Javascript 如何在从外部连接时将外部文件包含到节点js项目中
server.jsJavascript 如何在从外部连接时将外部文件包含到节点js项目中,javascript,node.js,Javascript,Node.js,server.js var app = require('express')(); var http = require('http').Server(app); var io = require('socket.io')(http); app.get('/', function(req, res){ res.sendFile(__dirname + '/index.html'); }); io.on('connection', function(socket){ socket.on
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', function(req, res){
res.sendFile(__dirname + '/index.html');
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
});
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
index.html
<!doctype html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Socket.IO chat</title>
<link href="style.css" rel="stylesheet" type="text/css">
</head>
<body>
<div id="chat">
<ul id="messages"></ul>
<input id="m" autocomplete="off">
<div id="button">Send</div>
</div>
<script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script>
var socket = io();
$('#button').on('click touchstart', function(){
socket.emit('chat message', $('#m').val());
$('#m').val('');
return false;
});
socket.on('chat message', function(msg){
$('#messages').append($('<li>').text(msg));
});
</script>
</body>
</html>
听起来你可能没有把事情安排好。您需要在路由之前声明静态路径。大概是这样的:
var express = require('express');
var app = express();
app.use(express.static(path.join(__dirname, 'public')));
app.get('/', function(req, res){
res.sendFile(__dirname + '/index.html');
});
以下是您的server.js
文件的更新版本:
var express = require('express');
var app = express();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.use(express.static(path.join(__dirname, 'public')));
app.get('/', function(req, res){
res.sendFile(__dirname + '/index.html');
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
});
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
问题是,在此代码中
express
returnsexpress未定义
您能否构造代码,使其在我包含的服务器代码下工作,或者简要指示我如何重新定义变量,使其不会返回这些错误;)现在有了您提供的新代码,我得到了错误路径未定义
为什么会这样?哦,我解决了它,我只是缺少var path=require('path'),也应该是/public
,而不是public
,现在它可以工作了,谢谢:)
var express = require('express');
var app = express();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.use(express.static(path.join(__dirname, 'public')));
app.get('/', function(req, res){
res.sendFile(__dirname + '/index.html');
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
});
});
http.listen(3000, function(){
console.log('listening on *:3000');
});