节点服务器无法与express-ws一起使用 [英] node server not working with express-ws

问题描述

我有一个节点WebServer，它能够通过Websockets与Browser(例如browserInstance)和linux终端(例如ProxyInstance)进行通信. Web服务器的工作是将数据从终端移交给WebBrowser，反之亦然.请在下面找到server.js代码:

I have a node WebServer capable of communicating with Browser(say browserInstance) and linux terminal(say ProxyInstance) via Websockets. The job of the webserver is to handover the data from terminal to WebBrowser and vice-verse. Please find the server.js code below:

var express = require('express');
var expressWs = require('express-ws');


var expressWs = expressWs(express());
var app = expressWs.app;
var appForpage = express();


var browserInstance;
var ProxyInstance;
var browserCounter = 0;
var ProxyCounter = 0;


app.ws('/fromBrowser', function(ws, req, next) {

    console.log("~~~~~~~~~~~~BROWSER");

    if(browserCounter == 1){
            ws.on('message', function(msg) {
                    console.log("Messagae from Browser :", msg);
                    ProxyInstance.send(msg);
            });
    }else{
            browserInstance = ws;
            ws.on('message', function(msg) {
                    console.log("Message from Browser :", msg);
                    ProxyInstance.send(msg);
            });

            browserCounter = 1;
    }


     ws.on('close', function(){
          console.log("Ws Connection closed");
    });

    //next();
});

app.ws('/fromProxy', function(ws, req, next) {
    console.log("~~~~~~~~~~~~PROXY");

    if(ProxyCounter == 0){
            ProxyInstance = ws;
            ProxyCounter = 1;
    }else if(browserCounter == 1){
            ws.on('message', function(msg) {
                    console.log("Message from Proxy: ", msg);
                    browserInstance.send(msg);
            });
    }

    ws.on('close', function(){
          console.log("Ws Connection closed");
    });
    //next();
});

appForpage.use(express.static(__dirname + '/public/')); // index.html resides in public directory

appForpage.listen(5000)
app.listen(3000)

首先，我要创建从代理到Web服务器的ws连接(/fromProxy)，然后从浏览器(/fromBrowser)建立ws连接.连接已成功创建.当我尝试通过Web服务器将数据从浏览器发送到代理时，它工作正常.当尝试通过WebServer与浏览器进行通信时，作为代理端的第一条消息的返回，此消息失败.我尚未收到来自代理的任何消息.我需要按照相同的顺序运行各个端点(首先是代理，然后是浏览器..).

First I am creating ws connection from proxy to webserver(/fromProxy) and then from browser(/fromBrowser). The connection was successfully created. When i try to send data from Browser to proxy via Webserver, it works fine. In return to the 1st message at proxy end when tries to communicate Browser via WebServer, this one failed. I haven't received any message from Proxy. I need to run the respective ends in the same order(Proxy first and then Browser..).

我只是节点的初学者.对于我的案子，我还没有找到任何互联网上的例子.我在这里想念什么?

I am just beginner to node. I haven't find any example over internet for my case. What am I missing here ?

推荐答案

那真是愚蠢:(.我还没有从代理注册我的messsage回调.请在下面找到可用的代码.

That's really silly :( .I haven't registered my messsage callback from proxy. Please find the working code below.

var express = require('express');
var expressWs = require('express-ws');


var expressWs = expressWs(express());
var app = expressWs.app;
var appForpage = express();


var browserInstance;
var ProxyInstance;
var browserCounter = 0;
var ProxyCounter = 0;


app.ws('/fromBrowser', function(ws, req, next) {

    console.log("~~~~~~~~~~~~BROWSER");

    if(browserCounter == 1){
            ws.on('message', function(msg) {
                    console.log("Messagae from Browser :", msg);
                    ProxyInstance.send(msg);
            });
    }else{
            browserInstance = ws;
            ws.on('message', function(msg) {
                    console.log("Message from Browser :", msg);
                    ProxyInstance.send(msg);
            });

            browserCounter = 1;
    }


     ws.on('close', function(){
          console.log("Ws Connection closed");
    });

    //next();
});

app.ws('/fromProxy', function(ws, req, next) {
    console.log("~~~~~~~~~~~~PROXY");

    if(ProxyCounter == 0){
            ProxyInstance = ws;
            ProxyCounter = 1;
    }

/*This is the place where i went wrong. damnn..*/
    ws.on('message', function(msg) {
           console.log("Message from Proxy: ", msg);
           browserInstance.send(msg);
    });

    ws.on('close', function(){
          console.log("Ws Connection closed");
    });
    //next();
});

appForpage.use(express.static(__dirname + '/public/')); // index.html resides in public directory

appForpage.listen(5000)
app.listen(3000)

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