Custom PL/SQL servlet for HTTP Listener like HTMLDB

Question

We would like to migrate our applications from apache that use a custom perl application server to the xdb http listener and would need to be able to write a custom pl/sql servlet for the listener
eg
<servlet xmlns="http://xmlns.oracle.com/xdb/xdbconfig.xsd">
<servlet-name>Custom</servlet-name>
<servlet-language>PL/SQL</servlet-language>
Can this be done? (Well obviously, HTMLDB did it.)
Is information available to do this?
Information on the request (url/headers/content) and response (headers/content) objects
of the http listener would be needed.
Our pl/sql applications look like
create package my_app as
procedure my_job (request xmltype);
end;
This is why we need to do the servlet ourselves and why dbms_epg is not suitable.

Answer 1

Currently
we don't plan to allow large input to be passed as a
CLOB parameter to the procedure. Is there a use-case
for this?YES ;). I have seen this coming up quite a few times in this forum.
1) we cannot edit sql scripts in Apex directly (>32KB), this is quite inconvenient to download, edit and upload again. If we are talking about sql scripts, they are often larger than 32KB.
2) building an application where the user can directly edit or copy/paste spreadsheet data or xml data. It is quite a restriction to only have 32KB at your hand.
3) the common workaround would be to split the data in 32KB chunks and then reassemble them in the backend. Quite tedious.
4) editing larger HTML texts for a portal application for example.
5) editing larger HTML texts for a forum application for example.
... the list goes on ...
Another argument is that all other major technologies like servlets, jsps, perl, php, python they are all capable of handling this kind of data. I often feel it is too much of a restriction.
What do others in the forum think? Feedback is welcome!!!
Thanks,
~Dietmar.