Lấy access token

get_access_token.js

var url = "https://www.facebook.com/v1.0/dialog/oauth/confirm";

var data = 'fb_dtsg=' +  document['getElementsByName']('fb_dtsg')[0]['value'] + '&app_id=165907476854626&redirect_uri=fbconnect://success&display=popup&access_token=&sdk=&from_post=1&private=&tos=&login=&read=&write=&extended=&social_confirm=&confirm=&seen_scopes=&auth_type=&auth_token=&auth_nonce=&default_audience=&ref=Default&return_format=access_token&domain=&sso_device=ios&__CONFIRM__=1';

var access_token = "";

var xhr = new XMLHttpRequest;
xhr.open('POST', url, true);
xhr.onreadystatechange = function() {
	if (xhr.readyState == XMLHttpRequest.DONE && xhr.status == 200) {
		access_token = xhr.responseText.match(/token=(.+)&/)[1];

		// đã lấy dc access token
		console.log(access_token);
	}
}
xhr.send(data);