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31 lines
580 B
Go
31 lines
580 B
Go
package freeport
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import (
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"net"
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)
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// GetFreePort asks the kernel for a free open port that is ready to use.
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func GetFreePort() (int, error) {
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addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
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if err != nil {
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return 0, err
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}
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l, err := net.ListenTCP("tcp", addr)
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if err != nil {
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return 0, err
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}
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defer l.Close()
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return l.Addr().(*net.TCPAddr).Port, nil
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}
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// GetPort is deprecated, use GetFreePort instead
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// Ask the kernel for a free open port that is ready to use
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func GetPort() int {
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port, err := GetFreePort()
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if err != nil {
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panic(err)
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}
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return port
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}
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