Revision 36734f3cef8aba7235e0c3356197ce8cb4bdc5e3 authored by Erik Sundell on 18 October 2022, 07:23:47 UTC, committed by GitHub on 18 October 2022, 07:23:47 UTC
* move hard coded metrics to its own package * remove comment
1 parent 7a71482
ip_address.go
package util
import (
"fmt"
"net"
"strings"
)
type NetworkAddress struct {
Host string
Port string
}
// SplitHostPortDefault splits ip address/hostname string by host and port. Defaults used if no match found
func SplitHostPortDefault(input, defaultHost, defaultPort string) (NetworkAddress, error) {
addr := NetworkAddress{
Host: defaultHost,
Port: defaultPort,
}
if len(input) == 0 {
return addr, nil
}
start := 0
// Determine if IPv6 address, in which case IP address will be enclosed in square brackets
if strings.Index(input, "[") == 0 {
addrEnd := strings.LastIndex(input, "]")
if addrEnd < 0 {
// Malformed address
return addr, fmt.Errorf("malformed IPv6 address: '%s'", input)
}
start = addrEnd
}
if strings.LastIndex(input[start:], ":") < 0 {
// There's no port section of the input
// It's still useful to call net.SplitHostPort though, since it removes IPv6
// square brackets from the address
input = fmt.Sprintf("%s:%s", input, defaultPort)
}
host, port, err := net.SplitHostPort(input)
if err != nil {
return addr, fmt.Errorf("net.SplitHostPort failed for '%s': %w", input, err)
}
if len(host) > 0 {
addr.Host = host
}
if len(port) > 0 {
addr.Port = port
}
return addr, nil
}
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