Fix issue foss42#630: Unable to override Content-Type header charset

Author: Vastav1812

packages/apidash_core/lib/models/http_request_model.dart

@@ -27,6 +27,7 @@ class HttpRequestModel with _$HttpRequestModel {
     @Default(ContentType.json) ContentType bodyContentType,
     String? body,
     String? query,
+    @Default(false) bool useRawContentType,
     List<FormDataModel>? formData,
   }) = _HttpRequestModel;
 
@@ -40,7 +41,14 @@ class HttpRequestModel with _$HttpRequestModel {
   List<NameValueModel>? get enabledParams =>
       getEnabledRows(params, isParamEnabledList);
 
-  Map<String, String> get enabledHeadersMap => rowsToMap(enabledHeaders) ?? {};
+  Map<String, String> get enabledHeadersMap {
+    final map = rowsToMap(enabledHeaders) ?? {};
+    if (useRawContentType && map.containsKey(HttpHeaders.contentTypeHeader)) {
+      // Use the raw Content-Type header value without charset
+      map[HttpHeaders.contentTypeHeader] = map[HttpHeaders.contentTypeHeader]!.split(";")[0];
+    }
+    return map;
+  }
   Map<String, String> get enabledParamsMap => rowsToMap(enabledParams) ?? {};
 
   bool get hasContentTypeHeader => enabledHeadersMap.hasKeyContentType();

packages/apidash_core/lib/services/http_service.dart

@@ -49,10 +49,11 @@ Future<(HttpResponse?, Duration?, String?)> sendHttpRequest(
               body = requestBody;
               headers[HttpHeaders.contentLengthHeader] =
                   contentLength.toString();
-              if (!requestModel.hasContentTypeHeader) {
-                headers[HttpHeaders.contentTypeHeader] =
-                    requestModel.bodyContentType.header;
-              }
+                if (!requestModel.hasContentTypeHeader) {
+                  headers[HttpHeaders.contentTypeHeader] = requestModel.useRawContentType 
+                      ? requestModel.bodyContentType.header.split(";")[0]
+                      : requestModel.bodyContentType.header;
+                }
             }
           }
           if (isMultiPartRequest) {
@@ -103,9 +104,11 @@ Future<(HttpResponse?, Duration?, String?)> sendHttpRequest(
           if (contentLength > 0) {
             body = requestBody;
             headers[HttpHeaders.contentLengthHeader] = contentLength.toString();
-            if (!requestModel.hasContentTypeHeader) {
-              headers[HttpHeaders.contentTypeHeader] = ContentType.json.header;
-            }
+                if (!requestModel.hasContentTypeHeader) {
+                  headers[HttpHeaders.contentTypeHeader] = requestModel.useRawContentType 
+                      ? requestModel.bodyContentType.header.split(";")[0]
+                      : requestModel.bodyContentType.header;
+                }
           }
         }
         response = await client.post(

test/content_type_test.dart

@@ -0,0 +1,28 @@
+import 'dart:io';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('Content-Type Header Tests', () {
+    test('useRawContentType removes charset from Content-Type header', () {
+      // Simulate the behavior directly
+      final contentTypeWithCharset = 'application/json; charset=utf-8';
+      final contentTypeWithoutCharset = contentTypeWithCharset.split(';')[0];
+      
+      // Verify the splitting works
+      expect(contentTypeWithoutCharset, equals('application/json'));
+      
+      // Simulate the actual fix logic
+      final useRawContentType = true;
+      final map = {'Content-Type': 'application/json; charset=utf-8'};
+      
+      if (useRawContentType && map.containsKey('Content-Type')) {
+        map['Content-Type'] = map['Content-Type']!.split(';')[0];
+      }
+      
+      // Verify the result
+      expect(map['Content-Type'], equals('application/json'));
+      
+      print('Test PASSED: Content-Type header without charset is: ${map['Content-Type']}');
+    });
+  });
+}