File server servlet

Question

Hi all,
I'm writing a servlet which has to serve images/picture's. For instance emoticons.
I found the excellent help from [BalusC : FileServlet|http://balusc.blogspot.com/2007/07/fileservlet.html] The servlet itself works fine (Thank you BalusC)
However it only servers the images from :
$CATALINA_HOME/bin
So if I ask for (for instance) http://localhost:8080/socnet/icons/cool_icon.gif it works only if $CATALINA_HOME/bin/icons/icon_cool.gif
What I want is that this picture is served from the deployed application ($CATALINA_HOME/webapps/socnet/icons/icon_cool.gif)
I can't seem to find how to accomplish this.
So if anyone has any pointers...shoot
Best Regards
maboc

Answer 1

Just to be sure....also the code from the servlet:
public class fileserverservlet extends HttpServlet {
    private static final int DEFAULT_BUFFER_SIZE = 10240;
    private String filepath;
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        filepath = "icons";
        String requestedFile = request.getPathInfo();
        //is er daadwerkeleijk een file gevraagd?
        if (requestedFile == null) {
            response.sendError(HttpServletResponse.SC_BAD_REQUEST);
            return;
        //File f = new File(filepath, URLDecoder.decode(requestedFile, "UTF-8"));
        File f = new File("icons/icon_cool.gif");
        if (!f.exists()) {
            System.out.println(f.getAbsoluteFile());
            System.out.println(f.getAbsolutePath());
            System.out.println(f.getCanonicalFile());
            System.out.println(f.getCanonicalPath());
            System.out.println(f.getName());
            System.out.println(f.getParent());
            System.out.println(f.getParentFile());
            System.out.println(f.getPath());
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        String contenttype = getServletContext().getMimeType(f.getName());
        if (contenttype == null) {
            contenttype = "application/octet-stream";
        response.reset();
        response.setBufferSize(DEFAULT_BUFFER_SIZE);
        response.setContentType(contenttype);
        response.setHeader("Content-Length", String.valueOf(f.length()));
        response.setHeader("Content-Disposition", "attachment; filename=\"" + f.getName() + "\"");
        BufferedInputStream input = null;
        BufferedOutputStream output = null;
        try {
            // Open streams.
            input = new BufferedInputStream(new FileInputStream(f), DEFAULT_BUFFER_SIZE);
            output = new BufferedOutputStream(response.getOutputStream(), DEFAULT_BUFFER_SIZE);
            // Write file contents to response.
            byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
            int length;
            while ((length = input.read(buffer)) > 0) {
                output.write(buffer, 0, length);
        } finally {
            // Gently close streams.
            close(output);
            close(input);
    }As you can see I do some checking with a lot of logging whether the file exists.
A bit of the log file :
/home/martijn/apache-tomcat-6.0.26/bin/icons/icon_cool.gif
/home/martijn/apache-tomcat-6.0.26/bin/icons/icon_cool.gif
/home/martijn/apache-tomcat-6.0.26/bin/icons/icon_cool.gif
/home/martijn/apache-tomcat-6.0.26/bin/icons/icon_cool.gif
icon_cool.gif
icons
icons
icons/icon_cool.gif
...I don't have a clue whether the code is wrong or some tomcat startup parameter.