package com.createdpro.api.config;

import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

/**
 * 允许跨域请求
 * @author createdpro
 */
@Component
@WebFilter(urlPatterns = "/*", filterName = "myFilter")
public class OriginFilter implements Filter {

    private static final List<String> allow = new ArrayList<>();

    static {
        // 在这里配置可以通过跨域的客户端 host 地址
        allow.add("http://localhost:8080");
        allow.add("http://localhost:8081");
        allow.add("https://createdpro.com");
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
        HttpServletRequest request = (HttpServletRequest) req;
        if (allow.contains(request.getHeader("Origin"))){
            response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
            response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT");
            response.setHeader("Access-Control-Max-Age", "3600");
            response.setHeader("Access-Control-Allow-Headers", "X-requested-with, content-type, Login-Token");
            response.setHeader("Access-Control-Allow-Credentials", "true");
        }
        chain.doFilter(req, res);
    }

    @Override
    public void destroy() {

    }

}