facebook before those permissions can be requested from people
Here´s more information about the review process: https://developers.facebook.com/docs/apps/review
Localhost will only work for you, but not for other users. Except you are trying with another user on your computer, of course.
I've got some trouble with Facebook authentication. Even when I'm logged, the function getUser() returns 0
Here's my code :
$fb_params = array(
'appId' => APP_ID,
'secret' => SECRET_ID
);
$fb = new Facebook($fb_params);
echo $fb->getUser(); // UID
Someone's got an idea?
PS : 'I can no long access to $fb->api('/me'), it says it requires an access_token, I think it's linked to the authentication issue...'
Thanks
You are currently not authenticating as a user, only as an application. As a result, the Facebook API can't show you the /me page or respond to a getUser() call since it doesn't know what user you are trying to access the API on behalf of (ie. "Who is /me?"). You will also only be able to access publically-accessible information.
You need to get a user to authenticate your application through Oauth2, store the access_token you are returned, and then include it in any future calls (eg. WIRQjCey1.3600.1309525200.0-509450630|eD6SAR">https://graph.facebook.com/me?access_token=2227470867|2.AQB-_WIRQjCey1.3600.1309525200.0-509450630|eD6SAR...).
To do this using the PHP SDK you can do
$loginUrl = $fb->getLoginUrl();
echo "<a href='$loginUrl'>Login with Facebook</a>";
Clicking that link and having the user authenticate will store the access_token to the $_SESSION, and when you hit refresh the "new Facebook( $fb_params );" constructor will pick out the access token from the $_SESSION and use it for all future calls, so then calls like $fb->getUser(); will return correctly.
There's a functioning example in the examples folder of the SDK, here:
https://github.com/facebook/php-sdk.
You can use it to try calls while authenticated as an application (public data access only), and then as a user.
I'm doing an app for facebook anb i've requested permission for grab his information, but the data wasn't been saved.
The problem now is that I need their e-mail that was authorized before but I can't grab now. Now I know that I should have asked also the 'offline_access' permission.
:-/
Is there any other way to grab the e-mail now?
Somehting like some script on my FB page checking if the user has been authorized to know his e-mail, and if Yes, I grab the info, or something like that?
Thanks..
You have to get your users to re-visit your application and use a valid access token to fetch/store their e-mail address. You can't get access to a user's email address without a valid access token (either an offline_access token, or a standard one)
Well, that was the solution that saved me:
Sending to my e-mail all users that came back to my app, as I was looking for one e-mail specific (but I could save in the database instead)..
Enjoy,
Diego Trigo
#Creating the facebook object
$facebook = new Facebook(array(
'appId' => 'APP_ID',
'secret' => 'APP_SECRET',
'cookie' => true
));
# Let's see if we have an active session
$session = $facebook->getSession();
if($session){
try {
$facebook_id = $facebook->getUser();
$_fb_profile = $facebook->api('/me'); //if not null valid session
$facebook_name = $_fb_profile['name'];
$facebook_link = $_fb_profile['link'];
$facebook_email = $_fb_profile['email'];
mail('myemail#domain.com',$facebook_name,$facebook_email);
//echo "authorEmail = '$facebook_email';";
}
catch (FacebookApiException $e) {
//nothing..
}
I want to implement facebook connect on my site. I have used the oauth api to obtain a permissions request for the app.
However, I am having the following problem.
If a user signs into my site for the first time using facebook connect, i need to create a new username / password for him (on my site) to be able to surf my site and have all the session variables set. However, what should i use as the username / password ?
I understand that a facebook user can change his email address.
How do i handle users who are logging in using facebook connect for the second or third time (who are already members of my site) ? I need not create a user for them on my site as its already created when he logged in for the first time. Do i check for email address to see if the facebook user's email address exists in the database ? Also, comes the same problem that a facebook user can change his email address.
What is the one thing that does not change for a facebook user that i can use for his username ? Also, what do i use for his password ? Also, i understand that if i use username/password from available app data, then using normal mechanism a user can login to my site too. How do i prevent this security hole ?
