package com.sec.xinhua.gateway.web;

import com.sec.xinhua.gateway.config.ConfigRepositoryFactory;
import com.sec.xinhua.gateway.handler.DefaultApiHandlerChain;
import com.sec.xinhua.gateway.handler.RequestHandler;
import com.sec.xinhua.gateway.service.DubboServiceManager;
import com.sec.xinhua.gateway.utils.SysConstants;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 风控网关http入口
 *
 * @author zhangqx
 * @version $Id: GatewayServlet.java, v 0.1 2015年12月8日 下午5:48:20 zhangqx Exp $
 */
public class GatewayServlet extends HttpServlet {
    /**  */
    private static final long serialVersionUID = -2466227266582283749L;

    @Override
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
        //初始化配置(dubbo注册中心等)，很重要
        ConfigRepositoryFactory.initGatewaySetting();

        //初始化所有(dubbo的映射关系)setting
        DubboServiceManager.initAllDubboService();

        //初始化handler(filter时需要串行执行的handler,包括参数转化，泛化调用)
        DefaultApiHandlerChain.getInstance();
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse response) throws ServletException, IOException {
        //编码设置
        req.setCharacterEncoding(SysConstants.ENCODE);
        response.setContentType("application/json;charset=utf-8");
        response.setCharacterEncoding(SysConstants.ENCODE);
        response.setHeader("Access-Control-Allow-Origin", "*");
        RequestHandler requestHandler = new RequestHandler();
        String addr = req.getRemoteAddr();

        /**
         *  ip白名单功能
         */
//        if (StringUtils.isNotBlank(addr)) {
//            IpFileCache ipFileCache = IpFileCache.getInstance();
//            List<String> ips = ipFileCache.getIps();
//            if (ips == null || !ips.contains(addr)) {
//                print(response, "您好，您的ip无访问权限！");
//                return;
//            }
//        }
        requestHandler.httpRequestHandle(req, response);
    }

    private void print(HttpServletResponse response, String content) {
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "GET,PUT,DELETE,POST,OPTIONS");
        response.setHeader("Access-Control-Allow-Headers", "Origin,X-Requested-With,Content-Type,Accept,kopds");
        try {
            response.getWriter().print(content);
            response.getWriter().flush();
        } catch (IOException e) {
        }
    }
}