be.dnsbelgium.rdap.servlet.LoggerFilter.java Source code

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Here is the source code for be.dnsbelgium.rdap.servlet.LoggerFilter.java

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/**
 * Copyright 2014 DNS Belgium vzw
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package be.dnsbelgium.rdap.servlet;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.core.context.SecurityContextHolder;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
import java.io.IOException;

public class LoggerFilter implements Filter {

    public static class StatusExposingServletResponse extends HttpServletResponseWrapper {

        private int httpStatus = SC_OK;

        public StatusExposingServletResponse(HttpServletResponse response) {
            super(response);
        }

        @Override
        public void sendError(int sc) throws IOException {
            httpStatus = sc;
            super.sendError(sc);
        }

        @Override
        public void sendError(int sc, String msg) throws IOException {
            httpStatus = sc;
            super.sendError(sc, msg);
        }

        @Override
        public void setStatus(int sc) {
            httpStatus = sc;
            super.setStatus(sc);
        }

        @Override
        public void sendRedirect(String location) throws IOException {
            httpStatus = SC_MOVED_TEMPORARILY;
            super.sendRedirect(location);
        }

        public int getStatus() {
            return httpStatus;
        }

    }

    private static final Logger LOGGER = LoggerFactory.getLogger(LoggerFilter.class);

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        StatusExposingServletResponse response = new StatusExposingServletResponse(
                (HttpServletResponse) servletResponse);
        try {
            chain.doFilter(servletRequest, response);
        } finally {
            String currentUser = null;
            try {
                currentUser = SecurityContextHolder.getContext().getAuthentication().getName();
            } catch (NullPointerException npe) {
                LOGGER.debug("No SecurityContext", npe);
            }
            LOGGER.info("{} {} {} {}", request.getRemoteAddr(), currentUser, request.getServletPath(),
                    response.getStatus());
        }
    }

    @Override
    public void destroy() {

    }
}