<?php
session_start();
require_once('AppInfo.php');
require_once('utils.php');
require_once('sdk/src/facebook.php');
$facebook = new Facebook(array(
'appId' => 'APP_ID',
'secret' => 'APP_SECRET',
));
$app_token="XXXXXX"; //long life access_token should be better
$attachment = array
(
"access_token"=>"$app_token",
"message" => "Interesting App",
"name" => "MyApp",
"caption" => "About MyApp",
"link" => "http://facebook.com/", //your own url
"description" => "Awesome App",
"scope" => "publish_stream"
);
$result = $facebook->api("/USER_ID/feed","POST",$attachment);
print_r($result );
?>
Thursday, April 4, 2013
post on user's timeline by app
send request from app to user using javascript
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:fb="https://www.facebook.com/2008/fbml">
<head>
<title>MyNTU Request</title>
</head>
<body>
<div id="fb-root"></div>
<script src="http://connect.facebook.net/en_US/all.js"></script>
<script>
FB.init({
appId : 'xxxxxxxxxxx', //your app id
frictionlessRequests: true
});
FB.ui({method: 'apprequests',
message: 'My Great Request',
to: 'xxxxxx' //user id you want to send to
}, requestCallback);
function requestCallback(response) {
// Handle callback heres
}
</script>
</body>
</html>
send request from app to user using php
<?php
$app_id = "YOUR_APP_ID";
$app_secret = "YOUR_APP_SECRET";
$token_url = "https://graph.facebook.com/oauth/access_token?" .
"client_id=" . $app_id .
"&client_secret=" . $app_secret .
"&grant_type=client_credentials";
$app_access= file_get_contents($token_url);
$app_access_token = json_decode($app_access, true);
$user_id ="USER_ID";
$apprequest_url ="https://graph.facebook.com/" .
$user_id .
"/apprequests?message='INSERT_UT8_STRING_MSG'" .
"&data='INSERT_STRING_DATA'&" .
$app_access_token . "&method=post";
$result = file_get_contents($apprequest_url);
$obj = json_decode($result, true);
print_r($app_access_token);
print_r($obj);
?>
Tuesday, April 2, 2013
get user realtime update for your app
First, you should go to your app setting page in facebook developer home page.
when you reach the app setting panel or dashboard,
choose Settings-Realtime Updates
then in the dashboard, you can
1) in fields: input some the field you like, such as hometown_location
2) in callback: input your app url
if your app url is http://myapp.com
and your file to preocess the realtime update is update.php
then you should input: http://myapp.com/update.php
3) in verify token, you should input one string you like, e.g.: myfacebookapp123
save the changes.
Then you should prepare the update.php file on your server, you could copy the following code to your update.php file
when you reach the app setting panel or dashboard,
choose Settings-Realtime Updates
then in the dashboard, you can
1) in fields: input some the field you like, such as hometown_location
2) in callback: input your app url
if your app url is http://myapp.com
and your file to preocess the realtime update is update.php
then you should input: http://myapp.com/update.php
3) in verify token, you should input one string you like, e.g.: myfacebookapp123
save the changes.
Then you should prepare the update.php file on your server, you could copy the following code to your update.php file
<?php
$verify_token = myfacebookapp123';
if ($_SERVER['REQUEST_METHOD'] == 'GET' && isset($_GET['hub_mode'])
&& $_GET['hub_mode'] == 'subscribe' && isset($_GET['hub_verify_token'])
&& $_GET['hub_verify_token'] == $verify_token)
{
echo $_GET['hub_challenge'];
} else if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
$post_body = file_get_contents('php://input');
$obj = json_decode($post_body, true);
$myFile = "testFile.txt";
$fh = fopen($myFile, 'a+') or die("can't open file");
$stringData = "Something updates, pls go to get it!\n";
fwrite($fh, $stringData);
fclose($fh);
}
?>
Now you can go to facebook and modify one user's(who has authened your app before) hometown. after 1-2 minutes, your server could generate one testFile.txt with "Something updates, pls go to get it!"
This post dose not analyze the content in $obj . it is something like this:
/*
{
"object": "user",
"entry": [
{
"uid": 1335845740,
"changed_fields": [
"name",
"picture"
],
"time": 232323
}, {
"uid": 1234,
"changed_fields": [
"friends"
],
"time": 232325
}
]
}
*/
you can try to get them respectively use php.
