十一、配置内网穿透实现消息模块和授权登陆模块

开通内网穿透的服务（后端8333，前端8080）：

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启动内网穿透服务：

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创建CourseApiController来实现关键词查询课程信息：

package com.lxl.ggkt.vod.api;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.lxl.ggkt.model.vod.Course;
import com.lxl.ggkt.result.Result;
import com.lxl.ggkt.vo.vod.CourseQueryVo;
import com.lxl.ggkt.vo.vod.CourseVo;
import com.lxl.ggkt.vod.service.CourseService;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.management.Query;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping(value = "/api/vod/course")
public class CourseApiController {

    @Autowired
    private CourseService courseService;

    //根据课程id查询课程信息
    @ApiOperation("根据ID查询课程")
    @GetMapping("inner/getById/{courseId}")
    public Course getById(
            @ApiParam(value = "课程ID", required = true)
            @PathVariable Long courseId){
        Course course = courseService.getById(courseId);
        return course;
    }

    //根据课程分类查询课程列表（分页）
    @ApiOperation("根据课程分类查询课程列表")
    @GetMapping("{subjectParentId}/{page}/{limit}")
    public Result findPageCourse(@ApiParam(value = "课程一级分类ID", required = true) @PathVariable Long subjectParentId,
                                 @ApiParam(name = "page", value = "当前页码", required = true) @PathVariable Long page,
                                 @ApiParam(name = "limit", value = "每页记录数", required = true) @PathVariable Long limit){
        
        //封装条件
        CourseQueryVo courseQueryVo = new CourseQueryVo();
        courseQueryVo.setSubjectParentId(subjectParentId);
        
        //创建page对象
        Page<Course> pageParam = new Page<>(page, limit);
        Map<String,Object> map = courseService.findPage(pageParam,courseQueryVo);
        return Result.ok(map);
    }

    //根据课程id查询课程详情
    @ApiOperation("根据课程id查询课程详情")
    @GetMapping("getInfo/{courseId}")
    public Result getInfo(@PathVariable Long courseId){
        Map<String,Object> map = courseService.getInfoById(courseId);
        return Result.ok(map);
    }

    @ApiOperation("根据关键字查询课程")
    @GetMapping("inner/findByKeyword/{keyword}")
    public List<Course> findByKeyword(
            @ApiParam(value = "关键词",required = true)
            @PathVariable String keyword){
        QueryWrapper<Course> wrapper = new QueryWrapper<>();
        wrapper.like("title",keyword);
        List<Course> list = courseService.list(wrapper);
        return list;
    }
}

公众号消息接收和相关业务模块设计：

MessageController：

package com.lxl.ggkt.wechat.controller;

import com.alibaba.fastjson.JSONObject;
import com.lxl.ggkt.result.Result;
import com.lxl.ggkt.wechat.service.MessageService;
import com.lxl.ggkt.wechat.utils.SHA1;
import me.chanjar.weixin.common.error.WxErrorException;
import me.chanjar.weixin.mp.bean.message.WxMpXmlMessage;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import java.io.InputStream;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/api/wechat/message")
public class MessageController {

    private static final String token = "ggkt";

    @Autowired
    private MessageService messageService;

    @GetMapping("/pushPayMessage")
    public Result pushPayMessage() throws WxErrorException {
        messageService.pushPayMessage(1L);
        return Result.ok(null);
    }
    
    /**
     * 服务器有效性验证
     * @param request
     * @return
     */
    @GetMapping
    public String verifyToken(HttpServletRequest request) {
        String signature = request.getParameter("signature");
        String timestamp = request.getParameter("timestamp");
        String nonce = request.getParameter("nonce");
        String echostr = request.getParameter("echostr");
        //log.info("signature: {} nonce: {} echostr: {} timestamp: {}", signature, nonce, echostr, timestamp);
        if (this.checkSignature(signature, timestamp, nonce)) {
           // log.info("token ok");
            return echostr;
        }
        return echostr;
    }

    private boolean checkSignature(String signature, String timestamp, String nonce) {
        String[] str = new String[]{token, timestamp, nonce};
        //排序
        Arrays.sort(str);
        //拼接字符串
        StringBuffer buffer = new StringBuffer();
        for (int i = 0; i < str.length; i++) {
            buffer.append(str[i]);
        }
        //进行sha1加密
        String temp = SHA1.encode(buffer.toString());
        //与微信提供的signature进行匹对
        return signature.equals(temp);
    }

