nodejs webapp 在本地工作，但不是实时/部署

Question

我的 webapp 在本地工作，但是当我尝试在 Azure Web Apps 上发布它时，会弹出以下错误。 它显示错误：监听 EADDRINUSE：地址已在使用:::8080，但 webapp 应该使用端口 3000。我是创建 webapp 的新手，因此不胜感激。 我使用 Visual Studio 代码按照这些设置发布 web 应用程序 - https://docs.microsoft.com/en-us/azure/developer/javascript/tutorial-vscode-azure-app-service-node-03 。 我选择了 linux 和节点 12 LTS。

谢谢！

#!/usr/bin/env node

/**
 * Module dependencies.
 */

var app = require('../app');
var debug = require('debug')('myapp:server');
var http = require('http');

/**
 * Get port from environment and store in Express.
 */

var port = normalizePort(process.env.PORT || '3000');
app.set('port', port);

/**
 * Create HTTP server.
 */

var server = http.createServer(app);

/**
 * Listen on provided port, on all network interfaces.
 */

server.listen(port);
server.on('error', onError);
server.on('listening', onListening);

/**
 * Normalize a port into a number, string, or false.
 */

function normalizePort(val) {
  var port = parseInt(val, 10);

  if (isNaN(port)) {
    // named pipe
    return val;
  }

  if (port >= 0) {
    // port number
    return port;
  }

  return false;
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError(error) {
  if (error.syscall !== 'listen') {
    throw error;
  }

  var bind = typeof port === 'string'
    ? 'Pipe ' + port
    : 'Port ' + port;

  // handle specific listen errors with friendly messages
  switch (error.code) {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges');
      process.exit(1);
      break;
    case 'EADDRINUSE':
      console.error(bind + ' is already in use');
      process.exit(1);
      break;
    default:
      throw error;
  }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening() {
  var addr = server.address();
  var bind = typeof addr === 'string'
    ? 'pipe ' + addr
    : 'port ' + addr.port;
  debug('Listening on ' + bind);
}

