happn-tcp-port-used
Advanced tools
A simple Node.js module to check if a TCP port is already bound.
A simple Node.js module to check if a TCP port is currently in use. It returns a deferred promise from the q library.
npm install tcp-port-used
To check a port's state:
var tcpPortUsed = require('tcp-port-used');
tcpPortUsed.check(44201, '127.0.0.1')
.then(function(inUse) {
console.log('Port 44201 usage: '+inUse);
}, function(err) {
console.error('Error on check:', err.message);
});
To wait until a port on localhost is available:
tcpPortUsed.waitUntilFree(44203, 500, 4000)
.then(function() {
console.log('Port 44203 is now free.');
}, function(err) {
console.log('Error:', err.message);
});
To wait until a port on a host is available:
tcpPortUsed.waitUntilFreeOnHost(44203, 'some.host.com', 500, 4000)
.then(function() {
console.log('Port 44203 on some.host.com is now free.');
}, function(err) {
console.log('Error:', err.message);
});
To wait until a port on localhost is accepting connections:
tcpPortUsed.waitUntilUsed(44204, 500, 4000)
.then(function() {
console.log('Port 44204 is now in use.');
}, function(err) {
console.log('Error:', err.message);
});
To wait until a port on a host is accepting connections:
tcpPortUsed.waitUntilUsedOnHost(44204, 'some.host.com', 500, 4000)
.then(function() {
console.log('Port 44204 on some.host.com is now in use.');
}, function(err) {
console.log('Error:', err.message);
});
To wait until a port on a host is in specific state:
var inUse = true; // wait until the port is in use
tcpPortUsed.waitForStatus(44204, 'some.host.com', inUse, 500, 4000)
.then(function() {
console.log('Port 44204 on some.host.com is now in use.');
}, function(err) {
console.log('Error:', err.message);
});
Checks if a TCP port is in use by attempting to connect to the port on host.
If no host is specified, the module uses '127.0.0.1' (localhost). When the
promise is resolved, there is a parameter inUse, when true means the port is
in use and false means the port is free.
Parameters:
Returns:
Object A deferred promise from the q module.
Returns a deferred promise and fulfills it only when the localhost socket is free. Will retry on an interval specified in retryTimeMs until the timeout. If not defined the retryTime is 200 ms and the timeout is 2000 ms.
Parameters:
Returns:
Object A deferred promise from the q module.
Returns a deferred promise and fulfills it only when the localhost socket is free. Will retry on an interval specified in retryTimeMs until the timeout. If not defined the retryTime is 200 ms and the timeout is 2000 ms. If the host is not defined, the modules uses the default '127.0.0.1'.
Parameters:
Returns:
Object A deferred promise from the q module.
Returns a deferred promise and fulfills it only when the socket is accepting connections. Will retry on an interval specified in retryTimeMs until the timeout. If the host is not defined the retryTime is 200 ms and the timeout is 2000 ms.
Parameters:
Returns:
Object A deferred promise from the q module.
Returns a deferred promise and fulfills it only when the socket is accepting connections. Will retry on an interval specified in retryTimeMs until the timeout. If not defined the retryTime is 200 ms and the timeout is 2000 ms. If the host is not defined the module uses the default '127.0.0.1'.
Parameters:
Returns:
Object A deferred promise from the q module.
Waits until the port on host matches the boolean status in terms of use. If the status is true, the promise defers until the port is in use. If the status is false the promise defers until the port is free. If the host is undefined or null, the module uses the default '127.0.0.1'. Also, if not defined the retryTime is 200 ms and the timeout is 2000 ms.
Parameters:
Returns:
Object A deferred promise from the q module.
The MIT License (MIT)
Copyright (c) 2013 jut-io
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
FAQs
A simple Node.js module to check if a TCP port is already bound.
We found that happn-tcp-port-used demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
In this segment of the Risky Business podcast, Feross Aboukhadijeh and Patrick Gray discuss the challenges of tracking malware discovered in open source softare.
Research
Security News
A threat actor's playbook for exploiting the npm ecosystem was exposed on the dark web, detailing how to build a blockchain-powered botnet.
Security News
NVD’s backlog surpasses 20,000 CVEs as analysis slows and NIST announces new system updates to address ongoing delays.