Question

我是Node和npm的新手，目前处于学习阶段。我能够运行服务器和npm启动之前，但我在我的项目目录中上传了一些文件夹后，npm start无法正常运行并且出现了一些错误。我需要帮助来理解我需要在项目中修复什么。

    > workspace@1.0.0 start /home/ubuntu/workspace/nodeproject
> node app.js

events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE :::8080
    at Object.exports._errnoException (util.js:907:11)
    at exports._exceptionWithHostPort (util.js:930:20)
    at Server._listen2 (net.js:1250:14)
    at listen (net.js:1286:10)
    at Server.listen (net.js:1382:5)
    at EventEmitter.listen (/home/ubuntu/workspace/nodeproject/node_modules/express/lib/application.js:617:24)
    at Object.<anonymous> (/home/ubuntu/workspace/nodeproject/app.js:14:5)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)

npm ERR! Linux 4.2.0-c9
npm ERR! argv "/home/ubuntu/.nvm/versions/node/v4.5.0/bin/node" "/home/ubuntu/.nvm/versions/node/v4.5.0/bin/npm" "start"
npm ERR! node v4.5.0
npm ERR! npm  v2.15.9
npm ERR! code ELIFECYCLE
npm ERR! workspace@1.0.0 start: `node app.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the workspace@1.0.0 start script 'node app.js'.
npm ERR! This is most likely a problem with the workspace package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node app.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs workspace
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! 
npm ERR!     npm owner ls workspace
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /home/ubuntu/workspace/nodeproject/npm-debug.log

Answer 1

这不是npm本身的问题。

您已使用端口8080，请尝试将其更改为例如

server.listen(8081)

如果您使用的是osx，请尝试将启动脚本从package.json更改为

env PORT=8081 node app.js

因为你的代码依赖于它。

另一方面，您可以手动设置

var port = 8081
app.listen(port, function(err){ console.log('The server is running on port: '+ port); });

Answer 2

您可以在运行命令期间传递端口，如下所示

export PORT=3000 && npm start

您可以使用3000以外的其他端口以及或，您可能希望更改内部代码，如下所示

var express = require("express");

var app = express();
var port = process.env.PORT | 3000;

app.get('/', function(req, res){
    res.send('Aloha world!');
});
app.get('/routing', function(req, res){
  res.send('Aloha Routing!');
});

app.listen(port, function(err){
  console.log('The server is running on port: '+ port);
});

我刚刚更新了代码中的var port = process.env.PORT | 3000;

现在您可以浏览http://localhost:3000或http://localhost:3000/routing

我希望这可以帮助你:)。

运行应用程序时npm启动错误

2 个答案: