Question

我制作了一个非常随意的评论系统，现在我想添加回复。因此，当有人在其他人的评论上发布回复时，该用户必须通知某人回复了他们的评论。为了做到这一点，当replier单击回复按钮时，向服务器发出AJAX post请求，服务器然后需要获取第一个评论者的id并使用socket.io向他们发送响应文本（socket.io是如果有另一种方式将回复文本发送给另一个模块或表达自己，则不需要使用）。到目前为止，这是我的代码：

module MyModule
  def self.included(base)
    base.extend(ClassMethods)
  end

  module ClassMethods
    def fields
      (@fields || []) + (superlcass.respond_to?(:fields) ? superclass.fields : []) 
    end
    def field(name)
      (@fields ||= []) << name.to_sym
    end
  end
end

Answer 1

//app.js file   
var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('socket.io').listen(server);
var routes = require('./routes/routes')(io);
app.use('/', routes);

//router file
var express = require('express');
var router = express.Router();
var _socket = null;

//list of socket users.once they logout delete the socket by 
//delete users[_socket.userid];
var users = {};

var returnRouter = function(io) {

    io.sockets.on('connection', function (socket) {
        //now _Socket is available inside routes
       _socket =  socket;
    });

    router.post('/login', function(req, res) {
        //authentication logic
        User.findOne({'email': req.body.email}, function (err, user) {

           //userid must be unique
           _socket.userId= user.userId
           //set session variable to store id of the user
           req.session.userId = user.userId;
           //now every user has a socket associated with their id
           users[_socket.userId] = _socket;
        });
    });

    router.post('/reply', function (req, res) {
       var commenterId = req.body.userId;
       User.findOne({'_id': commenterId}, function (err, user) {

       // you can get the id of the logged in user that is the creator
       //of the original post from req.session.userId
       //if you have implemented session store

       //the commenter user object is obtained from findOne method
       users[req.session.userId].emit('notification', {
         notification: user.username+' commented on your post'
       }});
       });
       res.end();
    });

    return router;
};
module.exports = returnRouter;

Node.js：在express.js路由中使用Socket.io将消息发送到特定客户端

1 个答案: