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POTrouble with OAuth 2.0 in my Facebook application
 

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  1. POTrouble with OAuth 2.0 in my Facebook application
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    <p>evertything was running fine in my facebook application until I upgraded it to OAuth 2.0, and im not sure if im doing everything right.</p> <p>The thing is that I already made the OAuth dialog to work and when the user authorizes the app, it renders my app into the iFrame, but I am having trouble with my $_GETs[], let me explain:</p> <p>Here's my index.php, which I use as the main page, while i just include() some file in a div called content, depending on the $_GET['section']:</p> <pre><code> $app_id = "xxx"; $application_secret = 'xxx'; $canvas_page = "xxx"; $auth_url = "http://www.facebook.com/dialog/oauth?client_id=".$app_id. "&amp;redirect_uri=".urlencode($canvas_page)."&amp;scope=publish_stream,offline_access"; //OAuth 2.0 function parse_signed_request($signed_request, $secret) { list($encoded_sig, $payload) = explode('.', $signed_request, 2); // decode the data $sig = base64_url_decode($encoded_sig); $data = json_decode(base64_url_decode($payload), true); if (strtoupper($data['algorithm']) !== 'HMAC-SHA256') { error_log('Unknown algorithm. Expected HMAC-SHA256'); return null; } // check sig $expected_sig = hash_hmac('sha256', $payload, $secret, $raw = true); if ($sig !== $expected_sig) { error_log('Bad Signed JSON signature!'); return null; } return $data; } function base64_url_decode($input) { return base64_decode(strtr($input, '-_', '+/')); } // $data = parse_signed_request($_REQUEST["signed_request"],$application_secret); if (empty($data["user_id"])) { echo("&lt;script&gt; top.location.href='" . $auth_url . "'&lt;/script&gt;"); } else { $_SESSION['on'] = 1; include ('src/facebook.php'); $files = array(); $files['RE'] = 'xxx.php'; $files['RC'] = 'yyy.php'; $files['DP'] = 'zzz.php'; $facebook = new Facebook(array( 'appId' =&gt; $app_id, 'secret' =&gt; $application_secret, 'cookie' =&gt; true, 'perms' =&gt; 'publish_stream, offline_access', )); $_SESSION["access_token"] = $data["oauth_token"]; $me = $facebook-&gt;api('/me?oauth_token='.$_SESSION["access_token"]); &lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" xmlns:fb="https://www.facebook.com/2008/fbml"&gt; &lt;link rel="stylesheet" href="css/style.css" type="text/css"&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"&gt; &lt;meta http-equiv="Content-Style-Type" content="text/css"&gt; &lt;meta property="og:title" content="title" /&gt; &lt;meta property="og:description" content="description" /&gt; &lt;meta property="og:image" content="thumbnail_image" /&gt; &lt;/head&gt; &lt;body&gt; &lt;div class="wrapper"&gt; &lt;?php include("inc/app_header.php");?&gt; &lt;div class="content"&gt; &lt;?php if(isset($_GET['section'])) { $file_to_include = 'inc/'.$files[$_GET['section']]; } else { $file_to_include = 'inc/section_restaurantes.php'; } include($file_to_include); ?&gt; &lt;div class="content_bottom_space"&gt;&lt;/div&gt; &lt;/div&gt; &lt;div class="footer"&gt; &lt;/div&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; &lt;?php } ?&gt; </code></pre> <p>and the code for section_restaurantes is:</p> <pre><code> &lt;div class="section_restaurantes"&gt; &lt;div class="restaurantes_container"&gt; &lt;div class="restaurantes"&gt;&lt;a href="index.php?section=DP"&gt;&lt;/a&gt;&lt;/div&gt; &lt;div class="restaurantes"&gt;&lt;a href="index.php?section=PH"&gt;&lt;/a&gt;&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; </code></pre> <p>The thing is that when I click in those divs all my browser is reloaded, the ?code= parameter in the url changes twice and it reloads again on section_restaurantes.php, instead of loading the DP section, I hope I'm clear.</p> <p>I think because its reloading twice i loose the $_GET['section'] parameter and then it loads the default which is "inc/section_restaurantes.php"</p> <p>I need help please, I've tried to find solutions on the internet but I found nothing.</p>
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    1. COYou are aware with the PHP-SDK you don't really need to parse the signed_request your self or even set the session, right?
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      1. POTrouble with OAuth 2.0 in my Facebook application
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    2. COI'm not sure how to retrieve the access token with another method
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      1. POTrouble with OAuth 2.0 in my Facebook application
      1. USPepe Ramirez
 

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