    /**
     * 接收微信服务器发送来的消息
     * @param request
     * @return
     * @throws Exception
     */
    @PostMapping
    public String receiveMessage(HttpServletRequest request) throws Exception {

//        WxMpXmlMessage wxMpXmlMessage = WxMpXmlMessage.fromXml(request.getInputStream());
//        System.out.println(JSONObject.toJSONString(wxMpXmlMessage));

        Map<String, String> param = this.parseXml(request);
        String message = messageService.receiveMessage(param);
        return message;
    }

    private Map<String, String> parseXml(HttpServletRequest request) throws Exception {
        Map<String, String> map = new HashMap<String, String>();
        InputStream inputStream = request.getInputStream();
        SAXReader reader = new SAXReader();
        Document document = reader.read(inputStream);
        Element root = document.getRootElement();
        List<Element> elementList = root.elements();
        for (Element e : elementList) {
            map.put(e.getName(), e.getText());
        }
        inputStream.close();
        inputStream = null;
        return map;
    }
}

MessageServiceImpl：

package com.lxl.ggkt.wechat.service.impl;

import com.lxl.ggkt.client.course.CourseFeignClient;
import com.lxl.ggkt.model.vod.Course;
import com.lxl.ggkt.wechat.service.MessageService;
import me.chanjar.weixin.common.error.WxErrorException;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.bean.template.WxMpTemplateData;
import me.chanjar.weixin.mp.bean.template.WxMpTemplateMessage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Random;

@Service
public class MessageServiceImpl implements MessageService {

    @Autowired
    private CourseFeignClient courseFeignClient;

    @Autowired
    private WxMpService wxMpService;

    //接收消息
    @Override
    public String receiveMessage(Map<String, String> param) {
        String content = "";
        try {
            String msgType = param.get("MsgType");
            switch(msgType){
                case "text" :
                    content = this.search(param);
                    break;
                case "event" :
                    String event = param.get("Event");
                    String eventKey = param.get("EventKey");
                    if("subscribe".equals(event)) {//关注公众号
                        content = this.subscribe(param);
                    } else if("unsubscribe".equals(event)) {//取消关注公众号
                        content = this.unsubscribe(param);
                    } else if("CLICK".equals(event) && "aboutUs".equals(eventKey)){
                        content = this.aboutUs(param);
                    } else {
                        content = "success";
                    }
                    break;
                default:
                    content = "success";
            }
        } catch (Exception e) {
            e.printStackTrace();
            content = this.text(param, "请重新输入关键字，没有匹配到相关视频课程").toString();
        }
        return content;
    }

