Question

我已经使用localhost:5000在heroku local web上成功运行MEAN应用，并且运行正常。使用云部署，它可以正常工作，并显示应用程序错误消息。

server.js:

> `var express=require('express');
var path= require('path');
var bodyParser=require('body-parser');`enter code here`
var cors=require('cors');

var tasks=require('./routes/tasks');

var app=express();

var port=process.env.port || 3000;

app.use(cors());

//Static folder
app.use(express.static(path.join(__dirname,'public')));

//Body parser middle-ware
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended:false}));

app.use('/api',tasks);
app.use('/**',(request,response,next)=>{
    response.status(404);
    response.send('Not Found');
    //response.sendFile(__dirname + '/public/Notfound/notfound.html');
});


app.listen(port,()=>{
    console.log('The server is running on port ' + port);
});

----------------------
here is  routes/tasks.js

var express = require('express');
var router = express.Router();

router.get('/',(request,response,next)=>{
    response.send('Index Page');
});

module.exports=router;

===============================================================
opening from local redirects me to http://localhost:5000/tasks  as per routes/tasks.js 
but the cloud version does not work, I tried to read the console but in vain

Thank you

Answer 1

当我将def ternarySearch(f, left, right, absolutePrecision): ''' left and right are the current bounds; the maximum is between them ''' if abs(right - left) < absolutePrecision: return (left + right)/2 leftThird = (2*left + right)/3 rightThird = (left + 2*right)/3 if f(leftThird) < f(rightThird): return ternarySearch(f, leftThird, right, absolutePrecision) else: return ternarySearch(f, left, rightThird, absolutePrecision)替换为port时，使用Heroku可以正常运行，但是在本地仍然可以将其保留为PORT

在Heroku上发布时出现应用程序错误

1 个答案: