[rygel] core: Don't allow comments in DIDL-Lite

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 35f01c47b39f9cfdae581952f414d55394026289
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed May 26 23:54:21 2010 +0300

    core: Don't allow comments in DIDL-Lite
    
    Don't allow comments in DIDL-Lite in 'Elements' argument of CreatObject.

 src/rygel/rygel-item-creator.vala |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/rygel/rygel-item-creator.vala b/src/rygel/rygel-item-creator.vala
index e656d2e..dd943c5 100644
--- a/src/rygel/rygel-item-creator.vala
+++ b/src/rygel/rygel-item-creator.vala
@@ -30,6 +30,8 @@ private errordomain Rygel.ItemCreatorError {
  * CreateObject action implementation.
  */
 internal class Rygel.ItemCreator: GLib.Object, Rygel.StateMachine {
+    private static PatternSpec comment_pattern = new PatternSpec ("*<!--*-->*");
+
     // In arguments
     public string container_id;
     public string elements;
@@ -94,6 +96,9 @@ internal class Rygel.ItemCreator: GLib.Object, Rygel.StateMachine {
         if (this.elements == null) {
             throw new ContentDirectoryError.BAD_METADATA (
                                         _("'Elements' argument missing."));
+        } else if (comment_pattern.match_string (this.elements)) {
+            throw new ContentDirectoryError.BAD_METADATA (
+                                        _("Comments not allowed in XML"));
         }
 
         if (this.container_id == null) {