One thing we should pay attention to is that: through realtime update, we can only get the which filed has been updated, such as hometown. but we do not know what is the user's latest howntown unless we write codes to crawl that data.
get the access token and extend its lifetime for your app
1. the basic idea is : use your 'state' get 'code', then use 'code' get 'access_token', finally use current access_token to get the 60-day long access-token. thus, even the user is not logged into facebook, you can still access his data:
2. use the short-term token to get the 60-day access token
If your current token is not expired yet, you are likely to get the same token but with longer life(60 days) you can also see how long it will last every time you refresh the page.
<?php
$app_id = "YOUR_APP_ID";
$app_secret = "APP_SECRET";
$my_url = "YOUR_URL";
session_start();
$code = $_REQUEST["code"];
if(empty($code)) {
$_SESSION['state'] = md5(uniqid(rand(), TRUE)); // CSRF protection
$dialog_url = "https://www.facebook.com/dialog/oauth?client_id="
. $app_id . "&redirect_uri=" . urlencode($my_url) . "&state="
. $_SESSION['state'] . "&scope=user_birthday,user_hometown, read_stream, friends_likes, email, user_status, publish_stream, status_update,offline_access";
header("Location: " . $dialog_url);
}
if($_SESSION['state'] && ($_SESSION['state'] === $_REQUEST['state'])) {
$token_url = "https://graph.facebook.com/oauth/access_token?"
. "client_id=" . $app_id . "&redirect_uri=" . urlencode($my_url)
. "&client_secret=" . $app_secret . "&code=" . $code;
$response = file_get_contents($token_url);
$params = null;
parse_str($response, $params);
$_SESSION['access_token'] = $params['access_token'];
$graph_url = "https://graph.facebook.com/me/feed?access_token="
. $params['access_token'];
$user = json_decode(file_get_contents($graph_url),TRUE);//get all the data related with 'feed'
echo "</br>";
echo "<h3>Your infomation are:</h3>";
echo "</br>";
print_r($user);
echo "</br>";
echo "</br>";
}
else {
echo("The state does not match. You may be a victim of CSRF.");
}
?>
2. use the short-term token to get the 60-day access token
<?php
$my_token_url="https://graph.facebook.com/oauth/access_token?
grant_type=fb_exchange_token&
client_id=YOUR_APP_ID&
client_secret=YOUR_APP_SECRET&
fb_exchange_token=YOUR_CURRENT_ACCESS_TOKEN";
header("Location: " . $my_token_url);
?>
If your current token is not expired yet, you are likely to get the same token but with longer life(60 days) you can also see how long it will last every time you refresh the page.
redirect out of iFrame
In that case, you should use:
But first, you should realize that you are located in one iFrame then.
echo "<script>self.parent.location.href = 'YOUR_URL'</script>";instead of
echo "<script>location.href = 'YOUR_URL'</script>";
But first, you should realize that you are located in one iFrame then.
all the 'scope' options in facebook app development
our app always ask for user permission, but you should type the correct offcial permission in the scope parameter.
e.g
function authUser() {
FB.login(checkLoginStatus, {scope:'user_hometown, read_stream, friends_likes, email, user_status, publish_stream, status_update,offline_access'});
}
if you want get the user's hometowm permission, you should type user_hometown instead of just hometown, otherwise you can never get this permission.
all below is all the latest scope options supported by facebook
/* Supported scopes: ads_management create_event create_note email export_stream friends_about_me friends_activities friends_birthday friends_checkins friends_education_history friends_events friends_games_activity friends_groups friends_hometown friends_interests friends_likes friends_location friends_notes friends_online_presence friends_photo_video_tags friends_photos friends_questions friends_relationship_details friends_relationships friends_religion_politics friends_status friends_subscriptions friends_videos friends_website friends_work_history manage_friendlists manage_notifications manage_pages offline_access photo_upload publish_actions publish_checkins publish_stream read_friendlists read_insights read_mailbox read_page_mailboxes read_requests read_stream rsvp_event share_item sms status_update user_about_me user_activities user_birthday user_checkins user_education_history user_events user_games_activity user_groups user_hometown user_interests user_likes user_location user_notes user_online_presence user_photo_video_tags user_photos user_questions user_relationship_details user_relationships user_religion_politics user_status user_subscriptions user_videos user_website user_work_history video_upload xmpp_login */
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