A filter will only work with servlet containers implementing servlet specifications 2.3.
We have a general filter which is extended by other filters doing various actions like xml processing,session validations and security logic.
Here is the generic filter code.
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.IOException;
import javax.servlet.ServletException;
import pims.util.Logger;
public class PimsGenericFilter implements Filter
{
private FilterConfig filterConfig;
public void init(FilterConfig config)
{
filterConfig = config;
}
public FilterConfig getFilterConfig()
{
return filterConfig;
}
public void setFilterConfig(FilterConfig filterconfig)
{
filterConfig = filterconfig;
}
public void doFilter(final ServletRequest request,final ServletResponse response, FilterChain chain)
throws IOException, ServletException
{
chain.doFilter(request,response);
}
public void destroy()
{
filterConfig = null;
}
}
Brati Sankar Ghosh
Tata Consultancy Services
Mailto: [EMAIL PROTECTED]
Website: http://www.tcs.com
| "Shilpa Vaidya"
<[EMAIL PROTECTED]>
06/03/2004 06:06 PM
|
|
Thanks brati,
r u writing a servlet filter .
how did u approach it.
can u show me a starting point.
shilpa
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 03, 2004 5:59 PM
To: Struts Users Mailing List
Cc: 'Struts Users Mailing List'
Subject: Re: Servlet filter
Shilpa,
We are doing just that. A filter comes into effect before the control goes
to the servlet. So if you can stop the user at the filter level you are
actually saving some processing. We are checking for the presence of session
in the filter.
Brati Sankar Ghosh
Tata Consultancy Services
Mailto: [EMAIL PROTECTED]
Website: http://www.tcs.com
"Shilpa Vaidya" <[EMAIL PROTECTED]>
06/03/2004 03:41 PM
Please respond to
"Struts Users Mailing List" <[EMAIL PROTECTED]>
To "'Struts Users Mailing List'" <[EMAIL PROTECTED]>
cc
Subject Servlet filter
hey all,
Preventing users from accesing action. I am writing a web app to manage
administrators and profiles.
Administrators may access to the web app based on the profiles they have.
The profiles, determine which pages the administrator might access. The
profiles, and authorizations, might change online during work, so I need
to
check authorization to access a page (Action) on each access.If I
understand
correct, then, the actionServlet, first process the form bean, and then
the
action..
But, if the user is not authorized to access a specific page (Action), I
need to forward him to an UnAuthorized error page, before thr formAction
bean is filled.
I would like to use a servlet filter. This filter checks the users rights
and instanciates a HttpServletRequest-Wrapper.But am not sure how - .Can
anyone help.Till then me trying to study the ServletFilter examples here n
there.
Shilpa
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