package ch.qos.logback.classic.helpers;
import java.io.IOException;
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 org.slf4j.MDC;
import ch.qos.logback.classic.ClassicConstants;
public class MDCInsertingServletFilter implements Filter {
public void destroy() {
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
insertIntoMDC(request);
try {
chain.doFilter(request, response);
} finally {
clearMDC();
}
}
void insertIntoMDC(ServletRequest request) {
MDC.put(ClassicConstants.REQUEST_REMOTE_HOST_MDC_KEY, request.getRemoteHost());
if (request instanceof HttpServletRequest) {
HttpServletRequest httpServletRequest = (HttpServletRequest) request;
MDC.put(ClassicConstants.REQUEST_REQUEST_URI, httpServletRequest.getRequestURI());
StringBuffer requestURL = httpServletRequest.getRequestURL();
if (requestURL != null) {
MDC.put(ClassicConstants.REQUEST_REQUEST_URL, requestURL.toString());
}
MDC.put(ClassicConstants.REQUEST_METHOD, httpServletRequest.getMethod());
MDC.put(ClassicConstants.REQUEST_QUERY_STRING, httpServletRequest.getQueryString());
MDC.put(ClassicConstants.REQUEST_USER_AGENT_MDC_KEY, httpServletRequest.getHeader("User-Agent"));
MDC.put(ClassicConstants.REQUEST_X_FORWARDED_FOR, httpServletRequest.getHeader("X-Forwarded-For"));
}
}
void clearMDC() {
MDC.remove(ClassicConstants.REQUEST_REMOTE_HOST_MDC_KEY);
MDC.remove(ClassicConstants.REQUEST_REQUEST_URI);
MDC.remove(ClassicConstants.REQUEST_QUERY_STRING);
MDC.remove(ClassicConstants.REQUEST_REQUEST_URL);
MDC.remove(ClassicConstants.REQUEST_METHOD);
MDC.remove(ClassicConstants.REQUEST_USER_AGENT_MDC_KEY);
MDC.remove(ClassicConstants.REQUEST_X_FORWARDED_FOR);
}
public void init(FilterConfig arg0) throws ServletException {
}
}