Odtnhj

Based on facebook instructions (Scenario 4) i am using the following URL

https://graph.facebook.com/oauth/access_token?client_id=APP_ID&client_secret=CLIENT_SECRET& grant_type=fb_exchange_token&fb_exchange_token=OLD_ACCESS_TOKEN

to get the new access token but i get the following:

"error":
"message": "Error validating access token: Session has expired at unix time 1365257820. The current unix time is 1365759029.",
"type": "OAuthException",
"code": 190,
"error_subcode": 463

does not work. Any help appreciated.

EDIT: Got it! Works like this

if access token expires run the below php script first on the browser after you store it on your server

<?php
 $app_id = "your app id";
 $app_secret = "your app secret"; 
 $my_url = "http://apps.facebook.com/your_app_name";

 // known valid access token stored in a database 
 $access_token = "your old access token";

 $code = $_REQUEST["code"];

 // If we get a code, it means that we have re-authed the user 
 //and can get a valid access_token. 
 if (isset($code)) 
 $token_url="https://graph.facebook.com/oauth/access_token?client_id="
 . $app_id . "&redirect_uri=" . urlencode($my_url) 
 . "&client_secret=" . $app_secret 
 . "&code=" . $code . "&display=popup";
 $response = file_get_contents($token_url);
 $params = null;
 parse_str($response, $params);
 $access_token = $params['access_token'];
 


 // Attempt to query the graph:
 $graph_url = "https://graph.facebook.com/me?"
 . "access_token=" . $access_token;
 $response = curl_get_file_contents($graph_url);
 $decoded_response = json_decode($response);

 //Check for errors 
 if ($decoded_response->error) 
 // check to see if this is an oAuth error:
 if ($decoded_response->error->type== "OAuthException") 
 // Retrieving a valid access token. 
 $dialog_url= "https://www.facebook.com/dialog/oauth?"
 . "client_id=" . $app_id 
 . "&redirect_uri=" . urlencode($my_url);
 echo("<script> top.location.href='" . $dialog_url 
 . "'</script>");
 
 else 
 echo "other error has happened";
 
 
 else 
 // success
 echo("success" . $decoded_response->name);
 echo($access_token);
 

 // note this wrapper function exists in order to circumvent PHP’s 
 //strict obeying of HTTP error codes. In this case, Facebook 
 //returns error code 400 which PHP obeys and wipes out 
 //the response.
 function curl_get_file_contents($URL) 
 $c = curl_init();
 curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($c, CURLOPT_URL, $URL);
 $contents = curl_exec($c);
 $err = curl_getinfo($c,CURLINFO_HTTP_CODE);
 curl_close($c);
 if ($contents) return $contents;
 else return FALSE;
 
?>

the above script will give you a URL like the one below on the browser

https://graph.facebook.com/oauth/access_token?code=…

then get the string (should be something like this: AQCn41Svv5DbWrnFY0Wf.....YbNm_yz2rE#_ )
after code= and paste it on the code= URL below and RUN the URL below on the browser

https://graph.facebook.com/oauth/access_token?client_id=App_Id&redirect_uri=http://apps.facebook.com/poemsoflove&client_secret=App_Secret&code=AQCn41Svv5DbWrnFY0Wf.....YbNm_yz2rE#_&display=popup

you will get the following respond which is a new access token for 60 days

access_token=<Extended_Access_Token>&expires=5180130

copy and paste the string after the access_token= to the script on your server that publishes the new posts on your page

1. Create application Facebook Developer Page
   

After with php can get live access toke

$app_id = 'Application Id';
$app_secret = 'Application Secret';
$access_token = "https://graph.facebook.com/oauth/access_token?client_id=$app_id&client_secret=$app_secret&grant_type=client_credentials";
$access_token = file_get_contents($access_token); // returns 'accesstoken=APP_TOKEN|APP_SECRET'
$access_token = str_replace('access_token=', '', $access_token);

$app_id = 'APP_ID';
$app_secret = 'APP_SECRET';
$access_token_url = "https://graph.facebook.com/oauth/access_token?client_id=$app_id&client_secret=$app_secret&grant_type=client_credentials";
$access_token_data = file_get_contents($access_token_url);
$access_token_arr = json_decode($access_token_data);
$access_token = $access_token_arr->access_token;