Question

我正在尝试使用教程，其中可以使用Node.js和Socket.io与各种用户协作使用画布。以下是用于创建服务器的源文件。但是，当我打开浏览器时，它仍然在等待localhost。可能是什么原因？

我尝试更改端口号，以防万一造成问题。

    // Including libraries

var app = require('http').createServer(handler),
    io = require('socket.io').listen(app),
    static = require('node-static'); // for serving files

// This will make all the files in the current folder
// accessible from the web
var fileServer = new static.Server('./');

// This is the port for our web server.
// you will need to go to http://localhost:8080 to see it
app.listen(4994);

// If the URL of the socket server is opened in a browser
function handler (request, response) {

    request.addListener('end', function () {
        fileServer.serve(request, response);
    });
}

// Delete this row if you want to see debug messages
//io.set('log level', 1);

// Listen for incoming connections from clients
io.sockets.on('connection', function (socket) {

    // Start listening for mouse move events
    socket.on('mousemove', function (data) {

        // This line sends the event (broadcasts it)
        // to everyone except the originating client.
        socket.broadcast.emit('moving', data);
    });
});

Answer 1

解释我的更改

“使用严格”; //良好做法

“定义JavaScript代码应该以”严格模式“执行。” - http://www.w3schools.com/js/js_strict.asp

_static = require（'node-static'）;

将变量名称static更改为_static，因为static是严格模式下的保留关键字。

request.on（'data'，function（chunk）{}）; //你必须加上（'数据'）

这是主要问题，你必须添加request.on（'data'）事件，否则你必须在request.addListener之后恢复（'end'...作为@greed说。

var io = require（'socket.io'）。listen（server）;

我在代码中更改了此行的位置，因为您必须在使用“listen（server）”之前设置服务器。

"use strict"; //good practice
var http = require('http'),
    _static = require('node-static'); // for serving files

// This will make all the files in the current folder
// accessible from the web
var fileServer = new _static.Server('./');

// This is the port for our web server.
// you will need to go to http://localhost:8080 to see it

// If the URL of the socket server is opened in a browser
var server = http.createServer(function(request, response) {
  request.on('data', function (chunk) {}); //you have to add on ('data')

  request.addListener('end', function () {
      fileServer.serve(request, response);
  });
});

console.log("Starting up the server port 4994");
server.listen(4994);

var io = require('socket.io').listen(server); //you have to setup server first so this is the correct place to io.listen
// Delete this row if you want to see debug messages
//io.set('log level', 1);
// Listen for incoming connections from clients
io.sockets.on('connection', function (socket) {

    // Start listening for mouse move events
    socket.on('mousemove', function (data) {
        // This line sends the event (broadcasts it)
        // to everyone except the originating client.
        socket.broadcast.emit('moving', data);
    });
});

Answer 2

您需要在提供文件后恢复请求。

// If the URL of the socket server is opened in a browser
function handler (request, response) {
    request.addListener('end', function () {
        fileServer.serve(request, response);
    }).resume();
}

Node.js应用程序停留在等待localhost

2 个答案: