init2

bin/generate_models.dart

@@ -11,6 +11,12 @@ void main() async {
 
   final result = '''
 import 'package:xml/xml.dart';
+
+XmlElement getProp(XmlElement xml, String name) {
+  final result = xml.findElements(name);
+  return result.isNotEmpty ? result.first : null;
+}
+
 ${models.join('\n')}
   ''';
 
@@ -58,23 +64,23 @@ Future<String> getModel(String url) async {
     switch (field.type.name) {
       case 'String':
         buffer.writeln(
-            "      ${field.dartName} = xml.findElements('${field.name}').first.text;");
+            "      ${field.dartName} = getProp(xml, '${field.name}')?.text;");
         break;
       case 'int':
         buffer.writeln(
-            "      ${field.dartName} = int.parse(xml.findElements('${field.name}').first.text);");
+            "      ${field.dartName} = int.tryParse(getProp(xml, '${field.name}')?.text);");
         break;
       case 'bool':
         buffer.writeln(
-            "      ${field.dartName} = xml.findElements('${field.name}').first.text == 'TRUE';");
+            "      ${field.dartName} = getProp(xml, '${field.name}')?.text == 'TRUE';");
         break;
       case 'DateTime':
         buffer.writeln(
-            "      ${field.dartName} = DateTime.parse(xml.findElements('${field.name}').first.text);");
+            "      ${field.dartName} = DateTime.parse(getProp(xml, '${field.name}')?.text);");
         break;
       default:
         buffer.writeln(
-            "      ${field.dartName} = ${field.type.name}.fromXml(xml.findElements('${field.name}').first);");
+            "      ${field.dartName} = ${field.type.name}.fromXml(getProp(xml, '${field.name}'));");
     }
   }
   buffer.writeln('  }');

lib/src/minio.dart

 import 'package:http/http.dart';
+import 'package:minio/models.dart';
 import 'package:minio/src/minio_errors.dart';
 import 'package:minio/src/minio_helpers.dart';
 import 'package:minio/src/minio_s3.dart';
 import 'package:minio/src/minio_sign.dart';
+import 'package:xml/xml.dart' as xml;
 
 class MinioRequest extends Request {
   MinioRequest(String method, Uri url) : super(method, url);
@@ -144,13 +146,23 @@ class Minio {
   Future<String> getBucketRegion(String bucket) async {
     MinioInvalidBucketNameError.check(bucket);
     if (region != null) return region;
-    
+
     final resp = await _client.request(
       method: 'GET',
       bucket: bucket,
       region: 'us-east-1',
       query: {'location': null},
     );
+
+    validate(resp);
     return resp.body;
   }
 }
+
+void validate(Response response) {
+  if (response.statusCode >= 400) {
+    final body = xml.parse(response.body);
+    final error = Error.fromXml(body.rootElement);
+    throw MinioS3Error(error.message, error, response);
+  }
+}

lib/src/minio_errors.dart

 import 'package:http/http.dart';
+import 'package:minio/models.dart';
 import 'package:minio/src/minio_helpers.dart';
 
 class MinioError {
@@ -74,7 +75,8 @@ class MinioInvalidXMLError extends MinioError {
 }
 
 class MinioS3Error extends MinioError {
-  MinioS3Error(String message) : super(message);
+  MinioS3Error(String message, [this.error, this.response]) : super(message);
 
+  Error error;
   Response response;
 }