概述
我正在与两个实体合作：（i）IRC webapp和（ii）IRC机器人 . 有一个机器人变量 botVariable ，我试图使用 socket.io 来做这个并且失败了 . To me, what makes this problem interesting is that I'm trying to pass a value not from the IRC webapp server to the webapp client, but from the bot server to the webapp client. 这是我第一次使用socket.io . bot和irc webapp都托管在（不同的）heroku url上 .
Bot代码（服务器端）
对于机器人，我有以下代码：
var botVariable = "bot string"; //botVariable is global.
var io = require('socket.io')(HTTPS);
io.on('connection', function(botVariable) {
//When client connects for the first time, send him the value immediately
socket.emit('new_value', botVariable);
console.log(botVariable);
});
console.log("End of bot file.");
IRC代码（客户端）
对于IRC客户端代码，我有以下内容：
<head>
<script src="https://bot.herokuapp.com/socket.io/socket.io.js"></script>
</head>
<h2 id="bv" align="center"></h2> // where I eventually want to show botVariable
<script>
var socket = io.connect("http://bot.herokuapp.com/"); //this is where I host the bot
socket.on('new_value', function(botVariable) {
console.log(botVariable);
cBotVariable = botVariable; //I'm trying to make cBotVariable a global variable I can refer to on the client side
});
document.getElementById("bv").innerHTML = cBotVariable;
</script>
结果/错误
当我加载网站时， botVariable 无法显示 . 我在控制台中收到以下错误 .
> GET http://bot.herokuapp.com/socket.io/socket.io.js
(index):78
> Uncaught ReferenceError: io is not defined
当我去bot.herokuapp.com/socket.io/socket.io.js时，它说 Could not find path: /socket.io/socket.io.js .
我的印象是你不需要提供这个文件，但服务器会以某种方式动态创建它 . 我想情况并非如此？
1 回答
尝试安装socket.io
并包括：
或使用CDN：