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18 lines
480 B
JavaScript
18 lines
480 B
JavaScript
import net from 'node:net'
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export function findAvailableHostedLoopbackPort() {
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return new Promise((resolve, reject) => {
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const server = net.createServer()
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server.unref()
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server.once('error', reject)
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server.listen({ host: '127.0.0.1', port: 0 }, () => {
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const address = server.address()
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server.close(() =>
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typeof address === 'object' && address
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? resolve(address.port)
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: reject(new Error('No port'))
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)
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})
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})
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}
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