www.pudn.com > RFID_98798798698698.rar > RequestDumperFilter.java
/*
* $Header: /cvsfile/RFID/src/com/rfid/filters/RequestDumperFilter.java,v 1.1 2006/10/29 10:27:45 Administrator Exp $
* $Revision: 1.1 $
* $Date: 2006/10/29 10:27:45 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
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* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
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* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
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* 5. Products derived from this software may not be called "Apache"
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* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* .
*
* [Additional notices, if required by prior licensing conditions]
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*/
package com.rfid.filters;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.sql.Timestamp;
import java.util.Enumeration;
import java.util.Locale;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
/**
* Example filter that dumps interesting state information about a request
* to the associated servlet context log file, before allowing the servlet
* to process the request in the usual way. This can be installed as needed
* to assist in debugging problems.
*
* @author Craig McClanahan
* @version $Revision: 1.1 $ $Date: 2006/10/29 10:27:45 $
*/
public final class RequestDumperFilter implements Filter {
// ----------------------------------------------------- Instance Variables
/**
* 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 Methods
/**
* Take this filter out of service.
*/
public void destroy() {
this.filterConfig = null;
}
/**
* Time the processing that is performed by all subsequent filters in the
* current filter stack, including the ultimately invoked servlet.
*
* @param request The servlet request we are processing
* @param result 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 (filterConfig == null)
return;
// Render the generic servlet request properties
StringWriter sw = new StringWriter();
PrintWriter writer = new PrintWriter(sw);
writer.println("Request Received at " +
(new Timestamp(System.currentTimeMillis())));
writer.println(" characterEncoding=" + request.getCharacterEncoding());
writer.println(" contentLength=" + request.getContentLength());
writer.println(" contentType=" + request.getContentType());
writer.println(" locale=" + request.getLocale());
writer.print(" locales=");
Enumeration locales = request.getLocales();
boolean first = true;
while (locales.hasMoreElements()) {
Locale locale = (Locale) locales.nextElement();
if (first)
first = false;
else
writer.print(", ");
writer.print(locale.toString());
}
writer.println();
Enumeration names = request.getParameterNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
writer.print(" parameter=" + name + "=");
String values[] = request.getParameterValues(name);
for (int i = 0; i < values.length; i++) {
if (i > 0)
writer.print(", ");
writer.print(values[i]);
}
writer.println();
}
writer.println(" protocol=" + request.getProtocol());
writer.println(" remoteAddr=" + request.getRemoteAddr());
writer.println(" remoteHost=" + request.getRemoteHost());
writer.println(" scheme=" + request.getScheme());
writer.println(" serverName=" + request.getServerName());
writer.println(" serverPort=" + request.getServerPort());
writer.println(" isSecure=" + request.isSecure());
// Render the HTTP servlet request properties
if (request instanceof HttpServletRequest) {
writer.println("---------------------------------------------");
HttpServletRequest hrequest = (HttpServletRequest) request;
writer.println(" contextPath=" + hrequest.getContextPath());
Cookie cookies[] = hrequest.getCookies();
if (cookies == null)
cookies = new Cookie[0];
for (int i = 0; i < cookies.length; i++) {
writer.println(" cookie=" + cookies[i].getName() +
"=" + cookies[i].getValue());
}
names = hrequest.getHeaderNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
String value = hrequest.getHeader(name);
writer.println(" header=" + name + "=" + value);
}
writer.println(" method=" + hrequest.getMethod());
writer.println(" pathInfo=" + hrequest.getPathInfo());
writer.println(" queryString=" + hrequest.getQueryString());
writer.println(" remoteUser=" + hrequest.getRemoteUser());
writer.println("requestedSessionId=" +
hrequest.getRequestedSessionId());
writer.println(" requestURI=" + hrequest.getRequestURI());
writer.println(" servletPath=" + hrequest.getServletPath());
}
writer.println("=============================================");
// Log the resulting string
writer.flush();
filterConfig.getServletContext().log(sw.getBuffer().toString());
// Pass control on to the next filter
chain.doFilter(request, response);
}
/**
* Place this filter into service.
*
* @param filterConfig The filter configuration object
*/
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
}
/**
* Return a String representation of this object.
*/
public String toString() {
if (filterConfig == null)
return ("RequestDumperFilter()");
StringBuffer sb = new StringBuffer("RequestDumperFilter(");
sb.append(filterConfig);
sb.append(")");
return (sb.toString());
}
}