// Created by Sam Lee on 2016-08-22
package com.emo.product.config;

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

import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Service;

@Service
public class SimpleCORSFilter implements Filter {
	
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
		
		HttpServletResponse response = (HttpServletResponse) res;
		HttpServletRequest request = (HttpServletRequest) req;
		
		response.setHeader("Access-Control-Allow-Origin", "*");
		response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
		response.setHeader("Access-Control-Max-Age", "3600");
		response.setHeader("Access-Control-Allow-Headers", "Origin,Accept,X-Requested-With,Content-Type,Access-Control-Request-Method,Access-Control-Request-Headers,Authorization");
		response.setHeader("Access-Control-Allow-Credentials", "true");
		if(request.getMethod().equals(HttpMethod.OPTIONS.name())){
			response.setStatus(HttpStatus.NO_CONTENT.value());
		}else{
			chain.doFilter(req, res);
		}
	}

	public void init(FilterConfig filterConfig) {}

	public void destroy() {}

}