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| Current File : //proc/self/root/home/saurabh/.npm/_npx/249ca9fcd30c476a/node_modules/freeport-async/index.js |
const net = require("net");
const DEFAULT_PORT_RANGE_START = 11000;
function testPortAsync(port, hostname) {
return new Promise(function(fulfill, reject) {
var server = net.createServer();
server.listen({ port: port, host: hostname }, function(err) {
server.once("close", function() {
setTimeout(() => fulfill(true), 0);
});
server.close();
});
server.on("error", function(err) {
setTimeout(() => fulfill(false), 0);
});
});
}
async function availableAsync(port, options = {}) {
const hostnames =
options.hostnames && options.hostnames.length ? options.hostnames : [null];
for (const hostname of hostnames) {
if (!(await testPortAsync(port, hostname))) {
return false;
}
}
return true;
}
function freePortRangeAsync(rangeSize, rangeStart, options = {}) {
rangeSize = rangeSize || 1;
return new Promise((fulfill, reject) => {
var lowPort = rangeStart || DEFAULT_PORT_RANGE_START;
var awaitables = [];
for (var i = 0; i < rangeSize; i++) {
awaitables.push(availableAsync(lowPort + i, options));
}
return Promise.all(awaitables).then(function(results) {
var ports = [];
for (var i = 0; i < results.length; i++) {
if (!results[i]) {
return freePortRangeAsync(
rangeSize,
lowPort + rangeSize,
options
).then(fulfill, reject);
}
ports.push(lowPort + i);
}
fulfill(ports);
});
});
}
async function freePortAsync(rangeStart, options = {}) {
const result = await freePortRangeAsync(1, rangeStart, options);
return result[0];
}
module.exports = freePortAsync;
module.exports.availableAsync = availableAsync;
module.exports.rangeAsync = freePortRangeAsync;
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