Can i edit a servlet request at the front controller level and disptach it to real url?
I need the way(maybe a class) to edit the request parameters;
request.getContextPath();
request.getRequestURL();
request.getPathInfo();
request.getServletPath();
i need the equvilance of these methods which are built to SET.
is it possible?
thank you
> which are built to SET
Servlet filter could use HttpServletRequestWrapper for such purpose.
thanks for the reply. I have looked at RequestWrapper class but really couldnt find the solution that i want.
I only need to reset the value which request.getServletPath() returns. Is it possible to do this with RequestWrapper?
1) Write a subclass of the HttpServletRequestWrapper class and overide your required methods.
2)In the doFilter() method of your filter, call chain.doFilter() method giving your wrapped request object as an argument.
--That's it.
Go to the servlet forum: http://forum.java.sun.com/forum.jspa?forumID=33 and do search with RequestWrapper. Then you will find some nifty examples for tampering the request.
> 1) Write a subclass of the HttpServletRequestWrapper
> class and overide your required methods.
http://forum.java.sun.com/thread.jspa?threadID=682565&tstart=100
I have used the wrapper in that forum but this is just for to set some Parameter to the request. But there is no method like setServletPath on the wrapper class? it is still missing and i need an HELP plz about how to override ServletPath on the request object.
> 2)In the doFilter() method of your filter, call
> chain.doFilter() method giving your wrapped request
> object as an argument.
I did it
public void doFilter(ServletRequest req,ServletResponse res,FilterChain chain)throws IOException,ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpRequestWithModifiableParameters myReq= new HttpRequestWithModifiableParameters(request);
request=(HttpServletRequest)myReq;
HttpServletResponse response=(HttpServletResponse)res;
chain.doFilter( request, response );
}
please help about just only how to override ServletPath on request object!!
thank you
> there is no method like setServletPath
I said override your required methods. The request class doesn't have setXxx() methods. You should override getServletPath() method on the wrapper.
> chain.doFilter( request, response )
Simply do:
req = new MyWrapper(req);
chain.doFilter(req, res); //don't write awkward spaces
Your 'request' and 'myReq' are also awkwardly redundant.
