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Copy pathUnuseFilter2.java
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250 lines (224 loc) · 7.98 KB
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/*
* 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("<P><B>This has been appended by an intrusive filter.</B>");
*/
}
/**
*
* @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("<html>\n<head>\n<title>Error</title>\n</head>\n<body>\n"); //NOI18N
// PENDING! Localize this for next official release
pw.print("<h1>The resource did not process correctly</h1>\n<pre>\n");
pw.print(stackTrace);
pw.print("</pre></body>\n</html>"); //NOI18N
pw.close();
ps.close();
response.getOutputStream().close();
} catch (Exception ex) {
}
} else {
try {
PrintStream ps = new PrintStream(response.getOutputStream());
t.printStackTrace(ps);
ps.close();
response.getOutputStream().close();
} catch (Exception ex) {
}
}
}
public static String getStackTrace(Throwable t) {
String stackTrace = null;
try {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
t.printStackTrace(pw);
pw.close();
sw.close();
stackTrace = sw.getBuffer().toString();
} catch (Exception ex) {
}
return stackTrace;
}
public void log(String msg) {
filterConfig.getServletContext().log(msg);
}
}