package com.welampiot.interceptor;

import com.alibaba.fastjson.JSON;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.ws.RequestWrapper;
import java.util.Map;

public class Interceptor implements HandlerInterceptor {
    /**
     * 在请求处理之前进行调用（Controller方法调用之前）
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {

        // 记录请求参数日志
        if(request.getRequestURI().substring(0,4).equals("/api")){
            Logger paramLog =  LoggerFactory.getLogger("param_log");
            Map<String, String[]> parameterMap = request.getParameterMap();
            paramLog.info(request.getRequestURI()+" ==request param== "+ JSON.toJSONString(parameterMap));
        }
        return true;//如果设置为false时，被请求时，拦截器执行到此处将不会继续操作
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
        ServletOutputStream outputStream = response.getOutputStream();
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        byte[] content = new byte[1024];
        //获取response的值
//        String responseData = IOUtils.toString(content, "UTF-8");

        System.out.println(content.toString());
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}