Re: [Qexo-general] Include, Http Post

[Per Bothner]

Terje Pedersen wrote:

> I N C L U D E
> Is there or would it be some function to include other .xql files like 
> xsl:include in xsl or include() in php?

The May XQuery draft has a module facility.  I haven't implemented it 
yet, partly because I think it is poorly conceived.  (I have reported my 
concerns to the committee,but perhaps shoudl do so again.)
> Is it possible to compile an xql program and use functions from this class 
> just like you can do with java, scm classes? I have tested using functions 
> written in a custom scm class from xql which worked on the command line but 
> for some reason I didn't get i working with tomcat ie. from a servlet.

Note sure what you're asking here.  Yes, you can compile an xql program 
to a Java class, and yes you can call Java methods from XQuery.  The 
problem is these features aren't really integrated and consistent yet. 
This is a high priority issue.

> H T T P  P O S T
> I needed atleast HTTP POST so I added the following lines to KawaServlet.java
>
>  public void doPost(HttpServletRequest request, HttpServletResponse response)
>           throws ServletException, IOException
>   {
>      doGet(request,response);
>   }

I guess we could do that, if it is needed.

> Which makes it also possible to post form data. But what I really would like 
> to have is a function returning the posted form data as xml so that I can 
> treat it just like an xml document with the possibilty to lets say join it 
> with some other xml data.
>
> <form method="post" name="vote" action="#">
>         <input type="radio" name="answer" value="true"/>yes<br/>
>         <input type="radio" name="answer" value="false"/>no<br/>
>         <input type="submit" name="button" value="Vote"/>
> </form>
> ==>
> <vote>
>         <answer>true</answer>
>         <button>Vote</button>
> </vote>

But HTTP doesn't give you that.  It gives you (some encoding of):

answer="true"
button="Vote"

These can get accessed at the Java servlet level using getParameter, 
getParameterNames, and related ServletRequest methods.

In Qexo, you can use request-parameter("answer") or 
request-parameters("answer").

We could implement:  string($param/answer) where teh string is usually 
automatic.  But there are some issues here.

> I'm not certain about the possibility to extract the form name attribute, is 
> it possible?

Not as far as I know.  The HTML 4.01 spec suggests it is for 
(client-side) scripting.

> Or maybe naming the input elements with slashes is better solution like this :
> <input name="address/name"/>
> <input name="address/postal/code"/>
> ==>
> <address>
>     <name>Terje Pedersen</name>
>     <postal>
>         <code>5563</code>
>     </postal>
> </address>

That may be possible.  But I don't know if it's compatible with XForms, 
which we may want to work towards.
--
        --Per Bothner
address@hidden   http://per.bothner.com/