Merge branch 'MDL-64152-401' of https://github.com/snake/moodle into MOODLE_401_STABLE

lib/ltiprovider/readme_moodle.txt

@@ -19,6 +19,9 @@ LTI-Tool-Provider-Library-PHP repo has been archived so it doesn't accept pull r
 * MDL-71920: Migrated from curl_exec and friends to use our Moodle curl wrapper,
 so we can better handle site security settings
 
+This local change has been made without the accompanying pull request as the upstream library is archived:
+* $FULLME is used as the URL for OAuth, to fix reverse proxy support (see MDL-64152)
+
 It is recommended by upstream to install depdencies via composer - but the composer installation is bundled
 with an autoloader so it's better to do it manually.
 

lib/ltiprovider/src/OAuth/OAuthRequest.php

@@ -34,14 +34,8 @@ class OAuthRequest {
      */
     public static function from_request($http_method = null, $http_url = null, $parameters = null) {
 
-      $scheme = (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != "on")
-                ? 'http'
-                : 'https';
-      $http_url = ($http_url) ? $http_url : $scheme .
-                                '://' . $_SERVER['SERVER_NAME'] .
-                                ':' .
-                                $_SERVER['SERVER_PORT'] .
-                                $_SERVER['REQUEST_URI'];
+      global $FULLME;
+      $http_url = $http_url ?: $FULLME;
       $http_method = ($http_method) ? $http_method : $_SERVER['REQUEST_METHOD'];
 
       // We weren't handed any parameters, so let's find the ones relevant to