如何使用 Windows 中的某些预定义端口从 cmd 运行 node.js 应用程序

Question

Is it some command exist to run my node.js code with directly specified port? something like node server.js port=7777 ?

my server.js code looks like this

http.createServer(function (req, res) {
  if (mount(req, res)) return;
}).listen(process.env.PORT || 80);

Answer 1

Depending on what server.js contains you should be able to do so.

At a minimum you should read port (you could use https://github.com/substack/node-optimist )

var argv = require('optimist').argv;
console.log(argv.port);

// use it like this
$ node server.js -port 7777

and then listen to it on your server (this depends on what lib you're using).

Run the server like this

export PORT=7777; node server.js

Answer 2

A simple adding to Alberto's answer. On Windows machine you haven't export command in cmd , use set instead. Then the whole script will be looks like this:

set PORT=7777
node server.js

Note that the syntax in PowerShell is slightly different:

$env:PORT=7777
node server.js

Answer 3

for linux export PORT=5000; node index.js

for windows set PORT=5000; node index.js

in case of powerShell

set $env:PORT=5000; node index.js

const port = process.env.PORT || 3000; app.listen(port,()=>{console.log( Listening on port ${port} )})

Answer 4

On ubuntu I just do

PORT=7777 node .

in commandline, no set or export needed.