storm-server/src/main/java/org/apache/storm/logging/filters/AccessLoggingFilter.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The ASF licenses this file to you 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 org.apache.storm.logging.filters;

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 javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AccessLoggingFilter implements Filter {

    private static final Logger LOG = LoggerFactory.getLogger(AccessLoggingFilter.class);

    @Override
    public void init(FilterConfig config) throws ServletException {
        //NOOP
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        handle((HttpServletRequest) request, (HttpServletResponse) response, chain);
    }

    public void handle(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
        if (request != null) {
            LOG.info("Access from: {} url: {} principal: {}", request.getRemoteAddr(), request.getRequestURL(),
                     (request.getUserPrincipal() == null ? "" : request.getUserPrincipal().getName()));
        }
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
        //NOOP
    }
}