MERN堆栈部署到heroku,但在初始加载时不提供根服务,仅显示子路由

如何解决MERN堆栈部署到heroku,但在初始加载时不提供根服务,仅显示子路由

我已经创建了一个MERN应用程序,并且正在尝试将其部署到heroku。当我尝试构建应用程序并使用“ heroku local”对其进行测试时,似乎一切正常,本地服务器启动并且数据库连接,但是初始页面“ /”是空白屏幕。但是,如果我输入“ / rankings /”之类的其他路由,它将起作用。

enter image description here

enter image description here

下面是我的快递服务器的副本

// all imports below
const express = require("express");
const mongoose = require('mongoose');
const fileUpload = require("express-fileupload")
const p4pBoxingRankings = require("./p4pBoxingRankings")
const divisionalRankings = require("./divisionalRankings.js")
const ufcP4pRankings = require("./ufcRankings.js")
const ufcDivisionalRankings = require("./ufcDivisionalRankings.js")



let bodyParser = require('body-parser');
let cors = require('cors');

const app = express();
const path = require('path');

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(fileUpload());
app.use(cors());
app.use(express.static('public'));
app.set('port',(process.env.PORT || 8080));
// code to connect datbase below
const URI = process.env.MONGODB_URI || "mongodb+srv://skunk_hunnt:P@cquiaop4p224@cluster0.4cqzd.mongodb.net/Fight_Auction?retryWrites=true&w=majority"
mongoose.connect(URI,{ useNewUrlParser: true })
    .then(() => {
    console.log('Database connected...')
  }).catch((err) => {
    console.log(err);
})


// code to stringify items below
const ItemSchema = new mongoose.Schema({
    itemDescription: { type: String },askingPrice: { type: String },itemDetails: { type: String },pictures: {type: String}
});
const fightItem = mongoose.model('Item',ItemSchema);

// all axios requests below
app.get("/items",function(req,res){
    //make a DB query and send back all the items
    fightItem.find({},(err,data)=>{
        res.send(data)
    })
  })

app.get("/rankings",async(req,res) => {
    res.send(p4pBoxingRankings);    
})

app.get("/rankings/divisions",res) => {
    res.send(divisionalRankings);
})

app.get("/rankings/divisions/ufcp4p",res) => {
    res.send(ufcP4pRankings);
})

app.get("/rankings/divisions/ufcp4p/ufcdivisions",res) => {
    res.send(ufcDivisionalRankings);

})



app.post("/items",res){
      
    let item = new fightItem();
    item.itemDescription = req.body.item.itemDescription
    item.askingPrice = req.body.item.askingPrice
    item.itemDetails = req.body.item.itemDetails
    item.pictures = req.body.item.pictures
    item.save((err,res)=>{
    })

});

app.post('/upload',(req,res) => {
    if (req.files === null) {
      return res.status(400).json({ msg: 'No file uploaded' });
    }
  
    const file = req.files.file;
  
    file.mv(`${__dirname}/public/${file.name}`,err => {
      if (err) {
        console.error(err);
        return res.status(500).send(err);
      }
  
      res.json({ fileName: file.name,filePath: `/public/${file.name}` });
    });
});

// if (process.env.NODE_ENV === 'production') {
//     // Serve any static files
//     app.use(express.static(path.join(__dirname,'build')));
//   // Handle React routing,return all requests to React app
//     app.get('*',res) {
//       res.sendFile(path.join(__dirname,'/build/index.html'));
//     });
//   } 

  app.use("",express.static(path.join(__dirname,'build')));
  // Handle React routing,return all requests to React app
    app.get('*',res) {
        res.sendFile(path.join(__dirname,'/build/index.html'));
    });
   

app.listen(app.get('port'),function() {
    console.log('Server started on port '+app.get('port'));
});

这是我的反应路由器。

import React from "react";
import { BrowserRouter,Route,Switch,} from "react-router-dom";
import BrowseItemsPage from "../components/BrowseItemsPage.jsx";
import HomePage from "../components/HomePage.jsx";
import NewsAndRankings from "../components/NewsAndRankingsPage.jsx";
import NotFoundPage from "../components/NotFoundPage.jsx";
import SellItemPage from "../components/SellItemPage.jsx";




const AppRouter = () => (
    <BrowserRouter>
        <div>
            <Switch>
                <Route path="/" component={HomePage} exact={true}/>
                <Route path="/browse-items" component={BrowseItemsPage}/>
                <Route path="/sell-items" component={SellItemPage}/>
                <Route path="/rankings" component={NewsAndRankings}/>
                <Route component={NotFoundPage}/>
            </Switch>
        </div>
    </BrowserRouter>
    
);

export default AppRouter;茀

版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。

相关推荐


使用本地python环境可以成功执行 import pandas as pd import matplotlib.pyplot as plt # 设置字体 plt.rcParams[&#39;font.sans-serif&#39;] = [&#39;SimHei&#39;] # 能正确显示负号 p
错误1:Request method ‘DELETE‘ not supported 错误还原:controller层有一个接口,访问该接口时报错:Request method ‘DELETE‘ not supported 错误原因:没有接收到前端传入的参数,修改为如下 参考 错误2:cannot r
错误1:启动docker镜像时报错:Error response from daemon: driver failed programming external connectivity on endpoint quirky_allen 解决方法:重启docker -&gt; systemctl r
错误1:private field ‘xxx‘ is never assigned 按Altʾnter快捷键,选择第2项 参考:https://blog.csdn.net/shi_hong_fei_hei/article/details/88814070 错误2:启动时报错,不能找到主启动类 #
报错如下,通过源不能下载,最后警告pip需升级版本 Requirement already satisfied: pip in c:\users\ychen\appdata\local\programs\python\python310\lib\site-packages (22.0.4) Coll
错误1:maven打包报错 错误还原:使用maven打包项目时报错如下 [ERROR] Failed to execute goal org.apache.maven.plugins:maven-resources-plugin:3.2.0:resources (default-resources)
错误1:服务调用时报错 服务消费者模块assess通过openFeign调用服务提供者模块hires 如下为服务提供者模块hires的控制层接口 @RestController @RequestMapping(&quot;/hires&quot;) public class FeignControl
错误1:运行项目后报如下错误 解决方案 报错2:Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project sb 解决方案:在pom.
参考 错误原因 过滤器或拦截器在生效时,redisTemplate还没有注入 解决方案:在注入容器时就生效 @Component //项目运行时就注入Spring容器 public class RedisBean { @Resource private RedisTemplate&lt;String
使用vite构建项目报错 C:\Users\ychen\work&gt;npm init @vitejs/app @vitejs/create-app is deprecated, use npm init vite instead C:\Users\ychen\AppData\Local\npm-
参考1 参考2 解决方案 # 点击安装源 协议选择 http:// 路径填写 mirrors.aliyun.com/centos/8.3.2011/BaseOS/x86_64/os URL类型 软件库URL 其他路径 # 版本 7 mirrors.aliyun.com/centos/7/os/x86
报错1 [root@slave1 data_mocker]# kafka-console-consumer.sh --bootstrap-server slave1:9092 --topic topic_db [2023-12-19 18:31:12,770] WARN [Consumer clie
错误1 # 重写数据 hive (edu)&gt; insert overwrite table dwd_trade_cart_add_inc &gt; select data.id, &gt; data.user_id, &gt; data.course_id, &gt; date_format(
错误1 hive (edu)&gt; insert into huanhuan values(1,&#39;haoge&#39;); Query ID = root_20240110071417_fe1517ad-3607-41f4-bdcf-d00b98ac443e Total jobs = 1
报错1:执行到如下就不执行了,没有显示Successfully registered new MBean. [root@slave1 bin]# /usr/local/software/flume-1.9.0/bin/flume-ng agent -n a1 -c /usr/local/softwa
虚拟及没有启动任何服务器查看jps会显示jps,如果没有显示任何东西 [root@slave2 ~]# jps 9647 Jps 解决方案 # 进入/tmp查看 [root@slave1 dfs]# cd /tmp [root@slave1 tmp]# ll 总用量 48 drwxr-xr-x. 2
报错1 hive&gt; show databases; OK Failed with exception java.io.IOException:java.lang.RuntimeException: Error in configuring object Time taken: 0.474 se
报错1 [root@localhost ~]# vim -bash: vim: 未找到命令 安装vim yum -y install vim* # 查看是否安装成功 [root@hadoop01 hadoop]# rpm -qa |grep vim vim-X11-7.4.629-8.el7_9.x
修改hadoop配置 vi /usr/local/software/hadoop-2.9.2/etc/hadoop/yarn-site.xml # 添加如下 &lt;configuration&gt; &lt;property&gt; &lt;name&gt;yarn.nodemanager.res