开发者问题收集

在 heroku 上部署 Nodejs+Express+React+Webpack 应用

2018-11-06
2034
node.js reactjs express heroku webpack

我已经使用 node js、express、webpack、react 和 socket io 制作了一个 web 应用程序，并且我想将其部署在 heroku 上。当我尝试时，我可以访问该网站，但它显示了一条错误消息：

Cannot GET /

这是我的配置： 

    "scripts": {
    "start": "npm run dev",
    "build": "webpack --mode production",
    "client": "webpack-dev-server --mode development --devtool inline-source-map --hot",
    "server": "nodemon src/server/index.js",
    "dev": "concurrently \"npm run server\" \"npm run client\"",
    "heroku-postbuild": "NPM_CONFIG_PRODUCTION=false npm install && npm run build"
  }

在我更改它之前，启动脚本是 node src/server/index.js ，因为我运行 npm run dev 来本地启动我的应用程序。

这是我的存储库： http://git.kamal-allali.fr/kamal/prog_web_5a

这是 heroku 链接： https://fast-earth-60949.herokuapp.com

以下是 heroku 日志：

2018-11-05T21:42:44.984679+00:00 app[web.1]: 1 Built at: 11/05/2018 9:42:44 PM

2018-11-05T21:42:44.984681+00:00 app[web.1]: 1 Asset
Size Chunks Chunk Names

2018-11-05T21:42:44.984683+00:00 app[web.1]: 1 bundle.js 7.42 MiB main [emitted] main

2018-11-05T21:42:44.984685+00:00 app[web.1]: 1 favicon.ico 40.4 KiB [emitted]

2018-11-05T21:42:44.984686+00:00 app[web.1]: 1 index.html 717 bytes [emitted]

2018-11-05T21:42:44.984688+00:00 app[web.1]: 1 Entrypoint main = bundle.js

2018-11-05T21:42:44.984710+00:00 app[web.1]: 1 [./node_modules/loglevel/lib/loglevel.js] 7.68 KiB {main} [built]

2018-11-05T21:42:44.984712+00:00 app[web.1]: 1 [./node_modules/react-dom/index.js] 1.33 KiB {main} [built]

2018-11-05T21:42:44.984713+00:00 app[web.1]: 1 [./node_modules/react/index.js] 190 bytes {main} [built] 2018-11-05T21:42:44.984715+00:00 app[web.1]: 1 [./node_modules/url/url.js] 22.8 KiB {main} [built]

2018-11-05T21:42:44.984718+00:00 app[web.1]: 1 [./node_modules/webpack-dev-server/client/index.js? http://localhost:3000] (webpack)-dev-server/client? http://localhost:3000 7.78 KiB {main} [built]

2018-11-05T21:42:44.984720+00:00 app[web.1]: 1 [./node_modules/webpack-dev-server/client/overlay.js] (webpack)-dev-server/client/overlay.js 3.58 KiB {main} [built]

2018-11-05T21:42:44.984723+00:00 app[web.1]: 1 [0] multi (webpack)-dev-server/client? http://localhost:3000 (webpack)/hot/dev-server.js ./src/client/index.js 52 bytes {main} [built]

2018-11-05T21:42:44.984724+00:00 app[web.1]: 1 [./node_modules/webpack-dev-server/client/socket.js] (webpack)-dev-server/client/socket.js 1.05 KiB {main} [built]

2018-11-05T21:42:44.984726+00:00 app[web.1]: 1 [./node_modules/webpack-dev-server/node_modules/strip-ansi/index.js] (webpack)-dev-server/node_modules/strip-ansi/index.js 161 bytes {main} [built]

2018-11-05T21:42:44.984728+00:00 app[web.1]: 1 [./node_modules/webpack/hot sync ^./log$] (webpack)/hot sync nonrecursive ^./log$ 170 bytes {main} [built]

2018-11-05T21:42:44.984730+00:00 app[web.1]: 1 [./node_modules/webpack/hot/dev-server.js] (webpack)/hot/dev-server.js 1.61 KiB {main} [built]

2018-11-05T21:42:44.984732+00:00 app[web.1]: 1 [./node_modules/webpack/hot/emitter.js] (webpack)/hot/emitter.js 75 bytes {main} [built]

