October 2002
Intermediate to advanced
318 pages
8h 40m
English
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Chapter 3. Special Components: Dhandlers and Autohandlers
In previous chapters you’ve seen an overview of the basic structure and syntax of Mason components, and you’ve seen how components can cooperate by invoking one another and passing arguments.
In this chapter you’ll learn about dhandlers and autohandlers, two powerful mechanisms that help lend reusable structure to your site and help you design creative solutions to unique problems. Mason’s dhandlers provide a flexible way to create “virtual” URLs that don’t correspond directly to components on disk, and autohandlers let you easily control many structural aspects of your site with a powerful object-oriented metaphor.
Dhandlers
The term "dhandler”
stands for “default handler.” The
concept is simple: if Mason is asked to process a certain component
but that component does not exist in the component tree, Mason will
look for a component called dhandler
and serve that instead of the requested component. Mason looks for
dhandlers in the apparent requested directory and all parent
directories. For instance, if your web server receives a request for
/archives/2001/March/21 and passes that request
to Mason, but no such Mason component exists, Mason will sequentially
look for /archives/2001/March/dhandler,
/archives/2001/dhandler,
/archives/dhandler, and
/dhandler. If any of these components exist, the search will terminate and Mason will serve the first dhandler it finds, making the remainder of the requested component path available ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.