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package cn.com.wapps;
import cn.com.manager.CurrentUser;
import cn.com.national.CurrentNationalLanguange;
import cn.com.national.Language;
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;
/**
*
* @author kete
*/
public class DispatcherFilter implements Filter {
private static final boolean debug = false;
// 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 DispatcherFilter() {
}
/**
*
* @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
*/
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException {
if (debug) {
log("DispatcherFilter:doFilter()");
}
CurrentUser.setUserId((String) ((HttpServletRequest) request).getSession(false).getAttribute(CurrentUser._SESSION));
String locale = request.getParameter("locale");
if (locale != null && !locale.isEmpty()) {
((HttpServletRequest) request).getSession(false).setAttribute("locale", locale);
} else {
locale = (String) ((HttpServletRequest) request).getSession(false).getAttribute("locale");
}
if (locale != null && !locale.isEmpty()) {
CurrentNationalLanguange.setLanguage(new Language(locale));
}
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();
}
// 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
*/
@Override
public void destroy() {
}
/**
* Init method for this filter
*/
@Override
public void init(FilterConfig filterConfig) {
this.filterConfig = filterConfig;
if (filterConfig != null) {
if (debug) {
log("DispatcherFilter: Initializing filter");
}
}
}
/**
* Return a String representation of this object.
*/
@Override
public String toString() {
if (filterConfig == null) {
return ("DispatcherFilter()");
}
StringBuffer sb = new StringBuffer("DispatcherFilter(");
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);
}
}