CorsFilter.java

package org.transgalactica.info.rest;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

@Component
public class CorsFilter extends OncePerRequestFilter {

	@Override
	protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
			throws ServletException, IOException {
		response.setHeader("Access-Control-Allow-Origin", "*");
		if (request.getHeader("Access-Control-Request-Method") != null && "OPTIONS".equals(request.getMethod())) {
			// CORS "pre-flight" request
			response.addHeader("Access-Control-Allow-Methods", "HEAD, GET, POST, PUT, DELETE");
			response.addHeader("Access-Control-Allow-Headers",
					"Authorization, Origin, Content-Type, Accept, x-requested-with");
			response.addHeader("Access-Control-Max-Age", "3600");
		}
		chain.doFilter(request, response);
	}
}