bundles/org.apache.jasper.glassfish/src/org/apache/jasper/runtime/JspRuntimeLibrary.java
public static String getContextRelativePath(ServletRequest request,
                                                String relativePath) {

        if (relativePath.startsWith("/"))
            return (relativePath);
        if (!(request instanceof HttpServletRequest))
            return (relativePath);
        HttpServletRequest hrequest = (HttpServletRequest) request;
        String uri = (String)
            request.getAttribute("javax.servlet.include.servlet_path");
        if (uri != null) {
            String pathInfo = (String)
                request.getAttribute("javax.servlet.include.path_info");
            if (pathInfo == null) {
                if (uri.lastIndexOf('/') >= 0) {
                    uri = uri.substring(0, uri.lastIndexOf('/'));
                }
            }
        }
        else {
            // STARTJR: fix improper handling of jsp:include
            uri = hrequest.getServletPath();
            String pathInfo = hrequest.getPathInfo ();
            if ( pathInfo != null) {
                uri = uri + pathInfo;
            }
            if (uri.lastIndexOf('/') >= 0) {
                uri = uri.substring(0, uri.lastIndexOf('/'));
            }
            // ENDJR
        }
        return uri + '/' + relativePath;

    }
public static String getContextRelativePath(ServletRequest request,
                                                String relativePath) {

        if (relativePath.startsWith("/"))
            return (relativePath);
        if (!(request instanceof HttpServletRequest))
            return (relativePath);
        HttpServletRequest hrequest = (HttpServletRequest) request;
        String uri = (String)
            request.getAttribute("javax.servlet.include.servlet_path");
        if (uri != null) {
            String pathInfo = (String)
                request.getAttribute("javax.servlet.include.path_info");
            if (pathInfo == null) {
                if (uri.lastIndexOf('/') >= 0) {
                    uri = uri.substring(0, uri.lastIndexOf('/'));
                }
            }
        }
        else {
            // STARTJR: fix improper handling of jsp:include
            uri = hrequest.getServletPath();
            String pathInfo = hrequest.getPathInfo ();
            if ( pathInfo != null) {
                uri = uri + pathInfo;
            }
            if (uri.lastIndexOf('/') >= 0) {
                uri = uri.substring(0, uri.lastIndexOf('/'));
            }
            // ENDJR
        }
        return uri + '/' + relativePath;

    }
Convert a possibly relative resource path into a context-relative
resource path that starts with a '/'.

@param request The servlet request we are processing
@param relativePath The possibly relative resource path