    @Override
    public void pushPayMessage(long id) {

        String openid = "oYtdy6gjiie2TF8o74YJbeJItpCA";
        WxMpTemplateMessage templateMessage = WxMpTemplateMessage.builder()
                .toUser(openid)//要推送的用户openid
                .templateId("ivOxy9PfqDONOWOqOqjvppO-YYebxVbPLBog1e-4nEU")//模板id
                .url("http://ggkt2.vipgz1.91tunnel.com/#/pay/"+id)//点击模板消息要访问的网址
                .build();
        //3,如果是正式版发送消息，，这里需要配置你的信息
        templateMessage.addData(new WxMpTemplateData("first", "亲爱的用户：您有一笔订单支付成功。", "#272727"));
        templateMessage.addData(new WxMpTemplateData("keyword1", "1314520", "#272727"));
        templateMessage.addData(new WxMpTemplateData("keyword2", "java基础课程", "#272727"));
        templateMessage.addData(new WxMpTemplateData("keyword3", "2022-01-11", "#272727"));
        templateMessage.addData(new WxMpTemplateData("keyword4", "100", "#272727"));
        templateMessage.addData(new WxMpTemplateData("remark", "感谢你购买课程，如有疑问，随时咨询！", "#272727"));
        try {
            String msg = wxMpService.getTemplateMsgService().sendTemplateMsg(templateMessage);
        } catch (WxErrorException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 关于我们
     * @param param
     * @return
     */
    private String aboutUs(Map<String, String> param) {
        return this.text(param, "硅谷课堂现开设Java、HTML5前端+全栈、大数据、全链路UI/UE设计、人工智能、大数据运维+Python自动化、Android+HTML5混合开发等多门课程；同时，通过视频分享、谷粒学苑在线课堂、大厂学苑直播课堂等多种方式，满足了全国编程爱好者对多样化学习场景的需求，已经为行业输送了大量IT技术人才。").toString();
    }

    /**
     * 处理关注事件
     * @param param
     * @return
     */
    private String subscribe(Map<String, String> param) {
        //处理业务
        return this.text(param, "感谢你关注“硅谷课堂”，可以根据关键字搜索您想看的视频教程，如：JAVA基础、Spring boot、大数据等").toString();
    }

    /**
     * 处理取消关注事件
     * @param param
     * @return
     */
    private String unsubscribe(Map<String, String> param) {
        //处理业务
        return "success";
    }

    /**
     * 处理关键字搜索事件
     * 图文消息个数；当用户发送文本、图片、语音、视频、图文、地理位置这六种消息时，开发者只能回复1条图文消息；其余场景最多可回复8条图文消息
     * @param param
     * @return
     */
    private String search(Map<String, String> param) {
        String fromusername = param.get("FromUserName");
        String tousername = param.get("ToUserName");
        String content = param.get("Content");
        //单位为秒，不是毫秒
        Long createTime = new Date().getTime() / 1000;
        StringBuffer text = new StringBuffer();
        List<Course> courseList = courseFeignClient.findByKeyword(content);
        if(CollectionUtils.isEmpty(courseList)) {
            text = this.text(param, "请重新输入关键字，没有匹配到相关视频课程");
        } else {
            //一次只能返回一个
            Random random = new Random();
            int num = random.nextInt(courseList.size());
            Course course = courseList.get(num);
            StringBuffer articles = new StringBuffer();
            articles.append("<item>");
            articles.append("<Title><![CDATA["+course.getTitle()+"]]></Title>");
            articles.append("<Description><![CDATA["+course.getTitle()+"]]></Description>");
            articles.append("<PicUrl><![CDATA["+course.getCover()+"]]></PicUrl>");
            articles.append("<Url><![CDATA[http://glkt.atguigu.cn/#/liveInfo/"+course.getId()+"]]></Url>");
            articles.append("</item>");

            text.append("<xml>");
            text.append("<ToUserName><![CDATA["+fromusername+"]]></ToUserName>");
            text.append("<FromUserName><![CDATA["+tousername+"]]></FromUserName>");
            text.append("<CreateTime><![CDATA["+createTime+"]]></CreateTime>");
            text.append("<MsgType><![CDATA[news]]></MsgType>");
            text.append("<ArticleCount><![CDATA[1]]></ArticleCount>");
            text.append("<Articles>");
            text.append(articles);
            text.append("</Articles>");
            text.append("</xml>");
        }
        return text.toString();
    }

