Project training - picture storage

picture storage

Specify external oss storage, such as Alibaba Cloud, Qiniu Cloud, and git warehouse. The project chooses gitee warehouse, first build a new warehouse -- configure the key -- java simulates HTTP request to send upload request -- return access link to save database

@Override
public String upLoad(InputStream inputStream, String path) {
    //根据存储地区创建上传对象
    System.out.println(inputStream + "  " + path);
    //设置转存到Gitee仓库参数
    String paramImgFile = Base64.encode(inputStream);
    Map<String, Object> paramMap = new HashMap<String, Object>();
    paramMap.put("access_token", GiteeImgBed.ACCESS_TOKEN);
    paramMap.put("message", GiteeImgBed.ADD_MESSAGE);
    paramMap.put("content", paramImgFile);
    //转存文件路径
    String targetDir =GiteeImgBed.PATH +  path;
    String requestUrl = String.format(GiteeImgBed.CREATE_REPOS_URL, GiteeImgBed.OWNER,
            GiteeImgBed.REPO_NAME, targetDir);
    System.out.println("Url" + requestUrl);
    //工具类模拟post请求
    String resultJson = HttpUtil.post(requestUrl, paramMap);
    return getUrlFromJson(resultJson);//自己实现从json中提取指定的字符串
}

chat

 send() {
      if (!this.chatUser) {
        this.$message({type: 'warning', message: "请选择聊天对象"})
        return;
      }
      if (!this.text) {
        this.$message({type: 'warning', message: "请输入内容"})
      } else {
        if (typeof (WebSocket) == "undefined") {
          console.log("您的浏览器不支持WebSocket");
        } else {
          console.log("您的浏览器支持WebSocket");
          // 组装待发送的消息 json
          // {"from": "zhang", "to": "admin", "text": "聊天文本"}
          let message = {from: this.user.username, to: this.chatUser, text: this.text}
          socket.send(JSON.stringify(message));  // 将组装好的json发送给服务端，由服务端进行转发
          this.messages.push({user: this.user.username, text: this.text})
          // 构建消息内容，本人消息
          this.createContent(null, this.user.username, this.text)
          this.text = '';
        }
      }
    },

 createContent(remoteUser, nowUser, text) {  // 这个方法是用来将 json的聊天消息数据转换成 html的。
      let html
      // 当前用户消息
      if (nowUser) { // nowUser 表示是否显示当前用户发送的聊天消息，绿色气泡
        html = "<div class=\"el-row\" style=\"padding: 5px 0\">\n" +
            "  <div class=\"el-col el-col-22\" style=\"text-align: right; padding-right: 10px\">\n" +
            "    <div class=\"tip left\">" + text + "</div>\n" +
            "  </div>\n" +
            "  <div class=\"el-col el-col-2\">\n" +
            "  <span class=\"el-avatar el-avatar--circle\" style=\"height: 40px; width: 40px; line-height: 40px;\">\n" +
            "    <img src=\"https://cube.elemecdn.com/3/7c/3ea6beec64369c2642b92c6726f1epng.png\" style=\"object-fit: cover;\">\n" +
            "  </span>\n" +
            "  </div>\n" +
            "</div>";
      } else if (remoteUser) {   // remoteUser表示远程用户聊天消息，蓝色的气泡
        html = "<div class=\"el-row\" style=\"padding: 5px 0\">\n" +
            "  <div class=\"el-col el-col-2\" style=\"text-align: right\">\n" +
            "  <span class=\"el-avatar el-avatar--circle\" style=\"height: 40px; width: 40px; line-height: 40px;\">\n" +
            "    <img src=\"https://cube.elemecdn.com/3/7c/3ea6beec64369c2642b92c6726f1epng.png\" style=\"object-fit: cover;\">\n" +
            "  </span>\n" +
            "  </div>\n" +
            "  <div class=\"el-col el-col-22\" style=\"text-align: left; padding-left: 10px\">\n" +
            "    <div class=\"tip right\">" + text + "</div>\n" +
            "  </div>\n" +
            "</div>";
      }
      console.log(html)
      this.content += html;
    },

 init() {
      this.user = sessionStorage.getItem("user") ? JSON.parse(sessionStorage.getItem("user")) : {}
      let username = this.user.username;
      let _this = this;
      if (typeof (WebSocket) == "undefined") {
        console.log("您的浏览器不支持WebSocket");
      } else {
        console.log("您的浏览器支持WebSocket");
        let socketUrl = "ws://localhost:9090/imserver/" + username;
        if (socket != null) {
          socket.close();
          socket = null;
        }
        // 开启一个websocket服务
        socket = new WebSocket(socketUrl);
        //打开事件
        socket.onopen = function () {
          console.log("websocket已打开");
        };
        //  浏览器端收消息，获得从服务端发送过来的文本消息
        socket.onmessage = function (msg) {
          console.log("收到数据====" + msg.data)
          let data = JSON.parse(msg.data)  // 对收到的json数据进行解析， 类似这样的： {"users": [{"username": "zhang"},{ "username": "admin"}]}
          if (data.users) {  // 获取在线人员信息
            _this.users = data.users.filter(user => user.username !== username)  // 获取当前连接的所有用户信息，并且排除自身，自己不会出现在自己的聊天列表里
          } else {
            // 如果服务器端发送过来的json数据 不包含 users 这个key，那么发送过来的就是聊天文本json数据
            //  // {"from": "zhang", "text": "hello"}
            if (data.from === _this.chatUser) {
              _this.messages.push(data)
              // 构建消息内容
              _this.createContent(data.from, null, data.text)
            }
          }
        };
        //关闭事件
        socket.onclose = function () {
          console.log("websocket已关闭");
        };
        //发生了错误事件
        socket.onerror = function () {
          console.log("websocket发生了错误");
        }
      }