On Wed, 15 Jun 2011 07:35:14 -0300, PXZ <pragprog...@gmail.com> wrote:
hi, I'm new to Tapestry.
Welcome!
I was trying out the Vote Youtube tutorial/video,
and looks like that ActionLink doesn't seem to be safe for search
engines?
The problem with this code is that the link changes server sided database
state via a simple link click (so it's a non-idempotent request). This
means that search engines and bots will change the database when they
crawl/index the website. The positive side of this code is that it is a
safety fallback for non-javascript clients.
Your concern is correct, but IMHO this is something that should be handled
by the developer, not by the framework itself. You are responsible for
checking if the action requested can be done or not. You can check some
logic in your page or component class before doing the action itself.
Is there a way to override the href attribute to "#" so that it is safe
for search engines?
You can write a mixin or a MarkupRendererFilter for that.
Or is their another Tapestry component that is better suited for this
problem?
No. But I think EventLink should be used instead of ActionLink anyway. An
ActionLink is basically an EventLink which always trigger the 'action'
event.
--
Thiago H. de Paula Figueiredo
Independent Java, Apache Tapestry 5 and Hibernate consultant, developer,
and instructor
Owner, Ars Machina Tecnologia da Informação Ltda.
http://www.arsmachina.com.br
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