nodejs检查端口是否被占用
const net = require('net')
const portUsed = (port) => {
return new Promise((resolve, reject) => {
let server = net.createServer().listen(port)
server.on('listening', function () {
server.close()
resolve(port)
})
server.on('error', function (err) {
if (err.code == 'EADDRINUSE') {
resolve(err)
}
})
})
}
const tryUsePort = async function (port, portAvailableCallback) {
let res = await portUsed(port)
if (res instanceof Error) {
console.log(`端口:${port}被占用`)
port++
tryUsePort(port, portAvailableCallback)
} else {
portAvailableCallback(port)
return port
}
}
const choosePort = ({ port }) => {
return new Promise((resolve, reject) => {
tryUsePort(port, function (port) {
// do something ...
console.log(`端口:${port}可用`)
// net.createServer().listen(port);
resolve(port)
})
})
}
module.exports = {
choosePort
}
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