    /**
     * 回复文本
     * @param param
     * @param content
     * @return
     */
    private StringBuffer text(Map<String, String> param, String content) {
        String fromusername = param.get("FromUserName");
        String tousername = param.get("ToUserName");
        //单位为秒，不是毫秒
        Long createTime = new Date().getTime() / 1000;
        StringBuffer text = new StringBuffer();
        text.append("<xml>");
        text.append("<ToUserName><![CDATA["+fromusername+"]]></ToUserName>");
        text.append("<FromUserName><![CDATA["+tousername+"]]></FromUserName>");
        text.append("<CreateTime><![CDATA["+createTime+"]]></CreateTime>");
        text.append("<MsgType><![CDATA[text]]></MsgType>");
        text.append("<Content><![CDATA["+content+"]]></Content>");
        text.append("</xml>");
        return text;
    }
}

测试号申请模版消息展示：

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微信授权登录：

测试号配置网页授权获取用户基本信息：

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完成前端之后引入微信工具包：

<dependencies>
    <dependency>
        <groupId>com.github.binarywang</groupId>
        <artifactId>weixin-java-mp</artifactId>
        <version>2.7.0</version>
    </dependency>

    <dependency>
        <groupId>dom4j</groupId>
        <artifactId>dom4j</artifactId>
        <version>1.1</version>
    </dependency>

    <dependency>
        <groupId>com.aliyun</groupId>
        <artifactId>aliyun-java-sdk-core</artifactId>
    </dependency>
</dependencies>

同时配置微信公众号的id和密钥

wechat.mpAppId: wxd4e0bcc0aa6b50d0

wechat.mpAppSecret: ad5712c888df46205b11fb77cddd0f0a

wechat.userInfoUrl: http://ggktlxl.free.idcfengye.com/api/user/wechat/userInfo

工具类ConstantPropertiesUtil和WeChatMpConfig配置见前章。

使用token实现用户信息传递：

导入jwt的依赖：

<dependencies>
	<dependency>
		<groupId>org.apache.httpcomponents</groupId>
		<artifactId>httpclient</artifactId>
	</dependency>
	<dependency>
		<groupId>io.jsonwebtoken</groupId>
		<artifactId>jjwt</artifactId>
	</dependency>
	<dependency>
		<groupId>joda-time</groupId>
		<artifactId>joda-time</artifactId>
	</dependency>
</dependencies>

增加JWT工具类：

package com.lxl.ggkt.utils;

import io.jsonwebtoken.*;
import org.springframework.util.StringUtils;

import java.util.Date;

public class JwtHelper {
    //token字符串有效时间
    private static long tokenExpiration = 24*60*60*1000;
    //加密编码秘钥
    private static String tokenSignKey = "123456";

    //根据userid  和  username 生成token字符串
    public static String createToken(Long userId, String userName) {
        String token = Jwts.builder()
                //设置token分类
                .setSubject("GGKT-USER")
                //token字符串有效时长
                .setExpiration(new Date(System.currentTimeMillis() + tokenExpiration))
                //私有部分（用户信息）
                .claim("userId", userId)
                .claim("userName", userName)
                //根据秘钥使用加密编码方式进行加密，对字符串压缩
                .signWith(SignatureAlgorithm.HS512, tokenSignKey)
                .compressWith(CompressionCodecs.GZIP)
                .compact();
        return token;
    }

    //从token字符串获取userid
    public static Long getUserId(String token) {
        if(StringUtils.isEmpty(token)) return null;
        Jws<Claims> claimsJws = Jwts.parser().setSigningKey(tokenSignKey).parseClaimsJws(token);
        Claims claims = claimsJws.getBody();
        Integer userId = (Integer)claims.get("userId");
        return userId.longValue();
    }

    //从token字符串获取getUserName
    public static String getUserName(String token) {
        if(StringUtils.isEmpty(token)) return "";
        Jws<Claims> claimsJws
                = Jwts.parser().setSigningKey(tokenSignKey).parseClaimsJws(token);
        Claims claims = claimsJws.getBody();
        return (String)claims.get("userName");
    }

    public static void main(String[] args) {
        String token = JwtHelper.createToken(1L, "lucy");
        System.out.println(token);
        System.out.println(JwtHelper.getUserId(token));
        System.out.println(JwtHelper.getUserName(token));
    }
}