如何关闭服务器端的sockjs连接?

时间:2014-07-23 10:52:15

标签: javascript node.js websocket chat sockjs

因此,每次刷新页面时,似乎sockjs正在创建一个新连接。

我在每个channel.onmessage上将每条消息保存到我的mongodb,所以如果我刷新我的页面7次并发送消息,我会将7条相同内容的消息保存到我的mongodb中。

这是非常有问题的,因为当我进入聊天室时检索这些消息时,为了查看日志,我会看到一堆重复的消息。

我想跟踪所有“活动”的连接,如果用户尝试建立另一个连接,我希望能够从服务器端强制关闭旧连接,因此只有1个连接一次收听每条消息

我该怎么做?

var connections = {};

//creating the sockjs server
var chat = sockjs.createServer();

//installing handlers for sockjs server instance, with the same url as client
chat.installHandlers(server, {prefix:'/chat/private'});

var multiplexer = new multiplexServer.MultiplexServer(chat);

var configChannel = function (channelId, userId, userName){
  var channel = multiplexer.registerChannel(channelId);

  channel.on('connection', function (conn) {
    // console.log('connection');
    console.log(connections);
    connections[channelId] = connections[channelId] || {};

    if (connections[channelId][userId]) {
      //want to close the extra connection
    } else {
      connections[channelId][userId] = conn;
    }

    // }


    // if (channels[channelId][userId]) {
    //   conn = channels[channelId][userId];
    // } else {
    //   channels[channelId][userId] = conn;
    // }

    // console.log('accessing channel! ', channels[channelId]);

    conn.on('new user', function (data, message) {
      console.log('new user! ', data, message);
    });

    // var number = connections.length;

    conn.on('data', function(message) {
      var messageObj = JSON.parse(message);
      handler.saveMessage(messageObj.channelId, messageObj.user, messageObj.message);
      console.log('received the message, ', messageObj.message);
      conn.write(JSON.stringify({channelId: messageObj.channelId, user: messageObj.user, message: messageObj.message }));
    });
    conn.on('close', function() {
      conn.write(userName + ' has disconnected');
    });
  });
  return channel;
};

1 个答案:

答案 0 :(得分:0)

只需使用.close

if (connections[channelId][userId]) {
  // want to close the extra connection
  connections[channelId][userId].close();
} else {
  connections[channelId][userId] = conn;
}