Function hostname 

pub fn hostname(host: &str) -> Result<()>

Validate a hostname.

Validation Rules

• Hostname must not be empty
• Hostname must not exceed MAX_HOSTNAME_LENGTH (253 characters per RFC 1035)
• Each label (between dots) must be 1-63 characters
• Labels can only contain letters, digits, and hyphens
• Labels cannot start or end with a hyphen
• IP addresses (v4 and v6) are allowed

Examples

use geode_client::validate;

assert!(validate::hostname("localhost").is_ok());
assert!(validate::hostname("geode.example.com").is_ok());
assert!(validate::hostname("192.168.1.1").is_ok());
assert!(validate::hostname("::1").is_ok());
assert!(validate::hostname("").is_err());