[racket] Explicitly rerouting web-server requests to filesystem server

From: Jay McCarthy (jay.mccarthy at gmail.com)
Date: Mon May 6 08:53:03 EDT 2013

On Sun, May 5, 2013 at 1:12 AM, Matthew Butterick
<mb.list.acct at gmail.com> wrote:
> The docs for web-server/dispatch allude to the filesystem server that lurks
> behind the dispatch rules to handle requests that are not handled by
> dispatch rules.
> Is there a way to explicitly send a request to the filesystem server?
> For instance, I have a dispatch route that checks if the requested file
> exists, and if not, generates it immediately and saves it to disk. However,
> at that point, I'd prefer to take the original request and pass it to the
> filesystem server.

The default dispatcher chain puts the filesystem server directly after
the servlet handler and then the "file not found" handler is after
that. If you ever want to have a dispatcher skip to the next one, you
can call (next-dispatcher), even if you've done work like creating a
file. Alternatively, you could explicitly call the file server by
embedding it into your servlet, but I don't recommend that.


Jay McCarthy <jay at cs.byu.edu>
Assistant Professor / Brigham Young University

"The glory of God is Intelligence" - D&C 93

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