Re: Filter for logging request content?

Partha Ranjan Das wrote:
> Why don't you use:
>
> return super.getReader();

since HttpServletRequest allows you to call getReader() only once.

>
> instead of:
>
> return new BufferedReader(new StringReader(body));
>
> I think, since the getReader() already has the handle to the body , a
> second BuffredRedaer cannot be given.
>
> Just try.
>
> REgards,
> Partha
>
>
> -----Original Message-----
> From: Guido Casper [mailto:[email protected]]
> Sent: Thursday, March 27, 2003 5:00 PM
> To: [email protected]
> Subject: Filter for logging request content?
>
>
> Hi all,
>
> I want to build a logging filter that does not only log the
> user/method/url but also the content of the request (i.e. for PUT
> requests).
>
> I easily can extract the content of the request via getReader().
> The problem is that I always get:
> java.lang.IllegalStateException: getReader() has already been called
> for this request
>
> I already tried to create a RequestWrapper (see below) but the
> getReader() method of my wrapper never gets called and I still get
> the above exception. Unfortunately I don't have access to the source
> code of the called servlet.
>
> Am I doing something wrong?
> Does anybody have a possible reason/solution?
>
> Any hint is much appreciated
>
> Guido
>
>
>
>     chain.doFilter(new BodyWrapper((HttpServletRequest)request, body),
> response);
>     // body is a String containing the body of the request
>
> }
> private class BodyWrapper extends HttpServletRequestWrapper {
>     private String body;
>     private BodyWrapper(HttpServletRequest req, String bo) {
>         super(req);
>         body = bo;
>     }
>     public BufferedReader getReader()
>     throws java.io.IOException {
>         System.out.println("BodyWrapper.getReader() called");
>         return new BufferedReader(new StringReader(body));
>     }
> }
>
>
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