How to share with access token? - facebook

Question

I have write this code but it does work only if I am already logged in facebook, otherwise appears a popup window that require me email and password to login in facebook.
This is the code:
window.fbAsyncInit = function () {
FB.init({
appId: 'xxx',
frictionlessRequests: true,
status: true,
cookie: true,
xfbml: true,
oauth: true
});
function update(response) {
if (response.authResponse) {
FB.api('/me', function (info) {
login(response, info);
});
} else {
}
}
FB.getLoginStatus(update);
};
(function () {
var e = document.createElement('script');
e.async = true;
e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js';
document.getElementById('fb-root').appendChild(e);
}());
function login(response, info) {
if (response.authResponse) {
publish();
}
}
function publish() {
var publish = {
method: 'feed',
access_token: '<?php echo $token; ?>',
message: 'How are you ?',
name: 'hi friends',
caption: 'yuhuuuuuuuu',
description: (' '),
link: 'http://www.example.com',
picture: 'http://cdn1.hark.com/images/000/004/514/4514/original.jpg',
actions: [{
name: 'Hello',
link: 'http://www.example.com/'
}],
user_message_prompt: 'Share on facebook'
};
FB.ui(
publish, function (response) {
if (response && response.post_id) {
alert('Post was published.');
} else {
alert('Post was not published.');
}
});
}

Answer 1

In your update method, in the blank else you should call the FB.login method:
Calling FB.login prompts the user to authenticate your application
using the OAuth Dialog.
However, you can't just do this:
function update(response) {
if (response.authResponse) {
FB.api('/me', function (info) {
login(response, info);
});
} else {
FB.login(function(response) {
if (response.authResponse) {
console.log("user is logged in!", response.authResponse);
}
});
}
}
Since as it states in the documentation:
Calling FB.login results in the JS SDK attempting to open a popup
window. As such, this method should only be called after a user click
event, otherwise the popup window will be blocked by most browsers.
You'll have to show a user a button or something that tells him to click in order to login, and then you can call the FB.login method.