2018-11-05T21:42:44.984733+00:00 app[web.1]: 1 [./node_modules/webpack/hot/log-apply-result.js] (webpack)/hot/log-apply-result.js 1.27 KiB {main} [built]

2018-11-05T21:42:44.984735+00:00 app[web.1]: 1 [./src/client/Layout.js] 4.33 KiB {main} [built]

2018-11-05T21:42:44.984736+00:00 app[web.1]: 1 [./src/client/index.js] 205 bytes {main} [built]

2018-11-05T21:42:44.984738+00:00 app[web.1]: 1 + 349 hidden modules

2018-11-05T21:42:44.984740+00:00 app[web.1]: 1 Child html-webpack-plugin for "index.html":

2018-11-05T21:42:44.984742+00:00 app[web.1]: 1 1 asset

2018-11-05T21:42:44.984743+00:00 app[web.1]: 1 Entrypoint undefined = index.html

2018-11-05T21:42:44.984745+00:00 app[web.1]: 1
[./node_modules/html-webpack-plugin/lib/loader.js!./public/index.html] 828 bytes {0} [built]

2018-11-05T21:42:44.984746+00:00 app[web.1]: 1
[./node_modules/lodash/lodash.js] 527 KiB {0} [built]2018-11-05T21:42:44.984748+00:00 app[web.1]: 1
[./node_modules/webpack/buildin/global.js] (webpack)/buildin/global.js 489 bytes {0} [built]

2018-11-05T21:42:44.984749+00:00 app[web.1]: 1
[./node_modules/webpack/buildin/module.js] (webpack)/buildin/module.js 497 bytes {0} [built]

2018-11-05T21:42:44.984751+00:00 app[web.1]: 1 ℹ ｢wdm｣: Compiled successfully.

2018-11-05T22:16:20.551630+00:00 heroku[web.1]: Idling

2018-11-05T22:16:20.552092+00:00 heroku[web.1]: State changed from up to down

2018-11-05T22:16:21.411951+00:00 heroku[web.1]: Stopping all processes with SIGTERM

2018-11-05T22:16:21.808625+00:00 heroku[web.1]: Process exited with status 143

2018-11-06T08:35:42.000000+00:00 app[api]: Build started by user [email protected]

2018-11-06T08:36:36.888512+00:00 heroku[web.1]: State changed from down to starting

2018-11-06T08:36:36.713630+00:00 app[api]: Deploy d62783d3 by user [email protected]

2018-11-06T08:36:36.713630+00:00 app[api]: Release v12 created by user [email protected]

2018-11-06T08:36:40.000000+00:00 app[api]: Build succeeded

2018-11-06T08:36:42.010068+00:00 heroku[web.1]: Starting process with command npm start

2018-11-06T08:36:45.324322+00:00 app[web.1]:

2018-11-06T08:36:45.324353+00:00 app[web.1]: > [email protected] start /app

2018-11-06T08:36:45.324355+00:00 app[web.1]: > npm run dev

2018-11-06T08:36:45.324356+00:00 app[web.1]:

2018-11-06T08:36:45.753063+00:00 app[web.1]:

2018-11-06T08:36:45.753112+00:00 app[web.1]: > [email protected] dev /app

2018-11-06T08:36:45.753114+00:00 app[web.1]: > concurrently "npm run server" "npm run client"

2018-11-06T08:36:45.753116+00:00 app[web.1]:

2018-11-06T08:36:47.147860+00:00 app[web.1]: 1

2018-11-06T08:36:47.147877+00:00 app[web.1]: 1 > [email protected] client /app

2018-11-06T08:36:47.147879+00:00 app[web.1]: 1 > webpack-dev-server --mode development --devtool inline-source-map --hot

2018-11-06T08:36:47.147881+00:00 app[web.1]: 1

2018-11-06T08:36:47.172481+00:00 app[web.1]: [0]

2018-11-06T08:36:47.172485+00:00 app[web.1]: [0] > [email protected] server /app

2018-11-06T08:36:47.172487+00:00 app[web.1]: [0] > nodemon src/server/index.js

2018-11-06T08:36:47.172488+00:00 app[web.1]: [0]

2018-11-06T08:36:47.672353+00:00 app[web.1]: [0] [nodemon] 1.18.4

2018-11-06T08:36:47.673281+00:00 app[web.1]: [0] [nodemon] to restart at any time, enter rs

2018-11-06T08:36:47.673747+00:00 app[web.1]: [0] [nodemon] watching: /app/src/server/**/*

2018-11-06T08:36:47.674424+00:00 app[web.1]: [0] [nodemon] starting node src/server/index.js

2018-11-06T08:36:47.963706+00:00 app[web.1]: [0] Listening on port 45437

2018-11-06T08:36:48.299567+00:00 heroku[web.1]: State changed from starting to up

2018-11-06T08:36:48.679674+00:00 app[web.1]: 1 clean-webpack-plugin: /app/dist has been removed.

