+++ /dev/null
-<?php
-
-require_once 'OAuth.php';
-
- // Replace this with some real function that pulls from the LMS.
- function getLMSDummyData() {
- $parms = array(
- "resource_link_id" => "120988f929-274612",
- "resource_link_title" => "Weekly Blog",
- "resource_link_description" => "Each student needs to reflect on the weekly reading. These should be one paragraph long.",
- "user_id" => "292832126",
- "roles" => "Instructor", // or Learner
- "lis_person_name_full" => 'Jane Q. Public',
- "lis_person_contact_email_primary" => "user@school.edu",
- "lis_person_sourcedid" => "school.edu:user",
- "context_id" => "456434513",
- "context_title" => "Design of Personal Environments",
- "context_label" => "SI182",
- );
-
- return $parms;
- }
-
- function validateDescriptor($descriptor)
- {
- $xml = new SimpleXMLElement($xmldata);
- if ( ! $xml ) {
- echo("Error parsing Descriptor XML\n");
- return;
- }
- $launch_url = $xml->secure_launch_url[0];
- if ( ! $launch_url ) $launch_url = $xml->launch_url[0];
- if ( $launch_url ) $launch_url = (string) $launch_url;
- return $launch_url;
- }
-
- // Parse a descriptor
- function launchInfo($xmldata) {
- $xml = new SimpleXMLElement($xmldata);
- if ( ! $xml ) {
- echo("Error parsing Descriptor XML\n");
- return;
- }
- $launch_url = $xml->secure_launch_url[0];
- if ( ! $launch_url ) $launch_url = $xml->launch_url[0];
- if ( $launch_url ) $launch_url = (string) $launch_url;
- $custom = array();
- if ( $xml->custom[0]->parameter )
- foreach ( $xml->custom[0]->parameter as $resource) {
- $key = (string) $resource['key'];
- $key = strtolower($key);
- $nk = "";
- for($i=0; $i < strlen($key); $i++) {
- $ch = substr($key,$i,1);
- if ( $ch >= "a" && $ch <= "z" ) $nk .= $ch;
- else if ( $ch >= "0" && $ch <= "9" ) $nk .= $ch;
- else $nk .= "_";
- }
- $value = (string) $resource;
- $custom["custom_".$nk] = $value;
- }
- return array("launch_url" => $launch_url, "custom" => $custom ) ;
- }
-
-function split_custom_parameters($custom) {
- $retval = array();
- return merge_custom_parameters($retval, $custom);
-}
-
-function merge_custom_parameters($retval, $custom) {
- $lines = preg_split("/[\n;]/",$custom);
- foreach ($lines as $line){
- $pos = strpos($line,"=");
- if ( $pos === false || $pos < 1 ) continue;
- $key = trim(substr($line, 0, $pos));
- $val = trim(substr($line, $pos+1));
- $key = 'custom_'.map_keyname($key);
- if ( isset($retval[$key])) continue;
- $retval[$key] = $val;
- }
- return $retval;
-}
-
-function map_keyname($key) {
- $newkey = "";
- $key = strtolower(trim($key));
- foreach (str_split($key) as $ch) {
- if ( ($ch >= 'a' && $ch <= 'z') || ($ch >= '0' && $ch <= '9') ) {
- $newkey .= $ch;
- } else {
- $newkey .= '_';
- }
- }
- return $newkey;
-}
-
-function signParameters($oldparms, $endpoint, $method, $oauth_consumer_key, $oauth_consumer_secret,
- $submit_text = false, $org_id = false, $org_desc = false)
-{
- global $last_base_string;
- $parms = $oldparms;
- if ( ! isset($parms["lti_version"]) ) $parms["lti_version"] = "LTI-1p0";
- if ( ! isset($parms["lti_message_type"]) ) $parms["lti_message_type"] = "basic-lti-launch-request";
- if ( ! isset($parms["oauth_callback"]) ) $parms["oauth_callback"] = "about:blank";
- if ( $org_id ) $parms["tool_consumer_instance_guid"] = $org_id;
- if ( $org_desc ) $parms["tool_consumer_instance_description"] = $org_desc;
- if ( $submit_text ) $parms["ext_submit"] = $submit_text;
-
- $test_token = '';
-
- $hmac_method = new OAuthSignatureMethod_HMAC_SHA1();
- $test_consumer = new OAuthConsumer($oauth_consumer_key, $oauth_consumer_secret, NULL);
-
- $acc_req = OAuthRequest::from_consumer_and_token($test_consumer, $test_token, $method, $endpoint, $parms);
- $acc_req->sign_request($hmac_method, $test_consumer, $test_token);
-
