Question

所以我有一个Node / Express应用程序，它应该是单独客户端应用程序的后端/路由器。每当我在本地对其进行测试时，该应用程序都可以正常运行。但是，每当我将其上传到Heroku并将其托管在此处时，该应用程序要么无法运行，要么崩溃。最初我以为这是由我使用的称为bcrypt的Node模块引起的，所以我将没有它的应用程序重写到一个全新的目录中，创建了一个新的Heroku页面并上传了新页面，但是该应用程序仍然崩溃。没有日志详细说明它为什么在Heroku上崩溃（或者至少我看不到）。我不确定我的代码是否有问题，但是任何建议都将不胜感激。我的应用程序如下：

const express = require('express');
const MongoClient = require('mongodb').MongoClient;
const bodyParser = require('body-parser');
const assert = require('assert');

const dbURI = process.env.MONGODB_URI;
const dbName = 'expresstestdb';
const collName = 'mealPlanner';

const app = express();

MongoClient.connect(dbURI, (err, client)=>{
    if(err) throw err;
    db = client.db(dbName);
    col = db.collection(collName);
});

app.use(bodyParser.urlencoded({extended: true}));

app.use(bodyParser.json());

app.use((req, res, next) => {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});


app.get('/', (req, res)=>{
    res.send('Express app is running');
});


app.post('/login', (req, res) => {  //handles app login 
    let uName = req.body.username;
    let passText = req.body.password;
    let searchObj = {};
    searchObj['username'] = uName;

    col.find(searchObj).toArray((err, result) => {
        if(err) return err;

        if(result.length == 0){
            res.send({"login": false});
        }
        else{
            let hash = result[0].password;
                if(hash == passText){
                    res.send({"login": true, "meals": result[0].meals});
                }
                else{
                    res.send({"login": false});
                }   
        }
    });
});


app.post('/update', (req, res) => {  //handles schedule update
    let uName = req.body.username;
    let mealObj = req.body.meals;
    let searchObj = {};
    let updateObj = {};
    searchObj["username"] = uName;
    updateObj["meals"] = mealObj;

    let updateSched = col.findOneAndUpdate(searchObj, {$set: updateObj}, {
        returnNewDocument: true,
        upsert: true
    }, (err, dbRes) => {
        assert.equal(null, err);

        res.send(true);
    });
});


app.post('/signup', (req, res) => {  //handles new user signup

    let uName = req.body.username;
    let passText = req.body.password;
    let uObj = {}
    uObj["username"] = uName;
    uObj["meals"] = req.body.meals;

    let userFree = col.find(uObj).toArray((err, results) =>{
        if(err) return err;

        let insertBool;
        if(results.length > 0){
            insertBool = false;
            res.send({'openName': false});
        }
        else{
                    uObj['password'] = passText;

                    col.insertOne(uObj, (err, r) => {
                        if(err) return err;
                        assert.equal(1, r.insertedCount);
                        insertBool = true;
                        res.send({'openName': true});
                    });



        }
    });
});

app.listen(process.env.PORT || 5004, () => 
    console.log('app is lisenting on port 5004')
);

节点/快速应用程序在部署到Heroku时崩溃

0 个答案: