Fix D* image loading issue by adding client headers to requests for image

Fixes Issue #105

lib/controls/html_text_viewer_control.dart

@@ -1,9 +1,12 @@
 import 'dart:async';
 
+import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_widget_from_html_core/flutter_widget_from_html_core.dart';
 import 'package:html/dom.dart' as dom;
 
+import '../globals.dart';
+
 const _emojiSize = {'width': '20px', 'height': '20px', 'margin-left': '-3px'};
 
 class HtmlTextViewerControl extends StatelessWidget {
@@ -17,6 +20,7 @@ class HtmlTextViewerControl extends StatelessWidget {
   Widget build(BuildContext context) {
     return HtmlWidget(
       content,
+      factoryBuilder: () => MyWidgetFactory(),
       customStylesBuilder: _defaultStylesBuilder,
       onTapUrl: onTapUrl,
     );
@@ -30,3 +34,28 @@ class HtmlTextViewerControl extends StatelessWidget {
     return null;
   }
 }
+
+class MyWidgetFactory extends WidgetFactory {
+  @override
+  Widget? buildImageWidget(BuildMetadata meta, ImageSource src) {
+    final url = src.url;
+    if (!url.startsWith(RegExp('https?://'))) {
+      return super.buildImageWidget(meta, src);
+    }
+
+    Map<String, String> headers = {'user-agent': userAgent};
+
+    return CachedNetworkImage(
+      httpHeaders: headers,
+      errorWidget: (context, _, error) =>
+          onErrorBuilder(context, meta, error, src) ?? widget0,
+      fit: BoxFit.fill,
+      imageUrl: url,
+      progressIndicatorBuilder: (context, _, progress) {
+        final t = progress.totalSize;
+        final v = t != null && t > 0 ? progress.downloaded / t : null;
+        return onLoadingBuilder(context, meta, v, src) ?? widget0;
+      },
+    );
+  }
+}

pubspec.lock

@@ -556,10 +556,10 @@ packages:
     dependency: "direct main"
     description:
       name: flutter_widget_from_html_core
-      sha256: df7c7c9e5ea144f7ab0adfbad733b4d4f7d408ab733c94e6e9fdcb327af92aa1
+      sha256: b1048fd119a14762e2361bd057da608148a895477846d6149109b2151d2f7abf
       url: "https://pub.dev"
     source: hosted
-    version: "0.15.1"
+    version: "0.15.2"
   freezed_annotation:
     dependency: transitive
     description:

pubspec.yaml

@@ -24,7 +24,7 @@ dependencies:
   flutter_secure_storage: ^9.2.2
   flutter_svg: ^2.0.10+1
   flutter_web_auth_2: ^3.1.2
-  flutter_widget_from_html_core: ^0.15.1
+  flutter_widget_from_html_core: ^0.15.2
   get_it: ^7.7.0
   get_it_mixin: ^4.2.2
   go_router: ^14.1.2