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-rw-r--r--doc/todo/pingback_support.mdwn3
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/todo/pingback_support.mdwn b/doc/todo/pingback_support.mdwn
index 3a7b5a931..b10366bda 100644
--- a/doc/todo/pingback_support.mdwn
+++ b/doc/todo/pingback_support.mdwn
@@ -28,6 +28,9 @@ case I will consider this done with an entry in [[tips]]; otherwise a
> would be subject to the usual comment filtering (ie, blogspam) and
> moderation and would then show up amoung the other, regular comments on
> the page.
+>
+> (One wrinkle: would need to guard against duplicate pings. Maybe by
+> checking existing comments for any that have the same url?)
>
> As for sending trackbacks and pingbacks, this could fairly easily be
> implemented using a `editcontent` hook. Since this hook is called