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I am developing an LTI 1.3, however for all my resource instances I get the same resourceLink, which has the context ID as an identifier. Why does this happen?   Defining the scope for my lti: I am currently linking the LTI directly with the url: After that, my lti resource is already part of my course, everything seems to be going well so far. } When entering the resource, I don't get information from the resource, like the name it was assigned in canvas, the id of my resourceLink is the same id of the context. The real problem occurs now, if within my course I repeat these steps and add more resources from the same LTI, they will all have the same resourceLink, therefore, within my LTI I cannot differentiate the resource (Since all resourceLink IDs are the same) and therefore all the data within the LTI will be crossed between module item instances.       ... View more

Hello, I am new to LTI development and I am currently trying to get my first "Hello World" on LTI 1.3, but I have encountered some difficulties. I have integrated a test application that I found on github to make sure I understand the configuration parameters, after solving a couple of problems I have succeeded. The problem with this application is that it does not have very clean code to be able to carry this to a framework such as laravel or similar, for which I find myself in the need to understand the integration flow in detail in order to create my own work environment. Sample application  The problem comes because I am not receiving the id_token after executing my query, failing that I get an "authenticity_token" next to "login_required", which I don't understand exactly what it means. My connection code looks like this: require_once("vendor/autoload.php"); use GuzzleHttp\Client; // This constant are obtained from LMS platform. define('PLATFORM_ID', 'https://canvas.beta.instructure.com'); define('CLIENT_ID', 'MY_CLIENT_ID'); define('DEPLOYMENT_ID', 'MY_DEPLOYMENT_ID'); define('AUTHENTICATION_URL', 'https://canvas.beta.instructure.com/api/lti/authorize_redirect'); define('PLATFORM_JSON_WEBKEY_URL', 'https://canvas.beta.instructure.com/api/lti/security/jwks'); // STEP 1 // Receiving authentication parameters print_r($_REQUEST); // die; // STEP 2 // Creating authentication request if(isset($_REQUEST['iss']) && isset($_REQUEST['login_hint']) && isset($_REQUEST['lti_message_hint'])){ $nonce = getRandomString(); $params = array( 'client_id' => CLIENT_ID, 'login_hint' => $_REQUEST['login_hint'], 'lti_message_hint' => $_REQUEST['lti_message_hint'], 'nonce' => $nonce, 'prompt' => 'none', 'redirect_uri' => "http://localhost/clean_integration/connect.php", 'response_mode' => 'form_post', 'response_type' => 'id_token', 'scope' => 'openid', 'state' => $nonce ); $options = [ 'form_params' => $params ]; try{ $client = new Client(); $res = $client->request('POST', AUTHENTICATION_URL, $options); echo $res->getBody(); }catch(Exception $e){ die("Exception: {$e}"); } } function getRandomString($length = 8){ $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; $value = ''; $charsLength = strlen($chars) - 1; for ($i = 1; $i <= $length; $i++) { $value .= $chars[rand(0, $charsLength)]; } return $value; }   When my app start,  Array ( [iss] => https://canvas.beta.instructure.com [login_hint] => HINT [client_id] => CLIENT_ID [target_link_uri] => http://localhost/clean_integration/connect.php [lti_message_hint] => HASH1.HASH2.HASH3 [canvas_region] => us-east-1 ) After running my request I get the following, when actually I should get the token id (From what I understand I could be wrong at this point) Array ( [utf8] => ✓ [authenticity_token] => SOME TOKEN THAT IS NOT JWT [error] => login_required [error_description] => Must have an active user session [state] => 9kofXdDs )   If anyone can help me with the following questions I am very grateful. 1 - What am I doing wrong so that the token id with the user and resource data does not return? Am I missing a step? 2.- How can I use the member service (LTI Adventage) ... View more