这是我第一次使用Socket.io。我有一个聊天应用程序,我在两个不同的文件上创建; server.js和pi.js,每个都托管在两个不同的端口上(服务器在3000上,pi在3001上)。我指的是https://socket.io/get-started/chat/作为指南。请参阅下文(请注意,此文件中有许多模块;我已经构建了一个Web应用程序,该应用程序具有单独的用途,因此在这种情况下大多数都可以忽略):
server.js
const express = require('express'),
app = express(),
port = process.env.PORT || 3000,
mongoose = require('mongoose'),
pug = require('pug'),
router = express.Router(),
User = require('./api/models/userAPIModel'),
bodyParser = require('body-parser'),
path = require('path'),
cool = require('cool-ascii-faces'),
pg = require('pg'),
http = require('http').Server(app),
io = require('socket.io')(http),
request = require('request');
app.get('/theTest', function(req, res){
res.sendFile(__dirname + '/views/index.html');
});
var clients = 0;
io.on('connection', function(socket) { //on connection, it will show up in the console, and vice versa.
clients++;
console.log('User connected. Clients currently connected: ' + clients);
socket.on('chat message', function(msg) {
console.log('message: ' + msg);
io.sockets.emit('chat message', msg);
});
socket.on('disconnect', function() {
clients--;
console.log('user disconnected');
});
});
http.listen(3000, function() {
console.log('listening on *:3000');
});
我的HTML文件:
<!doctype html>
<html>
<head>
<title>Socket</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font: 13px Helvetica, Arial; }
form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
#messages { list-style-type: none; margin: 0; padding: 0; }
#messages li { padding: 5px 10px; }
#messages li:nth-child(odd) { background: #eee; }
</style>
</head>
<body>
<ul id="messages"></ul>
<form action="">
<input id="m" autocomplete="off" /><button>Send</button>
</form>
<script src="/socket.io/socket.io.js"></script>
<script src="https://code.jquery.com/jquery-1.11.1.js"></script>
<script>var socket = io();</script>
<script>
$(function () {
var socket = io();
$('form').submit(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>
然后我的另一个文件(我称之为pi.js),我在端口3001上托管,我希望能够使用它与端口3000进行通信,这是无效的:
const app = require('express')(),
http = require('http').Server(app),
io = require('socket.io')(http);
app.get('/theTest', function(req, res){
res.sendFile(__dirname + '/views/index.html');
});
// io.connect('http://localhost:3000');
var clients = 0;
io.on('connection', function(socket) { //on connection, it will show up in the console, and vice versa.
clients++;
console.log('User connected. Clients currently connected: ' + clients);
socket.on('chat message', function(msg) {
console.log('message: ' + msg);
io.sockets.emit('chat message', msg);
});
socket.on('disconnect', function() {
clients--;
console.log('user disconnected');
});
});
http.listen(3001, function() {
console.log('listening on *:3001');
});
当我测试这个时,server.js和pi.js没有按照我想要的方式进行通信,因为当我打开这两个应用程序时,我可以在其中一个上输入消息,但它会没有出现在另一方面。当我在两个不同的选项卡中打开其中一个文件时,它们可以相互通信。但是,我假设因为HTML文档的脚本标记与端口3000连接,那么它们应该能够进行通信。我在这里做错了什么?