Socket.IO Angular服务器到服务器的连接

Question

Is it possible to do a simple socket.io connection on a client server running in gulp to a other server running in node?

    .--------.      .----------.      .----------.
    |SERVER A|      |          |      | SERVER B |
    | (Gulp) |      |  CLIENT  |      | (Nodejs) |
    |  PORT  | <--> |   SIDE   | <--> |   PORT   |
    |  2772  |      |          |      |   8000   |
    '--------'      '----------'      '----------'

I tried to use the socket.io-client but I'm a bit confused.. but I use it like this:

Server.js

    var http = require('http').Server(app);
    var io = require('socket.io')(http);
    var port = process.env.PORT || 8000;
    var ioClient = require('socket.io-client');
    var client = ioClient.connect( "http://localhost:" + 2772 );

    io.on('connection', function(socket){
      console.log('a user connected')
      socket.on('disconnect', function(){
        console.log("a user disconnected")
      });
    });

     client.on('connection', function(socket){
       console.log('a user connected')
       client.on('disconnect', function(){
         console.log("a user disconnected")
       });
     });

In my Angular..

App.js

    var myApp = angular.module('ngclient', ['ngRoute','ui.bootstrap','ui.select','ngSanitize', 'btford.socket-io']);

Controller

    myApp.controller('dailydoseController', ['$scope', 'chatSocket', function($scope, chatSocket){


    }]);

Factory

myApp.factory('chatSocket', ['socketFactory', function(socketFactory){


   return socketFactory;
}]);

Its just the relevant... the entire code is too long.. Please help

Answer 1

I'm not sure I've fully understood your question.

In the client side (Angular in your case) you can use client implementation of socket.io (or with Angular component implementing socket-io client https://github.com/btford/angular-socket-io ).

In your node server, you should use server component of socket-io like the following one.

var app = require('http').createServer(handler)
var io = require('socket.io')(app);
io.on('connection', function (socket) {
  // handle connection
})

Consider that even tough websocket are bidirectional, we still have a 'client' and the 'server'. In your case the 'client' is Angular running on the browser and the 'server' is node. The node server cannot open the websocket directly with the client because the WebSockets API on the browser does not provide a way to listen for connections.

Hope it helps!