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 +1,76 @@
+import 'dart:convert';
+import 'package:http/http.dart' as http;
+import '../http_client.dart';
+import '../http_util.dart';
+import '../models.dart';
+import 'base_provider.dart';
+
+/// Faithful port of `g4f.Provider.Yqcloud`.
+class Yqcloud extends BaseProvider {
+  @override
+  String get name => 'Yqcloud';
+
+  @override
+  String get url => 'https://chat9.yqcloud.top';
+
+  @override
+  bool get working => true;
+
+  @override
+  List<String> get models => const ['gpt-4'];
+
+  @override
+  String get defaultModel => 'gpt-4';
+
+  @override
+  Map<String, String> get modelAliases => const {
+        G4FModels.gpt4o: 'gpt-4',
+        G4FModels.gpt4oMini: 'gpt-4',
+      };
+
+  static const _endpoint = 'https://api.binjie.fun/api/generateStream';
+
+  @override
+  Stream<String> createAsyncGenerator(
+    String model,
+    List<Message> messages, {
+    bool stream = false,
+  }) async* {
+    final systemMessage = extractSystemMessage(messages);
+    final history = [
+      for (final m in messages)
+        if (m.role != Role.system) m,
+    ];
+    final prompt = formatPrompt(history, includeSystem: false);
+    final userId = '#/chat/${DateTime.now().millisecondsSinceEpoch}';
+
+    final req = http.Request('POST', Uri.parse(_endpoint));
+    req.headers.addAll({
+      'accept': 'application/json, text/plain, */*',
+      'accept-language': 'en-US,en;q=0.9',
+      'content-type': 'application/json',
+      'origin': url,
+      'referer': '$url/',
+      'user-agent': kDesktopUserAgent,
+    });
+    req.body = jsonEncode({
+      'prompt': prompt,
+      'userId': userId,
+      'network': true,
+      'system': systemMessage,
+      'withoutContext': false,
+      'stream': true,
+    });
+
+    final response = await g4fHttp.send(req).timeout(requestTimeout);
+    if (response.statusCode != 200) {
+      final err = await response.stream.bytesToString();
+      throw Exception('$name returned ${response.statusCode}: $err');
+    }
+    final fullText = utf8.decode(await response.stream.toBytes()).trim();
+    if (!looksLikeModelOutput(fullText) || fullText.contains('Error:')) {
+      throw Exception('$name unusable body');
+    }
+    yield fullText;
+  }
+}