Fixes #415

lib/utils/http_utils.dart

@@ -101,7 +101,9 @@ String stripUrlParams(String url) {
 
 (List<ResponseBodyView>, String?) getResponseBodyViewOptions(
     MediaType? mediaType) {
-  if (mediaType != null) {
+  if (mediaType == null) {
+    return (kRawBodyViewOptions, null);
+  }
   var type = mediaType.type;
   var subtype = mediaType.subtype;
   if (kResponseBodyViewOptions.containsKey(type)) {
@@ -128,7 +130,6 @@ String stripUrlParams(String url) {
       subtype
     );
   }
-  }
   return (kNoBodyViewOptions, null);
 }
 

lib/widgets/response_widgets.dart

@@ -345,12 +345,14 @@ class ResponseBody extends StatelessWidget {
       );
     }
 
-    var mediaType = responseModel.mediaType;
+    final mediaType =
-    if (mediaType == null) {
+        responseModel.mediaType ?? MediaType(kTypeText, kSubTypePlain);
-      return ErrorMessage(
+    // Fix #415: Treat null Content-type as plain text instead of Error message
-          message:
+    // if (mediaType == null) {
-              '$kMsgUnknowContentType - ${responseModel.contentType}. $kUnexpectedRaiseIssue');
+    //   return ErrorMessage(
-    }
+    //       message:
+    //           '$kMsgUnknowContentType - ${responseModel.contentType}. $kUnexpectedRaiseIssue');
+    // }
 
     var responseBodyView = getResponseBodyViewOptions(mediaType);
     var options = responseBodyView.$1;

test/widgets/response_widgets_test.dart

@@ -214,8 +214,13 @@ void main() {
         findsOneWidget);
   });
 
-  testWidgets('Testing Response Body, no mediaType', (tester) async {
+  testWidgets(
-    var responseModelNoHeaders = responseModel.copyWith(headers: null);
+      'Testing Response Body, no mediaType; shoud be default plaintext preview',
+      (tester) async {
+    var responseModelNoHeaders = responseModel.copyWith(
+      headers: null,
+      formattedBody: null,
+    );
     var requestModelNoResponseHeaders =
         testRequestModel.copyWith(httpResponseModel: responseModelNoHeaders);
 
@@ -230,10 +235,8 @@ void main() {
       ),
     );
 
-    expect(
+    expect(find.text("Raw"), findsOneWidget);
-        find.text(
+    expect(find.text('{"data":"world"}'), findsOneWidget);
-            'Unknown Response Content-Type - ${responseModelNoHeaders.contentType}. $kUnexpectedRaiseIssue'),
-        findsOneWidget);
   });
 
   testWidgets('Testing Response Body for No body view', (tester) async {