+// StringToIPHookFunc returns a DecodeHookFunc that converts
+// strings to net.IP
+func StringToIPHookFunc() DecodeHookFunc {
+ return func(
+ f reflect.Type,
+ t reflect.Type,
+ data interface{}) (interface{}, error) {
+ if f.Kind() != reflect.String {
+ return data, nil
+ }
+ if t != reflect.TypeOf(net.IP{}) {
+ return data, nil
+ }
+
+ // Convert it by parsing
+ ip := net.ParseIP(data.(string))
+ if ip == nil {
+ return net.IP{}, fmt.Errorf("failed parsing ip %v", data)
+ }
+
+ return ip, nil
+ }
+}
+
+// StringToIPNetHookFunc returns a DecodeHookFunc that converts
+// strings to net.IPNet
+func StringToIPNetHookFunc() DecodeHookFunc {
+ return func(
+ f reflect.Type,
+ t reflect.Type,
+ data interface{}) (interface{}, error) {
+ if f.Kind() != reflect.String {
+ return data, nil
+ }
+ if t != reflect.TypeOf(net.IPNet{}) {
+ return data, nil
+ }
+
+ // Convert it by parsing
+ _, net, err := net.ParseCIDR(data.(string))
+ return net, err
+ }
+}
+
+// StringToTimeHookFunc returns a DecodeHookFunc that converts
+// strings to time.Time.
+func StringToTimeHookFunc(layout string) DecodeHookFunc {
+ return func(
+ f reflect.Type,
+ t reflect.Type,
+ data interface{}) (interface{}, error) {
+ if f.Kind() != reflect.String {
+ return data, nil
+ }
+ if t != reflect.TypeOf(time.Time{}) {
+ return data, nil
+ }
+
+ // Convert it by parsing
+ return time.Parse(layout, data.(string))
+ }
+}
+
+// WeaklyTypedHook is a DecodeHookFunc which adds support for weak typing to
+// the decoder.
+//
+// Note that this is significantly different from the WeaklyTypedInput option
+// of the DecoderConfig.