package com.tykj.dev.device.user.config;

import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @Author zjm
 * @create 2020/3/11 10:53
 */
@Component
@WebFilter(filterName = "MyCorsFilter", urlPatterns = "/*")
@Order(2)
public class PasCorsFilter implements Filter {
    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;

        // 设置响应头的权限信息 request.getHeader("Origin")
        response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, PATCH, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        //original headers Origin, X-Requested-With, Content-Type, Accept
        response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
        chain.doFilter(req, res);
    }

    @Override
    public void init(FilterConfig config) {
    }

    @Override
    public void destroy() {
    }

}
