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matthanger/blti-launch.php

Last active May 5, 2025 20:36
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Revisions

  1. matthanger revised this gist Aug 17, 2020. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion blti-launch.php
    View file
    Original file line number Diff line number Diff line change
    @@ -3,7 +3,7 @@
    # START CONFIGURATION SECTION
    #

    $launch_url = "http://www.imsglobal.org/developers/BLTI/tool.php";
    $launch_url = "https://lti.tools/test/tp.php";
    $key = "12345";
    $secret = "secret";

  2. matthanger created this gist Aug 25, 2011.
    74 changes: 74 additions & 0 deletions blti-launch.php
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    Original file line number Diff line number Diff line change
    @@ -0,0 +1,74 @@
    <?php
    # ------------------------------
    # START CONFIGURATION SECTION
    #

    $launch_url = "http://www.imsglobal.org/developers/BLTI/tool.php";
    $key = "12345";
    $secret = "secret";

    $launch_data = array(
    "user_id" => "292832126",
    "roles" => "Instructor",
    "resource_link_id" => "120988f929-274612",
    "resource_link_title" => "Weekly Blog",
    "resource_link_description" => "A weekly blog.",
    "lis_person_name_full" => "Jane Q. Public",
    "lis_person_name_family" => "Public",
    "lis_person_name_given" => "Given",
    "lis_person_contact_email_primary" => "[email protected]",
    "lis_person_sourcedid" => "school.edu:user",
    "context_id" => "456434513",
    "context_title" => "Design of Personal Environments",
    "context_label" => "SI182",
    "tool_consumer_instance_guid" => "lmsng.school.edu",
    "tool_consumer_instance_description" => "University of School (LMSng)"
    );

    #
    # END OF CONFIGURATION SECTION
    # ------------------------------

    $now = new DateTime();

    $launch_data["lti_version"] = "LTI-1p0";
    $launch_data["lti_message_type"] = "basic-lti-launch-request";

    # Basic LTI uses OAuth to sign requests
    # OAuth Core 1.0 spec: http://oauth.net/core/1.0/

    $launch_data["oauth_callback"] = "about:blank";
    $launch_data["oauth_consumer_key"] = $key;
    $launch_data["oauth_version"] = "1.0";
    $launch_data["oauth_nonce"] = uniqid('', true);
    $launch_data["oauth_timestamp"] = $now->getTimestamp();
    $launch_data["oauth_signature_method"] = "HMAC-SHA1";

    # In OAuth, request parameters must be sorted by name
    $launch_data_keys = array_keys($launch_data);
    sort($launch_data_keys);

    $launch_params = array();
    foreach ($launch_data_keys as $key) {
    array_push($launch_params, $key . "=" . rawurlencode($launch_data[$key]));
    }

    $base_string = "POST&" . urlencode($launch_url) . "&" . rawurlencode(implode("&", $launch_params));
    $secret = urlencode($secret) . "&";
    $signature = base64_encode(hash_hmac("sha1", $base_string, $secret, true));

    ?>

    <html>
    <head></head>
    <!-- <body onload="document.ltiLaunchForm.submit();"> -->
    <body>
    <form id="ltiLaunchForm" name="ltiLaunchForm" method="POST" action="<?php printf($launch_url); ?>">
    <?php foreach ($launch_data as $k => $v ) { ?>
    <input type="hidden" name="<?php echo $k ?>" value="<?php echo $v ?>">
    <?php } ?>
    <input type="hidden" name="oauth_signature" value="<?php echo $signature ?>">
    <button type="submit">Launch</button>
    </form>
    <body>
    </html>