fixed parse failure for subdomains on parse_host function (#369)

rpc/wrpc/client/src/parse.rs

@@ -136,7 +136,7 @@ pub fn parse_host(input: &str) -> Result<ParseHostOutput, ParseHostError> {
     let does_not_end_with_hyphen = !host.ends_with('-');
     let has_at_least_one_hyphen = host.contains('-');
     let hyphens_are_separated_by_valid_chars =
-        has_at_least_one_hyphen.then(|| host.split('-').all(|part| part.chars().all(|c| c.is_ascii_alphanumeric())));
+        has_at_least_one_hyphen.then(|| host.split('-').all(|part| part.chars().all(|c| c == '.' || c.is_ascii_alphanumeric())));
     let tld = host.split('.').last();
     // Prevents e.g. numbers being used as TLDs (which in turn prevents e.g. mistakes in IPv4 addresses as being detected as a domain).
     let tld_exists_and_is_not_number = tld.map(|tld| tld.parse::<i32>().is_err()).unwrap_or(false);
@@ -348,4 +348,13 @@ mod tests {
         assert_eq!(output.host, Host::Domain("123.com"));
         assert_eq!(output.port, None);
     }
+
+    #[test]
+    fn wrpc_parse_mixed_subdomains() {
+        let input = "alpha-123.beta.gamma.com";
+        let output = parse_host(input).unwrap();
+        assert_eq!(output.scheme, None);
+        assert_eq!(output.host, Host::Domain("alpha-123.beta.gamma.com"));
+        assert_eq!(output.port, None);
+    }
 }