Nodejs - TypeError:无法读取未定义的属性“”headersSent“”
Nodejs - TypeError:无法读取未定义的属性“”headersSent“”
提问于 2018-07-02 01:24:19
我正在尝试使用nodejs，express和socket.io创建一个简单的聊天工具。但是当我运行我的应用程序时，我在finalhandler中收到了一个erro。但我甚至不知道这是什么。谷歌这次也没能帮上忙
我得到的只是一些github的讨论，没有什么真正对我有帮助的
什么是finalhandler？我甚至尝试重新启动我的项目，只是使用了socketio和服务器，我得到了同样的错误
app.js：
var express = require("express")();
var http = require("http").Server(app);
var io = require("socket.io")(http);
var path = require("path");
var app = express();
var clients = {};
app.set('view engine', 'ejs');
app.use(express.static(__dirname + '/public'));
app.get('/', function(req, res){
res.render('index');
});
io.on("connection", function(client) {
console.log('user connected');
});
io.on("connection", function(client) {
client.on("join", function(name){
console.log("Joined: " + name);
clients[client.id] = name;
client.emit("update", "Você está conectado ao servidor");
client.broadcast.emit("Update! => ", name + "entrou no servidor");
});
client.on("send", function(msg){
console.log("Mensagem: " + msg);
client.broadcast.emit("chat", clients[client.id], msg);
});
client.on("disconnect", function(){
console.log("Disconectado");
io.emmit("Update! => ", clients[client.id] + " saiu do servidor");
delete clients[client.id];
});
});
http.listen(3000, function(){
console.log('Rodando na porta 3000');
});package.json：
{
"name": "diga",
"version": "1.0.0",
"description": "",
"main": "nodemon",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"serve": "nodemon app.js"
},
"repository": {
"type": "git",
"url": ""
},
"author": "juliana",
"license": "ISC",
"dependencies": {
"@types/socket.io": "^1.4.36",
"ejs": "^2.6.1",
"express": "^4.16.3",
"g": "^2.0.1",
"jquery": "^3.3.1",
"socket.io-client": "^2.1.1",
"socketio": "^1.0.0"
},
"devDependencies": {
"nodemon": "^1.17.5"
}
}
回答 2
Stack Overflow用户
发布于 2020-05-24 21:03:10
如果你想获得更多的好处，不要先执行express，如下const express = require(' express ')
获取服务器，const app = express()；
您将使用您的服务器引导应用程序，并快速帮助它提供静态文件，这些文件可以位于任何位置，例如。公共信息如下
Now add all it will look as below
const express = require('express');
const app = express();
app.use(express.static('public'));
app.listen(3000, () => console.log('Its working on port 3000'))```Stack Overflow用户
发布于 2021-01-19 00:00:34
如果上面的例子不起作用，那就试试吧。
const express = require('express');
const app = Royexpress();页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/51125444
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