I followed the Facebook SDK for PHP docs and created two files, login.php and fb-callback.php, with all the lookup logic in fb-callback.php. When I do this, everything works fine.
But I want to move the lookup logic to get-posts.php and call it via ajax from fb-callback.php. When I do so, I can't seem to get the access token. I get the error noted below, "Access Token: Bad request".
I have registered both fb-config.php and get-posts.php as Valid OAuth Redirect URIs. So how do I get the proper parameters to get-posts.php?
Here are all the associated files:
login.php
<?php
require_once "config.php";
$redirectURL = 'https://' . $_SERVER[ 'SERVER_NAME' ] . '/r/fb-callback.php';
$permissions = ['email','user_photos','user_posts'];
$loginUrl = $helper->getLoginUrl($redirectURL, $permissions);
?>
<a href='<?php echo $loginUrl; ?>'>
<img src='continue-with-facebook.png'>
</a>
?>
config.php
<?php
if( !session_id() ) {
session_start();
}
require_once '/home/bitnami/vendor/autoload.php';
$fb = new Facebook\Facebook([
'app_id' => '---',
'app_secret' => '---',
'default_graph_version' => 'v3.1',
]);
$helper = $fb->getRedirectLoginHelper();
?>
fb-callback.php
<?php
require_once("config.php");
?>
<html>
<head>
<script type='text/javascript' src='jquery.js'></script>
<script>
var $j = jQuery.noConflict();
$j(document).ready(function () {
$j.ajax({
type: "GET",
url: "get-posts.php",
cache: false,
success: function (html) {
setTimeout(function () {
$j('#updateDiv').html(html);
}, 1000);
}
});
});
</script>
</head>
<body>
<div id='updateDiv'><img src='spinning.gif' alt='processing...'></div>
</body>
</html>
get-posts.php
<?php
require_once("config.php");
// get the posts for this user id
try {
$accessToken = $helper->getAccessToken();
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
echo __LINE__ . ' Access Token: Graph returned an error: ' . $e->getMessage();
exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo __LINE__ . ' Access Token: Facebook SDK returned an error: ' . $e->getMessage();
exit;
}
if (! isset($accessToken)) {
if ($helper->getError()) {
header('HTTP/1.0 401 Unauthorized');
echo "Error: " . $helper->getError() . "\n";
echo "Error Code: " . $helper->getErrorCode() . "\n";
echo "Error Reason: " . $helper->getErrorReason() . "\n";
echo "Error Description: " . $helper->getErrorDescription() . "\n";
} else {
header('HTTP/1.0 400 Bad Request');
echo __LINE__ . ' Access Token: Bad request';
}
exit;
}
...
from Facebook SDK access tokens and ajax
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