implemented har feature

packages/devtools_app/lib/src/screens/network/constants.dart

@@ -7,7 +7,6 @@ enum NetworkEventKeys {
   version,
   creator,
   name,
-  creatorVersion,
   pages,
   startedDateTime,
   id,
@@ -56,6 +55,7 @@ enum NetworkEventKeys {
   expires,
   httpOnly,
   secure,
+  reasonPhrase,
 }
 
 class NetworkEventDefaults {

packages/devtools_app/lib/src/screens/network/har_builder.dart

@@ -25,7 +25,7 @@ Map<String, Object?> buildHar(List<DartIOHttpRequestData> httpRequests) {
   // Build the creator
   final creator = <String, Object?>{
     NetworkEventKeys.name.name: NetworkEventDefaults.creatorName,
-    NetworkEventKeys.creatorVersion.name: devToolsVersion,
+    NetworkEventKeys.version.name: devToolsVersion,
   };
 
   // Build the entries

packages/devtools_app/lib/src/screens/network/har_data_entry.dart

@@ -1,3 +1,7 @@
+// Copyright 2024 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'dart:convert';
 
 import '../../shared/http/http_request_data.dart';
@@ -133,7 +137,7 @@ class HarDataEntry {
       // Response
       NetworkEventKeys.response.name: <String, Object?>{
         NetworkEventKeys.status.name: e.status,
-        NetworkEventKeys.statusText.name: '',
+        NetworkEventKeys.statusText.name: e.general[NetworkEventKeys.reasonPhrase.name]??'',
         NetworkEventKeys.httpVersion.name:
             NetworkEventDefaults.responseHttpVersion,
         NetworkEventKeys.cookies.name: responseCookies,
@@ -164,15 +168,19 @@ class HarDataEntry {
 
       // Custom fields
       // har spec requires underscore to be added for custom fields, hence removing them
+      // Note: the 'isolateId' field is kept empty because DartIOHttpRequestData does not expose it
+      // (but it is required by HttpProfileRequestRef.parse)
       NetworkEventCustomFieldKeys.isolateId: '',
       NetworkEventCustomFieldKeys.id: e.id,
       NetworkEventCustomFieldKeys.startTime:
           e.startTimestamp.microsecondsSinceEpoch,
+      // Note: The 'events' field is kept empty because DartIOHttpRequestData does not expose it
+      // (but it is required by HttpProfileRequestRef.parse)
       NetworkEventCustomFieldKeys.events: [],
     };
   }
 
-  /// Converts the HAR data entry back to [DartIOHttpRequestData].
+  /// Returns the original [DartIOHttpRequestData] that this HAR entry was created from or parsed into.
   DartIOHttpRequestData toDartIOHttpRequest() {
     return request;
   }
@@ -204,7 +212,7 @@ class HarDataEntry {
     return transformedHeaders;
   }
 
-  // Convert list of headers to map
+  /// Convert list of headers to map
   static void _convertHeaders(Map<String, Object?> requestData) {
     final reqData =
         requestData[NetworkEventKeys.request.name] as Map<String, Object?>;
@@ -225,7 +233,7 @@ class HarDataEntry {
     }
   }
 
-  // Removing underscores from custom fields
+  /// Removing underscores from custom fields
   static Map<String, Object?> _remapCustomFieldKeys(
     Map<String, Object?> originalMap,
   ) {

packages/devtools_app/lib/src/shared/http/http_request_data.dart

@@ -47,7 +47,7 @@ class DartIOHttpRequestData extends NetworkRequest {
   }
 
   factory DartIOHttpRequestData.fromJson(
-    Map<String, dynamic> modifiedRequestData,
+    Map<String, Object?> modifiedRequestData,
     Map<String, Object?>? requestPostData,
     Map<String, Object?>? responseContent,
   ) {

packages/devtools_app/test/network/har_network_test.dart

@@ -5,14 +5,16 @@
 import 'dart:convert';
 import 'dart:io';
 
+import 'package:devtools_app/src/screens/network/constants.dart';
+import 'package:devtools_app/src/screens/network/har_data_entry.dart';
 import 'package:devtools_app/src/screens/network/har_network_data.dart';
 
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {
   final file = File('test/network/sample_requests.json');
   final fileContent = file.readAsStringSync();
-  final jsonData = jsonDecode(fileContent);
+  final jsonData = jsonDecode(fileContent) as Map<String, Object?>;
 
   group('HarNetworkData', () {
     test('toJson serializes correctly', () {
@@ -54,4 +56,45 @@ void main() {
       expect(entry?['comment'], '');
     });
   });
+
+  group('HarDataEntry', () {
+    test('fromJson parses correctly', () {
+      final entryJson =
+          ((jsonData['log'] as Map<String, Object?>)['entries'] as List).first
+              as Map<String, Object?>;
+      final harDataEntry = HarDataEntry.fromJson(entryJson);
+
+      expect(harDataEntry.request.uri.toString(),
+          'https://jsonplaceholder.typicode.com/albums/1');
+      expect(harDataEntry.request.method, 'GET');
+      expect(harDataEntry.request.requestHeaders, isNotEmpty);
+      expect(harDataEntry.request.requestCookies, isEmpty);
+    });
+
+    test('toJson serializes correctly', () {
+      final entryJson =
+          ((jsonData['log'] as Map<String, Object?>)['entries'] as List).first
+              as Map<String, Object?>;
+      final harDataEntry = HarDataEntry.fromJson(entryJson);
+      final json = HarDataEntry.toJson(harDataEntry.request);
+
+      expect(json['startedDateTime'], '2024-07-11T13:19:35.156Z');
+      expect(json['request'], isNotNull);
+      final request = json['request'] as Map<String, Object?>?;
+      expect(request?['method'], 'GET');
+      expect(request?['url'], 'https://jsonplaceholder.typicode.com/albums/1');
+      expect(request?['httpVersion'], 'HTTP/1.1');
+      expect(request?['cookies'], isEmpty);
+
+      expect(json['cache'], isEmpty);
+      final timings = json['timings'] as Map<String, Object?>?;
+      expect(timings?['blocked'], NetworkEventDefaults.blocked);
+      expect(timings?['dns'], NetworkEventDefaults.dns);
+      expect(timings?['connect'], NetworkEventDefaults.connect);
+      expect(timings?['send'], 1);
+      expect(timings?['receive'], 1);
+      expect(timings?['ssl'], NetworkEventDefaults.ssl);
+      expect(json['comment'], '');
+    });
+  });
 }

packages/devtools_app/test/network/sample_requests.json

@@ -3,7 +3,7 @@
     "version": "1.2",
     "creator": {
       "name": "devtools",
-      "creatorVersion": "2.38.0-dev.0"
+      "version": "2.38.0-dev.0"
     },
     "entries": [
       {