response

doc/todo/__42__forward__42__ing_functionality_for_the_meta_plugin.mdwn

@@ -48,3 +48,21 @@ the forwarding statement also to the referred-to page.
 >> What is a *cyclic meta refresh loop*?  Two pages in turn forwarding to each other?
 >> I think it would be possible to implement such a guard when only in-wiki links
 >> ([[wikilink]]s) are being used, but how to do so for external links?  --[[tschwinge]]
+
+>>> This seems a lot more securely to do for in-wiki links, since we know
+>>> that a link generated by a wikilink is safe, and can avoid cycles.
+>>> Obviously there's no way to avoid cycles when using external links.
+>>> 
+>>> An example of code that doesn't detect such cycles is LWP::UserAgent,
+>>> which will happily follow cycles forever. There's a LWPx::ParanoidAgent
+>>> that can deal with cycles. I suppose this could be considered a client
+>>> side issue, except that if I were going to turn this redirect feature
+>>> on in my wikis, I'd really prefer to not have to worry about my wiki
+>>> causing such problems for clients. I feel it makes sense to make
+>>> external redirects or other potentially unsafe things an option,
+>>> and have the default behavior be only things that are known to be
+>>> secure.
+>>>
+>>> I haven't checked if there's a way to embed javascript in meta refresh
+>>> links or not. Given all the other places I've seen it be embedded, I'll
+>>> assume it is possible until it's shown not to be though.. --[[Joey]]