Re: Filter for logging request content?

roland ist ein sekt!


Am Thu, 27 Mar 2003 16:29:25 +0100 hat Guido Casper <[email protected]>
geschrieben:

> 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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