[英]Node.js server running and listening on Port 3000 but Localhost:3000 didn't send any data
因此,服务器正在运行并正在侦听3000端口,据我所知,该端口并未被阻塞,但是当我尝试加载页面时,它会挂起一段时间,然后提供以下消息:
“此页面无法正常运行,localhost没有发送任何数据。ERR_EMPTY_RESPONSE
我不确定为什么即使调整get('/“)主页以使内容变得简单也无法通过,也没有任何错误通过终端,所以我不确定如何诊断问题。
我的app.js代码:
const express = require('express');
const path = require('path');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const expressValidator = require('express-validator');
const flash = require('connect-flash');
const session = require('express-session');
mongoose.connect('mongodb://localhost/nodekb');
let db = mongoose.connection;
// Check connection
db.once('open', function(){
console.log('Connected to MongoDB');
});
// Check for DB errors
db.on('error', function(err){
console.log(err);
});
// Init App
const app = express();
// Bring in Models
let Article = require('./models/article');
// Load View Engine
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');
// Body Parser Middleware
// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: false }));
// parse application/json
app.use(bodyParser.json());
// Set Public Folder
app.use(express.static(path.join(__dirname, 'public')));
// Express Session Middleware
app.use(session({
secret: 'keyboard cat',
resave: true,
saveUninitialized: true
}));
// Express Messages Middleware
app.use(require('connect-flash')());
app.use(function (req, res, next) {
res.locals.messages = require('express-messages')(req, res);
next();
});
// Express Validator Middleware
app.use(expressValidator);
// Home Route
app.get('/', function(req, res){
Article.find({}, function(err, articles){
if(err){
console.log(err);
} else {
res.render('index', {
title:'Articles',
articles: articles
});
}
});
});
// Route Files
let articles = require('./routes/articles');
let users = require('./routes/users');
app.use('/articles', articles);
app.use('/users', users);
app.listen(3000, function(){
console.log("We are running on port 3000");
});
我认为问题是您的查询正在获取空数组 。 我在查询的回调添加条件检查的物品 数组的长度 。
app.get('/', function(req, res){
Article.find({}, function(err, articles){
if(err){
console.log(err);
res.json(err);
}else if(articles.length == 0){
console.log("Articles not found");
res.json({error : "Articles not found"});
} else {
console.log("Articles found");
res.render('index', {
title:'Articles',
articles: articles
});
}
});
});
希望对您有帮助。
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