[hunchentoot-devel] [patch] Invoking the debugger in Hunchentoot (was: Invoke-debugger)

[Andreas Fuchs]

On Sun, Nov 15, 2009 at 12:58, Edi Weitz <edi at agharta.de> wrote:
> Yes, I agree.  I was probably a bit too over-enthusiastic with the
> third bit... :)
>
> Still, I only have a finite amount of time.  The Hunchentoot-specific
> error handling was thrown out with the 1.0.0 release and if we add
> something similar back in, I want it to be a reasonable, working,
> flexible, and well-documented solution.  That takes time, and I'll do
> it when I have that time, this being not a priority for me right now.

I have spent the last day working on a patch (incl. documentation) to
include an error-handling mechanism in Hunchentoot, similar to the
solution Peter posted some way up the thread (which was indeed a quick
hack by me).

This patch introduces an error handling protocol for connections and
request handling. It introduces a new class and two new generic
functions (all three exported and documented):

* defclass debugging-acceptor: An acceptor that doesn't catch errors,
instead relies on the implementation's debugger hook to catch the
error and report it synchronously.

* defgeneric invoke-process-connection-with-error-handling: An error
handling mechanism for connection processing: Behavior for the regular
hunchentoot:acceptor is the current default behavior.
debuggable-acceptors only give you the debugger if their
debug-connection-errors-p slot is non-NIL (NIL is the default)

* defgeneric invoke-process-request-with-error-handling: An error
handling mechanism for request handling: As before, the default
behavior is in place for all subclasses of hunchentoot:acceptor except
for debugging-acceptor. There, it invokes the debugger for signals
raised with CL:ERROR.

I hope very much that you find this worth including in the hunchentoot
distribution. Of course, feedback is welcome. (-:

Cheers,
-- 
Andreas Fuchs, (http://|im:asf@|mailto:asf@)boinkor.net, antifuchs
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