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From Roberto <robert...@gmail.com>
Subject Re: Images & CSS not loaded after the request passes through a Servlet Filter
Date Thu, 28 Apr 2005 18:04:55 GMT
Frank,

You got it. The filter configuration, in the web.xml file, was
intercepting ALL requests (<url-pattern>/*</url-pattern>). I really
thought that the filter would intercept only requests for Servlets,
not all HTTP requests...

Thanks ! This problem was really pissing me off... :)

Regards
Roberto

On 4/28/05, Frank W. Zammetti <fzlists@omnytex.com> wrote:
> 
> Question: are the requests for images and CSS files also going through the
> filter? I'm wondering if those requests are getting forarded to the logon
> page too, which obviously wouldn't work.
> 
> --
> Frank W. Zammetti
> Founder and Chief Software Architect
> Omnytex Technologies
> http://www.omnytex.com
> 
> On Thu, April 28, 2005 1:25 pm, Roberto said:
> > Hi,
> >
> > I have a small java application, in which a servlet processes the 
> request
> > and then
> > calls a JSP to present the data. Everything is OK with that 
> configuration.
> > Then, I decided
> > to create a servlet filter, to redirect every request to that 
> application,
> > to a login page first.
> >
> > The code of that filter is the following:
> >
> > ******************************
> > public final class ApplicationFilter implements Filter {
> > private FilterConfig _fc = null;
> >
> > public void init(FilterConfig filterConfig)
> > throws ServletException {
> > this._fc = filterConfig;
> > }
> >
> > public void doFilter(ServletRequest request,
> > ServletResponse response,
> > FilterChain chain)
> > throws IOException,
> > ServletException {
> >
> > try {
> > RequestDispatcher rd =
> > _fc.getServletContext().getRequestDispatcher("/login");
> > rd.forward(request, response);
> > } catch (Exception e) {
> > System.out.println("Exception: " + e.getMessage());
> > e.printStackTrace();
> > }
> > }
> >
> > -- (the rest was intentionally omitted) --
> > *******************************************
> >
> >
> > The redirection works great, BUT all images and CSS referenced in the 
> JSP
> > file are not
> > loaded after the request passes through the filter. The application runs
> > perfectly, and takes
> > the user to the login screen, and after that, to the application. The
> > application does some
> > database queries and returns the data correctly. BUT, everything without
> > images or the
> > styles defined in the CSS file.
> >
> > Just to make a test, I put the CSS file contents directly inside the JSP
> > file, and it
> > worked great. In this case, images were not loaded also...
> >
> > The process flows like this:
> >
> > Request --> Filter --> login (a servlet) --> login.jsp --> queryDB (a
> > servlet) --> queryDB.jsp
> >
> > When I disable the filter, in the web.xml file, everything works as 
> would
> > be
> > expected.
> >
> > The configuration in web.xml is OK: all servlets are set, as is the 
> filter
> > itself.
> >
> > I'm using Tomcat 5.0.28 on a Gentoo Linux system, with POSIX threads and
> > kernel
> > 2.6.9. The hardware is a P IV HT 3.2 Ghz.
> >
> > I also checked the archives of this list, but was unable to find any
> > reference to a problem
> > like this one. Does anyone know what is happening ?
> >
> > Regards,
> > Roberto
> >
> 
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