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33 lines
660 B
Go
33 lines
660 B
Go
package connection
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import (
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"errors"
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"fmt"
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"net"
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"strings"
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)
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// IsPortAvailable returns true if there's no listeners on a given port
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func IsPortAvailable(port int) bool {
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conn, err := net.Dial("tcp", fmt.Sprintf("127.0.0.1:%v", port))
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if err != nil {
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if strings.Index(err.Error(), "connection refused") > 0 {
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return true
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}
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return false
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}
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conn.Close()
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return false
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}
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// FindAvailablePort returns the first available TCP port in the range
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func FindAvailablePort(start int, limit int) (int, error) {
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for i := start; i <= (start + limit); i++ {
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if IsPortAvailable(i) {
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return i, nil
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}
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}
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return -1, errors.New("No available port")
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}
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