[英]cannot app.get('foo') (Express/Node JS)
I am currently working on adding a real-time chat into a particular website. 我目前正在为特定网站添加实时聊天。 I am using Express JS package and the initialization information (ie start/listen server, etc.) is located in 'www/bin' (by default).
我正在使用Express JS软件包,并且初始化信息(即启动/监听服务器等)位于“ www / bin”(默认情况下)中。
So, this is my init file (ie 'www/bin'): 因此,这是我的初始化文件(即“ www / bin”):
/**
* Module dependencies.
*/
var app = require('../app');
var debug = require('debug')('nodeblog:server');
var http = require('http');
/**
* Get port from environment and store in Express.
*/
var port = normalizePort(process.env.PORT || '3000');
app.set('port', port);
/**
* Create HTTP server.
*/
var server = http.createServer(app);
/**
* Listen to Sockets
*/
var io = require('socket.io').listen(server);
app.set('socketio', io); // FIXME: Cannot app.get('socketio') w/out req
/**
* Listen on provided port, on all network interfaces.
*/
server.listen(port);
server.on('error', onError);
server.on('listening', onListening);
And the thing is that I cannot 'get' this SocketIO declaration as I need in one of the router files to exchange messages between client/server. 事实是,我无法像在路由器文件之一中那样“获取”此SocketIO声明以在客户端/服务器之间交换消息。
Here is this route file: 这是此路由文件:
var express = require('express');
var router = express.Router();
var app = express();
// Models
var auth = require('../models/auth');
var io = app.get('socketio');
router.get('/', auth.ensureAuthenticated, function(req, res, next) {
res.render('chat', {
title: 'Chat'
});
});
io.on('connection', function(socket){
console.log('a user connected');
socket.on('chat message', function(msg) {
io.emit('chat message', msg);
});
socket.on('disconnect', function(){
console.log('user disconnected');
});
});
module.exports = router;
So, when I try to app.get('socketio)' it returns undefined
因此,当我尝试app.get('socketio)'时,它返回的是
undefined
Do you know how do I need to correctly declare this app.get('socketio',io)
so that I can access it anywhere (but not into the request methods) 您知道如何正确声明此
app.get('socketio',io)
以便可以在任何地方访问它(但不能访问请求方法)
Error: 错误:
chat.js:15
io.on('connection', function(socket){
^
TypeError: Cannot read property 'on' of undefined
Firstly, we need to separate our function (containing io.on('connection', ...)
in a separate file. 首先,我们需要将函数(包含
io.on('connection', ...)
分开在单独的文件中。
Secondly, we need to add to the 'www/bin' so server can listen to it as well. 其次,我们需要添加到“ www / bin”,以便服务器也可以收听它。 Answer is if we change in 'www/bin':
答案是如果我们更改“ www / bin”:
var io = require('socket.io').listen(server);
require('../models/socketio.js')(io);
That's the answer. 那就是答案。
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