diff --git a/h5p-default-storage.class.php b/h5p-default-storage.class.php
index 5b8ffeb..9f11f1c 100644
--- a/h5p-default-storage.class.php
+++ b/h5p-default-storage.class.php
@@ -247,6 +247,16 @@ class H5PDefaultStorage implements \H5PFileStorage {
     }
   }
 
+  /**
+   * Read file content of given file and then return it.
+   *
+   * @param string $file_path
+   * @return string
+   */
+  public function getContent($file_path) {
+    return file_get_contents($this->path . $file_path);
+  }
+
   /**
    * Recursive function for copying directories.
    *
diff --git a/h5p-file-storage.interface.php b/h5p-file-storage.interface.php
index dfaa67a..b75625e 100644
--- a/h5p-file-storage.interface.php
+++ b/h5p-file-storage.interface.php
@@ -117,4 +117,12 @@ interface H5PFileStorage {
    *   The hash keys of removed files
    */
   public function deleteCachedAssets($keys);
+
+  /**
+   * Read file content of given file and then return it.
+   *
+   * @param string $file_path
+   * @return string contents
+   */
+  public function getContent($file_path);
 }
diff --git a/h5p.classes.php b/h5p.classes.php
index f9655a3..93c4213 100644
--- a/h5p.classes.php
+++ b/h5p.classes.php
@@ -2470,7 +2470,7 @@ class H5PCore {
     // Determine remote/visitor origin
     if ($type === 'network' ||
         ($type === 'local' && !preg_match('/^localhost$|^127(?:\.[0-9]+){0,2}\.[0-9]+$|^(?:0*\:)*?:?0*1$/i', $_SERVER['REMOTE_ADDR']))) {
-      if (filter_var($_SERVER['REMOTE_ADDR'], FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE)) {
+      if (isset($_SERVER['REMOTE_ADDR']) && filter_var($_SERVER['REMOTE_ADDR'], FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE)) {
         // Internet
         $this->h5pF->setOption('site_type', 'internet');
       }