found a good tutorial movie at Email received from FB regarding authentication data.

Unfortunately my apps doesn’t use facebook connect. At forum, some says PHP SDK is doubtful. I will check it again…

Switch to regular connection (http)?
Sorry! We can’t display this content while you’re viewing Facebook over a secure connection (https).
Would you like to temporarily switch to a regular connection (http) to use this app?
You will have a secure connection upon your next login.

So facebook app developers must use SSL. When you develop apps with Google App Engine, you need to add “secure:optional” to your handlers. “Optional” supports both http and https. It switches protocol automatically. My apps which were made with Google App Engine work fine.

handlers:
- url: /youraccount/.*
script: facebookapp.py
secure: optional

(Secure URLs)

blog:
Facebook Tells Some Developers They Have 48 Hours to Fix Authentication Data Leaks

forum:
Email received from FB regarding authentication data

related?:
Facebook Applications Accidentally Leaking Access to Third Parties – Updated

tools:
Slavi’s Free Tools:to create/delete facebook test users online
Charles:to check data transfer
Fiddler:to check data transfer

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http://bugs.developers.facebook.net/show_bug.cgi?id=15933

Facebook Platform .:. Bug 15933 – Inconsistent "Invalid OAuth 2.0 Access Token" errors via kwout

I checked programs and finally found out what caused the trouble.

At facebook app’s property, “OAuth 2.0 for Canvas” was disabled. After I changed “OAuth 2.0 for Canvas” to “enabled”, apps run correctly.

Recently “OAuth 2.0 for Canvas” is “enabled” when you set up new facebook apps. But if you made FB apps a year ago, it may be good to check your apps’ property.

Here’s a solution. I found this at comments of Graph API & IFrame Base Facebook Application Development.

Adding two lines below to facebook.php will prevent you from certificate problem.

$opts[CURLOPT_SSL_VERIFYHOST] = 0;
$opts[CURLOPT_SSL_VERIFYPEER] = 0;

Therefore makeRequest of facebook.php will be like below.

protected function makeRequest($url, $params, $ch=null) {
if (!$ch) {
$ch = curl_init();
}

$opts = self::$CURL_OPTS;
$opts[CURLOPT_POSTFIELDS] = $params;
$opts[CURLOPT_URL] = $url;
$opts[CURLOPT_SSL_VERIFYHOST] = 0;
$opts[CURLOPT_SSL_VERIFYPEER] = 0;
curl_setopt_array($ch, $opts);
$result = curl_exec($ch);
if ($result === false) {
$e = new FacebookApiException(array(
‘error_code’ => curl_errno($ch),
‘error’ => array(
‘message’ => curl_error($ch),
‘type’ => ‘CurlException’,
),
));
curl_close($ch);
throw $e;
}
curl_close($ch);
return $result;
}

I won’t accept their explanations. Unfrined manager actually has no function to unfriend.

But I guess a word “unfriend” must be threat to facebook. The more people get unfriend, the more pageviews facebook lose.

So I tryed using Javascript to resize. Then…it works!

At first, add reading facebook JS to your html.

<script src=”http://connect.facebook.net/en_US/all.js”></script>

Then add javascript to your html.

<div id=”fb-root”></div>
<script>
window.fbAsyncInit = function() {
FB.init({appId: ‘{{ FB_APPID }}’, status: true, cookie: true,xfbml: true});
FB.Canvas.setAutoResize();
};
(function() {
var e = document.createElement(‘script’);
e.type = ‘text/javascript’;
e.src = document.location.protocol + ‘//connect.facebook.net/en_US/all.js’;
e.async = true;
document.getElementById(‘fb-root’).appendChild(e);
}());
</script>

(*put your appid to {{ FB_APPID }}. I’d wrote PHP program to login onto fb.)

I dont guarantee this works on your apps. But if you have no idea how to resize, it may be good to try. (Don’t forget set your app to IFRAME and Auto-resize)

Quote from my PHP source is below.

$facebook->setFileUploadSupport(true);
$tags = array(
‘tag_text’ => ‘ak Yip’,
‘tag_uid’ => 642536423,//it’s my id on facebook as a sample
‘x’ => 10,
‘y’ => 10,
);

$args['tags'] = array($tags);
$args['image'] = ‘@’ . realpath($fn);
$data = $facebook->api(‘/me/photos’, ‘post’, $args);

Two important things.

One:Your app need to get permissions like ‘user_photo_video_tags’ and ‘friends_photo_video_tags’.

Two:X,Y is proportion, not coordinate. Don’t put value over 100.