67 lines
1.3 KiB
Go
67 lines
1.3 KiB
Go
package conf
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import (
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"encoding/json"
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"fmt"
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"net"
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"sort"
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"strings"
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)
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// IPsOrCIDRs is a parameter that contains a list of IPs or CIDRs.
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type IPsOrCIDRs []fmt.Stringer
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// MarshalJSON implements json.Marshaler.
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func (d IPsOrCIDRs) MarshalJSON() ([]byte, error) {
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out := make([]string, len(d))
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for i, v := range d {
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out[i] = v.String()
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}
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sort.Strings(out)
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return json.Marshal(out)
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}
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// UnmarshalJSON implements json.Unmarshaler.
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func (d *IPsOrCIDRs) UnmarshalJSON(b []byte) error {
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var in []string
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if err := json.Unmarshal(b, &in); err != nil {
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return err
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}
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*d = nil
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if len(in) == 0 {
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return nil
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}
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for _, t := range in {
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if _, ipnet, err := net.ParseCIDR(t); err == nil {
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*d = append(*d, ipnet)
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} else if ip := net.ParseIP(t); ip != nil {
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*d = append(*d, ip)
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} else {
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return fmt.Errorf("unable to parse IP/CIDR '%s'", t)
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}
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}
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return nil
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}
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// UnmarshalEnv implements envUnmarshaler.
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func (d *IPsOrCIDRs) UnmarshalEnv(s string) error {
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byts, _ := json.Marshal(strings.Split(s, ","))
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return d.UnmarshalJSON(byts)
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}
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// ToTrustedProxies converts IPsOrCIDRs into a string slice for SetTrustedProxies.
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func (d *IPsOrCIDRs) ToTrustedProxies() []string {
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ret := make([]string, len(*d))
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for i, entry := range *d {
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ret[i] = entry.String()
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}
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return ret
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}
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