CorsFilter.java

package org.dicadeveloper.weplantaforest;

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.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;

import lombok.NonNull;

@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
class CorsFilter implements Filter {
    
    @Autowired
    private @NonNull Environment _env;

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;

        response.setHeader("Access-Control-Allow-Origin", _env.getProperty("ipat.host"));
        response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Allow-Headers", "X-AUTH-TOKEN, Content-Type");
        response.setHeader("Access-Control-Expose-Headers", "X-AUTH-TOKEN");
        response.setHeader("Access-Control-Max-Age", "3600");

        chain.doFilter(req, res);
    }

    @Override
    public void init(FilterConfig filterConfig) {
    }

    @Override
    public void destroy() {
    }

}