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74 lines
1.7 KiB
74 lines
1.7 KiB
# node-portfinder [](https://github.com/http-party/node-portfinder/actions/workflows/ci.yml)
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## Installation
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``` bash
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$ npm install portfinder
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```
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## Usage
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The `portfinder` module has a simple interface:
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``` js
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var portfinder = require('portfinder');
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portfinder.getPort(function (err, port) {
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//
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// `port` is guaranteed to be a free port
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// in this scope.
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//
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});
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```
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Or with promise (if `Promise`s are supported) :
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``` js
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const portfinder = require('portfinder');
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portfinder.getPortPromise()
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.then((port) => {
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//
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// `port` is guaranteed to be a free port
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// in this scope.
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//
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})
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.catch((err) => {
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//
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// Could not get a free port, `err` contains the reason.
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//
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});
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```
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If `portfinder.getPortPromise()` is called on a Node version without Promise (<4), it will throw an Error unless [Bluebird](http://bluebirdjs.com/docs/getting-started.html) or any Promise pollyfill is used.
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### Ports search scope
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By default `portfinder` will start searching from `8000` and scan until maximum port number (`65535`) is reached.
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You can change this globally by setting:
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```js
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portfinder.setBasePort(3000); // default: 8000
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portfinder.setHighestPort(3333); // default: 65535
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```
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or by passing optional options object on each invocation:
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```js
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portfinder.getPort({
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port: 3000, // minimum port
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stopPort: 3333 // maximum port
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}, callback);
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```
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## Run Tests
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``` bash
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$ npm test
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```
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#### Author: [Charlie Robbins][0]
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#### Author/Maintainer: [Erik Trom][1]
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#### License: MIT/X11
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[0]: http://nodejitsu.com
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[1]: https://github.com/eriktrom
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