启动我的电脑后出现“ECONNREFUSED”错误。 我正在使用一个快速服务器，我试图看到我可以提出请求

我正在做一个项目，我已经播种了一些数据。 但是，当我尝试对我的本地主机做任何请求时，我得到这个错误：

// 20170624132844 // http://localhost:4310/campuses { "code": "ECONNREFUSED", "errno": "ECONNREFUSED", "syscall": "connect", "address": "127.0.0.1", "port": 5432 } 

我的要求是在我重新启动我的电脑之前，不知道这里发生了什么。 有人可以请解释什么错误意味着如何处理它。 我在这里包括我的app.js代码以防万一。

 'use strict'; if(process.env.NODE_ENV !== 'production'){ require('dotenv').config(); } //use npm install cors - this stands for Cross- origin resouce sharing const express = require('express'); const app = express(), bunyanLogger = require('express-bunyan-logger'); const PORT = process.env.PORT; const cors = require('cors'); const path = require('path'); const bodyParser = require('body-parser'); const passport = require('passport'); const jwt = require('jsonwebtoken'); const cookieParser = require('cookie-parser'); const Bunyan = require('bunyan'); const compress = require('compression'); const cohortsRoute = require('./routes/cohorts'); const campusesRoute = require('./routes/campuses'); const usersRoute = require('./routes/users'); const skills = require('./routes/skills'); const morgan = require('morgan'); switch (app.get('env')) { case 'development': app.use(morgan('dev')); break; case 'production': app.use(morgan('short')); break; default: } app.use(bodyParser.json()); app.use(express.static(path.join('public'))); // app.use('/api/authenticate', authenticateController.authenticate)//from video tutorial. //other modules that might need to be required later // const users = require('./routes/users'); // const admin = require('./routes/admin'); // const cohorts = require('./routes/cohorts');// already up there. // const campus = require('./routes/campus'); // const projects = require('./routes/projects') // const skills = require('./routes/skills'); // const profile = require('./routes/profile'); // app.use(users) app.use(campusesRoute); app.use(cohortsRoute); app.use(usersRoute); // app.use(campus) // app.use(projects) app.use(skills) app.use((req, res) => { res.sendStatus(404); }); app.get('/', function(req, res) { res.send('Hello World, Ivonne at work here'); res.send(path.resolve(__dirname, 'buil')) }); app.listen(PORT, () => { if(app.get('env') !== 'test'){ console.log(`Galvanize Connect server listening on port ${PORT}`); } }); module.exports = app;