CORSFilter.java

package org.opencb.opencga.server;

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

/**
 * Created by pfurio on 04/10/16.
 */
public class CORSFilter implements Filter {

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

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        System.out.println("Request " + request.getMethod());

        HttpServletResponse resp = (HttpServletResponse) servletResponse;
        resp.addHeader("Access-Control-Allow-Origin","*");
        resp.addHeader("Access-Control-Allow-Methods","GET,POST");
        resp.addHeader("Access-Control-Allow-Headers","Origin, X-Requested-With, Content-Type, Accept, Range");

        // Just ACCEPT and REPLY OK if OPTIONS
        if (request.getMethod().equals("OPTIONS")) {
            resp.setStatus(HttpServletResponse.SC_OK);
            return;
        }
        chain.doFilter(request, servletResponse);
    }

    @Override
    public void destroy() {}

}