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21 lines
611 B
21 lines
611 B
4 years ago
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/**
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* Parse a string as a port number. Non-integers or invalid ports will
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* result in an error being thrown.
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*
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* @param {String} portString - The string to parse as a port number
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* @returns {number} The parsed port number
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*/
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function parsePort(portString) {
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const port = Number(portString)
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if (!Number.isInteger(port)) {
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throw new Error(`Port '${portString}' is invalid; must be an integer`)
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} else if (port < 0 || port > 65535) {
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throw new Error(
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`Port '${portString}' is out of range; must be between 0 and 65535 inclusive`,
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)
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}
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return port
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}
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module.exports = { parsePort }
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