org.luoshu.util.web.HttpKit Maven / Gradle / Ivy

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package org.luoshu.util.web;

import org.luoshu.util.Assert;
import org.luoshu.util.json.JSON;
import org.luoshu.util.json.JsonDefine;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

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

/**
 * @author inme
 * create: 2020-04-13 21:52
 */
public class HttpKit {

    public static final Logger logger = LoggerFactory.getLogger(HttpKit.class);

    public static HttpServletRequest getRequest(){
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
        HttpServletRequest request = requestAttributes.getRequest();
        return request;
    }

    public static HttpServletResponse getResponse(){
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
        return requestAttributes.getResponse();
    }

    public static HttpSession getSession(){
        return getRequest().getSession();
    }


    /**
     * 根据 cookie 的 name 获取 cookie
     * @param cookieName cookie 的 name
     * @return 返回 cookie
     */
    public static Cookie getCookie(String cookieName){
        HttpServletRequest request = getRequest();
        return getCookie(request , cookieName);
    }

    /**
     * 根据 cookie 的 name 获取 cookie
     * @param cookieName cookie 的 name
     * @return 返回 cookie
     */
    public static Cookie getCookie(HttpServletRequest request , String cookieName){
        Assert.assertNotNull(request , "request is null");
        Assert.assertNotNull(cookieName , "cookie name is null");
        Cookie[] cookies = request.getCookies();
        if(cookies == null || cookies.length == 0){
            return null;
        }

        for (Cookie cookie : cookies) {
            String name = cookie.getName();
            if(cookieName.equals(name)){
                return cookie;
            }
        }

        return null;
    }

    /**
     * 把一个 object 对象，写入到 response 中返回
     * @param response
     * @param object
     */
    public static void write(HttpServletResponse response, Object object) {
        Assert.assertNotNull(response , "response is null");
        Assert.assertNotNull(object , "write object is null");

        response.setContentType("application/json;charset=UTF-8");
        PrintWriter writer = null;
        try {
            writer = response.getWriter();
            //把得到的数据，包装到Resuest中返回
            writer.write(JSON.toJSONString(object));
        } catch (IOException e) {
            logger.error(e.getMessage() , e);
        } finally {
//            IOUtils.close(writer);
        }
    }
}