2018-11-06T08:36:48.905698+00:00 app[web.1]: 1 ℹ ｢wds｣: Project is running at http://localhost:3000/

2018-11-06T08:36:48.906031+00:00 app[web.1]: 1 ℹ ｢wds｣: webpack output is served from /

2018-11-06T08:36:48.956210+00:00 app[web.1]: 1 ⚠ ｢wds｣: Unable to open browser. If you are running in a headless environment, please do not use the --open flag

2018-11-06T08:36:55.276089+00:00 heroku[router]: at=info method=GET path="/" host=fast-earth-60949.herokuapp.com request_id=2474b83b-65ce-43b4-a54f-6851d5f55a7c fwd="78.112.168.129" dyno=web.1 connect=0ms service=9ms status=404 bytes=360 protocol=https

2018-11-06T08:36:57.303048+00:00 app[web.1]: 1 ℹ ｢wdm｣: Hash: 6de9947fac0c16b70883

2018-11-06T08:36:57.303058+00:00 app[web.1]: 1 Version: webpack 4.19.1

2018-11-06T08:36:57.303061+00:00 app[web.1]: 1 Time: 8512ms

2018-11-06T08:36:57.303063+00:00 app[web.1]: 1 Built at: 11/06/2018 8:36:57 AM

2018-11-06T08:36:57.303066+00:00 app[web.1]: 1 Asset
Size Chunks Chunk Names

2018-11-06T08:36:57.303069+00:00 app[web.1]: 1 bundle.js 7.42 MiB main [emitted] main

2018-11-06T08:36:57.303071+00:00 app[web.1]: 1 favicon.ico 40.4 KiB [emitted]

2018-11-06T08:36:57.303073+00:00 app[web.1]: 1 index.html 717 bytes [emitted]

2018-11-06T08:36:57.303074+00:00 app[web.1]: 1 Entrypoint main = bundle.js

2018-11-06T08:36:57.303077+00:00 app[web.1]: 1 [./node_modules/loglevel/lib/loglevel.js] 7.68 KiB {main} [built]

2018-11-06T08:36:57.303078+00:00 app[web.1]: 1 [./node_modules/react-dom/index.js] 1.33 KiB {main} [built]

2018-11-06T08:36:57.303080+00:00 app[web.1]: 1 [./node_modules/react/index.js] 190 bytes {main} [built] 2018-11-06T08:36:57.303082+00:00 app[web.1]: 1 [./node_modules/url/url.js] 22.8 KiB {main} [built]

2018-11-06T08:36:57.303084+00:00 app[web.1]: 1 [./node_modules/webpack-dev-server/client/index.js? http://localhost:3000] (webpack)-dev-server/client? http://localhost:3000 7.78 KiB {main} [built]

2018-11-06T08:36:57.303087+00:00 app[web.1]: 1 [./node_modules/webpack-dev-server/client/overlay.js] (webpack)-dev-server/client/overlay.js 3.58 KiB {main} [built]

2018-11-06T08:36:57.303090+00:00 app[web.1]: 1 [0] multi (webpack)-dev-server/client? http://localhost:3000 (webpack)/hot/dev-server.js ./src/client/index.js 52 bytes {main} [built]

2018-11-06T08:36:57.303091+00:00 app[web.1]: 1 [./node_modules/webpack-dev-server/client/socket.js] (webpack)-dev-server/client/socket.js 1.05 KiB {main} [built]

2018-11-06T08:36:57.303093+00:00 app[web.1]: 1 [./node_modules/webpack-dev-server/node_modules/strip-ansi/index.js] (webpack)-dev-server/node_modules/strip-ansi/index.js 161 bytes {main} [built]

2018-11-06T08:36:57.303095+00:00 app[web.1]: 1 [./node_modules/webpack/hot sync ^./log$] (webpack)/hot sync nonrecursive ^./log$ 170 bytes {main} [built]

