Question

当我在本地工作我的项目时（没有问题），我执行在端口3000上运行的npm start，也必须打开另一个终端，并执行在端口4000上运行的node server / server.js。能够与我的浏览器一起使用来连接我的前端和后端。现在，我正在尝试在heroku上托管该项目，但是没有运气。这是我的错误：

2020-08-26T11:54:23.905587+00:00 heroku[router]: at=error code=H13 desc="Connection closed without response" method=GET path="/" host=whatever.herokuapp.com request_id="whatever" fwd="96.20.56.73" dyno=web.1 connect=1ms service=159ms status=503 bytes=0 protocol=https

和package.json：

    {
  "name": "library",
  "version": "0.1.0",
  "private": true,
  "proxy": "http://localhost:4000",
  "dependencies": {
    "@material-ui/core": "^4.9.9",
    "@material-ui/icons": "^4.9.1",
    "@material-ui/lab": "^4.0.0-alpha.48",
    "@material/react-snackbar": "^0.15.0",
    "@testing-library/jest-dom": "^4.2.4",
    "@testing-library/react": "^9.4.0",
    "@testing-library/user-event": "^7.2.1",
    "chai": "^4.2.0",
    "clsx": "^1.1.0",
    "cookie-parser": "^1.4.4",
    "dotenv": "^8.2.0",
    "google-maps-react": "^2.0.2",
    "hookrouter": "^1.2.3",
    "i18next": "^19.4.1",
    "i18next-browser-languagedetector": "^4.0.2",
    "i18next-xhr-backend": "^3.2.2",
    "immer": "^5.3.6",
    "mongo-seeding": "^3.4.1",
    "mongodb": "^3.5.3",
    "multer": "^1.4.2",
    "react": "^16.12.0",
    "react-dom": "^16.12.0",
    "react-facebook-login": "^4.1.1",
    "react-google-login": "^5.1.1",
    "react-hook-google-maps": "0.0.3",
    "react-i18next": "^11.3.4",
    "react-redux": "^7.1.3",
    "react-router-dom": "^5.1.2",
    "react-scripts": "3.4.0",
    "redux": "^4.0.5",
    "redux-immer": "^1.0.4",
    "sha1": "^1.1.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "mocha --exit",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "devDependencies": {
    "eslint": "^6.8.0",
    "eslint-plugin-node": "^11.1.0",
    "eslint-plugin-react": "^7.19.0",
    "eslint-plugin-react-hooks": "^3.0.0",
    "eslint-plugin-react-redux": "^3.0.3",
    "mocha": "^7.2.0",
    "supertest": "^4.0.2"
  }
}```

是代理的原因吗？还是我的启动脚本错误？还是其他？

Answer 1

我使用的是create-react-app + JSX，所以我不得不打开两个终端，一个用于npm start（在React Server的端口3000上），另一个用于node server.js（对于4000的后端端口），这两个通过我在package.json上的代理进行连接。完成开发后，我要做的就是：

从package.json中删除代理。
npm运行build，它将我所有代码的副本复制到build文件夹中。
app.use("/", express.static("build")); 在我的server.js文件中，以使构建文件夹可供应用访问。
app.all("/*", (req, res) => { res.sendFile(__dirname + "/build/index.html"); });位于server.js的末尾以捕获所有内容。

希望这可以节省您的时间。

Answer 2

我在heroku上部署的方式是：

添加到我添加的后端package.json脚本

"heroku-postbuild": "cd client && npm install && npm install --only=dev --no-shrinkwrap && npm run build"

将以下内容添加到我的server.js中

if (process.env.NODE_ENV === "production") {
  app.use(express.static(path.join(__dirname, "client/build")));
  app.get("*", (request, response) => {
    response.sendFile(path.join(__dirname, "client/build", "index.html"));
  });
}

在这些之后，我只git push heroku master，就部署了它而没有任何问题。

在Heroku上托管React + Node.js应用程序时出现问题

2 个答案: