Re: Images & CSS not loaded after the request passes through a Servlet Filter

["Frank W. Zammetti" <fz...@omnytex.com>]

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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Re: Images & CSS not loaded after the request passes through a Servlet Filter

[Roberto <ro...@gmail.com>]

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 <fz...@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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