2018-11-06T08:36:57.303099+00:00 app[web.1]: 1 [./node_modules/webpack/hot/dev-server.js] (webpack)/hot/dev-server.js 1.61 KiB {main} [built]

2018-11-06T08:36:57.303100+00:00 app[web.1]: 1 [./node_modules/webpack/hot/emitter.js] (webpack)/hot/emitter.js 75 bytes {main} [built]

2018-11-06T08:36:57.303102+00:00 app[web.1]: 1 [./node_modules/webpack/hot/log-apply-result.js] (webpack)/hot/log-apply-result.js 1.27 KiB {main} [built]

2018-11-06T08:36:57.303104+00:00 app[web.1]: 1 [./src/client/Layout.js] 4.33 KiB {main} [built]

2018-11-06T08:36:57.303106+00:00 app[web.1]: 1 [./src/client/index.js] 205 bytes {main} [built]

2018-11-06T08:36:57.303108+00:00 app[web.1]: 1 + 349 hidden modules

2018-11-06T08:36:57.303109+00:00 app[web.1]: 1 Child html-webpack-plugin for "index.html":

2018-11-06T08:36:57.303111+00:00 app[web.1]: 1 1 asset

2018-11-06T08:36:57.303113+00:00 app[web.1]: 1 Entrypoint undefined = index.html

2018-11-06T08:36:57.303115+00:00 app[web.1]: 1
[./node_modules/html-webpack-plugin/lib/loader.js!./public/index.html] 828 bytes {0} [built]

2018-11-06T08:36:57.303116+00:00 app[web.1]: 1
[./node_modules/lodash/lodash.js] 527 KiB {0} [built]2018-11-06T08:36:57.303118+00:00 app[web.1]: 1
[./node_modules/webpack/buildin/global.js] (webpack)/buildin/global.js 489 bytes {0} [built]

2018-11-06T08:36:57.303119+00:00 app[web.1]: 1
[./node_modules/webpack/buildin/module.js] (webpack)/buildin/module.js 497 bytes {0} [built]

2018-11-06T08:36:57.303457+00:00 app[web.1]: 1 ℹ ｢wdm｣: Compiled successfully.

2个回答

您需要将您的节点版本添加到您的 package.json 中。

示例： 

  "engines": {
    "node": "10.11.0"
  }

我在评论中回答了，但这不是最好的方法，所以我将在这里进行编辑。

由于您尝试提供静态内容，请尝试使用静态中间件。

删除 

app.get('*', (req,res) =>{
    res.sendFile(path.join(__dirname,'../../public/index.html'));
});

并添加 

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

第二次编辑。

您需要构建项目并提供文件夹，通常是 dist 或 build 文件夹。

为此，您有几个选项，一个是在将更改发布到 heroku 之前构建项目，但它可能会有点乏味。

另一个选项是执行 postinstall 脚本，因此在 heroku 执行 npm install 之后，将构建项目并使用最新的创建 dist 或 build 文件夹更改。 

"postinstall": "npm run build"

如果您不想每次执行 npm install 时都运行脚本，您可以在 heroku 中使用 if-env 和环境变量。 

"postinstall": "if-env NODE_ENV=production && npm run build"

一旦您知道构建时要创建哪个文件夹，请更改下一行。 

app.use(express.static(path.join(__dirname,'path to the folder with the prod build')));
Rodrigo Martín de Lamo
2018-11-06

如果没有 Heroku 日志，这有点像是猜测...但是

无法获取 / - 意味着 express 没有响应路径..

Heroku 使用 express 为 NodeJs 提供服务，错误应该就在这里

从检查 server/index.js 中的代码来看，您使用的是 path 包，但忘记导入它了 :) 

const path = require('path');

修复该问题后，您还需要添加一个条件以访问 DIST 文件夹而不是公共文件夹（因为您将为 DIST 文件夹提供服务） 

if (process.env.NODE_ENV === 'production') {
    app.use(express.static(path.join(__dirname, 'build')));
    app.get('*', function (req, res) {
        res.sendFile(path.join(__dirname, 'build', 'index.html'));
    });
}

* 还要检查 dist 是否正在加载并且不在 .gitignore

祝你好运！

Omer lavi
2018-11-06