package com.zy.asrs.wms.utils;

import com.alibaba.fastjson.JSON;
import com.zy.asrs.framework.common.R;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * Created by vincent on 1/29/2024
 */
public class HttpUtils {

    public static void responseError(HttpServletResponse response, Integer code, String message, String error) {
        response.setContentType("application/json;charset=UTF-8");
        try {
            PrintWriter out = response.getWriter();
            out.write(JSON.toJSONString(R.parse(code + "-" + message)));
            out.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static String getClientIpAddress(HttpServletRequest request) {
        String ip = request.getHeader("X-Forwarded-For");

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }

        // 对于通过多个代理的情况，第一个IP为客户端真实IP，多个IP按照','分割
        if (ip != null && ip.contains(",")) {
            ip = ip.split(",")[0].trim();
        }
        return ip;
    }

}