Please help.
I use the information that facebook send in the callback (facebook unique user id or normal id)and then check if the user is on my database, if not i insert him but i leaving blank the othe rstuff like password or user email (also you can request that info too check the line 418 in the php api and add "'req_perms' => 'email',")because i can retrive that data when they connect again and then set the sessions like allways.
if the users change teh email just check that on every login and update the data.
example:
$facebook = new Facebook(array(
'appId' => 'xxxxxxxxx',
'secret' => 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
'cookie' => true,
));
$session = $facebook->getSession();
$me = null;
// Session based API call.
if ($session) {
try {
$uid = $facebook->getUser();
$me = $facebook->api('/me');
} catch (FacebookApiException $e) {
error_log($e);
}
}
// login or logout url will be needed depending on current user state.
if ($me) {
$logoutUrl = $facebook->getLogoutUrl();
} else {
$loginUrl = $facebook->getLoginUrl();
}
if ($me) {
if (!isset($_SESSION["usr_id"])){
$_SESSION["usr_id"] =$me['id'];
$_SESSION["usr_name"]=$me['name'];
// or do your sql verification and then set the sessions
}
}
/////////////////////////////////////////////
Facebook offers user's unique ID. You can recognize user with this information.
Maybe I searched completely in the wrong way, and the facebook documentation pretty much sucks in my opinion.
I was wondering, I'm connecting to facebook with the settings below and that works (I'm able to retrieve the profile information of the logged in user allows my application to access his profile.) Are there other options I can set, like the callback url and the expiration (which I want to set to never, so I can save the token in my db and re-use it)?
This is the config now:
$facebook = new Facebook(array(
'appId' => 'xxxxxxxxxxxx',
'secret' => 'xxxxxxxxxxxx',
'cookie' => true
));
I'm also connection to twitter and there I'm able to this:
$this->configTwitter = array(
'callbackUrl' => 'xxxxxxxxxxxx',
'siteUrl' => 'http://twitter.com/oauth',
'consumerKey' => 'xxxxxxxxxxxx',
'consumerSecret' => 'xxxxxxxxxxxx'
);
Thanks in advance!
Facebook should take a look at Twitter
After trying a few days, spitting the documentation of the Graph OAuth 2.0 (which doesn't work as good as expected and searching the internet I found a solution which I used to create the following script:
// Config
$this->redirectUrl = 'http://www.mywebsite.com/facebook'
$this->clientId = 'APPLICATION_ID';
$this->permissions = 'publish_stream,offline_access';
// Check if a sessions is present
if(!$_GET['session'])
{
// Authorize application
header('Location: http://www.facebook.com/connect/uiserver.php?app_id='.$this->clientId.'&next='.$this->redirectUrl.'&perms='.$this->permissions.'&return_session=1&session_version=3&fbconnect=0&canvas=1&legacy_return=1&method=permissions.request');
}
else
{
$token = json_decode($_GET['session']);
echo $token->access_token; // This is the access_token you'll need!
// Insert token in the database or whatever you want
}
This piece of code works great and performs the following actions:
Log in if the user isn't logged in to facebook
Asks if the user wants to add the application and grants the requested permissions (in my case: publish_stream and offline_access) in one dialog
returns to the page you specified under redirectUrl with an access_token (and because we requested for offline access this one doesn't expire)
I then store the token in the database so I won't have to request it again
Now you can, if you wish use the facebook code, or you're own code to get the users data, or other information from facebook (be sure you requested the right permissions)
Don't now if this is facebook-valid code, but it works great and I can easily define the 'config' like I wanted....
There are many settings you can set at the point of authenticating. Extended permissions let you set the offline_access so that you can authenticate and store your session in a db. More info on extended permissions are at developers.facebook.com/docs/authentication/permissions and you can read my blog post for more info on how to use them at http://www.joeyrivera.com/2010/facebook-graph-api-app-easy-w-php-sdk/