RequestWrapperFilter.java

package test

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import spark.embeddedserver.jetty.HttpRequestWrapper;

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

/**
 * Created by mcline on 2/25/20.
 * Purpose: Allow java spark multiple filters to access request body by using a wrapper object
 */
public class RequestWrapperFilter implements Filter {


    private FilterConfig filterConfig = null;
    private static final Logger logger = LoggerFactory.getLogger(RequestWrapperFilter.class);


    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {

        logger.info("Entering Filter Class");

        HttpServletRequest httpRequest = (HttpServletRequest) request; // NOSONAR
        HttpServletResponse httpResponse = (HttpServletResponse) response; // NOSONAR

        request = new HttpRequestWrapper(httpRequest);


        chain.doFilter(request, response);
    }

    public void init(FilterConfig filterConfiguration)  {
        this.filterConfig = filterConfiguration;
    }

    public void destroy() {
        this.filterConfig = null;
    }
}

web.xml

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                             http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         metadata-complete="false"
         version="3.1">

    <filter>
        <filter-name>wrapperFilter</filter-name>
        <filter-class>test.RequestWrapperFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>wrapperFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <filter>
        <filter-name>SparkFilter</filter-name>
        <filter-class>spark.servlet.SparkFilter</filter-class>
        <init-param>
            <param-name>applicationClass</param-name>
            <param-value>YourApplicationPathHere</param-value>
        </init-param>
    </filter>

    <filter-mapping>
        <filter-name>SparkFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>



</web-app>