2020-07-16T04:23:44.555179603Z   /  _  \ __________ _________   ____  
2020-07-16T04:23:44.555185003Z  /  /_\  \___   /  |  \_  __ \_/ __ \ 
2020-07-16T04:23:44.555189203Z /    |    \/    /|  |  /|  | \/\  ___/ 
2020-07-16T04:23:44.555193303Z \____|__  /_____ \____/ |__|    \___  >
2020-07-16T04:23:44.555197403Z         \/      \/                  \/ 
2020-07-16T04:23:44.555201303Z A P P   S E R V I C E   O N   L I N U X
2020-07-16T04:23:44.555205203Z 
2020-07-16T04:23:44.555208803Z Documentation: http://aka.ms/webapp-linux
2020-07-16T04:23:44.555212503Z NodeJS quickstart: https://aka.ms/node-qs
2020-07-16T04:23:44.555216303Z NodeJS Version : v12.16.3
2020-07-16T04:23:44.555220003Z Note: Any data outside '/home' is not persisted
2020-07-16T04:23:44.555223903Z 
2020-07-16T04:23:44.902776147Z Found build manifest file at '/home/site/wwwroot/oryx-manifest.toml'. Deserializing it...
2020-07-16T04:23:44.912621757Z Build Operation ID: |bLCEuDLkBSY=.df68a68e_
2020-07-16T04:23:46.477381888Z Writing output script to '/opt/startup/startup.sh'
2020-07-16T04:23:47.136900207Z Running #!/bin/sh
2020-07-16T04:23:47.137528808Z 
2020-07-16T04:23:47.137541508Z # Enter the source directory to make sure the script runs where the user expects
2020-07-16T04:23:47.137547108Z cd "/home/site/wwwroot"
2020-07-16T04:23:47.137551508Z 
2020-07-16T04:23:47.137555608Z export NODE_PATH=$(npm root --quiet -g):$NODE_PATH
2020-07-16T04:23:47.138703711Z if [ -z "$PORT" ]; then
2020-07-16T04:23:47.138716311Z         export PORT=8080
2020-07-16T04:23:47.138721811Z fi
2020-07-16T04:23:47.138725911Z 
2020-07-16T04:23:47.139711413Z echo Found tar.gz based node_modules.
2020-07-16T04:23:47.139723313Z extractionCommand="tar -xzf node_modules.tar.gz -C /node_modules"
2020-07-16T04:23:47.139728913Z echo "Removing existing modules directory from root..."
2020-07-16T04:23:47.139733513Z rm -fr /node_modules
2020-07-16T04:23:47.139737613Z mkdir -p /node_modules
2020-07-16T04:23:47.139741713Z echo Extracting modules...
2020-07-16T04:23:47.141077216Z $extractionCommand
2020-07-16T04:23:47.141089216Z export NODE_PATH="/node_modules":$NODE_PATH
2020-07-16T04:23:47.141094416Z export PATH=/node_modules/.bin:$PATH
2020-07-16T04:23:47.141098616Z if [ -d node_modules ]; then
2020-07-16T04:23:47.142105319Z     mv -f node_modules _del_node_modules || true
2020-07-16T04:23:47.142117019Z fi
2020-07-16T04:23:47.142122019Z 
2020-07-16T04:23:47.142126219Z if [ -d /node_modules ]; then
2020-07-16T04:23:47.142140519Z     ln -sfn /node_modules ./node_modules 
2020-07-16T04:23:47.142145419Z fi
2020-07-16T04:23:47.149224835Z 
2020-07-16T04:23:47.149263335Z echo "Done."
2020-07-16T04:23:47.149334335Z npm start
2020-07-16T04:23:48.155357951Z Found tar.gz based node_modules.
2020-07-16T04:23:48.155942252Z Removing existing modules directory from root...
2020-07-16T04:23:48.164530572Z Extracting modules...
2020-07-16T04:23:51.370781353Z Done.
2020-07-16T04:23:52.204989273Z npm info it worked if it ends with ok
2020-07-16T04:23:52.206185276Z npm info using npm@6.14.4
2020-07-16T04:23:52.206929677Z npm info using node@v12.16.3
2020-07-16T04:23:52.736398696Z npm info lifecycle myapp@0.0.0~prestart: myapp@0.0.0
2020-07-16T04:23:52.746327019Z npm info lifecycle myapp@0.0.0~start: myapp@0.0.0
2020-07-16T04:23:52.759340349Z 
2020-07-16T04:23:52.759356549Z > myapp@0.0.0 start /home/site/wwwroot
2020-07-16T04:23:52.759362549Z > node ./bin/www
2020-07-16T04:23:52.759366849Z 
2020-07-16T04:23:54.160267671Z Express server listening on port 8080
2020-07-16T04:23:54.170115279Z events.js:287
2020-07-16T04:23:54.170141079Z       throw er; // Unhandled 'error' event
2020-07-16T04:23:54.170147979Z       ^
2020-07-16T04:23:54.170152379Z 
2020-07-16T04:23:54.170156779Z Error: listen EADDRINUSE: address already in use :::8080
2020-07-16T04:23:54.170161379Z     at Server.setupListenHandle [as _listen2] (net.js:1313:16)
2020-07-16T04:23:54.170165779Z     at listenInCluster (net.js:1361:12)
2020-07-16T04:23:54.170170179Z     at Server.listen (net.js:1449:7)
2020-07-16T04:23:54.170174479Z     at module.exports (/home/site/wwwroot/routes/table_routes2.js:63:27)
2020-07-16T04:23:54.170178979Z     at Object. (/home/site/wwwroot/app.js:119:37)
2020-07-16T04:23:54.170183679Z     at Module._compile (internal/modules/cjs/loader.js:1133:30)
2020-07-16T04:23:54.170187979Z     at Object.Module._extensions..js (internal/modules/cjs/loader.js:1153:10)
2020-07-16T04:23:54.170192279Z     at Module.load (internal/modules/cjs/loader.js:977:32)
2020-07-16T04:23:54.170196679Z     at Function.Module._load (internal/modules/cjs/loader.js:877:14)
2020-07-16T04:23:54.170200879Z     at Module.require (internal/modules/cjs/loader.js:1019:19)
2020-07-16T04:23:54.170205179Z     at require (internal/modules/cjs/helpers.js:77:18)
2020-07-16T04:23:54.170209379Z     at Object. (/home/site/wwwroot/bin/www:7:11)
2020-07-16T04:23:54.170213779Z     at Module._compile (internal/modules/cjs/loader.js:1133:30)
2020-07-16T04:23:54.170218079Z     at Object.Module._extensions..js (internal/modules/cjs/loader.js:1153:10)
2020-07-16T04:23:54.170231979Z     at Module.load (internal/modules/cjs/loader.js:977:32)
2020-07-16T04:23:54.170236679Z     at Function.Module._load (internal/modules/cjs/loader.js:877:14)
2020-07-16T04:23:54.170240879Z Emitted 'error' event on Server instance at:
2020-07-16T04:23:54.170244979Z     at emitErrorNT (net.js:1340:8)
2020-07-16T04:23:54.170248979Z     at processTicksAndRejections (internal/process/task_queues.js:84:21) {
2020-07-16T04:23:54.170253279Z   code: 'EADDRINUSE',
2020-07-16T04:23:54.170257279Z   errno: 'EADDRINUSE',
2020-07-16T04:23:54.170261279Z   syscall: 'listen',
2020-07-16T04:23:54.170265279Z   address: '::',
2020-07-16T04:23:54.170269379Z   port: 8080
2020-07-16T04:23:54.170273379Z }
2020-07-16T04:23:54.198841600Z npm info lifecycle myapp@0.0.0~start: Failed to exec start script
2020-07-16T04:23:54.200937601Z npm ERR! code ELIFECYCLE
2020-07-16T04:23:54.201865802Z npm ERR! errno 1
2020-07-16T04:23:54.203466603Z npm ERR! myapp@0.0.0 start: `node ./bin/www`
2020-07-16T04:23:54.203976603Z npm ERR! Exit status 1
2020-07-16T04:23:54.204590604Z npm ERR! 
2020-07-16T04:23:54.205116404Z npm ERR! Failed at the myapp@0.0.0 start script.
2020-07-16T04:23:54.211395609Z npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
2020-07-16T04:23:54.346290903Z npm timing npm Completed in 2399ms
2020-07-16T04:23:54.347057103Z 
2020-07-16T04:23:54.347655604Z npm ERR! A complete log of this run can be found in:
2020-07-16T04:23:54.436761954Z npm ERR!     /root/.npm/_logs/2020-07-16T04_23_54_212Z-debug.log

Answer 1

尝试不使用 normalizeport function