isIpv4 property
bool?
isIpv4
Checks whether the String is valid IPv4.
Example 1
String foo = '192.168.1.14';
bool isIpv4 = foo.isIpv4; // returns true
Example 2
String foo = '192.168.1.14.150.1225';
bool isIpv4 = foo.isIpv4; // returns false
Implementation
bool? get isIpv4 {
if (this == null) return null;
if (this!.isEmpty) return false;
final regex = RegExp(
r'((?:^|\s)([a-z]{3,6}(?=://))?(://)?((?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.(?:25[0-5]|2[0-4]\d|[01]?\d\d?))(?::(\d{2,5}))?(?:\s|$))',
);
return regex.hasMatch(this!);
}