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 +1,74 @@
+import 'dart:convert';
+import '../http_client.dart';
+import '../http_util.dart';
+import '../models.dart';
+import '../sse.dart';
+import 'base_provider.dart';
+
+/// Port of g4f.Provider.You (default youchat mode, no login).
+class YouChat extends BaseProvider {
+  @override
+  String get name => 'You';
+
+  @override
+  bool get working => true;
+
+  @override
+  List<String> get models => ['gpt-3.5-turbo', 'gpt-4o'];
+
+  @override
+  String get defaultModel => 'gpt-3.5-turbo';
+
+  @override
+  Stream<String> createAsyncGenerator(
+    String model,
+    List<Message> messages, {
+    bool stream = false,
+  }) async* {
+    final res = await g4fHttp
+        .post(
+          Uri.parse('https://you.com/api/streamingSearch'),
+          headers: browserHeaders(
+            origin: 'https://you.com',
+            referer: 'https://you.com/search?fromSearchBar=true&tbm=youchat',
+            accept: 'text/event-stream',
+          ),
+          body: {
+            'q': formatPrompt(messages),
+            'domain': 'youchat',
+            'selectedChatMode': 'default',
+            'chat': '[]',
+          },
+        )
+        .timeout(requestTimeout);
+    if (res.statusCode != 200) {
+      throw Exception('You ${res.statusCode}');
+    }
+    final raw = res.body;
+      final buf = StringBuffer();
+      String? event;
+      for (final line in raw.split(RegExp(r'\r?\n'))) {
+        if (line.startsWith('event:')) {
+          event = line.substring(6).trim();
+        } else if (line.startsWith('data:')) {
+          final dataStr = line.substring(5).trim();
+          try {
+            final data = jsonDecode(dataStr);
+            if (data is Map) {
+              if (event == 'youChatToken' && data['youChatToken'] is String) {
+                buf.write(data['youChatToken']);
+              } else if (event == 'youChatUpdate' && data['t'] is String) {
+                buf.write(data['t']);
+              }
+            }
+          } catch (_) {}
+        }
+      }
+      var text = buf.toString().trim();
+      if (!looksLikeModelOutput(text)) {
+        text = extractAllSseContent(raw).join().trim();
+      }
+      if (!looksLikeModelOutput(text)) throw Exception('You empty');
+      yield text;
+  }
+}