notes.md

Notes

1. webpack打包less，使用ExtractPlugin，style-loader和postcss-loader报错

{
     test: /\.(less)/,
     use: ExtractTextPlugin.extract({
       fallback: 'style-loader',
       use: [{
           loader: 'css-loader',
           options: {
             importLoaders: 1,
             minimize: true
           },
         },
         'postcss-loader',
         {
           loader: 'less-loader',
           options: {
             lessPlugins: [
               new LessPluginCleanCSS({
                 advanced: true,
               }),
             ],
           },
         }
       ]
     }),
   },

2. socket.io获取所有socket信息

//获取所有sockets，返回值为对象，键名为每个socket的socketid，id中不含命名空间名称，因此从namspace.adapter.clients获取的socketid需要处理
const sockets = io.sockets.sockets;
//遍历sockets
for(let id in sockets){
  const ip = sockets[id].handshake.address;
}

3. 使用namespace.adapter.clients获取在线用户列表

/* nsp.adapter.clients(rooms, async (err, clients) => {
    if (connected != 2) {
      //给新连接用户发送欢迎信息
      socket.emit(sid, helper.parseMsg('welcome', {
        type: 'welcome',
        content: `欢迎来到allChat聊天室，您所在的房间是：${room}.`,
      }));
      nsp.to(room).emit('online', {
        action: 'join',
        target: 'onlineUsers',
        message: `User(${ctx.session.user.userid}) joined.`,
        userinfo: ctx.session.user,
      });
      logger.info('#online_join', clients);
    }
    //给新连接用户发送当前在线列表
    // const onlineUsers = await service.user.getConnectionInfoBySocketid(clients);
    const onlineUsers = await service.user.getConnectionInfoInRoom(room);
    socket.emit('online', {
      action: 'update',
      target: 'self',
      onlineUsers: onlineUsers,
      onlineCount: onlineUsers.length + 1,
      max: hasRoom.max,
    });
  }); */