Socket.IO错误'listen()'方法在移动到Express 3.0之后需要一个“httpServer”实例 [英] Socket.IO error 'listen()' method expects an 'http.Server' instance after moving to Express 3.0
问题描述
我今天开始学习Node.js,我有点困难。
I literally began learning Node.js today and I'm a little stuck.
Following this example, I get the following error when I try executing the js file:
Warning: express.createServer() is deprecated, express
applications no longer inherit from http.Server,
please use:
var express = require("express");
var app = express();
Socket.IO's `listen()` method expects an `http.Server` instance
as its first parameter. Are you migrating from Express 2.x to 3.x?
If so, check out the "Socket.IO compatibility" section at:
https://github.com/visionmedia/express/wiki/Migrating-from-2.x-to-3.x
info - socket.io started
我不知道如何解决这个问题。
I don't know how to fix this. I would appreciate any direction.
请帮助。
更新
由比尔的修改代码导致的错误:
Error resulting from Bill's modified code:
/home/sisko/NodeJS/nodeSerialServer/serialServer.js:24
var app = express()
^
ReferenceError: express is not defined
at Object.<anonymous> (/home/sisko/NodeJS/nodeSerialServer/serialServer.js:24:12)
at Module._compile (module.js:449:26)
at Object.Module._extensions..js (module.js:467:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.runMain (module.js:492:10)
at process.startup.processNextTick.process._tickCallback (node.js:244:9)
推荐答案
有关如何初始化版本2和3之间的 express
应用程序的更改这个例子基于版本2,但是看起来你已经安装了版本3.你只需要更改几行来正确设置 socket.io
。更改以下行:
There was a change to how you initialize express
apps between versions 2 and 3. This example is based on version 2 but it looks like you've installed version 3. You just need to change a couple of lines to set up socket.io
correctly. Change these lines:
var app = require('express').createServer(),
io = require('socket.io').listen(app),
scores = {};
// listen for new web clients:
app.listen(8080);
到:
var express = require('express'),
app = express()
, http = require('http')
, server = http.createServer(app)
, io = require('socket.io').listen(server);
// listen for new web clients:
server.listen(8080);
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