feat: embed a Flutter G4F client with Cronet, cookie jar, and origin WebView

Port the Oracle off the Python g4f container onto on-device providers: Chromium HTTP via Cronet, a shared cookie session, IterList retry, hosted OpenAI-compat aggregators, and same-origin WebView fallbacks instead of CORS fetch.
2026-09-01 22:05:38 +05:00
parent f3e7412cf9
commit fbf04d90db
49 changed files with 4856 additions and 92 deletions
@@ -0,0 +1,81 @@
+import 'dart:convert';
+import 'package:http/http.dart' as http;
+import '../http_client.dart';
+import 'package:uuid/uuid.dart';
+import '../http_util.dart';
+import '../models.dart';
+import 'base_provider.dart';
+
+/// Port of g4f.Provider.Quillbot — full JSON-lines reply, no UI stream.
+class Quillbot extends BaseProvider {
+  @override
+  String get name => 'Quillbot';
+
+  @override
+  bool get working => true;
+
+  @override
+  List<String> get models => ['quillbot', 'quillbot-search'];
+
+  @override
+  String get defaultModel => 'quillbot';
+
+  @override
+  Stream<String> createAsyncGenerator(
+    String model,
+    List<Message> messages, {
+    bool stream = false,
+  }) async* {
+    final conversationId = const Uuid().v4();
+    final url =
+        'https://quillbot.com/api/ai-chat/chat/conversation/$conversationId';
+    final payload = {
+      'message': {'content': '${formatPrompt(messages)}\n\n'},
+      'context': {
+        'editorContext': '',
+        'selectionContext': '',
+        'userDialect': 'en-us',
+        'apiVersion': 2,
+      },
+      'origin': {'name': 'ai-chat.chat', 'url': 'https://quillbot.com'},
+      if (model.contains('search')) 'tools': {'web_search_builtin': {}},
+    };
+
+    final req = http.Request('POST', Uri.parse(url));
+    req.headers.addAll(browserHeaders(
+      origin: 'https://quillbot.com',
+      referer: 'https://quillbot.com/ai-chat/c/$conversationId',
+      contentType: 'application/json',
+      desktop: true,
+      extra: {
+        'accept': 'text/event-stream',
+        'platform-type': 'webapp',
+        'qb-product': 'AI-CHAT',
+        'useridtoken': 'empty-token',
+        'webapp-version': '42.61.1',
+      },
+    ));
+    req.body = jsonEncode(payload);
+
+    final res = await g4fHttp.send(req).timeout(requestTimeout);
+      if (res.statusCode != 200) {
+        throw Exception('Quillbot ${res.statusCode}');
+      }
+      final raw = utf8.decode(await res.stream.toBytes().timeout(requestTimeout));
+      final buf = StringBuffer();
+      for (final line in raw.split(RegExp(r'\r?\n'))) {
+        if (line.trim().isEmpty) continue;
+        try {
+          final data = jsonDecode(line);
+          if (data is Map && data['type'] == 'content' && data['content'] is String) {
+            buf.write(data['content']);
+          }
+        } catch (_) {}
+      }
+      final text = buf.toString().trim();
+      if (!looksLikeModelOutput(text)) {
+        throw Exception('Quillbot empty');
+      }
+    yield text;
+  }
+}