Expressjs +mongoose – 这个网页不可用？

为什么mongoose崩溃expressjs网站？

以下是我的代码：

var express = require('express'); var mongoose = require('mongoose'); var app = express(); // Connect to mongodb mongoose.connect("mongodb://localhost/testdb", function(err) { if (err) throw err; console.log("Successfully connected to mongodb"); // Start the application after the database connection is ready app.listen(3000); console.log("Listening on port 3000"); }); // With Mongoose, everything is derived from a Schema. Let's get a reference to it and define our users. var userSchema = mongoose.Schema({ name: String, username: { type: String, required: true, unique: true }, password: { type: String, required: true }, admin: Boolean, location: String, meta: { age: Number, website: String }, created_at: Date, updated_at: Date }); // The next step is compiling our schema into a Model. var User = mongoose.model('User', userSchema); // Set route. app.get("/", function(req, res) { // We can access all of the user documents through our User model. User.find(function (err, users) { if (err) return console.error(err); console.log(users); }) }); 

我在浏览器中得到这个：

 This webpage is not available 

但在我的terminal，我得到的结果是：

 Successfully connected to mongodb Listening on port 3000 [ { _id: 57682f69feaf405c51fdf144, username: 'testuser1', email: '[e-mail]' }, { _id: 57683009feaf405c51fdf145, username: 'testuser2', email: '[e-mail]' }, { _id: 57683009feaf405c51fdf146, username: 'testuser3', email: '[e-mail]' }] 

任何想法，我已经错过了？

Answer 1

问题在于你没有在请求处理程序中的响应对象中写任何东西。 因此，浏览器一直等待请求完成，并以超时结束。 在你的app.get（）中，你可以像这样更新响应：

 // Set route. app.get("/", function(req, res) { // We can access all of the user documents through our User model. User.find(function (err, users) { if (err) { console.error(err); // some simple error handling, maybe form a proper error object for response. res.status(500).json(err); } console.log(users); res.status(200).json(users); // setting the object as json response //OR // res.end(); if you don't want to send anything to the client }) }); 

或类似的东西。

有关更多详细信息，请参阅Express文档： http ： //expressjs.com/en/api.html#res