/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package Filter; import data.UserDTO; import java.io.IOException; import java.io.PrintStream; import java.io.PrintWriter; import java.io.StringWriter; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; /** * * @author thien */ public class LoginFilter implements Filter { private static final boolean debug = true; // The filter configuration object we are associated with. If // this value is null, this filter instance is not currently // configured. private FilterConfig filterConfig = null; public LoginFilter() { } private void doBeforeProcessing(ServletRequest request, ServletResponse response) throws IOException, ServletException { if (debug) { log("LoginFilter:DoBeforeProcessing"); } // Write code here to process the request and/or response before // the rest of the filter chain is invoked. // For example, a logging filter might log items on the request object, // such as the parameters. /* for (Enumeration en = request.getParameterNames(); en.hasMoreElements(); ) { String name = (String)en.nextElement(); String values[] = request.getParameterValues(name); int n = values.length; StringBuffer buf = new StringBuffer(); buf.append(name); buf.append("="); for(int i=0; i < n; i++) { buf.append(values[i]); if (i < n-1) buf.append(","); } log(buf.toString()); } */ } private void doAfterProcessing(ServletRequest request, ServletResponse response) throws IOException, ServletException { if (debug) { log("LoginFilter:DoAfterProcessing"); } // Write code here to process the request and/or response after // the rest of the filter chain is invoked. // For example, a logging filter might log the attributes on the // request object after the request has been processed. /* for (Enumeration en = request.getAttributeNames(); en.hasMoreElements(); ) { String name = (String)en.nextElement(); Object value = request.getAttribute(name); log("attribute: " + name + "=" + value.toString()); } */ // For example, a filter might append something to the response. /* PrintWriter respOut = new PrintWriter(response.getWriter()); respOut.println("

This has been appended by an intrusive filter."); */ } /** * * @param request The servlet request we are processing * @param response The servlet response we are creating * @param chain The filter chain we are processing * * @exception IOException if an input/output error occurs * @exception ServletException if a servlet error occurs */ public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { if (debug) { log("LoginFilter:doFilter()"); } doBeforeProcessing(request, response); HttpServletRequest Hrequest = (HttpServletRequest) request; HttpServletResponse Hresponse = (HttpServletResponse) response; HttpSession session = Hrequest.getSession(true); String loginURI = Hrequest.getContextPath() + "/login.jsp"; String indexURI = Hrequest.getContextPath() + "/index.jsp"; String url = Hrequest.getContextPath(); UserDTO dto = (UserDTO) session.getAttribute("USER"); if (session.getAttribute("USER") == null) { if (url.equals(loginURI)) { chain.doFilter(request, response); } else if (url.equals("/MaccaShopping/index.jsp") || url.equals(indexURI)) { chain.doFilter(request, response); } else { Hresponse.sendRedirect(loginURI); } } else { chain.doFilter(request, response); } Throwable problem = null; try { chain.doFilter(request, response); } catch (Throwable t) { // If an exception is thrown somewhere down the filter chain, // we still want to execute our after processing, and then // rethrow the problem after that. problem = t; t.printStackTrace(); } doAfterProcessing(request, response); // If there was a problem, we want to rethrow it if it is // a known type, otherwise log it. if (problem != null) { if (problem instanceof ServletException) { throw (ServletException) problem; } if (problem instanceof IOException) { throw (IOException) problem; } sendProcessingError(problem, response); } } /** * Return the filter configuration object for this filter. */ public FilterConfig getFilterConfig() { return (this.filterConfig); } /** * Set the filter configuration object for this filter. * * @param filterConfig The filter configuration object */ public void setFilterConfig(FilterConfig filterConfig) { this.filterConfig = filterConfig; } /** * Destroy method for this filter */ public void destroy() { } /** * Init method for this filter */ public void init(FilterConfig filterConfig) { this.filterConfig = filterConfig; if (filterConfig != null) { if (debug) { log("LoginFilter:Initializing filter"); } } } /** * Return a String representation of this object. */ @Override public String toString() { if (filterConfig == null) { return ("LoginFilter()"); } StringBuffer sb = new StringBuffer("LoginFilter("); sb.append(filterConfig); sb.append(")"); return (sb.toString()); } private void sendProcessingError(Throwable t, ServletResponse response) { String stackTrace = getStackTrace(t); if (stackTrace != null && !stackTrace.equals("")) { try { response.setContentType("text/html"); PrintStream ps = new PrintStream(response.getOutputStream()); PrintWriter pw = new PrintWriter(ps); pw.print("\n

The resource did not process correctly

\n");
                pw.print(stackTrace);
                pw.print("