Node.js应用程序提供ERR_EMPTY_RESPONSE [英] Node.js app giving ERR_EMPTY_RESPONSE

问题描述

我使用Node.js，Express，MongoDB和Mongoose构建的应用程序存在严重问题.昨晚，当我使用nodemon server.js来运行服务器时，一切似乎都可以正常工作.在命令行上，所有内容似乎都可以正常运行，但是在浏览器(特别是Chrome)上，我收到以下错误消息:没有收到数据ERR_EMPTY_RESPONSE.我已经在计算机上尝试了其他Node项目，但它们也都在努力工作.昨晚我做了一次npm更新，以更新我的模块，因为我从MongoDB/Mongoose {[错误:找不到模块'../build/Release/bson']代码:'MODULE_NOT_FOUND'}中收到另一个错误.我在此 answer 中使用了该解决方案来尝试对其进行修复，但并没有不能正常工作，但我仍然收到该错误.现在，我根本没有将任何文件提供给浏览器.我的代码如下.请帮助:

I'm having serious issues with an app I am building with Node.js, Express, MongoDB and Mongoose. Last night everything seemed to work when I used nodemon server.js to `run the server. On the command line everything seems to be working but on the browser (in particular Chrome) I get the following error: No data received ERR_EMPTY_RESPONSE. I've tried other Node projects on my machine and they too are struggling to work. I did a npm update last night in order to update my modules because of another error I was getting from MongoDB/Mongoose { [Error: Cannot find module '../build/Release/bson'] code: 'MODULE_NOT_FOUND'}. I used the solution in this answer to try and fix it and it didn't work and I still get that error. Now I don't get any files at all being served to my browser. My code is below. Please help:

//grab express and Mongoose
var express = require('express');
var mongoose = require('mongoose');
var Schema = mongoose.Schema;

//create an express app
var app = express();

app.use(express.static('/public/css', {"root": __dirname}));

//create a database
mongoose.connect('mongodb://localhost/__dirname');

//connect to the data store on the set up the database
var db = mongoose.connection;

//Create a model which connects to the schema and entries collection in the __dirname database
var Entry = mongoose.model("Entry", new Schema({date: 'date', link: 'string'}), "entries");

mongoose.connection.on("open", function() {
    console.log("mongodb is connected!");
});

//start the server on the port 8080
app.listen(8080);

//The routes

//The route for getting data for the database
app.get("/database", function(req, res) {
    Entry.find({}, function(err, data) {console.log(err, data, data.length); });

});

//The route for posting data on the database
app.post("/database", function(req, res) {
    //test new post
    var newMonth = new Entry({date: '1997-10-30', link: 'https://wwww.youtube.com/'});
        newMonth.save(function(err) {
            if (err !== null) {
                //object was not save
                console.log(err);
                    } else {
                console.log("it was saved!")
        };
    });
});



//create an express route for the home page at http://localhost:8080/
app.get('/', function(req, res) {
    res.send('ok');
    res.sendFile('/views/index.html', {"root": __dirname + ''});
});

//Send a message to the console
console.log('The server has started');

推荐答案

//The route for getting data for the database
app.get("/database", function(req, res) {
    Entry.find({}, function(err, data) {console.log(err, data, data.length); });

});

//The route for posting data on the database
app.post("/database", function(req, res) {
    //test new post
    var newMonth = new Entry({date: '1997-10-30', link: 'https://wwww.youtube.com/'});
        newMonth.save(function(err) {
            if (err !== null) {
                //object was not save
                console.log(err);
                    } else {
                console.log("it was saved!")
        };
    });
});

这些路由不会通过res将任何内容发送回客户端. bson错误没什么大不了的-它只是告诉您它不能使用C ++ bson解析器，而是使用本机JS.

These routes don't send anything back to the client via res. The bson error isn't a big deal - it's just telling you it can't use the C++ bson parser and instead is using the native JS one.

修复可能是:

//The route for getting data for the database
app.get("/database", function(req, res) {
    Entry.find({}, function(err, data) {
        if (err) { 
            res.status(404).json({"error":"not found","err":err});
            return;
        }
        res.json(data);
    });
});

//The route for posting data on the database
app.post("/database", function(req, res) {
    //test new post
    var newMonth = new Entry({date: '1997-10-30', link: 'https://wwww.youtube.com/'});
    newMonth.save(function(err) {
        if (err !== null) {
            res.status(500).json({ error: "save failed", err: err});
            return;
        } else {
            res.status(201).json(newMonth);
        };
    });
});

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