package com.code2roc.fastface.filter;

import com.alibaba.fastjson.JSON;
import org.springframework.core.Ordered;

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

public class CORSFilter implements Filter, Ordered {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        if (((HttpServletRequest) request).getMethod().equals("OPTIONS")) {
            HttpServletResponse res = (HttpServletResponse) response;
            res.addHeader("Access-Control-Allow-Origin", "*");
            res.addHeader("Access-Control-Allow-Methods", "GET,POST");
            res.addHeader("Access-Control-Allow-Headers", "*");
            res.getWriter().println("ok");
            return;
        }
        HttpServletResponse res = (HttpServletResponse) response;
        res.addHeader("Access-Control-Allow-Origin", "*");
        res.addHeader("Access-Control-Allow-Methods", "GET,POST");
        res.addHeader("Access-Control-Allow-Headers", "*");
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {

    }

    @Override
    public int getOrder() {
        return Ordered.HIGHEST_PRECEDENCE;
    }
}