- // Pass this back up "out of band" for debugging
- $last_base_string = $acc_req->get_signature_base_string();
-
- $newparms = $acc_req->get_parameters();
-
- return $newparms;
-}
-
-function postLaunchHTML($newparms, $endpoint, $debug=false, $iframeattr=false) {
- global $last_base_string;
- $r = "<div id=\"ltiLaunchFormSubmitArea\">\n";
- if ( $iframeattr ) {
- $r = "<form action=\"".$endpoint."\" name=\"ltiLaunchForm\" id=\"ltiLaunchForm\" method=\"post\" target=\"basicltiLaunchFrame\" encType=\"application/x-www-form-urlencoded\">\n" ;
- } else {
- $r = "<form action=\"".$endpoint."\" name=\"ltiLaunchForm\" id=\"ltiLaunchForm\" method=\"post\" encType=\"application/x-www-form-urlencoded\">\n" ;
- }
- $submit_text = $newparms['ext_submit'];
- foreach($newparms as $key => $value ) {
- $key = htmlspecialchars($key);
- $value = htmlspecialchars($value);
- if ( $key == "ext_submit" ) {
- $r .= "<input type=\"submit\" name=\"";
- } else {
- $r .= "<input type=\"hidden\" name=\"";
- }
- $r .= $key;
- $r .= "\" value=\"";
- $r .= $value;
- $r .= "\"/>\n";
- }
- if ( $debug ) {
- $r .= "<script language=\"javascript\"> \n";
- $r .= " //<![CDATA[ \n" ;
- $r .= "function basicltiDebugToggle() {\n";
- $r .= " var ele = document.getElementById(\"basicltiDebug\");\n";
- $r .= " if(ele.style.display == \"block\") {\n";
- $r .= " ele.style.display = \"none\";\n";
- $r .= " }\n";
- $r .= " else {\n";
- $r .= " ele.style.display = \"block\";\n";
- $r .= " }\n";
- $r .= "} \n";
- $r .= " //]]> \n" ;
- $r .= "</script>\n";
- $r .= "<a id=\"displayText\" href=\"javascript:basicltiDebugToggle();\">";
- $r .= get_string("toggle_debug_data","basiclti")."</a>\n";
- $r .= "<div id=\"basicltiDebug\" style=\"display:none\">\n";
- $r .= "<b>".get_string("basiclti_endpoint","basiclti")."</b><br/>\n";
- $r .= $endpoint . "<br/>\n <br/>\n";
- $r .= "<b>".get_string("basiclti_parameters","basiclti")."</b><br/>\n";
- foreach($newparms as $key => $value ) {
- $key = htmlspecialchars($key);
- $value = htmlspecialchars($value);
- $r .= "$key = $value<br/>\n";
- }
- $r .= " <br/>\n";
- $r .= "<p><b>".get_string("basiclti_base_string","basiclti")."</b><br/>\n".$last_base_string."</p>\n";
- $r .= "</div>\n";
- }
- $r .= "</form>\n";
- if ( $iframeattr ) {
- $r .= "<iframe name=\"basicltiLaunchFrame\" id=\"basicltiLaunchFrame\" src=\"\"\n";
- $r .= $iframeattr . ">\n<p>".get_string("frames_required","basiclti")."</p>\n</iframe>\n";
- }
- if ( ! $debug ) {
- $ext_submit = "ext_submit";
- $ext_submit_text = $submit_text;
- $r .= " <script type=\"text/javascript\"> \n" .
- " //<![CDATA[ \n" .
- " document.getElementById(\"ltiLaunchForm\").style.display = \"none\";\n" .
- " nei = document.createElement('input');\n" .
- " nei.setAttribute('type', 'hidden');\n" .
- " nei.setAttribute('name', '".$ext_submit."');\n" .
- " nei.setAttribute('value', '".$ext_submit_text."');\n" .
- " document.getElementById(\"ltiLaunchForm\").appendChild(nei);\n" .
- " document.ltiLaunchForm.submit(); \n" .
- " //]]> \n" .
- " </script> \n";
- }
- $r .= "</div>\n";
- return $r;
-}
-
-/* This is a bit of homage to Moodle's pattern of internationalisation */
-function get_string($key,$bundle) {
- return $key;
-}
-
-function do_post_request($url, $data, $optional_headers = null)
-{
- $params = array('http' => array(
- 'method' => 'POST',
- 'content' => $data
- ));
- if ($optional_headers !== null) {
- $params['http']['header'] = $optional_headers;
- }
- $ctx = stream_context_create($params);
- $fp = @fopen($url, 'rb', false, $ctx);
- if (!$fp) {
- throw new Exception("Problem with $url, $php_errormsg");
- }
- $response = @stream_get_contents($fp);
- if ($response === false) {
- throw new Exception("Problem reading data from $url, $php_errormsg");
- }
- return $response;
-}
-
projects / atutor.git / blobdiff