package com.imooc.shoptest001.aspect;

import org.aspectj.lang.JoinPoint;

import org.aspectj.lang.annotation.*;

import org.springframework.stereotype.Component;

import org.springframework.web.context.request.RequestContextHolder;

import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**

 *  刘运通

 *  20190324

 *  作用实现拦截http请求.

 */

@Aspect

@Component //把这个文件引入到Spring容器里面去.

public class HttpAspect {

    @Pointcut("execution(public * com.imooc.shoptest001.controller.UserController.*(..))")

    public void log(){

    }

    /**

     * 拦截那些方法.请求前.

     * JoinPoint 获取类方法和类名对象.

     */

    @Before("log()")

    public void logBefore(JoinPoint joinPoint){

        System.out.println("拦截了getInfo方法");

        //url,method,ip,类方法,参数.

        //SpringBoot通过RequestContextHolder获取HttpRequest和HttpResponse

        ServletRequestAttributes attributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();

        //javax.servlet.http.HttpServletRequest

        HttpServletRequest request = attributes.getRequest();

        System.out.println("url"+request.getRequestURL());

        System.out.println("method"+request.getMethod());

        System.out.println("ip"+request.getRemoteAddr());

        //类方法.

        System.out.println("类方法"+joinPoint.getSignature().getDeclaringTypeName()

                +"."+ joinPoint.getSignature().getName()

        );

        //参数:

        System.out.println("类方法"+joinPoint.getArgs());

    }

    /**

     * 拦截那些方法.请求后.

     */

    @After("log()")

    public void logAfter(){

        System.out.println("拦截了getInfo方法.之后");

    }

    /**

     * 返回参数.

     * @param object 入参

     */

    @AfterReturning(returning = "object",pointcut = "log()")

    public void doAfterReturning(Object object){

        System.out.println(object);

    }

}