To detect the facebook user online/offline status we use the method FB.getLoginStatus method.
But, what does the paramater("response") mean and where does it come from in the below code snippet
the parameter response mean in the line " FB.getLoginStatus(function(response) "
FB.getLoginStatus(function(response) {
console.log(response);
if (response.status === 'connected') {
// the user is logged in and has authenticated your
// app, and response.authResponse supplies
// the user's ID, a valid access token, a signed
// request, and the time the access token
// and signed request each expire
var uid = response.authResponse.userID;
var accessToken = response.authResponse.accessToken;
console.log('User logged in and autenticated');
} else if (response.status === 'not_authorized') {
// the user is logged in to Facebook,
// but has not authenticated your app
console.log('User logged in, but not autorized');
} else {
// the user isn't logged in to Facebook.
console.log('User not logged in');
}
}, true);
You are specifying a function to be called when the Facebook API has completed retrieving a response from the server. It passes the response object to the function which you specify. A typical response would be:
{
status: 'connected',
authResponse: {
accessToken: '...',
expiresIn:'...',
signedRequest:'...',
userID:'...'
}
}
See facebook javascript docs for more info
Related
I have the following code to display the users on my site.
function getFBData()
{
FB.api(
'/*fbID*/',
function (response) {
if (response && !response.error) {
/*CODE*/
}
}
);
}
getFBData();
It was working fine when a user is logged in, via Facebook plugin, into the site. But nothing is fetched when the user is not logged in.
Is a user really needed to be logged in to execute FB.api?
Actually user must be logged in to Facebook to use Facebook Api,
you can use the code below to check the state of the user to either get his data if connected or ask him to login again.
FB.init({
appId: 'xxxxxxxxxxxxxxxxxxx',
channelUrl: '//www.yoursite.com/fbsdk-channel.aspx',
status: true,
cookie: true,
xfbml: true,
oauth: true
});
FB.getLoginStatus(function (response) {
if (response.status === 'not_authorized') {
/* The user has already logged into FB but not authorized the your webpage */
}
else if (response.status === 'connected') {
/* The user has logged into FB and authorized the "App" to get their user information */
}
else { /* The user has not yet logged into FB */ }
}
It depends, you CAN use FB.api without authorization, but only for API calls that need an App Access Token. For API calls with a User Token, you do need authorization. Of course you can´t grab details of a user (by ID) without authborization, so in your case you must authorize the user.
More information about Access Tokens and login:
https://developers.facebook.com/docs/facebook-login/access-tokens
http://www.devils-heaven.com/facebook-access-tokens/
http://www.devils-heaven.com/facebook-javascript-sdk-login/
I follow a tutor for connection with Facebook which uses the following code to connect to Facebook successfully.
The code follows -
FB.Event.subscribe('auth.authResponseChange', function (response) {
if (response.status === 'connected') {
// the user is logged in and has authenticated your
// app, and response.authResponse supplies
// the user's ID, a valid access token, a signed
// request, and the time the access token
// and signed request each expire
var uid = response.authResponse.userID;
var accessToken = response.authResponse.accessToken;
// TODO: Handle the access token
// Do a post to the server to finish the logon
// This is a form post since we don't want to use AJAX
var form = document.createElement("form");
form.setAttribute("method", 'post');
form.setAttribute("action", 'loadMainPage.ashx');
var field = document.createElement("input");
field.setAttribute("type", "hidden");
field.setAttribute("name", 'accessToken');
field.setAttribute("value", accessToken);
form.appendChild(field);
document.body.appendChild(form);
form.submit();
} else if (response.status === 'not_authorized') {
// the user is logged in to Facebook,
// but has not authenticated your app
} else {
// the user isn't logged in to Facebook.
}
});
};
How can I ask for publish_actions permission ?
What platform are you using? See Facebook's official docs.
An excerpt:
Requesting permissions
Each type of login flow has its own method of requesting these permissions:
Web login with the JavaScript SDK uses a scope option with the FB.login function call.
Other types of web login should add the scope parameter to the Login
dialog URL that they redirect to.
Android login uses the setReadPermissions and setPublishPermissions
on the LoginButton class.
iOS login uses the readPermissions and publishPermissions properties
in the FBLoginView class.
I’m creating a custom share to facebook functionality, which has been more complicated than I originally thought.
I’ve had to create a facebook app and then use It’s ID to get it going.
If you try to share the page on facebook, it gets you login to facebook(if not logged in), then it requests access to your profile(only on your first share), and then proceeds to share dialogue to let you share it.
However I’ve noticed that other sites including youtube and BBC, that they don’t request access to share on facebook, It will take you straight to the share dialogue instead.
Is there a way to achieve this?
Code using is below:
<script type="text/javascript" src="http://connect.facebook.net/en_US/all.js"></script>
<script>
FB.init({
appId : '*APP_ID*', // App ID
status : true, // check login status
cookie : true, // enable cookies to allow the server to access the session
xfbml : true, // parse XFBML
link : '*LINK*'
});
$('.share-print .facebook > a').click(function(e){
e.preventDefault();
FB.getLoginStatus(function(response) {
if (response.status === 'connected') {
facebookSend();
var uid = response.authResponse.userID;
var accessToken = response.authResponse.accessToken;
} else if (response.status === 'not_authorized') {
// the user is logged in to Facebook,
// but has not authenticated your app
FB.login(function(response) {
if (response.authResponse) {
console.log('Logged in');
facebookSend();
} else {
console.log('Not logged in');
}
});
} else {
// the user isn't logged in to Facebook.
FB.login(function(response) {
if (response.authResponse) {
console.log('Logged in');
facebookSend();
} else {
console.log('Not logged in');
}
});
}
});
});
var facebookSend = function() {
console.log('facebookSend started');
FB.ui({
method: 'feed',
display: 'iframe',
link: '*PAGE_LINK*'
});
}
</script>
I am trying to use Facebook javascript library function : FB.getLoginStatus.
This function works when the user is logged but fails when user is not logged to facebook.
Here is my code:
FB.getLoginStatus(function (response) {
console.log('entering the function!');
if (response.status === 'connected') {
FB.api('/me', function (response) {
if (response.name != undefined) {
console.log("Welcome, " + response.name);
}
});
} else if (response.status === 'not_authorized') {
console.log('not logged to app');
} else {
// NEVER POPUP
console.log('user not logged');
}
});
The last event (user not logged never popup), when a user is not logged, the function is not event firing and I do not see the log [entering the function].
Do someone has an idea to detect if a facebook user is connected.
Regards,
Linvi
I sent a bug report for this issue and Facebook developer reported that it was actually a current known issue.
I want to get the user's FID, Email and Name after login with Javascript so I make an Ajax call and save them to the database.
This is currently the code to login users:
if (response.status === 'connected') { // the user is logged in and connected to your application
var uid = response.authResponse.userID;
var accessToken = response.authResponse.accessToken;
// Alert with fid, email and name
} else { //the user isn't logged in to Facebook or isn't connected to the application
FB.login(function(response) {
if (response.authResponse) {
accessToken = response.authResponse.accessToken;
// Alert with fid, email and name
}
}, {scope: 'email'});
}
How can I do it?
Call
https://graph.facebook.com/me
or
https://graph.facebook.com/USER_ID
or
https://graph.facebook.com/fql?q=SELECT uid,name,email FROM user WHERE uid=me()
You'll need the
email
permission