intercept redirects and rewrite

RedirectFixFilter.java

import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.wrappers.SlingHttpServletResponseWrapper;

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.HttpServletResponse;
import java.io.IOException;

public class RedirectFixFilter implements Filter {

    private static final String PREFIX = "https://www.domain.com";

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
            throws IOException, ServletException {

        final HttpServletResponse response = new RedirectHttpServletResponse((SlingHttpServletResponse) servletResponse);
        filterChain.doFilter(servletRequest, response);
    }

    public class RedirectHttpServletResponse extends SlingHttpServletResponseWrapper {

        public RedirectHttpServletResponse(SlingHttpServletResponse wrappedResponse) {
            super(wrappedResponse);
        }

        @Override
        public void sendRedirect(final String location) throws IOException {
            if (location != null && location.startsWith(PREFIX)) {
                super.sendRedirect(location.substring(PREFIX.length()));
            } else {
                super.sendRedirect(location);
            }
        }
    }

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

    @Override
    public void destroy() {
    }


}