PassWebService use punycode converted webServiceURL + test

lib/pkpass/models/pass_web_service.dart

@@ -1,3 +1,5 @@
+import 'package:punycode_converter/punycode_converter.dart';
+
 /// Metadata required for Pass Web Service
 ///
 /// https://developer.apple.com/library/archive/documentation/PassKit/Reference/PassKit_WebService/WebService.html#//apple_ref/doc/uid/TP40011988
@@ -29,7 +31,8 @@ class PassWebService {
     if (uri == null || uri.scheme != 'https') return null;
     return PassWebService(
       authenticationToken: authenticationToken,
-      webServiceURL: uri,
+      // URLs due to IDNA2008
+      webServiceURL: uri.punyEncoded,
     );
   }
 }

pubspec.yaml

@@ -17,6 +17,7 @@ dependencies:
   crypto: ^3.0.3
   http: ^1.0.0
   intl: ">=0.17.0 <1.0.0"
+  punycode_converter: ^0.2.1
 
 topics:
   - wallet

test/pkpass_test.dart

@@ -126,4 +126,28 @@ void main() {
       expect(scaled, 'logo@4x.png');
     });
   });
+
+  test('Check Punyc encoding of Domain in Webservice', () {
+    // per default Uri.parse does not punycode!
+    final url = "https://my-äöü-domain.com/endpoint/1234/";
+    final token = "0000000000000000";
+    final webService =
+        PassWebService.maybe(webServiceURL: url, authenticationToken: token);
+
+    expect(
+      webService!.webServiceURL,
+      Uri.parse("https://xn--my--domain-s5a0tyc.com/endpoint/1234"),
+    );
+  });
+  test('Double Check Domain not needed Puny encoding in Webservice', () {
+    final url = "https://my-domain.com/endpoint/1234/";
+    final token = "0000000000000000";
+    final webService =
+        PassWebService.maybe(webServiceURL: url, authenticationToken: token);
+
+    expect(
+      webService!.webServiceURL,
+      Uri.parse("https://my-domain.com/endpoint/1234"),
+    );
+  });
 }